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Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


1

NUCLEAR ISLANDS International Leasing  

Broader source: Energy.gov (indexed) [DOE]

ISLANDS ISLANDS International Leasing of Nuclear Fuel Cycle Sites to Provide Enduring Assurance of Peaceful Use Christopher E. Paine and Thomas B. Cochran Current International Atomic Energy Agency safeguards do not provide adequate protection against the diversion to military use of materials or technology from certain types of sensitive nuclear fuel cycle facilities. In view of highly enriched uranium's relatively greater ease of use as a nuclear explosive material than plutonium and the significant diseconomies of commercial spent fuel reprocessing, this article focuses on the need for improved international controls over uranium enrichment facilities as the proximate justification for creation of an International Nuclear Fuel Cycle Association (INFCA). In principle, the proposal is equally applicable to alleviating the proliferation concerns provoked by nuclear fuel

2

International Nuclear Security  

SciTech Connect (OSTI)

This presentation discusses: (1) Definitions of international nuclear security; (2) What degree of security do we have now; (3) Limitations of a nuclear security strategy focused on national lock-downs of fissile materials and weapons; (4) What do current trends say about the future; and (5) How can nuclear security be strengthened? Nuclear security can be strengthened by: (1) More accurate baseline inventories; (2) Better physical protection, control and accounting; (3) Effective personnel reliability programs; (4) Minimize weapons-usable materials and consolidate to fewer locations; (5) Consider local threat environment when siting facilities; (6) Implement pledges made in the NSS process; and (7) More robust interdiction, emergency response and special operations capabilities. International cooperation is desirable, but not always possible.

Doyle, James E. [Los Alamos National Laboratory

2012-08-14T23:59:59.000Z

3

International | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

International | National Nuclear Security Administration International | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog International Home > About Us > Our Programs > Nuclear Security > Nuclear Materials Management & Safeguards System > International International U.S. Department of Energy / U.S. Nuclear Regulatory Commission

4

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

international nuclear assistance dataset, this article findsinternational nuclear assistance dataset. Table 2 presentsinternational nuclear assistance dataset. Table 3 presents

Kroenig, Matthew

2006-01-01T23:59:59.000Z

5

International Nuclear Energy Policy and Cooperation | Department...  

Office of Environmental Management (EM)

International Nuclear Energy Policy and Cooperation International Nuclear Energy Policy and Cooperation Recent Events 6th US-India Civil Nuclear Energy Working Group Meeting 6th...

6

International Nuclear Energy Policy and Cooperation  

Broader source: Energy.gov [DOE]

The Office of International Nuclear Energy Policy and Cooperation (INEPC) collaborates with international partners to support the safe, secure, and peaceful use of nuclear energy. It works both...

7

Nonproliferation & International Security | National Nuclear Security  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nonproliferation & International Security | National Nuclear Security Nonproliferation & International Security | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Nonproliferation & International Security Home > About Us > Our Programs > Nonproliferation > Nonproliferation & International Security Nonproliferation & International Security

8

Nonproliferation & International Security | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Nonproliferation & International Security | National Nuclear Security Nonproliferation & International Security | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Nonproliferation & International Security Home > About Us > Our Programs > Nonproliferation > Nonproliferation & International Security Nonproliferation & International Security

9

Nuclear reactor internals alignment configuration  

DOE Patents [OSTI]

An alignment system that employs jacking block assemblies and alignment posts around the periphery of the top plate of a nuclear reactor lower internals core shroud to align an upper core plate with the lower internals and the core shroud with the core barrel. The distal ends of the alignment posts are chamfered and are closely received within notches machined in the upper core plate at spaced locations around the outer circumference of the upper core plate. The jacking block assemblies are used to center the core shroud in the core barrel and the alignment posts assure the proper orientation of the upper core plate. The alignment posts may alternately be formed in the upper core plate and the notches may be formed in top plate.

Gilmore, Charles B. (Greensburg, PA); Singleton, Norman R. (Murrysville, PA)

2009-11-10T23:59:59.000Z

10

International Programs | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Programs | National Nuclear Security Administration Programs | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The National Nuclear Security Administration International Programs Home > About Us > Our Programs > Emergency Response > International Programs International Programs NNSA prepares for nuclear and radiological emergencies across the globe.

11

International Exercises | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Exercises | National Nuclear Security Administration Exercises | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog International Exercises Home > About Us > Our Programs > Emergency Response > International Programs > International Exercises International Exercises First responders test plans and procedures during a radiation exercise in Murman

12

International Nuclear Services Ltd | Open Energy Information  

Open Energy Info (EERE)

Services Ltd Jump to: navigation, search Name: International Nuclear Services Ltd Place: Cheshire, England, United Kingdom Zip: WA3 6AS Sector: Services Product: England-based firm...

13

International Nuclear Security | National Nuclear Security Administrat...  

National Nuclear Security Administration (NNSA)

Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure...

14

Nuclear Systems Modeling, Simulation & Validation | Nuclear Science...  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Research Areas Fuel Cycle Science & Technology Fusion Nuclear Science Isotope Development and Production Nuclear Security Science & Technology Nuclear Systems Modeling, Simulation...

15

International Materials Protection and Cooperation | National Nuclear  

National Nuclear Security Administration (NNSA)

Materials Protection and Cooperation | National Nuclear Materials Protection and Cooperation | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog International Materials Protection and Cooperation Home > About Us > Our Programs > Nonproliferation > International Materials Protection and Cooperation International Materials Protection and Cooperation

16

PIA - 10th International Nuclear Graphite Specialists Meeting...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

PIA - 10th International Nuclear Graphite Specialists Meeting registration web site PIA - 10th International Nuclear Graphite Specialists Meeting registration web site PIA - 10th...

17

International Energy Outlook 2001 - Nuclear  

Gasoline and Diesel Fuel Update (EIA)

Nuclear Power Nuclear Power picture of a printer Printer Friendly Version (PDF) Nuclear power is projected to represent a growing share of the developing world’s electricity consumption from 1999 through 2020. New plant construction and license extensions for existing plants are expected to produce a net increase in world nuclear capacity. Nuclear power plants generated electricity in 29 countries in 1999. A total of 433 nuclear power reactors were in operation (Figure 61), including 104 in the United States, 59 in France, and 53 in Japan. The largest national share of electricity from nuclear power was in France, at 75 percent (Figure 62). Belgium, Bulgaria, France, Lithuania, Slovenia, Slovakia, Sweden, Ukraine, and South Korea depended on nuclear power for at least 40

18

International nuclear waste management fact book  

SciTech Connect (OSTI)

The International Nuclear Waste Management Fact Book has been compiled to provide current data on fuel cycle and waste management facilities, R and D programs, and key personnel in 24 countries, including the US; four multinational agencies; and 20 nuclear societies. This document, which is in its second year of publication supersedes the previously issued International Nuclear Fuel Cycle Fact Book (PNL-3594), which appeared annually for 12 years. The content has been updated to reflect current information. The Fact Book is organized as follows: National summaries--a section for each country that summarizes nuclear policy, describes organizational relationships, and provides addresses and names of key personnel and information on facilities. International agencies--a section for each of the international agencies that has significant fuel cycle involvement and a list of nuclear societies. Glossary--a list of abbreviations/acronyms of organizations, facilities, and technical and other terms. The national summaries, in addition to the data described above, feature a small map for each country and some general information that is presented from the perspective of the Fact Book user in the US.

Abrahms, C W; Patridge, M D; Widrig, J E

1995-11-01T23:59:59.000Z

19

International Framework for Nuclear Energy Cooperation to Hold...  

Energy Savers [EERE]

Framework for Nuclear Energy Cooperation to Hold Ministerial-Level Meeting Sept. 29 in Warsaw, Poland International Framework for Nuclear Energy Cooperation to Hold...

20

United States-Republic of Korea (ROK) International Nuclear Energy...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

United States-Republic of Korea (ROK) International Nuclear Energy Research Initiative (INERI) Annual Steering Committee Meeting United States-Republic of Korea (ROK) International...

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

Working Party on International Nuclear Data Evaluation Cooperation (WPEC)  

SciTech Connect (OSTI)

The OECD Nuclear Energy Agency (NEA) is organizing the cooperation between the major nuclear data evaluation projects in the world. The NEA Working Party on International Nuclear Data Evaluation Cooperation (WPEC) was established to promote the exchange of information on nuclear data evaluation, measurement, nuclear model calculation, validation, and related topics, and to provide a framework for cooperative activities between the participating projects. The working party assesses nuclear data improvement needs and addresses these needs by initiating joint activities in the framework of dedicated WPEC subgroups. Studies recently completed comprise a number of works related to nuclear data covariance and associated processing issues, as well as more specific studies related to the resonance parameter representation in the unresolved resonance region, the gamma production from fission-product capture reactions, the U-235 capture cross-section, the EXFOR database, and the improvement of nuclear data for advanced reactor systems. Ongoing activities focus on the evaluation of Pu-239 in the resonance region, scattering angular distribution in the fast energy range, and reporting/usage of experimental data for evaluation in the resolved resonance region. New activities include two new subgroups on improved fission product yield evaluation methodologies and on modern nuclear database structures. Future activities under discussion include a pilot project of a Collaborative International Evaluated Library (CIELO) and methods to provide feedback from nuclear and covariance data adjustment for improvement of nuclear data. In addition to the above mentioned short-term, task-oriented subgroups, the WPEC also hosts a longer-term subgroup charged with reviewing and compiling the most important nuclear data requirements in a high priority request list (HPRL).

Giuseppe Palmiotti

2014-06-01T23:59:59.000Z

22

Working Party on International Nuclear Data Evaluation Cooperation (WPEC)  

Science Journals Connector (OSTI)

Abstract The OECD Nuclear Energy Agency (NEA) organizes cooperation between the major nuclear data evaluation projects in the world. The NEA Working Party on International Nuclear Data Evaluation Cooperation (WPEC) was established to promote the exchange of information on nuclear data evaluation, measurement, nuclear model calculation, validation, and related topics, and to provide a framework for cooperative activities between the participating projects. The working party assesses nuclear data improvement needs and addresses these needs by initiating joint activities in the framework of dedicated WPEC subgroups. Studies recently completed comprise a number of works related to nuclear data covariance and associated processing issues, as well as more specific studies related to the resonance parameter representation in the unresolved resonance region, the gamma production from fission product capture reactions, the 235U capture cross section, the EXFOR database, and the improvement of nuclear data for advanced reactor systems. Ongoing activities focus on the evaluation of 239Pu in the resonance region, scattering angular distribution in the fast energy range, and reporting/usage of experimental data for evaluation in the resolved resonance region. New activities include two subgroups on improved fission product yield evaluation methodologies and on modern nuclear database structures. Future activities under discussion include a pilot project for a Collaborative International Evaluated Library Organization (CIELO) and methods to provide feedback from nuclear and covariance data adjustment for improvement of nuclear data. In addition to the above mentioned short-term task-oriented subgroups, WPEC also hosts a longer-term subgroup charged with reviewing and compiling the most important nuclear data requirements in a high priority request list (HPRL).

E. Dupont; M.B. Chadwick; Y. Danon; C. De Saint Jean; M. Dunn; U. Fischer; R.A. Forrest; T. Fukahori; Z. Ge; H. Harada; M. Herman; M. Igashira; A. Ignatyuk; M. Ishikawa; O. Iwamoto; R. Jacqmin; A.C. Kahler; T. Kawano; A.J. Koning; L. Leal; Y.O. Lee; R. McKnight; D. McNabb; R.W. Mills; G. Palmiotti; A. Plompen; M. Salvatores; P. Schillebeeckx

2014-01-01T23:59:59.000Z

23

International Nuclear Fuel Cycle Fact Book  

SciTech Connect (OSTI)

As the US Department of Energy (DOE) and DOE contractors have become increasingly involved with other nations in nuclear fuel cycle and waste management cooperative activities, a need exists costs for a ready source of information concerning foreign fuel cycle programs, facilities, and personnel. This Fact Book has been compiled to meet that need. The information contained in the International Nuclear Fuel Cycle Fact Book has been obtained from many unclassified sources: nuclear trade journals and newsletters; reports of foreign visits and visitors; CEC, IAEA, and OECD/NMEA activities reports; and proceedings of conferences and workshops. The data listed typically do not reflect any single source but frequently represent a consolidation/combination of information.

Leigh, I.W.

1992-05-01T23:59:59.000Z

24

International Nuclear Energy Research Initiative (I-NERI) Annual Reports |  

Broader source: Energy.gov (indexed) [DOE]

International Nuclear Energy Policy and Cooperation International Nuclear Energy Policy and Cooperation » Bilateral Cooperation » International Nuclear Energy Research Initiative (I-NERI) Annual Reports International Nuclear Energy Research Initiative (I-NERI) Annual Reports August 13, 2013 International Nuclear Energy Research Initiative: 2012 Annual Report Nuclear energy represents the single largest carbon-free baseload source of energy in the United States, accounting for nearly 20 percent of the electricity generated and over 60 percent of our low-carbon production. Worldwide, nuclear power generates 14 percent of global electricity. Continually increasing demand for clean energy both domestically and across the globe, combined with research designed to make nuclear power ever-safer and more cost-effective, will keep nuclear in the energy mix for the

25

Improved nuclear safety through international standards  

Science Journals Connector (OSTI)

In this shrinking world what happens in an industry in one country can significantly affect the same industry elsewhere around the globe. In April 1986 a nuclear accident destroyed Unit 4 of Ukraines Chernobyl nuclear power plant focusing worldwide attention on the dozens of Soviet-designed reactors still in operation. The Chemobyl accident led to public concerns about all operating nuclear power plants and in some countries (e.g. Italy and Sweden) to proposals for nationwide plant closures or moratoriums on new construction. However for most former Soviet Union countries plant shutdown was and still is not a viable optionthe plants produce a significant percentage of each nations total electricity and those countries do not have sufficient economic resources to develop alternative power sources. In cooperation with similar programs initiated in Canada Japan and western European countries the U.S. Department of Energy (DOE) is conducting a comprehensive effort to reduce risks at Soviet-designed nuclear power plants until they can be shut down or brought into compliance with international standards. This paper describes DOE-supported initiatives with participating host countries to: improve reliability and accuracy of nondestructive evaluation equipment used for in-service inspection transfer technologies and infrastructure to improve in-service inspections enhance management systems for training and certifying host-country in-service inspection personnel The goal of these initiatives to enhance the use of international standards (ASME ASNT European Standards EN and ISO) in operating and regulatory practices at Soviet-designed nuclear power plants.

S. R. Doctor; R. L. Moffitt; T. T. Taylor; G. Trosman

2000-01-01T23:59:59.000Z

26

International Nuclear Safeguards Inspection Support Tool  

SciTech Connect (OSTI)

The US Department of Energy (DOE) is committed to developing technologies to meet escalating requirements for the International Atomic Energy Agency (IAEA) Non-Proliferation Treaty (NPT) monitoring and associated inspections. This commitment involves the customization and transfer of existing remote monitoring/information management technologies for use by the IAEA. This paper describes an information management system called INSIST International Nuclear Safeguards Inspection Support Tool, which was developed by the Pacific Northwest Laboratory (PNL) to support the IAEA Action Team in its role of monitoring and verifying compliance under United Nations Special Commission (UNSC) Resolutions 687, 707, and 715. Initial emphasis was placed on developing and deploying functionality and databases customized to support the Action Team. Throughout the design and customization of INSIST, emphasis was placed on information storage and retrieval capabilities for data gathered by the Action Team. In addition, PNL provided the Action Team with maps and satellite images and other relevant Iraqi databases to further facilitate the following activities: monitoring nuclear activities, facility operations, and nuclear material inventories assisting in inspection planning and training providing post inspection analysis providing onsite inspection support reporting on inspection findings.

Steinmaus, K.L.; Wukelic, G.E.; Beal, O.M.

1994-03-01T23:59:59.000Z

27

International Nuclear Energy Policy and Cooperation | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

International Nuclear Energy Policy and Cooperation International Nuclear Energy Policy and Cooperation International Nuclear Energy Policy and Cooperation International Nuclear Energy Policy and Cooperation The Office of International Nuclear Energy Policy and Cooperation (INEPC) collaborates with international partners to support the safe, secure, and peaceful use of nuclear energy. It works both bilaterally and multilaterally to accomplish this work. Today, nuclear energy represents the single largest source of, carbon-free baseload energy, accounting for nearly 20% of the electricity generated in the United States and 70% of our low-carbon production, avoiding over 600 million metric tons of carbon emissions. With approximately 440 commercial reactors operating in 30 countries-and 300 more valued at $1.6 trillion

28

International Working Group Meeting Focuses on Nuclear Power Infrastructure  

Broader source: Energy.gov (indexed) [DOE]

International Working Group Meeting Focuses on Nuclear Power International Working Group Meeting Focuses on Nuclear Power Infrastructure Development and Financing of New Nuclear Projects International Working Group Meeting Focuses on Nuclear Power Infrastructure Development and Financing of New Nuclear Projects December 15, 2009 - 1:09pm Addthis VIENNA, AUSTRIA - The multi-nation Infrastructure Development Working Group (IDWG) held its fifth meeting and also a workshop on the financing of international nuclear power projects in Vienna, Austria, on December 9-10, 2009. An official from the U.S. Department of Energy (DOE) led the working group meeting. "As a key component of the international Global Nuclear Energy Partnership (GNEP) program, the Infrastructure Development Working Group supports the safe, secure and responsible use of nuclear energy," said

29

Global nuclear material flow/control model  

SciTech Connect (OSTI)

This is the final report of a two-year, Laboratory Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The nuclear danger can be reduced by a system for global management, protection, control, and accounting as part of an international regime for nuclear materials. The development of an international fissile material management and control regime requires conceptual research supported by an analytical and modeling tool which treats the nuclear fuel cycle as a complete system. The prototype model developed visually represents the fundamental data, information, and capabilities related to the nuclear fuel cycle in a framework supportive of national or an international perspective. This includes an assessment of the global distribution of military and civilian fissile material inventories, a representation of the proliferation pertinent physical processes, facility specific geographic identification, and the capability to estimate resource requirements for the management and control of nuclear material. The model establishes the foundation for evaluating the global production, disposition, and safeguards and security requirements for fissile nuclear material and supports the development of other pertinent algorithmic capabilities necessary to undertake further global nuclear material related studies.

Dreicer, J.S.; Rutherford, D.S.; Fasel, P.K.; Riese, J.M.

1997-10-01T23:59:59.000Z

30

International Nuclear Energy Research Initiative: 2007 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

International Nuclear Energy Research Initiative: 2007 Annual International Nuclear Energy Research Initiative: 2007 Annual Report International Nuclear Energy Research Initiative: 2007 Annual Report The International Nuclear Energy Research Initiative (I-NERI) supports the National Energy Policy by pursuing international collaborations to conduct research that will advance the state of nuclear science and technology in the United States. I-NERI promotes bilateral and multilateral scientific and engineering research and development (R&D) with other nations. Innovative research performed under the I-NERI umbrella addresses key issues affecting the future of nuclear energy and its global deployment by improving cost performance, enhancing safety, and increasing proliferation resistance of future nuclear energy systems. Information on the program

31

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

Organizations, accidents, and nuclear weapons. Princeton,the likelihood of a nuclear accident (Sagan 1993, 1995). potential for a nuclear accident. Yet it seems implausible

Kroenig, Matthew

2006-01-01T23:59:59.000Z

32

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

nature of the nuclear recipients security environment. ThisKeywords: Nuclear weapons proliferation; security; securitynature of the nuclear recipients security environment. This

Kroenig, Matthew

2006-01-01T23:59:59.000Z

33

NNSA Hosts International Nuclear Forensics Workshop with Participants from  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Hosts International Nuclear Forensics Workshop with Participants from Hosts International Nuclear Forensics Workshop with Participants from Ten Countries | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > Media Room > Press Releases > NNSA Hosts International Nuclear Forensics Workshop with ... Press Release NNSA Hosts International Nuclear Forensics Workshop with Participants from

34

International Working Group Meeting Focuses on Nuclear Power Infrastructure  

Broader source: Energy.gov (indexed) [DOE]

Financing of New Nuclear Projects Financing of New Nuclear Projects International Working Group Meeting Focuses on Nuclear Power Infrastructure Development and Financing of New Nuclear Projects December 15, 2009 - 1:09pm Addthis VIENNA, AUSTRIA - The multi-nation Infrastructure Development Working Group (IDWG) held its fifth meeting and also a workshop on the financing of international nuclear power projects in Vienna, Austria, on December 9-10, 2009. An official from the U.S. Department of Energy (DOE) led the working group meeting. "As a key component of the international Global Nuclear Energy Partnership (GNEP) program, the Infrastructure Development Working Group supports the safe, secure and responsible use of nuclear energy," said Assistant Secretary for Nuclear Energy Warren F. Miller, Jr. "The group

35

International Nuclear Energy Research Initiative: 2012 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

International Nuclear Energy Research Initiative: 2012 Annual International Nuclear Energy Research Initiative: 2012 Annual Report International Nuclear Energy Research Initiative: 2012 Annual Report Nuclear energy represents the single largest carbon-free baseload source of energy in the United States, accounting for nearly 20 percent of the electricity generated and over 60 percent of our low-carbon production. Worldwide, nuclear power generates 14 percent of global electricity. Continually increasing demand for clean energy both domestically and across the globe, combined with research designed to make nuclear power ever-safer and more cost-effective, will keep nuclear in the energy mix for the foreseeable future. U.S. researchers are collaborating with nuclear scientists and engineers around the world to develop new technologies that will lower costs,

36

National and international nuclear material monitoring  

SciTech Connect (OSTI)

The status of nuclear materials in both the U.S. and Former Soviet Union is changing based upon the execution of agreements relative to weapons materials production and weapon dismantlement. The result of these activities is that a considerably different emphasis is being placed on how nuclear materials are viewed and utilized. Even though much effort is being expended on the final disposition of these materials, the interim need for storage and security of the material is increasing. Both safety and security requirements exist to govern activities when these materials are placed in storage. These requirements are intended to provide confidence that the material is not being misused and that the storage operations are conducted safely. Both of these goals can be significantly enhanced if technological monitoring of the material is performed. This paper will briefly discuss the traditional manual methods of U.S. and international material monitoring and then present approaches and technology that are available to achieve the same goals under the evolving environment.

Waddoups, I.G.

1996-07-01T23:59:59.000Z

37

Other International Nuclear Energy Learning Resources for Home and School -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Other International Resources > Part 2 Other International Resources > Part 2 Search Go Home Postdocs Students Student Outreach Resources for Schools U.S.-based International (English) International (Other) Events IGED 2013 Science Careers in Search of Women Girls, choose a career in Nuclear Science and Technology! Argonne Nuclear Engineers tell why they chose a Nuclear Career Resources Contact Us Recent Events Science Careers in Search of Women, Apr. 18, 2013 Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society', Jan. 26, 2013 Getting to know nuclear energy: the past, the present & the future - free public lecture (Nov. 15, 2012, Argonne National Laboratory) On January 26, 2013, Argonne staff members participated in the Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society'

38

International Nuclear Energy Learning Resources for Home and School -  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Other International Resources Other International Resources Search Go Home Postdocs Students Student Outreach Resources for Schools U.S.-based International (English) International (Other) Events IGED 2013 Science Careers in Search of Women Girls, choose a career in Nuclear Science and Technology! Argonne Nuclear Engineers tell why they chose a Nuclear Career Resources Contact Us Recent Events Science Careers in Search of Women, Apr. 18, 2013 Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society', Jan. 26, 2013 Getting to know nuclear energy: the past, the present & the future - free public lecture (Nov. 15, 2012, Argonne National Laboratory) On January 26, 2013, Argonne staff members participated in the Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society'

39

Deputy Secretary Poneman to Attend International Framework for Nuclear  

Broader source: Energy.gov (indexed) [DOE]

to Attend International Framework for to Attend International Framework for Nuclear Energy Cooperation Meeting in Jordan Deputy Secretary Poneman to Attend International Framework for Nuclear Energy Cooperation Meeting in Jordan November 3, 2010 - 12:00am Addthis Washington, D.C. - U.S. Deputy Secretary of Energy Daniel Poneman will represent the United States at the International Framework for Nuclear Energy Cooperation (IFNEC) Executive Committee Meeting in Jordan on Thursday, November 4, 2010. The conference aims to advance cooperation among participating states to promote the peaceful use of nuclear energy in a manner that meets high standards of safety, security and nonproliferation. IFNEC developed out of the Global Nuclear Energy Partnership. Last June, the Global Nuclear Energy Partnership Steering Group agreed to transform to

40

The Nuclear Revolution, Relative Gains, and International Nuclear Assistance  

E-Print Network [OSTI]

204. Bhatia, Shyam. 1988. Nuclear rivals in the Middle East.of the merits of selective nuclear proliferation. Journal ofThe Case for a Ukranian nuclear deterrent. Foreign Affairs.

Kroenig, Matthew

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Thirty-five years of successful international cooperation in nuclear knowledge preservation: the International Nuclear Information System (INIS)  

Science Journals Connector (OSTI)

This paper describes the operations and main activities of the International Nuclear Information System (INIS), which was established 35 years ago as the international mechanism for exchanging information in the fields of peaceful uses of nuclear sciences and technology. It outlines the system's main features, users and products. International cooperation and decentralisation are the distinguishing features of this system. INIS produces, maintains and preserves Member States knowledge in these fields. The system has been instrumental in supporting national nuclear programmes, and thousands of scientists, researchers and universities students are using INIS products to retrieve current and historical nuclear information.

Taghrid Atieh; Robert Workman

2006-01-01T23:59:59.000Z

42

International Nuclear Energy Research Initiative: 2010 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

10 Annual 10 Annual Report International Nuclear Energy Research Initiative: 2010 Annual Report The International Nuclear Energy Research Initiative (I-NERI) is a research-oriented collaborative program that supports the advancement of nuclear science and technology in the United States and the world. Innovative research performed under the I-NERI umbrella addresses key issues affecting the future use of nuclear energy and its global deployment. The 2010 Nuclear Energy Research and Development Roadmap issued by the U.S. Department of Energy, Office of Nuclear Energy (DOE-NE), identifies these issues as high capital costs, safety, high-level nuclear waste management, and non-proliferation. Projects under the I-NERI program investigate ways to address these challenges and support future nuclear

43

International Framework for Nuclear Energy Cooperation to Hold  

Broader source: Energy.gov (indexed) [DOE]

International Framework for Nuclear Energy Cooperation to Hold International Framework for Nuclear Energy Cooperation to Hold Ministerial-Level Meeting Sept. 29 in Warsaw, Poland International Framework for Nuclear Energy Cooperation to Hold Ministerial-Level Meeting Sept. 29 in Warsaw, Poland September 6, 2011 - 3:23pm Addthis Washington, D.C. - The U.S. Department of Energy today announced that Deputy Secretary of Energy Daniel Poneman will lead the U.S. delegation to the International Framework for Nuclear Energy Cooperation (IFNEC) Executive Committee Meeting on Sept. 29 in Warsaw, Poland. The ministerial-level conference aims to advance cooperation among participating states to support the peaceful use of nuclear energy in a manner that meets high standards of safety, security and nonproliferation. The meeting will also feature video remarks by Microsoft founder Bill

44

Sandia Weapon Intern Program visits KCP | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Weapon Intern Program visits KCP | National Nuclear Security Weapon Intern Program visits KCP | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > Sandia Weapon Intern Program visits KCP Sandia Weapon Intern Program visits KCP Posted By Office of Public Affairs Participants in Sandia's Weapon Intern Program recently visited and

45

International Nuclear Energy Research Initiative: 2009 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

9 Annual 9 Annual Report International Nuclear Energy Research Initiative: 2009 Annual Report The International Nuclear Energy Research Initiative (I-NERI) is an international, research-oriented collaboration that supports advancement of nuclear science and technology in the United States and the world. I-NERI promotes bilateral scientific and engineering research and development (R&D) with other nations. Innovative research performed under the I-NERI umbrella addresses key issues affecting the future use of nuclear energy and its global deployment by improving cost performance, enhancing safety, and increasing proliferation resistance of future nuclear energy systems. A link to the program can be found at the U.S. Department of Energy Office of Nuclear Energy website.

46

International Working Group Meeting Focuses on Nuclear Power Infrastructure  

Broader source: Energy.gov (indexed) [DOE]

Needs Needs International Working Group Meeting Focuses on Nuclear Power Infrastructure Development and Needs June 2, 2010 - 12:02pm Addthis VIENNA, Austria - The multi-nation Infrastructure Development Working Group (IDWG) of the Global Nuclear Energy Partnership (GNEP) held its sixth meeting on May 26-27, 2010, in Vienna, Austria. The two-day event included workshops on nuclear energy regulatory agency engagement and the infrastructure needs for international nuclear fuel service frameworks. Officials from the U.S. Department of Energy (DOE) and the U.K. Nuclear Decommissioning Authority co-chaired the working group meeting. "As a key component of the international Global Nuclear Energy Partnership program, the Infrastructure Development Working Group focuses

47

International Nuclear Energy Research Initiative: 2008 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

8 Annual 8 Annual Report International Nuclear Energy Research Initiative: 2008 Annual Report The International Nuclear Energy Research Initiative (I-NERI) is an international, research-oriented initiative that supports the advancement of nuclear science and technology in the United States and the world. I-NERI promotes bilateral scientific and engineering research and development (R&D) with other nations. Innovative research performed under the I-NERI umbrella addresses key issues affecting the future use of nuclear energy and its global deployment by improving cost performance, enhancing safety, and increasing proliferation resistance of future nuclear energy systems. A link to the program can be found at the U.S. Department of Energy, Office of Nuclear Energy (DOE-NE) website:

48

International Energy Outlook 1999 - Nuclear Power  

Gasoline and Diesel Fuel Update (EIA)

nuclear.jpg (5137 bytes) nuclear.jpg (5137 bytes) Nuclear electricity generation remains flat in the IEO99 reference case, representing a declining share of the world’s total electricity consumption. Net reductions in nuclear capacity are projected for most industrialized nations. In 1997, a total of 2,276 billion kilowatthours of electricity was generated from nuclear power worldwide, providing 17 percent of the world’s electricity generation. Among the countries with operating nuclear power plants, national dependence on nuclear power for electricity varies greatly (Figure 53). Ten countries met at least 40 percent of their total electricity demand with generation from nuclear reactors. The prospects for nuclear power to maintain a significant share of worldwide electricity generation are uncertain, despite projected growth of

49

Savannah River Remediation Intern Sees Nuclear Industry as Job Opportunity  

Broader source: Energy.gov (indexed) [DOE]

Savannah River Remediation Intern Sees Nuclear Industry as Job Savannah River Remediation Intern Sees Nuclear Industry as Job Opportunity Savannah River Remediation Intern Sees Nuclear Industry as Job Opportunity July 9, 2012 - 10:00am Addthis Spencer Isom, second year engineering intern for Savannah River Remediation (SRR) and fourth summer at Savannah River Site (SRS), performs a standard equipment check at Saltstone Production Facility. | Photo courtesy of Savannah River Site Spencer Isom, second year engineering intern for Savannah River Remediation (SRR) and fourth summer at Savannah River Site (SRS), performs a standard equipment check at Saltstone Production Facility. | Photo courtesy of Savannah River Site Maddie M. Blair Public Affairs Intern, Savannah River Remediation Why does she keep coming back? "There are so many fascinating processes, people, and work

50

Savannah River Remediation Intern Sees Nuclear Industry as Job Opportunity  

Broader source: Energy.gov (indexed) [DOE]

Savannah River Remediation Intern Sees Nuclear Industry as Job Savannah River Remediation Intern Sees Nuclear Industry as Job Opportunity Savannah River Remediation Intern Sees Nuclear Industry as Job Opportunity July 9, 2012 - 10:00am Addthis Spencer Isom, second year engineering intern for Savannah River Remediation (SRR) and fourth summer at Savannah River Site (SRS), performs a standard equipment check at Saltstone Production Facility. | Photo courtesy of Savannah River Site Spencer Isom, second year engineering intern for Savannah River Remediation (SRR) and fourth summer at Savannah River Site (SRS), performs a standard equipment check at Saltstone Production Facility. | Photo courtesy of Savannah River Site Maddie M. Blair Public Affairs Intern, Savannah River Remediation Why does she keep coming back? "There are so many fascinating processes, people, and work

51

International Nuclear Energy Learning Resources for Home and School (part  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3 3 Search Go Home Postdocs Students Student Outreach Resources for Schools U.S.-based International (English) International (Other) Events IGED 2013 Science Careers in Search of Women Girls, choose a career in Nuclear Science and Technology! Argonne Nuclear Engineers tell why they chose a Nuclear Career Resources Contact Us Recent Events Science Careers in Search of Women, Apr. 18, 2013 Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society', Jan. 26, 2013 Getting to know nuclear energy: the past, the present & the future - free public lecture (Nov. 15, 2012, Argonne National Laboratory) On January 26, 2013, Argonne staff members participated in the Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society' organized by the Chicago Section of the American Nuclear Society. Read the

52

International Nuclear Energy Learning Resources for Home and School (part  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

2 2 Search Go Home Postdocs Students Student Outreach Resources for Schools U.S.-based International (English) International (Other) Events IGED 2013 Science Careers in Search of Women Girls, choose a career in Nuclear Science and Technology! Argonne Nuclear Engineers tell why they chose a Nuclear Career Resources Contact Us Recent Events Science Careers in Search of Women, Apr. 18, 2013 Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society', Jan. 26, 2013 Getting to know nuclear energy: the past, the present & the future - free public lecture (Nov. 15, 2012, Argonne National Laboratory) On January 26, 2013, Argonne staff members participated in the Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society' organized by the Chicago Section of the American Nuclear Society. Read the

53

international security policy | National Nuclear Security Administrati...  

National Nuclear Security Administration (NNSA)

Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure...

54

Statement to the IAEA International Conference on Nuclear Security |  

Broader source: Energy.gov (indexed) [DOE]

to the IAEA International Conference on Nuclear Security to the IAEA International Conference on Nuclear Security Statement to the IAEA International Conference on Nuclear Security July 1, 2013 - 2:19pm Addthis NEWS MEDIA CONTACT (202) 586-4940 AS PREPARED FOR DELIVERY Secretary of Energy Ernest Moniz U.S. Statement to the IAEA International Conference on Nuclear Security Vienna, Austria Monday, July 1, 2013 I want to acknowledge Director General Amano and the President of the Conference, Foreign Minister Martonyi, for their dedicated efforts in organizing this important conference. I also want to express my gratitude to my fellow ministers for their commitment to the issue at hand and for taking the time to engage personally in this serious discussion. In the past two weeks, President Obama has given major speeches on two of

55

Statement to the IAEA International Conference on Nuclear Security |  

Broader source: Energy.gov (indexed) [DOE]

Statement to the IAEA International Conference on Nuclear Security Statement to the IAEA International Conference on Nuclear Security Statement to the IAEA International Conference on Nuclear Security July 1, 2013 - 2:19pm Addthis NEWS MEDIA CONTACT (202) 586-4940 AS PREPARED FOR DELIVERY Secretary of Energy Ernest Moniz U.S. Statement to the IAEA International Conference on Nuclear Security Vienna, Austria Monday, July 1, 2013 I want to acknowledge Director General Amano and the President of the Conference, Foreign Minister Martonyi, for their dedicated efforts in organizing this important conference. I also want to express my gratitude to my fellow ministers for their commitment to the issue at hand and for taking the time to engage personally in this serious discussion. In the past two weeks, President Obama has given major speeches on two of

56

International Nuclear Energy Research Initiative: 2011 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

1 Annual 1 Annual Report International Nuclear Energy Research Initiative: 2011 Annual Report Fiscal year (FY) 2011 marks the ten-year anniversary of the founding of the International Nuclear Energy Research Initiative, or I-NERI. Designed to foster international partnerships that address key issues affecting the future global use of nuclear energy, I-NERI is perhaps even more relevant today than at its establishment. In the face of increasing energy demands coupled with clean energy imperatives, we must clear the hurdles to expanding the role of nuclear power in our energy portfolio. And in an increasingly global society, the importance of international cooperation in these efforts has escalated. For ten years, I-NERI has been a vehicle for establishing bilateral

57

International Energy Outlook 2000 - Nuclear Power  

Gasoline and Diesel Fuel Update (EIA)

In the IEO2000 reference case, nuclear power represents a declining share of the world’s total electricity consumption from 1997 through 2020. Plant retirements are expected to produce net reductions in nuclear capacity in most of the industrialized nations. In the IEO2000 reference case, nuclear power represents a declining share of the world’s total electricity consumption from 1997 through 2020. Plant retirements are expected to produce net reductions in nuclear capacity in most of the industrialized nations. In 1998, a total of 2,291 billion kilowatthours of electricity was generated by nuclear power worldwide, providing 16 percent of the world’s total generation[1]. Among the countries with operating nuclear power plants, national dependence on nuclear energy for electricity varies greatly. Nine countries met at least 40 percent of total electricity demand with generation from nuclear reactors. Figure 68. Nuclear Shares of National Electricity Generation, 1998 [Sources] The prospects for nuclear power to maintain a significant share of

58

Assuaging Nuclear Energy Risks: The Angarsk International Uranium Enrichment Center  

SciTech Connect (OSTI)

The recent nuclear renaissance has motivated many countries, especially developing nations, to plan and build nuclear power reactors. However, domestic low enriched uranium demands may trigger nations to construct indigenous enrichment facilities, which could be redirected to fabricate high enriched uranium for nuclear weapons. The potential advantages of establishing multinational uranium enrichment sites are numerous including increased low enrichment uranium access with decreased nuclear proliferation risks. While multinational nuclear initiatives have been discussed, Russia is the first nation to actualize this concept with their Angarsk International Uranium Enrichment Center (IUEC). This paper provides an overview of the historical and modern context of the multinational nuclear fuel cycle as well as the evolution of Russia's IUEC, which exemplifies how international fuel cycle cooperation is an alternative to domestic facilities.

Myers, Astasia [Stanford University, Stanford, CA 94305, USA and MonAme Scientific Research Center, Ulaanbaatar (Mongolia)

2011-06-28T23:59:59.000Z

59

International Effort to Design Nuclear Fusion Reactor Launched  

Science Journals Connector (OSTI)

International Effort to Design Nuclear Fusion Reactor Launched ... Their mission is to draw up a design concept for a thermonuclear fusion reactor by December 1990. ... The work at Garching is a direct outgrowth of the recently signed International Thermonuclear Experimental Reactor (ITER) pact involving the European Community, Japan, the Soviet Union, and the U.S. (C&EN, April 25, page 19). ...

DERMOT A. O'SULLLVAN

1988-05-23T23:59:59.000Z

60

International Nuclear Energy Research Initiative 2010 Annual Report  

Broader source: Energy.gov (indexed) [DOE]

2010 I-NERI Annual Report 2010 I-NERI Annual Report  | i Foreword The U.S. Department of Energy, Office of Nuclear Energy (DOE-NE), established the International Nuclear Energy Research Initiative (I-NERI) in fiscal year (FY) 2001 to conduct advanced nuclear energy systems research in collaboration with international partners. This annual report provides an update on research and development (R&D) accomplishments which the I-NERI program achieved during FY 2010. I-NERI supports bilateral scientific and engineering collaboration in advanced reactor systems and the nuclear fuel cycle and is linked to two of DOE-NE's primary research programs: Reactor Concepts Research, Development and Demonstration and the Fuel Cycle Research and Development program. I-NERI is designed to foster international partnerships to address key issues

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

International Nuclear Energy Research Initiative: Annual Report 2005 |  

Broader source: Energy.gov (indexed) [DOE]

5 5 International Nuclear Energy Research Initiative: Annual Report 2005 The International Nuclear Energy Research Initiative (I-NERI) supports the National Energy Policy by conducting research to advance the state of nuclear science and technology in the United States. I-NERI sponsors innovative scientific and engineering research and development (R&D) in cooperation with participating countries. The research performed under the I-NERI umbrella addresses the key issues affecting the future of nuclear energy and its global deployment. I-NERI research is directed towards improving cost performance, increasing proliferation resistance, enhancing safety, and improving the waste management of future nuclear energy systems. This I-NERI 2005 Annual Report serves to inform interested parties about

62

International Framework for Nuclear Energy Cooperation to Hold  

Broader source: Energy.gov (indexed) [DOE]

Framework for Nuclear Energy Cooperation to Hold Framework for Nuclear Energy Cooperation to Hold Ministerial-Level Meeting Sept. 29 in Warsaw, Poland International Framework for Nuclear Energy Cooperation to Hold Ministerial-Level Meeting Sept. 29 in Warsaw, Poland September 6, 2011 - 3:10pm Addthis Washington, D.C. - The U.S. Department of Energy today announced that Deputy Secretary of Energy Daniel Poneman will lead the U.S. delegation to the International Framework for Nuclear Energy Cooperation (IFNEC) Executive Committee Meeting on Sept. 29 in Warsaw, Poland. The ministerial-level conference aims to advance cooperation among participating states to support the peaceful use of nuclear energy in a manner that meets high standards of safety, security and nonproliferation. The meeting will also feature video remarks by Microsoft founder Bill

63

International Nuclear Fuel Cycle Fact Book. Revision 5  

SciTech Connect (OSTI)

This Fact Book has been compiled in an effort to provide: (1) an overview of worldwide nuclear power and fuel cycle programs; and (2) current data concerning fuel cycle and waste management facilities, R and D programs, and key personnel in countries other than the United States. Additional information on each country's program is available in the International Source Book: Nuclear Fuel Cycle Research and Development, PNL-2478, Rev. 2. The Fact Book is organized as follows: (1) Overview section - summary tables which indicate national involvement in nuclear reactor, fuel cycle, and waste management development activities; (2) national summaries - a section for each country which summarizes nuclear policy, describes organizational relationships and provides addresses, names of key personnel, and facilities information; (3) international agencies - a section for each of the international agencies which has significant fuel cycle involvement; (4) energy supply and demand - summary tables, including nuclear power projections; (5) fuel cycle - summary tables; and (6) travel aids international dialing instructions, international standard time chart, passport and visa requirements, and currency exchange rate.

Harmon, K.M.; Lakey, L.T.; Leigh, I.W.; Jeffs, A.G.

1985-01-01T23:59:59.000Z

64

International nuclear fuel cycle fact book. Revision 4  

SciTech Connect (OSTI)

This Fact Book has been compiled in an effort to provide (1) an overview of worldwide nuclear power and fuel cycle programs and (2) current data concerning fuel cycle and waste management facilities, R and D programs, and key personnel in countries other than the United States. Additional information on each country's program is available in the International Source Book: Nuclear Fuel Cycle Research and Development, PNL-2478, Rev. 2. The Fact Book is organized as follows: (1) Overview section - summary tables which indicate national involvement in nuclear reactor, fuel cycle, and waste management development activities; (2) national summaries - a section for each country which summarizes nuclear policy, describes organizational relationships and provides addresses, names of key personnel, and facilities information; (3) international agencies - a section for each of the international agencies which has significant fuel cycle involvement; (4) energy supply and demand - summary tables, including nuclear power projections; (5) fuel cycle - summary tables; and (6) travel aids - international dialing instructions, international standard time chart, passport and visa requirements, and currency exchange rate.

Harmon, K.M.; Lakey, L.T.; Leigh, I.W.

1984-03-01T23:59:59.000Z

65

International Nuclear Energy Research Initiative: 2012 Annual Report |  

Broader source: Energy.gov (indexed) [DOE]

2 Annual 2 Annual Report International Nuclear Energy Research Initiative: 2012 Annual Report Nuclear energy represents the single largest carbon-free baseload source of energy in the United States, accounting for nearly 20 percent of the electricity generated and over 60 percent of our low-carbon production. Worldwide, nuclear power generates 14 percent of global electricity. Continually increasing demand for clean energy both domestically and across the globe, combined with research designed to make nuclear power ever-safer and more cost-effective, will keep nuclear in the energy mix for the foreseeable future. U.S. researchers are collaborating with nuclear scientists and engineers around the world to develop new technologies that will lower costs, maximize safety, minimize proliferation risk, and handle used fuel and

66

Nuclear models relevant to evaluation  

SciTech Connect (OSTI)

The widespread use of nuclear models continues in the creation of data evaluations. The reasons include extension of data evaluations to higher energies, creation of data libraries for isotopic components of natural materials, and production of evaluations for radiative target species. In these cases, experimental data are often sparse or nonexistent. As this trend continues, the nuclear models employed in evaluation work move towards more microscopically-based theoretical methods, prompted in part by the availability of increasingly powerful computational resources. Advances in nuclear models applicable to evaluation will be reviewed. These include advances in optical model theory, microscopic and phenomenological state and level density theory, unified models that consistently describe both equilibrium and nonequilibrium reaction mechanism, and improved methodologies for calculation of prompt radiation from fission. 84 refs., 8 figs.

Arthur, E.D.; Chadwick, M.B.; Hale, G.M.; Young, P.G.

1991-01-01T23:59:59.000Z

67

International Nuclear Energy Research Initiative: Annual Report 2006 |  

Broader source: Energy.gov (indexed) [DOE]

6 6 International Nuclear Energy Research Initiative: Annual Report 2006 The International Nuclear Energy Research Initiative (I-NERI) supports the National Energy Policy by conducting research to advance the state of nuclear science and technology in the United States. I-NERI sponsors innovative scientific and engineering research and development (R&D) in cooperation with participating countries. The research performed under the I-NERI umbrella addresses key issues affecting the future of nuclear energy and its global deployment. A link to the program can be found at the NE website. This I-NERI 2006 Annual Report serves to inform interested parties about the program's organization, progress of collaborative research projects undertaken since FY 2003, and future plans for the program. Following is an

68

Computer aided nuclear reactor modeling  

E-Print Network [OSTI]

Nuclear reactor modeling is an important activity that lets us analyze existing as well as proposed systems for safety, correct operation, etc. The quality of a analysis is directly proportional to the quality of the model used. In this work we look...

Warraich, Khalid Sarwar

2012-06-07T23:59:59.000Z

69

Nuclear Shell Model  

E-Print Network [OSTI]

There are similarities between the electronic structure of atoms and nuclear structure. Atomic electrons are arranged in orbits (energy states) subject to the laws of quantum mechanics. The distribution of electrons in these states follows the Pauli exclusion principle. Atomic electrons can be excited up to normally unoccupied states, or they can be removed completely from the atom. From such phenomena one can deduce the structure of atoms. In nuclei there are two groups of like particles, protons and neutrons. Each group is separately distributed over certain energy states subject also to the Pauli exclusion principle. Nuclei have excited states, and nucleons can be added to or removed from a nucleus. Electrons and nucleons have intrinsic angular momenta called intrinsic spins. The total angular momentum of a system of interacting particles reflects the details of the forces between particles. For example, from the coupling of electron angular momentum in atoms we infer an interaction between the spin and the orbital motion of an electron in the field of the nucleus (the spin-orbit coupling). In nuclei there is also a coupling between the orbital motion of a nucleon and its intrinsic spin (but of different origin). In

unknown authors

70

Primer on nuclear exchange models  

SciTech Connect (OSTI)

Basic physics is applied to nuclear force exchange models between two nations. Ultimately, this scenario approach can be used to try and answer the age old question of 'how much is enough?' This work is based on Chapter 2 of Physics of Societal Issues: Calculations on National Security, Environment and Energy (Springer, 2007 and 2014)

Hafemeister, David [Physics Department, Cal Poly University, San Luis Obispo, California (United States)

2014-05-09T23:59:59.000Z

71

Spent nuclear fuel reprocessing modeling  

SciTech Connect (OSTI)

The long-term wide development of nuclear power requires new approaches towards the realization of nuclear fuel cycle, namely, closed nuclear fuel cycle (CNFC) with respect to fission materials. Plant nuclear fuel cycle (PNFC), which is in fact the reprocessing of spent nuclear fuel unloaded from the reactor and the production of new nuclear fuel (NF) at the same place together with reactor plant, can be one variant of CNFC. Developing and projecting of PNFC is a complicated high-technology innovative process that requires modern information support. One of the components of this information support is developed by the authors. This component is the programme conducting calculations for various variants of process flow sheets for reprocessing SNF and production of NF. Central in this programme is the blocks library, where the blocks contain mathematical description of separate processes and operations. The calculating programme itself has such a structure that one can configure the complex of blocks and correlations between blocks, appropriate for any given flow sheet. For the ready sequence of operations balance calculations are made of all flows, i.e. expenses, element and substance makeup, heat emission and radiation rate are determined. The programme is open and the block library can be updated. This means that more complicated and detailed models of technological processes will be added to the library basing on the results of testing processes using real equipment, in test operating mode. The development of the model for the realization of technical-economic analysis of various variants of technologic PNFC schemes and the organization of 'operator's advisor' is expected. (authors)

Tretyakova, S.; Shmidt, O.; Podymova, T.; Shadrin, A.; Tkachenko, V. [Bochvar Institute, 5 Rogova str., Moscow 123098 (Russian Federation); Makeyeva, I.; Tkachenko, V.; Verbitskaya, O.; Schultz, O.; Peshkichev, I. [Russian Federal Nuclear Center - VNIITF E.I. Zababakhin, p.o.box 245, Snezhinsk, 456770 (Russian Federation)

2013-07-01T23:59:59.000Z

72

Status and prospects of internal dosimetry for the Mayak nuclear workers  

Science Journals Connector (OSTI)

Research results on internal dosimetry for workers at the radiochemical and chemical-metallurgical facilities of Mayak Production Association are summarised here. The leading role of plutonium in forming of internal doses in these workers is demonstrated. Biophysical, methodical and analytical principles currently used in monitoring of internal exposure due to incorporated plutonium are described. Capabilities of the techniques utilised are analysed. It is demonstrated that alpha radiometry does not meet the monitoring requirements related to sensitivity in some cases. Problems arising in the process of examination of nuclear workers are analysed. It is shown that the primary directions in the development of the internal dosimetry system imply improvement of plutonium metabolic models (including respiratory tract and extrapulmonary models), conversion to a more sensitive instrumental base when measuring plutonium content in biosubstrates, development of methods for dose estimation in terms of plutonium intake via wounds, and improvement of the worker's exposure scenario technique.

V.V. Khokhryakov; V.F. Khokhryakov; K.G. Suslova; A.V. Efimov; V.V. Vostrotin; A.E. Schadilov

2006-01-01T23:59:59.000Z

73

International Nuclear Fuel Cycle Fact Book. Revision 12  

SciTech Connect (OSTI)

As the US Department of Energy (DOE) and DOE contractors have become increasingly involved with other nations in nuclear fuel cycle and waste management cooperative activities, a need exists costs for a ready source of information concerning foreign fuel cycle programs, facilities, and personnel. This Fact Book has been compiled to meet that need. The information contained in the International Nuclear Fuel Cycle Fact Book has been obtained from many unclassified sources: nuclear trade journals and newsletters; reports of foreign visits and visitors; CEC, IAEA, and OECD/NMEA activities reports; and proceedings of conferences and workshops. The data listed typically do not reflect any single source but frequently represent a consolidation/combination of information.

Leigh, I.W.

1992-05-01T23:59:59.000Z

74

Nuclear Systems Modeling and Design Analysis - Nuclear Engineering Division  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear Systems Nuclear Systems Modeling and Design Analysis CAPABILITIES Overview Nuclear Systems Modeling and Design Analysis Nuclear Systems Technologies Risk and Safety Assessments Nonproliferation and National Security Materials Testing Engineering Computation & Design Engineering Experimentation Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Capabilities Nuclear Systems Modeling and Design Analysis Bookmark and Share Reactor Physics and Fuel Cycle Analysis Reactor Physics and Fuel Cycle Analysis We have played a major role in the design and analysis of most existing and past reactor types and of many

75

International Symposium on Fusion Nuclear Technology (ISFNT-5) SAFETY ISSUES ASSOCIATED WITH MOBILIZED ACTIVATION  

E-Print Network [OSTI]

International Symposium on Fusion Nuclear Technology (ISFNT-5) SAFETY ISSUES ASSOCIATED;International Symposium on Fusion Nuclear Technology (ISFNT-5) heat from in-vessel systems with high neutron Symposium on Fusion Nuclear Technology (ISFNT-5) A design must adequately transfer heat from plasma

California at Los Angeles, University of

76

Nuclear disarmament, disposal of military plutonium and international security problems  

SciTech Connect (OSTI)

One of the major issues of the current debate deals with the question: what does real nuclear disarmament actually involve? It becomes more and more obvious for many experts that it can no longer be limited to the reduction or elimination of delivery vehicles alone, but must necessarily cove the warheads and the fissile materials recovered from them, which should totally or partially be committed to peaceful use and placed under appropriate international safeguards, thus precluding their re-use for as weapons. There are various options as to how to solve the problems of disposal of fissile materials released from weapons. The optimal choice can only be made on the basis of a thorough study. This study should treat the disposal of weapon-grade plutonium and weapon-grade uranium as separate problems. The possible options for plutonium disposition currently discussed are as follows: (a) Storage in a form or under conditions not suitable for use in the production of new types of nuclear weapons. This option seems to be most natural and inevitable at the first phase, subject to determination of storage period, volume, and technology. Besides, the requirements of the international nuclear weapons nonproliferation regime could be met easily. Safe, secure, and controlled temporary storage may provide an appropriate solution of disposal of weapon-grade plutonium in the near future. (b) Energy utilization (conversion) of weapon-grade plutonium. The most efficient option of utilization of plutonium appears to be for nuclear power generation. This option does not exclude storage, but considers it as a temporary phase, which can, however, be a prolonged one: its length is determined by the political decisions made and possibilities existing to transfer plutonium for processing.

Slipchenko, V.S.; Rybatchenkov, V. [Ministry of Foreign Affairs of the Russian Federation, Moscow (Russian Federation). Arms Control and Disarmament Dept.

1995-12-31T23:59:59.000Z

77

Modeling International Relationships in Applied General Equilibrium  

Open Energy Info (EERE)

Modeling International Relationships in Applied General Equilibrium Modeling International Relationships in Applied General Equilibrium (MIRAGE) Jump to: navigation, search LEDSGP green logo.png FIND MORE DIA TOOLS This tool is part of the Development Impacts Assessment (DIA) Toolkit from the LEDS Global Partnership. Tool Summary LAUNCH TOOL Name: Modeling International Relationships in Applied General Equilibrium (MIRAGE) Agency/Company /Organization: International Food Policy Research Institute, Centre d'Etudes Prospectives et d'Informations Internationales (CEPII) Focus Area: Economic Development Topics: Co-benefits assessment, - Macroeconomic Resource Type: Software/modeling tools User Interface: Desktop Application Complexity/Ease of Use: Moderate Website: www.ifpri.org/book-5076/ourwork/program/mirage-model RelatedTo: Global Trade Analysis Project (GTAP) Data Base

78

Development of Improved Models and Designs for Coated-Particle Gas Reactor Fuels -- Final Report under the International Nuclear Energy Research Initiative (I-NERI)  

SciTech Connect (OSTI)

The objective of this INERI project was to develop improved fuel behavior models for gas reactor coated-particle fuels and to explore improved coated-particle fuel designs that could be used reliably at very high burnups and potentially in gas-cooled fast reactors. Project participants included the Idaho National Engineering Laboratory (INEEL), Centre tude Atomique (CEA), and the Massachusetts Institute of Technology (MIT). To accomplish the project objectives, work was organized into five tasks.

David Petti; Philippe Martin; Mayeul Phlip; Ronald Ballinger; Petti does not have NT account

2004-12-01T23:59:59.000Z

79

Safety Series No. 75-INSAG-4, Safety Culture: A report by the International Nuclear Safety Advisory Group, International Atomic Energy Agency  

Broader source: Energy.gov [DOE]

Safety Series No. 75-INSAG-4, Safety Culture: A report by the International Nuclear Safety Advisory Group, International Atomic Energy Agency, IAEA, 1991

80

International Collaborations on Engineered Barrier Systems: Experimental and Modeling Investigations  

Broader source: Energy.gov [DOE]

International research collaborations on deep geological disposition of nuclear waste are a key aspect of the nations strategy to investigate disposal design concepts in geologic settings...

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON NUCLEAR PHYSICS  

E-Print Network [OSTI]

STRUCTURE OF NUCLEAR REACTION INDUCED BY LOW ENERGY DEUTERONin the nuclear reaction induced by low energy deuteron on

Saxon, D.S.

2010-01-01T23:59:59.000Z

82

International Framework for Nuclear Energy Cooperation (IFNEC) Expert meetings in Romania  

Broader source: Energy.gov [DOE]

Earlier this month, Edward McGinnis, Deputy Assistant Secretary for International Nuclear Energy Policy and Cooperation, traveled to Bucharest, Romania to take part in the International Framework for Nuclear Energy Cooperation (IFNEC) Expert meetings. Mr. McGinnis serves as Chair of the IFNEC Steering Group. The Expert meetings were broken down into three meetings 1) Reliable Nuclear Fuel Services Working Group (RNFSWG), 2) Infrastructure Development Working Group (IDWG) meeting and 3) an IFNEC Steering Group meeting.

83

Infrastructure development assistance modeling for nuclear power plant  

SciTech Connect (OSTI)

The purpose of this paper is to develop a model, a general frame to be utilized in assisting newcomer countries to start a nuclear power program. A nuclear power plant project involves technical complexity and high level of investment with long duration. Considering newcomers are mostly developing countries that lack the national infrastructure, key infrastructure issues may constitute the principal constraints to the development of a nuclear power program. In this regard, it is important to provide guidance and support to set up an appropriate infrastructure when we help them with the first launch of nuclear power plant project. To date, as a sole nuclear power generation company, KHNP has been invited many times to mentor or assist newcomer countries for their successful start of a nuclear power program since Republic of Korea is an exemplary case of a developing country which began nuclear power program from scratch and became a major world nuclear energy country in a short period of time. Through hosting events organized to aid newcomer countries' initiation of nuclear power projects, difficulties have been recognized. Each event had different contents according to circumstances because they were held as an unstructured and one-off thing. By developing a general model, we can give more adequate and effective aid in an efficient way. In this paper, we created a model to identify necessary infrastructures at the right stage, which was mainly based on a case of Korea. Taking into account the assistance we received from foreign companies and our own efforts for technological self-reliance, we have developed a general time table and specified activities required to do at each stage. From a donor's perspective, we explored various ways to help nuclear infrastructure development including technical support programs, training courses, and participating in IAEA technical cooperation programs on a regular basis. If we further develop the model, the next task would be to make the model more sophisticated as a 'semi-tailored model' so that it can be applied to a certain country reflecting its unique conditions. In accordance with its degree of established infrastructure, we can adjust or modify the model. Despite lots of benefits of using this model, there remain limitations such as time and budget constraints. These problems, however, can be addressed by cooperating with international organization such as the IAEA and other companies that share the same goal of helping newcomer countries introduce nuclear power. (authors)

Park, J. H.; Hwang, K.; Park, K. M.; Kim, S. W.; Lee, S. M. [Korea Hydro and Nuclear Power Co., LTD, 23, 106 gil, Yeongdong-daero, Gangnam-gu, 153-791 (Korea, Republic of)

2012-07-01T23:59:59.000Z

84

Nuclear talks in Austria International representatives will meet in Vienna on Saturday to discuss a  

E-Print Network [OSTI]

Nuclear talks in Austria International representatives will meet in Vienna on Saturday to discuss a controversial nuclear fusion plan. The technical meeting of experts is intended to pave the way of nuclear fusion say it provides an attractive long-term energy option, because the basic materials needed

85

Safety Reports Series No. 11, Developing Safety Culture in Nuclear Activities: Practical Suggestions to Assist Progress, International Atomic Energy Agency  

Broader source: Energy.gov [DOE]

Safety Reports Series No. 11, Developing Safety Culture in Nuclear Activities: Practical Suggestions to Assist Progress, International Atomic Energy Agency

86

Modeling Nuclear Properties with Support Vector Machines  

E-Print Network [OSTI]

We have made initial studies of the potential of support vector machines (SVM) for providing statistical models of nuclear systematics with demonstrable predictive power. Using SVM regression and classification procedures, we have created global models of atomic masses, beta-decay halflives, and ground-state spins and parities. These models exhibit performance in both data-fitting and prediction that is comparable to that of the best global models from nuclear phenomenology and microscopic theory, as well as the best statistical models based on multilayer feedforward neural networks.

Haochen Li; J. W. Clark; E. Mavrommatis; S. Athanassopoulos; K. A. Gernoth

2006-03-21T23:59:59.000Z

87

An approximate internal model principle: Applications to nonlinear models of  

E-Print Network [OSTI]

that the system has an internal model in the feedback loop. In this paper we relax the requirement is to achieve adaptation include blood calcium regulation (El-Samad et al. 2002), neuronal control

Sontag, Eduardo

88

Safeguards Guidance Document for Designers of Commercial Nuclear Facilities: International Nuclear Safeguards Requirements and Practices For Uranium Enrichment Plants  

SciTech Connect (OSTI)

This report is the second in a series of guidelines on international safeguards requirements and practices, prepared expressly for the designers of nuclear facilities. The first document in this series is the description of generic international nuclear safeguards requirements pertaining to all types of facilities. These requirements should be understood and considered at the earliest stages of facility design as part of a new process called Safeguards-by-Design. This will help eliminate the costly retrofit of facilities that has occurred in the past to accommodate nuclear safeguards verification activities. The following summarizes the requirements for international nuclear safeguards implementation at enrichment plants, prepared under the Safeguards by Design project, and funded by the U.S. Department of Energy (DOE) National Nuclear Security Administration (NNSA), Office of NA-243. The purpose of this is to provide designers of nuclear facilities around the world with a simplified set of design requirements and the most common practices for meeting them. The foundation for these requirements is the international safeguards agreement between the country and the International Atomic Energy Agency (IAEA), pursuant to the Treaty on the Non-proliferation of Nuclear Weapons (NPT). Relevant safeguards requirements are also cited from the Safeguards Criteria for inspecting enrichment plants, found in the IAEA Safeguards Manual, Part SMC-8. IAEA definitions and terms are based on the IAEA Safeguards Glossary, published in 2002. The most current specification for safeguards measurement accuracy is found in the IAEA document STR-327, International Target Values 2000 for Measurement Uncertainties in Safeguarding Nuclear Materials, published in 2001. For this guide to be easier for the designer to use, the requirements have been restated in plainer language per expert interpretation using the source documents noted. The safeguards agreement is fundamentally a legal document. As such, it is written in a legalese that is understood by specialists in international law and treaties, but not by most outside of this field, including designers of nuclear facilities. For this reason, many of the requirements have been simplified and restated. However, in all cases, the relevant source document and passage is noted so that readers may trace the requirement to the source. This is a helpful living guide, since some of these requirements are subject to revision over time. More importantly, the practices by which the requirements are met are continuously modernized by the IAEA and nuclear facility operators to improve not only the effectiveness of international nuclear safeguards, but also the efficiency. As these improvements are made, the following guidelines should be updated and revised accordingly.

Robert Bean; Casey Durst

2009-10-01T23:59:59.000Z

89

NUCLEAR ENERGY SYSTEM COST MODELING  

SciTech Connect (OSTI)

The U.S. Department of Energys Fuel Cycle Technologies (FCT) Program is preparing to perform an evaluation of the full range of possible Nuclear Energy Systems (NES) in 2013. These include all practical combinations of fuels and transmuters (reactors and sub-critical systems) in single and multi-tier combinations of burners and breeders with no, partial, and full recycle. As part of this evaluation, Levelized Cost of Electricity at Equilibrium (LCAE) ranges for each representative system will be calculated. To facilitate the cost analyses, the 2009 Advanced Fuel Cycle Cost Basis Report is being amended to provide up-to-date cost data for each step in the fuel cycle, and a new analysis tool, NE-COST, has been developed. This paper explains the innovative Island approach used by NE-COST to streamline and simplify the economic analysis effort and provides examples of LCAE costs generated. The Island approach treats each transmuter (or target burner) and the associated fuel cycle facilities as a separate analysis module, allowing reuse of modules that appear frequently in the NES options list. For example, a number of options to be screened will include a once-through uranium oxide (UOX) fueled light water reactor (LWR). The UOX LWR may be standalone, or may be the first stage in a multi-stage system. Using the Island approach, the UOX LWR only needs to be modeled once and the module can then be reused on subsequent fuel cycles. NE-COST models the unit operations and life cycle costs associated with each step of the fuel cycle on each island. This includes three front-end options for supplying feedstock to fuel fabrication (mining/enrichment, reprocessing of used fuel from another island, and/or reprocessing of this islands used fuel), along with the transmuter and back-end storage/disposal. Results of each island are combined based on the fractional energy generated by each islands in an equilibrium system. The cost analyses use the probability distributions of key parameters and employs Monte Carlo sampling to arrive at an islands cost probability density function (PDF). When comparing two NES to determine delta cost, strongly correlated parameters can be cancelled out so that only the differences in the systems contribute to the relative cost PDFs. For example, one comparative analysis presented in the paper is a single stage LWR-UOX system versus a two-stage LWR-UOX to LWR-MOX system. In this case, the first stage of both systems is the same (but with different fractional energy generation), while the second stage of the UOX to MOX system uses the same type transmuter but the fuel type and feedstock sources are different. In this case, the cost difference between systems is driven by only the fuel cycle differences of the MOX stage.

Francesco Ganda; Brent Dixon

2012-09-01T23:59:59.000Z

90

12th International Conference on Nuclear Engineering Arlington, VA, April 25-29, 2004  

E-Print Network [OSTI]

that the nuclear reactor sector has acquired over the years. Keywords: Irradiation, beam targets, high-power proton1 12th International Conference on Nuclear Engineering Arlington, VA, April 25-29, 2004 ICONE12 Laboratory, UPTON NY 11973, USA 2 Princeton University, Princeton, NJ, USA 3 KEK, Tsukuba, Japan simos

McDonald, Kirk

91

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON NUCLEAR PHYSICS  

E-Print Network [OSTI]

Cass Avenue Argonne, II linoIs 60^39 Nuclear science liasnuclear quantities of interest when their measurement involves very low radioisotope concentrations. At Argonne,

Saxon, D.S.

2010-01-01T23:59:59.000Z

92

Nuclear Fallout Models An Overview  

SciTech Connect (OSTI)

This presentation is an introduction to a full report, which is a tutorial for individuals using the products of the models reviewed.

Hodges, Matthew [UNLV

2014-10-21T23:59:59.000Z

93

The Nuclear Thomas-Fermi Model  

DOE R&D Accomplishments [OSTI]

The statistical Thomas-Fermi model is applied to a comprehensive survey of macroscopic nuclear properties. The model uses a Seyler-Blanchard effective nucleon-nucleon interaction, generalized by the addition of one momentum-dependent and one density-dependent term. The adjustable parameters of the interaction were fitted to shell-corrected masses of 1654 nuclei, to the diffuseness of the nuclear surface and to the measured depths of the optical model potential. With these parameters nuclear sizes are well reproduced, and only relatively minor deviations between measured and calculated fission barriers of 36 nuclei are found. The model determines the principal bulk and surface properties of nuclear matter and provides estimates for the more subtle, Droplet Model, properties. The predicted energy vs density relation for neutron matter is in striking correspondence with the 1981 theoretical estimate of Friedman and Pandharipande. Other extreme situations to which the model is applied are a study of Sn isotopes from {sup 82}Sn to {sup 170}Sn, and the rupture into a bubble configuration of a nucleus (constrained to spherical symmetry) which takes place when Z{sup 2}/A exceeds about 100.

Myers, W. D.; Swiatecki, W. J.

1994-08-01T23:59:59.000Z

94

NNSA summer interns tour Sandia | National Nuclear Security Administra...  

National Nuclear Security Administration (NNSA)

Rodriguez, Ashley Dyke, Richard Baca (NNSA Mentor for 2012 NNSA Intern Program), and Jordan Flynn. NNSA Sandia Site Office Facility Representative Erwin Hoo hosts the NNSA Summer...

95

Time-lag of record inputs to the international nuclear information system bibliographic database  

Science Journals Connector (OSTI)

This paper discusses the timeliness in inputting bibliographical records to international databases with a case study of the international nuclear information system bibliographic database from the inception (1970) to the year 2008. The authors have attempted to calculate the overall and average inputting time-lag of the database. The time-lags of inputting countries and international organisations are analysed separately. The study also tries to identify the nature of inputs that are responsible for this delayed response.

E.R. Prakasan; Nita Bhaskar; K. Bhanumurthy

2011-01-01T23:59:59.000Z

96

A probabilistic model of nuclear import of proteins  

Science Journals Connector (OSTI)

......Accuracy of predicting nuclear import for independent datasets (Hawkins et al...import. We use a nuclear localization signal dataset extracted from...mouse and yeast nuclear proteomes. We establish on a smaller dataset that the model......

Ahmed M. Mehdi; Muhammad Shoaib B. Sehgal; Bostjan Kobe; Timothy L. Bailey; Mikael Bodn

2011-05-01T23:59:59.000Z

97

Nuclear curvature energy in relativistic models  

Science Journals Connector (OSTI)

The difficulties arising in the calculation of the nuclear curvature energy are analyzed in detail, especially with reference to relativistic models. It is underlined that the implicit dependence on curvature of the quantal wave functions is directly accessible only in a semiclassical framework. It is shown that also in the relativistic models quantal and semiclassical calculations of the curvature energy are in good agreement. 1996 The American Physical Society.

M. Centelles; X. Vias; P. Schuck

1996-02-01T23:59:59.000Z

98

Nuclear Decay Data in the MIRD (Medical Internal Radiation Dose) Format  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

MIRD is a database of evaluated nuclear decay data for over 2,100 radioactive nuclei. Data are extracted from ENSDF, processed by the program RadList, and used for medical internal radiation dose calculations. When using the MIRD interface, tables of nuclear and atomic radiations from nuclear decay and decay scheme drawings will be produced in the MIRD format from the Evaluated Nuclear Structure Data File (ENSDF) for the specified nuclide. Output may be either HTML-formatted tables and JPEG drawings, PostScript tables and drawings, or PDF tables and drawings.

99

RTI International Develops SSL Luminaire Reliability Model  

Broader source: Energy.gov [DOE]

With the help of DOE funding, RTI International is developing and validating accelerated life testing (ALT) methodologies and a reliability model for predicting the lifetime of integrated solid-state lighting luminaires. Since data is essential to building this model, the technical literature in the electronics and lighting communities has been extensively utilized. However, the general lack of certified information on luminaire failure modes (for both SSL luminaires and older technologies) has required that a majority of the effort during this work focus on understanding what happens during the luminaire aging process. This information is being used to identify potential failure modes, understand variations across a given product line, and ultimately determine how long testing will take.

100

Internal Stress in a Model Elasto-Plastic Fluid  

E-Print Network [OSTI]

Plastic materials can carry memory of past mechanical treatment in the form of internal stress. We introduce a natural definition of the vorticity of internal stress in a simple two-dimensional model of elasto-plastic fluids, which generates the internal stress. We demonstrate how the internal stress is induced under external loading, and how the presence of the internal stress modifies the plastic behavior.

Takeshi Ooshida; Ken Sekimoto

2005-12-03T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

. International Conference on Nuclear Knowledge Management INAC 2005 international Conference on Nuclear Knowledge Management, INAC 2005, Santos (Brazil)  

E-Print Network [OSTI]

Institute (IPEN-Brazil) barroso@ipen.br c Ph D., Head of Information Science Department Telecommunication Nuclear Atlantic Conference, Santos : Brazil (2005)" #12;R. I. RICCIARDI, A. C. O. BARROSO and J. O. BARROSO and J.-

Paris-Sud XI, Université de

102

International nuclear fuel cycle fact book. [Contains glossary  

SciTech Connect (OSTI)

As the US Department of Energy (DOE) and DOE contractors have become increasingly involved with other nations in nuclear fuel cycle and waste management cooperative activities, a need has developed for a ready source of information concerning foreign fuel cycle programs, facilities, and personnel. This Fact Book was compiled to meet that need. The information contained has been obtained from nuclear trade journals and newsletters; reports of foreign visits and visitors; CEC, IAEA, and OECD/NEA activities reports; proceedings of conferences and workshops; and so forth. Sources do not agree completely with each other, and the data listed herein does not reflect any one single source but frequently is a consolidation/combination of information. Lack of space as well as the intent and purpose of the Fact Book limit the given information to that pertaining to the Nuclear Fuel Cycle and to data considered of primary interest or most helpful to the majority of users.

Leigh, I.W.; Lakey, L.T.; Schneider, K.J.; Silviera, D.J.

1987-01-01T23:59:59.000Z

103

Proceedings of GLOBAL 2013: International Nuclear Fuel Cycle Conference - Nuclear Energy at a Crossroads  

SciTech Connect (OSTI)

The Global conference is a forum for the discussion of the scientific, technical, social and regulatory aspects of the nuclear fuel cycle. Relevant topics include global utilization of nuclear energy, current fuel cycle technologies, advanced reactors, advanced fuel cycles, nuclear nonproliferation and public acceptance.

NONE

2013-07-01T23:59:59.000Z

104

Nuclear Energy Level Argument for a Spheroidal Nuclear Model  

Science Journals Connector (OSTI)

Recently there has been notable success, particularly by Maria Mayer, in explaining many nuclear phenomena including spins, magnetic moments, isomeric states, etc. on the basis of a single particle model for the separate nucleons in a spherical nucleus. The spherical model, however, seems incapable of explaining the observed large quadrupole moments of nuclei. In this paper it is shown that an extension of the logic of this model leads to the prediction that greater stability is obtained for a spheroidal than for a spherical nucleus of the same volume, when reasonable assumptions are made concerning the variation of the energy terms on distortion. The predicted quadrupole moment variation with odd A is in general agreement with the experimental values as concerns variation with A, but are even larger than the experimental values. Since the true situation probably involves considerable "dilution" of the extreme single particle model, it is encouraging that the present predictions are larger rather than smaller than the experimental results. A solution is given for the energy levels of a particle in a spheroidal box.

James Rainwater

1950-08-01T23:59:59.000Z

105

Utility system integration and optimization models for nuclear power management  

E-Print Network [OSTI]

A nuclear power management model suitable for nuclear utility systems optimization has been developed for use in multi-reactor fuel management planning over periods of up to ten years. The overall utility planning model ...

Deaton, Paul Ferris

1973-01-01T23:59:59.000Z

106

EU signs ITER deal Negotiations on the ITER international nuclear  

E-Print Network [OSTI]

parties will contribute up to ten per cent. European Greens, fiercely opposed to nuclear energy, have fusion as a future clean energy source. "Energy is an issue of concern to all of us, and we all hope that what at one time seemed a far off goal - fusion as a viable energy source - is now a step nearer

107

International Environmental Modelling and Software Society (iEMSs) 2010 International Congress on Environmental Modelling and Software  

E-Print Network [OSTI]

on Environmental Modelling and Software Modelling for Environment's Sake, Fifth Biennial Meeting, Ottawa, CanadaInternational Environmental Modelling and Software Society (iEMSs) 2010 International Congress-based model of human-environment interaction and conflict in East Africa using the MASON agent

George Mason University

108

Nuclear response beyond the Fermi gas model  

E-Print Network [OSTI]

The Fermi gas model, while providing a reasonable qualitative description of the continuum nuclear response, does not include the effects of dynamical nucleon-nucleon correlations in the initial and final states, that have long been recognized to play a critical role in specific kinematical regions. We review a many-body approach in which these effects are consistently taken into account and discuss the results of a calculation of the quasielastic neutrino-oxygen cross section as an illustrative example.

Omar Benhar

2003-07-14T23:59:59.000Z

109

Spent nuclear fuel policies in historical perspective: An international comparison  

Science Journals Connector (OSTI)

The purpose of this article is to explain why the world's nuclear power countries differ from each other with respect to their spent nuclear fuel (SNF) policies. The emergence and evolution of three principal SNF approaches are analyzed: direct disposal, reprocessing and SNF export. Five broad explanatory factors are identified and discussed in relation to the observed differences in policy outcomes: military ambitions and non-proliferation, technological culture, political culture and civil society, geological conditions, and energy policy. SNF policy outcomes can generally be seen to result from a complex interaction between these broad factors, but it is also possible to discern a number of important patterns. To the extent that the five factors may undergo far-reaching changes in the future, the historical experience of how they have shaped SNF policies also give a hint of possible future directions in SNF policymaking around the world.

Per Hgselius

2009-01-01T23:59:59.000Z

110

International control of tritium to prevent horizontal proliferation and to foster nuclear disarmament  

SciTech Connect (OSTI)

In this paper, an approach to control tritium systematically on the international level is proposed. The first goal is to prevent the military use of tritium in states other than the five recognized nuclear weapons states. An {open_quotes}International Tritium Control System{close_quotes} (ITCS) would control all civilian facilities producing or handling tritium. The second goal is to restrict the availability of fresh tritium supplies for nuclear weapons programs as a means to avoid vertical proliferation in states that possess nuclear weapons, and as a step towards complete nuclear disarmament. This can be achieved by including tritium in a future weapons-usable materials production cutoff agreement and the approach proposed here is called an {open_quotes}Integrated Cutoff{close_quotes} (ICO). The simultaneous implementation of the ITCS and ICO aims at avoiding any new discrimination against non-nuclear weapon states. This paper will discuss the possible political and technical modalities to achieve both goals. The rules and decision making procedures are outlined for both control approaches and the implications for the nuclear non-proliferation regime are shown. Various control tasks are derived from a comprehensive analysis covering all diversion paths which can yield more than one gram of tritium within one year. In the appendix to this paper, the impact of a tritium shortage on the U.S. nuclear arsenal is illuminated. The extreme case of complete elimination of all tritium would result in a large yield reductions of the arsenal.

Kalinowski, M.B.; Colschen, L.C. [Institut fuer Kernphysik, Darmstadt (Germany)

1995-11-01T23:59:59.000Z

111

International Environmental Modelling and Software Society (iEMSs) 2012 International Congress on Environmental Modelling and Software  

E-Print Network [OSTI]

International Environmental Modelling and Software Society (iEMSs) 2012 International Congress on Environmental Modelling and Software Managing Resources of a Limited Planet, Sixth Biennial Meeting, Leipzig://www.iemss.org/society/index.php/iemss-2012-proceedings Developing and integrating a simulation model of water resources supply and demand

Boyer, Edmond

112

Covert plant detection - Excerpt from Nuclear Engineering International (Nov. 2007)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

NOVEMBER 2007 NOVEMBER 2007 I N T E R N A T I O N A L 6 www.neimagazine.com [ .ol52 No 640 November 2007 CONTENTS b . . - . 4 First full COL application; Scotland rejects new build; EPR state aid ruling; GNEP swells; U S risk ' urance conditional agreement - . - - - - -- - -- - - s I N T E R N A T I O N A L I COMPANY NEWS 6 The latest company news and contract results Editor: COMMENT > . 12 Developing nations must take the lead on new Editorial Assistants: Tracey Honney Elaine Sneath nuclear build 14 AECL has optimised instrumentation for its ACR-1000 reactor I Group Advertisement Mana Scott Calvin European Sales Executive: Journal Secretary: ' - I . i RADIATION MONITORING & ALARA . % * - 17 lonising radiation for medical diagnosis contributes 90% of the total exposure of the UK population to

113

Porous nuclear fuel element with internal skeleton for high-temperature gas-cooled nuclear reactors  

DOE Patents [OSTI]

Porous nuclear fuel elements for use in advanced high temperature gas-cooled nuclear reactors (HTGR's), and to processes for fabricating them. Advanced uranium bi-carbide, uranium tri-carbide and uranium carbonitride nuclear fuels can be used. These fuels have high melting temperatures, high thermal conductivity, and high resistance to erosion by hot hydrogen gas. Tri-carbide fuels, such as (U,Zr,Nb)C, can be fabricated using chemical vapor infiltration (CVI) to simultaneously deposit each of the three separate carbides, e.g., UC, ZrC, and NbC in a single CVI step. By using CVI, the nuclear fuel may be deposited inside of a highly porous skeletal structure made of, for example, reticulated vitreous carbon foam.

Youchison, Dennis L.; Williams, Brian E.; Benander, Robert E.

2013-09-03T23:59:59.000Z

114

NEAMS: The Nuclear Energy Advanced Modeling and Simulation Program  

Broader source: Energy.gov (indexed) [DOE]

NEAMS: The Nuclear Energy Advanced NEAMS: The Nuclear Energy Advanced Modeling and Simulation Program The Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program is developing a simulation tool kit using leading-edge computational methods that will accelerate the development and deployment of nuclear power technologies that employ enhanced safety and security features, produce power more cost-effectively, and utilize natural resources more efficiently. The NEAMS ToolKit

115

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Accepted June 2008 HYDROGEN STORAGE FOR MIXED WIND-NUCLEAR POWER PLANTS IN  

E-Print Network [OSTI]

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY Accepted June 2008 1 HYDROGEN STORAGE FOR MIXED WIND-NUCLEAR evaluation of hydrogen production and storage for a mixed wind-nuclear power plant considering some new of a combined nuclear-wind-hydrogen system is discussed first, where the selling and buying of electricity

Cañizares, Claudio A.

116

Choosing a standard reactor: International competition and domestic politics in Chinese nuclear policy  

Science Journals Connector (OSTI)

China has ambitious plans to expand its nuclear power capacity. One of the policy goals that high-level policymakers have desired is to base the nuclear program on a standardized reactor design. However, this has not materialized so far. By examining its nuclear reactor choices for individual projects, we argue that Chinas policymaking process has been greatly influenced by international competition and domestic politics. Multiple international nuclear vendors are intent upon maintaining their respective niches in the expanding Chinese reactor market, and they have used various forms of economic and political pressure to achieve their objectives. On the other hand, Chinas policymaking process is fragmented and the shifting power balances among powerful domestic actors do not allow a fixed path to be followed. Further, because of the high costs and potential profits involved, nuclear reactor choices in China have been driven not just by technical considerations but also by foreign and trade policy objectives. All of these make it unlikely that China will standardize the reactor type it constructs in the near future.

M.V. Ramana; Eri Saikawa

2011-01-01T23:59:59.000Z

117

Nuclear Energy Advanced Modeling and Simulation (NEAMS) Software...  

Broader source: Energy.gov (indexed) [DOE]

Software Verification and Validation (V&V) Plan Requirements Nuclear Energy Advanced Modeling and Simulation (NEAMS) Software Verification and Validation (V&V) Plan Requirements...

118

Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program...  

Broader source: Energy.gov (indexed) [DOE]

Program Plan Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program Plan The NEAMS program plan includes information on the program vision, objective, scope, schedule and...

119

Low-temperature Swelling in LWR Internal Components: Current Data and Modeling Assessment  

Broader source: Energy.gov (indexed) [DOE]

LTR-2012/390 LTR-2012/390 Low-temperature Swelling in LWR Internal Components: Current Data and Modeling Assessment R. E. Stoller, A. V. Barashev, and S. I. Golubov Materials Science and Technology Division Oak Ridge National Laboratory Prepared for: Light Water Reactor Sustainability Program Office of Nuclear Energy, Science and Technology U.S. Department of Energy September 2012 ORNL/LTR-2012/390 1 Low-temperature Swelling in LWR Internal Components: Current Data and Modeling Assessment Abstract Recent experimental observations have made it clear that cavity formation can occur in light-water reactor internal components fabricated from austenitic stainless during the course of their service life. In order to assess the potential for cavity swelling

120

Numerical Modeling of Internal Tide Generation along the Hawaiian Ridge  

Science Journals Connector (OSTI)

Internal M2 tides near Hawaii are investigated with a two-dimensional, two-layer numerical model. It is seen that along the Hawaiian Ridge barotropic tidal energy is transformed into baroclinic internal tides that propagate in both northeast and ...

S. K. Kang; M. G. G. Foreman; W. R. Crawford; J. Y. Cherniawsky

2000-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Study on The Effect of Regenerative System on Power Type Relative Internal Efficiency of Nuclear Steam Turbine  

Science Journals Connector (OSTI)

Nuclear steam turbine use wet steam as working medium, which is unable to determine the enthalpy drop type relative internal efficiency through exhaust enthalpy of steam, but the power type relative internal efficiency avoids this question. This paper introduced the calculate method of power type relative internal efficience, and then took a 900MW nuclear steam turbine for example, calculated the power type relative internal efficiency when the factors of regenerative system are changed. The result shows that when the factors of regenerative system are changed in a large range, the power type relative internal efficiency is nearly changeless, so the effect of regenerative system on relative internal efficiency can be neglected. At last, the independence between relative internal efficiency and ideal cycle heat efficiency is calculated and analyzed.

Yong Li; Chao Wang

2012-01-01T23:59:59.000Z

122

Model-Based Calculations of the Probability of a Country's Nuclear Proliferation Decisions  

SciTech Connect (OSTI)

The first nuclear weapon was detonated in August 1945 over Japan to end World War II. During the past six decades, the majority of the world's countries have abstained from acquiring nuclear weapons. However, a number of countries have explored the nuclear weapons option, 23 in all. Among them, 14 countries have dropped their interest in nuclear weapons after initiating some efforts. And nine of them today possess nuclear weapons. These countries include the five nuclear weapons states - U.S., Russia, U.K., France, and China - and the four non- NPT member states - Israel, India, Pakistan, and North Korea. Many of these countries initially used civilian nuclear power technology development as a basis or cover for their military program. Recent proliferation incidents in Iraq, Iran, and North Korea brought the world together to pay much attention to nuclear nonproliferation. With the expected surge in the use of nuclear energy for power generation by developing countries, the world's nuclear nonproliferation regime needs to be better prepared for potential future challenges. For the world's nuclear nonproliferation regime to effectively cope with any future proliferation attempts, early detection of potentially proliferation-related activities is highly desirable. Early detection allows the international community to respond and take necessary actions - ideally using political and diplomatic influences without resorting to harsh measures such as sanctions or military actions. In this regard, a capability to quantitatively predict the chance of a country's nuclear proliferation intent or activities is of significant interest. There have been various efforts in the research community to understand the determinants of nuclear proliferation and develop quantitative tools to predict nuclear proliferation events. These efforts have shown that information about the political issues surrounding a country's security along with economic development data can be useful to explain the occurrences of proliferation decisions. However, predicting major historical proliferation events using model-based predictions has been unreliable. Nuclear proliferation decisions by a country is affected by three main factors: (1) technology; (2) finance; and (3) political motivation [1]. Technological capability is important as nuclear weapons development needs special materials, detonation mechanism, delivery capability, and the supporting human resources and knowledge base. Financial capability is likewise important as the development of the technological capabilities requires a serious financial commitment. It would be difficult for any state with a gross national product (GNP) significantly less than that of about $100 billion to devote enough annual governmental funding to a nuclear weapon program to actually achieve positive results within a reasonable time frame (i.e., 10 years). At the same time, nuclear proliferation is not a matter determined by a mastery of technical details or overcoming financial constraints. Technology or finance is a necessary condition but not a sufficient condition for nuclear proliferation. At the most fundamental level, the proliferation decision by a state is controlled by its political motivation. To effectively address the issue of predicting proliferation events, all three of the factors must be included in the model. To the knowledge of the authors, none of the exiting models considered the 'technology' variable as part of the modeling. This paper presents an attempt to develop a methodology for statistical modeling and predicting a country's nuclear proliferation decisions. The approach is based on the combined use of data on a country's nuclear technical capability profiles economic development status, security environment factors and internal political and cultural factors. All of the information utilized in the study was from open source literature. (authors)

Li, Jun; Yim, Man-Sung; McNelis, David N. [Department of Nuclear Engineering North Carolina State University (United States)

2007-07-01T23:59:59.000Z

123

Review of the International Atomic Energy Agency International database on reactor pressure vessel materials and US Nuclear Regulatory Commission/Oak Ridge National Laboratory embrittlement data base  

SciTech Connect (OSTI)

The International Atomic Energy Agency (IAEA) has supported neutron radiation effects information exchange through meetings and conferences since the mid-1960s. Through an International Working Group on Reliability of Reactor Pressure Components, information exchange and research activities were fostered through the Coordinated Research Program (CRP) sponsored by the IAEA. The final CRP meeting was held in November 1993, where it was recommended that the IAEA coordinate the development of an International Database on Reactor Pressure Vessel Material (IDRPVM) as the first step in generating an International Database on Aging Management. The purpose of this study was to provide special technical assistance to the NRC in monitoring and evaluating the IAEA activities in developing the IAEA IDRPVM, and to compare the IDRPVM with the Nuclear Regulatory Commission (NRC) - Oak Ridge National Laboratory (ORNL) Power Reactor Embrittlement Data Base (PR-EDB) and provide recommendations for improving the PR-EDB. A first test version of the IDRPVM was distributed at the First Meeting of Liaison Officers to the IAEA IDRPVM, in November 1996. No power reactor surveillance data were included in this version; the testing data were mainly from CRP Phase III data. Therefore, because of insufficient data and a lack of power reactor surveillance data received from the IAEA IDRPVM, the comparison is made based only on the structure of the IDRPVM. In general, the IDRPVM and the EDB have very similar data structure and data format. One anticipates that because the IDRPVM data will be collected from so many different sources, quality assurance of the data will be a difficult task. The consistency of experimental test results will be an important issue. A very wide spectrum of material characteristics of RPV steels and irradiation environments exists among the various countries. Hence the development of embrittlement prediction models will be a formidable task. 4 refs., 2 figs., 4 tabs.

Wang, J.A.; Kam, F.B.K.

1998-02-01T23:59:59.000Z

124

Modeling and Simulation for Nuclear Reactors Hub | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

Modeling and Simulation for Nuclear Reactors Hub Modeling and Simulation for Nuclear Reactors Hub Modeling and Simulation for Nuclear Reactors Hub August 1, 2010 - 4:20pm Addthis Scientists and engineers are working to help the nuclear industry make reactors more efficient through computer modeling and simulation. Scientists and engineers are working to help the nuclear industry make reactors more efficient through computer modeling and simulation. The Department's Energy Innovation Hubs are helping to advance promising areas of energy science and engineering from the earliest stages of research to the point of commercialization where technologies can move to the private sector by bringing together leadings scientists to collaborate on critical energy challenges. The Energy Innovation Hubs aim to develop innovation through a unique

125

Propagation of uncertainties in the nuclear DFT models  

E-Print Network [OSTI]

Parameters of the nuclear density functional theory (DFT) models are usually adjusted to experimental data. As a result they carry certain theoretical error, which, as a consequence, carries out to the predicted quantities. In this work we address the propagation of theoretical error, within the nuclear DFT models, from the model parameters to the predicted observables. In particularly, the focus is set on the Skyrme energy density functional models.

Markus Kortelainen

2014-09-04T23:59:59.000Z

126

Self-organized Criticality Model for Ocean Internal Waves  

Science Journals Connector (OSTI)

In this paper, we present a simple spring-block model for ocean internal waves based on the self-organized criticality (SOC). The oscillations of the water blocks in the model display power-law behavior with an exponent of 2 in the frequency domain, which is similar to the current and sea water temperature spectra in the actual ocean and the universal Garrett and Munk deep ocean internal wave model [Geophysical Fluid Dynamics 2 (1972) 225; J. Geophys. Res. 80 (1975) 291]. The influence of the ratio of the driving force to the spring coefficient to SOC behaviors in the model is also discussed.

Wang Gang; Lin Min; Qiao Fang-Li; Hou Yi-Jun

2009-01-01T23:59:59.000Z

127

International Conference on Nuclear Thermal Hydraulics, Operations and Safety (NUTHOS-6) Nara, Japan, October 4-8, 2004.  

E-Print Network [OSTI]

for assuring quality of software. In the area of nuclear power plant control systems, testing on softwareThe 6th International Conference on Nuclear Thermal Hydraulics, Operations and Safety (NUTHOS-6) Nara, Japan, October 4-8, 2004. Paper ID. N6P298 Direct Control Flow Testing on Function Block Diagrams

128

Modeling fabrication of nuclear components: An integrative approach  

SciTech Connect (OSTI)

Reduction of the nuclear weapons stockpile and the general downsizing of the nuclear weapons complex has presented challenges for Los Alamos. One is to design an optimized fabrication facility to manufacture nuclear weapon primary components in an environment of intense regulation and shrinking budgets. This dissertation presents an integrative two-stage approach to modeling the casting operation for fabrication of nuclear weapon primary components. The first stage optimizes personnel radiation exposure for the casting operation layout by modeling the operation as a facility layout problem formulated as a quadratic assignment problem. The solution procedure uses an evolutionary heuristic technique. The best solutions to the layout problem are used as input to the second stage - a simulation model that assesses the impact of competing layouts on operational performance. The focus of the simulation model is to determine the layout that minimizes personnel radiation exposures and nuclear material movement, and maximizes the utilization of capacity for finished units.

Hench, K.W.

1996-08-01T23:59:59.000Z

129

BFS, a Legacy to the International Reactor Physics, Criticality Safety, and Nuclear Data Communities  

SciTech Connect (OSTI)

Interest in high-quality integral benchmark data is increasing as efforts to quantify and reduce calculational uncertainties accelerate to meet the demands of next generation reactor and advanced fuel cycle concepts. Two Organization for Economic Cooperation and Development (OECD) Nuclear Energy Agency (NEA) activities, the International Criticality Safety Benchmark Evaluation Project (ICSBEP), initiated in 1992, and the International Reactor Physics Experiment Evaluation Project (IRPhEP), initiated in 2003, have been identifying existing integral experiment data, evaluating those data, and providing integral benchmark specifications for methods and data validation for nearly two decades. Thus far, 14 countries have contributed to the IRPhEP, and 20 have contributed to the ICSBEP. Data provided by these two projects will be of use to the international reactor physics, criticality safety, and nuclear data communities for future decades The Russian Federation has been a major contributor to both projects with the Institute of Physics and Power Engineering (IPPE) as the major contributor from the Russian Federation. Included in the benchmark specifications from the BFS facilities are 34 critical configurations from BFS-49, 61, 62, 73, 79, 81, 97, 99, and 101; spectral characteristics measurements from BFS-31, 42, 57, 59, 61, 62, 73, 97, 99, and 101; reactivity effects measurements from BFS-62-3A; reactivity coefficients and kinetics measurements from BFS-73; and reaction rate measurements from BFS-42, 61, 62, 73, 97, 99, and 101.

J. Blair Briggs; Anatoly Tsibulya; Yevgeniy Rozhikhin

2012-03-01T23:59:59.000Z

130

International Legal Framework for Denuclearization and Nuclear Disarmament Present Situation and Prospects  

SciTech Connect (OSTI)

This thesis is the culminating project for my participation in the OECD NEA International School of Nuclear Law. This paper will begin by providing a historical background to current disarmament and denuclearization treaties. This paper will discuss the current legal framework based on current and historical activities related to denuclearization and nuclear disarmament. Then, it will propose paths forward for the future efforts, and describe the necessary legal considerations. Each treaty or agreement will be examined in respect to its requirements for: 1) limitations and implementation; 2) and verification and monitoring. Then, lessons learned in each of the two areas (limitations and verification) will be used to construct a proposed path forward at the end of this paper.

Gastelum, Zoe N.

2012-12-16T23:59:59.000Z

131

Development of nuclear materials accounting for international safeguards: The past, the present, the future  

SciTech Connect (OSTI)

Nuclear materials accountancy was introduced as a primary safeguards measure in international safeguards from the inception of the EURATOM safeguards directorate in 1959 and IAEA safeguards in 1961 with the issuance of INFCIRC 26. As measurement technology evolved and safeguarded facilities increased in both number and size, measurement methodology requirements increased as reflected in INFCIRC 66 (Rev 2.) in 1968 and later in INFCIRC 153 in 1972. Early measurements relied heavily on chemical analysis, but in the 1960s it evolved more and more toward nondestructive assay. Future nuclear materials accountancy systems will increase in complexity, driven by larger and more complex facilities; more stringent health, safety, and environmental considerations; and unattended automation in facility operations. 15 refs.

Markin, J.T.; Augustson, R.H.; Eccleston, G.W.; Hakkila, E.A.

1991-01-01T23:59:59.000Z

132

Qualification of Programmable Electronic System (PES) equipment based on international nuclear I and C standards  

SciTech Connect (OSTI)

Nuclear power plants (NPPs) are increasingly faced with the challenge of qualifying procured equipment, sub-components, and systems that contain digital programmed electronics for use in safety-related applications. Referred to as a 'programmable electronic system' (PES), such equipment typically contains both complex logic that is vulnerable to systematic design faults, and low voltage electronics hardware that is subject to random faults. Procured PES products or components are often only commercial grade, yet can offer reliable cost effective alternatives to custom-designed or nuclear qualified equipment, provided they can be shown to meet the quality assurance, functional safety, environmental, and reliability requirements of a particular application. The process of confirming this is referred to as application-specific product qualification (ASPQ) and can be challenging and costly. This paper provides an overview of an approach that has been developed at Atomic Energy Canada Limited (AECL) and successfully applied to PES equipment intended for use in domestic Candu R 6 nuclear power plants and special purpose reactors at Chalk River Laboratories. The approach has evolved over the past decade and has recently been adapted to be consistent with, and take advantage of new standards that are applicable to nuclear safety-related I and C systems. Also discussed are how recognized third-party safety-certifications of PES equipment to International Electrotechnical Commission (IEC) standards, and the assessment methods employed, may be used to reduce ASPQ effort. (authors)

De Grosbois, J.; Hepburn, G. A.; Olmstead, R. [Atomic Energy Canada Ltd., 2251 Speakman Drive, Mississauga, Ont. L5K 1B2 (Canada); Goble, W. [Exida, 64 N. Main St., Sellersville, PA 18960 (United States); Kumar, V. [Carleton Univ., 1125 Colonel By Drive, Ottawa, Ont. K1S 5B6 (Canada)

2006-07-01T23:59:59.000Z

133

National Nuclear Data Center  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Internal Radiation Dose Evaluated Nuclear (reaction) Data File Experimental nuclear reaction data Sigma Retrieval & Plotting Nuclear structure & decay Data Nuclear Science References Experimental Unevaluated Nuclear Data List Evaluated Nuclear Structure Data File NNDC databases Ground and isomeric states properties Nuclear structure & decay data journal Nuclear reaction model code Tools and Publications US Nuclear Data Program Cross Section Evaluation Working Group Nuclear data networks Basic properties of atomic nuclei Parameters & thermal values Basic properties of atomic nuclei Internal Radiation Dose Evaluated Nuclear (reaction) Data File Experimental nuclear reaction data Sigma Retrieval & Plotting Nuclear structure & decay Data Nuclear Science References Experimental Unevaluated Nuclear Data List Evaluated Nuclear Structure Data File NNDC databases Ground and isomeric states properties Nuclear structure & decay data journal Nuclear reaction model code Tools and Publications US Nuclear Data Program Cross Section Evaluation Working Group Nuclear data networks Basic properties of atomic nuclei Parameters & thermal values Basic properties of atomic nuclei Homepage BNL Home Site Index - Go USDNP and CSEWG November 18-22! USNDP CSEWG Agenda Thanks for attending! EXFOR 20,000 Milestone EXFOR Milestone 20,000 experimental works are now in the EXFOR database!

134

Automatic code generation enables nuclear gradient computations for fully internally contracted multireference theory  

E-Print Network [OSTI]

Analytical nuclear gradients for fully internally contracted complete active space second-order perturbation theory (CASPT2) are reported. This implementation has been realized by an automated code generator that can handle spin-free formulas for the CASPT2 energy and its derivatives with respect to variations of molecular orbitals and reference coefficients. The underlying complete active space self-consistent field and the so-called Z-vector equations are solved using density fitting. With full internal contraction the size of first-order wave functions scales polynomially with the number of active orbitals. The CASPT2 gradient program and the code generator are both publicly available. This work enables the CASPT2 geometry optimization of molecules as complex as those investigated by respective single-point calculations.

MacLeod, Matthew K

2015-01-01T23:59:59.000Z

135

Modelling power output at nuclear power plant by neural networks  

Science Journals Connector (OSTI)

In this paper, we propose two different neural network (NN) approaches for industrial process signal forecasting. Real data is available for this research from boiling water reactor type nuclear power reactors. NNs are widely used for time series prediction, ... Keywords: evaluation methods, model input selection, neural networks, nuclear power plant, one-step ahead prediction

Jaakko Talonen; Miki Sirola; Eimontas Augilius

2010-09-01T23:59:59.000Z

136

Proceedings of the Fourth International Workshop on Software Engineering and Artificial Intelligence for High Energy and Nuclear Physics, eds. B. Denby and D. PerretGallix, International Journal of Modern  

E-Print Network [OSTI]

Intelligence for High Energy and Nuclear Physics, eds. B. Denby and D. Perret­Gallix, International Journal on Software Engineering and Artificial Intelligence for High Energy and Nuclear Physics, Pisa, Italy, April 3

Peterson, Carsten

137

LANL researchers use computer modeling to study HIV | National Nuclear  

National Nuclear Security Administration (NNSA)

researchers use computer modeling to study HIV | National Nuclear researchers use computer modeling to study HIV | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > LANL researchers use computer modeling to study HIV LANL researchers use computer modeling to study HIV Posted By Office of Public Affairs Los Alamos National Laboratory researchers are investigating the complex

138

The optical model potential of the $?$ hyperon in nuclear matter  

E-Print Network [OSTI]

We present our attempts to determine the optical model potential $U_\\Sigma = V_\\Sigma -iW_\\Sigma$ of the $\\Sigma$ hyperon in nuclear matter. We analyze the following sources of information on $U_\\Sigma$: $\\Sigma N$ scattering, $\\Sigma^-$ atoms, and final state interaction of $\\Sigma$ hyperons in the $(\\pi,K^+)$ and $(K^-.\\pi)$ reactions on nuclear targets. We conclude that $V_\\Sigma$ is repulsive inside the nucleus and has a shallow a tractive pocket at the nuclear surface. These features of $V_\\Sigma$ are consistent with the Nijmegen model F of the hyperon-nucleon interaction.

J. Dabrowski; J. Rozynek

2009-11-17T23:59:59.000Z

139

Reactor Vessel and Reactor Vessel Internals Segmentation at Zion Nuclear Power Station - 13230  

SciTech Connect (OSTI)

Zion Nuclear Power Station (ZNPS) is a dual-unit Pressurized Water Reactor (PWR) nuclear power plant located on the Lake Michigan shoreline, in the city of Zion, Illinois approximately 64 km (40 miles) north of Chicago, Illinois and 67 km (42 miles) south of Milwaukee, Wisconsin. Each PWR is of the Westinghouse design and had a generation capacity of 1040 MW. Exelon Corporation operated both reactors with the first unit starting production of power in 1973 and the second unit coming on line in 1974. The operation of both reactors ceased in 1996/1997. In 2010 the Nuclear Regulatory Commission approved the transfer of Exelon Corporation's license to ZionSolutions, the Long Term Stewardship subsidiary of EnergySolutions responsible for the decommissioning of ZNPS. In October 2010, ZionSolutions awarded Siempelkamp Nuclear Services, Inc. (SNS) the contract to plan, segment, remove, and package both reactor vessels and their respective internals. This presentation discusses the tools employed by SNS to remove and segment the Reactor Vessel Internals (RVI) and Reactor Vessels (RV) and conveys the recent progress. SNS's mechanical segmentation tooling includes the C-HORCE (Circumferential Hydraulically Operated Cutting Equipment), BMT (Bolt Milling Tool), FaST (Former Attachment Severing Tool) and the VRS (Volume Reduction Station). Thermal segmentation of the reactor vessels will be accomplished using an Oxygen- Propane cutting system. The tools for internals segmentation were designed by SNS using their experience from other successful reactor and large component decommissioning and demolition (D and D) projects in the US. All of the designs allow for the mechanical segmentation of the internals remotely in the water-filled reactor cavities. The C-HORCE is designed to saw seven circumferential cuts through the Core Barrel and Thermal Shield walls with individual thicknesses up to 100 mm (4 inches). The BMT is designed to remove the bolts that fasten the Baffle Plates to the Baffle Former Plates. The FaST is designed to remove the Baffle Former Plates from the Core Barrel. The VRS further volume reduces segmented components using multiple configurations of the 38i and horizontal reciprocating saws. After the successful removal and volume reduction of the Internals, the RV will be segmented using a 'First in the US' thermal cutting process through a co-operative effort with Siempelkamp NIS Ingenieurgesellschaft mbH using their experience at the Stade NPP and Karlsruhe in Germany. SNS mobilized in the fall of 2011 to commence execution of the project in order to complete the RVI segmentation, removal and packaging activities for the first unit (Unit 2) by end of the 2012/beginning 2013 and then mobilize to the second unit, Unit 1. Parallel to the completion of the segmentation of the reactor vessel internals at Unit 1, SNS will segment the Unit 2 pressure vessel and at completion move to Unit 1. (authors)

Cooke, Conrad; Spann, Holger [Siempelkamp Nuclear Services: 5229 Sunset Blvd., (Suite M), West Columbia, SC, 29169 (United States)] [Siempelkamp Nuclear Services: 5229 Sunset Blvd., (Suite M), West Columbia, SC, 29169 (United States)

2013-07-01T23:59:59.000Z

140

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 50 (2010) 014004 (14pp) doi:10.1088/0029-5515/50/1/014004  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 50 (2010) 014004 of nuclear energy in the form of nuclear fission were established with the nuclear powered submarine Research and Energy®, 48 Oakland Street, Princeton, NJ 08540, USA E-mail: dmeade@pppl.gov Received 6 August

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141

Materials Modeling and Simulation for Nuclear Fuels (MMSNF) Workshops  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Aerial photo of Argonne National Laboratory Argonne National Laboratory University of Chicago Chicago Photography courtesy Thomas F Ewing Privacy and Security Notice The MMSNF Workshops The goal of the Materials Modeling and Simulation for Nuclear Fuels (MMSNF) workshops is to stimulate research and discussions on modeling and simulations of nuclear fuels, to assist the design of improved fuels and the evaluation of fuel performance. In addition to research focused on existing or improved types of LWR reactors, recent modeling programs, networks, and links have been created to develop innovative nuclear fuels and materials for future generations of nuclear reactors. Examples can be found in Europe (e.g. F-BRIDGE project and ACTINET network and SAMANTHA cooperative network), in the USA (e.g. CASL, NEAMS, CESAR and CMSN network

142

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational  

E-Print Network [OSTI]

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach Anna Medical Nuclear Supply Chain Design #12;Outline Background and Motivation Supply Chain Challenges The Medical Nuclear Supply Chain Network Design Model The Computational Approach Summary and Suggestions

Nagurney, Anna

143

Robust design of nonlinear internal models without adaptation  

Science Journals Connector (OSTI)

We propose a solution to the problem of semiglobal output regulation for nonlinear minimum-phase systems driven by uncertain exosystems that does not rely upon conventional adaptation schemes to estimate the frequency of the exogenous signals. Rather, ... Keywords: Nonlinear internal model principle, Nonlinear observers, Nonlinear output regulation, Robust control

Alberto Isidori; Lorenzo Marconi; Laurent Praly

2012-10-01T23:59:59.000Z

144

Internal consistency and the inner model SyDavid Friedman #  

E-Print Network [OSTI]

'' and Icon(ZFC + #) stand for ``there is an inner model of ZFC + #''. A typical consistency result takes result takes the form Icon(ZFC + LC) # Icon(ZFC + #). Thus a statement # is internally consistent i# Icon(ZFC + #) follows from Icon(ZFC + LC) for some large cardinal axiom LC. A statement can be consistent without being

145

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 49 (2009) 095020 (12pp) doi:10.1088/0029-5515/49/9/095020  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 49 (2009) 095020, which assumes the anisotropic energetic particle distribution function accelerated by ICRH as input

Zonca, Fulvio

146

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 42 (2002) 13511356 PII: S0029-5515(02)54166-1  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion input of converging driver beams. Requirements and key issues related to target injection and tracking

Najmabadi, Farrokh

147

Nuclear equation of state in the MIT bag crystal model for nuclear matter  

Science Journals Connector (OSTI)

We developed the MIT bag crystal model for nuclear matter in two aspects. First, we proved a ??=4 selection rule in the harmonic expansion of quark wave function by group theory. It enables us to push the maximum Dirac quantum number ?m up from 7 to 15, therefore improving our calculation for the energy band and wave functions of quarks. Then, by a multipole expansion of the color fields we calculate the color interaction energy between quarks. These developments enable us to calculate the energy per nucleon in nuclear matter as done previously for a free nucleon. A nuclear equation of state is derived.

Qi-Ren Zhang and Huai-Min Liu

1992-12-01T23:59:59.000Z

148

Nuclear Energy Advanced Modeling and Simulation (NEAMS) Software  

Broader source: Energy.gov (indexed) [DOE]

Advanced Modeling and Simulation (NEAMS) Software Advanced Modeling and Simulation (NEAMS) Software Verification and Validation (V&V) Plan Requirements Nuclear Energy Advanced Modeling and Simulation (NEAMS) Software Verification and Validation (V&V) Plan Requirements The purpose of the NEAMS Software V&V Plan is to define what the NEAMS program expects in terms of V&V for the computational models that are developed under NEAMS. NEAMS Software Verification and Validation Plan Requirements Version 0.pdf More Documents & Publications NEAMS Quarterly Report for January-March 2013 Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program Plan CRAD, Assessment Criteria and Guidelines for Determining the Adequacy of Software Used in the Safety Analysis and Design of Defense Nuclear Facilities

149

International training course on implementation of state systems of accounting for and control of nuclear materials: proceedings  

SciTech Connect (OSTI)

This report incorporates all lectures and presentations at the International Training Course on Implementation of State Systems of Accounting for and Control of Nuclear Materials held October 17 through November 4, 1983, at Santa Fe and Los Alamos, New Mexico and Richland, Washington, USA. Authorized by the US Nuclear Non-Proliferation Act and sponsored by the US Department of Energy in cooperation with the International Atomic Energy Agency, the course was developed to provide practical training in the design, implementation, and operation of a State system of nuclear materials accountability and control that satisfies both national and international safeguards requirements. Major emphasis for the 1983 course was placed on safeguards methods used at bulk-handling facilities, particularly low-enriched uranium conversion and fuel fabrication plants. The course was conducted by the University of California's Los Alamos National Laboratory and Exxon Nuclear Company, Inc. Tours and demonstrations were arranged at the Los Alamos National Laboratory, Los Alamos, New Mexico, and the Exxon Nuclear fuel fabrication plant, the Battelle Pacific Northwest Laboratory, Westinghouse Fast Flux Test Facility Visitor Center, and Washington Public Power System nuclear reactor facilities in Richland, Washington. Individual presentations were indexed for inclusion in the Energy Data Base.

Not Available

1984-06-01T23:59:59.000Z

150

A nuclear data acquisition system flow control model  

SciTech Connect (OSTI)

A general Petri Net representation of a nuclear data acquisition system model is presented. This model provides for the unique requirements of a nuclear data acquisition system including the capabilities of concurrently acquiring asynchronous and synchronous data, of providing multiple priority levels of flow control arbitration, and of permitting multiple input sources to reside at the same priority without the problem of channel lockout caused by a high rate data source. Finally, a previously implemented gamma camera/physiological signal data acquisition system is described using the models presented.

Hack, S.N.

1988-02-01T23:59:59.000Z

151

Nuclear Mass Datasets and Models at nuclearmasses.org  

DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

This online repository for nuclear mass information allows nuclear researchers to upload their own mass values, store then, share them with colleagues, and, in turn, visualize and analyze the work of others. The Resources link provides access to published information or tools on other websites. The Contributions page is where users will find software, documents, experimental mass data sets, and theoretical mass models that have been uploaded for sharing with the scientific community.

152

Production of small uranium dioxide microspheres for cermet nuclear fuel using the internal gelation process  

SciTech Connect (OSTI)

The U.S. National Aeronautics and Space Administration (NASA) is developing a uranium dioxide (UO2)/tungsten cermet fuel for potential use as the nuclear cryogenic propulsion stage (NCPS). The first generation NCPS is expected to be made from dense UO2 microspheres with diameters between 75 and 150 m. Previously, the internal gelation process and a hood-scale apparatus with a vibrating nozzle were used to form gel spheres, which became UO2 kernels with diameters between 350 and 850 m. For the NASA spheres, the vibrating nozzle was replaced with a custom designed, two-fluid nozzle to produce gel spheres in the desired smaller size range. This paper describes the operational methodology used to make 3 kg of uranium oxide microspheres.

Collins, Robert T [ORNL] [ORNL; Collins, Jack Lee [ORNL] [ORNL; Hunt, Rodney Dale [ORNL] [ORNL; Ladd-Lively, Jennifer L [ORNL] [ORNL; Patton, Kaara K [ORNL] [ORNL; Hickman, Robert [NASA Marshall Space Flight Center, Huntsville, AL] [NASA Marshall Space Flight Center, Huntsville, AL

2014-01-01T23:59:59.000Z

153

Comparison of Different Internal Dosimetry Systems for Selected Radionuclides Important to Nuclear Power Production  

SciTech Connect (OSTI)

This report compares three different radiation dosimetry systems currently applied by various U.S. Federal agencies and dose estimates based on these three dosimetry systems for a set of radionuclides often identified in power reactor effluents. These dosimetry systems were developed and applied by the International Commission on Radiological Protection at different times over the past six decades. Two primary modes of intake of radionuclides are addressed: ingestion in drinking water and inhalation. Estimated doses to individual organs and to the whole body based on each dosimetry system are compared for each of four age groups: infant, child, teenager, and adult. Substantial differences between dosimetry systems in estimated dose per unit intake are found for some individual radionuclides, but differences in estimated dose per unit intake generally are modest for mixtures of radionuclides typically found in nuclear power plant effluents.

Leggett, Richard Wayne [ORNL; Eckerman, Keith F [ORNL; Manger, Ryan P [ORNL

2013-08-01T23:59:59.000Z

154

Testing nuclear models via neutrino scattering  

E-Print Network [OSTI]

Recent progresses on the relativistic modeling of neutrino-nucleus reactions are presented and the results are compared with high precision experimental data in a wide energy range.

Barbaro, M B; Amaro, J E; Antonov, A N; Caballero, J A; Donnelly, T W; Gonzalez-Jimenez, R; Ivanov, M V; de Guerra, E Moya; Megias, G D; Simo, I Ruiz; Udias, J M

2014-01-01T23:59:59.000Z

155

Testing nuclear models via neutrino scattering  

E-Print Network [OSTI]

Recent progresses on the relativistic modeling of neutrino-nucleus reactions are presented and the results are compared with high precision experimental data in a wide energy range.

M. B. Barbaro; C. Albertus; J. E. Amaro; A. N. Antonov; J. A. Caballero; T. W. Donnelly; R. Gonzalez-Jimenez; M. V. Ivanov; E. Moya de Guerra; G. D. Megias; I. Ruiz Simo; J. M. Udias

2014-11-21T23:59:59.000Z

156

A model to illustrate forces in nuclear fusion  

Science Journals Connector (OSTI)

A model consisting of magnets and iron which makes a good analogy of the behavior of the electrostatic and nuclear force involved in the fusion of two protons has been constructed and used as a lecture demonstration. Detailed calculations of the magnetic field and of the forces that explain the unusual behavior of the model are presented. The model can also be useful in electricity and magnetism where students can be challenged to explain the unusual behavior of this science puzzle. ?

E. Kashy; D. A. Johnson

1994-01-01T23:59:59.000Z

157

Nano-Continuum Modeling of a Nuclear Glass Specimen Altered for 25 Years  

E-Print Network [OSTI]

Contract No. DE-AC02-05CH11231. Nano-Continuum Modeling of aNano-Continuum Modeling of a Nuclear Glass Specimen AlteredSignature on File) iv Nano-Continuum Modeling of a Nuclear

Steefel, Carl

2014-01-01T23:59:59.000Z

158

Report of a workshop on nuclear forces and nonproliferation Woodrow Wilson international center for scholars, Washington, DC October 28, 2010  

SciTech Connect (OSTI)

A workshop sponsored by the Los Alamos National Laboratory in cooperation with the Woodrow Wilson International Center for Scholars was held at the Wilson Center in Washington, DC, on October 28, 2010. The workshop addressed evolving nuclear forces and their impacts on nonproliferation in the context of the new strategic environment, the Obama Administration's Nuclear Posture Review and the 2010 NPT Review Conference. The discussions reflected the importance of the NPR for defining the role of US nuclear forces in dealing with 21st century threats and providing guidance for National Nuclear Security Administration (NNSA) and Department of Defense (DoD) programs and, for many but not all participants, highlighted its role in the successful outcome of the NPT RevCon. There was widespread support for the NPR and its role in developing the foundations for a sustainable nuclear-weapon program that addresses nuclear weapons, infrastructure and expertise in the broader nonproliferation, disarmament and international security contexts. However, some participants raised concerns about its implementation and its long-term effectiveness and sustainability.

Pilat, Joseph F [Los Alamos National Laboratory

2010-12-08T23:59:59.000Z

159

PROCEEDINGS OF THE SIXTH ANNUAL CONFERENCE OF THE INTERNATIONAL NUCLEAR TARGET DEVELOPMENT SOCIETY  

E-Print Network [OSTI]

Nuclear Research Building Tallahassee, Flcrida 32306 JEROME LERNER Argonneof the Nuclear T a r g e t Development Society, ArgonneNuclear Physics Shop University of Washington Seattle, Washington 98195 FRANK KARASEK Argonne

Authors, Various

2011-01-01T23:59:59.000Z

160

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 50 (2010) 014003 (8pp) doi:10.1088/0029-5515/50/1/014003  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 50 (2010) 014003 Nuclear Fusion Institute, RRC 'Kurchatov Institute', Moscow, Russia Received 8 June 2009, accepted, nuclear fusion research began in 1950 with the work of I.E. Tamm, A.D. Sakharov and colleagues

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

The 11th International Topical Meeting on Nuclear Thermal-Hydraulics (NURETH-11) Popes' Palace Conference Center, Avignon, France, October 2-6, 2005  

E-Print Network [OSTI]

Conference Center, Avignon, France, October 2-6, 2005 Paper: 193 ON THE SIMULATION OF NUCLEAR POWER PLANT the industrial simulation of two-phase flows in the nuclear power plant components as steam generators (SGThe 11th International Topical Meeting on Nuclear Thermal-Hydraulics (NURETH-11) Popes' Palace

Paris-Sud XI, Université de

162

288 Int. J. Nuclear Energy Science and Technology, Vol. 7, No. 4, 2013 Multi-physics modelling of nuclear reactors  

E-Print Network [OSTI]

288 Int. J. Nuclear Energy Science and Technology, Vol. 7, No. 4, 2013 Multi-physics modelling practices in a nutshell', Int. J. Nuclear Energy Science and Technology, Vol. 7, No. 4, pp.288 Energy and Nuclear Applications', Göteborg, Sweden, 13­14 October 2011 Copyright © 2013 Inderscience

Demazière, Christophe

163

Joint International Topical Meeting on Mathematics & Computation and Supercomputing in Nuclear Applications (M&C + SNA 2007) Monterey, California, April 15-19, 2007, on CD-ROM, American Nuclear Society, LaGrange Park, IL (2007)  

E-Print Network [OSTI]

@mcs.anl.gov Giuseppe Palmiotti Nuclear Engineering Division Argonne National Laboratory Argonne, IL 60439 GPalmiottiJoint International Topical Meeting on Mathematics & Computation and Supercomputing in Nuclear Applications (M&C + SNA 2007) Monterey, California, April 15-19, 2007, on CD-ROM, American Nuclear Society, La

Fischer, Paul F.

164

Nuclear Data | More Science | ORNL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Computer Science Computer Science Theory, Modeling and Simulation Cyber Security Bioinformatics Climate & Environment Systems Biology Neutron Data Analysis and Visualization Nuclear Data Nuclear Systems Modeling and Simulation Supercomputing and Computation More Science Home | Science & Discovery | More Science | Computer Science | Nuclear Data SHARE Nuclear Data Nuclear Data ORNL is a recognized, international leader in nuclear data research and development (R&D) to support nuclear applications analyses. For more than 40 years, ORNL has provided neutron resonance region nuclear data evaluations to the US Evaluated Nuclear Data File (ENDF/B) database, and many of the key ORNL resonance evaluations have also been adopted by international nuclear databases in Europe, Japan, China, and Russia. ORNL

165

The Bonn nuclear quark model revisited  

SciTech Connect (OSTI)

We present the exact solutions to the equations of the lowest energy states of the colored and color-symmetric sectors of the Bonn quark model, which is SU(3) symmetric and is defined in terms of an effective pairing force with su(4) algebraic structure. We show that the groundstate of the model is not color symmetrical except for a narrow interval in the range of possible quark numbers. We also study the performance of the Glauber coherent state, as well as of superconducting states of the BCS type, with respect to the description, not only of the absolute (colored) groundstate, but also of the minimum energy state of the color-symmetrical sector, finding that it is remarkably good. We use the model to discuss, in a schematic context, some controversial aspects of the conventional treatment of color superconductivity.

Providencia, Constanca [Departamento de Fi sica, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra (Portugal); Providencia, Joao da [Departamento de Fi sica, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra (Portugal)], E-mail: providencia@teor.fis.uc.pt; Cordeiro, Flavio [Departamento de Fi sica, Universidade de Coimbra, Rua Larga, P-3004-516 Coimbra (Portugal); Yamamura, Masatoshi [Department of Pure and Applied Physics, Faculty of Engineering Science, Kansai University, Suita 564-8680 (Japan); Tsue, Yasuhiko; Nishiyama, Seiya [Physics Division, Faculty of Science, Kochi University, Kochi 780-8520 (Japan)

2009-08-15T23:59:59.000Z

166

Nuclear Data | More Science | ORNL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear Data SHARE Nuclear Data Nuclear Data ORNL is a recognized, international leader in nuclear data research and development (R&D) to support nuclear applications analyses. For...

167

Nuclear fusion control-oriented plasma current linear models  

Science Journals Connector (OSTI)

The control of plasma in nuclear fusion has been revealed as a promising application of Control Engineering, with increasing interest in the control community during last years. In this paper it is developed a control-oriented linear model for the control ...

Aitor J. Garrido; Izaskun Garrido; M. Goretti Sevillano; Mikel Alberdi; Modesto Amundarain; Oscar Barambones; Manuel De La Sen

2010-07-01T23:59:59.000Z

168

LIMITED POWER BURSTS IN DISTRIBUTED MODELS OF NUCLEAR REACTORS  

E-Print Network [OSTI]

LIMITED POWER BURSTS IN DISTRIBUTED MODELS OF NUCLEAR REACTORS M. V. Bazhenov and E. F. Sabaev UDC employed for analyzing reactor dynamics. Equations of this type are used for analyzing the stability of the reactor power, etc. Among these problems the question of the boundedness of reactor power bursts

Bazhenov, Maxim

169

Thermohydraulic modeling of nuclear thermal rockets: The KLAXON code  

SciTech Connect (OSTI)

The hydrogen flow from the storage tanks, through the reactor core, and out the nozzle of a Nuclear Thermal Rocket is an integral design consideration. To provide an analysis and design tool for this phenomenon, the KLAXON code is being developed. A shock-capturing numerical methodology is used to model the gas flow (the Harten, Lax, and van Leer method, as implemented by Einfeldt). Preliminary results of modeling the flow through the reactor core and nozzle are given in this paper.

Hall, M.L.; Rider, W.J.; Cappiello, M.W.

1992-07-01T23:59:59.000Z

170

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational  

E-Print Network [OSTI]

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach Anna Chain Challenges The Medical Nuclear Supply Chain Network Design Model The Computational Approach Medical Nuclear Supply Chain Design #12;This presentation is based on the paper, "Medical Nuclear Supply

Nagurney, Anna

171

INTEGRATION OF FACILITY MODELING CAPABILITIES FOR NUCLEAR NONPROLIFERATION ANALYSIS  

SciTech Connect (OSTI)

Developing automated methods for data collection and analysis that can facilitate nuclear nonproliferation assessment is an important research area with significant consequences for the effective global deployment of nuclear energy. Facility modeling that can integrate and interpret observations collected from monitored facilities in order to ascertain their functional details will be a critical element of these methods. Although improvements are continually sought, existing facility modeling tools can characterize all aspects of reactor operations and the majority of nuclear fuel cycle processing steps, and include algorithms for data processing and interpretation. Assessing nonproliferation status is challenging because observations can come from many sources, including local and remote sensors that monitor facility operations, as well as open sources that provide specific business information about the monitored facilities, and can be of many different types. Although many current facility models are capable of analyzing large amounts of information, they have not been integrated in an analyst-friendly manner. This paper addresses some of these facility modeling capabilities and illustrates how they could be integrated and utilized for nonproliferation analysis. The inverse problem of inferring facility conditions based on collected observations is described, along with a proposed architecture and computer framework for utilizing facility modeling tools. After considering a representative sampling of key facility modeling capabilities, the proposed integration framework is illustrated with several examples.

Gorensek, M.; Hamm, L.; Garcia, H.; Burr, T.; Coles, G.; Edmunds, T.; Garrett, A.; Krebs, J.; Kress, R.; Lamberti, V.; Schoenwald, D.; Tzanos, C.; Ward, R.

2011-07-18T23:59:59.000Z

172

Relativistic mean-field models and nuclear matter constraints  

SciTech Connect (OSTI)

This work presents a preliminary study of 147 relativistic mean-field (RMF) hadronic models used in the literature, regarding their behavior in the nuclear matter regime. We analyze here different kinds of such models, namely: (i) linear models, (ii) nonlinear {sigma}{sup 3}+{sigma}{sup 4} models, (iii) {sigma}{sup 3}+{sigma}{sup 4}+{omega}{sup 4} models, (iv) models containing mixing terms in the fields {sigma} and {omega}, (v) density dependent models, and (vi) point-coupling ones. In the finite range models, the attractive (repulsive) interaction is described in the Lagrangian density by the {sigma} ({omega}) field. The isospin dependence of the interaction is modeled by the {rho} meson field. We submit these sets of RMF models to eleven macroscopic (experimental and empirical) constraints, used in a recent study in which 240 Skyrme parametrizations were analyzed. Such constraints cover a wide range of properties related to symmetric nuclear matter (SNM), pure neutron matter (PNM), and both SNM and PNM.

Dutra, M.; Lourenco, O.; Carlson, B. V. [Departamento de Fisica, Instituto Tecnologico de Aeronautica-CTA, 12228-900, Sao Jose dos Campos, SP (Brazil); Delfino, A. [Instituto de Fisica, Universidade Federal Fluminense, 24210-150, Boa Viagem, Niteroi, RJ (Brazil); Menezes, D. P.; Avancini, S. S. [Departamento de Fisica, CFM, Universidade Federal de Santa Catarina, CP. 476, CEP 88.040-900, Florianopolis, SC (Brazil); Stone, J. R. [Oxford Physics, University of Oxford, OX1 3PU Oxford (United Kingdom) and Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996 (United States); Providencia, C. [Centro de Fisica Computacional, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal); Typel, S. [GSI Helmholtzzentrum fuer Schwerionenforschung GmbH, Theorie, Planckstrasse 1,D-64291 Darmstadt (Germany)

2013-05-06T23:59:59.000Z

173

Validation of nuclear models used in space radiation shielding applications  

SciTech Connect (OSTI)

A program of verification and validation has been undertaken to assess the applicability of models to space radiation shielding applications and to track progress as these models are developed over time. In this work, simple validation metrics applicable to testing both model accuracy and consistency with experimental data are developed. The developed metrics treat experimental measurement uncertainty as an interval and are therefore applicable to cases in which epistemic uncertainty dominates the experimental data. To demonstrate the applicability of the metrics, nuclear physics models used by NASA for space radiation shielding applications are compared to an experimental database consisting of over 3600 experimental cross sections. A cumulative uncertainty metric is applied to the question of overall model accuracy, while a metric based on the median uncertainty is used to analyze the models from the perspective of model development by examining subsets of the model parameter space.

Norman, Ryan B., E-mail: Ryan.B.Norman@nasa.gov [NASA Langley Research Center, Hampton, VA 23681 (United States); Blattnig, Steve R. [NASA Langley Research Center, Hampton, VA 23681 (United States)] [NASA Langley Research Center, Hampton, VA 23681 (United States)

2013-01-15T23:59:59.000Z

174

Shadow prediction model for the International Space Station Alpha  

SciTech Connect (OSTI)

A Fortran computer model, SHADOW5, was developed to predict shadows on the solar arrays of the International Space Station Alpha (ISSA) for general flight modes. This shadow model was incorporated into the EPSOP-F (Electrical Power System On-Orbit Performance) program to conduct ISSA power analyses for various operating conditions. This paper describes the mathematical methods of the model and shows the typical results predicted with the model. Vector analyses with coordinate transformations were used to trace the shadows between the potential shadowing and shadowed components of the station during the sun portion of the orbit. Including the space shuttle orbiter, 40 components were modeled. The basic shapes of the components were assumed to be either planar or cylindrical. The elemental areas obtained from the Cartesian grid lines allocated on the component surfaces were projected in the sun vector direction to reconstruct shadows on the shadowed planar surface. Comparison of predicted results with other models showed good agreement. Ease of preparing input data and relatively short CPU time make this model suitable for shadow analyses required for the many design and flight configurations of the space station.

Chung, D.K. [Rockwell International, Canoga Park, CA (United States). Rocketdyne Division

1995-12-31T23:59:59.000Z

175

Nuclear temperature effects in the scission-point model of nuclear fission  

Science Journals Connector (OSTI)

According to the scission-point model, the probability for a particular fission event can be expressed in terms of the collective potential and the collective kinetic energy at the scission point. Two additional assumptions make the scission-point model an easily calculable model: the assumption of equal collective kinetic energies for constant distances d between the tips of the fragments, and the assumption that one is able to characterize the excitation energy of the fragments with a nuclear temperature T, independent of both the mass ratio and the charge ratio, and of the deformations of the fragments. It is pointed out that the latter assumption violates energy conservation. A modified, recursive procedure is proposed, resulting in an "energy conservation consistent" scission-point method. Mass and charge distributions for the fission of U235 and Cf252 compound systems have been calculated and compared with distributions following the "standard" scission-point method of Wilkins, Steinberg, and Chasman.NUCLEAR REACTIONS Scission-point model. Collective potential and intrinsic excitation energy. Nuclear temperature T. Mass and charge distributions. Fission of U235 and C252.

J. Moreau; K. Heyde; M. Waroquier

1983-10-01T23:59:59.000Z

176

Illicit trafficking of radiological & nuclear materials : modeling and analysis of trafficking trends and risks.  

SciTech Connect (OSTI)

Concerns over the illicit trafficking of radiological and nuclear materials were focused originally on the lack of security and accountability of such material throughout the former Soviet states. This is primarily attributed to the frequency of events that have occurred involving the theft and trafficking of critical material components that could be used to construct a Radiological Dispersal Device (RDD) or even a rudimentary nuclear device. However, with the continued expansion of nuclear technology and the deployment of a global nuclear fuel cycle these materials have become increasingly prevalent, affording a more diverse inventory of dangerous materials and dual-use items. To further complicate the matter, the list of nuclear consumers has grown to include: (1) Nation-states that have gone beyond the IAEA agreed framework and additional protocols concerning multiple nuclear fuel cycles and processes that reuse the fuel through reprocessing to exploit technologies previously confined to the more industrialized world; (2) Terrorist organizations seeking to acquire nuclear and radiological material due to the potential devastation and psychological effect of their use; (3) Organized crime, which has discovered a lucrative market in trafficking of illicit material to international actors and/or countries; and (4) Amateur smugglers trying to feed their families in a post-Soviet era. An initial look at trafficking trends of this type seems scattered and erratic, localized primarily to a select group of countries. This is not necessarily the case. The success with which other contraband has been smuggled throughout the world suggests that nuclear trafficking may be carried out with relative ease along the same routes by the same criminals or criminal organizations. Because of the inordinately high threat posed by terrorist or extremist groups acquiring the ingredients for unconventional weapons, it is necessary that illicit trafficking of these materials be better understood as to prepare for the sustained global development of the nuclear fuel cycle. Conversely, modeling and analyses of this activity must not be limited in their scope to loosely organized criminal smuggling, but address the problem as a commercial, industrial project for the covert development of nuclear technologies and unconventional weapon development.

York, David L.; Love, Tracia L.; Rochau, Gary Eugene

2005-01-01T23:59:59.000Z

177

ITER: The International Thermonuclear Experimental Reactor and the Nuclear Weapons Proliferation  

E-Print Network [OSTI]

militarytechnical reasons and implications of the very probable siting of ITER (the International Thermonuclear

Andr Gsponer; Jean-pierre Hurni

2004-01-01T23:59:59.000Z

178

Nuclear EMC effect in non-extensive statistical model  

SciTech Connect (OSTI)

In the present work, we attempt to describe the nuclear EMC effect by using the proton structure functions obtained from the non-extensive statistical quark model. We record that such model has three fundamental variables, the temperature T, the radius, and the Tsallis parameter q. By combining different small changes, a good agreement with the experimental data may be obtained. Another interesting point of the model is to allow phenomenological interpretation, for instance, with q constant and changing the radius and the temperature or changing the radius and q and keeping the temperature.

Trevisan, Luis A. [Departamento de Matematica e Estatistica, Universidade Estadual de Ponta Grossa, 84010-790, Ponta Grossa, PR (Brazil); Mirez, Carlos [ICET, Universidade Federal dos Vales do Jequitinhonha e Mucuri - UFVJM, Campus do Mucuri, Rua do Cruzeiro 01, Jardim Sao Paulo, 39803-371, Teofilo Otoni, MG (Brazil)

2013-05-06T23:59:59.000Z

179

Modeling Nuclear Fusion with an Ultracold Nonneutral Plasma  

SciTech Connect (OSTI)

In the hot dense interiors of stars and giant planets, nuclear fusion reactions are predicted to occur at rates that are greatly enhanced compared to those at low densities. The enhancement is caused by plasma screening of the repulsive Coulomb potential between nuclei, which increases the probability of the rare close collisions that are responsible for fusion. This screening enhancement is a small effect in the Sun, but is predicted to be much larger in dense objects such as white dwarf stars and giant planet interiors where the plasma is strongly correlated (i.e. where the Debye screening length is smaller than a mean interparticle spacing). However, strongly enhanced fusion reaction rates caused by plasma screening have never been definitively observed in the laboratory. This talk discusses a method for observing the enhancement using an analogy between nuclear energy and cyclotron energy in a cold nonneutral plasma in a strong magnetic field. In such a plasma, the cyclotron frequency is higher than other dynamical frequencies, so the kinetic energy of cyclotron motion is an adiabatic invariant. This energy is not shared with other degrees of freedom except through rare close collisions that break this invariant and couple the cyclotron motion to the other degrees of freedom. Thus, the cyclotron energy of an ion, like nuclear energy, can be considered to be an internal degree of freedom that is released only via rare close collisions. Furthermore, it has recently been shown that the rate of release of cyclotron energy is enhanced through plasma screening by precisely the same factor as that for the release of nuclear energy, because both processes rely on close collisions that are enhanced by plasma screening in the same way. Simulations and experiments measuring large plasma screening enhancements for the first time will be discussed, and the possibility of exciting and studying cyclotron burn fronts will also be considered.

Dubin, Daniel H. E. [Physics Dept., UCSD, 9500 Gilman Drive, La Jolla CA 92093-0319 (United States)

2007-08-02T23:59:59.000Z

180

Advanced nuclear reactors and tritium impacts. Modeling the aquatic pathway  

Science Journals Connector (OSTI)

The effective contribution of nuclear energy will depend on various factors related to economics, safety, public acceptance and sustainability. To assure, however, the nuclear energy development, reactor accident impacts, as Fukushima, must be evaluated in a predictive way. Environmental assessment models are used for evaluating the radiological impact of potential releases of radionuclides from nuclear reactors to the environment. It is important to evaluate, to the extent possible, the reliability of the predictions of such models, by comparing with measured values in the environment or by comparing with the predictions of other models. Tritium has a complex environmental behavior once released into the environment. It is essential to establish reference scenarios to allow the simulation of tritium aquatic pathway subsequent to accidental releases. For this purpose, two scenarios for seawater circulation were analyzed by hydrodynamic modeling. An inverse modeling procedure was successfully applied to estimate tide elevations on the borders, which are based on applying the harmonic constants and using the same overestimation percentage produced by model results to correct the border values. Simulations of validated model for postulated accidental releases of tritium inventory from heavy water reactors, whose doses could be relevant, were presented here. It was observed differences between the two scenarios for the transport modeling that were caused by the removal of large volume of polluted waters from the accident site and its dilution in the discharge area, which has minor tritium concentrations. Moreover, the processes involved in the dynamic transfer of tritium in the environment were analyzed in dependence on the environmental conditions of tropical coastal ecosystem.

Francisco Fernando Lamego Simes Filho; Abner Duarte Soares; Andr da Silva Aguiar; Celso Marcelo Franklin Lapa; Antonio Carlos Ferreira Guimares

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Development of a Preliminary Decommissioning Plan Following the International Structure for Decommissioning Costing (ISDC) of Nuclear Installations - 13361  

SciTech Connect (OSTI)

The International Structure for Decommissioning Costing (ISDC) of Nuclear Installations, published by OECD/NEA, IAEA and EC is intended to provide a uniform list of cost items for decommissioning projects and provides a standard format that permits international cost estimates to be compared. Candesco and DECOM have used the ISDC format along with two costing codes, OMEGA and ISDCEX, developed from the ISDC by DECOM, in three projects: the development of a preliminary decommissioning plan for a multi-unit CANDU nuclear power station, updating the preliminary decommissioning cost estimates for a prototype CANDU nuclear power station and benchmarking the cost estimates for CANDU against the cost estimates for other reactor types. It was found that the ISDC format provides a well defined and transparent basis for decommissioning planning and cost estimating that assists in identifying gaps and weaknesses and facilitates the benchmarking against international experience. The use of the ISDC can also help build stakeholder confidence in the reliability of the plans and estimates and the adequacy of decommissioning funding. (authors)

Moshonas Cole, Katherine; Dinner, Julia; Grey, Mike [Candesco - A Division of Kinectrics Inc, 26 Wellington E 3rd floor, Toronto, Ontario, M5E 1S2 (Canada)] [Candesco - A Division of Kinectrics Inc, 26 Wellington E 3rd floor, Toronto, Ontario, M5E 1S2 (Canada); Daniska, Vladimir [DECOM a.s., Sibirska 1, 917 01 Trnava (Slovakia)] [DECOM a.s., Sibirska 1, 917 01 Trnava (Slovakia)

2013-07-01T23:59:59.000Z

182

A sweating model for the internal ventilation of a motorcycle Claudio Canutoa  

E-Print Network [OSTI]

A sweating model for the internal ventilation of a motorcycle helmet Claudio Canutoa , Flavio and optimization of the internal ventilation of a motorcycle hel- met, with the purpose of enhancing the comfort

Ceragioli, Francesca

183

Nuclear Energy University Programs (NEUP)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

DOE-NE Fosters Novel International Investments in U.S. Nuclear Energy Research October 14, 2014 Nuclear energy is an international industry, but nuclear research and development...

184

Benchmarking nuclear models for Gamow-Teller response  

E-Print Network [OSTI]

A comparative study of the nuclear Gamow-Teller response (GTR) within conceptually different state-of-the-art approaches is presented. Three nuclear microscopic models are considered: (i) the recently developed charge-exchange relativistic time blocking approximation (RTBA) based on the covariant density functional theory, (ii) the shell model (SM) with an extended "jj77" model space and (iii) the non-relativistic quasiparticle random-phase approximation (QRPA) with a Brueckner G-matrix effective interaction. We study the physics cases where two or all three of these models can be applied. The Gamow-Teller response functions are calculated for 208-Pb, 132-Sn and 78-Ni within both RTBA and QRPA. The strengths obtained for 208-Pb are compared to data that enables a firm model benchmarking. For the nucleus 132-Sn, also SM calculations are performed within the model space truncated at the level of a particle-hole (ph) coupled to vibration configurations. This allows a consistent comparison to the RTBA where ph+phonon coupling is responsible for the spreading width and considerable quenching of the GTR. Differences between the models and perspectives of their future developments are discussed.

E. Litvinova; B. A. Brown; D. -L. Fang; T. Marketin; R. G. T. Zegers

2014-02-04T23:59:59.000Z

185

Nuclear Power Contracts and International Cooperation: Analyzing Innovation and Social Distribution in Russian Foreign Policy  

Science Journals Connector (OSTI)

What is the role of nuclear contracts in Russian foreign policy? This chapter analyzes the political economy of nuclear power regulation in Russia and its implications for Russian foreign policy when it comes to ...

Theocharis N. Grigoriadis

2012-01-01T23:59:59.000Z

186

Azimuthal Anisotropies as Stringent Test for Nuclear Transport Models  

E-Print Network [OSTI]

Azimuthal distributions of charged particles and intermediate mass fragments emitted in Au+Au collisions at 600AMeV have been measured using the FOPI facility at GSI-Darmstadt. Data show a strong increase of the in-plane azimuthal anisotropy ratio with the charge of the detected fragment. Intermediate mass fragments are found to exhibit a strong momentum-space alignment with respect of the reaction plane. The experimental results are presented as a function of the polar center-of-mass angle and over a broad range of impact parameters. They are compared to the predictions of the Isospin Quantum Molecular Dynamics model using three different parametrisations of the equation of state. We show that such highly accurate data provide stringent test for microscopic transport models and can potentially constrain separately the stiffness of the nuclear equation of state and the momentum dependence of the nuclear interaction.

P. Crochet; F. Rami; R. Dona; the FOPI Collaboration

1997-09-15T23:59:59.000Z

187

Benchmarking nuclear models for Gamow-Teller response  

E-Print Network [OSTI]

A comparative study of the nuclear Gamow-Teller response (GTR) within conceptually different state-of-the-art approaches is presented. Three nuclear microscopic models are considered: (i) the recently developed charge-exchange relativistic time blocking approximation (RTBA) based on the covariant density functional theory, (ii) the shell model (SM) with an extended "jj77" model space and (iii) the non-relativistic quasiparticle random-phase approximation (QRPA) with a Brueckner G-matrix effective interaction. We study the physics cases where two or all three of these models can be applied. The Gamow-Teller response functions are calculated for 208-Pb, 132-Sn and 78-Ni within both RTBA and QRPA. The strengths obtained for 208-Pb are compared to data that enables a firm model benchmarking. For the nucleus 132-Sn, also SM calculations are performed within the model space truncated at the level of a particle-hole (ph) coupled to vibration configurations. This allows a consistent comparison to the RTBA where ph+ph...

Litvinova, E; Fang, D -L; Marketin, T; Zegers, R G T

2014-01-01T23:59:59.000Z

188

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 42 (2002) 13821392 PII: S0029-5515(02)55646-5  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion of alpha parameters, along with the qMHD profiles and MHD equilibria are being used as inputs to codes

Budny, Robert

189

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 46 (2006) 412418 doi:10.1088/0029-5515/46/4/002  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion to reach high values of Q (the ratio between fusion power and input power) can be carried out in existing

Zonca, Fulvio

190

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 49 (2009) 075024 (10pp) doi:10.1088/0029-5515/49/7/075024  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 49 (2009) 075024 from classical NB deposition as input give rise to strong EPM activity, resulting in relaxed EP radial

Zonca, Fulvio

191

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 43 (2003) 10911100 PII: S0029-5515(03)67571-X  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion at low values of B. The RMF drive sustains particles as well as flux, and resistive input powers can

Washington at Seattle, University of

192

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 53 (2013) 042001 (3pp) doi:10.1088/0029-5515/53/4/042001  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 53 (2013) 042001 this analysis. Plasma shot probe etc data input to WBC includes exposure times, and per canonical shot Te, Ne

Harilal, S. S.

193

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 44 (2004) L1L4 PII: S0029-5515(04)72941-5  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion­2 MHz) (the uncertainty is due to the error bar of the kinetic input profiles). This result has been

Vlad, Gregorio

194

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 47 (2007) 15881597 doi:10.1088/0029-5515/47/11/022  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 47 (2007) 1588 of the LH power input. These results are directly relevant to the investigation of trapped alpha particle

Zonca, Fulvio

195

The Japan Times Printer Friendly Articles France has won the competition to host the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear-  

E-Print Network [OSTI]

the International Thermonuclear Experimental Reactor (ITER), the world's first nuclear- fusion reactor. Japan fought wins by withdrawing ITER bid Thermonuclear fusion utilizes the same process that powers the sun

196

Regulatory independence and accountability: a survey of international nuclear regulatory regimes  

Science Journals Connector (OSTI)

As the government of India considers development of an independent regulator for civil nuclear power, examples from other nations around the world, including those with established civil nuclear programmes and those now developing new nuclear, provide interesting insights and lessons to be learned. This paper compares the organisational structure of the Indian governmental agency, the Nuclear Safety Regulatory Authority, proposed in Bill No. 76 of 2011, with the organisational structures of independent national regulators of civil nuclear power programmes from the USA, the UK, Japan, the People's Republic of China and the United Arab Emirates. The paper discusses where in the government the agency is housed, sources of authority, sources of funding, regulatory powers and functional independence, both from the government agency charged with developing civil nuclear power and from nuclear facility operators.

Timothy P. Matthews; Esther K. Park

2013-01-01T23:59:59.000Z

197

Projection Operator Formalisms and the Nuclear Shell Model  

E-Print Network [OSTI]

The shell model solve the nuclear many-body problem in a restricted model space and takes into account the restricted nature of the space by using effective interactions and operators. In this paper two different methods for generating the effective interactions are considered. One is based on a partial solution of the Schrodinger equation (Bloch-Horowitz or the Feshbach projection formalism) and other on linear algebra (Lee-Suzuki). The two methods are derived in a parallel manner so that the difference and similarities become apparent. The connections with the renormalization group are also pointed out.

B. K. Jennings

2005-04-13T23:59:59.000Z

198

Nuclear winter revisited with a modern climate model and current nuclear arsenals: Still catastrophic consequences  

E-Print Network [OSTI]

of nuclear weapons states, with additional states trying to develop nuclear arsenals. We use a modern climate and upper stratosphere, producing a long aerosol lifetime. The indirect effects of nuclear weapons would. [2007], who showed that a regional nuclear conflict using 100 Hiroshima-size (15 kt) nuclear weapons

Stenchikov, Georgiy L.

199

The 12th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-12) Sheraton Station Square, Pittsburgh, Pennsylvania, U.S.A. September 30-October 4, 2007  

E-Print Network [OSTI]

in the unit square. Figure 1: Physical Domain and Fictitious Domain. simulation of nuclear power plants fromThe 12th International Topical Meeting on Nuclear Reactor Thermal Hydraulics (NURETH-12) Sheraton DOMAIN SIMULATIONS FOR THE TWO-PHASE FLOW ENERGY BALANCE OF THE CLOTAIRE STEAM GENERATOR MOCK-UP Michel

Paris-Sud XI, Université de

200

| International Atomic Energy Agency Nuclear Fusion Nucl. Fusion 54 (2014) 023004 (9pp) doi:10.1088/0029-5515/54/2/023004  

E-Print Network [OSTI]

| International Atomic Energy Agency Nuclear Fusion Nucl. Fusion 54 (2014) 023004 (9pp) doi:10 Tatyana Sizyuk and Ahmed Hassanein Center for Materials under Extreme Environment, School of Nuclear for publication 17 December 2013 Published 21 January 2014 Abstract The plasma shielding effect is a well

Harilal, S. S.

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 49 (2009) 125009 (8pp) doi:10.1088/0029-5515/49/12/125009  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 49 (2009) 125009 of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic surface [29]. GTC simulations of a small amplitude GAM recover the analytic linear dispersion relation

Lin, Zhihong

202

| International Atomic Energy Agency Nuclear Fusion Nucl. Fusion 54 (2014) 012002 (7pp) doi:10.1088/0029-5515/54/1/012002  

E-Print Network [OSTI]

| International Atomic Energy Agency Nuclear Fusion Nucl. Fusion 54 (2014) 012002 (7pp) doi:10 loads and particle bombardment is a key issue for the nuclear fusion community. Currently high current.1088/0029-5515/54/1/012002 LETTER Experimental simulation of materials degradation of plasma-facing components using lasers N. Farid

Harilal, S. S.

203

A nuclear vibron model applied to light and heavy nuclear molecules  

Science Journals Connector (OSTI)

A nuclear vibron model for nuclear molecules consisting of two clusters with inner structure is investigated. The Hamiltonian model has a UC1(6)?UC2(6)?UR(4)?SUC1(3)?SUC2(3)?SUR(3) dynamical symmetry. Applying a geometrical mapping, the relation of the parameter of the coherent state to the relative distance of the two clusters is deduced. The Hamiltonian model exhibits a minimum at relative distances different from zero. It is discussed how to deduce the potential, knowing the spectrum, and how to deduce the spectrum, knowing the potential. As a classical example the system 12C+12C is taken, where the spectrum is known and the internuclear potential can be obtained. This system serves as a consistency check of the method. Afterwards, the heavy system 96Sr+146Ba, playing a role as a subsystem of a possible three cluster molecule, is investigated and the possible structure of the spectrum is deduced. We show that in order to obtain a Hamiltonian consistent with a geometrical picture, the structure of this Hamiltonian is restricted. Ambiguities of the structure of the spectrum still exist but can be ordered into different classes.

Huitzilin Ypez-Martnez; Peter O. Hess; ?erban Mi?icu

2003-07-29T23:59:59.000Z

204

Design of battery pack and internal combustion engine thermal models for hybrid electric vehicles.  

E-Print Network [OSTI]

?? This thesis focuses on the design of computational models, capable of simulating the thermal behaviour of a battery pack and internal combustion engine equipping (more)

Catacchio, Gabriele

2013-01-01T23:59:59.000Z

205

Petri-Net Simulation Model of a Nuclear Component Degradation Process , E. Zioa,b  

E-Print Network [OSTI]

1 Petri-Net Simulation Model of a Nuclear Component Degradation Process Y.F. Lia* , E. Zioa,b , Y models [2-5] and simulation models [1, 6, 7]. The analytical degradation models can be further classified

Paris-Sud XI, Université de

206

Constituent quark model for nuclear stopping in high energy nuclear collisions  

Science Journals Connector (OSTI)

We study nuclear stopping in high energy nuclear collisions using the constituent quark model. It is assumed that wounded nucleons with a different number of interacted quarks hadronize in different ways. The probabilities of having such wounded nucleons are evaluated for proton-proton, proton-nucleus, and nucleus-nucleus collisions. After examining our model in proton-proton and proton-nucleus collisions and fixing the hadronization functions, it is extended to nucleus-nucleus collisions. It is used to calculate the rapidity distribution and the rapidity shift of final-state protons in nucleus-nucleus collisions. The computed results are in good agreement with the experimental data on 32S+32S at Elab=200A GeV and 208Pb+208Pb at Elab=160A GeV. Theoretical predictions are also given for proton rapidity distribution in 197Au+197Au at s=200A GeV (BNL-RHIC). We predict that the nearly baryon-free region will appear in the midrapidity region and the rapidity shift is ??y?=2.24.

T. K. Choi; M. Maruyama; F. Takagi

1997-02-01T23:59:59.000Z

207

Model of a nuclear - optically - pumped liquid laser  

SciTech Connect (OSTI)

The model of a nuclear - optically - pumped liquid laser is constructed and the laser characteristics are analysed for different parameters of the setup and pump pulse, compositions of the converter media and active elements. The lasing parameters of the liquid laser using heavy-water solution of {sup 245}Cm as the converter medium and neodymium-containing phosphorous oxychloride (phosphoryl chloride) as the active element are calculated. It follows from the results of calculations that lasing can be achieved in these media pumped by neutrons from the BARS-6 reactor. (lasers)

Seregin, A A; D'yachenko, P P; Seregina, E A [State Scientific Center of the Russian Federation 'A.I. Leipunski Institute for Physics and Power Engineering', Obninsk, Kaluga Region (Russian Federation)

2003-06-30T23:59:59.000Z

208

Hybrid reliability model for nuclear reactor safety system  

Science Journals Connector (OSTI)

The dependability of critical safety systems needs to be quantitatively determined in order to verify their effectiveness, e.g. with regard to regulatory requirements. Since modular redundant safety systems are not required for normal operation, their reliability is strongly dependent on periodic inspection. Several modeling methods for the quantitative assessment of dependability are described in the literature, with a broad variation in complexity and modeling power. Static modeling techniques such as fault tree analysis (FTA) or reliability block diagrams (RBD) are not capable of capturing redundancy and repair or test activities. Dynamic state space based models such as continuous time Markov chains (CTMC) are more powerful but often result in very large, intractable models. Moreover, exponentially distributed state residence times are not a correct representation of actual residence times associated with repair activities or periodic inspection. In this study, a hybrid model combines a system level RBD with a CTMC to describe the dynamics. The effects of periodic testing are modeled by redistributing state probabilities at deterministic test times. Applying the method to the primary safety shutdown system of the BR2(Belgian Reactor 2)nuclear research reactor, resulted in a quantitative as well as a qualitative assessment of its reliability.

Steven Verlinden; Geert Deconinck; Bernard Coup

2012-01-01T23:59:59.000Z

209

Koizumi says Japan still hoping to host international nuclear fusion ... http://asia.news.yahoo.com/050614/ap/d8an68i81.html 1 of 2 6/14/05 7:48 AM  

E-Print Network [OSTI]

Koizumi says Japan still hoping to host international nuclear fusion ... http still hoping to host international nuclear fusion reactor Contentious negotiations between Japan and France to locate a multibillion dollar nuclear fusion reactor will likely go down to the wire, Japan

210

International energy outlook 1996  

SciTech Connect (OSTI)

This International Energy Outlook presents historical data from 1970 to 1993 and EIA`s projections of energy consumption and carbon emissions through 2015 for 6 country groups. Prospects for individual fuels are discussed. Summary tables of the IEO96 world energy consumption, oil production, and carbon emissions projections are provided in Appendix A. The reference case projections of total foreign energy consumption and of natural gas, coal, and renewable energy were prepared using EIA`s World Energy Projection System (WEPS) model. Reference case projections of foreign oil production and consumption were prepared using the International Energy Module of the National Energy Modeling System (NEMS). Nuclear consumption projections were derived from the International Nuclear Model, PC Version (PC-INM). Alternatively, nuclear capacity projections were developed using two methods: the lower reference case projections were based on analysts` knowledge of the nuclear programs in different countries; the upper reference case was generated by the World Integrated Nuclear Evaluation System (WINES)--a demand-driven model. In addition, the NEMS Coal Export Submodule (CES) was used to derive flows in international coal trade. As noted above, foreign projections of electricity demand are now projected as part of the WEPS. 64 figs., 62 tabs.

NONE

1996-05-01T23:59:59.000Z

211

New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear Plants |  

Broader source: Energy.gov (indexed) [DOE]

New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear Plants New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear Plants January 31, 2012 - 2:09pm Addthis The Electric Power Research Institute (EPRI), the U.S. Department of Energy (DOE), and the U.S. Nuclear Regulatory Commission (NRC) released a new seismic study today that will help U.S. nuclear facilities in the central and eastern United States reassess seismic hazards. The Central and Eastern United States Seismic Source Characterization for Nuclear Facilities model and report is the culmination of a four-year effort among the participating organizations and replaces previous seismic source models used by industry and government since the late 1980s. The NRC is requesting U.S. nuclear power plants to reevaluate seismic

212

New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear Plants |  

Broader source: Energy.gov (indexed) [DOE]

New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear Plants New Seismic Model Will Refine Hazard Analysis at U.S. Nuclear Plants January 31, 2012 - 2:09pm Addthis The Electric Power Research Institute (EPRI), the U.S. Department of Energy (DOE), and the U.S. Nuclear Regulatory Commission (NRC) released a new seismic study today that will help U.S. nuclear facilities in the central and eastern United States reassess seismic hazards. The Central and Eastern United States Seismic Source Characterization for Nuclear Facilities model and report is the culmination of a four-year effort among the participating organizations and replaces previous seismic source models used by industry and government since the late 1980s. The NRC is requesting U.S. nuclear power plants to reevaluate seismic

213

Modelling international wind energy diffusion: Are the patterns of induced diffusion `S'  

E-Print Network [OSTI]

Modelling international wind energy diffusion: Are the patterns of induced diffusion `S' shaped datasets, the paper explores the patterns of international wind energy diffusion in OECD countries. The model employed in the paper predicted that wind energy, as a complex and expensive innovation, would

Feigon, Brooke

214

Internal model based tracking and disturbance rejection for stable well-posed systems  

Science Journals Connector (OSTI)

In this paper we solve the tracking and disturbance rejection problem for infinite-dimensional linear systems, with reference and disturbance signals that are finite superpositions of sinusoids. We explore two approaches, both based on the internal model ... Keywords: Coupled beams, Dynamic stabilization, Exponential stability, Input-output stability, Internal model principle, Optimizability, Positive transfer function, Structural acoustics, Tracking, Well-posed linear system

Richard Rebarber; George Weiss

2003-09-01T23:59:59.000Z

215

Proceedings of the international meeting on thermal nuclear reactor safety. Vol. 1  

SciTech Connect (OSTI)

Separate abstracts are included for each of the papers presented concerning current issues in nuclear power plant safety; national programs in nuclear power plant safety; radiological source terms; probabilistic risk assessment methods and techniques; non LOCA and small-break-LOCA transients; safety goals; pressurized thermal shocks; applications of reliability and risk methods to probabilistic risk assessment; human factors and man-machine interface; and data bases and special applications.

none,

1983-02-01T23:59:59.000Z

216

Internal consistency and the inner model Sy-David Friedman  

E-Print Network [OSTI]

, we obtain a new type of consistency result. Let Con(ZFC + ) stand for "ZFC + is consistent" and Icon Icon(ZFC + LC) Icon(ZFC + ). Thus a statement is internally consistent iff Icon(ZFC + ) follows from Icon(ZFC + LC) for some large cardinal axiom LC. A statement can be consistent without being internally

217

Analysis of the Independent Particle Model approach to Nuclear Densities  

E-Print Network [OSTI]

We present an analysis of the use of the Darwin-Fowler approximation in connection with the statistical IPM, by comparing the results of our recent studies with the occupation number approach (OCN) and some traditional statistical independent particle model (IPM) approaches. The analysis of level density works based on the statistical IPM reveals that the use of the the Darwin-Fowler approximation, in some of them, is theoretically inconsistent and some of their results should rather be considered as theoretical coincidences with other consistent approaches, than proofs of their validity. We conclude that, in general, the use of the Darwin-Fowler approximation with the statistical IPM should be used criteriously or, if possible, avoided altogether and suggest that the combinatorial IPM approaches have important advantages over the other models and formalisms analyzed in this paper, especially regarding the consistency of the microscopic description of the nuclear structure and dynamics of non highly excited systems.

F. B. Guimaraes

2012-08-31T23:59:59.000Z

218

MODELING ATMOSPHERIC RELEASES OF TRITIUM FROM NUCLEAR INSTALLATIONS  

SciTech Connect (OSTI)

Tritium source term analysis and the subsequent dispersion and consequence analyses supporting the safety documentation of Department of Energy nuclear facilities are especially sensitive to the applied software analysis methodology, input data and user assumptions. Three sequential areas in tritium accident analysis are examined in this study to illustrate where the analyst should exercise caution. Included are: (1) the development of a tritium oxide source term; (2) use of a full tritium dispersion model based on site-specific information to determine an appropriate deposition scaling factor for use in more simplified, broader modeling, and (3) derivation of a special tritium compound (STC) dose conversion factor for consequence analysis, consistent with the nature of the originating source material. It is recommended that unless supporting, defensible evidence is available to the contrary, the tritium release analyses should assume tritium oxide as the species released (or chemically transformed under accident's environment). Important exceptions include STC situations and laboratory-scale releases of hydrogen gas. In the modeling of the environmental transport, a full phenomenology model suggests that a deposition velocity of 0.5 cm/s is an appropriate value for environmental features of the Savannah River Site. This value is bounding for certain situations but non-conservative compared to the full model in others. Care should be exercised in choosing other factors such as the exposure time and the resuspension factor.

Okula, K

2007-01-17T23:59:59.000Z

219

3D CFD ELECTROCHEMICAL AND HEAT TRANSFER MODEL OF AN INTERNALLY MANIFOLDED SOLID OXIDE ELECTROLYSIS CELL  

SciTech Connect (OSTI)

A three-dimensional computational fluid dynamics (CFD) electrochemical model has been created to model high-temperature electrolysis cell performance and steam electrolysis in an internally manifolded planar solid oxide electrolysis cell (SOEC) stack. This design is being evaluated at the Idaho National Laboratory for hydrogen production from nuclear power and process heat. Mass, momentum, energy, and species conservation and transport are provided via the core features of the commercial CFD code FLUENT. A solid-oxide fuel cell (SOFC) model adds the electrochemical reactions and loss mechanisms and computation of the electric field throughout the cell. The FLUENT SOFC user-defined subroutine was modified for this work to allow for operation in the SOEC mode. Model results provide detailed profiles of temperature, operating potential, steam-electrode gas composition, oxygen-electrode gas composition, current density and hydrogen production over a range of stack operating conditions. Single-cell and five-cell results will be presented. Flow distribution through both models is discussed. Flow enters from the bottom, distributes through the inlet plenum, flows across the cells, gathers in the outlet plenum and flows downward making an upside-down ''U'' shaped flow pattern. Flow and concentration variations exist downstream of the inlet holes. Predicted mean outlet hydrogen and steam concentrations vary linearly with current density, as expected. Effects of variations in operating temperature, gas flow rate, oxygen-electrode and steam-electrode current density, and contact resistance from the base case are presented. Contour plots of local electrolyte temperature, current density, and Nernst potential indicate the effects of heat transfer, reaction cooling/heating, and change in local gas composition. Results are discussed for using this design in the electrolysis mode. Discussion of thermal neutral voltage, enthalpy of reaction, hydrogen production, cell thermal efficiency, cell electrical efficiency, and Gibbs free energy are discussed and reported herein.

Grant L. Hawkes; James E. O'Brien; Greg Tao

2011-11-01T23:59:59.000Z

220

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach  

E-Print Network [OSTI]

Medical Nuclear Supply Chain Design: A Tractable Network Model and Computational Approach Anna of medical nuclear supply chains. Our focus is on the molybdenum supply chain, which is the most commonly is of special relevance to healthcare given the medical nuclear product's widespread use as well as the aging

Nagurney, Anna

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Resonances in Complex-Scaled Orthogonality Condition Model of Nuclear Cluster System  

Science Journals Connector (OSTI)

......Orthogonality Condition Model of Nuclear Cluster System Andras...Kiyoshi Kato * Institute of Nuclear Research of the Hungarian...It is shown that the energy and width of various...Mechanism of the Anomalous Energy Shift between \\voldmaths-States...Recent Developments in Nuclear Cluster Physics Hisashi......

Andrs T. Kruppa; Kiyoshi Kato

1990-12-01T23:59:59.000Z

222

Seismic modeling and analysis of a prototype heated nuclear waste storage tunnel, Yucca Mountain, Nevada  

E-Print Network [OSTI]

was heated to replicate the effects of long-term storage of decaying nuclear waste and to study the effects for the long- term storage of high-level nuclear waste from reactors and decom- missioned atomic weaponsSeismic modeling and analysis of a prototype heated nuclear waste storage tunnel, Yucca Mountain

Snieder, Roel

223

National Nuclear Security Administration International Safeguards Education & Training Program(s)  

SciTech Connect (OSTI)

The introduction of nuclear power is a challenging, time-consuming and complex endeavor. After lengthy deliberations and research, some discover they are not prepared to take on the responsibilities or make the necessary investments to pursue nuclear power at this time. In particular, as countries begin to study their education systems with a critical eye, they discover they are unlikely to produce the requisite people to support the new plant they had hoped to introduce in the next ten to fifteen years. Without experienced personnel who can manage, operate, regulate and inspect the new plant, there is no point to building a plant in the first place. This paper will begin with an overview of various challenges associated with establishing and implementing a safe, secure and sustainable nuclear program and describe the some of the key issues that need to be addressed while planning to introduce nuclear power into an energy portfolio. Subsequent sections will describe how the United States is assisting countries in this planning process and in developing an effective workforce capable of supporting the nuclear program. Next, the paper will look at the key documents countries need to prepare in order to develop an effective workforce. The final section will offer some potential measures for success to ensure the long-term viability of the education system.

Frazar, Sarah L.; McClelland-Kerr, John

2009-10-06T23:59:59.000Z

224

International auspices for the storage of spent nuclear fuel as a nonproliferation measure  

SciTech Connect (OSTI)

The maintenance of spent nuclear fuel from power reactors will pose problems regardless of how or when the debate over reprocessing is resolved. At present, many reactor sites contain significant buildups of spent fuel stored in holding pools, and no measure short of shutting down reactors with no remaining storage capacity will alleviate the need for away-from-reactor storage. Although the federal government has committed itself to dealing with the spent fuel problem, no solution has been reached, largely because of a debate over differing projections of storage capacity requirements. Proliferation of weapons grade nuclear material in many nations presents another pressing issue. If nations with small nuclear programs are forced to deal with their own spent fuel accumulations, they will either have to reprocess it indigenously or contract to have it reprocessed in a foreign reprocessing plant. In either case, these nations may eventually possess sufficient resources to assemble a nuclear weapon. The problem of spent fuel management demands real global solutions, and further delay in solving the problem of spent nuclear fuel accumulation, both nationally and globally, can benefit only a small class of elected officials in the short term and may inflict substantial costs on the American public, and possibly the world. (JMT)

O'Brien, J.N.

1981-10-01T23:59:59.000Z

225

THERMODYNAMIC MODEL FOR URANIUM DIOXIDE BASED NUCLEAR FUEL  

SciTech Connect (OSTI)

Many projects involving nuclear fuel rest on a quantitative understanding of the co-existing phases at various stages of burnup. Since the many fission products have considerably different abilities to chemically associate with oxygen, and the oxygen-to-metal molar ratio is slowly changing, the chemical potential of oxygen is a function of burnup. Concurrently, well-recognized small fractions of new phases such as inert gas, noble metals, zirconates, etc. also develop. To further complicate matters, the dominant UO2 fuel phase may be non-stoichiometric and most of the minor phases themselves have a variable composition dependent on temperature and possible contact with the coolant in the event of a sheathing breach. A thermodynamic fuel model to predict the phases in partially burned CANDU (CANada Deuterium Uranium) nuclear fuel containing many major fission products has been under development. The building blocks of the model are the standard Gibbs energies of formation of the many possible compounds expressed as a function of temperature. To these data are added mixing terms associated with the appearance of the component species in particular phases. In operational terms, the treatment rests on the ability to minimize the Gibbs energy in a multicomponent system, in our case using the algorithms developed by Eriksson. The model is capable of handling non-stoichiometry in the UO2 fluorite phase, dilute solution behaviour of significant solute oxides, noble metal inclusions, a second metal solid solution U(Pd-Rh-Ru)3, zirconate, molybdate, and uranate solutions as well as other minor solid phases, and volatile gaseous species.

Thompson, Dr. William T. [Royal Military College of Canada; Lewis, Dr. Brian J [Royal Military College of Canada; Corcoran, E. C. [Royal Military College of Canada; Kaye, Dr. Matthew H. [Royal Military College of Canada; White, S. J. [Royal Military College of Canada; Akbari, F. [Atomic Energy of Canada Limited, Chalk River Laboratories; Higgs, Jamie D. [Atomic Energy of Canada Limited, Point Lepreau; Thompson, D. M. [Praxair Inc.; Besmann, Theodore M [ORNL; Vogel, S. C. [Los Alamos National Laboratory (LANL)

2007-01-01T23:59:59.000Z

226

Model nuclear matter calculations in several Brueckner and Green's function theories  

Science Journals Connector (OSTI)

Model nuclear matter calculations are performed using two versions of the Brueckner theory (standard lowest order theory and a...? 00,? 10 and Galitskii's ladder approximation). Gr...

P. Haensel; C. Marville

1978-01-01T23:59:59.000Z

227

Development of nuclear models for higher energy calculations  

SciTech Connect (OSTI)

Two nuclear models for higher energy calculations have been developed in the regions of high and low energy transfer, respectively. In the former, a relativistic hybrid-type preequilibrium model is compared with data ranging from 60 to 800 MeV. Also, the GNASH exciton preequilibrium-model code with higher energy improvements is compared with data at 200 and 318 MeV. In the region of low energy transfer, nucleon-nucleus scattering is predominately a direct reaction involving quasi-elastic collisions with one or more target nucleons. We discuss various aspects of quasi-elastic scattering which are important in understanding features of cross sections and spin observables. These include (1) contributions from multi-step processes; (2) damping of the continuum response from 2p-2h excitations; (3) the ''optimal'' choice of frame in which to evaluate the nucleon-nucleon amplitudes; and (4) the effect of optical and spin-orbit distortions, which are included in a model based on the RPA the DWIA and the eikonal approximation. 33 refs., 15 figs.

Bozoian, M.; Siciliano, E.R.; Smith, R.D.

1988-01-01T23:59:59.000Z

228

Modeling of Combustion Processes in Internal Combustion Engines  

Science Journals Connector (OSTI)

Improving internal combustion engines (ICE) and increasing the quality of operation are linked with the necessity of maximally increasing the degree of compression. For ICE with spark ignition (otto cycle), th...

V. A. Vinokurov; V. A. Kaminskii; V. A. Frost

2000-11-01T23:59:59.000Z

229

Summary of "Materials Modeling and Simulations for Nuclear Fuels"  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Summary of "Materials Modeling and Simulations for Nuclear Fuels" Summary of "Materials Modeling and Simulations for Nuclear Fuels" (MMSNF 2013) workshop Director's Welcome Organization Achievements Highlights Fact Sheets, Brochures & Other Documents Multimedia Library About Nuclear Energy Nuclear Reactors Designed by Argonne Argonne's Nuclear Science and Technology Legacy Opportunities within NE Division Visit Argonne Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Highlights Bookmark and Share "Materials Modeling and Simulations for Nuclear Fuels" (MMSNF 2013) workshop Workshop Summary Presentation during MMSNF Workshop in Chicago

230

Prediction of nuclear proteins using SVM and HMM models  

Science Journals Connector (OSTI)

All modules were trained and tested on a non-redundant dataset and evaluated using five-fold cross-validation ... based module/profile was developed for searching exclusively nuclear and non-nuclear domains in a ...

Manish Kumar; Gajendra PS Raghava

2009-01-01T23:59:59.000Z

231

The Seven Cs Ethical Model of Communication: Environmental Communication and Indigenous Knowledge Management Strategies in International Agricultural Development  

E-Print Network [OSTI]

for international organizations serving agricultural development. Conclusions for the 7Cs ethical model of communication offer perspective on the model as a discursive response to neoliberal policies and international development ethics....

McCann, Elisabeth

2012-10-19T23:59:59.000Z

232

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 50 (2010) 095005 (15pp) doi:10.1088/0029-5515/50/9/095005  

E-Print Network [OSTI]

IOP PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 50 (2010) 095005 of these papers can be found in issue 3 2010 of Nuclear Fusion http://iopscience.iop.org/0029-5515/50/3/039901. b) in the energy range 0.5�1 MeV. The total power input will be in the 30�40 MW range under different plasma

Vlad, Gregorio

233

Development of a computational model for nuclear electric orbital transfer vehicles  

E-Print Network [OSTI]

DEVELOPMENT OF A COMPUTATIONAL MODEL FOR NUCLEAR ELECTRIC ORBITAL TRANSFER VEHICLES A Thesis by WILLIAM FOUNTAIN LYON III Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements... for the degree of MASTER OF SCIENCE August 1989 Major Subject: Nuclear Engineering DEVELOPMENT OF A COMPUTATIONAL MODEL FOR NUCLEAR ELECTRIC ORBITAL TRANSFER VEHICLES A Thesis by WILLIAM FOUNTAIN LYON III Approved as to style and content by: K. L...

Lyon, William Fountain

2012-06-07T23:59:59.000Z

234

Shell model nuclear matrix elements for competing mechanisms contributing to double beta decay  

SciTech Connect (OSTI)

Recent progress in the shell model approach to the nuclear matrix elements for the double beta decay process are presented. This includes nuclear matrix elements for competing mechanisms to neutrionless double beta decay, a comparison between closure and non-closure approximation for {sup 48}Ca, and an updated shell model analysis of nuclear matrix elements for the double beta decay of {sup 136}Xe.

Horoi, Mihai [Department of Physics, Central Michigan University, Mount Pleasant, Michigan, 48859 (United States)

2013-12-30T23:59:59.000Z

235

Internal tide generation at the continental shelf modelled using a modal decomposition  

E-Print Network [OSTI]

Internal tide generation at the continental shelf modelled using a modal decomposition: two are required. Using this formulation, we calculate the internal tide generated by a time-periodic barotropic-layer or uniformly stratified. For the two-layer case, we derive expressions for the shoreward and oceanward energy

236

Energetics of internal tides around the Kerguelen Plateau from modeling and altimetry  

E-Print Network [OSTI]

of possible M2 internal tide generation in the Kerguelen Plateau region. Barotropic energy flux energy into baroclinic tide generation over the northern Kerguelen Plateau shelf break, consistentEnergetics of internal tides around the Kerguelen Plateau from modeling and altimetry Claire

237

Internal consistency and the inner model hypothesis (Budapest lecture, August 2005)  

E-Print Network [OSTI]

for ``ZFC + # is consistent'' and Icon(ZFC + #) stand for ``there is an inner model of ZFC + #''. A typical. An internal consistency result takes the form Icon(ZFC + LC) # Icon(ZFC + #). Thus a statement # is internally consistent relative to large cardinals i# Icon(ZFC + #) follows from Icon(ZFC + LC) for some large cardinal

238

Internal consistency and the inner model hypothesis (Budapest lecture, August 2005)  

E-Print Network [OSTI]

for "ZFC + is consistent" and Icon(ZFC + ) stand for "there is an inner model of ZFC + ". A typical. An internal consistency result takes the form Icon(ZFC + LC) Icon(ZFC + ). Thus a statement is internally consistent relative to large cardinals iff Icon(ZFC + ) follows from Icon(ZFC + LC) for some large cardinal

239

Model-predicted distribution of wind-induced internal wave energy in the world's oceans  

E-Print Network [OSTI]

Model-predicted distribution of wind-induced internal wave energy in the world's oceans Naoki 9 July 2008; published 30 September 2008. [1] The distribution of wind-induced internal wave energy-scaled kinetic energy are all consistent with the available observations in the regions of significant wind

Miami, University of

240

A patentometric analysis of the International Nuclear Information System database: 1970-2006  

Science Journals Connector (OSTI)

Of the 46 461 patents studied for the period 1970-2006 from the INIS Database, inputs (in percentages) were from Japan (27.9), the USA (23), Germany (13.7), France (11.3) and the UK (7.2). The main languages used were English (35.7), Japanese (27.9), German (14) and French (11.4), out of 20 languages. Patents with percentages in a single category were Engineering and Technology (62.4); Chemistry, Materials and Earth Sciences (13.9); Isotopes and Isotope and Radiation Applications (6.2); Physics (5.5); Life and Environmental Sciences (4.6); Other Aspects of Nuclear and Non-nuclear Energy (0.2); and multidisciplinary (7.2). Among the top inventors, Makoto Ueda had 140 patents, J. Schoening 121 and F.S. Jabsen 115.

T. Swarna; Anjali Prabhu; Geeta Nabar; V.L. Kalyane; Vijai Kumar

2009-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Evaluation of Indian input to the international nuclear information system database  

Science Journals Connector (OSTI)

The study is aimed at analysing the INIS bibliographic records of publications in India during the period 2000-2008. The analysis includes the inputting trend, time-lag, contributing journals, country collaboration, content analysis through the classification and keywords. India has a total number of 14,697 records input to the database with an yearly average of 1631 records. The timeliness of input is very noteworthy as 29.15% of all articles are input in the same publication year, 52.57% articles are of only one year delay in inputting. Pramana, Journal of Medical Physics, Radiation Protection and Environment are found as the most contributed Indian journals. Scientists from USA, Germany, Japan, etc., are the main contributors. Nuclear physics and radiation physics, specific nuclear reactors and associated plants, particle accelerators, inorganic, organic, physical and analytical chemistry, etc., are main areas of the Indian input.

Anil Kumar; E.R. Prakasan; Sandeep Kadam; Nita Bhaskar

2011-01-01T23:59:59.000Z

242

Sensitivity of economic performance of the nuclear fuel cycle to simulation modeling assumptions  

E-Print Network [OSTI]

Comparing different nuclear fuel cycles and assessing their implications require a fuel cycle simulation model as complete and realistic as possible. In this thesis, methodological implications of modeling choices are ...

Bonnet, Nicphore

2007-01-01T23:59:59.000Z

243

Geomechanical/Geochemical Modeling Studies Conducted within the International DECOVALEX Project  

E-Print Network [OSTI]

Scale Heater Test at Yucca Mountain, International JournalA is a simplified model of the Yucca Mountain site, a deepthe Drift Scale Test at Yucca Mountain (a setting similar to

2005-01-01T23:59:59.000Z

244

GARCIA-PICHEL, FERRAN. A model for internal self-shading in ...  

Science Journals Connector (OSTI)

I present a bio-optical model that estimates the internal self-shading caused by absorbing ... prediction of the effects of organismal size on both the inherent sensitivity to ultraviolet radiation and ... Dose modification Factor by which a photo-.

1999-12-21T23:59:59.000Z

245

A new modeling approach of pressure waves at the inlet of internal combustion engines  

Science Journals Connector (OSTI)

This paper presents a new model used to describe the propagation of pressure waves at the inlet systems of internal combustion engine. In the first part, an analogy ... a pipe and a mechanical ideal mass damper spring

David Chalet; Alexandre Mah; Jean-Franois Htet

2011-06-01T23:59:59.000Z

246

Air Quality Model Evaluation International Initiative (AQMEII): A Two-Continent Effort for the Evaluation of Regional Air Quality Models  

Science Journals Connector (OSTI)

With the endorsement and support from the U.S. Environmental Protection Agency, European Commission, and Environment Canada, a project entitled Air Quality Model Evaluation International Initiative (AQMEII) was.....

S. T. Rao; Rohit Mathur; Christian Hogrefe

2014-01-01T23:59:59.000Z

247

International Conference of Modeling, Optimization and Simulation -MOSIM'12 June 06-08, 2012 Bordeaux -France  

E-Print Network [OSTI]

9th International Conference of Modeling, Optimization and Simulation - MOSIM'12 June 06-08, 2012 Physical Systems (CPS), has arisen. In terms of modeling and simulation, CPS--like many technical systems-oriented Modeling and Simulation, Causality, Cyber-Physical System (CPS), algorithmic loop, instantaneous multiple

Boyer, Edmond

248

On the asymptotic methods for nuclear collective models  

E-Print Network [OSTI]

Contractions of orthogonal groups to Euclidean groups are applied to analytic descriptions of nuclear quantum phase transitions. The semiclassical asymptotic of multipole collective Hamiltonians are also investigated.

A. C. Gheorghe; A. A. Raduta

2009-03-26T23:59:59.000Z

249

The International Remote Monitoring Project: Results of the Swedish Nuclear Power Facility field trial  

SciTech Connect (OSTI)

The Swedish Nuclear Power Inspectorate (SKI) and the US Department of Energy (DOE) sponsored work on a Remote Monitoring System (RMS) that was installed in August 1994 at the Barseback Works north of Malmo, Sweden. The RMS was designed to test the front end detection concept that would be used for unattended remote monitoring activities. Front end detection reduces the number of video images recorded and provides additional sensor verification of facility operations. The function of any safeguards Containment and Surveillance (C/S) system is to collect information which primarily is images that verify the operations at a nuclear facility. Barseback is ideal to test the concept of front end detection since most activities of safeguards interest is movement of spent fuel which occurs once a year. The RMS at Barseback uses a network of nodes to collect data from microwave motion detectors placed to detect the entrance and exit of spent fuel casks through a hatch. A video system using digital compression collects digital images and stores them on a hard drive and a digital optical disk. Data and images from the storage area are remotely monitored via telephone from Stockholm, Sweden and Albuquerque, NM, USA. These remote monitoring stations operated by SKI and SNL respectively, can retrieve data and images from the RMS computer at the Barseback Facility. The data and images are encrypted before transmission. This paper presents details of the RMS and test results of this approach to front end detection of safeguard activities.

Johnson, C.S. [Sandia National Labs., Albuquerque, NM (United States); af Ekenstam, G.; Sallstrom, M. [Swedish Nuclear Power Inspectorate, Stockholm (Sweden)

1995-07-01T23:59:59.000Z

250

The National Energy Modeling System: An Overview 2000 - International  

Gasoline and Diesel Fuel Update (EIA)

international energy module (IEM) consists of four submodules (Figure 4) that perform the following functions: international energy module (IEM) consists of four submodules (Figure 4) that perform the following functions: world oil market submodule—calculates the average annual world oil price (imported refiner acquisition cost) that is consistent with worldwide petroleum demand and supply availability crude oil supply submodule—provides im- ported crude oil supply curves for five crude oil quality classes petroleum products supply submodule—pro- vides imported refined product supply curves for eleven types of refined products oxygenates supply submodule—provides imported oxygenates supply curves for methyl tertiary butyl ether (MTBE) and methanol. Figure 4. International Energy Module Structure The world oil price that is generated by the world oil market submodule is used by all the modules of NEMS as well as the other submodules of IEM. The import supply curves for crude oils, refined products, and oxygenates are used by the petroleum market module.

251

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 46 (2006) 1723 doi:10.1088/0029-5515/46/1/002  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion of the flux at points on the plasma boundary, which are used as input to a shape control algorithm known physics, since realistic solutions to the plasma force balance can be used as inputs to feedback loops

Princeton Plasma Physics Laboratory

252

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 44 (2004) S254S265 PII: S0029-5515(04)88685-X  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion is a target that has been compressed and heated to fusion conditions by the energy input of the driver been compressed and heated to fusion conditions by the energy input of the driver beams. A target

Tillack, Mark

253

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 45 (2005) 685693 doi:10.1088/0029-5515/45/7/018  

E-Print Network [OSTI]

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 1 Associazione EURATOM-ENEA sulla Fusione, Centro Ricerche di Frascati, C.P. 65-00044 Frascati, Rome, Italy 2 Institute of Plasma Physics and Laser Microfusion, PO Box 49, PL-00-908, Warsaw, Poland Received

Vlad, Gregorio

254

INSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion 43 (2003) 982988 PII: S0029-5515(03)66862-6  

E-Print Network [OSTI]

. For the out-shifted, shaped plasma, ripple loss of high energy ions during neutral beam injection (NBIINSTITUTE OF PHYSICS PUBLISHING and INTERNATIONAL ATOMIC ENERGY AGENCY NUCLEAR FUSION Nucl. Fusion is analysed. PACS numbers: 52.55.Fa, 52.55.Wq, 52.25.Fi 1. Introduction The construction of HL-2A [1

Budny, Robert

255

Utility of Social Modeling in Assessment of a States Propensity for Nuclear Proliferation  

SciTech Connect (OSTI)

This report is the third and final report out of a set of three reports documenting research for the U.S. Department of Energy (DOE) National Security Administration (NASA) Office of Nonproliferation Research and Development NA-22 Simulations, Algorithms, and Modeling program that investigates how social modeling can be used to improve proliferation assessment for informing nuclear security, policy, safeguards, design of nuclear systems and research decisions. Social modeling has not to have been used to any significant extent in a proliferation studies. This report focuses on the utility of social modeling as applied to the assessment of a State's propensity to develop a nuclear weapons program.

Coles, Garill A.; Brothers, Alan J.; Whitney, Paul D.; Dalton, Angela C.; Olson, Jarrod; White, Amanda M.; Cooley, Scott K.; Youchak, Paul M.; Stafford, Samuel V.

2011-06-01T23:59:59.000Z

256

Heterogeneous nuclear reactor models for optimal xenon control  

SciTech Connect (OSTI)

In this study a thermal nuclear reactor is modeled as a two-dimensional lattice of fuel and control rods placed in an infinite-moderator in plane geometry. The two-group diffusion theory approximation is used for neutron transport. Space-time neutron balance equations are written for two groups and reduced to one space-time algebraic equation by using the two-dimensional Fourier transform. This equation is written at all fuel and control rod locations. Iodine-xenon and promethium-samarium dynamic equations are also written at fuel rod locations only. These equations are then linearized about an equilibrium point which is determined from the steady-state form of the original nonlinear system equations. After studying poisonless criticality, with and without control, and the stability of the open-loop system and after checking its controllability, a performance criterion is defined for the xenon-induced spatial flux oscillation problem in the form of a functional to be minimized. Linear-quadratic optimal control theory is then applied to solve the problem.

Gondal, I.A.

1984-01-01T23:59:59.000Z

257

Two- and three-dimensional numerical models of internal tide generation at a continental slope  

Science Journals Connector (OSTI)

Some numerical models of internal tide generation at a continental slope are two-dimensional where the along-slope variation is neglected. The energy flux carried by internal tides computed using such two-dimensional models is often underestimated, compared with three-dimensional simulations of the same region, by a factor of 10 or more. The reason for this difference is investigated using both numerical and analytical models. It is shown that in numerical models, it is not the lack of the along-shelf forcing but the use of sponge or radiating conditions at the cross-shelf boundaries that leads to the severe underestimate of the offshore flux. To obtain realistic estimates of energy flux a three-dimensional model with an along-shelf scale of at least 5 internal tide wave lengths at the depth of maximum forcing is necessary.

K. Katsumata

2006-01-01T23:59:59.000Z

258

Using Direct Sub-Level Entity Access to Improve Nuclear Stockpile Simulation Modeling  

SciTech Connect (OSTI)

Direct sub-level entity access is a seldom-used technique in discrete-event simulation modeling that addresses the accessibility of sub-level entity information. The technique has significant advantages over more common, alternative modeling methods--especially where hierarchical entity structures are modeled. As such, direct sub-level entity access is often preferable in modeling nuclear stockpile, life-extension issues, an area to which it has not been previously applied. Current nuclear stockpile, life-extension models were demonstrated to benefit greatly from the advantages of direct sub-level entity access. In specific cases, the application of the technique resulted in models that were up to 10 times faster than functionally equivalent models where alternative techniques were applied. Furthermore, specific implementations of direct sub-level entity access were observed to be more flexible, efficient, functional, and scalable than corresponding implementations using common modeling techniques. Common modeling techniques (''unbatch/batch'' and ''attribute-copying'') proved inefficient and cumbersome in handling many nuclear stockpile modeling complexities, including multiple weapon sites, true defect analysis, and large numbers of weapon and subsystem types. While significant effort was required to enable direct sub-level entity access in the nuclear stockpile simulation models, the enhancements were worth the effort--resulting in more efficient, more capable, and more informative models that effectively addressed the complexities of the nuclear stockpile.

Robert Y. Parker

1999-08-01T23:59:59.000Z

259

Nuclear reactor with internal thimble-type delayed neutron detection system  

DOE Patents [OSTI]

This invention teaches improved apparatus for the method of detecting a breach in cladded fuel used in a nuclear reactor. The detector apparatus is located in the primary heat exchanger which conveys part of the reactor coolant past at least three separate delayed-neutron detectors mounted in this heat exchanger. The detectors are spaced apart such that the coolant flow time from the core to each detector is different, and these differences are known. The delayed-neutron activity at the detectors is a function of the delay time after the reaction in the fuel until the coolant carrying the delayed-neutron emitter passes the respective detector. This time delay is broken down into separate components including an isotopic holdup time required for the emitter to move through the fuel from the reaction to the coolant at the breach, and two transit times required for the emitter now in the coolant to flow from the breach to the detector loop and then via the loop to the detector. At least two of these time components are determined during calibrated operation of the reactor. Thereafter during normal reactor operation, repeated comparisons are made by the method of regression approximation of the third time component for the best-fit line correlating measured delayed-neutron activity against activity that is approximated according to specific equations. The equations use these time-delay components and known parameter values of the fuel and of the part and emitting daughter isotopes.

Gross, Kenny C. (Lemont, IL); Poloncsik, John (Downers Grove, IL); Lambert, John D. B. (Wheaton, IL)

1990-01-01T23:59:59.000Z

260

ccsd00001474, Model-independent tracking of criticality signals in nuclear multifragmentation data  

E-Print Network [OSTI]

parameter, de#28;ning two di#27;erent regimes at low and high incident energy, respectively, according of nuclear mul- tifragmentation reactions as observed in intermediate en- ergy heavy-ion collisions [1ccsd­00001474, version 2 ­ 6 Sep 2004 Model-independent tracking of criticality signals in nuclear

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

TAMCN: a tool for aggregate modeling of civil nuclear materials  

E-Print Network [OSTI]

involved in the creation, storage, and utilization of potentially destructive nuclear material. Western Europe and Japan, namely France, Belgium, the United Kingdom, Germany, Switzerland, and Japan, were chosen as a starting point because the issues...

Watson, Aaron Michael

2002-01-01T23:59:59.000Z

262

Dynamical Modeling of Economy in Global Nuclear Energy Market  

Science Journals Connector (OSTI)

Non-linear dynamical analysis for the global nuclear energy market is investigated. Currently, the market means a different characteristics comparing to the ... between two countries, which depends on the energy ...

Taeho Woo

2012-01-01T23:59:59.000Z

263

Modelling Power Output at Nuclear Power Plant by Neural Networks  

Science Journals Connector (OSTI)

In this paper, we propose two different neural network (NN) approaches for industrial process signal forecasting. Real data is available for this research from boiling water reactor type nuclear power reactors. N...

Jaakko Talonen; Miki Sirola; Eimontas Augilius

2010-01-01T23:59:59.000Z

264

An XFEM Model for Carbon Sequestration Journal: International Journal for Numerical Methods in Engineering  

E-Print Network [OSTI]

PeerReview Only An XFEM Model for Carbon Sequestration Journal: International Journal for Numerical method, Carbon Sequestration, Multiphase flow, XFEM, Multifield systems, Petrov-Galerkin httpScience (www.interscience.wiley.com). DOI: 10.1002/nme An XFEM Model for Carbon Sequestration Chris Ladubec

Gracie, Robert

265

A Planar Anode -Supported Solid Oxide Fuel Cell Model with Internal Reforming of Natural Gas  

E-Print Network [OSTI]

1 A Planar Anode - Supported Solid Oxide Fuel Cell Model with Internal Reforming of Natural Gas of natural gas has been developed. The model simultaneously solves mass, energy transport equations emission level, and multiple fuel utilization. SOFC can operate with various kinds of fuels such as natural

Boyer, Edmond

266

INTERNATIONAL DEPENDENCY AND STRUCTURE MODELLING CONFERENCE, DSM'10 22 23 JULY 2010, CAMBRIDGE, UK  

E-Print Network [OSTI]

DSM'10 1 12 TH INTERNATIONAL DEPENDENCY AND STRUCTURE MODELLING CONFERENCE, DSM'10 22 ­ 23 JULY the feasibility and benefit of applying the Dependency Structure Matrix (DSM) as the modelling platform of the scores of all the value flows along that path. This is because under the #12;DSM'10 2 multipl

de Weck, Olivier L.

267

High-energy nuclear quasielastic reactions: Decisive tests of nuclear-binding/pion models of the European Muon Collaboration effect  

Science Journals Connector (OSTI)

The light-cone nucleon momentum distributions obtained from nonrelativistic spectral functions or given by nuclear-binding/pion models are often used to analyze high-Q2 quasielastic and deep-inelastic (e,e) reactions. We demonstrate that in such models the presence of non-nucleonic components causes the scattering from forward and backward moving target protons to be significantly different. Other models do not have this property. The sensitivity of current (e,ep) and (p,pp) color transparency experiments is sufficient to observe these differences.

L. Frankfurt; G. A. Miller; M. Strikman

1992-01-06T23:59:59.000Z

268

High energy nuclear quasielastic reactions: Decisive tests of nuclear binding/pion models of the EMC effect  

SciTech Connect (OSTI)

The light-cone nucleon momentum distributions obtained from non- relativistic spectral functions or given by nuclear binding/pion models are often used to analyze high Q{sup 2} quasi-elastic and deep-inelastic (e,e{prime}) reactions. We demonstrate that in such models the presence of non-nucleonic components causes the scattering from forward and backward moving target protons to be significantly different. Other models do not have this property. The sensitivity of current (e,e{prime}p) and (p,pp) color transparency experiments is sufficient to observe these differences.

Frankfurt, L; Strikman, M [Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory AN SSSR, Leningrad (USSR). Inst. Yadernoj Fiziki; Miller, G A [Washington Univ., Seattle, WA (United States). Inst. for Nuclear Theory

1991-01-01T23:59:59.000Z

269

Nuclear weapons, the end of the cold war, and the future of the international system  

SciTech Connect (OSTI)

The collapse of empires, the overthrow of dynasties, the outbreak of plagues, the onset of revolutions, and even the improvement of the human condition itself - all of these are categories of events, which means that they have happened before and will almost certainly happen again. There are very few occurrences of which it can be said that nothing like them has ever taken place; but surely what took place in the New Mexico desert on July 16, 1945, qualifies as such as occurrence. The first test explosion of an atomic bomb, together with the actual use of that weapon three weeks later against the Japanese cities of Hiroshima and Nagasaki, was as sharp a break from the past as any in all of history. Theory had intersected reality to produce a weapon that was regarded at the time as unlike any other that had ever been invented, and that is still so regarded today, almost half a century later. The result, it now appears, has been a fundamental, and possibly permanent, change in human behavior. `The unleashed power of the atom has changed everything save our modes of thinking,` Albert Einstein wrote in 1946, `and thus we drift toward unparalleled catastrophe.` Einstein would have been as surprised as anyone else who lived through the early Cold War years had he known that Nagasaki would be the last occasion upon which atomic weapons would be used in anger for at least the next four and one-half decades, despite the fact that the great geopolitical rivalry between the United States and the Soviet Union would drag on throughout that length of time. History is full of unexpected developments, but few have been as completely unexpected as that the great powers would produce some 70,000 nuclear weapons between the end of World War II and the present day, without a single one of them having been used. Perfecting the ultimate instrument of war had made the ancient institution of war, for the first time in history, obsolete. Or so it would appear. 23 refs.

Gaddis, J.L. [Ohio Univ., Athens, OH (United States)

1992-12-31T23:59:59.000Z

270

Optimization Online - Augmented L1 and Nuclear-Norm Models with ...  

E-Print Network [OSTI]

Jan 22, 2012 ... Augmented L1 and Nuclear-Norm Models with a Globally Linearly Convergent Algorithm. Ming-Jun Lai (mjlai ***at*** math.uga.edu) Wotao Yin...

Ming-Jun Lai

2012-01-22T23:59:59.000Z

271

A Model-Based Signal Processing Approach to Nuclear Explosion Monitoring  

SciTech Connect (OSTI)

This report describes research performed under Laboratory Research and Development Project 05-ERD-019, entitled ''A New Capability for Regional High-Frequency Seismic Wave Simulation in Realistic Three-Dimensional Earth Models to Improve Nuclear Explosion Monitoring''. A more appropriate title for this project is ''A Model-Based Signal Processing Approach to Nuclear Explosion Monitoring''. This project supported research for a radically new approach to nuclear explosion monitoring as well as allowed the development new capabilities in computational seismology that can contribute to NNSA/NA-22 Programs.

Rodgers, A; Harris, D; Pasyanos, M

2007-03-14T23:59:59.000Z

272

A modeling and control approach to advanced nuclear power plants with gas turbines  

Science Journals Connector (OSTI)

Abstract Advanced nuclear power plants are currently being proposed with a number of various designs. However, there is a lack of modeling and control strategies to deal with load following operations. This research investigates a possible modeling approach and load following control strategy for gas turbine nuclear power plants in order to provide an assessment way to the concept designs. A load frequency control strategy and average temperature control mechanism are studied to get load following nuclear power plants. The suitability of the control strategies and concept designs are assessed through linear stability analysis methods. Numerical results are presented on an advanced molten salt reactor concept as an example nuclear power plant system to demonstrate the validity and effectiveness of the proposed modeling and load following control strategies.

Gnyaz Ablay

2013-01-01T23:59:59.000Z

273

JournaL of Marine Research, 49, 635-658, 1991 Modeling of internal tides in fjords  

E-Print Network [OSTI]

in the presence of resonant internal tides, leading to intense wave-energy beams. An application to a Norwegian mixing. The model's greatest advantage is to provide the internal-tide energy distribution through- out thermocline (Golubev and Cherkesov, 1986). The propagation of the internal- tide energy from its place

Cushman-Roisin, Benoit

274

BATMANan R package for the automated quantification of metabolites from nuclear magnetic resonance spectra using a Bayesian model  

Science Journals Connector (OSTI)

......methods and its results on an example dataset fitting 26 metabolites are comparable...automated quantification of metabolites from nuclear magnetic resonance spectra using a Bayesian model. | Nuclear Magnetic Resonance (NMR) spectra are......

Jie Hao; William Astle; Maria De Iorio; Timothy M D Ebbels

2012-08-01T23:59:59.000Z

275

International Environmental Modelling and Software Society (iEMSs) 2010 International Congress on Environmental Modelling and Software  

E-Print Network [OSTI]

energy utilization is one of the most important aspects of green buildings. The wind and solar energy://www.iemss.org/iemss2010/index.php?n=Main.Proceedings Modelling and control of a hybrid renewable energy system to supply demand of a green-building H. Dagdouguia,b , R. Minciardia , A. Ouammia,c , M. Robbaa , R. Sacilea

Boyer, Edmond

276

A model for the cosmic creation of nuclear exergy  

Science Journals Connector (OSTI)

... Although the problem of cosmic exergy creation has not been widely discussed, general answers have been given by Tolman3, and ... can be extracted from a system only to the extent that this deviates from equilibrium. Exergy is thus a measure of deviation from equilibrium, of contrast, internally or against an ...

K.-E. Eriksson, S. Islam, B.-S. Skagerstam

1982-04-08T23:59:59.000Z

277

International Fuel Services and Commercial Engagement | Department...  

Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

International Fuel Services and Commercial Engagement International Fuel Services and Commercial Engagement The Office of International Nuclear Energy Policy and Cooperation...

278

Transient modeling of thermionic space nuclear power systems  

E-Print Network [OSTI]

Thermionic Core-Converter 18 Neutron Kinetics . Active Length of the Core Inactive Length of the Core . . . Plena Inlet and Outlet to Core. . . . . . . . 21 . . . 22 . . . . . 22 Radiator Assembly. Radiator 23 23 Headers Inlet and Outlet... Temperature for the Loss of Flow Transient 37 tx Figure 13. Efficiency of the Thermionic Converters for the Loss of Flow Transient. . Page 38 14. Core Thermal Power Profile for the Power Start-up of the TOPAZ II Space Nuclear Power System. 15. Pump...

Berge, Francoise M

1991-01-01T23:59:59.000Z

279

AN ARTIFICIAL NEURAL NETWORK FOR DIMENSIONS AND COST MODELLING OF INTERNAL MICRO-CHANNELS  

E-Print Network [OSTI]

AN ARTIFICIAL NEURAL NETWORK FOR DIMENSIONS AND COST MODELLING OF INTERNAL MICRO Engineering, Dublin City University, Dublin, Ireland ABSTRACT For micro-channel fabrication using laser micro evaluation. Artificial Neural Network (ANN) is one of the numerical methodologies that can be utilised

Lee, Hyowon

280

Turbulent models of ice giant internal dynamics: Dynamos, heat transfer, and zonal flows  

E-Print Network [OSTI]

Turbulent models of ice giant internal dynamics: Dynamos, heat transfer, and zonal flows K Magnetic fields a b s t r a c t The ice giant planets, Uranus and Neptune, have magnetic fields to yield small-scale and disorganized turbulence. In agreement with ice giant observations, both

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

International Conference on Microwave and RF Heating MODELING OF A CYLINDRICAL APPLICATOR WITH THE  

E-Print Network [OSTI]

by comprehensive modeling specifying appropriate parameters of the excitation system and monitoring the electric10th International Conference on Microwave and RF Heating and experimentally. It appears that because of the uniform electric field distribution along the axis of the cylinder

Yakovlev, Vadim

282

MODELLING OF CONCRETE STRUCTURES AFFECTED BY INTERNAL SWELLING REACTIONS: COUPLINGS BETWEEN  

E-Print Network [OSTI]

, France Abstract Alkali Aggregate Reaction (AAR) and Delayed Ettringite Formation (DEF) cause expansion Ettringite Formation, Modelling, Coupling 1. INTRODUCTION Alkali Aggregate Reaction (AAR) and Delayed Ettringite Formation (DEF) are both Internal Swelling Processes (ISP) that can affect concrete. In the first

Paris-Sud XI, Université de

283

Security Science & Technology | Nuclear Science | ORNL  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Consequence Management, Safeguards, and Non-Proliferation Tools Export Control Human Reliability International Collaborations on Nuclear Safeguards Nuclear Forensics Radiation...

284

Survey of thermal-hydraulic models of commercial nuclear power plants  

SciTech Connect (OSTI)

A survey of the thermal-hydraulic models of nuclear power plants has been performed to identify the NRC`s current analytical capabilities for critical event response. The survey also supports ongoing research for accident management. The results of the survey are presented here. The PC database which records detailed data on each model is described.

Determan, J.C.; Hendrix, C.E.

1992-12-01T23:59:59.000Z

285

Survey of thermal-hydraulic models of commercial nuclear power plants  

SciTech Connect (OSTI)

A survey of the thermal-hydraulic models of nuclear power plants has been performed to identify the NRC's current analytical capabilities for critical event response. The survey also supports ongoing research for accident management. The results of the survey are presented here. The PC database which records detailed data on each model is described.

Determan, J.C.; Hendrix, C.E.

1992-12-01T23:59:59.000Z

286

GASFLOW: A computational model to analyze accidents in nuclear containment and facility buildings  

SciTech Connect (OSTI)

GASFLOW is a finite-volume computer code that solves the time-dependent, compressible Navier-Stokes equations for multiple gas species. The fluid-dynamics algorithm is coupled to the chemical kinetics of combusting liquids or gases to simulate diffusion or propagating flames in complex geometries of nuclear containment or confinement and facilities` buildings. Fluid turbulence is calculated to enhance the transport and mixing of gases in rooms and volumes that may be connected by a ventilation system. The ventilation system may consist of extensive ductwork, filters, dampers or valves, and fans. Condensation and heat transfer to walls, floors, ceilings, and internal structures are calculated to model the appropriate energy sinks. Solid and liquid aerosol behavior is simulated to give the time and space inventory of radionuclides. The solution procedure of the governing equations is a modified Los Alamos ICE`d-ALE methodology. Complex facilities can be represented by separate computational domains (multiblocks) that communicate through overlapping boundary conditions. The ventilation system is superimposed throughout the multiblock mesh. Gas mixtures and aerosols are transported through the free three-dimensional volumes and the restricted one-dimensional ventilation components as the accident and fluid flow fields evolve. Combustion may occur if sufficient fuel and reactant or oxidizer are present and have an ignition source. Pressure and thermal loads on the building, structural components, and safety-related equipment can be determined for specific accident scenarios. GASFLOW calculations have been compared with large oil-pool fire tests in the 1986 HDR containment test T52.14, which is a 3000-kW fire experiment. The computed results are in good agreement with the observed data.

Travis, J.R. [Science Applications International Corp., Albuquerque, NM (United States); Nichols, B.D.; Wilson, T.L.; Lam, K.L.; Spore, J.W.; Niederauer, G.F. [Los Alamos National Lab., NM (United States)

1993-07-01T23:59:59.000Z

287

GASFLOW: A computational model to analyze accidents in nuclear containment and facility buildings  

SciTech Connect (OSTI)

GASFLOW is a finite-volume computer code that solves the time-dependent, compressible Navier-Stokes equations for multiple gas species. The fluid-dynamics algorithm is coupled to the chemical kinetics of combusting liquids or gases to simulate diffusion or propagating flames in complex geometries of nuclear containment or confinement and facilities' buildings. Fluid turbulence is calculated to enhance the transport and mixing of gases in rooms and volumes that may be connected by a ventilation system. The ventilation system may consist of extensive ductwork, filters, dampers or valves, and fans. Condensation and heat transfer to walls, floors, ceilings, and internal structures are calculated to model the appropriate energy sinks. Solid and liquid aerosol behavior is simulated to give the time and space inventory of radionuclides. The solution procedure of the governing equations is a modified Los Alamos ICE'd-ALE methodology. Complex facilities can be represented by separate computational domains (multiblocks) that communicate through overlapping boundary conditions. The ventilation system is superimposed throughout the multiblock mesh. Gas mixtures and aerosols are transported through the free three-dimensional volumes and the restricted one-dimensional ventilation components as the accident and fluid flow fields evolve. Combustion may occur if sufficient fuel and reactant or oxidizer are present and have an ignition source. Pressure and thermal loads on the building, structural components, and safety-related equipment can be determined for specific accident scenarios. GASFLOW calculations have been compared with large oil-pool fire tests in the 1986 HDR containment test T52.14, which is a 3000-kW fire experiment. The computed results are in good agreement with the observed data.

Travis, J.R. (Science Applications International Corp., Albuquerque, NM (United States)); Nichols, B.D.; Wilson, T.L.; Lam, K.L.; Spore, J.W.; Niederauer, G.F. (Los Alamos National Lab., NM (United States))

1993-01-01T23:59:59.000Z

288

Nuclear Science & Technology  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear Science & Technology Nuclear Science & Technology Nuclear Science & Technology1354608000000Nuclear Science & TechnologySome of these resources are LANL-only and will require Remote Access. /No/ Nuclear Science & Technology Some of these resources are LANL-only and will require Remote Access. Key Resources Databases Organizations Journals Key Resources International Atomic Energy Agency IAEA scientific and technical publications cover areas of nuclear power, radiation therapy, nuclear security, nuclear law, and emergency repose. Search under Publications/Books and Reports for scientific books, standards, technical guides and reports National Nuclear Data Center Nuclear physics data for basic nuclear research and for applied nuclear technologies, operated by Brookhaven.

289

Anonymous nuclear loci in non-model organisms: making the most of high-throughput genome surveys  

Science Journals Connector (OSTI)

......de novo and anonymous nuclear loci (ANL) are proving...produce robust multilocus datasets. Results: By successively...129-142. Anonymous nuclear loci in non-model...de novo and anonymous nuclear loci (ANL) are proving...produce robust multilocus datasets. RESULTS: By successively......

Terry Bertozzi; Kate L. Sanders; Mark J. Sistrom; Michael G. Gardner

2012-07-15T23:59:59.000Z

290

Two novel procedures for aggregating randomized model ensemble outcomes for robust signal reconstruction in nuclear power plants monitoring systems  

E-Print Network [OSTI]

reconstruction in nuclear power plants monitoring systems P. Baraldi1 , E. Zio1,* , G. Gola2 , D. Roverso2 , M importance for the safe and reliable operation of nuclear power plants. Auto-associative regression models of nuclear power plants for it allows the timely detection of malfunctions and anomalies during operation

Paris-Sud XI, Université de

291

Antiferromagnet-based nuclear spin model of scalable quantum register with inhomogeneous magnetic field  

E-Print Network [OSTI]

As a nuclear spin model of scalable quantum register, the one-dimensional chain of the magnetic atoms with nuclear spins 1/2 substituting the basic atoms in the plate of nuclear spin free easy-axis 3D antiferromagnet is considered. It is formulated the generalized antiferromagnet Hamiltonian in spin-wave approximation (low temperatures) considering the inhomogeneous external magnetic field, which is directed along the easy axis normally to plane of the plate and has a constant gradient along the nuclear spin chain. Assuming a weak gradient, the asymptotic expression for coefficients of unitary transformations to the diagonal form of antiferromagnet Hamiltonian is found. With this result the expression for indirect interspin coupling, which is due to hyperfine nuclear electron coupling in atoms and the virtual spin wave propagation in antiferromagnet ground state, was evaluated. It is shown that the inhomogeneous magnetic field essentially modifies the characteristics of indirect interspin coupling. The indirect interaction essentially grows and even oscillates in relation to the interspin distance when the local field value in the middle point of two considered nuclear spin is close to the critical field for quantum phase transition of spin-flop type in bulk antiferromagnet or close to antiferromagnetic resonance. Thus, the external magnetic field, its gradient, microwave frequency and power can play the role of control parameters for qubit states. Finally, the one and two qubit states decoherence and longitudinal relaxation rate are caused by the interaction of nuclear spins with virtual spin waves in antiferromagnet ground state are calculated.

A. A. Kokin; V. A. Kokin

2008-12-01T23:59:59.000Z

292

Modelling of the internal dynamics and density in a tens of joules plasma focus device  

SciTech Connect (OSTI)

Using MHD theory, coupled differential equations were generated using a lumped parameter model to describe the internal behaviour of the pinch compression phase in plasma focus discharges. In order to provide these equations with appropriate initial conditions, the modelling of previous phases was included by describing the plasma sheath as planar shockwaves. The equations were solved numerically, and the results were contrasted against experimental measurements performed on the device PF-50J. The model is able to predict satisfactorily the timing and the radial electron density profile at the maximum compression.

Marquez, Ariel [CNEA and Instituto Balseiro, 8402 Bariloche (Argentina); Gonzalez, Jose [INVAP-CONICET and Instituto Balseiro, 8402 Bariloche, Argentina. (Argentina); Tarifeno-Saldivia, Ariel; Pavez, Cristian; Soto, Leopoldo [CCHEN, Comision Chilena de Energia Nuclear, Casilla 188-D, Santiago (Chile); Center for Research and Applications in Plasma Physics and Pulsed Power, P4 (Chile); Clausse, Alejandro [CNEA-CONICET and Universidad Nacional del Centro, 7000 Tandil (Argentina)

2012-01-15T23:59:59.000Z

293

Modelling of the internal dynamics and density in a tens of joules plasma focus device  

Science Journals Connector (OSTI)

Using MHD theory coupled differential equations were generated using a lumped parameter model to describe the internal behaviour of the pinch compression phase in plasma focus discharges. In order to provide these equations with appropriate initial conditions the modelling of previous phases was included by describing the plasma sheath as planar shockwaves. The equations were solved numerically and the results were contrasted against experimental measurements performed on the device PF-50J. The model is able to predict satisfactorily the timing and the radial electron density profile at the maximum compression.

Ariel Mrquez; Jos Gonzlez; Ariel Tarifeo-Saldivia; Cristian Pavez; Leopoldo Soto; Alejandro Clausse

2012-01-01T23:59:59.000Z

294

Nano-Continuum Modeling of a Nuclear Glass Specimen Altered for 25 Years  

SciTech Connect (OSTI)

The purpose of this contribution is to report on preliminary nano-continuum scale modeling of nuclear waste glass corrosion. The focus of the modeling is an experiment involving a French glass SON68 specimen leached for 25 years in a granitic environment. In this report, we focus on capturing the nano-scale concentration profiles. We use a high resolution continuum model with a constant grid spacing of 1 nanometer to investigate the glass corrosion mechanisms.

Steefel, Carl

2014-01-06T23:59:59.000Z

295

Accurate shell-model nuclear matrix elements for neutrinoless double-beta decay  

E-Print Network [OSTI]

We investigate a novel method of accurate calculation of the neutrinoless double-$\\beta$ decay shell-model nuclear matrix elements for the experimentally relevant case of $^{76}$Ge. We demonstrate that with the new method the nuclear matrix elements have perfect convergence properties and, using only the first 100 intermediate states of each spin, the matrix elements can be calculated with better than 1% accuracy. Based on the analysis of neutrinoless double-beta decays of $^{48}$Ca, $^{82}$Se, and $^{76}$Ge isotopes, we propose a new method to estimate the optimal values of the average closure energies at which the closure approximation gives the most accurate nuclear matrix elements. We also analyze the nuclear matrix elements for the heavy-neutrino-exchange mechanism, and we show that our method can be used to quench contributions from different intermediate spin states.

R. A. Sen'kov; M. Horoi

2014-11-06T23:59:59.000Z

296

Comparative study of three-nucleon force models in nuclear matter  

E-Print Network [OSTI]

We calculate the energy per particle of symmetric nuclear matter and pure neutron matter using the microscopic many-body Brueckner-Hartree-Fock (BHF) approach and employing the Argonne V18 (AV18) nucleon-nucleon (NN) potential supplemented with two different three-nucleon force models recently constructed to reproduce the binding energy of $^3$H, $^3$He and $^4$He nuclei as well as the neutron-deuteron doublet scattering length. We find that none of these new three-nucleon force models is able to reproduce simultaneously the empirical saturation point of symmetric nuclear matter and the properties of three- and four-nucleon systems.

Logoteta, Domenico; Bombaci, Ignazio; Kievsky, Alejandro

2015-01-01T23:59:59.000Z

297

An international land-biosphere model benchmarking activity for the IPCC Fifth Assessment Report (AR5)  

SciTech Connect (OSTI)

The need to capture important climate feedbacks in general circulation models (GCMs) has resulted in efforts to include atmospheric chemistry and land and ocean biogeochemistry into the next generation of production climate models, called Earth System Models (ESMs). While many terrestrial and ocean carbon models have been coupled to GCMs, recent work has shown that such models can yield a wide range of results (Friedlingstein et al., 2006). This work suggests that a more rigorous set of global offline and partially coupled experiments, along with detailed analyses of processes and comparisons with measurements, are needed. The Carbon-Land Model Intercomparison Project (C-LAMP) was designed to meet this need by providing a simulation protocol and model performance metrics based upon comparisons against best-available satellite- and ground-based measurements (Hoffman et al., 2007). Recently, a similar effort in Europe, called the International Land Model Benchmark (ILAMB) Project, was begun to assess the performance of European land surface models. These two projects will now serve as prototypes for a proposed international land-biosphere model benchmarking activity for those models participating in the IPCC Fifth Assessment Report (AR5). Initially used for model validation for terrestrial biogeochemistry models in the NCAR Community Land Model (CLM), C-LAMP incorporates a simulation protocol for both offline and partially coupled simulations using a prescribed historical trajectory of atmospheric CO2 concentrations. Models are confronted with data through comparisons against AmeriFlux site measurements, MODIS satellite observations, NOAA Globalview flask records, TRANSCOM inversions, and Free Air CO2 Enrichment (FACE) site measurements. Both sets of experiments have been performed using two different terrestrial biogeochemistry modules coupled to the CLM version 3 in the Community Climate System Model version 3 (CCSM3): the CASA model of Fung, et al., and the carbon-nitrogen (CN) model of Thornton. Comparisons of the CLM3 offline results against observational datasets have been performed and are described in Randerson et al. (2009). CLM version 4 has been evaluated using C-LAMP, showing improvement in many of the metrics. Efforts are now underway to initiate a Nitrogen-Land Model Intercomparison Project (N-LAMP) to better constrain the effects of the nitrogen cycle in biosphere models. Presented will be new results from C-LAMP for CLM4, initial N-LAMP developments, and the proposed land-biosphere model benchmarking activity.

Hoffman, Forrest M [ORNL; Randerson, James T [ORNL; Thornton, Peter E [ORNL; Bonan, Gordon [National Center for Atmospheric Research (NCAR); Erickson III, David J [ORNL; Fung, Inez [University of California, Berkeley

2009-12-01T23:59:59.000Z

298

Fuel cycle modelling of open cycle thorium-fuelled nuclear energy systems  

Science Journals Connector (OSTI)

Abstract In this study, we have sought to determine the advantages, disadvantages, and viability of open cycle thoriumuranium-fuelled (ThU-fuelled) nuclear energy systems. This has been done by assessing three such systems, each of which requires uranium enriched to ?20% 235U, in comparison to a reference uranium-fuelled (U-fuelled) system over various performance indicators, spanning material flows, waste composition, economics, and proliferation resistance. The values of these indicators were determined using the UK National Nuclear Laboratorys fuel cycle modelling code ORION. This code required the results of lattice-physics calculations to model the neutronics of each nuclear energy system, and these were obtained using various nuclear reactor physics codes and burn-up routines. In summary, all three ThU-fuelled nuclear energy systems required more separative work capacity than the equivalent benchmark U-fuelled system, with larger levelised fuel cycle costs and larger levelised cost of electricity. Although a reduction of ?6% in the required uranium ore per kWh was seen for one of the ThU-fuelled systems compared to the reference U-fuelled system, the other two ThU-fuelled systems required more uranium ore per kWh than the reference. Negligible advantages and disadvantages were observed for the amount and the properties of the spent nuclear fuel (SNF) generated by the systems considered. Two of the ThU-fuelled systems showed some benefit in terms of proliferation resistance of the SNF generated. Overall, it appears that there is little merit in incorporating thorium into nuclear energy systems operating with open nuclear fuel cycles.

S.F. Ashley; B.A. Lindley; G.T. Parks; W.J. Nuttall; R. Gregg; K.W. Hesketh; U. Kannan; P.D. Krishnani; B. Singh; A. Thakur; M. Cowper; A. Talamo

2014-01-01T23:59:59.000Z

299

Holifield Radioactive Ion Beam Facility A leading international facility with unique capabilities for research in nuclear structure  

E-Print Network [OSTI]

questions that drive the field of low-energy nuclear physics: · How do protons and neutrons make stable Directions Nuclear structure and reaction research at HRIBF provides insight into the nature of the force species are available as low-energy (~50 keV) beams. More than 60 post-accelerated beams, including 132 Sn

300

International Atomic Energy Agency specialists meeting on experience in ageing, maintenance, and modernization of instrumentation and control systems for improving nuclear power plant availability  

SciTech Connect (OSTI)

This report presents the proceedings of the Specialist`s Meeting on Experience in Aging, Maintenance and Modernization of Instrumentation and Control Systems for Improving Nuclear Power Plant Availability that was held at the Ramada Inn in Rockville, Maryland on May 5--7, 1993. The Meeting was presented in cooperation with the Electric Power Research Institute, Oak Ridge National Laboratory and the International Atomic Energy Agency. There were approximately 65 participants from 13 countries at the Meeting. Individual reports have been cataloged separately.

Not Available

1993-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Civilian Nuclear Programs  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Civilian Nuclear Programs Civilian Nuclear Programs Civilian Nuclear Programs Los Alamos is committed to using its advanced nuclear expertise and unique facilities to meet the civilian nuclear national security demands of the future. CONTACT US Program Director Bruce Robinson (505) 667-1910 Email Los Alamos partners extensively with other laboratories, universities, industry, and the international nuclear community to address real-world technical challenges The Civilian Nuclear Programs Office is the focal point for nuclear energy research and development and next-generation repository science at Los Alamos National Laboratory. The Civilian Nuclear Programs Office manages projects funded by the Department of Energy's offices of Nuclear Energy Environmental Management Nuclear Regulatory Commission

302

Internal efficiency of InGaN light-emitting diodes: Beyond a quasiequilibrium model  

SciTech Connect (OSTI)

We propose a model to better investigate InGaN light-emitting diode (LED) internal efficiency by extending beyond the usual total carrier density rate equation approach. To illustrate its capability, the model is applied to study intrinsic performance differences between violet and green LEDs. The simulations show performance differences, at different current densities and temperatures, arising from variations in spontaneous emission and heat loss rates. By tracking the momentum-resolved carrier populations, these rate changes are, in turn, traced to differences in bandstructure and plasma heating. The latter leads to carrier distributions that deviate from the quasiequilibrium ones at lattice temperature.

Chow, Weng W.; Crawford, Mary H.; Tsao, Jeffrey Y.; Kneissl, Michael

2010-01-01T23:59:59.000Z

303

The Community Earth System Model (CESM) Large Ensemble Project: A Community Resource for Studying Climate Change in the Presence of Internal Climate Variability  

Science Journals Connector (OSTI)

While internal climate variability is known to affect climate projections, its influence is often underappreciated and confused with model error. Why? In general, modeling centers contribute a small number of realizations to international climate ...

J. E. Kay; C. Deser; A. Phillips; A. Mai; C. Hannay; G. Strand; J. M. Arblaster; S. C. Bates; G. Danabasoglu; J. Edwards; M. Holland; P. Kushner; J.-F. Lamarque; D. Lawrence; K. Lindsay; A. Middleton; E. Munoz; R. Neale; K. Oleson; L. Polvani; M. Vertenstein

304

A Comparison Between Model Reduction and Controller Reduction: Application to a PWR Nuclear Planty  

E-Print Network [OSTI]

A Comparison Between Model Reduction and Controller Reduction: Application to a PWR Nuclear Planty@csam.ucl.ac.be, Gevers@csam.ucl.ac.be 2 Electricite de France, Direction des Etudes et Recherches, 6 Quai Watier, F-78041 of a controller for the secondary circuit of a nu- clear Pressurized Water Reactor, leading to the conclu- sions

Gevers, Michel

305

Aspects of operational radiation protection during dismantling of nuclear facilities relevant for the estimation of internal doses  

Science Journals Connector (OSTI)

......its decommissioning plan. In that period...including clearance from regulatory control, and to...analysis includes a review of the documentation...decommissioning standard review plan. NUREG 1727. 6...Journal Article Review | Humans Nuclear......

T. Labarta

2007-04-01T23:59:59.000Z

306

United States-Republic of Korea (ROK) International Nuclear Energy Research Initiative (INERI) Annual Steering Committee Meeting  

Broader source: Energy.gov [DOE]

On November 17-18, 2014, the Department of Energys Office of Nuclear Energy (DOE/NE) hosted the annual U.S.-ROK INERI Steering Committee meeting in Washington, D.C. The Steering Committee...

307

Correlated basis function results for the Argonne models of nuclear matter  

Science Journals Connector (OSTI)

Correlated basis function calculations of the binding energy, the optical potential and the self-energy of nuclear matter models based on the Argonne ?14 interaction are presented. The results obtained are compared with the existing correlated basis calculations performed for corresponding models based on the Urbana ?14 potential. The two potentials lead to significative differences in the self-energy and related quantities. The results show an overall agreement with calculations based on Brueckner-Hartree-Fock theory.

A. Fabrocini; S. Fantoni

1993-01-01T23:59:59.000Z

308

Caloric Curves for small systems in the Nuclear Lattice Gas Model  

E-Print Network [OSTI]

For pedagogical reasons we compute the caloric curve for 11 particles in a $3^3$ lattice. Monte-Carlo simulation can be avoided and exact results are obtained. There is no back-bending in the caloric curve and negative specific heat does not appear. We point out that the introduction of kinetic energy in the nuclear Lattice Gas Model modifies the results of the standard Lattice Gas Model in a profound way.

C. B. Das; S. Das Gupta

2000-09-27T23:59:59.000Z

309

Deputy Secretary Poneman to Attend International Framework for...  

Office of Environmental Management (EM)

Poneman to Attend International Framework for Nuclear Energy Cooperation Meeting in Jordan Deputy Secretary Poneman to Attend International Framework for Nuclear Energy...

310

Deputy Secretary Poneman's Remarks at the International Conference...  

Broader source: Energy.gov (indexed) [DOE]

International Conference on Access to Civil Nuclear Energy Deputy Secretary Poneman's Remarks at the International Conference on Access to Civil Nuclear Energy March 8, 2010 -...

311

Collaborating Organizations - Nuclear Data Program, Nuclear Engineering  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Collaborating Organizations Collaborating Organizations Nuclear Data Program Overview Current Projects & Recent Activities Collaborating Organizations Publications Nuclear Data Measurements (NDM) Reports Experimental Nuclear Data Resources Contact ND Program Related Resources Other Major Programs Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE Division on Flickr Nuclear Data Program Collaborating Organizations Bookmark and Share National Nuclear Data Center, Brookhaven National Laboratory, Upton, New York. International Nuclear Structure and Decay Data Network, coordinated by IAEA, Vienna, Austria Heavy-Ion Nuclear Physics Group, Physics Division, Argonne National Laboratory, Argonne, Illinois. Nuclear Spectroscopy Group, Department of Nuclear Physics,

312

High-energy nuclear collisions in the geometrical branching model  

Science Journals Connector (OSTI)

The geometrical branching model, which has been successful in describing multiparticle production in hadron-hadron and hadron-nucleus collisions, is extended to the case of nucleus-nucleus collisions at high energy. We discuss the issue related to the collision between broken nucleons. The calculated result is in good agreement with the data. We show that the multiplicity and transverse-energy distributions of the produced particles are insensitive to the detail properties of hadronization. Measurable quantities that could reveal relevant information on them are suggested.

Rudolph C. Hwa and Xin-Nian Wang

1990-09-01T23:59:59.000Z

313

Monte Carlo methods for the nuclear shell model  

E-Print Network [OSTI]

We present novel Monte Carlo methods for treating the interacting shell model that allow exact calculations much larger than those heretofore possible. The two-body interaction is linearized by an auxiliary field; Monte Carlo evaluation of the resulting functional integral gives ground-state or thermal expectation values of few-body operators. The ``sign problem'' generic to quantum Monte Carlo calculations is absent in a number of cases. We discuss the favorable scaling of these methods with nucleon numb er and basis size and their suitability to parallel computation.

C. W. Johnson; S. E. Koonin; G. H. Lang; W. E. Ormand

1992-10-20T23:59:59.000Z

314

LANL | Nuclear Design and Risk Analysis, D-5 | Home Page  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear Design and Risk Analysis, D-5 Nuclear Design and Risk Analysis, D-5 Home About Us CAPABILITIES Computational Fluid Dynamics International Nuclear Risk Analysis Nuclear Facility Safety Nuclear Reactor Safety/ Risk Analysis Nuclear Weapons Safety Programmatic Risk Analysis Radiation Transport Modeling (MCNPX) Risk Based Decision Support Seismic Risk Analysis Small Reactor Design CONTACTS Group Leader Pratap Sadasivan (505) 665-5853 Deputy Group Leader Jay Elson Office Administrator Amanda Braithwaite Innovative design and analysis of nuclear systems The Nuclear Design and Risk Analysis Group (D-5) is a multidisciplinary team of scientists and engineers. We provide modeling and analysis capabilities to design and evaluate the potential risks of complex systems, with a focus on nuclear systems. D-5 goes beyond just providing an answer: we provide answers in the context of the overall decision process. We ensure that decision makers have all of the knowledge available to make an informed regulatory, design, or risk decision.

315

Microsoft PowerPoint - International Projects1.pptm.ppt  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

International Program International Program Modeling Activities Boris Faybishenko Lawrence Berkeley National Laboratory Berkeley, CA DOE-EM Project Managers- Kurt Gerdes and Skip Chamberlain Performance Assessment Community of Practice Technical Exchange April 13-14, 2010, Richland, WA Outline * Review of projects formerly supported by DOE-EM * Potential International Projects and Analogue Case Studies for ASCEM - Chernobyl Cooling Pond, Ukraine - Nonclassical transport modeling-project with the Nuclear Safety Institute of RAS, Russia - Uranium Mine and Mills Tailing's Covers * Central Asia--Kazakhstan, Tajikistan, Kyrgyzstan, and Uzbekistan - Cementitious Materials for Long-Term Storage and Disposal * Conclusions and Recommendations Overall Objectives of DOE-EM International Program Modeling Activities

316

EIA - International Energy Outlook 2008-Appendix J. Models Used To Generate  

Gasoline and Diesel Fuel Update (EIA)

J. Models Used To Generate the IEO2008 Projections J. Models Used To Generate the IEO2008 Projections International Energy Outlook 2008 Appendix J. Models Used To Generate the IEO2008 Projections World Energy Projections Plus (WEPS+) The IEO2008 projections of world energy consumption and supply were generated from EIA’s World Energy Projections Plus (WEPS+) model. WEPS+ is a system of sectoral energy models that provide a loosely linked, integrated equilibrium modeling system. It is used primarily to provide alternative energy projections based on different assumptions for GDP growth and fossil fuel prices. The WEPS+ common platform allows the models to communicate with each other and provides a comprehensive, central series of output reports for analysis. For IEO2008, WEPS+ incorporates a separate transportation sector model with an extensive level of detail for modes and vehicle types. WEPS+ also incorporates some additional detail on industrial energy use in China and India, additional detail on end-use electricity consumption, and an interface to the System for the Analysis of Global Energy Markets/Global Electricity Module (see below) for generation, capacity, and fuel consumption in the electricity sector.

317

4th International Workshop on Equation-Based Object-Oriented Modeling Languages and Tools, September, 2011, ETH Zrich, Switzerland.  

E-Print Network [OSTI]

4th International Workshop on Equation-Based Object-Oriented Modeling Languages and Tools is an equation-based, object- oriented mathematical modeling language suited to modeling complex physical systems in Modelica Toby Myers1 Wladimir Schamai2 Peter Fritzson3 1 Institute of Intelligent and Integrated Systems

Zhao, Yuxiao

318

A cellular automaton model for the change of public attitude regarding nuclear energy  

Science Journals Connector (OSTI)

A model was constructed to investigate how the public opinion on nuclear energy varies depending upon information environment and personal communication between people. Here the nuclear risk informed of by the newsmedia and the frequency of anti-nuclear movements are treated as exogenous variables. The information environment is assumed to be represented in terms of public opinion as well as those exogenous variables, and the public are assumed to vary, randomly but homogeneously in a global sense, their attitude regarding nuclear energy in accordance with the strength of information environment. Personal communication begins round some opinion leaders who were excited by the information environment, and the attitude of the public who are affected by the opinion leaders are secondarily changed to anti-nuclear or pronuclear states. Moreover the public attitude is also changed naturally in an exponential way with time. Public opinion is supposed to appear as a superposed result of these three modes of attitudinal change. Such public opinion is fed back to the information environment. All the treatments are discretized and the process of personal communication is modeled by the cellular automaton method. Each cell in this approach is assumed to take one discrete state of six possible states which represent the status of public opinion. Model constants are determined by fitting calculations to the actual fraction of opinion in Japan. From simulation with this model, the following become clear: (i) The society is a highly non-linear system with a self-organizing potential: (ii) In the society composed of one type of constituent members with a homogeneous characteristic, the trend of public opinion is catastrophically turned over only when the effort for ameliorating the public acceptance extended over a long period of time, such as education, persuasion and advertisement, exceeds a certain threshold, and (iii) in the case when the amount of information on nuclear risk released from the newsmedia is reduced continuously from now on, the acceptability of nuclear energy is remarkably improved so far as the extent of the reduction exceeds a certain threshold.

Teruaki Ohnishi

1991-01-01T23:59:59.000Z

319

Magnetic moment of hyperons in nuclear matter by using quark-meson coupling models  

E-Print Network [OSTI]

We calculate the magnetic moments of hyperons in dense nuclear matter by using relativistic quark models. Hyperons are treated as MIT bags, and the interactions are considered to be mediated by the exchange of scalar and vector mesons which are approximated as mean fields. Model dependence is investigated by using the quark-meson coupling model and the modified quark-meson coupling model; in the former the bag constant is independent of density and in the latter it depends on density. Both models give us the magnitudes of the magnetic moments increasing with density for most octet baryons. But there is a considerable model dependence in the values of the magnetic moments in dense medium. The magnetic moments at the nuclear saturation density calculated by the quark meson coupling model are only a few percents larger than those in free space, but the magnetic moments from the modified quark meson coupling model increase more than 10% for most hyperons. The correlations between the bag radius of hyperons and the magnetic moments of hyperons in dense matter are discussed.

C. Y. Ryu; C. H. Hyun; T. -S. Park; S. W. Hong

2008-06-06T23:59:59.000Z

320

Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear  

Broader source: Energy.gov (indexed) [DOE]

Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear Safeguards Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear Safeguards GNEP will help prevent misuse of civilian nuclear facilities for nonpeaceful purposes by developing enhanced safeguards programs and technologies. International nuclear safeguards are integral to implementing the GNEP vision of a peaceful expansion of nuclear energy and demonstration of more proliferation-resistant fuel cycle technologies. Global Nuclear Energy Partnership Fact Sheet - Develop Enhanced Nuclear Safeguards More Documents & Publications GNEP Element:Develop Enhanced Nuclear Safeguards Global Nuclear Energy Partnership Fact Sheet Global Nuclear Energy Partnership Fact Sheet - Demonstrate Small-Scale

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

Workshop materials from the 2nd international training course on physical protection of nuclear facilities and materials, Module 13  

SciTech Connect (OSTI)

This course is intended for representatives of countries where nuclear power is being developed and whose responsibilities include the preparation of regulation and the design and evaluation of physical protection systems. This is the second of two volumes; the first volume is SAND-79-1090. (DLC)

Martin, F. P. [ed.

1980-04-01T23:59:59.000Z

322

$?$-mass Modification in $He^3$ - a Signal of Restoration of Chiral Symmetry or Test for Nuclear Matter Models ?  

E-Print Network [OSTI]

Two recent experiments have demonstrated that the effective $\\rho$-mass in nuclear medium, as extracted from the $^3He(\\gamma, \\pi^+ \\pi^-)$ reaction, is substantially reduced. This has been advocated as an indication of partial restoration of chiral symmetry in nuclear matter. We show that even in the absence of chiral symmetry, effective mean field nuclear matter models can explain these findings quantitatively.

Abhijit Bhattacharyya; Sanjay K. Ghosh; Sibaji Raha

1999-02-23T23:59:59.000Z

323

Coulomb energy of a proton in the relativistic nuclear shell model  

Science Journals Connector (OSTI)

We examine the Dirac equation for a proton in a nucleus, with a shell-model potential consisting of nuclear and Coulomb parts. When the Dirac equation is reduced to a Schrdinger-like equation, the effective potential W in it exhibits two Coulomb-related effects that are absent in the usual nonrelativistic treatment: (I) W contains a Coulomb-nuclear interference term; (II) W depends strongly on the proton energy, which in turn depends on the Coulomb energy. If the shell-model potential consists of a strongly attractive Lorentz scalar and a strongly repulsive Lorentz vector, effect I by itself is very large. However, effect II counteracts effect I, leaving a small yet significant decrease in the Coulomb energy as compared with its nonrelativistic counterpart.

Y. Nogami and F. M. Toyama

1990-12-01T23:59:59.000Z

324

Nuclear modification factors of pion and light nuclei in a framework of thermal model  

E-Print Network [OSTI]

The particle yields and the nuclear modification factor ($R_{cp}$) for $\\pi^\\pm$, $p(\\bar p)$, $d(\\bar d)$, $t(\\bar t)$ and $^3He(\\bar{^3He})$ are studied in Au + Au collisions at $\\sqrt{S_{NN}}$ = 200 GeV/c based on the blast-wave model and nucleonic coalescence model. The influences of resonance decay on $p(\\bar p)$ and $\\pi$ yields, $p/\\pi$-ratio and nuclear modification factors have been discussed. An apparent number-of-constituent-quark scaling of $R_{cp}$ for $p(\\bar p)$ and $\\pi$ is presented. Similarly, the number-of-nucleon scaling of $R_{cp}$ for $p(\\bar p)$, $d(\\bar d)$, $t(\\bar t)$ and $^3He(\\bar{^3He})$ is also addressed.

Zhou, C S; Zhang, S

2015-01-01T23:59:59.000Z

325

The impact of global nuclear mass model uncertainties on $r$-process abundance predictions  

E-Print Network [OSTI]

Rapid neutron capture or `$r$-process' nucleosynthesis may be responsible for half the production of heavy elements above iron on the periodic table. Masses are one of the most important nuclear physics ingredients that go into calculations of $r$-process nucleosynthesis as they enter into the calculations of reaction rates, decay rates, branching ratios and Q-values. We explore the impact of uncertainties in three nuclear mass models on $r$-process abundances by performing global monte carlo simulations. We show that root-mean-square (rms) errors of current mass models are large so that current $r$-process predictions are insufficient in predicting features found in solar residuals and in $r$-process enhanced metal poor stars. We conclude that the reduction of global rms errors below $100$ keV will allow for more robust $r$-process predictions.

Mumpower, M; Aprahamian, A

2014-01-01T23:59:59.000Z

326

Analytical expressions of the dispersive contributions of the nuclear optical model  

E-Print Network [OSTI]

Analytical solutions of dispersion relations in the nuclear optical model have been found for both imaginary volume and surface potentials. A standard Brown-Rho shape has been assumed for the volume imaginary term and a Brown-Rho shape multiplied by a decreasing exponential for the surface contribution. The analytical solutions are valid for any even value of the exponent appearing in these functional forms.

J. M. Quesada; R. Capote; J. Raynal; A. Molina; M. Lozano

2002-10-23T23:59:59.000Z

327

Consequence modeling for nuclear weapons probabilistic cost/benefit analyses of safety retrofits  

SciTech Connect (OSTI)

The consequence models used in former studies of costs and benefits of enhanced safety retrofits are considered for (1) fuel fires; (2) non-nuclear detonations; and, (3) unintended nuclear detonations. Estimates of consequences were made using a representative accident location, i.e., an assumed mixed suburban-rural site. We have explicitly quantified land- use impacts and human-health effects (e.g. , prompt fatalities, prompt injuries, latent cancer fatalities, low- levels of radiation exposure, and clean-up areas). Uncertainty in the wind direction is quantified and used in a Monte Carlo calculation to estimate a range of results for a fuel fire with uncertain respirable amounts of released Pu. We define a nuclear source term and discuss damage levels of concern. Ranges of damages are estimated by quantifying health impacts and property damages. We discuss our dispersal and prompt effects models in some detail. The models used to loft the Pu and fission products and their particle sizes are emphasized.

Harvey, T.F.; Peters, L.; Serduke, F.J.D.; Hall, C.; Stephens, D.R.

1998-01-01T23:59:59.000Z

328

Proceedings of the Numerical Modeling for Underground Nuclear Test Monitoring Symposium  

SciTech Connect (OSTI)

The purpose of the meeting was to discuss the state-of-the-art in numerical simulations of nuclear explosion phenomenology with applications to test ban monitoring. We focused on the uniqueness of model fits to data, the measurement and characterization of material response models, advanced modeling techniques, and applications of modeling to monitoring problems. The second goal of the symposium was to establish a dialogue between seismologists and explosion-source code calculators. The meeting was divided into five main sessions: explosion source phenomenology, material response modeling, numerical simulations, the seismic source, and phenomenology from near source to far field. We feel the symposium reached many of its goals. Individual papers submitted at the conference are indexed separately on the data base.

Taylor, S.R.; Kamm, J.R. [eds.

1993-11-01T23:59:59.000Z

329

EIA - International Energy Outlook 2009-Appendix J. Models Used To Generate  

Gasoline and Diesel Fuel Update (EIA)

J. Models Used To Generate the IEO2009 Projections J. Models Used To Generate the IEO2009 Projections International Energy Outlook 2009 Appendix J. Models Used To Generate the IEO2009 Projections The IEO2009 projections of world energy consumption and supply were generated from EIA’s World Energy Projections Plus (WEPS+) model. WEPS+ consists of a system of individual sectoral energy models, using an integrated iterative solution process that allows for convergence of consumption and prices to an equilibrium solution. It is used primarily to provide alternative energy projections based on different assumptions for GDP growth and fossil fuel prices and can also be used to perform other analyses. WEPS+ produces projections for 16 regions or countries of the world, including North America (United States, Canada, and Mexico), OECD Europe, OECD Asia (Japan, South Korea, and Australia/New Zealand), Russia, other non-OECD Europe and Eurasia, China, India, other non-OECD Asia, Brazil, and other Central and South America. Currently, the projections extend to 2030.

330

A general numerical solution of dispersion relations for the nuclear optical model  

E-Print Network [OSTI]

A general numerical solution of the dispersion integral relation between the real and the imaginary parts of the nuclear optical potential is presented. Fast convergence is achieved by means of the Gauss-Legendre integration method, which offers accuracy, easiness of implementation and generality for dispersive optical model calculations. The use of this numerical integration method in the optical-model parameter search codes allows for a fast and accurate dispersive analysis. PACS number(s): 11.55.Fv, 24.10.Ht, 02.60.Jh

Roberto Capote; Alberto Molina; Jose Manuel Quesada

2001-05-09T23:59:59.000Z

331

Generation IV International Forum Updates Technology Roadmap...  

Office of Environmental Management (EM)

nuclear energy Generation IV International Forum Signs Agreement to Collaborate on Sodium Cooled Fast Reactors China and Russia to Join the Generation IV International Forum...

332

Assessment of a pressurizer spray valve faulty opening transient at Asco Nuclear Power Plant with RELAP5/MOD2. International Agreement Report  

SciTech Connect (OSTI)

The Asociacion Nuclear Asco has prepared a model of Asco NPP using RELAP5/MOD2. This model, which include thermalhydraulics, kinetics and protection and controls, has been qualified in previous calculations of several actual plant transients. One of the transients of the qualification process is a ``Pressurizer spray valve faulty opening`` presented in this report. It consists in a primary coolant depressurization that causes the reactor trip by overtemperature and later on the actuation of the safety injection. The results are in close agreement with plant data.

Reventos, F.; Baptista, J.S.; Navas, A.P.; Moreno, P. [Asociacion Nuclear Asco, Barcelona (Spain)

1993-12-01T23:59:59.000Z

333

Resonant Generation of Internal Waves on a Model Continental Slope H. P. Zhang, B. King, and Harry L. Swinney  

E-Print Network [OSTI]

Resonant Generation of Internal Waves on a Model Continental Slope H. P. Zhang, B. King, and Harry wave generation in a laboratory model of oscillating tidal flow on a continental margin. Waves are found to be generated only in a near-critical region where the slope of the bottom topography matches

Texas at Austin. University of

334

Coastal numerical modelling of tides: Sensitivity to domain size and remotely generated internal tide  

Science Journals Connector (OSTI)

The propagation of remotely generated superinertial internal tides constitutes a difficulty for the modelling of regional ocean tidal variability which we illustrate in several ways. First, the M2 tidal solution inside a control region located along the Southern California Bight coastline is monitored while the extent of the numerical domain is increased (up to 512 512 km). While the amplitude and phase of sea level averaged over the region is quasi-insensitive to domain size, a steady increase of kinetic energy, predominantly baroclinic, is observed with increasing domain size. The increasing flux of energy into the control region suggests that this trend is explained by the growing contribution from remote generation sites of internal tide which can propagate up to the control region. Increasing viscosities confirms this interpretation by lowering baroclinic energy levels and limiting their rate of increase with domain size. Doubling the grid spacing allows consideration of numerical domains 2 times larger. While the coarse grid has lower energy levels than the finer grid, the rate of energy increase with domain size appears to be slowing for the largest domain of the coarse grid simulations. Forcing the smallest domain with depth-varying tidal boundary conditions from the simulation in the largest domain produces energy levels inside the control region comparable to those in the control region for the largest domain, thereby confirming the feasibility of a nested approach. In contrast, simulations forced with a subinertial tidal constituent (K1) show that when the propagation of internal tide is limited, the control region kinetic energy is mostly barotropic and the magnitudes of variations of the kinetic energy with domain size are reduced.

Aurelien L. Ponte; Bruce D. Cornuelle

2013-01-01T23:59:59.000Z

335

Low density instabilities in asymmetric nuclear matter within the quark-meson coupling (QMC) model with the {delta} meson  

SciTech Connect (OSTI)

In the present work we include the isovector-scalar {delta} meson in the quark-meson coupling (QMC) model and study the properties of asymmetric nuclear within QMC without and with the {delta} meson. Recent constraints set by isospin diffusion on the slope parameter of the nuclear symmetry energy at saturation density are used to adjust the model parameters. The thermodynamical spinodal surfaces are obtained and the instability region at subsaturation densities within QMC and QMC{delta} models are compared with mean-field relativistic models. The distillation effect in the QMC model is discussed.

Santos, Alexandre M.; Providencia, Constanca; Panda, Prafulla K. [Centro de Fisica Computacional, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal); Indian Association for the Cultivation of Science, Jadavpur, Kolkata-700 032, India and Centro de Fisica Computacional, Department of Physics, University of Coimbra, P-3004-516 Coimbra (Portugal)

2009-04-15T23:59:59.000Z

336

Emission of Light Fragments from Heavy Nuclei in High Energy Nuclear Reactions  

Science Journals Connector (OSTI)

......projectile is pointed out and a new model is presented. Some...relation between emitted high energy particles and nucleonic...International Conference on High Energy Physics and Nuclear Structure...Cosmic Radiation (1964) New York: reprinted by Dover Publications......

Tatsuoki Miyazima; Ksuke Nakamura; Yasuhiko Futami

1965-01-01T23:59:59.000Z

337

A new coal-permeability model: Internal swelling stress and fracture-matrix interaction  

SciTech Connect (OSTI)

We have developed a new coal-permeability model for uniaxial strain and constant confining stress conditions. The model is unique in that it explicitly considers fracture-matrix interaction during coal deformation processes and is based on a newly proposed internal-swelling stress concept. This concept is used to account for the impact of matrix swelling (or shrinkage) on fracture-aperture changes resulting from partial separation of matrix blocks by fractures that do not completely cut through the whole matrix. The proposed permeability model is evaluated with data from three Valencia Canyon coalbed wells in the San Juan Basin, where increased permeability has been observed during CH{sub 4} gas production, as well as with published data from laboratory tests. Model results are generally in good agreement with observed permeability changes. The importance of fracture-matrix interaction in determining coal permeability, demonstrated in this work using relatively simple stress conditions, underscores the need for a dual-continuum (fracture and matrix) mechanical approach to rigorously capture coal-deformation processes under complex stress conditions, as well as the coupled flow and transport processes in coal seams.

Liu, H.H.; Rutqvist, J.

2009-10-01T23:59:59.000Z

338

International Conference on Mathematics, Computational Methods & Reactor Physics (M&C 2009) Saratoga Springs, New York, May 3-7, 2009, on CD-ROM, American Nuclear Society, LaGrange Park, IL (2009)  

E-Print Network [OSTI]

International Conference on Mathematics, Computational Methods & Reactor Physics (M&C 2009 reactor core simulation system aims to meet this need. As a convenient trade- off between accuracy operator such as EDF, the time required to compute nuclear reactor core simulations is rather critical

Vialle, Stéphane

339

Nuclear Nonproliferation Program Offices | National Nuclear Security  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nonproliferation Program Offices | National Nuclear Security Nonproliferation Program Offices | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Nuclear Nonproliferation Program Offices Home > About Us > Our Programs > Nonproliferation > Nuclear Nonproliferation Program Offices Nuclear Nonproliferation Program Offices One of the gravest threats the United States and the international

340

Nuclear Nonproliferation Program Offices | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Nonproliferation Program Offices | National Nuclear Security Nonproliferation Program Offices | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Nuclear Nonproliferation Program Offices Home > About Us > Our Programs > Nonproliferation > Nuclear Nonproliferation Program Offices Nuclear Nonproliferation Program Offices One of the gravest threats the United States and the international

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Recent developments of the cascade-exciton model of nuclear reactions  

SciTech Connect (OSTI)

Recent developments of the Cascade-Exciton Model (CEM) of nuclear reactions are described. The improved cascade-exciton model as implemented in the code CEM97 differs from the CEM95 version by incorporating new approximations for the elementary cross sections used in the cascade, using more precise values for nuclear masses and pairing energies, using corrected systematics for the level-density parameters, and several other refinements. We have improved algorithms used in many subroutines, decreasing the computing time by up to a factor of 6 for heavy targets. We describe a number of further improvements and changes to CEM97, motivated by new data on isotope production measured at GSI. This leads us to CEM2k, a new version of the CEM code. CEM2k has a longer cascade stage, less preequilibrium emission, and evaporation from more highly excited compound nuclei compared to earlier versions. CEM2k also has other improvements and allows us to better model neutron, radionuclide, and gas production in ATW spallation targets. The increased accuracy and predictive power of the code CEM2k are shown by several examples. Further necessary work is outlined. KEYWORDS: Intranuclear cascade, preequilibrium, evaporation, and fission reactions, Monte Carlo simulations, cascade-exciton model, particle spectra, spallation and fission cross sections, GSI data

Mashnik, S. G. (Stepan G.); Sierk, A. J. (Arnold J.)

2001-01-01T23:59:59.000Z

342

SC e-journals, Nuclear  

Office of Scientific and Technical Information (OSTI)

Nuclear Nuclear Annals of Nuclear Energy Annual Review of Nuclear and Particle Science Atomic Data & Nuclear Data Tables Atomic Energy BMC Medical Physics - OAJ Cancer Prevention Journals Portal Cancer Prevention Research Cancer Reviews Online Dose Response Energy & Environmental Science Energy Policy EURASIP Journal on Advances in Signal Processing - OAJ EURASIP Journal on Bioinformatics and Systems Biology - OAJ EURASIP Journal on Embedded Systems (2006 forward) - OAJ Fuel Fusion Engineering and Design Fusion Nuclear Society Health Physics IETE Journal of Research - OAJ International Journal of Cancer International Journal of Low Radiation International Journal of Microwave Science and Technology - OAJ International Journal of Radiation Biology Journal of Cancer Eqidemiology - OAJ

343

Nuclear Physics: A Key Ingredient in Astrophysical Modeling F.-K. Thielemann, D. Argast, F. Brachwitz, J.L. Fisker, C. Frohlich, R. Hirschi, E.  

E-Print Network [OSTI]

1 Nuclear Physics: A Key Ingredient in Astrophysical Modeling F.-K. Thielemann, D. Argast, F of Physics & Astronomy, Univ. of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland Nuclear physics. In this review we will survey how these aspects of nuclear physics enter the modeling of astrophysical objects. 1

Rauscher, Thomas

344

THE STRUCTURAL CHEMISTRY OF MOLYBDENUM IN MODEL HIGH LEVEL NUCLEAR WASTE GLASSES, INVESTIGATED BY MO K-EDGE X-RAY ABSORPTION  

E-Print Network [OSTI]

THE STRUCTURAL CHEMISTRY OF MOLYBDENUM IN MODEL HIGH LEVEL NUCLEAR WASTE GLASSES, INVESTIGATED of molybdenum in model UK high level nuclear waste glasses was investigated by X-ray Absorption Spectroscopy (XAS). Molybdenum K-edge XAS data were acquired from several inactive simulant high level nuclear waste

Sheffield, University of

345

Source Term Estimation of Radioxenon Released from the Fukushima Dai-ichi Nuclear Reactors Using Measured Air Concentrations and Atmospheric Transport Modeling  

SciTech Connect (OSTI)

Systems designed to monitor airborne radionuclides released from underground nuclear explosions detected radioactive fallout from the Fukushima Daiichi nuclear accident in March 2011. Atmospheric transport modeling (ATM) of plumes of noble gases and particulates were performed soon after the accident to determine plausible detection locations of any radioactive releases to the atmosphere. We combine sampling data from multiple International Modeling System (IMS) locations in a new way to estimate the magnitude and time sequence of the releases. Dilution factors from the modeled plume at five different detection locations were combined with 57 atmospheric concentration measurements of 133-Xe taken from March 18 to March 23 to estimate the source term. This approach estimates that 59% of the 1.241019 Bq of 133-Xe present in the reactors at the time of the earthquake was released to the atmosphere over a three day period. Source term estimates from combinations of detection sites have lower spread than estimates based on measurements at single detection sites. Sensitivity cases based on data from four or more detection locations bound the source term between 35% and 255% of available xenon inventory.

Eslinger, Paul W. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Biegalski, S. [Univ. of Texas at Austin, TX (United States); Bowyer, Ted W. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Cooper, Matthew W. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Haas, Derek A. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Hayes, James C. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Hoffman, Ian [Radiation Protection Bureau, Health Canada, Ottawa, ON (Canada); Korpach, E. [Radiation Protection Bureau, Health Canada, Ottawa, ON (Canada); Yi, Jing [Radiation Protection Bureau, Health Canada, Ottawa, ON (Canada); Miley, Harry S. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Rishel, Jeremy P. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Ungar, R. Kurt [Radiation Protection Bureau, Health Canada, Ottawa, ON (Canada); White, Brian [Radiation Protection Bureau, Health Canada, Ottawa, ON (Canada); Woods, Vincent T. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

2014-01-01T23:59:59.000Z

346

Hydrogen crossover and internal short-circuit currents experimental characterization and modelling in a proton exchange membrane fuel cell  

Science Journals Connector (OSTI)

Abstract Open circuit losses encompass a set of phenomena that reduce PEM fuel cell (PEMFC) efficiency, especially at low current densities. Properly modelling these losses is crucial for obtaining PEMFC models that reproduce accurately the experimental behaviour of \\{PEMFCs\\} operating at low current densities. The open circuit losses can be disaggregated into three distinct contributions: mixed potential, hydrogen crossovers and internal short-circuits. The aim of this work is to obtain a model for the anodic and the cathodic pressure effects on the hydrogen crossovers and the internal short-circuits in a commercial PEMFC. In order to achieve this goal, the hydrogen crossovers and the internal short-circuit were measured experimentally on a commercial PEMFC by linear voltammetry. The measurements were performed at a given temperature and gas inlet humidification level, for different anodic and cathodic pressures.

J.J. Giner-Sanz; E.M. Ortega; V. Prez-Herranz

2014-01-01T23:59:59.000Z

347

Quantitative Methodology for Assessing State-Level Nuclear Security Measures.  

E-Print Network [OSTI]

??The international community faces a growing threat from nuclear terrorism. The complexity of the threats of nuclear terrorism, the variety of nuclear security measures that (more)

Myers, Christopher 1985-

2012-01-01T23:59:59.000Z

348

Theory of nuclear reactions  

SciTech Connect (OSTI)

The book presents a theory of nuclear reaction. An account is given of the nonrelativistic nuclear reaction theory. The R - matrix description of nuclear reactions is considered and the dispersion method is formulated. Mechanisms of nuclear reactions and their relationship are studied in detail. Attention is paid to nuclear reactions involving the compound nuclear formation and to direct nuclear processes. The optical model the diffraction approach and high - energy diffraction nuclear processes involving composite particles are discussed.

Sitenko, A.G.

1990-01-01T23:59:59.000Z

349

Nuclear tools for characterising radiological dispersion in complex terrain: evaluation of regulatory and emergency response models  

Science Journals Connector (OSTI)

Routine operations of a nuclear research reactor and its facilities offer opportunities for collection of rare environmental tracer datasets which can be used for atmospheric dispersion model evaluation studies. The HIFAR reactor near Sydney, Australia, routinely emits the radioactive noble gas 41Ar, and other radionuclides such as 133Xe and 135Xe are also emitted from nearby radiopharmaceutical production facilities. Despite extremely low emission levels of these gases, they are nevertheless detectable using state-of-the-art technology, and sensitive detectors have been placed at four locations in the surrounding region which features complex terrain. The high research potential of this unique dataset is illustrated in the current study, in which predictions from two atmospheric dispersion models used for emergency response are compared with 41Ar peak observations from the detector network under a range of stability conditions, and long-term integrated data is also compared with a routine impact assessment model.

Alastair G. Williams; Geoffrey H. Clark; Leisa Dyer; Richard Barton

2005-01-01T23:59:59.000Z

350

Biokinetic and dosimetric modelling in the estimation of radiation risks from internal  

Science Journals Connector (OSTI)

The International Commission on Radiological Protection (ICRP) has developed biokinetic and dosimetric models that enable the calculation of organ and tissue doses for a wide range of radionuclides. These are used to calculate equivalent and effective dose coefficients (dose in SvBq?1 intake), considering occupational and environmental exposures. Dose coefficients have also been given for a range of radiopharmaceuticals used in diagnostic medicine. Using equivalent and effective dose, exposures from external sources and from different radionuclides can be summed for comparison with dose limits, constraints and reference levels that relate to risks from whole-body radiation exposure. Risk estimates are derived largely from follow-up studies of the survivors of the atomic bombings at Hiroshima and Nagasaki in 1945. New dose coefficients will be required following the publication in 2007 of new ICRP recommendations. ICRP biokinetic and dosimetric models are subject to continuing review and improvement, although it is arguable that the degree of sophistication of some of the most recent models is greater than required for the calculation of effective dose to a reference person for the purposes of regulatory control. However, the models are also used in the calculation of best estimates of doses and risks to individuals, in epidemiological studies and to determine probability of cancer causation. Models are then adjusted to best fit the characteristics of the individuals and population under consideration. For example, doses resulting from massive discharges of strontium-90 and other radionuclides to the Techa River from the Russian Mayak plutonium plant in the early years of its operation are being estimated using models adapted to take account of measurements on local residents and other population-specific data. Best estimates of doses to haemopoietic bone marrow, in utero and postnatally, are being used in epidemiological studies of radiation-induced leukaemia. Radon-222 is the one internal emitter for which control of exposure is based on direct information on cancer risks, with extensive information available on lung cancer induction by radon progeny in mines and consistent data on risks in homes. The dose per unit 222Rn exposure can be calculated by comparing lung cancer risk estimates derived for 222Rn exposure and for external exposure of the Japanese survivors. Remarkably similar values are obtained by this method and by calculations using the ICRP model of the respiratory tract, providing good support for model assumptions. Other informative comparisons with risks from external exposure can be made for Thorotrast-induced liver cancer and leukaemia, and radium-induced bone cancer. The bone-seeking alpha emitters, plutonium-239 and radium isotopes, are poorer leukaemogens than predicted by models. ICRP dose coefficients are published as single values without consideration of uncertainties. However, it is clear that full consideration of uncertainties is appropriate when considering best estimates of doses and risks to individuals or specific population groups. An understanding of the component uncertainties in the calculation of dose coefficients can be seen as an important goal and should help inform judgements on the control of exposures. The routine consideration of uncertainties in dose assessments, if achievable, would be of questionable value when doses are generally maintained at small fractions of limits.

John Harrison

2009-01-01T23:59:59.000Z

351

Uncertainty and sensitivity analysis of biokinetic models for radiopharmaceuticals used in nuclear medicine  

Science Journals Connector (OSTI)

......who undergo the diagnosis in nuclear medicine. Table-2. The...radiopharmaceuticals used in nuclear medicine. As an example...1976) New York: Society of Nuclear Medicine. MIRD pamphlet no...Uncertainty in Quantitative Risk and Policy Analysis. (1990) New York......

W. B. Li; C. Hoeschen

2010-01-01T23:59:59.000Z

352

Nuclear magnetic resonance characterization of peptide models of collagenfolding diseases  

Science Journals Connector (OSTI)

...Dobson, R. J. Ellis and A. R. Fersht Nuclear magnetic resonance characterization of...disease such as osteogenesis imperfecta. Nuclear magnetic resonance (NMR) studies of...can lead to pathological conditions. nuclear magnetic resonance|collagen|osteogenesis...

2001-01-01T23:59:59.000Z

353

An adaptive simulation model for analysis of nuclear material shipping operations  

SciTech Connect (OSTI)

Los Alamos has developed an advanced simulation environment designed specifically for nuclear materials operations. This process-level simulation package, the Process Modeling System (ProMoS), is based on high-fidelity material balance criteria and contains intrinsic mechanisms for waste and recycle flows, contaminant estimation and tracking, and material-constrained operations. Recent development efforts have focused on coupling complex personnel interactions, personnel exposure calculations, and stochastic process-personnel performance criteria to the material-balance simulation. This combination of capabilities allows for more realistic simulation of nuclear material handling operations where complex personnel interactions are required. They have used ProMoS to assess fissile material shipping performance characteristics at the Los Alamos National Laboratory plutonium facility (TA-55). Nuclear material shipping operations are ubiquitous in the DOE complex and require the largest suite of varied personnel interacting in a well-timed manner to accomplish the task. They have developed a baseline simulation of the present operations and have estimated the operational impacts and requirement of the pit production mission at TA-55 as a result of the SSM-PEIS. Potential bottlenecks have been explored and mechanisms for increasing operational efficiency are identified.

Boerigter, S.T.; Sena, D.J.; Fasel, J.H.

1998-12-31T23:59:59.000Z

354

Verifiable Fuel Cycle Simulation Model (VISION): A Tool for Analyzing Nuclear Fuel Cycle Futures  

SciTech Connect (OSTI)

The nuclear fuel cycle consists of a set of complex components that are intended to work together. To support the nuclear renaissance, it is necessary to understand the impacts of changes and timing of events in any part of the fuel cycle system such as how the system would respond to each technological change, a series of which moves the fuel cycle from where it is to a postulated future state. The system analysis working group of the United States research program on advanced fuel cycles (formerly called the Advanced Fuel Cycle Initiative) is developing a dynamic simulation model, VISION, to capture the relationships, timing, and changes in and among the fuel cycle components to help develop an understanding of how the overall fuel cycle works. This paper is an overview of the philosophy and development strategy behind VISION. The paper includes some descriptions of the model components and some examples of how to use VISION. For example, VISION users can now change yearly the selection of separation or reactor technologies, the performance characteristics of those technologies, and/or the routing of material among separation and reactor types - with the model still operating on a PC in <5 min.

Jacob J. Jacobson; Steven J. Piet; Gretchen E. Matthern; David E. Shropshire; Robert F. Jeffers; A. M. Yacout; Tyler Schweitzer

2010-11-01T23:59:59.000Z

355

Site-specific parameter values for the Nuclear Regulatory Commission's food pathway dose model  

SciTech Connect (OSTI)

Routine operations at the Savannah River Site (SRS) in Western South Carolina result in radionuclide releases to the atmosphere and to the Savannah River. The resulting radiation doses to the off-site maximum individual and the off-site population within 80 km of the SRS are estimated on a yearly basis. These estimates are currently generated using dose models prescribed for the commercial nuclear power industry by the Nuclear Regulatory Commission (NRC). The NRC provides default values for dose-model parameters for facilities without resources to develop site-specific values. A survey of land- and water-use characteristics for the Savannah River area has been conducted to determine site-specific values for water recreation, consumption, and agricultural parameters used in the NRC Regulatory Guide 1.109 (1977) dosimetric models. These site parameters include local characteristics of meat, milk, and vegetable production; recreational and commercial activities on the Savannah River; and meat, milk, vegetable, and seafood consumption rates. This paper describes how parameter data were obtained at the Savannah River Site and the impacts of such data on off-site dose. Dose estimates using site-specific parameter values are compared to estimates using the NRC default values.

Hamby, D.M. (Westinghouse Savannah River Company, Savannah River Laboratory, Aiken, SC (United States))

1992-02-01T23:59:59.000Z

356

System modeling for the advanced thermionic initiative single cell thermionic space nuclear reactor  

SciTech Connect (OSTI)

Incore thermionic space reactor design concepts which operate in a nominal power output range of 20 to 40 kWe are described. Details of the neutronics, thermionic, shielding, and heat rejection performance are presented. Two different designs, ATI-Driven and ATI-Driverless, are considered. Comparison of the core overall performance of these two configurations are described. The comparison of these two cores includes the overall conversion efficiency, reactor mass, shield mass, and heat rejection mass. An overall system design has been developed to model the advanced incore thermionic energy conversion based nuclear reactor systems for space applications in this power range.

Lee, H.H.; Lewis, B.R.; Klein, A.C. (Department of Nuclear Engineering, Oregon State University, Radiation Center, C116, Corvallis, Oregon 97331-5902 (United States)); Pawlowski, R.A. (Battelle Pacific Northwest Laboratories, Richland, Washington 99352 (United States))

1993-01-15T23:59:59.000Z

357

Heat pipe cooled heat rejection subsystem modelling for nuclear electric propulsion. Final report  

SciTech Connect (OSTI)

NASA LeRC is currently developing a FORTRAN based computer model of a complete nuclear electric propulsion (NEP) vehicle that can be used for piloted and cargo missions to the Moon or Mars. Proposed designs feature either a Brayton or a K-Rankine power conversion cycle to drive a turbine coupled with rotary alternators. Both ion and magnetoplasmodynamic (MPD) thrusters will be considered in the model. In support of the NEP model, Rocketdyne is developing power conversion, heat rejection, and power management and distribution (PMAD) subroutines. The subroutines will be incorporated into the NEP vehicle model which will be written by NASA LeRC. The purpose is to document the heat pipe cooled heat rejection subsystem model and its supporting subroutines. The heat pipe cooled heat rejection subsystem model is designed to provide estimate of the mass and performance of the equipment used to reject heat from Brayton and Rankine cycle power conversion systems. The subroutine models the ductwork and heat pipe cooled manifold for a gas cooled Brayton; the heat sink heat exchanger, liquid loop piping, expansion compensator, pump and manifold for a liquid loop cooled Brayton; and a shear flow condenser for a K-Rankine system. In each case, the final heat rejection is made by way of a heat pipe radiator. The radiator is sized to reject the amount of heat necessary.

Moriarty, M.P.

1993-11-01T23:59:59.000Z

358

Nuclear Energy Advanced Modeling and Simulation Waste Integrated Performance and Safety Codes (NEAMS Waste IPSC).  

SciTech Connect (OSTI)

The objective of the U.S. Department of Energy Office of Nuclear Energy Advanced Modeling and Simulation Waste Integrated Performance and Safety Codes (NEAMS Waste IPSC) is to provide an integrated suite of computational modeling and simulation (M&S) capabilities to quantitatively assess the long-term performance of waste forms in the engineered and geologic environments of a radioactive-waste storage facility or disposal repository. Achieving the objective of modeling the performance of a disposal scenario requires describing processes involved in waste form degradation and radionuclide release at the subcontinuum scale, beginning with mechanistic descriptions of chemical reactions and chemical kinetics at the atomic scale, and upscaling into effective, validated constitutive models for input to high-fidelity continuum scale codes for coupled multiphysics simulations of release and transport. Verification and validation (V&V) is required throughout the system to establish evidence-based metrics for the level of confidence in M&S codes and capabilities, including at the subcontiunuum scale and the constitutive models they inform or generate. This Report outlines the nature of the V&V challenge at the subcontinuum scale, an approach to incorporate V&V concepts into subcontinuum scale modeling and simulation (M&S), and a plan to incrementally incorporate effective V&V into subcontinuum scale M&S destined for use in the NEAMS Waste IPSC work flow to meet requirements of quantitative confidence in the constitutive models informed by subcontinuum scale phenomena.

Schultz, Peter Andrew

2011-12-01T23:59:59.000Z

359

Nano-Continuum Modeling of a Nuclear Glass Specimen Altered for 25 Years  

E-Print Network [OSTI]

Insight into silicate-glass corrosion mechanisms. NatureSantarini (2008). SON68 nuclear glass dissolution kinetics:B. (2006). Nuclear waste glasses How durable? Elements, 2,

Steefel, Carl

2014-01-01T23:59:59.000Z

360

3-D Earth model more accurately pinpoints explosions  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

3-D Earth model more accurately pinpoints explosions The purpose of this model is to assist the U.S. Air Force and the international Comprehensive Nuclear Test Ban Treaty...

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


361

International Activities | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

International Activities International Activities International Activities International Activities The International Program assists the DOE Office of Environmental Management (EM) in identifying technologies and strategies for waste processing, groundwater and soil remediation, spent nuclear fuel and surplus nuclear material disposition, and facility deactivation and decommissioning. The International Program seeks to transform advances in science and engineering into practical solutions for environmental remediation. Collaboration with governmental, academic, and industrial organizations in other countries expands the technical depth of the EM program. Working with the international community offers the opportunity to develop consensus on approaches to science, technology and policy for environmental

362

Post?installation activities in the Comprehensive Nuclear Test Ban Treaty (CTBT) International Monitoring System (IMS) infrasound network  

Science Journals Connector (OSTI)

The provisional operation and maintenance of IMS infrasound stations after installation and subsequent certification has the objective to prepare the infrasound network for entry into force of the Comprehensive Nuclear?Test?Ban Treaty (CTBT). The goal is to maintain and fine tune the technical capabilities of the network to repair faulty equipment and to ensure that stations continue to meet the minimum specifications through evaluation of data quality and station recalibration. Due to the globally dispersed nature of the network this program constitutes a significant undertaking that requires careful consideration of possible logistic approaches and their financial implications. Currently 11 of the 60 IMS infrasound stations are transmitting data in the post?installation Testing & Evaluation mode. Another 5 stations are under provisional operation and are maintained in post?certification mode. It is expected that 20% of the infrasound network will be certified by the end of 2002. This presentation will focus on the different phases of post?installation activities of the IMS infrasound program and the logistical challenges to be tackled to ensure a cost?efficient management of the network. Specific topics will include Testing & Evaluation and Certification of Infrasound Stations as well as Configuration Management and Network Sustainment.

2002-01-01T23:59:59.000Z

363

Nuclear-resonant electron scattering  

Science Journals Connector (OSTI)

We investigate nuclear-resonant electron scattering as occurring in the two-step process of nuclear excitation by electron capture (NEEC) followed by internal conversion. The nuclear excitation and decay are treated by a phenomenological collective model in which nuclear states and transition probabilities are described by experimental parameters. We present capture rates and resonant strengths for a number of heavy-ion collision systems considering various scenarios for the resonant electron-scattering process. The results show that for certain cases resonant electron scattering can have significantly larger resonance strengths than NEEC followed by the radiative decay of the nucleus. We discuss the impact of our findings on the possible experimental observation of NEEC.

Adriana Plffy and Zoltn Harman

2008-04-04T23:59:59.000Z

364

The 6th International Conference on Life Cycle Management in Gothenburg 2013 FROM DETAILED LCA TO SIMPLIFIED MODEL: AN ORIENTED  

E-Print Network [OSTI]

The 6th International Conference on Life Cycle Management in Gothenburg 2013 FROM DETAILED LCA.padey@mines-paristech.fr Keywords: Energy pathway; LCA; Simplified model; Global Sensitivity analysis ABSTRACT Literature reviews. This leads decision/policy makers to sometimes consider LCA as inconclusive. We developed a methodology

Boyer, Edmond

365

Asymptotic models for the generation of internal waves by a moving ship, and the dead-water phenomenon  

E-Print Network [OSTI]

Asymptotic models for the generation of internal waves by a moving ship, and the dead occurs when a ship sails in a stratified fluid, and experiences an important drag due to waves below is then provided, in order to predict the behavior of the flow and in which situations the dead-water effect

Boyer, Edmond

366

Internal Corrosion Analysis of Model 9975 Packaging Containing Pu or PuO{sub 2} During Shipping and Storage  

SciTech Connect (OSTI)

The Materials Consultation Group of SRTC has completed an internal corrosion analysis of the Model 9975 packaging assembly containing either Pu or PuO2 for storage in K Reactor under ambient conditions for a period of 12 years. The 12-year storage period includes two years for shipping and up to ten years for storage.

Vormelker, P.

1999-03-23T23:59:59.000Z

367

Ke Zhai and Jordan Boyd-Graber. Online Topic Models with Infinite Vocabulary. International Conference on Machine Learning, 2013.  

E-Print Network [OSTI]

Ke Zhai and Jordan Boyd-Graber. Online Topic Models with Infinite Vocabulary. International Conference on Machine Learning, 2013. @inproceedings{Zhai:Boyd-Graber-2013, Author = {Ke Zhai and Jordan Boyd@CS.UMD.EDU Department of Computer Science, University of Maryland, College Park, MD USA Jordan Boyd-Graber JBG

Boyd-Graber, Jordan

368

International Meeting on "Best Estimate" Methods in Nuclear Installation Safety Analysis (BE-2000) Washington, DC, November, 2000.  

E-Print Network [OSTI]

for their applicability to the automated assessment of the accu- racy of NRS code simulations, through direct comparisons with experimental measurements or other simulations. A variety of data types and computational modeling methods for executing ACAP on a large number of data sets. This enables its use in rapidly providing an automated

Kunz, Robert Francis

369

Nuclear Data Program - Nuclear Engineering Division (Argonne)  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Data Program Data Program Nuclear Data Program Overview Current Projects & Recent Activities Collaborating Organizations Publications Nuclear Data Measurements (NDM) Reports Experimental Nuclear Data Resources Contact ND Program Related Resources Other Major Programs Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE Division on Flickr Nuclear Data Program We contribute to the development of comprehensive nuclear reactions and nuclear structure databases, including nuclear data measurement, analysis, modeling and evaluation methodologies, that are implemented in basic science research and advanced nuclear technologies. Bookmark and Share Recent Events Nuclear Structure 2012 Conference Argonne National Laboratory hosted the

370

Fuel Performance Experiments and Modeling: Fission Gas Bubble Nucleation and Growth in Alloy Nuclear Fuels  

SciTech Connect (OSTI)

Advanced fast reactor systems being developed under the DOE's Advanced Fuel Cycle Initiative are designed to destroy TRU isotopes generated in existing and future nuclear energy systems. Over the past 40 years, multiple experiments and demonstrations have been completed using U-Zr, U-Pu-Zr, U-Mo and other metal alloys. As a result, multiple empirical and semi-empirical relationships have been established to develop empirical performance modeling codes. many mechamistic questions about fission as mobility, bubble coalescience, and gas release have been answered through industrial experience, reearch, and empirical understanding. The advent of modern computational materials science, however, opens new doors of development such that physics-based multi-scale models may be developed to enable a new generation of predictive fuel performance codes that are not limited by empiricism.

McDeavitt, Sean; Shao, Lin; Tsvetkov, Pavel; Wirth, Brian; Kennedy, Rory

2014-04-07T23:59:59.000Z

371

Recommendations for damping and treatment of modeling uncertainty in seismic analysis of CANDU nuclear power plant  

SciTech Connect (OSTI)

The seismic analysis of the CANDU nuclear power plant is governed by Canadian Standard series N289. However, the dynamic analysis of some equipment and system such as the CANDU reactor and fueling machine must treat unique components not directly covered by the broad recommendations of these standards. This paper looks at the damping values and treatment of modeling uncertainty recommended by CSA N289.3, the current state of knowledge and expert opinion as reflected in several current standards, testing results, and the unique aspects of the CANDU system. Damping values are recommended for the component parts of the CANDU reactor and fueling machine system: reactor building, calandria vault, calandria, fuel channel, pressure tube, fueling machine and support structure. Recommendations for treatment of modeling and other uncertainties are also presented.

Usmani, S.A. [Atomic Energy of Canada, Ltd., Mississauga, Ontario (Canada); Baughman, P.D. [EQE International, Stratham, NH (United States)

1996-12-01T23:59:59.000Z

372

FATE Unified Modeling Method for Spent Nuclear Fuel and Sludge Processing, Shipping and Storage - 13405  

SciTech Connect (OSTI)

A unified modeling method applicable to the processing, shipping, and storage of spent nuclear fuel and sludge has been incrementally developed, validated, and applied over a period of about 15 years at the US DOE Hanford site. The software, FATE{sup TM}, provides a consistent framework for a wide dynamic range of common DOE and commercial fuel and waste applications. It has been used during the design phase, for safety and licensing calculations, and offers a graded approach to complex modeling problems encountered at DOE facilities and abroad (e.g., Sellafield). FATE has also been used for commercial power plant evaluations including reactor building fire modeling for fire PRA, evaluation of hydrogen release, transport, and flammability for post-Fukushima vulnerability assessment, and drying of commercial oxide fuel. FATE comprises an integrated set of models for fluid flow, aerosol and contamination release, transport, and deposition, thermal response including chemical reactions, and evaluation of fire and explosion hazards. It is one of few software tools that combine both source term and thermal-hydraulic capability. Practical examples are described below, with consideration of appropriate model complexity and validation. (authors)

Plys, Martin; Burelbach, James; Lee, Sung Jin; Apthorpe, Robert [Fauske and Associates, LLC, 16W070 83rd St., Burr Ridge, IL, 60527 (United States)] [Fauske and Associates, LLC, 16W070 83rd St., Burr Ridge, IL, 60527 (United States)

2013-07-01T23:59:59.000Z

373

Compressor and Turbine Models of Brayton Units for Space Nuclear Power Systems  

SciTech Connect (OSTI)

Closed Brayton Cycles with centrifugal flow, single-shaft turbo-machines are being considered, with gas cooled nuclear reactors, to provide 10's to 100's of electrical power to support future space exploration missions and Lunar and Mars outposts. Such power system analysis is typically based on the cycle thermodynamics, for given operating pressures and temperatures and assumed polytropic efficiencies of the compressor and turbine of the Brayton energy conversion units. Thus the analysis results not suitable for modeling operation transients such as startup and changes in the electric load. To simulate these transients, accurate models of the turbine and compressor in the Brayton rotating unit, which calculate the changes in the compressor and turbine efficiencies with system operation are needed. This paper presents flow models that account for the design and dimensions of the compressor impeller and diffuser, and the turbine stator and rotor blades. These models calculate the various enthalpy losses and the polytropic efficiencies along with the pressure ratios of the turbine and compressor. The predictions of these models compare well with reported performance data of actual hardware. In addition, the results of a parametric analysis to map the operations of the compressor and turbine, as functions of the rotating shaft speed and inlet Mach number of the gas working fluid, are presented and discussed. The analysis used a binary mixture of He-Xe with a molecular weight of 40 g/mole as the working fluid.

Gallo, Bruno M.; El-Genk, Mohamed S.; Tournier, Jean-Michel [Institute for Space and Nuclear Power Studies, University of New Mexico, Albuquerque, NM, 87131 (United States); Chemical and Nuclear Engineering Department, University of New Mexico, Albuquerque, NM, 87131 (United States)

2007-01-30T23:59:59.000Z

374

Soft-Sphere Model for Nuclear Quadrupole Resonance: Rare-Earth Trichlorides under Hydrostatic Pressure  

Science Journals Connector (OSTI)

Nuclear quadrupole resonance of Cl35 in five hexagonal rare-earth trichlorides under hydro-static pressure up to 5103 kg/cm2 showed a decrease in frequency ? with increase in pressure. The normalized pressure coefficients ?0-1(???P)T varied smoothly between the extremes (-5.586 0.020) (10-6 cm2/kg) and (-3.855 0.016) (10-6 cm2/kg) for CeCl3 and GdCl3, respectively. The negative sign suggested a model with a significant overlap contribution to the electric field gradient and a soft-sphere model was developed in analogy to the Born-Mayer model of inter-ionic repulsive forces. This model proved adequate to explain the systematic variations in ?Q with compound and was consistent with the pressure dependence of ?. The use of pressure data as a critical test for the model must await reliable compressibility data for the compounds. Pressure data for monoclinic ErCl3 and YbCl3 are also presented.

David H. Current; C. L. Foiles; Edward H. Carlson

1972-08-01T23:59:59.000Z

375

Experiments to investigate direct containment heating phenomena with scaled models of the Surry Nuclear Power Plant  

SciTech Connect (OSTI)

The Containment Technology Test Facility (CTTF) and the Surtsey Test Facility at Sandia National Laboratories are used to perform scaled experiments that simulate High Pressure Melt Ejection accidents in a nuclear power plant (NPP). These experiments are designed to investigate the effects of direct containment heating (DCH) phenomena on the containment load. High-temperature, chemically reactive melt (thermite) is ejected by high-pressure steam into a scale model of a reactor cavity. Debris is entrained by the steam blowdown into a containment model where specific phenomena, such as the effect of subcompartment structures, prototypic air/steam/hydrogen atmospheres, and hydrogen generation and combustion, can be studied. Four Integral Effects Tests (IETs) have been performed with scale models of the Surry NPP to investigate DCH phenomena. The 1/61{sup th} scale Integral Effects Tests (IET-9, IET-10, and IET-11) were conducted in CTRF, which is a 1/6{sup th} scale model of the Surry reactor containment building (RCB). The 1/10{sup th} scale IET test (IET-12) was performed in the Surtsey vessel, which had been configured as a 1/10{sup th} scale Surry RCB. Scale models were constructed in each of the facilities of the Surry structures, including the reactor pressure vessel, reactor support skirt, control rod drive missile shield, biological shield wall, cavity, instrument tunnel, residual heat removal platform and heat exchangers, seal table room and seal table, operating deck, and crane wall. This report describes these experiments and gives the results.

Blanchat, T.K.; Allen, M.D.; Pilch, M.M. [Sandia National Labs., Albuquerque, NM (United States); Nichols, R.T. [Ktech Corp., Albuquerque, NM (United States)

1994-06-01T23:59:59.000Z

376

Environmental consequences of postulate plutonium releases from Atomics International's Nuclear Materials Development Facility (NMDF), Santa Susana, California, as a result of severe natural phenomena  

SciTech Connect (OSTI)

Potential environmental consequences in terms of radiation dose to people are presented for postulated plutonium releases caused by severe natural phenomena at the Atomics International's Nuclear Materials Development Facility (NMDF), in the Santa Susana site, California. The severe natural phenomena considered are earthquakes, tornadoes, and high straight-line winds. Plutonium deposition values are given for significant locations around the site. All important potential exposure pathways are examined. The most likely 50-year committed dose equivalents are given for the maximum-exposed individual and the population within a 50-mile radius of the plant. The maximum plutonium deposition values likely to occur offsite are also given. The most likely calculated 50-year collective committed dose equivalents are all much lower than the collective dose equivalent expected from 50 years of exposure to natural background radiation and medical x-rays. The most likely maximum residual plutonium contamination estimated to be deposited offsite following the earthquake, and the 150-mph and 170-mph tornadoes are above the Environmental Protection Agency's (EPA) proposed guideline for plutonium in the general environment of 0.2 ..mu..Ci/m/sup 2/. The deposition values following the 110-mph and the 130-mph tornadoes are below the EPA proposed guideline.

Jamison, J.D.; Watson, E.C.

1982-02-01T23:59:59.000Z

377

The International Criticality Safety Benchmark Evaluation Project  

SciTech Connect (OSTI)

The International Criticality Safety Benchmark Evaluation Project (ICSBEP) was initiated in 1992 by the U.S. Department of Energy. The ICSBEP became an official activity of the Organisation for Economic Co-operation and Development (OECD) Nuclear Energy Agency in 1995. Representatives from the United States, United Kingdom, France, Japan, the Russian Federation, Hungary, Republic of Korea, Slovenia, Yugoslavia, Kazakhstan, Spain, and Israel are now participating. The purpose of the ICSBEP is to identify, evaluate, verify, and formally document a comprehensive and internationally peer-reviewed set of criticality safety benchmark data. The work of the ICSBEP is published as an OECD handbook entitled "International Handbook of Evaluated Criticality Safety Benchmark Experiments" (ICSBEP Handbook). The 2002 edition of the ICSBEP Handbook contains benchmark model specifications for 2881 critical or subcritical configurations that are intended for validating computer codes that calculate effective neutron multiplication and for testing basic nuclear data.

J. Blair Briggs

2003-09-01T23:59:59.000Z

378

Critical Infrastructure Interdependency Modeling: A Survey of U.S. and International Research  

SciTech Connect (OSTI)

The Nations health, wealth, and security rely on the production and distribution of certain goods and services. The array of physical assets, processes, and organizations across which these goods and services move are called "critical infrastructures".1 This statement is as true in the U.S. as in any country in the world. Recent world events such as the 9-11 terrorist attacks, London bombings, and gulf coast hurricanes have highlighted the importance of stable electric, gas and oil, water, transportation, banking and finance, and control and communication infrastructure systems. Be it through direct connectivity, policies and procedures, or geospatial proximity, most critical infrastructure systems interact. These interactions often create complex relationships, dependencies, and interdependencies that cross infrastructure boundaries. The modeling and analysis of interdependencies between critical infrastructure elements is a relatively new and very important field of study. The U.S. Technical Support Working Group (TSWG) has sponsored this survey to identify and describe this current area of research including the current activities in this field being conducted both in the U.S. and internationally. The main objective of this study is to develop a single source reference of critical infrastructure interdependency modeling tools (CIIMT) that could be applied to allow users to objectively assess the capabilities of CIIMT. This information will provide guidance for directing research and development to address the gaps in development. The results will inform researchers of the TSWG Infrastructure Protection Subgroup of research and development efforts and allow a more focused approach to addressing the needs of CIIMT end-user needs. This report first presents the field of infrastructure interdependency analysis, describes the survey methodology, and presents the leading research efforts in both a cumulative table and through individual datasheets. Data was collected from open source material and when possible through direct contact with the individuals leading the research.

Not Available

2006-08-01T23:59:59.000Z

379

Modeling of UF{sub 6} enrichment with gas centrifuges for nuclear safeguards activities  

SciTech Connect (OSTI)

The physical modeling of uranium isotopes ({sup 235}U, {sup 238}U) separation process by centrifugation of is a key aspect for predicting the nuclear fuel enrichment plant performances under surveillance by the Nuclear Safeguards Authorities. In this paper are illustrated some aspects of the modeling of fast centrifuges for UF{sub 6} gas enrichment and of a typical cascade enrichment plant with the Theoretical Centrifuge and Cascade Simulator (TCCS). The background theory for reproducing the flow field characteristics of a centrifuge is derived from the work of Cohen where the separation parameters are calculated using the solution of a differential enrichment equation. In our case we chose to solve the hydrodynamic equations for the motion of a compressible fluid in a centrifugal field using the Berman - Olander vertical velocity radial distribution and the solution was obtained using the Matlab software tool. The importance of a correct estimation of the centrifuge separation parameters at different flow regimes, lies in the possibility to estimate in a reliable way the U enrichment plant performances, once the separation external parameters are set (feed flow rate and feed, product and tails assays). Using the separation parameters of a single centrifuge allow to determine the performances of an entire cascade and, for this purpose; the software Simulink was used. The outputs of the calculation are the concentrations (assays) and the flow rates of the enriched (product) and depleted (tails) gas mixture. These models represent a valid additional tool, in order to verify the compliance of the U enrichment plant operator declarations with the 'on site' inspectors' measurements.

Mercurio, G.; Peerani, P.; Richir, P.; Janssens, W.; Eklund, G. [European Commission, Joint Research Centre, Institute for Transuranium Elements Via Fermi, 2749-TP181,20127 Ispra (Italy)

2012-09-26T23:59:59.000Z

380

Modeling internal tides and mixing over ocean ridges Donald N. Slinn1  

E-Print Network [OSTI]

the energy pathway from barotropic tide to internal tide to enhanced diapycnal mixing in the HOME project (1978) suggested that the kinetic energy of the tides might provide a significant source of energy source of energy for boundary mixing. Interestingly, the ray of the internal tide is nearly critical

Slinn, Donald

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Asymmetric nuclear matter and neutron-skin in extended relativistic mean field model  

E-Print Network [OSTI]

The density dependence of the symmetry energy, instrumental in understanding the behaviour of the asymmetric nuclear matter, is investigated within the extended relativistic mean field (ERMF) model which includes the contributions from the self and mixed interaction terms for the scalar-isoscalar ($\\sigma$), vector-isoscalar ($\\omega$) and vector-isovector ($\\rho$) mesons upto the quartic order. Each of the 26 different parameterizations of the ERMF model employed are compatible with the bulk properties of the finite nuclei. The behaviour of the symmetry energy for several parameter sets are found to be consistent with the empirical constraints on them as extracted from the analyses of the isospin diffusion data. The neutron-skin thickness in the $^{208}$Pb nucleus for these parameter sets of the ERMF model lie in the range of $\\sim 0.20 - 0.24$ fm which is in harmony with the ones predicted by the Skyrme Hartree-Fock model. We also investigate the role of various mixed interaction terms which are crucial for the density dependence of the symmetry energy.

B. K. Agrawal

2010-03-17T23:59:59.000Z

382

Model evaluation of geochemically induced swelling/shrinkage in argillaceous formations for nuclear waste disposal  

Science Journals Connector (OSTI)

Abstract Argillaceous formations are being considered as host rocks for geologic disposal of nuclear waste in a number of countries. One advantage of emplacing nuclear waste in such formations is the potential self-sealing capability of clay due to swelling, which is of particular importance for the sealing and healing of disturbed rock zones (DRZ). It is therefore necessary to understand and be able to predict the changes in swelling properties within clay rock near the waste-emplacement tunnel. In this paper, considering that the clay rock formation is mostly under saturated conditions and the swelling property changes are mostly due to geochemical changes, we propose a modeling method that links a THC simulator with a swelling module that is based on diffuse double layer theory. Simulations were conducted to evaluate the geochemically induced changes in the swelling properties of the clay rock. Our findings are as follows: (1) geochemically induced swelling/shrinkage occurs exclusively in the EBSclay formation interface, within a few meters from the waste-emplacement tunnels; (2) swelling/shrinkage-induced porosity changes are generally much smaller than those caused by mineral precipitation/dissolution processes; (3) geochemically induced swelling/shrinkage of the host clay rock is affected by variations in the pore water chemistry, exchangeable cations, and smectite abundance. Neglecting any of these three factors might lead to a miscalculation of the geochemically induced swelling pressure.

Liange Zheng; Jonny Rutqvist; Hui-Hai Liu; Jens T. Birkholzer; Eric Sonnenthal

2014-01-01T23:59:59.000Z

383

Exposure conditions of reactor internals of Rovno VVER-440 NPP units 1 and 2  

SciTech Connect (OSTI)

Results of determination of irradiation conditions for vessel internals of VVER-440 reactor No. 1 and 2 at Rovno Nuclear Power Plant, obtained by specialists at Inst. for Nuclear Research Kyiv (Ukraine)), and Nuclear Research Inst. Rez (Czech Republic)), are presented. To calculate neutron transport, detailed calculation models of these reactors were prepared. Distribution of neutron flux functionals on the surface of reactor VVER-440 baffle and core barrel for different core loads was studied. Agreement between results obtained by specialists at Inst. for Nuclear Research and at Nuclear Research Inst. is shown. (authors)

Grytsenko, O.V.; Pugach, S.M.; Diemokhin, V.L.; Bukanov, V.N. [Inst. for Nuclear Research, Kyiv, 03680 (Ukraine); Marek, M.; Vandlik, S. [Nuclear Research Inst. Rez Plc., Rez, 25068 (Czech Republic)

2011-07-01T23:59:59.000Z

384

Kaluza-Klein multidimensional models with Ricci-flat internal spaces: the absence of the KK particles  

E-Print Network [OSTI]

In this paper we consider a multidimensional Kaluza-Klein (KK) model with a Ricci-flat internal space, e.g., a Calabi-Yau manifold. We perturb this background metrics by a system of gravitating masses, e.g., astrophysical objects such as our Sun. We suppose that these masses are pressureless in the external space but they have relativistic pressure in the internal space. We show that metric perturbations do not depend on coordinates of the internal space and gravitating masses should be uniformly smeared over the internal space. This means, first, that KK modes corresponding to the metric fluctuations are absent and, second, particles should be only in the ground quantum state with respect to the internal space. In our opinion, these results look very unnatural. According to statistical physics, any nonzero temperature should result in fluctuations, i.e. in KK modes. We also get formulae for the metric correction terms which enable to calculate the gravitational tests: the deflection of light, the time-delay ...

Chopovsky, Alexey; Zhuk, Alexander

2013-01-01T23:59:59.000Z

385

Radiation Damage in Nuclear Fuel for Advanced Burner Reactors: Modeling and Experimental Validation  

SciTech Connect (OSTI)

The consortium has completed its existence and we are here highlighting work and accomplishments. As outlined in the proposal, the objective of the work was to advance the theoretical understanding of advanced nuclear fuel materials (oxides) toward a comprehensive modeling strategy that incorporates the different relevant scales involved in radiation damage in oxide fuels. Approaching this we set out to investigate and develop a set of directions: 1) Fission fragment and ion trajectory studies through advanced molecular dynamics methods that allow for statistical multi-scale simulations. This work also includes an investigation of appropriate interatomic force fields useful for the energetic multi-scale phenomena of high energy collisions; 2) Studies of defect and gas bubble formation through electronic structure and Monte Carlo simulations; and 3) an experimental component for the characterization of materials such that comparisons can be obtained between theory and experiment.

Niels Gronbech Jensen; Mark Asta; Nigel Browning'Vidvuds Ozolins; Axel van de Walle; Christopher Wolverton

2011-12-29T23:59:59.000Z

386

Deep sub-threshold $?$ and $?$ production in nuclear collisions with the UrQMD transport model  

E-Print Network [OSTI]

We present results on deep sub threshold hyperon production in nuclear collisions, with the UrQMD transport model. Introducing anti-kaon+baryon and hyperon+hyperon strangeness exchange reactions we obtain a good description of experimental data on single strange hadron production in Ar+KCl reactions at $E_{lab}=1.76$ A GeV. We find that the hyperon strangeness exchange is the dominant process contributing to the $\\Xi^-$ yield, however remains short of explaining the $\\Xi^-/\\Lambda$ ratio measured with the HADES experiment. We also discuss possible reasons for the discrepancy with previous studies and the experimental results, finding that many details of the transport simulation may have significant effects on the final $\\Xi^-$ yield.

G. Graef; J. Steinheimer; Feng Li; Marcus Bleicher

2014-09-28T23:59:59.000Z

387

Abstract LB-521: Expression profile of nuclear receptor superfamily in a lung cancer pathogenesis model  

Science Journals Connector (OSTI)

...Abstract 2296: Identification of novel nuclear receptor targets in estrogen receptor...subtype. Aims and Methods: To identify nuclear receptor (NR) targets, we did microarray...using previously published breast cancer datasets. Results and Conclusion: The 41 NRs...

Yangsik Jeong; Jihye Kim; Mitsuo Sato; Woochang Lee; Woochang Lee; Jonathan M. Kurie; John D. Minna; and David J. Mangelsdorf

2012-04-15T23:59:59.000Z

388

Nuclear interactions in a heterokaryon: insight from the model Neurospora tetrasperma  

Science Journals Connector (OSTI)

...reserved. July 7, 2014 research-article Research articles 1001 70 197 200 Nuclear interactions in a heterokaryon...29 Dodge, BO . 1927 Nuclear phenomena associated with...Perkins. 1994 Diverse programs of ascus development in...

2014-01-01T23:59:59.000Z

389

Radioxenon detections in the CTBT International Monitoring System likely related to the announced nuclear test in North Korea conducted on February 12, 2013  

SciTech Connect (OSTI)

Abstract: Observations of the radioxenon isotopes 133Xe and 131mXe collected at the IMS stations RN38 and RN58 on April 7-8, and April 12-13 2013, respectively, are unique with respect to the measurement history of these stations. Comparison of measured data with calculated isotopic ratios as well as analysis using atmospheric transport modeling indicate that it is likely that the xenon measured was created in the underground nuclear test conducted by North Korea on February 12, 2013, and released 7 weeks later. More than one release is required to explain all observations. The 131mXe source terms for each release were calculated to 7x1011 Bq, corresponding to about 1-10% of the total xenon inventory for a 10-kt explosion, depending on fractionation and release scenario. The observed ratios could not be used to obtain any information regarding the fissile material that was used in the test.

Ringbom, Anders; Axelssson, A.; Aldener, M.; Auer, M.; Bowyer, Ted W.; Fritioff, T.; Hoffman, Ian; Khrustalev, Kirill; Nikkinen, Mika; Popov, Vladimir Y.; Popov, Y.; Ungar, R. Kurt; Wotawa, G.

2014-02-01T23:59:59.000Z

390

Comparative study of Dutch and German emergency-management models for near border nuclear accidents  

Science Journals Connector (OSTI)

......Dutch-German commission for nuclear facilities in the border region...radiological situation following a nuclear accident in the border region...compared or validated using datasets of experimental field campaigns...institutes are engaged in the nuclear-emergency response organisations......

Y. S. Kok; H. Eleveld; H. Schnadt; F. Gering; J. Gregor; H. Bttger; C. Salfeld; C. J. W. Twenhfel; H. A. J. M. Reinen

2005-05-01T23:59:59.000Z

391

Nuclear Collective Rotation in the SU3 Model. II: Quantal Rotation for a Triaxial Configuration  

Science Journals Connector (OSTI)

......The collective rotation of a nuclear system with the S U 3 Hamiltonian...described by the quantal dynamical nuclear field theory. An angular frequency...compared with the exact S U 3 energy and the rotor's angular momentum...4 (1990) pp. 766-778 Nuclear Collective Rotation in the......

Shin-ichi Kinouchi; Tetsuo Kammuri; Teruo Kishimoto

1990-02-01T23:59:59.000Z

392

Nuclear Collective Rotation in the SU3 Model. III: Quantal Rotation for an Axially Symmetric Configuration  

Science Journals Connector (OSTI)

......Quantal form of the dynamical nuclear field theory is used for the...the collective rotation of a nuclear system with the S U 3 Hamiltonian...coincides with the exact S U 3 energy; the E2-matrix elements...Bohr A. , Mottelson B. R. Nuclear Structure (1975) New York......

Shin-ichi Kinouchi; Tetsuo Kammuri; Teruo Kishimoto

1990-04-01T23:59:59.000Z

393

PHYSICAL REVIEW C 87, 064608 (2013) Nuclear meson transparency in a relativistic Glauber model  

E-Print Network [OSTI]

interactions (FSI) between the tagged hadron and the nuclear environment vanish. The SSC can also be produced be of the order of the nuclear radius (lf RA). Observation of the onset of CT at a certain energy scale can teach traditional nuclear-physics calculations. The measurement of the onset and magnitude of the CT effect allows

Gent, Universiteit

394

Nuclear interactions in a heterokaryon: insight from the model Neurospora tetrasperma  

Science Journals Connector (OSTI)

...research-article Research articles 1001 70 197 200 Nuclear interactions in a heterokaryon: insight...heterokaryons to demonstrate that the nuclear ratio is consistently biased for mat A-nuclei...we investigated the association between nuclear ratio and expression of alleles of mat-linked...

2014-01-01T23:59:59.000Z

395

Nuclear Physics B (Proc. Suppl.) 77 (1999) 64--72 Standard Solar Models  

E-Print Network [OSTI]

reactions. Thirty­nine experts in low energy nuclear ex­ periments and theory, representing many di#er­ ent In this section, I will first summarize the new and relevant results on nuclear fusion reactions and on the screening of nuclear reactions and then summarize the situation with respect to neu­ trino cross sections

Bahcall, John

396

Modeling nuclear fusion in dense plasmas using a cryogenic non-neutral plasmaa...  

E-Print Network [OSTI]

the nuclear reaction rate in a dense neutral plasma and the energy equipartition rate in a strongly magnetized and at low temperatures, cyclotron energy, like nuclear energy, is released only through rare close as for nuclear reactions. Rate enhancements of up to 1010 are measured in simulations of equipartition

California at San Diego, University of

397

Modeling the lubrication of the piston ring pack in internal combustion engines using the deterministic method  

E-Print Network [OSTI]

Piston ring packs are used in internal combustion engines to seal both the high pressure gas in the combustion chamber and the lubricant oil in the crank case. The interaction between the piston ring pack and the cylinder ...

Chen, Haijie

2011-01-01T23:59:59.000Z

398

Developing a model for explaining and forecasting international tourist arrivals from the major markets to Malaysia  

E-Print Network [OSTI]

International tourism is a multibillion dollar industry today. The East Asia and Pacific Region registered a growth rate nearly three times the world average in the last decade. With such growth and increased competition, it is important...

Chin, Loi Young

2012-06-07T23:59:59.000Z

399

Numerical modeling of piston secondary motion and skirt lubrication in internal combustion engines  

E-Print Network [OSTI]

Internal combustion engines dominate transportation of people and goods, contributing significantly to air pollution, and requiring large amounts of fossil fuels. With increasing public concern about the environment and ...

McClure, Fiona

2007-01-01T23:59:59.000Z

400

Modeling the structural behavior of the piston rings under different boundary conditions in internal combustion engines  

E-Print Network [OSTI]

In the process of designing internal combustion engine, piston ring plays an important role in fulfilling the requirements of camber gas sealing, friction reduction and lubrication oil consumption. The goal of this thesis ...

Xu, Dian

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

Computations and modeling of oil transport between piston lands and liner in internal combustion engines  

E-Print Network [OSTI]

The consumption of lubricating oil in internal combustion engines is a continuous interest for engine developers and remains to be one of the least understood areas. A better understanding on oil transport is critical to ...

Fang, Tianshi

2014-01-01T23:59:59.000Z

402

The Office of Nuclear Verification | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Nuclear Verification | National Nuclear Security Nuclear Verification | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The Office of Nuclear Verification Home > About Us > Our Programs > Nonproliferation > Nonproliferation & International Security > The Office of Nuclear Verification The Office of Nuclear Verification

403

Workshop on Hydrologic Modeling with SWAT and Groundwater Modeling with MODFLOW (26-27 December 2014) International Conference on Modeling Tools for Sustainable Water Resources Management (28-29 December 2014)  

E-Print Network [OSTI]

2014) International Conference on Modeling Tools for Sustainable Water Resources Management (28 for hydrologic data analysis, pre / post processing, and hydrologic modeling Water Resources Management Water application of SWAT model for water manage- ment Prof. Upmanu Lall Columbia University, USA Prof. A.K. Gosain

404

Calcul du SCR Planchet -Guibert -Juillard -1 -UN CADRE DE REFERENCE POUR UN MODELE INTERNE PARTIEL EN ASSURANCE  

E-Print Network [OSTI]

Calcul du SCR Planchet - Guibert - Juillard - 1 - UN CADRE DE REFERENCE POUR UN MODELE INTERNE référence (best estimate, marge pour risque et SCR) dans le cadre d'une approche mêlant calculs analytiques auteur, publié dans "Bulletin Français d'Actuariat 10, 20 (2010) pp. 5-34" #12;Calcul du SCR Planchet

Paris-Sud XI, Université de

405

ANS 2006 WINTER MEETING & Nuclear Technology Expo  

E-Print Network [OSTI]

ANS 2006 WINTER MEETING & Nuclear Technology Expo "Ensuringthe (TOFE) 5th International Topical Meeting on Nuclear Plant Instrumentation, Controls, and Human Machine for their support of the 2006 ANS Winter Meeting & Nuclear Technology Expo; Embedded Topical Meeting: TOFE 2006

Krings, Axel W.

406

Large scale kinematics and dynamical modelling of the Milky Way nuclear star cluster  

E-Print Network [OSTI]

Within the central 10pc of our Galaxy lies a dense nuclear star cluster (NSC), and similar NSCs are found in most nearby galaxies. Studying the structure and kinematics of NSCs reveals the history of mass accretion of galaxy nuclei. Because the Milky Way (MW) NSC is at a distance of only 8kpc, we can spatially resolve the MWNSC on sub-pc scales. This makes the MWNSC a reference object for understanding the formation of all NSCs. We have used the NIR long-slit spectrograph ISAAC (VLT) in a drift-scan to construct an integral-field spectroscopic map of the central 9.5 x 8pc of our Galaxy. We use this data set to extract stellar kinematics both of individual stars and from the unresolved integrated light spectrum. We present a velocity and dispersion map from the integrated light and model these kinematics using kinemetry and axisymmetric Jeans models. We also measure CO bandhead strengths of 1,381 spectra from individual stars. We find kinematic complexity in the NSCs radial velocity map including a misalignmen...

Feldmeier, A; Seth, A; Schdel, R; Ltzgendorf, N; de Zeeuw, P T; Kissler-Patig, M; Nishiyama, S; Walcher, C J

2014-01-01T23:59:59.000Z

407

Nuclear matrix elements for 0??{sup ?}?{sup ?} decays: Comparative analysis of the QRPA, shell model and IBM predictions  

SciTech Connect (OSTI)

In this work we report on general properties of the nuclear matrix elements involved in the neutrinoless double ?{sup ?} decays (0??{sup ?}?{sup ?} decays) of several nuclei. A summary of the values of the NMEs calculated along the years by the Jyvskyl-La Plata collaboration is presented. These NMEs, calculated in the framework of the quasiparticle random phase approximation (QRPA), are compared with those of the other available calculations, like the Shell Model (ISM) and the interacting boson model (IBA-2)

Civitarese, Osvaldo [Department of Physics, University of La Plata, c.c. 67 1900, La Plata Argentina (Argentina); Suhonen, Jouni [Department of Physics, University of Jyvskyl, PO Box 35, FIN-40014 (Finland)

2013-12-30T23:59:59.000Z

408

A revised model of the kidney for medical internal radiation dose calculations  

E-Print Network [OSTI]

are frequently the organs receiving the highest level of radioactivity and, therefore, the largest radiation dose. Short lived radiopharmaceuticals, that are now injected in millicurie quantities in nuclear medicine for rapid-sequence imaging of the brain... radionuclides (Appendix B). 17 These include the following radionuclides presently used in nuclear medicine: P-32, Cr-51, Co-57, Ga-67, Tc-99m, In-ill, I-123, Xe-127, I-131, Xe-133, and T1-201. If the radionuclide emits penetrating radiation, the code...

Patel, Jyoti Shivabhai

1988-01-01T23:59:59.000Z

409

Nuclear Forces and Nuclear Systems  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Forces and Nuclear Systems Forces and Nuclear Systems Our goal is to achieve a description of nuclear systems ranging in size from the deuteron to nuclear matter and neutron stars using a single parameterization of the nuclear forces. Our work includes both the construction of two- and three-nucleon potentials and the development of many-body techniques for computing nuclear properties with these interactions. Detailed quantitative, computationally intense studies are essential parts of this work. In the last decade we have constructed several realistic two- and three-nucleon potential models. The NN potential, Argonne v18, has a dominant charge-independent piece plus additional charge-dependent and charge-symmetry-breaking terms, including a complete electromagnetic interaction. It fits 4301 pp and np elastic scattering data with a chi**2

410

Jordan Boyd-Graber and David M. Blei. PUTOP: Turning Predominant Senses into a Topic Model for WSD. 4th International Workshop on Semantic Evaluations, 2007.  

E-Print Network [OSTI]

Jordan Boyd-Graber and David M. Blei. PUTOP: Turning Predominant Senses into a Topic Model for WSD. 4th International Workshop on Semantic Evaluations, 2007. @inproceedings{Boyd-Graber:Blei-2007, Author = {Jordan Boyd-Graber and David M. Blei}, Booktitle = {4th International Workshop on Semantic

Boyd-Graber, Jordan

411

A Comparison of International Regulatory Organizations and  

E-Print Network [OSTI]

A Comparison of International Regulatory Organizations and Licensing Procedures for New Nuclear the safety regulation and the licensing of new nuclear power plants. The paper considers both design safety approval and issues of site licensing. Advice from international organisations is summarised. Nuclear power

Aickelin, Uwe

412

Nuclear Energy  

Science Journals Connector (OSTI)

Nuclear Energy ... A brief summary of the history and key concepts of nuclear energy. ... Nuclear / Radiochemistry ...

Charles D. Mickey

1980-01-01T23:59:59.000Z

413

Nuclear batteries  

Science Journals Connector (OSTI)

Nuclear batteries ... Describes the structure, operation, and application of nuclear batteries. ... Nuclear / Radiochemistry ...

Alfred B. Garrett

1956-01-01T23:59:59.000Z

414

Modeling nuclear fusion in dense plasmas using a cryogenic non-neutral plasma  

SciTech Connect (OSTI)

An analogy between the nuclear reaction rate in a dense neutral plasma and the energy equipartition rate in a strongly magnetized non-neutral plasma is discussed. This analogy allows the first detailed measurements of plasma screening enhancements in the strong screening and pycnonuclear regimes. In strong magnetic fields and at low temperatures, cyclotron energy, like nuclear energy, is released only through rare close collisions between charges. The probability of such collisions is enhanced by plasma screening, just as for nuclear reactions. Rate enhancements of up to 10{sup 10} are measured in simulations of equipartition, and are compared to theories of screened nuclear reactions.

Dubin, Daniel H. E. [Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)

2008-05-15T23:59:59.000Z

415

Modeling most likely pathways for smuggling radioactive and special nuclear materials on a worldwide multi-modal transportation network  

SciTech Connect (OSTI)

Nuclear weapons proliferation is an existing and growing worldwide problem. To help with devising strategies and supporting decisions to interdict the transport of nuclear material, we developed the Pathway Analysis, Threat Response and Interdiction Options Tool (PATRIOT) that provides an analytical approach for evaluating the probability that an adversary smuggling radioactive or special nuclear material will be detected during transit. We incorporate a global, multi-modal transportation network, explicit representation of designed and serendipitous detection opportunities, and multiple threat devices, material types, and shielding levels. This paper presents the general structure of PATRIOT, all focuses on the theoretical framework used to model the reliabilities of all network components that are used to predict the most likely pathways to the target.

Saeger, Kevin J [Los Alamos National Laboratory; Cuellar, Leticia [Los Alamos National Laboratory

2010-10-28T23:59:59.000Z

416

Modeling most likely pathways for smuggling radioactive and special nuclear materials on a worldwide multimodal transportation network  

SciTech Connect (OSTI)

Nuclear weapons proliferation is an existing and growing worldwide problem. To help with devising strategies and supporting decisions to interdict the transport of nuclear material, we developed the Pathway Analysis, Threat Response and Interdiction Options Tool (PATRIOT) that provides an analytical approach for evaluating the probability that an adversary smuggling radioactive or special nuclear material will be detected during transit. We incorporate a global, multi-modal transportation network, explicit representation of designed and serendipitous detection opportunities, and multiple threat devices, material types, and shielding levels. This paper presents the general structure of PATRIOT, and focuses on the theoretical framework used to model the reliabilities of all network components that are used to predict the most likely pathways to the target.

Saeger, Kevin J [Los Alamos National Laboratory; Cuellar, Leticia [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

417

International Conference of Modeling, Optimization and Simulation -MOSIM'12 June 6-8, 2012 -Bordeaux -France  

E-Print Network [OSTI]

where they are operated and have less noise pollution than internal combus- tion engine vehicles investment (the cost of an electrical charching terminal is about 10.000 euros) and the re- stricted vehicle. The significant initial investment and the current restricted vehicle autonomy give a high relevancy

Paris-Sud XI, Université de

418

Analys av skillnader mellan internationell och svensk rapportering av intrffade hndelser p krnkraftverk; Analysis of differences between international and Swedish reporting of events at nuclear power plants.  

E-Print Network [OSTI]

?? Report of diploma work conducted at the Swedish Radiation Safety Authority (SSM) as part of the bachelors program in Nuclear Engineering at Uppsala University. (more)

Strandman, Lennart

2012-01-01T23:59:59.000Z

419

Nuclear Quadrupole Moments and Nuclear Shell Structure  

DOE R&D Accomplishments [OSTI]

Describes a simple model, based on nuclear shell considerations, which leads to the proper behavior of known nuclear quadrupole moments, although predictions of the magnitudes of some quadrupole moments are seriously in error.

Townes, C. H.; Foley, H. M.; Low, W.

1950-06-23T23:59:59.000Z

420

TYBO/BENHAM: Model Analysis of Groundwater Flow and Radionuclide Migration from Underground Nuclear Tests in Southwestern Pahute Mesa, Nevada  

SciTech Connect (OSTI)

Recent field studies have led to the discovery of trace quantities of plutonium originating from the BENHAM underground nuclear test in two groundwater observation wells on Pahute Mesa at the Nevada Test Site. These observation wells are located 1.3 km from the BENHAM underground nuclear test and approximately 300 m from the TYBO underground nuclear test. In addition to plutonium, several other conservative (e.g. tritium) and reactive (e.g. cesium) radionuclides were found in both observation wells. The highest radionuclide concentrations were found in a well sampling a welded tuff aquifer more than 500m above the BENHAM emplacement depth. These measurements have prompted additional investigations to ascertain the mechanisms, processes, and conditions affecting subsurface radionuclide transport in Pahute Mesa groundwater. This report describes an integrated modeling approach used to simulate groundwater flow, radionuclide source release, and radionuclide transport near the BENHAM and TYBO underground nuclear tests on Pahute Mesa. The components of the model include a flow model at a scale large enough to encompass many wells for calibration, a source-term model capable of predicting radionuclide releases to aquifers following complex processes associated with nonisothermal flow and glass dissolution, and site-scale transport models that consider migration of solutes and colloids in fractured volcanic rock. Although multiple modeling components contribute to the methodology presented in this report, they are coupled and yield results consistent with laboratory and field observations. Additionally, sensitivity analyses are conducted to provide insight into the relative importance of uncertainty ranges in the transport parameters.

Andrew Wolfsberg; Lee Glascoe; Guoping Lu; Alyssa; Olson; Peter Lichtner; Maureen McGraw; Terry Cherry; ,; Guy Roemer

2002-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Convective heat transfer enhancement of laminar flow of latent functionally thermal fluid in a circular tube with constant heat flux: internal heat source model and its application  

Science Journals Connector (OSTI)

This paper analyzes the convective heat transfer enhancement mechanism of latent heat functionally thermal fluid. By using the proposed internal heat source model, the influence of each factor affecting the heat

Yinping Zhang; Xianxu Hu; Qing Hao; Xin Wang

2003-04-01T23:59:59.000Z

422

Motivation, description, and summary status of geomechanical and geochemical modeling studies in Task D of the International DECOVALEX-THMC Project  

E-Print Network [OSTI]

Scale Heater Test at Yucca Mountain. International JournalA is a simplified model of the Yucca Mountain site, a deepDrift Scale Test at Yucca Mountain ( a setting similar to

Birkholzer, J.T.; Barr, D.; Rutqvist, J.; Sonnenthal, E.

2005-01-01T23:59:59.000Z

423

Water resources: sustainable water supply management and basin wide modelling Internationally it has been recognized that the most important challenge to ensuring sustainable  

E-Print Network [OSTI]

Water resources: sustainable water supply management and basin wide modelling Internationally it has been recognized that the most important challenge to ensuring sustainable water use is implementing integrated water resources management (IWRM). It provides the best framework for balancing

Barthelat, Francois

424

Current Understanding and Remaining Challenges in Modeling Long-Term Degradation of Borosilicate Nuclear Waste Glasses  

SciTech Connect (OSTI)

Chemical durability is not a single material property that can be uniquely measured. Instead it is the response to a host of coupled material and environmental processes whose rates are estimated by a combination of theory, experiment, and modeling. High-level nuclear waste (HLW) glass is perhaps the most studied of any material yet there remain significant technical gaps regarding their chemical durability. The phenomena affecting the long-term performance of HLW glasses in their disposal environment include surface reactions, transport properties to and from the reacting glass surface, and ion exchange between the solid glass and the surrounding solution and alteration products. The rates of these processes are strongly influenced and are coupled through the solution chemistry, which is in turn influenced by the reacting glass and also by reaction with the near-field materials and precipitation of alteration products. Therefore, those processes must be understood sufficiently well to estimate or bound the performance of HLW glass in its disposal environment over geologic time-scales. This article summarizes the current state of understanding of surface reactions, transport properties, and ion exchange along with the near-field materials and alteration products influences on solution chemistry and glass reaction rates. Also summarized are the remaining technical gaps along with recommended approaches to fill those technical gaps.

Vienna, John D. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Ryan, Joseph V. [Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Gin, Stephane [CEA Marcoule, DTCD SECM, Bagnols-sur-Ceze (France); Inagaki, Yaohiro [Dept. of Applied Quantum Physics and Nuclear Engineering, Kyushu University, Fukuoda (Japan)

2013-12-05T23:59:59.000Z

425

Nuclear Induction  

Science Journals Connector (OSTI)

The magnetic moments of nuclei in normal matter will result in a nuclear paramagnetic polarization upon establishment of equilibrium in a constant magnetic field. It is shown that a radiofrequency field at right angles to the constant field causes a forced precession of the total polarization around the constant field with decreasing latitude as the Larmor frequency approaches adiabatically the frequency of the r-f field. Thus there results a component of the nuclear polarization at right angles to both the constant and the r-f field and it is shown that under normal laboratory conditions this component can induce observable voltages. In Section 3 we discuss this nuclear induction, considering the effect of external fields only, while in Section 4 those modifications are described which originate from internal fields and finite relaxation times.

F. Bloch

1946-10-01T23:59:59.000Z

426

Nuclear Forensics  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

nuclear forensics Nuclear Forensics AMS is a Powerful Tool for Nuclear Forensics Nuclear forensics, which can be applied to both interdicted materials and debris from a nuclear...

427

The U.S. national nuclear forensics library, nuclear materials information program, and data dictionary  

SciTech Connect (OSTI)

Nuclear forensics assessments to determine material process history requires careful comparison of sample data to both measured and modeled nuclear material characteristics. Developing centralized databases, or nuclear forensics libraries, to house this information is an important step to ensure all relevant data will be available for comparison during a nuclear forensics analysis and help expedite the assessment of material history. The approach most widely accepted by the international community at this time is the implementation of National Nuclear Forensics libraries, which would be developed and maintained by individual nations. This is an attractive alternative toan international database since it provides an understanding that each country has data on materials produced and stored within their borders, but eliminates the need to reveal any proprietary or sensitive information to other nations. To support the concept of National Nuclear Forensics libraries, the United States Department of Energy has developed a model library, based on a data dictionary, or set of parameters designed to capture all nuclear forensic relevant information about a nuclear material. Specifically, information includes material identification, collection background and current location, analytical laboratories where measurements were made, material packaging and container descriptions, physical characteristics including mass and dimensions, chemical and isotopic characteristics, particle morphology or metallurgical properties, process history including facilities, and measurement quality assurance information. While not necessarily required, it may also be valuable to store modeled data sets including reactor burn-up or enrichment cascade data for comparison. It is fully expected that only a subset of this information is available or relevant to many materials, and much of the data populating a National Nuclear Forensics library would be process analytical or material accountability measurement data as opposed to a complete forensic analysis of each material in the library.

Lamont, Stephen Philip [Los Alamos National Laboratory; Brisson, Marcia [DOE-IN; Curry, Michael [DEPT. OF STATE

2011-02-17T23:59:59.000Z

428

Natural System Evaluation and Tool Development: International Collaborations FY13 Progress Report  

Broader source: Energy.gov [DOE]

Active participation in international R&D is crucial for achieving the Used Nuclear Fuel Disposition long-term goals of conducting experiments to fill data needs and confirm advanced modeling approaches and of having a robust modeling and experimental basis for evaluation of multiple disposal system options.

429

Uncertainties in nuclear transition matrix elements for neutrinoless ?? decay within the projected-Hartree-Fock-Bogoliubov model  

Science Journals Connector (OSTI)

The nuclear transition matrix elements M(0?) for the neutrinoless ?? decay of Zr94,96, Mo98,100, Ru104, Pd110, Te128,130, and Nd150 isotopes in the case of 0+?0+ transition are calculated using the projected-Hartree-Fock-Bogoliubov wave functions, which are eigenvectors of four different parametrizations of a Hamiltonian with pairing plus multipolar effective two-body interaction. Employing two (three) different parametrizations of Jastrow-type short-range correlations, a set of eight (twelve) different nuclear transition matrix elements M(0?) is built for each decay, whose averages in conjunction with their standard deviations provide an estimate of the models uncertainties.

P. K. Rath, R. Chandra, K. Chaturvedi, P. K. Raina, and J. G. Hirsch

2010-12-17T23:59:59.000Z

430

Status and Effectiveness of DOE Efforts to Learn from Internal and External Operating Experience in Accordance with Commitment #20 of the DOE Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2004-1  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Safety and Security Safety and Security Report to the Secretary on the Status and Effectiveness of DOE Efforts to Learn from Internal and External Operating Experience in Accordance with Commitment #20 of the DOE Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2004-1 February 2011 Office of Health, Safety and Security U.S. Department of Energy Office of Health, Safety and Security HSS Table of Contents 1.0 Introduction ......................................................................................................................... 1 2.0 Department-wide Action Plan for the Columbia Accident and Davis-Besse Event ........... 3 3.0 Comprehensive Operating Experience Program ................................................................. 5

431

Status and Effectiveness of DOE Efforts to Learn from Internal and External Operating Experience in Accordance with Commitment #20 of the DOE Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2004-1  

Broader source: Energy.gov (indexed) [DOE]

Safety and Security Safety and Security Report to the Secretary on the Status and Effectiveness of DOE Efforts to Learn from Internal and External Operating Experience in Accordance with Commitment #20 of the DOE Implementation Plan for Defense Nuclear Facilities Safety Board Recommendation 2004-1 February 2011 Office of Health, Safety and Security U.S. Department of Energy Office of Health, Safety and Security HSS Table of Contents 1.0 Introduction ......................................................................................................................... 1 2.0 Department-wide Action Plan for the Columbia Accident and Davis-Besse Event ........... 3 3.0 Comprehensive Operating Experience Program ................................................................. 5

432

Advanced Modeling and Evaluation of the Response of Base-Isolated Nuclear Facility Structures to Vertical Earthquake Excitation  

E-Print Network [OSTI]

Structures . iii 3 Nuclear Power Plants 3.1 Nuclear FacilityKashiwazaki-Kariwa Nuclear Power Plant 3.3.1 2004 Ch uetsuKashiwazaki-Kariwa nuclear power plant in response to the

Keldrauk, Eric Scott

2012-01-01T23:59:59.000Z

433

Effects of $?$ hyperons on the nuclear equation of state in a Dirac-Brueckner-Hartree-Fock model  

E-Print Network [OSTI]

We predict the energy per baryon in nuclear matter with non-zero fraction of $\\Lambda$ hyperons. We include Dirac effects on the nucleons as well as the $\\Lambda$ and describe how the latter is implemented. We use the nucleon-hyperon meson-exchange potentials from the Juelich group, the latest as well as an earlier version. The dependence of the results on the many-body framework and on the nucleon-hyperon interaction model is discussed.

Francesca Sammarruca

2009-02-05T23:59:59.000Z

434

NNSA Contributions to the IAEA | National Nuclear Security Administrat...  

National Nuclear Security Administration (NNSA)

of Energy's National Nuclear Security Administration (NNSA) provided a one-time infusion of nearly 50 million to the IAEA for the establishment of an international nuclear...

435

Safety Reports Series No. 11, Developing Safety Culture in Nuclear...  

Broader source: Energy.gov (indexed) [DOE]

in Nuclear Activities: Practical Suggestions to Assist Progress, International Atomic Energy Agency Safety Reports Series No. 11, Developing Safety Culture in Nuclear Activities:...

436

Energy/National Nuclear Security Administration (NNSA) Career...  

Energy Savers [EERE]

Graduates EnergyNational Nuclear Security Administration (NNSA) Career Pathways Program EnergyNational Nuclear Security Administration (NNSA) Career Pathways Program Intern...

437

World Net Nuclear Electric Power Generation, 1980-2007 - Datasets...  

Open Energy Info (EERE)

U.S. Energy Information ... World Net Nuclear Electric ... Dataset Activity Stream World Net Nuclear Electric Power Generation, 1980-2007 International data showing world net...

438

Nuclear Material Recovery | Y-12 National Security Complex  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

nuclear material domestically and internationally is one part of Y-12's nuclear nonproliferation business. Miscellaneous scrap material is a diverse group of scrap materials...

439

A Explanatory Model of Public Acceptance for Nuclear Power Technology: From Low-Carbon Perspective  

Science Journals Connector (OSTI)

There are not so many literature about nuclear power technology of public acceptance in China, but different scholars have different opinions about the determinants of public acceptance. Xi and Xue studied that w...

Yuan-hua Yang; Li Li; Guo-hua Niu

2013-01-01T23:59:59.000Z

440

Simulation and Optimization Models for Scheduling Multi-step Sequential Procedures in Nuclear Medicine  

E-Print Network [OSTI]

The rise in demand for specialized medical services in the U.S has been recognized as one of the contributors to increased health care costs. Nuclear medicine is a specialized service that uses relatively new technologies and radiopharmaceuticals...

Perez Roman, Eduardo

2011-08-08T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Time-Dependent Reliability Analysis of Nuclear Reactor Operators Using Probabilistic Network Models  

Science Journals Connector (OSTI)

Human factors are very important for the reliability of a nuclear power plant. Human behavior has essentially time-dependent nature. The details of thinking and decision making processes are important for deta...

Yoshiaki Oka; Kenji Miyata; Hideki Kodaira

1988-01-01T23:59:59.000Z

442

System modeling and reactor design studies of the Advanced Thermionic Initiative space nuclear reactor  

SciTech Connect (OSTI)

In-core thermionic space reactor design concepts that operate at a nominal power output range of 20 to 50 kW(electric) are described. Details of the neutronic, thermionic, thermal hydraulics, and shielding performance are presented. Because of the strong absorption of thermal neutrons by natural tungsten and the large amount of natural tungsten within the reactor core, two designs are considered. An overall system design code has been developed at Oregon State University to model advanced in-core thermionic energy conversion-based nuclear reactor systems for space applications. The results show that the driverless single-cell Advanced Thermionic Initiative (ATI) configuration, which does not have driver fuel rods, proved to be more efficient than the driven core, which has driver rods. The results also show that the inclusion of the true axial and radial power distribution decrease the overall conversion efficiency. The flattening of the radial power distribution by three different methods would lead to a higher efficiency. The results show that only one TFE works at the optimum emitter temperature; all other TFEs are off the optimum performance and result in a 40% decrease of the efficiency of the overall system. The true axial profile is significantly different as there is a considerable amount of neutron leakage out of the top and bottom of the reactor. The analysis reveals that the axial power profile actually has a chopped cosine shape. For this axial profile, the reactor core overall efficiency for the driverless ATI reactor version is found to be 5.84% with a total electrical power of 21.92 kW(electric). By considering the true axial power profile instead of the uniform power profile, each TFE loses {approximately}80 W(electric).

Lee, H.H.; Abdul-Hamid, S.; Klein, A.C. [Oregon State Univ., Corvallis, OR (United States). Dept. of Nuclear Engineering Radiation Center] [Oregon State Univ., Corvallis, OR (United States). Dept. of Nuclear Engineering Radiation Center

1996-07-01T23:59:59.000Z

443

Hydraulic model analysis of water distribution system, Rockwell International, Rocky Flats, Colorado  

SciTech Connect (OSTI)

Rockwell International requested an analysis of the existing plant site water supply distribution system at Rocky Flats, Colorado, to determine its adequacy. On September 26--29, 1988, Hughes Associates, Inc., Fire Protection Engineers, accompanied by Rocky Flats Fire Department engineers and suppression personnel, conducted water flow tests at the Rocky Flats plant site. Thirty-seven flows from various points throughout the plant site were taken on the existing domestic supply/fire main installation to assure comprehensive and thorough representation of the Rocky Flats water distribution system capability. The analysis was completed in four phases which are described, together with a summary of general conclusions and recommendations.

Perstein, J.; Castellano, J.A. [Hughes Associates, Inc., Wheaton, MD (United States)

1989-01-20T23:59:59.000Z

444

Physics in nuclear safeguards  

Science Journals Connector (OSTI)

International agreements demand that rigorous control procedures are applied to nuclear material. Containment and surveillance techniques are used to monitor the security aspects of dealing with the material whilst accountancy provides quantitative information. The author shows that the methods used to control nuclear material can be conveniently broken down into these two parts

B.W. Hooton

1984-01-01T23:59:59.000Z

445

Long-Term Planning for Nuclear Energy Systems Under Deep Uncertainty  

E-Print Network [OSTI]

5.3.2 Nuclear Energy System Model . . . . . . . . . . .Brief History of Nuclear Energy . . . . . . . . Nuclear FuelModeling . . . . . . . . . . . . . 5.3 Nuclear Energy System

Kim, Lance Kyungwoo

2011-01-01T23:59:59.000Z

446

DOE/DHS INDUSTRIAL CONTROL SYSTEM CYBER SECURITY PROGRAMS: A MODEL FOR USE IN NUCLEAR FACILITY SAFEGUARDS AND SECURITY  

SciTech Connect (OSTI)

Many critical infrastructure sectors have been investigating cyber security issues for several years especially with the help of two primary government programs. The U.S. Department of Energy (DOE) National SCADA Test Bed and the U.S. Department of Homeland Security (DHS) Control Systems Security Program have both implemented activities aimed at securing the industrial control systems that operate the North American electric grid along with several other critical infrastructure sectors (ICS). These programs have spent the last seven years working with industry including asset owners, educational institutions, standards and regulating bodies, and control system vendors. The programs common mission is to provide outreach, identification of cyber vulnerabilities to ICS and mitigation strategies to enhance security postures. The success of these programs indicates that a similar approach can be successfully translated into other sectors including nuclear operations, safeguards, and security. The industry regulating bodies have included cyber security requirements and in some cases, have incorporated sets of standards with penalties for non-compliance such as the North American Electric Reliability Corporation Critical Infrastructure Protection standards. These DOE and DHS programs that address security improvements by both suppliers and end users provide an excellent model for nuclear facility personnel concerned with safeguards and security cyber vulnerabilities and countermeasures. It is not a stretch to imagine complete surreptitious collapse of protection against the removal of nuclear material or even initiation of a criticality event as witnessed at Three Mile Island or Chernobyl in a nuclear ICS inadequately protected against the cyber threat.

Robert S. Anderson; Mark Schanfein; Trond Bjornard; Paul Moskowitz

2011-07-01T23:59:59.000Z

447

International Partnership on Mitigation and Measuring, Reporting...  

Open Energy Info (EERE)

Organization German Federal Ministry for the Environment, Nature Conservancy and Nuclear Safety (BMU), German Agency for International Cooperation (GIZ) Sector Climate Focus...

448

Nuclear Physics for Nuclear Fusion  

SciTech Connect (OSTI)

The nuclear fusion data for deuteron-triton resonance near 100 keV are found to be consistent with the selective resonant tunneling model. The feature of this selective resonant tunneling is the selectivity. It selects not only the energy level, but also the damping rate (nuclear reaction rate). When the Coulomb barrier is thin and low, the resonance selects the fast reaction channel; however, when the Coulomb barrier is thick and high, the resonance selects the slow reaction channel. This mechanism might open an approach toward fusion energy with no strong nuclear radiation.

Li Xingzhong [Tsinghua University (China)

2002-01-15T23:59:59.000Z

449

Evaluation of Nuclear Activation of Tungsten Plates for Future Modeling of a Medical Accelerator  

Science Journals Connector (OSTI)

Shielding Materials / Special Issue on the 11th International Conference on Radiation Shielding and the 15th Topical Meeting of the Radiation Protection and Shielding Division (Part 2) / Radiation Measurements and Instrumentation

Bin Han; Bryan Bednarz; Yaron Danon; Robert Block; X. George Xu

450

Nuclear Safeguards and Security Challenge:  

National Nuclear Security Administration (NNSA)

Nuclear Safeguards and Security Nuclear Safeguards and Security Challenge: The international safeguards and security system is being challenged by evolving proliferation and terrorism threats, expanding International Atomic Energy Agency (IAEA) responsibilities, a retiring safeguards workforce, and the need for better technologies to detect and deter proliferation, theft, and sabotage. Response: Revitalize, strengthen, and sustain U.S. and international safeguards and security capabilities through the Next Generation Safeguards Initiative (NGSI) and International Nuclear Security programs that: * Support the development of safeguards and security policies, concepts and approaches * Develop human capital through training and education * Develop and implement new safeguards systems,

451

The Office of Nuclear Safeguards and Security | National Nuclear Security  

National Nuclear Security Administration (NNSA)

Safeguards and Security | National Nuclear Security Safeguards and Security | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog The Office of Nuclear Safeguards and Security Home > About Us > Our Programs > Nonproliferation > Nonproliferation & International Security > The Office of Nuclear Safeguards and Security The Office of Nuclear Safeguards and Security

452

THE INTERNATIONAL GEOLOGICAL CONGRESS  

Science Journals Connector (OSTI)

... , sections, plans, models in relief, c., to be found in the Exposition Universelle, will realise the expectations expressed in the circular of the International Committee, of an ...

T. STERRY HUNT

1878-06-06T23:59:59.000Z

453

Why Model-Based Engineering and Manufacturing Makes Sense for the Plants and Laboratories of the Nuclear Weapon Complex  

SciTech Connect (OSTI)

The purpose of this White Paper is to outline the benefits we expect to receive from Model-Based Engineering and Manufacturing (MBE/M) for the design, analysis, fabrication, and assembly of nuclear weapons for upcoming Life Extension Programs (LEPs). Industry experiences with model-based approaches and the NNSA/DP investments and experiences, discussed in this paper, indicate that model-based methods can achieve reliable refurbished weapons for the stockpile with less cost and time. In this the paper, we list both general and specific benefits of MBE/M for the upcoming LEPs and the metrics for determining the success of model-based approaches. We also present some outstanding issues and challenges to deploying and achieving long-term benefit from the MBE/M. In conclusion, we argue that successful completion of the upcoming LEPs--with very aggressive schedule and funding restrictions--will depend on electronic model-based methods. We ask for a strong commitment from LEP managers throughout the Nuclear Weapons Complex to support deployment and use of MBE/M systems to meet their program needs.

Franklin, K W; Howell, L N; Lewis, D G; Neugebauer, C A; O'Brien, D W; Schilling, S A

2001-05-15T23:59:59.000Z

454

Application of a 2-D particle tracking model to simulate entrainment of winter flounder larvae at the Millstone Nuclear Power Station  

E-Print Network [OSTI]

A 2-D random walk model, developed by Dimou (1989) as part of this research project, was used to simulate entrainment at the Millstone Nuclear Power Station of winter flounder larvae hatched within Niantic River.

Dimou, Nadia K.

1989-01-01T23:59:59.000Z

455

Cognitive decision errors and organization vulnerabilities in nuclear power plant safety management: Modeling using the TOGA meta-theory framework  

SciTech Connect (OSTI)

In the field of nuclear power plant (NPP) safety modeling, the perception of the role of socio-cognitive engineering (SCE) is continuously increasing. Today, the focus is especially on the identification of human and organization decisional errors caused by operators and managers under high-risk conditions, as evident by analyzing reports on nuclear incidents occurred in the past. At present, the engineering and social safety requirements need to enlarge their domain of interest in such a way to include all possible losses generating events that could be the consequences of an abnormal state of a NPP. Socio-cognitive modeling of Integrated Nuclear Safety Management (INSM) using the TOGA meta-theory has been discussed during the ICCAP 2011 Conference. In this paper, more detailed aspects of the cognitive decision-making and its possible human errors and organizational vulnerability are presented. The formal TOGA-based network model for cognitive decision-making enables to indicate and analyze nodes and arcs in which plant operators and managers errors may appear. The TOGA's multi-level IPK (Information, Preferences, Knowledge) model of abstract intelligent agents (AIAs) is applied. In the NPP context, super-safety approach is also discussed, by taking under consideration unexpected events and managing them from a systemic perspective. As the nature of human errors depends on the specific properties of the decision-maker and the decisional context of operation, a classification of decision-making using IPK is suggested. Several types of initial situations of decision-making useful for the diagnosis of NPP operators and managers errors are considered. The developed models can be used as a basis for applications to NPP educational or engineering simulators to be used for training the NPP executive staff. (authors)

Cappelli, M. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy); Gadomski, A. M. [ECONA, Centro Interuniversitario Elaborazione Cognitiva Sistemi Naturali e Artificiali, via dei Marsi 47, Rome (Italy); Sepiellis, M. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy); Wronikowska, M. W. [UTFISST, ENEA Casaccia, via Anguillarese 301, Rome (Italy); Poznan School of Social Sciences (Poland)

2012-07-01T23:59:59.000Z

456

Model Estimates of M2 Internal Tide Generation over Mid-Atlantic Ridge Topography  

Science Journals Connector (OSTI)

The conversion of barotropic to baroclinic M2 tidal energy is examined for a section of the Mid-Atlantic Ridge in the Brazil Basin using a primitive equation model. Model runs are made with different horizontal smoothing (1.5, 6, and 15 km) ...

N. V. Zilberman; J. M. Becker; M. A. Merrifield; G. S. Carter

2009-10-01T23:59:59.000Z

457

A Kinetic Energy Budget and Internal Instabilities in the Fine Resolution Antarctic Model  

Science Journals Connector (OSTI)

An energy analysis of the Fine Resolution Antarctic Model (FRAM) reveals the instability processes in the model. The main source of time-mean kinetic energy is the wind stress and the main sink is transfer to mean potential energy. The wind ...

V. O. Ivchenko; A. M. Treguier; S. E. Best

1997-01-01T23:59:59.000Z

458

International Conference of Modeling, Optimization and Simulation -MOSIM'12 June 06-08, 2012 Bordeaux -France  

E-Print Network [OSTI]

ALGORITHM FOR A LI-ION BATTERY EQUIVALENT ELECTRICAL CIRCUIT IDENTIFICATION R. AL NAZER, V. CATTIN, diverse equivalent electrical circuits have been used to modelize Li-ion battery behaviour. However (EEC) introduces non integer derivatives to accurately modelize the Li-ion battery behaviour. We

Paris-Sud XI, Université de

459

Nuclear Power in France Beyond the Myth  

E-Print Network [OSTI]

and Nuclear Policy Commissioned by the Greens-EFA Group in the European Parliament V5 #12;Note: The present international energy nuclear policy consultant. Between 1983 and April 2003 Mycle Schneider was executiveNuclear Power in France Beyond the Myth By Mycle Schneider International Consultant on Energy

Laughlin, Robert B.

460

Health effects models for nuclear power plant accident consequence analysis. Modification of models resulting from addition of effects of exposure to alpha-emitting radionuclides: Revision 1, Part 2, Scientific bases for health effects models, Addendum 2  

SciTech Connect (OSTI)

The Nuclear Regulatory Commission (NRC) has sponsored several studies to identify and quantify, through the use of models, the potential health effects of accidental releases of radionuclides from nuclear power plants. The Reactor Safety Study provided the basis for most of the earlier estimates related to these health effects. Subsequent efforts by NRC-supported groups resulted in improved health effects models that were published in the report entitled {open_quotes}Health Effects Models for Nuclear Power Plant Consequence Analysis{close_quotes}, NUREG/CR-4214, 1985 and revised further in the 1989 report NUREG/CR-4214, Rev. 1, Part 2. The health effects models presented in the 1989 NUREG/CR-4214 report were developed for exposure to low-linear energy transfer (LET) (beta and gamma) radiation based on the best scientific information available at that time. Since the 1989 report was published, two addenda to that report have been prepared to (1) incorporate other scientific information related to low-LET health effects models and (2) extend the models to consider the possible health consequences of the addition of alpha-emitting radionuclides to the exposure source term. The first addendum report, entitled {open_quotes}Health Effects Models for Nuclear Power Plant Accident Consequence Analysis, Modifications of Models Resulting from Recent Reports on Health Effects of Ionizing Radiation, Low LET Radiation, Part 2: Scientific Bases for Health Effects Models,{close_quotes} was published in 1991 as NUREG/CR-4214, Rev. 1, Part 2, Addendum 1. This second addendum addresses the possibility that some fraction of the accident source term from an operating nuclear power plant comprises alpha-emitting radionuclides. Consideration of chronic high-LET exposure from alpha radiation as well as acute and chronic exposure to low-LET beta and gamma radiations is a reasonable extension of the health effects model.

Abrahamson, S. [Wisconsin Univ., Madison, WI (United States); Bender, M.A. [Brookhaven National Lab., Upton, NY (United States); Boecker, B.B.; Scott, B.R. [Lovelace Biomedical and Environmental Research Inst., Albuquerque, NM (United States). Inhalation Toxicology Research Inst.; Gilbert, E.S. [Pacific Northwest Lab., Richland, WA (United States)

1993-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "international nuclear model" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


461

International Programs | Department of Energy  

Broader source: Energy.gov (indexed) [DOE]

International Programs International Programs International Programs The Office of Environmental Management (EM) International Program seeks out international technical experts to support EM's mission of accelerated risk reduction and cleanup of the environmental legacy of the nation's nuclear weapons program and government-sponsored nuclear energy research. To achieve this, EM pursues collaborations with foreign government organizations, educational institutions, and private industry to identify technologies that can address the site cleanup needs of the U.S. Department of Energy. The EM International Program currently works with the Russian Federation and Ukraine through cooperative bilateral arrangements to support EM's accelerated cleanup and closure mission. The EM International Program is also currently evaluating the potential benefits

462

Use of international data sets to evaluate and validate pathway assessment models applicable to exposure and dose reconstruction at DOE facilities. Progress report, August 1993--January 1994  

SciTech Connect (OSTI)

This project, ``Use of International Data Sets to Evaluate and Validate Pathway Assessment Models Applicable to Exposure and Dose Reconstruction at DOE Facilities,`` grew out of several activities being conducted by the Principal Investigator Dr. F Owen Hoffman. One activity was originally part of the Chernobyl Studies Project and began as Task 7.1D, ``Internal Dose From Direct Contamination of Terrestrial Food Sources.`` The objective of Task 7.1D was to (1) establish a collaborative US USSR effort to improve and validate our methods of forecasting doses and dose commitments from the direct contamination of food sources, and (2) perform experiments and validation studies to improve our ability to predict rapidly and accurately the long-term internal dose from the contamination of agricultural soil. The latter was to include the consideration of remedial measures to block contamination of food grown on contaminated soil. The current objective of this project is to evaluate and validate pathway-assessment models applicable to exposure and dose reconstruction at DOE facilities through use of international data sets. This project incorporates the activity of Task 7.1D into a multinational effort to evaluate data used for the prediction of radionuclide transfer through agricultural and aquatic systems to humans. It also includes participation in two multinational studies, BIOMOVS (BIOspheric MOdel Validation Study) with the Swedish National Institute for Radiation Protection and VAMP (VAlidation of Model Predictions) with the International Atomic Energy Agency, that address testing the performance of models of radionuclide transport through foodchains.

Hendrickson, S.M. [ed.] [Lawrence Livermore National Lab., CA (United States)] [ed.; Lawrence Livermore National Lab., CA (United States); Hoffman, F.O. [Senes Oak Ridge, Inc., TN (United States). Center for Risk Analysis] [Senes Oak Ridge, Inc., TN (United States). Center for Risk Analysis

1994-03-01T23:59:59.000Z

463

Incremental learning of context-dependent dynamic internal models for robot control  

E-Print Network [OSTI]

, energy efficiency) with respect to model-free approaches. However, as robots become more and more complex Tecnologia de Set´ubal, Portugal Fig. 1. The iCub robot holding a 33cl plastic bottle filled with water

Instituto de Sistemas e Robotica

464

Natural Circulation in Water Cooled Nuclear Power Plants Phenomena, models, and methodology for system reliability assessments  

SciTech Connect (OSTI)

In recent years it has been recognized that the application of passive safety systems (i.e., those whose operation takes advantage of natural forces such as convection and gravity), can contribute to simplification and potentially to improved economics of new nuclear power plant designs. In 1991 the IAEA Conference on ''The Safety of Nuclear Power: Strategy for the Future'' noted that for new plants the use of passive safety features is a desirable method of achieving simplification and increasing the reliability of the performance of essential safety functions, and should be used wherever appropriate''.

Jose Reyes

2005-02-14T23:59:59.000Z

465

A viscoplastic model of expanding cylindrical shells subjected to internal explosive detonations  

SciTech Connect (OSTI)

Magnetic flux compression generators rely on the expansion of thin ductile shells to generate magnetic fields. These thin shells are filled with high explosives, which when detonated, cause the shell to expand to over 200% strain at strain-rates on the order of 10{sup 4} s{sup {minus}1}. Experimental data indicate the development and growth of multiple plastic instabilities which appear in a quasi-periodic pattern on the surfaces of the shells. These quasi-periodic instabilities are connected by localized zones of intense shear that are oriented approximately 45{degree} from the outward radial direction. The quasi-periodic instabilities continue to develop and eventually become through-cracks, causing the shell to fragment. A viscoplastic constitutive model is formulated to model the high strain-rate expansion and provide insight into the development of plastic instabilities. The formulation of the viscoplastic constitutive model includes the effects of shock heating and damage in the form of microvoid nucleation, growth, and coalescence in the expanding shell. This model uses the Johnson-Cook strength model with the Mie-Grueneisen equation of state and a modified Gurson yield surface. The constitutive model includes the modifications proposed by Tvergaard and the plastic strain controlled nucleation introduced by Neeleman. The constitutive model is implemented as a user material subroutine into ABAQUS/Explicit, which is a commercially available nonlinear explicit dynamic finite element program. A cylindrical shell is modeled using both axisymmetric and plane strain elements. Two experiments were conducted involving plane wave detonated, explosively filled, copper cylinders. Instability, displacement, and velocity data were recorded using a fast framing camera and a Fabry-Perot interferometer. Good agreement is shown between the numerical results and experimental data. An additional explosively bulged cylinder experiment was also performed and a photomicrograph of an instability is shown to provide a qualitative comparison between the experimental observations and the numerical predictions.

Martineau, R.L.

1998-04-01T23:59:59.000Z

466

Nuclear Models and Nuclear Fission  

Science Journals Connector (OSTI)

The hindrance to spontaneous fission by the odd nucleon in the fissioning nucleus may be explained as due to the pairing energy of the odd nucleon at the saddle-point deformation.

Peter Fong

1961-06-01T23:59:59.000Z

467

R. Shane Johnson, Associate Director Office of Advanced Nuclear Research  

Broader source: Energy.gov (indexed) [DOE]

Advanced Nuclear Research Advanced Nuclear Research September 30, 2002 Generation IV International Forum Generation IV International Forum Presentation to the Nuclear Energy Research Advisory Committee Office of Nuclear Energy, Science and Technology Generation IV International Forum Generation IV International Forum 6 Government-sanctioned organization working together to plan the future of nuclear energy * Chartered in July 2002 * Conduct joint R&D on next-generation nuclear energy systems * Voluntary member participation in specific projects 6 Observer Organizations * OECD-NEA * IAEA * Euratom South Korea U.S.A. Argentina Brazil Canada France Japan South Africa United Kingdom Switzerland Office of Nuclear Energy, Science and Technology

468

Nuclear Science Day live webinar (National Nuclear Science Week) - Argonne  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Nuclear Science Day live webinar Nuclear Science Day live webinar Search Go Home Postdocs Students Student Outreach Resources for Schools U.S.-based International (English) International (Other) Events IGED 2013 Science Careers in Search of Women Girls, choose a career in Nuclear Science and Technology! Argonne Nuclear Engineers tell why they chose a Nuclear Career Resources Contact Us Recent Events Science Careers in Search of Women, Apr. 18, 2013 Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society', Jan. 26, 2013 Getting to know nuclear energy: the past, the present & the future - free public lecture (Nov. 15, 2012, Argonne National Laboratory) On January 26, 2013, Argonne staff members participated in the Junior Girl Scout Workshop 'Atomic Fission Fun with the American Nuclear Society'

469

A Neural Network Model for the Tomographic Analysis of Irradiated Nuclear Fuel Rods  

SciTech Connect (OSTI)

A tomographic method based on a multilayer feed-forward artificial neural network is proposed for the reconstruction of gamma-radioactive fission product distribution in irradiated nuclear fuel rods. The quality of the method is investigated as compared to a conventional technique on experimental results concerning a Canada deuterium uranium reactor (CANDU)-type fuel rod irradiated in a TRIGA reactor.

Craciunescu, Teddy [National Institute of Nuclear Physics and Engineering (Romania)

2004-04-15T23:59:59.000Z

470

August 24~28, 2014 International Convention Center (ICC) Jeju, Jeju Island, Korea  

E-Print Network [OSTI]

Symposium on Future I&C for Nuclear Power Plants International Symposium on Symbiotic Nuclear Power Systems, Jeju Island, Korea International Symposium on Future I&C for Nuclear Power Plants International Symposium on Symbiotic Nuclear Power Systems ISOFIC/ISSNP 2014 www.isofic.org #12;Contents 04 06 06 07 09 10

471

CFD modeling of buoyancy driven cavities with internal heat source -Application to heated rooms  

E-Print Network [OSTI]

comparisons are given with regard to heat transfer to the walls as well as to heat source behavior and plume. Keywords: CFD - Computational Fluid Dynamics modeling; buoyancy driven cavity; heat source; thermal plume enclosure helps to accurately assess the heat transfer phenomena that take place across the building

472

Management of National Nuclear Power Programs for assured safety  

SciTech Connect (OSTI)

Topics discussed in this report include: nuclear utility organization; before the Florida Public Service Commission in re: St. Lucie Unit No. 2 cost recovery; nuclear reliability improvement and safety operations; nuclear utility management; training of nuclear facility personnel; US experience in key areas of nuclear safety; the US Nuclear Regulatory Commission - function and process; regulatory considerations of the risk of nuclear power plants; overview of the processes of reliability and risk management; management significance of risk analysis; international and domestic institutional issues for peaceful nuclear uses; the role of the Institute of Nuclear Power Operations (INPO); and nuclear safety activities of the International Atomic Energy Agency (IAEA).

Connolly, T.J. (ed.)

1985-01-01T23:59:59.000Z

473

Environment and Nuclear Programs | Department of Energy  

Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

Environment and Nuclear Programs Environment and Nuclear Programs Environment and Nuclear Programs Cooling Tower Reflection | Credit: DOE Archives Cooling Tower Reflection | Credit: DOE Archives Offices of the Deputy General Counsel for Environment and Nuclear Programs Office of the Assistant General Counsel for Environment (GC-51) Office of the Assistant General Counsel for Civilian Nuclear Programs (GC-52 ) Office of the Assistant General Counsel for International and National Security Programs (GC-53) Office of NEPA Policy and Compliance (GC-54) Office of Standard Contract Management (GC-55) Litigation and Enforcement Environment and Nuclear Programs Environment Civilian Nuclear Programs International and National Security Programs NEPA Policy and Compliance Standard Contract Management Technology Transfer and Procurement

474

Internal Control Program  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To ensure sound internal controls and overall consistency in exercising the statutory authorities that vest in the Secretary, the Administrator, National Nuclear Security Administration (NNSA), and Department's Chief Financial Officer (CFO), and to implement the Federal Managers' Financial Integrity Act of 1982 and related central agency guidance. Cancels DOE O 413.1A.

2008-10-28T23:59:59.000Z

475

7 - Assessing and modelling the performance of nuclear waste and associated packages for long-term management  

Science Journals Connector (OSTI)

Abstract: Examples of analytical approaches and methodologies for modelling the behaviour of waste forms and waste package metals in long-term management of spent nuclear fuel (SNF) and high level waste (HLW) are presented. Two cases, long-term geological disposal and interim extended dry storage, are considere