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1

Actinide separations conference  

SciTech Connect (OSTI)

This report contains the abstracts for 55 presentations given at the fourteenth annual Actinide Separations Conference. (JDL)

Not Available

1990-01-01T23:59:59.000Z

2

33rd Actinide Separations Conference  

SciTech Connect (OSTI)

Welcome to the 33rd Actinide Separations Conference hosted this year by the Lawrence Livermore National Laboratory. This annual conference is centered on the idea of networking and communication with scientists from throughout the United States, Britain, France and Japan who have expertise in nuclear material processing. This conference forum provides an excellent opportunity for bringing together experts in the fields of chemistry, nuclear and chemical engineering, and actinide processing to present and discuss experiences, research results, testing and application of actinide separation processes. The exchange of information that will take place between you, and other subject matter experts from around the nation and across the international boundaries, is a critical tool to assist in solving both national and international problems associated with the processing of nuclear materials used for both defense and energy purposes, as well as for the safe disposition of excess nuclear material. Granlibakken is a dedicated conference facility and training campus that is set up to provide the venue that supports communication between scientists and engineers attending the 33rd Actinide Separations Conference. We believe that you will find that Granlibakken and the Lake Tahoe views provide an atmosphere that is stimulating for fruitful discussions between participants from both government and private industry. We thank the Lawrence Livermore National Laboratory and the United States Department of Energy for their support of this conference. We especially thank you, the participants and subject matter experts, for your involvement in the 33rd Actinide Separations Conference.

McDonald, L M; Wilk, P A

2009-05-04T23:59:59.000Z

3

E-Print Network 3.0 - actinide separations conference Sample...  

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

region 1, 2. 2. Separation in-29;ight and the parent21;daughter method for heavy... . Mnzenberg et al., Proc. Actinides-1981 Conference, Paci28;c Grove, Cali-...

4

Nineteenth annual actinide separations conference: Conference program and abstracts  

SciTech Connect (OSTI)

This report contains the abstracts from the conference presentations. Sessions were divided into the following topics: Waste treatment; Spent fuel treatment; Issues and responses to Defense Nuclear Facility Safety Board 94-1; Pyrochemical technologies; Disposition technologies; and Aqueous separation technologies.

Bronson, M. [ed.

1995-12-31T23:59:59.000Z

5

Actinide Separation Science and Technology  

Science Journals Connector (OSTI)

Both the science and technology of the actinides as we know them today owe much to separation science. Conversely, the field of metal ion separations, solvent extraction, and ion exchange in particular, would ...

Kenneth L. Nash; Charles Madic…

2011-01-01T23:59:59.000Z

6

Actinide Separation Science and Technology  

Science Journals Connector (OSTI)

Both the science and technology of the actinides as we know them today owe much to separation science. Conversely, the field of metal ion separations, solvent extraction, and ion exchange in particular, would ...

Kenneth L. Nash; Charles Madic…

2006-01-01T23:59:59.000Z

7

Actinide Lanthanide Separation Process – ALSEP  

SciTech Connect (OSTI)

Separation of the minor actinides (Am, Cm) from the lanthanides at an industrial scale remains a significant technical challenge for closing the nuclear fuel cycle. To increase the safety of used nuclear fuel (UNF) reprocessing, as well as reduce associated costs, a novel solvent extraction process has been developed. The process allows for partitioning minor actinides, lanthanides and fission products following uranium/plutonium/neptunium removal; minimizing the number of separation steps, flowsheets, chemical consumption, and waste. This new process, Actinide Lanthanide SEParation (ALSEP), uses an organic solvent consisting of a neutral diglycolamide extractant, either N,N,N',N'-tetra(2 ethylhexyl)diglycolamide (T2EHDGA) or N,N,N',N'-tetraoctyldiglycolamide (TODGA), and an acidic extractant 2-ethylhexylphosphonic acid mono-2-ethylhexyl ester (HEH[EHP]), dissolved in an aliphatic diluent (e.g. n-dodecane). The An/Ln co-extraction is conducted from moderate-to-strong nitric acid, while the selective stripping of the minor actinides from the lanthanides is carried out using a polyaminocarboxylic acid/citrate buffered solution at pH anywhere between 3 and 4.5. The extraction and separation of the actinides from the fission products is very effective in a wide range of HNO3 concentrations and the minimum separation factors for lanthanide/Am exceed 30 for Nd/Am, reaching > 60 for Eu/Am under some conditions. The experimental results presented here demonstrate the great potential for a combined system, consisting of a neutral extractant such as T2EHDGA or TODGA, and an acidic extractant such as HEH[EHP], for separating the minor actinides from the lanthanides.

Gelis, Artem V.; Lumetta, Gregg J.

2014-01-29T23:59:59.000Z

8

Separation of actinides from lanthanides utilizing molten salt electrorefining  

SciTech Connect (OSTI)

TRUMP-S (TRansUranic Management through Pyropartitioning Separation) is a pyrochemical process being developed to separate actinides form fission products in nuclear waste. A key process step involving molten salt electrorefining to separate actinides from lanthanides has been studied on a laboratory scale. Electrorefining of U, Np, Pu, Am, and lanthanide mixtures from molten cadmium at 450 C to a solid cathode utilizing a molten chloride electrolyte resulted in > 99% removal of actinides from the molten cadmium and salt phases. Removal of the last few percent of actinides is accompanied by lowered cathodic current efficiency and some lanthanide codeposition. Actinide/lanthanide separation ratios on the cathode are ordered U > Np > Pu > Am and are consistent with predictions based on equilibrium potentials.

Grimmett, D.L.; Fusselman, S.P.; Roy, J.J.; Gay, R.L. [Rockwell International, Canoga Park, CA (United States). Rocketdyne Div.; Krueger, C.L.; Storvick, T.S. [Univ. of Missouri, Columbia, MO (United States). Research Reactor Facility; Inoue, T.; Hijikata, T. [Central Research Inst. of Electric Power Industry, Tokyo (Japan). Komae Research Lab.; Takahashi, N. [Kawasaki Heavy Industries, Ltd., Tokyo (Japan). Nuclear Systems Div.

1996-10-01T23:59:59.000Z

9

Grouped actinide separation in advanced nuclear fuel cycles  

SciTech Connect (OSTI)

Aiming at cleaner waste streams (containing only the short-lived fission products) a partitioning and transmutation (P-T) scheme can significantly reduce the quantities of long-lived radionuclides consigned to waste. Many issues and options are being discussed and studied at present in view of selecting the optimal route. The choice is between individual treatment of the relevant elements and a grouped treatment of all actinides together. In the European Collaborative Project ACSEPT (Actinide recycling by Separation and Transmutation), grouped separation options derived from an aqueous extraction or from a dry pyroprocessing route were extensively investigated. Successful demonstration tests for both systems have been carried out in the frame of this project. The aqueous process called GANEX (Grouped Actinide Extraction) is composed of 2 cycles, a first one to recover the major part of U followed by a co-extraction of Np, Pu, Am, and Cm altogether. The pyro-reprocessing primarily applicable to metallic fuels such as the U-Pu-Zr alloy originally developed by the Argonne National Laboratory (US) in the mid 1980s, has also been applied to the METAPHIX fuels containing up to 5% of minor actinides and 5% of lanthanides (e.g. U{sub 60}Pu{sub 20}-Zr{sub 10}Am{sub 2}Nd{sub 3.5}Y{sub 0.5}Ce{sub 0.5}Gd{sub 0.5}). A grouped actinide separation has been successfully carried out by electrorefining on solid Al cathodes. At present the recovery of the actinides from the alloy formed with Al upon electrodeposition is under investigation, because an efficient P-T cycle requires multiple re-fabrication and re-irradiation. (authors)

Glatz, J.P.; Malmbeck, R.; Ougier, M.; Soucek, P. [Joint Research Center - Institute for Transuranium Elements, P.O. Box 2340, D-76125 Karlsruhe (Germany); Murakamin, T.; Tsukada, T.; Koyama, T. [Central Research Institute of Electric Power Industry (CRIEPI), Komaeshi, Tokyo 201-8511 (Japan)

2013-07-01T23:59:59.000Z

10

Supercritical Fluid Extraction and Separation of Uranium from Other Actinides  

SciTech Connect (OSTI)

This paper investigates the feasibility of separating uranium from other actinides by using supercritical fluid carbon dioxide (sc-CO2) as a solvent modified with tri-n-butylphosphate (TBP) for the development of an extraction and counter current stripping technique, which would be a more efficient and environmentally benign technology for used nuclear fuel reprocessing compared to traditional solvent extraction. Several actinides (U(VI), Np(VI), Pu(IV), and Am(III)) were extracted in sc-CO2 modified with TBP over a range of nitric acid concentrations and then the actinides were exposed to reducing and complexing agents to suppress their extractability. According to this study, the separation of uranium from plutonium in sc-CO2 modified with TBP was successful at nitric acid concentrations of less than 3 M in the presence of acetohydroxamic acid or oxalic acid, and the separation of uranium from neptunium was successful at nitric acid concentrations of less than 1 M in the presence of acetohydroxamic acid, oxalic acid, or sodium nitrite.

Donna L. Quach; Bruce J. Mincher; Chien M. Wai

2014-06-01T23:59:59.000Z

11

RAPID SEPARATION METHOD FOR ACTINIDES IN EMERGENCY SOIL SAMPLES  

SciTech Connect (OSTI)

A new rapid method for the determination of actinides in soil and sediment samples has been developed at the Savannah River Site Environmental Lab (Aiken, SC, USA) that can be used for samples up to 2 grams in emergency response situations. The actinides in soil method utilizes a rapid sodium hydroxide fusion method, a lanthanum fluoride soil matrix removal step, and a streamlined column separation process with stacked TEVA, TRU and DGA Resin cartridges. Lanthanum was separated rapidly and effectively from Am and Cm on DGA Resin. Vacuum box technology and rapid flow rates are used to reduce analytical time. Alpha sources are prepared using cerium fluoride microprecipitation for counting by alpha spectrometry. The method showed high chemical recoveries and effective removal of interferences. This new procedure was applied to emergency soil samples received in the NRIP Emergency Response exercise administered by the National Institute for Standards and Technology (NIST) in April, 2009. The actinides in soil results were reported within 4-5 hours with excellent quality.

Maxwell, S.; Culligan, B.; Noyes, G.

2009-11-09T23:59:59.000Z

12

RAPID SEPARATION METHOD FOR ACTINIDES IN EMERGENCY AIR FILTER SAMPLES  

SciTech Connect (OSTI)

A new rapid method for the determination of actinides and strontium in air filter samples has been developed at the Savannah River Site Environmental Lab (Aiken, SC, USA) that can be used in emergency response situations. The actinides and strontium in air filter method utilizes a rapid acid digestion method and a streamlined column separation process with stacked TEVA, TRU and Sr Resin cartridges. Vacuum box technology and rapid flow rates are used to reduce analytical time. Alpha emitters are prepared using cerium fluoride microprecipitation for counting by alpha spectrometry. The purified {sup 90}Sr fractions are mounted directly on planchets and counted by gas flow proportional counting. The method showed high chemical recoveries and effective removal of interferences. This new procedure was applied to emergency air filter samples received in the NRIP Emergency Response exercise administered by the National Institute for Standards and Technology (NIST) in April, 2009. The actinide and {sup 90}Sr in air filter results were reported in {approx}4 hours with excellent quality.

Maxwell, S.; Noyes, G.; Culligan, B.

2010-02-03T23:59:59.000Z

13

Advanced Extraction Methods for Actinide/Lanthanide Separations  

SciTech Connect (OSTI)

The separation of An(III) ions from chemically similar Ln(III) ions is perhaps one of the most difficult problems encountered during the processing of nuclear waste. In the 3+ oxidation states, the metal ions have an identical charge and roughly the same ionic radius. They differ strictly in the relative energies of their f- and d-orbitals, and to separate these metal ions, ligands will need to be developed that take advantage of this small but important distinction. The extraction of uranium and plutonium from nitric acid solution can be performed quantitatively by the extraction with the TBP (tributyl phosphate). Commercially, this process has found wide use in the PUREX (plutonium uranium extraction) reprocessing method. The TRUEX (transuranium extraction) process is further used to coextract the trivalent lanthanides and actinides ions from HLLW generated during PUREX extraction. This method uses CMPO [(N, N-diisobutylcarbamoylmethyl) octylphenylphosphineoxide] intermixed with TBP as a synergistic agent. However, the final separation of trivalent actinides from trivalent lanthanides still remains a challenging task. In TRUEX nitric acid solution, the Am(III) ion is coordinated by three CMPO molecules and three nitrate anions. Taking inspiration from this data and previous work with calix[4]arene systems, researchers on this project have developed a C3-symmetric tris-CMPO ligand system using a triphenoxymethane platform as a base. The triphenoxymethane ligand systems have many advantages for the preparation of complex ligand systems. The compounds are very easy to prepare. The steric and solubility properties can be tuned through an extreme range by the inclusion of different alkoxy and alkyl groups such as methyoxy, ethoxy, t-butoxy, methyl, octyl, t-pentyl, or even t-pentyl at the ortho- and para-positions of the aryl rings. The triphenoxymethane ligand system shows promise as an improved extractant for both tetravalent and trivalent actinide recoveries form high level liquid wastes and a general actinide clean-up procedure. The selectivity of the standard extractant for tetravalent actinides, (N,N-diisobutylcarbamoylmethyl) octylphenylphosphineoxide (CMPO), was markedly improved by the attachment of three CMPO-like functions onto a triphenoxymethane platform, and a ligand that is both highly selective and effective for An(IV) ions was isolated. A 10 fold excess of ligand will remove virtually all of the 4+ actinides from the acidic layer without extracting appreciable quantities of An(III) and Ln(III) unlike simple CMPO ligands. Inspired by the success of the DIAMEX industrial process for extractions, three new tripodal chelates bearing three diglycolamide and thiodiglycolamide units precisely arranged on a triphenoxymethane platform have been synthesized for an highly efficient extraction of trivalent f-element cations from nitric acid media. A single equivalent of ligand will remove 80% of the Ln(III) ion from the acidic layer since the ligand is perfectly suited to accommodate the tricapped trigonal prismatic geometry preferred by the metal center. The ligand is perhaps the most efficient binder available for the heavier lanthanides and due to this unique attribute, the extraction event can be easily followed by 1H NMR spectroscopy confirming the formation of a TPP complex. The most lipophilic di-n-butyl tris-diglycolamide was found to be a significantly weaker extractant in comparison to the di-isopropyl analogs. The tris-thiodiglycolamide derivative proved to be an ineffective chelate for f-elements and demonstrated the importance of the etheric oxygens in the metal binding. The results presented herein clearly demonstrate a cooperative action of these three ligating groups within a single molecule, confirmed by composition and structure of the extracted complexes, and since actinides prefer to have high coordination numbers, the ligands should be particularly adept at binding with three arms. The use of such an extractant permits the extraction of metal ions form highly acidic environment through the ability

Scott, M.J.

2005-12-01T23:59:59.000Z

14

Synthesis of a triblock polymer system for separation of actinides for nuclear waste remediation.  

E-Print Network [OSTI]

??Nuclear power waste contains radioactive isotopes with long half lives and the problem lies in the fact that the lanthanides and actinides must be separated… (more)

Hamilton, Doris Finley

2011-01-01T23:59:59.000Z

15

Novel complexing agents for the efficient separation of actinides and remediation of actinide-contaminated sites  

SciTech Connect (OSTI)

Research into the coordination chemistry of transactinide elements should provide us with new fundamental knowledge about structure, geometry, and stability of these metal complexes. Our approach involves the design, synthesis, and characterization of {open_quotes}expanded porphyrin{close_quotes} macrocyclic ligands which coordinate the actinide metal cations with high thermodynamic affinity and kinetic stability. We can use the knowledge from understanding the fundamental coordination chemistry of these elements as a stepping stone to heavy metal detoxification, radioactive waste cleanup, and possibly radioactive isotope separation. The critical components of this research endeavor, along with the viability of metal complex formation, will be correlated to ring size and core geometry of the ligand and, the atomic radius, oxidation state, coordination geometry and coordination number of the transactinium metal ion. These chelating agents may have certain applications to the solution of some radioactive waste problems if they can be attached to polymer supports and used to chemically separate the radioactive components in waste.

Baisden, P.; Kadkhodayan, B.

1996-03-15T23:59:59.000Z

16

Conjugates of Actinide Chelator-Magnetic Nanoparticles for Used Fuel Separation Technology  

SciTech Connect (OSTI)

The actinide separation method using magnetic nanoparticles (MNPs) functionalized with actinide specific chelators utilizes the separation capability of ligand and the ease of magnetic separation. This separation method eliminated the need of large quantity organic solutions used in the liquid-liquid extraction process. The MNPs could also be recycled for repeated separation, thus this separation method greatly reduces the generation of secondary waste compared to traditional liquid extraction technology. The high diffusivity of MNPs and the large surface area also facilitate high efficiency of actinide sorption by the ligands. This method could help in solving the nuclear waste remediation problem.

You Qiang; Andrzej Paszczynski; Linfeng Rao

2011-10-30T23:59:59.000Z

17

E-Print Network 3.0 - actinides separation chemistry Sample Search...  

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

separation chemistry Search Powered by Explorit Topic List Advanced Search Sample search results for: actinides separation chemistry Page: << < 1 2 3 4 5 > >> 1 www.emsl.pnl.gov...

18

Electrochemical separation of actinides and fission products in molten salt electrolyte  

SciTech Connect (OSTI)

Molten salt electrochemical separation may be applied to accelerator-based conversion (ABC) and transmutation systems by dissolving the fluoride transport salt in LiCl-KCl eutectic solvent. The resulting fluoride-chloride mixture will contain small concentrations of fission product rare earths (La, Nd, Gd, Pr, Ce, Eu, Sm, and Y) and actinides (U, Np, Pu, Am, and Cm). The Gibbs free energies of formation of the metal chlorides are grouped advantageously such that the actinides can be deposited on a solid cathode with the majority of the rare earths remaining in the electrolyte. Thus, the actinides are recycled for further transmutation. Rockwell and its partners have measured the thermodynamic properties of the metal chlorides of interest (rare earths and actinides) and demonstrated separation of actinides from rare earths in laboratory studies. A model is being developed to predict the performance of a commercial electrochemical cell for separations starting with PUREX compositions. This model predicts excellent separation of plutonium and other actinides from the rare earths in metal-salt systems.

Gay, R. L.; Grantham, L. F.; Fusselman, S. P.; Grimmett, D. L.; Roy, J. J. [Rockwell International/Rocketdyne Division Canoga Park, California 91309-7922 (United States)

1995-09-15T23:59:59.000Z

19

Actinide-lanthanide separation with solvents on the base of amides of heterocyclic diacids  

SciTech Connect (OSTI)

The separation of actinides from lanthanides with a particular emphasis on Am(III) from Eu(III) with amides of heterocyclic dicarboxylic diacids was reviewed. It was shown that the di-amides of the 2,2'-dipyridyl-6,6'-dicarboxylic acid are the most promising ligands for the simultaneous selective recovery of actinides from HLLW (high level radioactive liquid waste) within the GANEX concept. (author)

Babain, V.A.; Alyapyshev, M.Y.; Tkachenko, L.I. [Khlopin Radium Institute, 28, 2ndMurinski pr., St-Petersburg, Russia 19402 (Russian Federation)

2013-07-01T23:59:59.000Z

20

Sequential separation of actinide elements from highly radioactive Hanford waste by ion exchange methods  

SciTech Connect (OSTI)

A simple, rapid method has been developed for the sequential separation of actinide elements from samples with high salt content such as these resulting from efforts to characterize Hanford storage tank waste. Actinide elements in 9M HC1 solution are introduced into an anion exchange column. U(VI), Np(IV) and Pu(IV) are retained on the column while Am(III) passes through. Plutonium is eluted first, reductively; after which neptunium and then uranium are eluted with mixtures of HC1 and HF. The Am(III) is purified by cation exchange in a nitric acid system. 14 refs., 2 tabs.

Maiti, T.C.; Kaye, J.H.; Kozelisky, A.E.

1991-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Conjugates of Magnetic Nanoparticle -- Actinide Specific Chelator for Radioactive Waste Separation  

SciTech Connect (OSTI)

A novel nanotechnology for the separation of radioactive waste that uses magnetic nanoparticles (MNPs) conjugated with actinide specific chelators (MNP-Che) is reviewed with a focus on design and process development. The MNP-Che separation process is an effective way of separating heat generating minor actinides (Np, Am, Cm) from spent nuclear fuel solution to reduce the radiological hazard. It utilizes coated MNPs to selectively adsorb the contaminants onto their surfaces, after which the loaded particles are collected using a magnetic field. The MNP-Che conjugates can be recycled by stripping contaminates into a separate, smaller volume of solution, and then become the final waste form for disposal after reusing number of times. Due to the highly selective chelators, this remediation method could be both simple and versatile while allowing the valuable actinides to be recovered and recycled. Key issues standing in the way of large-scale application are stability of the conjugates and their dispersion in solution to maintain their unique properties, especially large surface area, of MNPs. With substantial research progress made on MNPs and their surface functionalization, as well as development of environmentally benign chelators, this method could become very flexible and cost-effective for recycling used fuel. Finally, the development of this nanotechnology is summarized and its future direction is discussed.

Maninder Kaur; Huijin Zhang; Leigh Martin; Terry Todd; You Qiang

2013-11-01T23:59:59.000Z

22

Thermally unstable complexants: Stability of lanthanide/actinide complexes, thermal instability of the ligands, and applications in actinide separations  

SciTech Connect (OSTI)

Water soluble complexing agents are commonly used in separations to enhance the selectivity of both ion exchange and solvent extraction processes. Applications of this type in the treatment of nuclear wastes using conventional complexing agents have found mixed success due to the nature of the complexants. In addition, the residual solutions containing these species have led to potentially serious complications in waste storage. To overcome some of the limitations of carboxylic acid and aminopolycarboxylate ligands, we have initiated a program to investigate the complexing ability, thermal/oxidative instability, and separation potential of a group of water soluble organophosphorus compounds which we call Thermally Unstable Complexants, or simply TUCS. Complexants of this type appear to be superior to conventional analogues in a number of respects. In this report, we will summarize our research to date on the actinide/lanthanide complexes with a series of substituted methanediphosphonic acids, the kinetics of their oxidative decomposition, and a few applications which have been developed for their use. 17 refs., 5 figs., 3 tab.

Nash, K.L.; Rickert, P.G.

1991-01-01T23:59:59.000Z

23

STRONTIUM AND ACTINIDE SEPARATIONS FROM HIGH LEVEL NUCLEAR WASTE SOLUTIONS USING MONOSODIUM TITANATE 1. SIMULANT TESTING  

SciTech Connect (OSTI)

High-level nuclear waste produced from fuel reprocessing operations at the Savannah River Site (SRS) requires pretreatment to remove {sup 137}Cs, {sup 90}Sr and alpha-emitting radionuclides (i.e., actinides) prior to disposal. Separation processes planned at SRS include caustic side solvent extraction, for {sup 137}Cs removal, and ion exchange/sorption of {sup 90}Sr and alpha-emitting radionuclides with an inorganic material, monosodium titanate (MST). The predominant alpha-emitting radionuclides in the highly alkaline waste solutions include plutonium isotopes {sup 238}Pu, {sup 239}Pu and {sup 240}Pu. This paper provides a summary of data acquired to measure the performance of MST to remove strontium and actinides from simulated waste solutions. These tests evaluated the influence of ionic strength, temperature, solution composition and the oxidation state of plutonium.

HOBBS, D. T.; BARNES, M. J.; PULMANO, R. L.; MARSHALL, K. M.; EDWARDS, T. B.; BRONIKOWSKI, M. G.; FINK, S. D.

2005-04-14T23:59:59.000Z

24

Chapter 6 - The Circuitous Journey from Malonamides to BTPhens: Ligands for Separating Actinides from Lanthanides  

Science Journals Connector (OSTI)

Abstract This account describes the scientific events that have led from malonamides which coextract minor actinide and lanthanide fission products, to the 1,2,4-triazines such as BTBP and \\{BTPhen\\} reagents that are capable of separating Am(III) from Eu(III). The journey started with Mike Hudson having a walk in hot and dusty Rome with Claude Musikas of the CEA in 1980 and continues to Mike enjoying a celebratory beer (or two) in Reading (2012) with Laurence Harwood and Frank Lewis. Throughout the journey, organic synthesis, coupled with coordination chemistry, has been the engine by which successful science has developed.

Michael J. Hudson; Frank W. Lewis; Laurence M. Harwood

2013-01-01T23:59:59.000Z

25

New ion exchangers and solvent extractants for pre-analysis separation of actinides. Annual report, June 1982-May 1983  

SciTech Connect (OSTI)

Prior to radiochemical determination of actinide elements such as uranium, neptunium and plutonium, an ion exchange or solvent extraction method is often employed to separate these from themselves and other interfering elements. In order to improve the separation efficiency and reduce time, cost, and liquid waste of analytical separation methods, new and better ion exchangers and solvent extractants are under evaluation. New microreticular and macroreticular anion exchange resins and bifunctional organophosphorus solvent extractants have been evaluated for uranium, neptunium and plutonium separations. Previous work comparing numerous anion exchange resins has shown the macroreticular Amberlite IRA-938 resin as having the highest actinide capacity and best elution kinetics. Recent studies have confirmed the resin has advantages over others for Pu-U separations. Work at Rocky Flats on bifunctional organophosphorus solvent extractants for the recovery and purification of actinides has led to the identification of several new separation systems applicable for radiochemical analysis. Dihexyl-N,N-diethylcarbamoylmethylphosphonate (DHDECMP), its dibutyl analog DBDECMP, and DHDECMP-tributylphosphate (TBP) using liquid-liquid or extraction chromatography techniques are applicable for plutonium-americium and plutonium separations. Both DHDECMP and DBDECMP extract actinides strongly, extract lanthanides, iron, gallium, molybdenum, titanium, vanadium, zirconium partially, and do not extract most other elements from 5 to 7M nitric acid. With the DHDECMP-TBP and DBDECMP-TBP systems, synergistic effects have been observed for both plutonium and americium. The chemistry and application for pre-analysis separations of these solvent extraction systems are described. 11 references, 9 figures, 7 tables.

Navratil, J.D.

1983-06-01T23:59:59.000Z

26

TAILORING INORGANIC SORBENTS FOR SRS STRONTIUM AND ACTINIDE SEPARATIONS: OPTIMIZED MONOSODIUM TITANATE PHASE II FINAL REPORT  

SciTech Connect (OSTI)

This document provides a final report of Phase II testing activities for the development of a modified monosodium titanate (MST) that exhibits improved strontium and actinide removal characteristics compared to the baseline MST material. The activities included determining the key synthesis conditions for preparation of the modified MST, preparation of the modified MST at a larger scale by a commercial vendor, demonstration of the strontium and actinide removal characteristics with actual tank waste supernate and measurement of filtration characteristics. Key findings and conclusions include the following. Testing evaluated three synthetic methods and eleven process parameters for the optimum synthesis conditions for the preparation on an improved form of MST. We selected the post synthesis method (Method 3) for continued development based on overall sorbate removal performance. We successfully prepared three batches of the modified MST using Method 3 procedure at a 25-gram scale. The laboratory prepared modified MST exhibited increased sorption kinetics with simulated and actual waste solutions and similar filtration characteristics to the baseline MST. Characterization of the modified MST indicated that the post synthesis treatment did not significantly alter the particle size distribution, but did significantly increase the surface area and porosity compared to the original MST. Testing indicated that the modified MST exhibits reduced affinity for uranium compared to the baseline MST, reducing risk of fissile loading. Shelf-life testing indicated no change in strontium and actinide performance removal after storing the modified MST for 12-months at ambient laboratory temperature. The material releases oxygen during the synthesis and continues to offgas after the synthesis at a rapidly diminishing rate until below a measurable rate after 4 months. Optima Chemical Group LLC prepared a 15-kilogram batch of the modified MST using the post synthesis procedure (Method 3). Performance testing with simulated and actual waste solutions indicated that the material performs as well as or better than batches of modified MST prepared at the laboratory-scale. Particle size data of the vendor-prepared modified MST indicates a broader distribution centered at a larger particle size and microscopy shows more irregular particle morphology compared to the baseline MST and laboratory prepared modified MST. Stirred-cell (i.e., dead-end) filter testing revealed similar filtration rates relative to the baseline MST for both the laboratory and vendor-prepared modified MST materials. Crossflow filtration testing indicated that with MST-only slurries, the baseline MST produced between 30-100% higher flux than the vendor-prepared modified MST at lower solids loadings and comparable flux at higher solids loadings. With sludge-MST slurries, the modified MST produced 1.5-2.2 times higher flux than the baseline MST at all solids loadings. Based on these findings we conclude that the modified MST represents a much improved sorbent for the separation of strontium and actinides from alkaline waste solutions and recommend continued development of the material as a replacement for the baseline MST for waste treatment facilities at the Savannah River Site.

Hobbs, D; Thomas Peters, T; Michael Poirier, M; Mark Barnes, M; Major Thompson, M; Samuel Fink, S

2007-06-29T23:59:59.000Z

27

Aqueous Biphasic Systems Based on Salting-Out Polyethylene Glycol or Ionic Solutions: Strategies for Actinide or Fission Product Separations  

SciTech Connect (OSTI)

Aqueous biphasic systems can be formed by salting-out (with kosmotropic, waterstructuring salts) water soluble polymers (e.g., polyethylene glycol) or aqueous solutions of a wide range of hydrophilic ionic liquids based on imidazolium, pyridinium, phosphonium and ammonium cations. The use of these novel liquid/liquid biphases for separation of actinides or other fission products associated with nuclear wastes (e.g., pertechnetate salts) has been demonstrated and will be described in this presentation.

Rogers, Robin D.; Gutowski, Keith E.; Griffin, Scott T.; Holbrey, John D.

2004-03-29T23:59:59.000Z

28

Experimental Findings On Minor Actinide And Lanthanide Separations Using Ion Exchange  

SciTech Connect (OSTI)

This project seeks to determine if inorganic or hybrid inorganic ion-exchange materials can be exploited to provide effective americium and curium separations. Specifically, we seek to understand the fundamental structural and chemical factors responsible for the selectivity of the tested ion-exchange materials for actinide and lanthanide ions. During FY13, experimental work focused in the following areas: (1) investigating methods to oxidize americium in dilute nitric acid with subsequent ion-exchange performance measurements of ion exchangers with the oxidized americium and (2) synthesis, characterization and testing of ion-exchange materials. Ion-exchange materials tested included alkali titanates, alkali titanosilicates, carbon nanotubes and group(IV) metal phosphonates. Americium oxidation testing sought to determine the influence that other redox active components may have on the oxidation of Am(III). Experimental findings indicated that Pu(IV) is oxidized to Pu(VI) by peroxydisulfate, but there are no indications that the presence of plutonium affects the rate or extent of americium oxidation at the concentrations of peroxydisulfate being used. Tests also explored the influence of nitrite on the oxidation of Am(III). Given the formation of Am(V) and Am(VI) in the presence of nitrite, it appears that nitrite is not a strong deterrent to the oxidation of Am(III), but may be limiting Am(VI) by quickly reducing Am(VI) to Am(V). Interestingly, additional absorbance peaks were observed in the UV-Vis spectra at 524 and 544 nm in both nitric acid and perchloric acid solutions when the peroxydisulfate was added as a solution. These peaks have not been previously observed and do not correspond to the expected peak locations for oxidized americium in solution. Additional studies are in progress to identify these unknown peaks. Three titanosilicate ion exchangers were synthesized using a microwave-accelerated reaction system (MARS?) and determined to have high affinities for lanthanide ions in dilute nitric acid. The K-TSP ion exchanger exhibited the highest affinity for lanthanides in dilute nitric acid solutions. The Ge-TSP ion exchanger shows promise as a material with high affinity, but additional tests are needed to confirm the preliminary results. On the other hand, carbon nanotubes and nitrogen-doped carbon nanotubes exhibited low, but measureable affinities for lanthanide ions in dilute nitric acid solutions (pH 3 and 6). The MWCNT exhibited much lower affinities than the K-TSP in dilute nitric acid solutions. However, the MWCNT are much more chemically stable in concentrated nitric acid solutions and, therefore, may be candidates for ion exchange in more concentrated nitric acid solutions.

Hobbs, D. T.; Shehee, T. C.; Clearfield, A.

2013-09-17T23:59:59.000Z

29

Use of Soft Heterocyclic N-Donor Ligands To Separate Actinides and Lanthanides  

Science Journals Connector (OSTI)

The removal of the most long-lived radiotoxic elements from used nuclear fuel, minor actinides, is foreseen as an essential step toward increasing the public acceptance of nuclear energy as a key component of a low-carbon energy future. Once removed from ...

Michael J. Hudson; Laurence M. Harwood; Dominic M. Laventine; Frank W. Lewis

2012-08-06T23:59:59.000Z

30

Actinide Chemistry  

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

Actinide Chemistry Actinide chemistry serves a critical role in addressing global threats Project Description At Los Alamos, scientists are using actinide analytical chemistry to...

31

Review of Possible Technologies for Actinide Separations Using Other Extractants Than TBP  

Science Journals Connector (OSTI)

The properties of the extractants suitable for the new types of separations needed in the nuclear fuel cycle are reviewed. N,N-dialkylamides (RCO-NR’2), diamides ((RR’NCO)2CHR”), dialkylcarbamoylmethylenephosphon...

C. Musikas

1999-01-01T23:59:59.000Z

32

Separation of actinides from Low Level Liquid Wastes (LLLW) by extraction chromatography using novel DMDOHEMA and TODGA impregnated resins  

Science Journals Connector (OSTI)

The uptake of several actinides [U(VI), Th(IV), Am(III), Cm(III)] and fission products was investigated from nitric acid solutions by two novel extraction chromatographic sorbents containing 2-(2-hexyloxy-ethy...

K. Van Hecke; G. Modolo

2004-08-01T23:59:59.000Z

33

Actinide Chemistry  

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

Actinide Chemistry Actinide Chemistry Actinide Chemistry Research into alternative forms of energy, especially energy security, is one of the major national security imperatives of this century. Get Expertise David Gallimore Actinide Analytical Chemistry Email Rebecca Chamberlin Actinide Analytical Chemistry Email Josh Smith Chemistry Communications Email Along with the lanthanides, they are often called "the f-elements" because they have valence electrons in the f shell. Actinide chemistry serves a critical role in addressing global threats Project Description At Los Alamos, scientists are using actinide analytical chemistry to identify and quantify the chemical and isotopic composition of materials. Since the Manhattan Project, such work has supported the Laboratory's

34

E-Print Network 3.0 - actinide ma recycling Sample Search Results  

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

by a chemical process. These plants can however not separate neptunium, americium and curium (minor actinides... to developing a process for separation of the minor actinides...

35

Environmental research on actinide elements  

SciTech Connect (OSTI)

The papers synthesize the results of research sponsored by DOE's Office of Health and Environmental Research on the behavior of transuranic and actinide elements in the environment. Separate abstracts have been prepared for the 21 individual papers. (ACR)

Pinder, J.E. III; Alberts, J.J.; McLeod, K.W.; Schreckhise, R.G. (eds.)

1987-08-01T23:59:59.000Z

36

Feasibility of actinide separation from UREX-like raffinates using a combination of sulfur- and oxygen-donor extractants  

SciTech Connect (OSTI)

A synergistic combination of bis(o-trifluoromethylphenyl)dithiosphosphinic acid and trioctylphosphine oxide has been recently shown to selectively remove uranium, neptunium, plutonium and americium from aqueous environment containing up to 0.5 M nitric acid and 5.5 g/L fission products. Here the feasibility of performing this complete actinide recovery from aqueous mixtures is forecasted for a new organic formulation containing sulfur donor extractant of modified structure based on Am(III) and Eu(III) extraction data. A mixture of bis(bis-m,m-trifluoromethyl)phenyl)-dithiosphosphinic acid and TOPO in toluene enhances the extraction performance, accomplishing Am/Eu differentiation in aqueous mixtures up to 1 M nitric acid. The new organic recipe is also less susceptible to oxidative damage resulting from radiolysis.

Peter R. Zalupski; Dean R. Peterman; Catherine L. Riddle

2013-09-01T23:59:59.000Z

37

Feasibility of actinide separation from UREX-like raffinates using a combination of sulfur- and oxygen-donor extractants  

SciTech Connect (OSTI)

A synergistic combination of bis(o-trifluoromethylphenyl)dithios-phosphinic acid and trioctylphosphine oxide has been recently shown to selectively remove uranium, neptunium, plutonium and americium from aqueous environment containing up to 0.5 M nitric acid and 5.5 g/l fission products. Here the feasibility of performing this complete actinide recovery from aqueous mixtures is forecasted for a new organic formulation containing sulfur donor extractant of modified structure based on Am(III) and Eu(III) extraction data. A mixture of bis(bis-m,m-trifluoromethyl)phenyl)-dithios-phosphinic acid and TOPO in toluene enhances the extraction performance, accomplishing Am/Eu differentiation in aqueous mixtures up to 1 M nitric acid. The new organic recipe is also less susceptible to oxidative damage resulting from radiolysis. (authors)

Zalupski, P.R.; Peterman, D.R.; Riddle, C.L. [Idaho National Laboratory, P.O. Box 1625, Idaho Falls, ID 83415 (United States)

2013-07-01T23:59:59.000Z

38

Analysis of large soil samples for actinides  

DOE Patents [OSTI]

A method of analyzing relatively large soil samples for actinides by employing a separation process that includes cerium fluoride precipitation for removing the soil matrix and precipitates plutonium, americium, and curium with cerium and hydrofluoric acid followed by separating these actinides using chromatography cartridges.

Maxwell, III; Sherrod L. (Aiken, SC)

2009-03-24T23:59:59.000Z

39

Managing Inventories of Heavy Actinides  

SciTech Connect (OSTI)

The Department of Energy (DOE) has stored a limited inventory of heavy actinides contained in irradiated targets, some partially processed, at the Savannah River Site (SRS) and Oak Ridge National Laboratory (ORNL). The 'heavy actinides' of interest include plutonium, americium, and curium isotopes; specifically 242Pu and 244Pu, 243Am, and 244/246/248Cm. No alternate supplies of these heavy actinides and no other capabilities for producing them are currently available. Some of these heavy actinide materials are important for use as feedstock for producing heavy isotopes and elements needed for research and commercial application. The rare isotope 244Pu is valuable for research, environmental safeguards, and nuclear forensics. Because the production of these heavy actinides was made possible only by the enormous investment of time and money associated with defense production efforts, the remaining inventories of these rare nuclear materials are an important part of the legacy of the Nuclear Weapons Program. Significant unique heavy actinide inventories reside in irradiated Mark-18A and Mark-42 targets at SRS and ORNL, with no plans to separate and store the isotopes for future use. Although the costs of preserving these heavy actinide materials would be considerable, for all practical purposes they are irreplaceable. The effort required to reproduce these heavy actinides today would likely cost billions of dollars and encompass a series of irradiation and chemical separation cycles for at least 50 years; thus, reproduction is virtually impossible. DOE has a limited window of opportunity to recover and preserve these heavy actinides before they are disposed of as waste. A path forward is presented to recover and manage these irreplaceable National Asset materials for future use in research, nuclear forensics, and other potential applications.

Wham, Robert M [ORNL; Patton, Bradley D [ORNL

2011-01-01T23:59:59.000Z

40

Conference  

Science Journals Connector (OSTI)

...Article Conference BNCOD-5. Fifth British National Conference on Databases, University of Kent at Canterbury in association with The British Computer Society, July 14th-16th 1986....

Conference

1985-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Conference  

E-Print Network [OSTI]

Conference: Stochastic Analysis and Applications---From Mathematical Physics to Mathematical Finance, Princeton, University, Jun. 2008. Malliavin Calculus ...

42

Environmental Impact of the Nuclear Fuel Cycle: Fate of Actinides  

SciTech Connect (OSTI)

The resurgence of nuclear power as a strategy for reducing greenhouse gas (GHG) emissions has, in parallel, revived interest in the environmental impact of actinides. Just as GHG emissions are the main environmental impact of the combustion of fossil fuels, the fate of actinides, consumed and produced by nuclear reactions, determines whether nuclear power is viewed as an environmentally “friendly” source of energy. In this article, we summarize the sources of actinides in the nuclear fuel cycle, how actinides are separated by chemical processing, the development of actinide-bearing materials, and the behavior of actinides in the environment. At each stage, actinides present a unique and complicated behavior because of the 5f electronic configurations.

Ewing, Rodney C.; Runde, W.; Albrecht-Schmitt, Thomas E.

2010-01-01T23:59:59.000Z

43

Conference  

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

Mars Science Laboratory Curiosity rover ChemCam team will present more than two dozen posters and talks next week during the 44th Lunar and Planetary Science Conference in The...

44

Research in actinide chemistry  

SciTech Connect (OSTI)

This research studies the behavior of the actinide elements in aqueous solution. The high radioactivity of the transuranium actinides limits the concentrations which can be studied and, consequently, limits the experimental techniques. However, oxidation state analogs (trivalent lanthanides, tetravalent thorium, and hexavalent uranium) do not suffer from these limitations. Behavior of actinides in the environment are a major USDOE concern, whether in connection with long-term releases from a repository, releases from stored defense wastes or accidental releases in reprocessing, etc. Principal goal of our research was expand the thermodynamic data base on complexation of actinides by natural ligands (e.g., OH[sup [minus

Choppin, G.R.

1993-01-01T23:59:59.000Z

45

NWChem and Actinide Chemistry  

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

ACTINIDE CHEMISTRY MEETS COMPUTATION ACTINIDE CHEMISTRY MEETS COMPUTATION Capturing how contaminants migrate across groundwater-surface water inter- faces is a challenge that researchers at the Department of Energy's EMSL-the Environmental Molecular Sciences Laboratory-are rising to. This challenge, a top priority for waste cleanup efforts at the Hanford Site in Richland, Washington, and other parts of the DOE weapons complex, is being addressed using NWChem, a computational chemistry package developed at EMSL that is designed to run on high-performance parallel supercomputers, such as EMSL's Chinook. NWChem is enabling breakthrough discoveries in actinide behavior and chemistry, in part because it allows researchers to accurately model the dynamical formation, speciation, and redox chemistry of actinide complexes in realistic complex mo-

46

On-line Monitoring of Actinide Concentrations in Molten Salt Electrolyte  

SciTech Connect (OSTI)

Pyroprocessing, a treatment method for spent nuclear fuel (SNF), is currently being studied at the Idaho National Laboratory. The key operation of pyroprocessing which takes place in an electrorefiner is the electrochemical separation of actinides from other constituents in spent fuel. Efficient operation of the electrorefiner requires online monitoring of actinide concentrations in the molten salt electrolyte. Square-wave voltammetry (SWV) and normal pulse voltammetry (NPV) are being investigated to assess their applicability to the measurement of actinide concentrations in the electrorefiner.

Curtis W. Johnson; Mary Lou Dunzik-Gougar; Shelly X. Li

2006-11-01T23:59:59.000Z

47

Actinide phosphonate complexes in aqueous solutions  

SciTech Connect (OSTI)

Complexes formed by actinides with carboxylic acids, polycarboxylic acids, and aminopolycarboxylic acids play a central role in both the basic and process chemistry of the actinides. Recent studies of f-element complexes with phosphonic acid ligands indicate that new ligands incorporating doubly ionizable phosphonate groups (-PO{sub 3}H{sub 2}) have many properties which are unique chemically, and promise more efficient separation processes for waste cleanup and environmental restoration. Simple diphosphonate ligands form much stronger complexes than isostructural carboxylates, often exhibiting higher solubility as well. In this manuscript recent studies of the thermodynamics and kinetics of f-element complexation by 1,1 and 1,2 diphosphonic acid ligands are described.

Nash, K.L.

1993-10-01T23:59:59.000Z

48

Actinide halide complexes  

SciTech Connect (OSTI)

A compound of the formula MX{sub n}L{sub m} wherein M = Th, Pu, Np,or Am thorium, X = a halide atom, n = 3 or 4, L is a coordinating ligand selected from the group consisting of aprotic Lewis bases having an oxygen-, nitrogen-, sulfur-, or phosphorus-donor, and m is 3 or 4 for monodentate ligands or is 2 for bidentate ligands, where n + m = 7 or 8 for monodentate ligands or 5 or 6 for bidentate ligands, a compound of the formula MX{sub n} wherein M, X, and n are as previously defined, and a process of preparing such actinide metal compounds including admixing the actinide metal in an aprotic Lewis base as a coordinating solvent in the presence of a halogen-containing oxidant, are provided.

Avens, L.R.; Zwick, B.D.; Sattelberger, A.P.; Clark, D.L.; Watkin, J.G.

1991-02-07T23:59:59.000Z

49

Environmental Speciation of Actinides  

Science Journals Connector (OSTI)

We also provide an overview of uranium or plutonium speciation and remediation strategies across a range of contaminated sites (e.g., Hanford, WA; Oak Ridge, TN; Rifle, CO; Fernald, OH; Fry Canyon, UT; and Rocky Flats, CO). ... (12) As a result, the majority of actinides, in particular plutonium, neptunium, americium, and curium, are released to the environment from human activities. ... (234-236) The following discussion compares two cases of uranium contamination in the 200 and 300 Areas, respectively, in order to illustrate how the original waste–rock interactions and the physical distribution of uranium-bearing phases are closely coupled with the ultimate speciation and mobility of uranium. ...

Kate Maher; John R. Bargar; Gordon E. Brown, Jr.

2012-11-08T23:59:59.000Z

50

Actinide halide complexes  

DOE Patents [OSTI]

A compound is described of the formula MX[sub n]L[sub m] wherein M is a metal atom selected from the group consisting of thorium, plutonium, neptunium or americium, X is a halide atom, n is an integer selected from the group of three or four, L is a coordinating ligand selected from the group consisting of aprotic Lewis bases having an oxygen-, nitrogen-, sulfur-, or phosphorus-donor, and m is an integer selected from the group of three or four for monodentate ligands or is the integer two for bidentate ligands, where the sum of n+m equals seven or eight for monodentate ligands or five or six for bidentate ligands. A compound of the formula MX[sub n] wherein M, X, and n are as previously defined, and a process of preparing such actinide metal compounds are described including admixing the actinide metal in an aprotic Lewis base as a coordinating solvent in the presence of a halogen-containing oxidant.

Avens, L.R.; Zwick, B.D.; Sattelberger, A.P.; Clark, D.L.; Watkin, J.G.

1992-11-24T23:59:59.000Z

51

Calorimetric assay of minor actinides  

SciTech Connect (OSTI)

This paper reviews the principles of calorimetric assay and evaluates its potential application to the minor actinides (U-232-4, Am-241, Am- 243, Cm-245, Np-237). We conclude that calorimetry and high- resolution gamma-ray isotopic analysis can be used for the assay of minor actinides by adapting existing methodologies for Pu/Am-241 mixtures. In some cases, mixtures of special nuclear materials and minor actinides may require the development of new methodologies that involve a combination of destructive and nondestructive assay techniques.

Rudy, C.; Bracken, D.; Cremers, T.; Foster, L.A.; Ensslin, N.

1996-12-31T23:59:59.000Z

52

Actinide Burning in CANDU Reactors  

SciTech Connect (OSTI)

Actinide burning in CANDU reactors has been studied as a method of reducing the actinide content of spent nuclear fuel from light water reactors, and thereby decreasing the associated long term decay heat load. In this work simulations were performed of actinides mixed with natural uranium to form a mixed oxide (MOX) fuel, and also mixed with silicon carbide to form an inert matrix (IMF) fuel. Both of these fuels were taken to a higher burnup than has previously been studied. The total transuranic element destruction calculated was 40% for the MOX fuel and 71% for the IMF. (authors)

Hyland, B.; Dyck, G.R. [Atomic Energy of Canada Limited, Chalk River, Ontario, K0J 1J0 (Canada)

2007-07-01T23:59:59.000Z

53

Casting of metallic fuel containing minor actinide additions  

SciTech Connect (OSTI)

A significant attribute of the Integral Fast Reactor (IFR) concept is the transmutation of long-lived minor actinide fission products. These isotopes require isolation for thousands of years, and if they could be removed from the waste, disposal problems would be reduced. The IFR utilizes pyroprocessing of metallic fuel to separate auranium, plutonium, and the minor actinides from nonfissionable constituents. These materials are reintroduced into the fuel and reirradiated. Spent IFR fuel is expected to contain low levels of americium, neptunium, and curium because the hard neutron spectrum should transmute these isotopes as they are produced. This opens the possibility of using an IFR to trnasmute minor actinide waste from conventional light water reactors (LWRs). A standard IFR fuel is based on the alloy U-20% Pu-10% Zr (in weight percent). A metallic fuel system eases the requirements for reprocessing methods and enables the minor actinide metals to be incorporated into the fuel with simple modifications to the basic fuel casting process. In this paper, the authors report the initial casting experience with minor actinide element addition to an IFR U-Pu-Zr metallic fuel.

Trybus, C.L.; Henslee, S.P. (Argonne National Lab.-West, Idaho Falls, ID (United States)); Sanecki, J.E. (Argonne National Lab., IL (United States))

1992-01-01T23:59:59.000Z

54

HHIM Conference  

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

Small angle neutron scattering pattern from thin films of ErT1-x3Hex Small angle neutron scattering pattern from thin films of ErT1-x3Hex Hydrogen and Helium Isotopes in Materials Conference TEM image of 3He platelet formation along crystallographic planes in ErT1-x3Hex thin film April 20-21, 2010 * Oak Ridge National Laboratory * Oak Ridge, TN, USA Workshop Home Agenda and Important Deadlines Call for Abstracts Registration and Payment Logistics, Hotel, Transportation Presentations Committee/Contacts HHIM 2008 filler Hydrogen and Helium Isotopes in Materials Conference The purpose of this conference is to promote interaction among researchers interested in the behavior of hydrogen and helium isotopes in materials of interest to the tritide, fusion, and actinide science communities as well as those researchers engaged in the development of new reactor materials. The emphasis of the contributed discussion will be the correlation of hydrogen and helium behavior and materials structure-property relationships.

55

Extraction of Actinides and Lanthanides  

Science Journals Connector (OSTI)

Since the actinide ions are classified as hard acids they associate most strongly with hard base complexants. Among these complexants, those with oxygen donor groups have been the most widely used. By contrast...

D. Max Roundhill

2001-01-01T23:59:59.000Z

56

Kinetics of actinide complexation reactions  

SciTech Connect (OSTI)

Though the literature records extensive compilations of the thermodynamics of actinide complexation reactions, the kinetics of complex formation and dissociation reactions of actinide ions in aqueous solutions have not been extensively investigated. In light of the central role played by such reactions in actinide process and environmental chemistry, this situation is somewhat surprising. The authors report herein a summary of what is known about actinide complexation kinetics. The systems include actinide ions in the four principal oxidation states (III, IV, V, and VI) and complex formation and dissociation rates with both simple and complex ligands. Most of the work reported was conducted in acidic media, but a few address reactions in neutral and alkaline solutions. Complex formation reactions tend in general to be rapid, accessible only to rapid-scan and equilibrium perturbation techniques. Complex dissociation reactions exhibit a wider range of rates and are generally more accessible using standard analytical methods. Literature results are described and correlated with the known properties of the individual ions.

Nash, K.L.; Sullivan, J.C.

1997-09-01T23:59:59.000Z

57

Pyrometallurgical processes for recovery of actinide elements  

SciTech Connect (OSTI)

A metallic fuel alloy, nominally U-20-Pu-lOZr, is the key element of the Integral Fast Reactor (IFR) fuel cycle. Metallic fuel permits the use of an innovative, simple pyrometallurgical process, known as pyroprocessing, (the subject of this report), which features fused salt electrorefining of the spent fuel. Electrorefining separates the actinide elements from fission products, without producing a separate stream of plutonium. The plutonium-bearing product is contaminated with higher actinides and with a minor amount of rare earth fission products, making it diversion resistant while still suitable as a fuel material in the fast spectrum of the IFR core. The engineering-scale demonstration of this process will be conducted in the refurbished EBR-II Fuel Cycle Facility, which has entered the start-up phase. An additional pyrometallurgical process is under development for extracting transuranic (TRU) elements from Light Water Reactor (LWR) spent fuel in a form suitable for use as a feed to the IFR fuel cycle. Four candidate extraction processes have been investigated and shown to be chemically feasible. The main steps in each process are oxide reduction with calcium or lithium, regeneration of the reductant and recycle of the salt, and separation of the TRU product from the bulk uranium. Two processes, referred to as the lithium and salt transport (calcium reductant) processes, have been selected for engineering-scale demonstration, which is expected to start in late 1993. An integral part of pyroprocessing development is the treatment and packaging of high-level waste materials arising from the operations, along with the qualification of these waste forms for disposal in a geologic repository.

Battles, J.E.; Laidler, J.J.; McPheeters, C.C.; Miller, W.E.

1994-01-01T23:59:59.000Z

58

Study of solid extractants based on malonamides, diglycolamides, and bipyridines for the partitioning of minor actinides from high active wastes  

Science Journals Connector (OSTI)

In this work, the performance of the solid extractants with polyacrylonitrile (PAN) binding matrix was studied for the separation of lanthanides and actinides from nitric acid solutions. As extractants, incorp...

J. Šul’aková; J. John; F. Šebesta

2006-01-01T23:59:59.000Z

59

Study of solid extractants based on malonamides, diglycolamides, and bipyridines for the partitioning of minor actinides from high active wastes  

Science Journals Connector (OSTI)

In this work, the performance of the solid extractants with polyacrylonitrile (PAN) binding matrix was studied for the separation of lanthanides and actinides from nitric acid solutions. As extractants, incorp...

J. Šul’aková; J. John; F. Šebesta

2006-12-01T23:59:59.000Z

60

Actinide cation-cation complexes  

SciTech Connect (OSTI)

The +5 oxidation state of U, Np, Pu, and Am is a linear dioxo cation (AnO{sub 2}{sup +}) with a formal charge of +1. These cations form complexes with a variety of other cations, including actinide cations. Other oxidation states of actinides do not form these cation-cation complexes with any cation other than AnO{sub 2}{sup +}; therefore, cation-cation complexes indicate something unique about AnO{sub 2}{sup +} cations compared to actinide cations in general. The first cation-cation complex, NpO{sub 2}{sup +}{center_dot}UO{sub 2}{sup 2+}, was reported by Sullivan, Hindman, and Zielen in 1961. Of the four actinides that form AnO{sub 2}{sup +} species, the cation-cation complexes of NpO{sub 2}{sup +} have been studied most extensively while the other actinides have not. The only PuO{sub 2}{sup +} cation-cation complexes that have been studied are with Fe{sup 3+} and Cr{sup 3+} and neither one has had its equilibrium constant measured. Actinides have small molar absorptivities and cation-cation complexes have small equilibrium constants; therefore, to overcome these obstacles a sensitive technique is required. Spectroscopic techniques are used most often to study cation-cation complexes. Laser-Induced Photacoustic Spectroscopy equilibrium constants for the complexes NpO{sub 2}{sup +}{center_dot}UO{sub 2}{sup 2+}, NpO{sub 2}{sup +}{center_dot}Th{sup 4+}, PuO{sub 2}{sup +}{center_dot}UO{sub 2}{sup 2+}, and PuO{sub 2}{sup +}{center_dot}Th{sup 4+} at an ionic strength of 6 M using LIPAS are 2.4 {plus_minus} 0.2, 1.8 {plus_minus} 0.9, 2.2 {plus_minus} 1.5, and {approx}0.8 M{sup {minus}1}.

Stoyer, N.J. [Lawrence Berkeley Lab., CA (United States); Seaborg, G.T. [Lawrence Livermore National Lab., CA (United States)

1994-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Actinide Thermodynamics at Elevated Temperatures  

SciTech Connect (OSTI)

The postclosure chemical environment in the proposed Yucca Mountain repository is expected to experience elevated temperatures. Predicting migration of actinides is possible if sufficient, reliable thermodynamic data on hydrolysis and complexation are available for these temperatures. Data are scarce and scattered for 25 degrees C, and nonexistent for elevated temperatures. This collaborative project between LBNL and PNNL collects thermodynamic data at elevated temperatures on actinide complexes with inorganic ligands that may be present in Yucca Mountain. The ligands include hydroxide, fluoride, sulfate, phosphate and carbonate. Thermodynamic parameters of complexation, including stability constants, enthalpy, entropy and heat capacity of complexation, are measured with a variety of techniques including solvent extraction, potentiometry, spectrophotometry and calorimetry

Friese, Judah I.; Rao, Linfeng; Xia, Yuanxian; Bachelor, Paula P.; Tian, Guoxin

2007-11-16T23:59:59.000Z

62

Determination of actinides in urine and fecal samples  

DOE Patents [OSTI]

A method of determining the radioactivity of specific actinides that are carried in urine or fecal sample material is disclosed. The samples are ashed in a muffle furnace, dissolved in an acid, and then treated in a series of steps of reduction, oxidation, dissolution, and precipitation, including a unique step of passing a solution through a chloride form anion exchange resin for separation of uranium and plutonium from americium.

McKibbin, Terry T. (Larimer County, CO)

1993-01-01T23:59:59.000Z

63

Determination of actinides in urine and fecal samples  

DOE Patents [OSTI]

A method of determining the radioactivity of specific actinides that are carried in urine or fecal sample material is disclosed. The samples are ashed in a muffle furnace, dissolved in an acid, and then treated in a series of steps of reduction, oxidation, dissolution, and precipitation, including a unique step of passing a solution through a chloride form anion exchange resin for separation of uranium and plutonium from americium.

McKibbin, T.T.

1993-03-02T23:59:59.000Z

64

Optical Spectroscopy Study of Lanthanide Organic Phase Complexes in the TALSPEAK Separations Process  

E-Print Network [OSTI]

Research and Development (FCRD) Program and the NuclearResearch and Development (FCRD) Program, Minor Actinide Separations Sigma Team and in part under the Nuclear

Grimes, Travis S.

2013-01-01T23:59:59.000Z

65

Actinide Organometallic Chemistry  

Science Journals Connector (OSTI)

...Ag Cd 57 72 73 74 75 76 77 78 79 80 La Hf Ta W Re 09 Ir Pt Au Hg 89 104 105 Ac Rf...hydrocarbyl functionalities, the carbon-carbon fusion is found to be intramolecular (43...1 (1968). 15. With the advent of laser techniques for isotope separation, "tailoring...

Tobin J. Marks

1982-09-10T23:59:59.000Z

66

Conference Proceedings International Conference  

E-Print Network [OSTI]

Conference Proceedings 10th International Conference on Hand-Arm Vibration 7-11 June 2004 Flamingo, the entertainment capital of the world: The 10th International Hand-Arm Vibration Conference will be the second time this international conference has been hosted in the US. The first was the 2nd International Hand-Arm Vibration

Hemmers, Oliver

67

Process for recovering actinide values  

DOE Patents [OSTI]

A process for rendering actinide values recoverable from sodium carbonate scrub waste solutions containing these and other values along with organic compounds resulting from the radiolytic and hydrolytic degradation of neutral organophosphorous extractants such as tri-n butyl phosphate (TBP) and dihexyl-N,N-diethyl carbamylmethylene phosphonate (DHDECAMP) which have been used in the reprocessing of irradiated nuclear reactor fuels. The scrub waste solution is preferably made acidic with mineral acid, to form a feed solution which is then contacted with a water-immiscible, highly polar organic extractant which selectively extracts the degradation products from the feed solution. The feed solution can then be processed to recover the actinides for storage or recycled back into the high-level waste process stream. The extractant is recycled after stripping the degradation products with a neutral sodium carbonate solution.

Horwitz, E. Philip (Elmhurst, IL); Mason, George W. (Clarendon Hills, IL)

1980-01-01T23:59:59.000Z

68

Covalent Bonding in Actinide Sandwich Molecules  

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

Covalent Bonding in Actinide Sandwich Molecules Print Glenn Seaborg was one of the first scientists to recognize that differences in the degree of covalent bonding in lanthanide...

69

Aqueous and pyrochemical reprocessing of actinide fuels  

Science Journals Connector (OSTI)

Processing of the nuclear fuel actinides has developed in two independent directions—aqueous processing and pyroprocessing. Similarities in the two processes, their...

L. Mac Toth Ph.D.; Walter D. Bond Ph.D.; Larry R. Avens Ph.D.

1993-02-01T23:59:59.000Z

70

Fuels options conference  

SciTech Connect (OSTI)

The proceedings of the Fuels Options Conference held May 9-10, 1995 in Atlanta, Georgia are presented. Twenty-three papers were presented at the conference that dealt with fuels outlook; unconventional fuels; fuel specification, purchasing, and contracting; and waste fuels applications. A separate abstract was prepared for each paper for inclusion in the Energy Science and Technology Database.

NONE

1995-09-01T23:59:59.000Z

71

Eleventh annual fluidized bed conference  

SciTech Connect (OSTI)

The Proceedings of the Eleventh Annual Fluidized Bed Conference are presented. The Conference was held November 14-15, 1995 in Allentown, Pennsylvania and discussed the following topics: third and fourth generation systems; fuel considerations; and FBC energy and environmntal regulatory issues. A separate abstract was entered into the Energy Science and Technology Database for each of the 19 papers presented at the conference.

NONE

1995-12-31T23:59:59.000Z

72

Conference Program  

E-Print Network [OSTI]

in organizing this year's conference and helping us publishmakes journal. the annual conference possible. Finally, weand Julie Nack Ngue, Conference Co-Chairs and Editors o^

UCLA French and Francophone Studies Graduate Student Association

2006-01-01T23:59:59.000Z

73

2010 International SWAT Conference Proceedings Conference Proceedings  

E-Print Network [OSTI]

2010 International SWAT Conference Proceedings Conference Proceedings #12;#12;Conference ProceedingsConference Proceedings #12;#12;2010 International SWAT Conference Proceedings Contents Conference-490 #12;2010 International SWAT Conference Proceedings 2010 International SWAT Conference Proceedings

74

Pittsburgh Conference  

Science Journals Connector (OSTI)

Pittsburgh Conference ... The 17th Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy will be held Feb. ...

1966-01-24T23:59:59.000Z

75

Princeton Conference  

Science Journals Connector (OSTI)

Princeton Conference ... The Princeton Scientific Community Conference on New Tools and Techniques in Chemical Research will be held Jan. ...

1961-01-09T23:59:59.000Z

76

Proceedings of 2009 NSF Engineering Research and Innovation Conference, Honolulu, Hawaii Grant #0423484 Separation and Energy Use Performance of Material Recycling Systems  

E-Print Network [OSTI]

#0423484 Separation and Energy Use Performance of Material Recycling Systems Timothy Gutowski Malima I Abstract: This paper outlines current research on the performance of recycling processes and systems of recycling processes. Descriptive terminology for separation performance is presented. The goal

Gutowski, Timothy

77

Experimental studies of actinides in molten salts  

SciTech Connect (OSTI)

This review stresses techniques used in studies of molten salts containing multigram amounts of actinides exhibiting intense alpha activity but little or no penetrating gamma radiation. The preponderance of studies have used halides because oxygen-containing actinide compounds (other than oxides) are generally unstable at high temperatures. Topics discussed here include special enclosures, materials problems, preparation and purification of actinide elements and compounds, and measurements of various properties of the molten volts. Property measurements discussed are phase relationships, vapor pressure, density, viscosity, absorption spectra, electromotive force, and conductance. 188 refs., 17 figs., 6 tabs.

Reavis, J.G.

1985-06-01T23:59:59.000Z

78

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network [OSTI]

Oxford ; New York ; Oxford University Press. Fuel- Trac,Spent Fuel / Reprocessing, in Nuclear Industry Statusto Burn Non-Fissile Fuels. 2008. GA. Energy Multiplier

Heidet, Florent

2010-01-01T23:59:59.000Z

79

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network [OSTI]

As the heavy metal density of carbide fuel is 6% smallera heavy metal density close to that of the carbide fuel butcarbide fuel or inert matrix dispersion fuel due to the lowered heavy metal

Heidet, Florent

2010-01-01T23:59:59.000Z

80

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network [OSTI]

1996. 12 p. Toshinsky, G.I. , LMFBR Operation in the Nuclearand characterization of LMFBR carbide and nitride fuels andcores with oxide fuel, “LMFBR recycle Pu/U”, are used.

Heidet, Florent

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network [OSTI]

Potential Uses for Depleted Uranium Oxide. 2009, DOE. p.15. WNA. Uranium and Depleted Uranium. 2009 [cited 2010R. , Direct Use of Depleted Uranium As Fuel in a Traveling-

Heidet, Florent

2010-01-01T23:59:59.000Z

82

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network [OSTI]

Physics Optimization of Breed and Burn Fast Reactor Systems.reactors: Fabrication and properties and their optimization.

Heidet, Florent

2010-01-01T23:59:59.000Z

83

Maximum Fuel Utilization in Advanced Fast Reactors without Actinides Separation  

E-Print Network [OSTI]

According to the DOE handbook [57], a shutdown margin largerp. 812. Not, A. , DOE fundamentals handbook: Nuclear physics

Heidet, Florent

2010-01-01T23:59:59.000Z

84

PF-4 actinide disposition strategy  

SciTech Connect (OSTI)

The dwindling amount of Security Category I processing and storage space across the DOE Complex has driven the need for more effective storage of nuclear materials at LANL's Plutonium Facility's (PF-4's) vault. An effort was begun in 2009 to create a strategy, a roadmap, to identify all accountable nuclear material and determine their disposition paths, the PF-4 Actinide Disposition Strategy (PADS). Approximately seventy bins of nuclear materials with similar characteristics - in terms of isotope, chemical form, impurities, disposition location, etc. - were established in a database. The ultimate disposition paths include the material to remain at LANL, disposition to other DOE sites, and disposition to waste. If all the actions described in the document were taken, over half of the containers currently in the PF-4 vault would been eliminated. The actual amount of projected vault space will depend on budget and competing mission requirements, however, clearly a significant portion of the current LANL inventory can be either dispositioned or consolidated.

Marcevicius, Robert W [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

85

Joint Actinide Shock Physics Experimental Research - JASPER  

ScienceCinema (OSTI)

Commonly known as JASPER the Joint Actinide Shock Physics Experimental Research facility is a two stage light gas gun used to study the behavior of plutonium and other materials under high pressures, temperatures, and strain rates.

None

2015-01-09T23:59:59.000Z

86

Joint Actinide Shock Physics Experimental Research - JASPER  

SciTech Connect (OSTI)

Commonly known as JASPER the Joint Actinide Shock Physics Experimental Research facility is a two stage light gas gun used to study the behavior of plutonium and other materials under high pressures, temperatures, and strain rates.

None

2014-10-31T23:59:59.000Z

87

Chapter 13 - Actinide host phases as radioactive waste forms  

Science Journals Connector (OSTI)

Publisher Summary An effective strategy for dealing with high-level waste is to partition the short-lived fission product elements from the long-lived actinides, creating separate waste streams. Once there are two waste streams, the properties and durability of the waste form can be designed to a level appropriate to the toxicity and time required for isolation from the environment. With such a strategy the fission product elements may be incorporated into a borosilicate glass and the actinides into more durable crystalline ceramics. Although special glass compositions may be developed for actinide incorporation, their long-term durability is less easily assured, particularly on the time scales required for actinide immobilization and confinement. The final selection of any waste form should depend on its ability to incorporate the radionuclides of interest, its chemical durability, response to a radiation-field, and physical properties as well as the time required for isolation to protect the environment. There are three significant types of actinide-containing materials generated by the nuclear fuel cycle that contain high levels of radioactivity: 1.) spent nuclear fuel (SNF) related to the production of fissile material for weapons, 2.) SNF from commercial nuclear reactors, 3.) liquid high-level waste (HLW) derived during the reprocessing of SNF [1]. Unreacted fuel constituents (235,238U) make up approximately 96% of total mass of SNF. A major fraction of activity of SNF comes from fission product (FP) elements with mass numbers from 85 to 106 and from 125–147 (Kr, Sr, Y, Zr, Tc, Ru, Y, Sb, Cs, Ba, Ce, Pm, etc.), unreacted fuel (U), “minor” actinides (Np, Pu, Am, Cm), and activated products (H, C, Al, Na, Mn, Fe, Co). \\{FPs\\} consist of about 200 isotopes of approximately 40 elements from Zn to Gd. The yield of individual radionuclides ranges between 104 % to several percent (a yield of 1 % corresponds to production of 1 atom of daughter isotope per 100 events of nuclear decay of 235U or 239Pu). The fraction of individual radionuclides in SNF varies depending on the type of reactor, burn-up and cooling time. From point of view of radiobiological risk the following groups of radionuclides are important:u• Short-lived \\{FPs\\} which are almost completely decayed to stable isotopes after a cooling of SNF for some tens of years: Rb, Y, Mo, Ru, Rh, Ag, Sb, Te, Xe, Ba, La, Ce, Pr, Nd, Pm. Their amount in total is 26 kg per metric tone (MT) of SNF or 65 wt.% of the total \\{FPs\\} amount; • \\{FPs\\} with high specific activity: mainly 90Sr and 137Cs; their total content is up to 6 kg per 1 MT of SNF (about 15 wt.% of total FPs); • Long-lived \\{FPs\\} with low specific activity: Zr, Tc, Pd, Sn, I (about 8 kg per 1 MT of SNF or about 20 wt.% of total FPs); • Actinides (Np, Pu, Am, Cm) and their daughter products which are less than 1 wt.% and dominated by Pu; • Unreacted constituents: 238U - 98.9 wt.% and 235U -1.1 wt.% of total.

Sergey V. Yudintsev; Sergey V. Stefanovsky; Rodney C. Ewing

2007-01-01T23:59:59.000Z

88

CONFERENCE ANNOUNCEMENTS:  

Science Journals Connector (OSTI)

......oxfordjournals.org March 2010 research-article Conference Announcements Conference Announcements The American Nuclear Society's...promises to be one of the most exciting technical conferences in the field of radiation protection and shielding......

Conference Announcements

2010-03-01T23:59:59.000Z

89

CONFERENCE NOTICE:  

Science Journals Connector (OSTI)

......Computer Society August 1962 meeting-report Conference Notice British Computer Society Conference, Cardiff4th to 7th September 1962 The final detailed time-table for the third conference of The British Computer Society has now......

British Computer Society Conference; Cardiff: 4th to 7th September 1962

1962-08-01T23:59:59.000Z

90

Carbon Conference  

Science Journals Connector (OSTI)

Carbon Conference ... The Fourth Hienninl Conference on Carbon will be held at the University of Buffalo, June 15 to 19. ... The Pittsburgh Section's coal technology group will meet in the conference room at Mellon Institute, Pittsburgh, June ... ...

1959-06-01T23:59:59.000Z

91

Conference reports  

Science Journals Connector (OSTI)

...Copyright 1998 Article Conference reports Various Conferences Abduction and Induction in AI: Report of the IJCAI'97...ca/spider/poole/talks/ind-ab.pdf 651 652 Conferences tried to tie together logic and probabilistic approaches......

Various

1998-07-01T23:59:59.000Z

92

Actinide determination and analytical support for characterization of environmental samples  

SciTech Connect (OSTI)

Clean chemical and Thermal Ionization Mass Spectrometry (TIMS) procedures have been developed to permit the determination of environmental actinide element concentrations and isotopic signatures. The isotopic signatures help identify element origin and separate naturally occurring or background contributions from local anthropogenic sources. Typical sample sizes for processing are 2 liters of water, 1--10 grams of sediment, and 1--20 grams of soil. Measurement limits for Pu, Am, and Np are < 1 {times} 18{sup 8} atoms, and for U are < 2.5 {times} 10{sup 12} atoms. For isotopic signatures, < 5 {times} 10{sup 8} atoms of Pu, Am, and Np are necessary, and 8 {times} 10{sup 12} atoms of U are required. Of potential interest to the IAEA is the incorporation of these techniques into their Safeguards Analytical Laboratory for environmental sampling. Studies made of surface waters, sediments and soils from the Rocky Flats Plant (RFP) in Colorado, US, are used as examples of this methodology. These studies showed that, although plant boundary actinide concentrations approached, on the downstream side, natural or background levels, isotopic signatures characteristic of plant operations were still discernible.

Rokop, D.J.; Efurd, D.W.; Perrin, R.E.

1994-03-01T23:59:59.000Z

93

Ultratrace analysis of transuranic actinides by laser-induced fluorescence  

DOE Patents [OSTI]

Ultratrace quantities of transuranic actinides are detected indirectly by their effect on the fluorescent emissions of a preselected fluorescent species. Transuranic actinides in a sample are coprecipitated with a host lattice material containing at least one preselected fluorescent species. The actinide either quenches or enhances the laser-induced fluorescence of the preselected fluorescent species. The degree of enhancement or quenching is quantitatively related to the concentration of actinide in the sample.

Miller, S.M.

1983-10-31T23:59:59.000Z

94

Measurement of actinides in environmental samples by Photo-Electron Rejecting Alpha Liquid Scintillation  

SciTech Connect (OSTI)

This work describes the adaptation of extractive scintillation with a Photo-Electron Rejecting Alpha Liquid Scintillation (PERALS) (ORDELA, Inc.) spectrometer to the analysis of actinides in environmental samples from the Savannah River Site (SRS). Environmental quality assurance standards and actual water samples were treated by one of two methods; either a two step direct extraction, or for more complex samples, pretreatment by an extraction chromatographic separation prior to measurement of the alpha activity by PERALS.

Cadieux, J.R. [Westinghouse Savannah River Co., Aiken, SC (United States); Clark, S. [Savannah River Ecology Lab., Univ. of Georgia (United States); Fjeld, R.A.; Reboul, S.; Sowder, A. [Clemson Univ., SC (United States). Dept. of Environmental Systems Engineering

1994-05-01T23:59:59.000Z

95

Preparation of actinide boride materials via solid-state metathesis reactions and actinide dicarbollide precursors  

Science Journals Connector (OSTI)

Information gaps exist in the knowledge base needed for choosing among the alternate processes to be used in the safe conversion of fissile materials to optimal forms for safe interim storage long-term storage and ultimate disposition. The current baseline storage technology for various wastes uses borosilicate glasses. 1 The focus of this paper is the synthesis of actinide-containing ceramic materials at low and moderate temperatures (200?°C–1000?°C) using molecular and polymeric actinide borane and carborane complexes.

Anthony J. Lupinetti; Julie Fife; Eduardo Garcia; Kent D. Abney

2000-01-01T23:59:59.000Z

96

RAPID DETERMINATION OF ACTINIDES IN URINE BY INDUCTIVELY-COUPLED PLASMA MASS SPECTROMETRY AND ALPHA SPECTROMETRY: A HYBRID APPROACH  

SciTech Connect (OSTI)

A new rapid separation method that allows separation and preconcentration of actinides in urine samples was developed for the measurement of longer lived actinides by inductively coupled plasma mass spectrometry (ICP-MS) and short-lived actinides by alpha spectrometry; a hybrid approach. This method uses stacked extraction chromatography cartridges and vacuum box technology to facilitate rapid separations. Preconcentration, if required, is performed using a streamlined calcium phosphate precipitation. Similar technology has been applied to separate actinides prior to measurement by alpha spectrometry, but this new method has been developed with elution reagents now compatible with ICP-MS as well. Purified solutions are split between ICP-MS and alpha spectrometry so that long- and short-lived actinide isotopes can be measured successfully. The method allows for simultaneous extraction of 24 samples (including QC samples) in less than 3 h. Simultaneous sample preparation can offer significant time savings over sequential sample preparation. For example, sequential sample preparation of 24 samples taking just 15 min each requires 6 h to complete. The simplicity and speed of this new method makes it attractive for radiological emergency response. If preconcentration is applied, the method is applicable to larger sample aliquots for occupational exposures as well. The chemical recoveries are typically greater than 90%, in contrast to other reported methods using flow injection separation techniques for urine samples where plutonium yields were 70-80%. This method allows measurement of both long-lived and short-lived actinide isotopes. 239Pu, 242Pu, 237Np, 243Am, 234U, 235U and 238U were measured by ICP-MS, while 236Pu, 238Pu, 239Pu, 241Am, 243Am and 244Cm were measured by alpha spectrometry. The method can also be adapted so that the separation of uranium isotopes for assay is not required, if uranium assay by direct dilution of the urine sample is preferred instead. Multiple vacuum box locations may be set-up to supply several ICP-MS units with purified sample fractions such that a high sample throughput may be achieved, while still allowing for rapid measurement of short-lived actinides by alpha spectrometry.

Maxwell, S.; Jones, V.

2009-05-27T23:59:59.000Z

97

CONFERENCE ROOMS CONFERENCE ROOMS FOR RESERVATION  

E-Print Network [OSTI]

CONFERENCE M0700 BASEMENT CONFERENCE ROOMS CONFERENCE M0720 HRCMEB CONFERENCE M0390 CONFERENCE ROOMS FOR RESERVATION INFORMAL MEETING SPACE TBRC CLASSROOM SPACE #12;CONFERENCE H1210 CONFERENCE H1320 HRC MEB INFORMAL MEETING SPACE CONFERENCE ROOMS FOR RESERVATION TBRC LOUNGE C1068 LOUNGE C1050 LOUNGE

98

Molecular dynamics simulation and topological analysis of the network structure of actinide-bearing materials  

E-Print Network [OSTI]

Actinide waste production and storage is a complex problem, and a whole-cycle approach to actinide management is necessary to minimize the total volume of waste. In this dissertation, I examine three actinide-bearing ...

Dewan, Leslie

2013-01-01T23:59:59.000Z

99

Actinide burning in the integral fast reactor  

SciTech Connect (OSTI)

During the past few years, Argonne National Laboratory has been developing the integral fast reactor (IFR), an advanced liquid-metal reactor concept. In the IFR, the inherent properties of liquid-metal cooling are combined with a new metallic fuel and a radically different refining process to allow breakthroughs in passive safety, fuel cycle economics, and waste management. A key feature of the IFR concept is its unique pyroprocessing. Pyroprocessing has the potential to radically improve long-term waste management strategies by exploiting the following attributes: 1. Minor actinides accompany plutonium product stream; therefore, actinide recycling occurs naturally. Actinides, the primary source of long-term radiological toxicity, are removed from the waste stream and returned to the reactor for in situ burning, generating useful energy. 2. High-level waste volume from pyroprocessing call be reduced substantially as compared with direct disposal of spent fuel. 3. Decay heat loading in the repository can be reduced by a large factor, especially for the long-term burden. 4. Low-level waste generation is minimal. 5. Troublesome fission products, such as [sup 99]Tc, [sup 129]I, and [sup 14]C, are contained and immobilized. Singly or in combination, the foregoing attributes provide important improvements in long-term waste management in terms of the ease in meeting technical performance requirements (perhaps even the feasibility of demonstrating that technical performance requirements can be met) and perhaps also in ultimate public acceptance. Actinide recycling, if successfully developed, could well help the current repository program by providing an opportunity to enhance capacity utilization and by deferring the need for future repositories. It also represents a viable technical backup option in the event unforeseen difficulties arise in the repository licensing process.

Chang, Y.I. (Argonne National Lab., IL (United States))

1993-01-01T23:59:59.000Z

100

Actinide recycle potential in the integral fast reactor  

SciTech Connect (OSTI)

The Integral Fast Reactor (IFR) fuel cycle holds promise for substantial improvements in economics, diversion-resistance, and waste management. In the IFR pyroprocessing, minor actinides accompany plutonium product stream, and therefore, actinide recycle occurs naturally. The fast neutron spectrum of the IFR makes it an ideal actinide burner, as well. This paper discusses technical features of the IFR fuel cycle, its technical progress, the development status, and potential implications on long-term waste management.

Chang, Y.I. [Argonne National Laboratory, IL (United States)

1993-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Actinide Ion Sensor For Pyroprocess Monitoring - Energy Innovation...  

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

created a novel method and apparatus for monitoring plutonium concentration during pyroprocessing to ensure that the refining process is efficient at collecting actinides. Unlike...

102

E-Print Network 3.0 - actinide metal complexes Sample Search...  

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

metal actinide complex halides: thermochemical and structural Summary: on the thermodynamics of the actinide halogeno-complexes with alkali metal ions is reviewed, with...

103

E-Print Network 3.0 - actinide halide complexes Sample Search...  

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

It has been observed that complexes of lanthanide, actinide, and transition metal activate... that these actinide alkyl complexes undergo interesting C-H and C-N bond...

104

E-Print Network 3.0 - actinide mixed oxide Sample Search Results  

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

Fuels Mikael JOLKKONEN1;;y Summary: . Examples of such substances are molten actinide carbides and the gaseous forms of many metal oxides... , minor actinides, uranium-free nitride...

105

E-Print Network 3.0 - actinide complexation kinetics Sample Search...  

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

It has been observed that complexes of lanthanide, actinide, and transition metal activate... that these actinide alkyl complexes undergo interesting C-H and C-N bond...

106

QUANTIFICATION OF ACTINIDE ALPHA-RADIATION DAMAGE IN MINERALS AND CERAMICS  

SciTech Connect (OSTI)

There are large amounts of heavy alpha-emitters in nuclear waste and nuclear materials inventories stored in various sites around the world. These include plutonium and minor actinides such as americium and curium. In preparation for geological disposal there is a consensus that actinides that have been separated from spent nuclear fuel should be immobilised within mineral-based ceramics rather than glass. Over the long-term, the alpha-decay taking place in these ceramics will severely disrupt their crystalline structure and reduce their durability. A fundamental property in predicting cumulative radiation damage is the number of atoms permanently displaced per alpha–decay. Currently, this number is estimated as 1000-2000 atoms/alpha decay event. Here, we report nuclear magnetic resonance, spin-counting experiments that measure close to 5000 atoms/alpha decay event in radiation damaged natural zircons. New radiological NMR measurements on highly radioactive, 239Pu zircon show damage similar to that created by 238U and 232Th in mineral zircons at the same dose, indicating no significant effect of dose rate. Based on these measurements, the initially crystalline structure of a 10 wt% 239Pu zircon would be amorphous after only 1400 years in a geological repository. These measurements establish a basis for assessing the long-term structural durability of actinide-containing ceramics based on an atomistic understanding of the fundamental damage event.

Farnan, Ian E.; Cho, Herman M.; Weber, William J.

2007-01-11T23:59:59.000Z

107

Determination of long-lived actinides in soil leachates by inductively coupled plasma: Mass spectrometry  

SciTech Connect (OSTI)

Inductively coupled plasma -- mass spectrometry (ICP-MS) was used to concurrently determine multiple long-lived (t{sub 1/2} > 10{sup 4} y) actinide isotopes in soil samples. Ultrasonic nebulization was found to maximize instrument sensitivity. Instrument detection limits for actinides in solution ranged from 50 mBq L{sup {minus}1} ({sup 239}Pu) to 2 {mu}Bq L{sup {minus}1} ({sup 235}U) Hydride adducts of {sup 232}Th and {sup 238}U interfered with the determinations of {sup 233}U and {sup 239} Pu; thus, extraction chromatography was, used to eliminate the sample matrix, concentrate the analytes, and separate uranium from the other actinides. Alpha spectrometric determinations of {sup 230}Th, {sup 239}Pu, and the {sup 234}U/{sup 238}U activity ratio in soil leachates compared well with ICP-MS determinations; however, there were some small systematic differences (ca. 10%) between ICP-MS and a-spectrometric determinations of {sup 234}U and {sup 238}U activities.

Crain, J.S.; Smith, L.L.; Yaeger, J.S.; Alvarado, J.A.

1994-06-01T23:59:59.000Z

108

POTENTIAL BENCHMARKS FOR ACTINIDE PRODUCTION IN HANFORD REACTORS  

SciTech Connect (OSTI)

A significant experimental program was conducted in the early Hanford reactors to understand the reactor production of actinides. These experiments were conducted with sufficient rigor, in some cases, to provide useful information that can be utilized today in development of benchmark experiments that may be used for the validation of present computer codes for the production of these actinides in low enriched uranium fuel.

PUIGH RJ; TOFFER H

2011-10-19T23:59:59.000Z

109

Pittsburgh Conference  

Science Journals Connector (OSTI)

Pittsburgh Conference ... The 14th Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, sponsored by the ACS Pittsburgh Section's Analytical Chemistry Group and the Spectroscopy Society of Pittsburgh, will be held at the Penn-Sheraton Hotel in Pittsburgh, March 4 to 8, 1963. ... Correspondence on papers should go (in duplicate) to Dr. W. A. Straub, Program Chairman, Pittsburgh Conference, Applied Research Laboratory, U.S. Steel Corp., Monroeville, Pa. ...

1962-07-16T23:59:59.000Z

110

information Conference  

Science Journals Connector (OSTI)

information Conference ... The 1958 International Conference on Scientific Information will be held in Washington, D. C, in November 1958. ... Since papers that are accepted must be printed and circulated to the participants not later than July 1958, it is urged that anyone interested in submitting a paper write to the secretariat immediately, at International Conference of Scientific Information, National Academy of Sciences, 2101 Constitution Ave., Washington 25, D. C. ...

1957-12-09T23:59:59.000Z

111

Conference Waiver  

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

Conference Waiver 2013 Meeting of the Department of Energy (DOE) Energy Emergency Management Issues Special Interest Group May 6-10, 2013 -Chicago, Illinois Compelling Purpose and...

112

Spam Conferences  

E-Print Network [OSTI]

2014 International Conference on Advanced Information Technology and Application(ICAITA2014) December 25-26, 2014 Hong Kong, came from Suzy ...

113

CATEE Conference  

Broader source: Energy.gov [DOE]

The Clean Air Through Energy Efficiency (CATEE) Conference is coming to North Texas on Nov. 18-20, 2014, at the Sheraton Dallas Hotel.

114

Actinide-Aluminate Speciation in Alkaline Radioactive Waste  

SciTech Connect (OSTI)

Investigation of behavior of actinides in alkaline media containing AL(III) showed that no aluminate complexes of actinides in oxidation states (IIII-VIII) were formed in alkaline solutions. At alkaline precipitation IPH (10-14) of actinides in presence of AL(III) formation of aluminate compounds is not observed. However, in precipitates contained actinides (IIV)<(VI), and to a lesser degree actinides (III), some interference of components takes place that is reflected in change of solid phase properties in comparison with pure components or their mechanical mixture. The interference decreases with rise of precipitation PH and at PH 14 is exhibited very feebly. In the case of NP(VII) the individual compound with AL(III) is obtained, however it is not aluminate of neptunium(VII), but neptunate of aluminium(III) similar to neptunates of other metals obtained earlier.

Dr. David L. Clark; Dr. Alexander M. Fedosseev

2001-12-21T23:59:59.000Z

115

Conference Information: AlumniConferenceCommittee  

E-Print Network [OSTI]

Conference Information: AlumniConferenceCommittee: TonyCoviello,SummitEngineering- Conference Chair RachelBeaudry-UNHStudent Conference Chair ErinBell-UNHCivilEngineering DepartmentChair CharlesHead,SanbornHead-Past Conference Chair MichelleMancini-UNHCivilEngineering Department,ConferenceAdministrator Duncan

Pringle, James "Jamie"

116

Pittsburgh Conference  

Science Journals Connector (OSTI)

Pittsburgh Conference ... The 11th Annual Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy will be held at the Penn-Sheraton Hotel in Pittsburgh, Feb. 29 to March 4. Sponsors are the Analytical Chemistry Group of the ACS Pittsburgh Section and the Spectroscopy Society of Pittsburgh. ...

1960-02-01T23:59:59.000Z

117

EIA - 2008 Conference Presentation Videos  

U.S. Energy Information Administration (EIA) Indexed Site

Presentations & Conferences > Conferences > EIA 2008 Energy Conference > EIA 2008 Energy Conference Videos EIA Documentary - produced for 2008 EIA Conference Content on this page...

118

EJ Conference  

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

EJ Conference, Inc. EJ Conference, Inc. Presents DOUBLETREE HOTEL CRYSTAL CITY 300 ARMY NAVY DRIVE ARLINGTON, VA 22202 MAY 27-29, 2009 Meet the Agencies and Exhibit Registration Form One of the recommendations from the 2008 State of Environmental Justice in America Conference was the introduction of an activity through which participants would have an opportunity to engage in short-but-informative conversations with representatives of various Federal agencies It was noted that the conference is one of few for many local community participants to obtain an audience with high- level Federal officials. Since one of the stated purposes of the conference is to bring together diverse groups of individuals interested in environmental justice through a process of substantive and honest

119

Tenth international conference on liquefied natural gas  

SciTech Connect (OSTI)

Separate abstracts were prepared for the 73 individual papers presented. The conference was divided into four sessions: (1) LNG Market, (2) Liquefaction plants, (3) LNG receiving terminals and storage, and (4) LNG transportation, handling, safety and environmental issues.

Not Available

1992-01-01T23:59:59.000Z

120

Third technical contractors' conference on peat  

SciTech Connect (OSTI)

The conference dealt with the estimation of US peat reserves, methods for the gasification of peat, including biogasification, techniques for dewatering peat, and the harvesting of peat. Separate abstracts were prepared for the individual papers. (CKK)

Not Available

1981-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Ultracapacitor separator  

DOE Patents [OSTI]

An ultracapacitor includes two solid, nonporous current collectors, two porous electrodes separating the collectors, a porous separator between the electrodes and an electrolyte occupying the pores in the electrodes and separator. The electrolyte is a polar aprotic organic solvent and a salt. The porous separator comprises a wet laid cellulosic material.

Wei, Chang (Niskayuna, NY); Jerabek, Elihu Calvin (Glenmont, NY); LeBlanc, Jr., Oliver Harris (Schenectady, NY)

2001-03-06T23:59:59.000Z

122

Proliferation Resistance Evaluation of ACR-1000 Fuel with Minor Actinides  

SciTech Connect (OSTI)

The Global Nuclear Energy Partnership (GNEP) program is to significantly advance the science and technology of nuclear energy systems and to enhance the spent fuel proliferation resistance. It consists of both innovative nuclear reactors and innovative research in separation and transmutation. The merits of nuclear energy are high-density energy, with low environmental impacts (i.e. almost zero greenhouse gas emission). Planned efforts involve near-term and intermediate-term improvements in fuel utilization and recycling in current light water reactors (LWRs) as well as the longer-term development of new nuclear energy systems that offer much improved fuel utilization and proliferation resistance, along with continued advances in operational safety. For future advanced nuclear systems, minor actinides (MA) are viewed more as a resource to be recycled, and transmuted to less hazardous and possibly more useful forms, rather than simply disposed of as a waste stream in an expensive repository facility. MAs can play a much larger part in the design of advanced systems and fuel cycles, not only as additional sources of useful energy, but also as direct contributors to the reactivity control of the systems into which they are incorporated. In this work, an Advanced CANDU Reactor (ACR) fuel unit lattice cell model with 43 UO2 fuel rods will be used to investigate the effectiveness of a Minor Actinide Reduction Approach (MARA) for enhancing proliferation resistance and improving the fuel cycle performance. The main MARA objective is to increase the 238Pu / Pu isotope ratio by using the transuranic nuclides (237Np and 241Am) in the high burnup fuel and thereby increase the proliferation resistance even for a very low fuel burnup. As a result, MARA is a very effective approach to enhance the proliferation resistance for the on power refueling ACR system nuclear fuel. The MA transmutation characteristics at different MA loadings were compared and their impact on neutronics criticality assessed. The concept of MARA, significantly increases the 238Pu/Pu ratio for proliferation resistance, as well as serves as a burnable absorber to hold-down the initial excess reactivity. It is believed that MARA can play an important role in atoms for peace and the intermediate term of nuclear energy reconnaissance

Gray S. Chang

2008-09-01T23:59:59.000Z

123

Separation of strontium from fecal matter  

DOE Patents [OSTI]

A method is presented of separating strontium from a sample of biomass potentially contaminated with various radionuclides. After the sample is reduced, dissociated, and carried on a first precipitate of actinides, the first precipitate is removed to leave a supernate. Next, oxalic acid is added to the supernate to cause a second precipitate of strontium and calcium. Then, after separating the second precipitate, nitric acid is added to the second precipitate to cause a third precipitate of strontium. The calcium remains in solution and is discarded to leave essentially the precipitate of strontium.

Kester, D.K.

1995-01-03T23:59:59.000Z

124

Separation of strontium from fecal matter  

DOE Patents [OSTI]

A method of separating strontium from a sample of biomass potentially contaminated with various radionuclides. After the sample is reduced, dissociated, and carried on a first precipitate of actinides, the first precipitate is removed to leave a supernate. Next, oxalic acid is added to the supernate to cause a second precipitate of strontium and calcium. Then, after separating the second precipitate, nitric acid is added to the second precipitate to cause a third precipitate of strontium. The calcium remains in solution and is discarded to leave essentially the precipitate of strontium.

Kester, Dianne K. (Idaho Falls, ID)

1995-01-01T23:59:59.000Z

125

Joint Actinide Shock Physics Experimental Research | National Nuclear  

National Nuclear Security Administration (NNSA)

Actinide Shock Physics Experimental Research | National Nuclear Actinide Shock Physics Experimental Research | 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 Jasper Joint Actinide Shock Physics Experimental Research Home > About Us > Our Programs > Defense Programs > Office of Research, Development, Test, and Evaluation > Office of Research and Development >

126

Conferences | Department of Energy  

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

Meetings Conferences Conferences Launched in 2008, the annual Biomass Conference brings together hundreds of diverse stakeholders, decision makers in the public and private...

127

XRM2005 Conference Summary  

E-Print Network [OSTI]

some of the other organizers. (from the Conference web site)XRM 2005 – Conference Summary Janos Kirz Advanced LightThe presentations at the Conference covered the latest

Kirz, Janos

2005-01-01T23:59:59.000Z

128

Vehicle Technologies Office: Conferences  

Broader source: Energy.gov [DOE]

The Vehicle Technologies Office supports and sponsors conferences related to the Office's goals and objectives. When such conferences are planned and conference information becomes available, it...

129

Development of Pillared M(IV) Phosphate Phosphonate Inorganic Organic Hybrid Ion Exchange Materials for Applications in Separations found in the Nuclear Fuel Cycle  

E-Print Network [OSTI]

This dissertation focuses on key intergroup and intragroup separations found in the back end of the nuclear fuel cycle, specifically americium from lanthanides and americium from other actinides, most importantly americium from curium. Our goal...

Burns, Jonathan

2012-10-02T23:59:59.000Z

130

Pavement Conference ............3 Conference opener..................4  

E-Print Network [OSTI]

· Pavement Conference ............3 · Conference opener..................4 · Conference luncheon Transportation Research Conference. The event returns to its usual location at the Saint Paul RiverCentre April will post live Twitter updates during the conference. To follow CTS on Twitter, see http

Minnesota, University of

131

Minor Actinide Transmutation Potential of Modified PROMETHEUS Fusion Reactor  

Science Journals Connector (OSTI)

This study presents the investigation of the burning and/or transmutation (B/T) of minor actinides (MAs) in the modified PROMETHEUS-H fusion reactor. The calculations were performed for an operation...2.... In or...

Hüseyin Yap??c??; Gamze Genç; Nesrin Demir; Bilge Çeper

2004-06-01T23:59:59.000Z

132

Neptunium separations  

SciTech Connect (OSTI)

Two procedures for the separation of Np are presented; the first involves separation of /sup 239/Np from irradiated /sup 238/U, and the second involves separation of /sup 237/Np from a solution representing that from a dissolved fuel element.

Wild, J.F.

1983-05-09T23:59:59.000Z

133

Notes for Berkeley Conference  

E-Print Network [OSTI]

17 Notes for Berkeley Conference Harry de Gorter InstituteNotes for Berkeley Conference Comparing the Political

de Gorter, Harry

2005-01-01T23:59:59.000Z

134

ARM - Conference Documents  

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

govPublicationsConference Documents Publications Journal Articles Conference Documents Program Documents Technical Reports Publications Database Public Information Materials Image...

135

SRI2007 Conference - Schedule  

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

Home Registration Abstract Submission Proceedings Manuscript Review Conference Schedule Poster Session Satellite Workshops Conference Committee Accommodations Vendors Travel tips...

136

EJ Conference  

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

Howard University School of Law (Washington, DC) on May 27, 2009 Howard University School of Law (Washington, DC) on May 27, 2009 Crystal City Doubletree Hotel (300 Army Navy Drive, Arlington, VA 22202) on May 28 and 29, 2009 Meet the Agencies Request for Appointment One of the recommendations from the 2008 State of Environmental Justice in America Conference was the introduction of an activity through which participants would have an opportunity to engage in short-but-informative conversations with representatives of various Federal agencies. It was noted that the conference is one of few occasions for many local community participants to obtain an audience with high-level Federal officials. Since one of the stated purposes of the conference is to bring together diverse groups of individuals interested in

137

Conference Center | Savannah River Ecology Laboratory  

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

Conference Center front view UGA-SREL Conference Center large conference room Large conference room small conference room Small conference room The Savannah River Ecology...

138

RADIOCHEMICAL STUDIES OF NEUTRON DEFICIENT ACTINIDE ISOTOPES  

E-Print Network [OSTI]

Column Chromatography 2. Americium and Curium t IV. COUNTINGberkellum, curium, and americium compared with theirfor the separation of curium and americium (trans- plutonium

Williams, Kimberly Eve

2011-01-01T23:59:59.000Z

139

Tenth annual fluidized bed conference  

SciTech Connect (OSTI)

The proceedings of the Tenth Annual Fluidized Bed Conference is presented. The Conference was held November 14-15, 1994 in Jacksonville, FL and covered such topics as: opportunity fuels, the fluid bed market, bubbling fluid bed retrofitting, waste fuel-based circulating fluidized-bed project, construction permits for major air pollution sources, fluidized bed residues, uses for fluidized bed combustion ash, ash pelletization, sorbents for FBC applications, refractory maintenance, and petroleum coke. A separate abstract and indexing have been prepared for each paper for inclusion in the Energy Science and Technology Database.

NONE

1994-12-31T23:59:59.000Z

140

E-Print Network 3.0 - actinide chemistry Sample Search Results  

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

Powered by Explorit Topic List Advanced Search Sample search results for: actinide chemistry Page: << < 1 2 3 4 5 > >> 1 www.emsl.pnl.gov ACTINIDE CHEMISTRY MEETS COMPUTATION...

Note: This page contains sample records for the topic "actinide separations conference" 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.


141

E-Print Network 3.0 - actinide complexes Sample Search Results  

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

(04-400) Summary: of the electronic properties and reactions of actinide and transition metal complexes. Hay, who is a Laboratory... as a leader in actinide chemistry, Burns was...

142

E-Print Network 3.0 - actinide complexing agent Sample Search...  

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

(04-400) Summary: of the electronic properties and reactions of actinide and transition metal complexes. Hay, who is a Laboratory... as a leader in actinide chemistry, Burns was...

143

Conference Talks  

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

Conference Talks 1-2 Michael Borland 1-4 Weiming Guo 2-2 Robert Rossmanith 3-3 Gwyn Williams 4-1 Robert Austin 5-2 James Ablett 5-5 Peter Revesz 8-1 Peter Siddons 9-4 Ying Zhu 10-1...

144

Conference Management  

Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

To establish requirements and responsibilities with respect to managing conferences sponsored by the Department of Energy (DOE) or by DOE management and operating contractors and other contractors who perform work at DOE-owned or -leased facilities, including management and integration contractors and environmental restoration management contractors (when using funds that will be reimbursed by DOE). Cancels DOE N 110.3.

1999-11-03T23:59:59.000Z

145

Eighth national passive solar conference. Final report  

SciTech Connect (OSTI)

The Eighth National Passive Solar Conference was held near Santa Fe, New Mexico at the Glorieta Conference Center on September 5 to 11, 1983. Nearly 900 people from all across the nation and the world attended the conference. Close to 200 technical papers were presented, 50 solar product exhibits were available; 34 poster sessions were presented; 16 solar workshops were conducted; 10 renowned solar individuals participated in rendezvous sessions; 7 major addresses were delivered; 5 solar home tours were conducted; 2 emerging architecture sessions were held which included 21 separate presentations; and commercial product presentations were given for the first time ever at a national passive solar conference. Peter van Dresser of Santa Fe received the prestigious Passive Solar Pioneer Award, posthumously, from the American Solar Energy Society and Benjamin T. Buck Rogers of Embudo received the prestigious Peter van Dresser Award from the New Mexico Solar Energy Association. This report reviews conference organization, attendance, finances, conference evaluation form results, and includes press coverage samples, selected conference photos courtesy of Marshall Tyler, and a summary with recommendations for future conferences. The Appendices included conference press releases and a report by the New Mexico Solar Industry Development Corporation on exhibits management.

Owen, A.; Zee, R.

1983-12-01T23:59:59.000Z

146

Minor Actinide Transmutation Physics for Low Conversion Ratio Sodium Fast Reactors  

SciTech Connect (OSTI)

The effects of varying the reprocessing strategy used in the closed cycle of a Sodium Fast Reactor (SNF) prototype are presented in this paper. The isotopic vector from the aqueous separation of transuranic (TRU) elements in Light Water Reactor (LWR) spent nuclear fuel (SNF) is assumed to also vary according to the reprocessing strategy of the closed fuel cycle. The decay heat, gamma energy, and neutron emission of the fuel discharge at equilibrium are found to vary depending on the separation strategy. The SFR core used in this study corresponds to a burner configuration with a conversion ratio of ~0.5 based on the Super-PRISM design. The reprocessing strategies stemming from the choice of either metal or oxide fuel for the SFR are found to have a large impact on the equilibrium discharge decay heat, gamma energy, and neutron emission. Specifically, metal fuel SFR with pyroprocessing of the discharge produces the largest amount of TRU consumption (166 kg per Effective Full Power Year or EFPY), but also the highest decay heat, gamma energy, and neutron emission. On the other hand, an oxide fuel SFR with PUREX reprocessing minimizes the decay heat and related parameters of interest to a minimum, even when compared to thermal Mixed Oxide (MOX) or Inert Matrix Fuel (IMF) on a per mass basis. On an assembly basis, however, the metal SFR discharge has a lower decay heat than an equivalent oxide SFR assembly for similar minor actinide consumptions (~160 kg/EFPY.) Another disadvantage in the oxide PUREX reprocessing scenario is that there is no consumption of americium and curium, since PUREX reprocessing separates these minor actinides (MA) and requires them to be disposed of externally.

Mehdi Asgari; Samuel E. Bays; Benoit Forget; Rodolfo Ferrer

2007-09-01T23:59:59.000Z

147

Separations Technology for Clean Water and Energy  

SciTech Connect (OSTI)

Providing clean water and energy for about nine billion people on the earth by midcentury is a daunting challenge. Major investments in efficiency of energy and water use and deployment of all economical energy sources will be needed. Separations technology has an important role to play in producing both clean energy and water. Some examples are carbon dioxide capture and sequestration from fossil energy power plants and advanced nuclear fuel cycle scemes. Membrane separations systems are under development to improve the economics of carbon capture that would be required at a huge scale. For nuclear fuel cycles, only the PUREX liquid-liquid extraction process has been deployed on a large scale to recover uranium and plutonium from used fuel. Most current R and D on separations technology for used nuclear fuel focuses on ehhancements to a PUREX-type plant to recover the minor actinides (neptunium, americiu, and curium) and more efficiently disposition the fission products. Are there more efficient routes to recycle the actinides on the horizon? Some new approaches and barriers to development will be briefly reviewed.

Jarvinen, Gordon D [Los Alamos National Laboratory

2012-06-22T23:59:59.000Z

148

Enhancing BWR Proliferation Resistance Fuel with Minor Actinides  

SciTech Connect (OSTI)

Key aspects of the Global Nuclear Energy Partnership (GNEP) are to significantly advance the science and technology of nuclear energy systems and the Advanced Fuel Cycle (AFC) program. It consists of both innovative nuclear reactors and innovative research in separation and transmutation. To accomplish these goals, international cooperation is very important and public acceptance is crucial. The merits of nuclear energy are high-density energy, with low environmental impacts (i.e. almost zero greenhouse gas emission). Planned efforts involve near-term and intermediate-term improvements in fuel utilization and recycling in current light water reactors (LWRs) as well as the longer-term development of new nuclear energy systems that offer much improved fuel utilization and proliferation resistance, along with continued advances in operational safety. The challenges are solving the energy needs of the world, protection against nuclear proliferation, the problem of nuclear waste, and the global environmental problem. To reduce spent fuel for storage and enhance the proliferation resistance for the intermediate-term, there are two major approaches (a) increase the discharged spent fuel burnup in the advanced LWR (Gen-III Plus), which not only can reduce the spent fuel for storage, but also increase the 238Pu and 240Pu isotopes ratio to enhance the proliferation resistance, and (b) use of transuranic nuclides (237Np and 241Am) in the high burnup fuel, which can drastically increase the proliferation resistance isotope ratio of 238Pu /Pu. For future advanced nuclear systems, the minor actinides (MA) are viewed more as a resource to be recycled, or transmuted to less hazardous and possibly more useful forms, rather than simply as a waste stream to be disposed of in expensive repository facilities. As a result, MAs play a much larger part in the design of advanced systems and fuel cycles, not only as additional sources of useful energy, but also as direct contributors to the reactivity control of the systems into which they are incorporated. In the study, a typical boiling water reactor (BWR) fuel unit lattice cell model with UO2 fuel pins will be used to investigate the effectiveness of minor actinide reduction approach (MARA) for enhancing proliferation resistance and improving the fuel cycle performance in the intermediate term goal for future nuclear energy systems. To account for the water coolant density variation from the bottom (0.76 g/cm3) to the top (0.35 g/cm3) of the core, the axial coolant channel and fuel pin were divided to 24 nodes. The MA transmutation characteristics at different elevations were compared and their impact on neutronics criticality discussed. We concluded that the concept of MARA, which involves the use of transuranic nuclides (237Np and/or 241Am), significantly increases the 238Pu/Pu ratio for proliferation resistance, as well as serves as a burnable absorber to hold-down the initial excess reactivity. It is believed that MARA can play an important role in atoms for peace and the intermediate term of nuclear energy rennaissance.

Gray S. Chang

2008-07-01T23:59:59.000Z

149

Environmental Assessment for Actinide Chemistry and Repository Science  

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

questions on the Environmental Assessment for Actinide Chemistry and Repository Science Laboratory, email Harold.Johnson@wipp.ws or call (505) 234-7349. questions on the Environmental Assessment for Actinide Chemistry and Repository Science Laboratory, email Harold.Johnson@wipp.ws or call (505) 234-7349. Environmental Assessment for Actinide Chemistry and Repository Science Laboratory Final - January, 2006 This document has been provided to you in PDF format. Please install Adobe Acrobat Reader before accessing these documents. Some of the Chapters containing complex graphics have been split into multiple parts to allow for more detail in the graphics and ease in downloading. Cover Sheet, Table of Contents, List of Tables, List of Figures, and Acronyms and Abbreviations Chapter 1 - Introduction and Statement of Purpose and Need Chapter 2 - Proposed Action and Alternatives Chapter 3 - Existing Environment

150

Actinide (III) solubility in WIPP Brine: data summary and recommendations  

SciTech Connect (OSTI)

The solubility of actinides in the +3 oxidation state is an important input into the Waste Isolation Pilot Plant (WIPP) performance assessment (PA) models that calculate potential actinide release from the WIPP repository. In this context, the solubility of neodymium(III) was determined as a function of pH, carbonate concentration, and WIPP brine composition. Additionally, we conducted a literature review on the solubility of +3 actinides under WIPP-related conditions. Neodymium(III) was used as a redox-invariant analog for the +3 oxidation state of americium and plutonium, which is the oxidation state that accounts for over 90% of the potential release from the WIPP through the dissolved brine release (DBR) mechanism, based on current WIPP performance assessment assumptions. These solubility data extend past studies to brine compositions that are more WIPP-relevant and cover a broader range of experimental conditions than past studies.

Borkowski, Marian; Lucchini, Jean-Francois; Richmann, Michael K.; Reed, Donald T.

2009-09-01T23:59:59.000Z

151

Selection of actinide chemical analogues for WIPP tests  

SciTech Connect (OSTI)

The Department of Energy must demonstrate the effectiveness of the Waste Isolation Pilot Plant (WIPP) as a permanent repository for the disposal of transuranic (TRU) waste. Performance assessments of the WIPP require that estimates of the transportability and outcome of the radionuclides (actinides) be determined from disposal rooms that may become either partially or completely filled with brine. Federal regulations limit the amount of radioactivity that may be unintentionally released to the accessible environment by any mechanism during the post closure phase up to 10,000 years. Thermodynamic models have been developed to predict the concentrations of actinides in the WIPP disposal rooms under various situations and chemical conditions. These models are based on empirical and theoretical projections of the chemistry that might be present in and around the disposal room zone for both near and long-term periods. The actinides that are known to be present in the TRU wastes (and are included in the model) are Th, U, Np, Pu, and Am. Knowledge of the chemistry that might occur in the disposal rooms when the waste comes in contact with brine is important in understanding the range of oxidation states that might be present under different conditions. There is a need to establish the mechanisms and resultant rate of transport, migration, or effective retardation of actinides beyond the disposal rooms to the boundary of the accessible environment. The influence of the bulk salt rock, clay sediments and other geologic matrices on the transport behavior of actinides must be determined to establish the overall performance and capability of the WIPP in isolating waste from the environment. Tests to determine the capabilities of the WIPP geologic formations in retarding actinide species in several projected oxidation states would provide a means to demonstrate the effectiveness of the WIPP in retaining TRU wastes.

Villarreal, R.; Spall, D.

1995-07-05T23:59:59.000Z

152

4. International reservoir characterization technical conference  

SciTech Connect (OSTI)

This volume contains the Proceedings of the Fourth International Reservoir Characterization Technical Conference held March 2-4, 1997 in Houston, Texas. The theme for the conference was Advances in Reservoir Characterization for Effective Reservoir Management. On March 2, 1997, the DOE Class Workshop kicked off with tutorials by Dr. Steve Begg (BP Exploration) and Dr. Ganesh Thakur (Chevron). Tutorial presentations are not included in these Proceedings but may be available from the authors. The conference consisted of the following topics: data acquisition; reservoir modeling; scaling reservoir properties; and managing uncertainty. Selected papers have been processed separately for inclusion in the Energy Science and Technology database.

NONE

1997-04-01T23:59:59.000Z

153

Missouri Agriculture Outlook Conference  

E-Print Network [OSTI]

Missouri Agriculture Outlook Conference Conference Information This conference will discuss the drivers of Missouri agricultural and bio-fuel markets and the implications for Missouri farmsDr.JonHagler, DirectoroftheMissouriDepartment ofAgriculture. · Outlookpresentationsderivedfrom thelatestbaselineresultsof

Noble, James S.

154

Methyltrihydroborate complexes of the lanthanides and actinides  

SciTech Connect (OSTI)

Reaction of MC1/sub 4/ (M = Zr, Hf, U, Th, Np) with LiBH/sub 3/CH/sub 3/ in chlorobenzene produces volatile, hexane-soluble M(BH/sub 3/CH/sub 3/)/sub 4/. Crystal structures are monomeric, tetrahedral species. Lewis base adducts prepared include U(BH/sub 3/CH/sub 3/)/sub 4/.THT, Th(BH/sub 3/CH/sub 3/)/sub 4/.L (L = THF (tetrahydrofuran), THT (tetrahydrothiophene), SMe/sub 2/, OMe/sub 2/), U(BH/sub 3/CH/sub 3/)/sub 4/.2L (L = THF, pyridine, NH/sub 3/), Th(BH/sub 3/CH/sub 3/)/sub 4/.2L (L = THF, THT, py, NH/sub 3/), M(BH/sub 3/CH/sub 3/)/sub 4/.L-L (M = U, Th; L-L = dme (1,2-dimethoxyethane), bmte (bis(1,2-methylthio)ethane), tmed (N,N,N',N'-tetramethylethylenediamine), dmpe (1,2-dimethylphosphinoethane)) and Th(BH/sub 3/CH/sub 3/)/sub 4/.1/2 OEt/sub 2/. Reaction of MC1/sub 3/ (M = Ho, Yb, Lu) with LiBH/sub 3/CH/sub 3/ in diethyl ether produces volatile, toluene-soluble M(BH/sub 3/CH/sub 3/)/sub 3/.OEt/sub 2/. Other Lewis base adducts prepared from M(BH/sub 3/CH/sub 3/)/sub 3/.OEt/sub 2/ include Ho(BH/sub 3/CH/sub 3/)/sub 3/.L (L = THT, THF, py), Ho(BH/sub 3/CH/sub 3/)/sub 3/.2L (L = THT, THF, py), Ho(BH/sub 3/CH/sub 3/)/sub 3/.tmed, Ho(BH/sub 3/CH/sub 3/)/sub 3/.3/2 L-L (L-L = dmpe, bmte), Yb(BH/sub 3/CH/sub 3/)/sub 3/.3/2 dmpe, Yb(BH/sub 3/Ch/sub 3/).L (L = THF, dme), Yb(BH/sub 3/CH/sub 3/)/sub 3/.2THF, and Lu(BH/sub 3/CH/sub 3/)/sub 3/.THF. By structural criteria, the bonding in actinide and lanthanide methyltrihydroborate complexes is primarily ionic in character even though they display covalent-like physical properties. Spectroscopic measurements indicate that there is some degree of covalent bonding in U(BH/sub 3/CH/sub 3/)/sub 4/.

Shinomoto, R.S.

1984-11-01T23:59:59.000Z

155

APS Conference Center  

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

Advanced Photon Source Conference Center The APS Conference Center at Argonne National Laboratory is the ideal location for scientific and professional meetings. The Center can...

156

Conferences, workshops, trainings  

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

Conferences aboutassetsimagesicon-70th2.jpg Conferences, workshops, trainings Los Alamos National Lab is situated on a mesatop on the eastern side of the Jemez Mountains, an...

157

SRI2007 Conference - Proceedings  

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

Conference Proceedings The SRI2007 Conference Proceedings will be published as a special issue of Nuclear Instruments and Methods in Physics Research, Section A (NIMA). Each...

158

Twelfth annual fluidized bed conference  

SciTech Connect (OSTI)

The Proceedings of the Twelfth Annual Fluidized Bed Conference held November 11-13, 1996 in Pittsburgh, PA are presented. Information is given on: owner`s discussions; new aspects and field upgrades in fluidized bed boilers; manufacturer`s perspectives; fuel considerations; FBC ash reclassification; and beneficial uses of FBC ash. Selected papers are indexed separately for inclusion in the Energy Science and Technology Database.

NONE

1996-12-31T23:59:59.000Z

159

Delayed neutron measurements from fast fission of actinide waste isotopes  

E-Print Network [OSTI]

, was suggested which would yield a superior fit to the measured data. A series of measurements were performed to test the hypothesis suggested by this alternate group structure. Using a set of highly purified actinide samples (provided by Oak Ridge National...

Charlton, William S.

2012-06-07T23:59:59.000Z

160

Preparation of actinide metal targets using special casting techniques  

Science Journals Connector (OSTI)

Various casting techniques and mold design have been evaluated at Rocky Flats for preparing actinide metal targets. A tilt-pour casting technique is used for targets > 0.040 in. thick, and an injection casting technique has been developed for targets neptunium, and uranium metal ingots and disks ranging from 0.005–0.600 in. thickness have been cast.

W.V. Conner

1972-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Conference Summary  

E-Print Network [OSTI]

This first Subaru international conference has highlighted the remarkably diverse and significant contributions made using the 8.2m Subaru telescope by both Japanese astronomers and the international community. As such, it serves as a satisfying tribute to the pioneering efforts of Professors Keiichi Kodaira and Sadanori Okamura whose insight and dedication is richly rewarded. Here I try to summarize the recent impact of wide field science in extragalactic astronomy and cosmology and take a look forward to the key questions we will address in the near future.

Richard S Ellis

2008-07-06T23:59:59.000Z

162

Conference: Big money at teacher conference  

Science Journals Connector (OSTI)

Conference: Big money at teacher conference Conference: Physics truly is international Advancing science: Physics education fun in York Festival: A science fair in the middle of the street Website: Physics ethics project launches website Competition: UK Olympiad team goes to Iran Forthcoming Events

163

APPA Customer Connections Conference  

Office of Energy Efficiency and Renewable Energy (EERE)

The Customer Connections Conference is APPA's annual meeting for utility professionals in the areas of:

164

EVENT PROSPECTUS Southeast Conference  

E-Print Network [OSTI]

EVENT PROSPECTUS Southeast Conference on Positive Behavior Interventions and Support "CONFERENCE to CLASSROOM Connection" This year's conference offers two strands of training. TRACT 1. Foundations of PBIS be established. The most important goal of this conference is to positively change the educational environment

Hutcheon, James M.

165

Conference matrices Peter Cameron  

E-Print Network [OSTI]

Conference matrices Peter Cameron A conference matrix is an nÃ?n matrix C with zeros on the diagonal that its diagonal entries are zero and the other entries have modulus at most 1. Conference matrices first arose in the 1950s in connection with conference telephony, and more recently have had applications

Banaji,. Murad

166

Conference Registration Department of  

E-Print Network [OSTI]

Conference Registration Department of Pathology Course Cancellation Policy: Requests of the conference. No refunds can be made for cancellation requests postmarked after August 6, 2012 . The Medical will be refunded in full. Conference Dates: September 12 ­ 14, 2014 Conference Location: InterContinental Hotel

167

WINTER UNIVERSIADE CONFERENCE 2013  

E-Print Network [OSTI]

WINTER UNIVERSIADE CONFERENCE 2013 December 9-10 International Interdisciplinary Conference on) Rovereto (Trento), Italy 1st Announcement www.universiadetrentino.org #12;MAIN CONFERENCE THEME The main goal of the Trentino 2013 Conference is to work on the relationship between sport and innovation

Di Pillo, Gianni

168

ESSCIRC' 85 European Conference  

E-Print Network [OSTI]

ESSCIRC' 85 European Conference on Solid State Circuits Fo reword The 11th European Conference participants from 28 countries. This Conference is the European annual meeting for presentation and discussion of the latest news in the area of integrated circuit techniques. The covered subjects in this conference are key

Paris-Sud XI, Université de

169

Toward understanding the thermodynamics of TALSPEAK process. Medium effects on actinide complexation  

SciTech Connect (OSTI)

The ingenious combination of lactate and diethylenetriamine-N,N,N’,N”,N”-pentaacetic acid (DTPA) as an aqueous actinide-complexing medium forms the basis of the successful separation of americium and curium from lanthanides known as the TALSPEAK process. While numerous reports in the prior literature have focused on the optimization of this solvent extraction system, considerably less attention has been devoted to the understanding of the basic thermodynamic features of the complex fluids responsible for the separation. The available thermochemical information of both lactate and DTPA protonation and metal complexation reactions are representative of the behavior of these ions under idealized conditions. Our previous studies of medium effects on lactate protonation suggest that significant departures from the speciation predicted based on reported thermodynamic values should be expected in the TALSPEAK aqueous environment. Thermodynamic parameters describing the separation chemistry of this process thus require further examination at conditions significantly removed from conventional ideal systems commonly employed in fundamental solution chemistry. Such thermodynamic characterization is the key to predictive modelling of TALSPEAK. Improved understanding will, in principle, allow process technologists to more efficiently respond to off-normal conditions during large scale process operation. In this report, the results of calorimetric and potentiometric investigations of the effects of aqueous electrolytes on the thermodynamic parameters for lactate protonation and lactate complexation of americium and neodymium will be presented. Studies on the lactate protonation equilibrium will clearly illustrate distinct thermodynamic variations between strong electrolyte aqueous systems and buffered lactate environment.

Peter R Zalupski; Leigh R Martin; Ken Nash; Yoshinobu Nakamura; Masahiko Yamamoto

2009-07-01T23:59:59.000Z

170

Separation system  

DOE Patents [OSTI]

A separation system for dewatering radioactive waste materials includes a disposal container, drive structure for receiving the container, and means for releasably attaching the container to the drive structure. Separation structure disposed in the container adjacent the inner surface of the side wall structure retains solids while allowing passage of liquids. Inlet port structure in the container top wall is normally closed by first valve structure that is centrifugally actuated to open the inlet port and discharge port structure at the container periphery receives liquid that passes through the separation structure and is normally closed by second valve structure that is centrifugally actuated to open the discharge ports. The container also includes coupling structure for releasable engagement with the centrifugal drive structure. Centrifugal force produced when the container is driven in rotation by the drive structure opens the valve structures, and radioactive waste material introduced into the container through the open inlet port is dewatered, and the waste is compacted. The ports are automatically closed by the valves when the container drum is not subjected to centrifugal force such that containment effectiveness is enhanced and exposure of personnel to radioactive materials is minimized.

Rubin, Leslie S. (Newton, MA)

1986-01-01T23:59:59.000Z

171

Separation of Nuclear Fuel Surrogates from Silicon Carbide Inert Matrix  

SciTech Connect (OSTI)

The objective of this project has been to identify a process for separating transuranic species from silicon carbide (SiC). Silicon carbide has become one of the prime candidates for the matrix in inert matrix fuels, (IMF) being designed to reduce plutonium inventories and the long half-lives actinides through transmutation since complete reaction is not practical it become necessary to separate the non-transmuted materials from the silicon carbide matrix for ultimate reprocessing. This work reports a method for that required process.l

Dr. Ronald Baney

2008-12-15T23:59:59.000Z

172

Separation of plutonium and americium by low-temperature fluorination  

SciTech Connect (OSTI)

The authors have demonstrated separation of Pu and in-grown Am using the gaseous reagent dioxygen difluoride. Aged PuF{sub 4} was fluorinated at room temperature to generate PuF{sub 6} gas, which was trapped separately and reduced to PuF{sub 4}. The reaction product contained very little Am. Unreacted solid had elevated concentrations of Am that were consistent with a material balance. Use of a gaseous reagent and product enabled remote handling during reaction and purification. This result demonstrated a simple and minimal waste alternative that may have application to a number of actinide purification problems.

Mills, T.R.; Reese, L.W.

1993-10-01T23:59:59.000Z

173

Conjugates of Magnetic Nanoparticle—Actinide Specific Chelator for Radioactive Waste Separation  

Science Journals Connector (OSTI)

Cuillerdier, C.; Musikas, C.; Hoel, P.; Nigond, L.; Vitart, X.Malonamides as new extractants for nuclear waste solutions Sep. ... Cuillerdier, C.; Musikas, C.; Hoel, P.; Nigond, L.; Vitart, X. ...

Maninder Kaur; Huijin Zhang; Leigh Martin; Terry Todd; You Qiang

2013-09-26T23:59:59.000Z

174

Understanding the Chemistry of Uncommon Americium Oxidation States for Application to Actinide/Lanthanide Separations  

SciTech Connect (OSTI)

A spectroscopic study of the stability of Am(V) and Am(VI) produced by oxidizing Am(III) with sodium bismuthate is presented, varying the initial americium concentration, temperature and length of the oxidation was seen to have profound effects on the resultant solutions.

Leigh Martin; Bruce J. Mincher; Nicholas C. Schmitt

2007-09-01T23:59:59.000Z

175

NETL: First National Conference on Carbon Sequestration  

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

First National Conference on Carbon Sequestration First National Conference on Carbon Sequestration Table of Contents Disclaimer Papers and Presentations Plenary Session Industry Focus Panel Discussion Session 1A. Geologic Sequestration I - Overview Session 1B. Capture & Separation I - Industrial Efforts Session 1C. Modeling I - Case Studies & Deployment Session 2A. Geologic Sequestration II - EOR/EGR Session 2B. Capture & Separation II - Improved Processes Session 2C. Modeling II - Economics Poster Presentations International Panel Discussion Session 3A. Geologic Sequestration III - Enhanced Coalbed Methane Session 3B. Capture & Separation III - Adsorption Studies Session 3C. Terrestrial Sequestration I - Ecosystem Behavior Session 4A. Geologic Sequestration IV - Saline Aquifers Session 4B. Capture & Separation IV - Power Systems Concepts

176

Conference news  

Science Journals Connector (OSTI)

An international conference on undergraduate physics education, entitled `The changing role of the physics department in modern universities', will take place at the University of Maryland, USA, on 31 July - 3 August 1996. Issues to be covered at the meeting include: Physics majors - what is a proper physics education for different career paths?; Scientists and engineers - what is the appropriate physics to teach them?; Teachers - what can physics departments do to train teachers?; Physics education research - can we modify how we teach based on how students learn?; Applications of modern technologies - how can new computers and networks be used to improve student learning?. There will be general overviews, parallel sessions, posters, sample classes and panel discussions. Details of the conference may be obtained from Dan Campbell, Department of Physics, University of Maryland, College Park, MD 20742, USA (fax in USA: 301-314-9525 or email: inted@physics.umd.edu). Science centre professionals have their own first science centre world congress at Heureka in Finland on 14-18 June 1996. The aim of the congress is to facilitate international cooperation between science centres and to bring together science centre colleagues to learn from and share experiences. Participants will be attending from over 50 different countries, reflecting the truly global nature of the event. The theme is `Learning for tomorrow' and there will be discussions, professional sessions, workshops, contests and live science shows. Other programme topics include travelling exhibitions, communication, learning and visitor research and human resources. More information is available from Ms Helena von Troil, Secretary-General, Heureka, The Finnish Science Centre, PO Box 166, FIN-01301 Vantaa, Finland (fax: +358 0873 4142, email: helena.von.troil@heureka.fi).

177

Development of a remote bushing for actinide vitrification  

SciTech Connect (OSTI)

The Savannah River Site (SRS) and the Savannah River Technology Center (SRTC) are combining their existing experience in handling highly radioactive, special nuclear materials with commercial glass fiberization technology in order to assemble a small vitrification system for radioactive actinide solutions. The vitrification system or {open_quotes}brushing{close_quotes}, is fabricated from platinum-rhodium alloy and is based on early marble remelt fiberization technology. Advantages of this unique system include its relatively small size, reliable operation, geometrical safety (nuclear criticality), and high temperature capability. The bushing design should be capable of vitrifying a number of the actinide nuclear materials, including solutions of americium/curium, neptunium, and possibly plutonium. State of the art, mathematical and oil model studies are being combined with basic engineering evaluations to verify and improve the thermal and mechanical design concepts.

Schumacher, R.F.; Ramsey, W.G.; Johnson, F.M. [and others

1996-12-31T23:59:59.000Z

178

ACTINIDE-SPECIFIC SEQUESTERING AGENTS AND DECONTAMINATION APPLICATIONS  

SciTech Connect (OSTI)

We have briefly reviewed the biological hazards associated with the actinide elements. The most abundant transuranium element produced by both industrial nuclear power plants and nuclear weapons programs is plutonium. It is also potentially the most toxic - particularly due to its long-term hazard as a carcinogen if it is introduced into the body. This toxicity is due in large part to the chemical and biochemical similarities of Pu(IV) and Fe(III). Thus in mammals plutonium is transported and stored by the transport and storage systems for iron. This results in the concentration and long-term retention of an alpha-emitting radionuclide ({sup 239}Pu) at sites such as the bone marrow where cell division occurs at a high rate. The earliest attempts at removal of actinide contamination by chelation therapy were essentially heuristic in that sequestering agents known to be effective at binding other elements were tried with plutonium. The research described here is intended to be a rational approach that begins with the observation that since Fe(III) and Pu(IV) are so similar, and since microbes produce agents called siderophores that are extremely effective and selective sequestering agents for Fe(III), the construction of similar chelating agents for the actinides should be possible using the same chelating groups found in the siderophores. The incorporation of four such groups (primarily catechol and hydroxamic acid) results in multidentate chelating agents that can completely encapsulate the central actinide(IV) ion and achieve the eight-coordinate environment most favored by such ions. The continuing development and improvement of such sequestering agents has produced compounds which remove significant amounts of plutonium deposited in bone and which remove a greater fraction of the total body burden than any other chelation therapy developed to date.

Smith, William L.; Raymond, Kenneth N.

1980-07-01T23:59:59.000Z

179

Toward laser ablation Accelerator Mass Spectrometry of actinides  

SciTech Connect (OSTI)

A project to measure neutron capture cross sections of a number of actinides in a reactor environment by Accelerator Mass Spectrometry (AMS) at the ATLAS facility of Argonne National Laboratory is underway. This project will require the precise and accurate measurement of produced actinide isotopes in many (>30) samples irradiated in the Advanced Test Reactor at Idaho National Laboratory with neutron fluxes having different energy distributions. The AMS technique at ATLAS is based on production of highlycharged positive ions in an electron cyclotron resonance (ECR) ion source followed by acceleration in the ATLAS linac and mass-to-charge (m/q) measurement at the focus of the Fragment Mass Analyzer. Laser ablation was selected as the method of feeding the actinide material into the ion source because we expect it will have higher efficiency and lower chamber contamination than either the oven or sputtering techniques, because of a much narrower angular distribution of emitted material. In addition, a new multi-sample holder/changer to allow quick change between samples and a computer-controlled routine allowing fast tuning of the accelerator for different beams, are being developed. An initial test run studying backgrounds, detector response, and accelerator scaling repeatability was conducted in December 2010. The project design, schedule, and results of the initial test run to study backgrounds are discussed.

R. C. Pardo; F. G. Kondev; S. Kondrashev; C. Nair; T. Palchan; R. Scott; D. Seweryniak; R. Vondrasek; M. Paul; P. Collon; C. Deibel; M. Salvatores; G. Palmiotti; J. Berg; J. Fonnesbeck; G. Imel

2013-01-01T23:59:59.000Z

180

A literature review of actinide-carbonate mineral interactions  

SciTech Connect (OSTI)

Chemical retardation of actinides in groundwater systems is a potentially important mechanism for assessing the performance of the Waste Isolation Pilot Plant (WIPP), a facility intended to demonstrate safe disposal of transuranic waste. Rigorous estimation of chemical retardation during transport through the Culebra Dolomite, a water-bearing unit overlying the WIPP, requires a mechanistic understanding of chemical reactions between dissolved elements and mineral surfaces. This report represents a first step toward this goal by examining the literature for pertinent experimental studies of actinide-carbonate interactions. A summary of existing models is given, along with the types of experiments on which these models are based. Articles pertaining to research into actinide interactions with carbonate minerals are summarized. Select articles involving trace element-carbonate mineral interactions are also reviewed and may serve as templates for future research. A bibliography of related articles is included. Americium(III), and its nonradioactive analog neodymium(III), partition strongly from aqueous solutions into carbonate minerals. Recent thermodynamic, kinetic, and surface studies show that Nd is preferentially removed from solution, forming a Nd-Ca carbonate solid solution. Neptunium(V) is rapidly removed from solution by carbonates. Plutonium incorporation into carbonates is complicated by multiple oxidation states. Little research has been done on the radium(H) and thorium(IV) carbonate systems. Removal of uranyl ion from solution by calcite is limited to monolayer surface coverage.

Stout, D.L. [Missouri Univ., Columbia, MO (United States). Dept. of Geological Sciences; Carroll, S.A. [Lawrence Livermore National Lab., CA (United States)

1993-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

The EBR-II X501 Minor Actinide Burning Experiment  

SciTech Connect (OSTI)

The X501 experiment was conducted in EBR-II as part of the IFR (Integral Fast Reactor) program to demonstrate minor actinide burning through the use of a homogeneous recycle scheme. The X501 subassembly contained two metallic fuel elements loaded with relatively small quantities of americium and neptunium. Interest in the behavior of minor actinides (MA) during fuel irradiation has prompted further examination of existing X501 data, and generation of new data where needed in support of the U.S. waste transmutation effort. The X501 experiment is one of the few minor actinide-bearing fuel irradiation tests conducted worldwide and knowledge can be gained by understanding the changes in fuel behavior due to addition of MA’s. Of primary interest are the affect of the MA’s on fuel-cladding-chemical-interaction, and the redistribution behavior of americium. The quantity of helium gas release from the fuel and any effects of helium on fuel performance are also of interest. It must be stressed that information presented at this time is based on the limited PIE conducted in 1995-1996, and currently represents a set of observations rather than a complete understanding of fuel behavior. This paper provides a summary of the X501 fabrication, characterization, irradiation, and post irradiation examination.

M. K. Meyer; S. L. Hayes; W. J. Carmack; H. Tsai

2009-07-01T23:59:59.000Z

182

The EBR-II X501 Minor Actinide Burning Experiment  

SciTech Connect (OSTI)

The X501 experiment was conducted in EBR-II as part of the IFR (Integral Fast Reactor) program to demonstrate minor actinide burning through the use of a homogeneous recycle scheme. The X501 subassembly contained two metallic fuel elements loaded with relatively small quantities of americium and neptunium. Interest in the behavior of minor actinides (MA) during fuel irradiation has prompted further examination of existing X501 data, and generation of new data where needed in support of the U.S. waste transmutation effort. The X501 experiment is one of the few minor actinide-bearing fuel irradiation tests conducted worldwide and knowledge can be gained by understanding the changes in fuel behavior due to addition of MA’s. Of primary interest are the affect of the MA’s on fuel-cladding-chemical-interaction, and the redistribution behavior of americium. The quantity of helium gas release from the fuel and any effects of helium on fuel performance are also of interest. It must be stressed that information presented at this time is based on the limited PIE conducted in 1995-1996, and currently represents a set of observations rather than a complete understanding of fuel behavior.

Jon Carmack; S. L. Hayes; M. K. Meyer; H. Tsai

2008-06-01T23:59:59.000Z

183

1987 Oak Ridge model conference: Proceedings  

SciTech Connect (OSTI)

A conference sponsored by the United States Department of Energy (DOE), was held on waste management. Topics included waste management, site remediation, waste minimization, economic and social aspects of waste management, and waste management training. Several case studies of US DOE facilities are included. Individual projects are processed separately for the data bases. (CBS)

Not Available

1987-10-01T23:59:59.000Z

184

E-Print Network 3.0 - actinide transmutation reactor Sample Search...  

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

All these names are used... . The idea of combining powerful accelerators - with a subcritical reactor for transmutation purposes... homogeneous fuel Actinides MgO Tc Fast...

185

E-Print Network 3.0 - actinide burner core Sample Search Results  

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

the fuel... of minor actinides whose management would be problematic. Scenario with Light Water Reactors and Fast... and difficult process. Indeed, a 1 GWe reactor, whether it is...

186

E-Print Network 3.0 - actinide based fuel Sample Search Results  

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

MA represents minor actinides such as Np, Am, and Cm. Fuel... of the performance on the subcritical level. Numerical experiments are carried out on a ... Source: Royal Institute...

187

E-Print Network 3.0 - actinide consumption nuclear Sample Search...  

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

consumption nuclear Search Powered by Explorit Topic List Advanced Search Sample search results for: actinide consumption nuclear Page: << < 1 2 3 4 5 > >> 1 November 21, 2008 To:...

188

E-Print Network 3.0 - actinide recovery process Sample Search...  

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

report, April 2006 The report can... is a trivalent actinide and a chemical analog to curium, and it has many chemical similarities to trivalent... complexes stay in solution....

189

E-Print Network 3.0 - actinides including cm Sample Search Results  

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

Summary: of waste actinides. Such damage can be studied by many techniques, including heavy-ionfast neutron... were presented and proposed, including; Fundamental studies...

190

E-Print Network 3.0 - actinides review hyperfine Sample Search...  

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

Commission of the European Communities, Joint Research Centre, European... bande et la nature des liaisons chimiques sont tudies, pour les mtaux et composs d'actinides, ...

191

Crystal Chemistry of Early Actinides (Thorium, Uranium, and Neptunium) and Uranium Mesoporous Materials.  

E-Print Network [OSTI]

??Despite their considerable global importance, the structural chemistry of actinides remains understudied. Thorium and uranium fuel cycles are used in commercial nuclear reactors in India… (more)

Sigmon, Ginger E.

2010-01-01T23:59:59.000Z

192

EA-1404: Actinide Chemistry and Repository Science Laboratory, Carlsbad, New Mexico  

Broader source: Energy.gov [DOE]

This EA evaluates the environmental impacts for the proposal to construct and operate an Actinide Chemistry and Repository Science Laboratory to support chemical research activities related to the...

193

September 2005 Support Staff Conference  

E-Print Network [OSTI]

September 2005 Support Staff Conference TThe Third Annual Support Staff Conference was held's theme was Diversity Awareness and Enrichment: Appreciation of Differences. The conference's agen- da relationship begins with you!" MMore information on the conference, including photos and presenter texts

Myers, Lawrence C.

194

LIBS Spectral Data for a Mixed Actinide Fuel Pellet Containing Uranium, Plutonium, Neptunium and Americium  

SciTech Connect (OSTI)

Laser-induced breakdown spectroscopy (LIBS) was used to analyze a mixed actinide fuel pellet containing 75% UO{sub 2}/20% PuO{sub 2}/3% AmO{sub 2}/2% NpO{sub 2}. The preliminary data shown here is the first report of LIBS analysis of a mixed actinide fuel pellet, to the authors knowledge. The LIBS spectral data was acquired in a plutonium facility at Los Alamos National Laboratory where the sample was contained within a glove box. The initial installation of the glove box was not intended for complete ultraviolet (UV), visible (VIS) and near infrared (NIR) transmission, therefore the LIBS spectrum is truncated in the UV and NIR regions due to the optical transmission of the window port and filters that were installed. The optical collection of the emission from the LIBS plasma will be optimized in the future. However, the preliminary LIBS data acquired is worth reporting due to the uniqueness of the sample and spectral data. The analysis of several actinides in the presence of each other is an important feature of this analysis since traditional methods must chemically separate uranium, plutonium, neptunium, and americium prior to analysis. Due to the historic nature of the sample fuel pellet analyzed, the provided sample composition of 75% UO{sub 2}/20% PuO{sub 2}/3% AmO{sub 2}/2% NpO{sub 2} cannot be confirm without further analytical processing. Uranium, plutonium, and americium emission lines were abundant and easily assigned while neptunium was more difficult to identify. There may be several reasons for this observation, other than knowing the exact sample composition of the fuel pellet. First, the atomic emission wavelength resources for neptunium are limited and such techniques as hollow cathode discharge lamp have different dynamics than the plasma used in LIBS which results in different emission spectra. Secondly, due to the complex sample of four actinide elements, which all have very dense electronic energy levels, there may be reactions and interactions occurring within the plasma, such as collisional energy transfer, that might be a factor in the reduction in neptunium emission lines. Neptunium has to be analyzed alone using LIBS to further understand the dynamics that may be occurring in the plasma of the mixed actinide fuel pellet sample. The LIBS data suggests that the emission spectrum for the mixed actinide fuel pellet is not simply the sum of the emission spectra of the pure samples but is dependent on the species present in the plasma and the interactions and reactions that occur within the plasma. Finally, many of the neptunium lines are in the near infrared region which is drastically reduced in intensity by the current optical setup and possibly the sensitivity of the emission detector in the spectral region. Once the optics are replaced and the optical collection system is modified and optimized, the probability of observing emission lines for neptunium might be increased significantly. The mixed actinide fuel pellet was analyzed under the experimental conditions listed in Table 1. The LIBS spectra of the fuel pellet are shown in Figures 1-49. The spectra are labeled with the observed wavelength and atomic species (both neutral (I) and ionic (II)). Table 2 is a complete list of the observed and literature based emission wavelengths. The literature wavelengths have references including NIST Atomic Spectra Database (NIST), B.A. Palmer et al. 'An Atlas of Uranium Emission Intensities in a Hollow Cathode Discharge' taken at the Kitt Peak National Observatory (KPNO), R.L. Kurucz 1995 Atomic Line Data from the Smithsonian Astrophysical Observatory (SAO), J. Blaise et al. 'The Atomic Spectrum of Plutonium' from Argonne National Laboratory (BFG), and M. Fred and F.S. Tomkins, 'Preliminary Term Analysis of Am I and Am II Spectra' (FT). The dash (-) shown under Ionic State indicates that the ionic state of the transition was not available. In the spectra, the dash (-) is replaced with a question mark (?). Peaks that are not assigned are most likely real features and not noise but cannot be confidently assi

Judge, Elizabeth J. [Los Alamos National Laboratory; Berg, John M. [Los Alamos National Laboratory; Le, Loan A. [Los Alamos National Laboratory; Lopez, Leon N. [Los Alamos National Laboratory; Barefield, James E. [Los Alamos National Laboratory

2012-06-18T23:59:59.000Z

195

Symbiosis Biofeedstock Conference: Expanding Commercialization...  

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

Biofeedstock Conference: Expanding Commercialization of Mutualistic Microbes to Increase Feedstock Production Symbiosis Biofeedstock Conference: Expanding Commercialization of...

196

Separation Processes, Second Edition  

E-Print Network [OSTI]

by; Uranium isotopes separation) Iteration methods (seemethod for activity coefficients, 43, 481 Uranium isotopes separation,

King, C. Judson

1980-01-01T23:59:59.000Z

197

Gordon conference clones  

Science Journals Connector (OSTI)

... Mitchell of Clarendon Laboratory in Oxford, is trying to develop an array of European Research Conferences modelled on the renowned Gordon ... modelled on the renowned Gordon Conferences in the United States.

Steven Dickman

1991-03-21T23:59:59.000Z

198

Conference Publications Kevin Hammond  

E-Print Network [OSTI]

Conference Publications Kevin Hammond University of St Andrews, Scotland A Practical Guide for the Practicing PhD Student #12;Slide 2Kevin Hammond, University of St Andrews SICSA PhD Conference 2011 TargetD Students ­ What is a good conference paper ­ Some Tips and Tricks #12;Slide 3Kevin Hammond, University

St Andrews, University of

199

International Conference Water Efficiency  

E-Print Network [OSTI]

International Conference Water Efficiency in Urban Areas Concepts, Technologies, Socio Economics for PostersRegistration via Fax: +49 941 29688-17 Yes, I will participate International Conference Water of the invoice. Payment must be received no later than 14 days before the conference begins (it has to be sett

Wehrli, Bernhard

200

Conference on phosphorus chemistry  

Science Journals Connector (OSTI)

The International Conference on Phosphorus Chemistry will be held on June 1-5,1981, in Durham, N.C. It is a continuation of the series of international conferences which last assembled in Halle, West Germany, in 1979. The conference will be held at Duke ...

1980-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

2015 National Environmental Justice Conference & Training Program...  

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

2015 National Environmental Justice Conference & Training Program 2015 National Environmental Justice Conference & Training Program 2015 Conference Information More Documents &...

202

Gordon Research Conferences  

Science Journals Connector (OSTI)

...Chemical Glycobiology (Xi Chen / David Vocadlo...Morphogenesis (Radhika Atit / Ping Chen / Arjun Raj / Angela...Analysis (Nils Brose / Yishi Jin / Graeme Davis / Kang Shen...Christine Thomas / Zhenfeng Xi) Lanthanides and Actinides...Weitz / Petia Vlohovska / Ping Sheng / Emmanuel Fort...

2011-02-04T23:59:59.000Z

203

STRONTIUM AND ACTINIDE SORPTION BY MST AND MMST UNDER CONDITIONS REVELANT TO THE SMALL COLUMN ION-EXCHANGE PROCESS  

SciTech Connect (OSTI)

A series of tests were performed to examine the kinetics of Sr and actinide removal by monosodium titanate (MST) and modified monosodium titanate (mMST) under mixing conditions similar to what will be provided in the Small Column Ion Exchange (SCIX) Program. Similar removal kinetics were seen for two different mixing energies, indicating that under these conditions bulk solution transport is not the rate limiting step for Sr and actinide removal. Sr removal was found to be rapid for both MST and mMST, reaching steady-state conditions within six hours. In contrast, at least six weeks is necessary to reach steady-state conditions for Pu with MST. For mMST, steady-state conditions for Pu were achieved within two weeks. The actual contact time required for the SCIX process will depend on starting sorbate concentrations as well as the requirements for the decontaminated salt solution. During testing leaks occurred in both the MST and mMST tests and evidence of potential desorption was observed. The desorption likely occurred as a result of the change in solids to liquid phase ratio that occurred due to the loss of solution. Based on these results, Savannah River National Laboratory (SRNL) recommended additional testing to further study the effect of changing phase ratios on desorption. This testing is currently in progress and results will be documented in a separate report.

Taylor-Pashow, K.; Hobbs, D.; Poirier, M.

2011-05-06T23:59:59.000Z

204

Mathematical modeling of the effects of aerobic and anaerobic chelate bioegradation on actinide speciation.  

SciTech Connect (OSTI)

Biodegradation of natural and anthropogenic chelating agents directly and indirectly affects the speciation, and, hence, the mobility of actinides in subsurface environments. We combined mathematical modeling with laboratory experimentation to investigate the effects of aerobic and anaerobic chelate biodegradation on actinide [Np(IV/V), Pu(IV)] speciation. Under aerobic conditions, nitrilotriacetic acid (NTA) biodegradation rates were strongly influenced by the actinide concentration. Actinide-chelate complexation reduced the relative abundance of available growth substrate in solution and actinide species present or released during chelate degradation were toxic to the organisms. Aerobic bio-utilization of the chelates as electron-donor substrates directly affected actinide speciation by releasing the radionuclides from complexed form into solution, where their fate was controlled by inorganic ligands in the system. Actinide speciation was also indirectly affected by pH changes caused by organic biodegradation. The two concurrent processes of organic biodegradation and actinide aqueous chemistry were accurately linked and described using CCBATCH, a computer model developed at Northwestern University to investigate the dynamics of coupled biological and chemical reactions in mixed waste subsurface environments. CCBATCH was then used to simulate the fate of Np during anaerobic citrate biodegradation. The modeling studies suggested that, under some conditions, chelate degradation can increase Np(IV) solubility due to carbonate complexation in closed aqueous systems.

Banaszak, J.E.; VanBriesen, J.; Rittmann, B.E.; Reed, D.T.

1998-03-19T23:59:59.000Z

205

Screening Evaluation of Sodium Nonatitanate for Strontium and Actinide Removal from Alkaline Salt Solution  

SciTech Connect (OSTI)

This report describes results from screening tests evaluating strontium and actinide removal characteristics of a sodium titanate material developed by Clearfield and coworkers at Texas A and M University and offered commercially by Honeywell. Sodium nonatitanate may exhibit improved actinide removal kinetics and filtration characteristics compared to MST and thus merit testing.

Hobbs, D.T.

2001-02-13T23:59:59.000Z

206

Biomass 2011 Conference Agenda | Department of Energy  

Office of Environmental Management (EM)

1 Conference Agenda Biomass 2011 Conference Agenda Biomass 2011 Conference Agenda bio2011fullagenda.pdf More Documents & Publications Biomass 2009 Conference Agenda Biomass 2010...

207

Biomass 2009 Conference Agenda | Department of Energy  

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

09 Conference Agenda Biomass 2009 Conference Agenda Biomass 2009 Conference Agenda bio2009fullagenda.pdf More Documents & Publications Biomass 2010 Conference Agenda Biomass 2011...

208

Academic Conference with a Grassroots Flavor  

E-Print Network [OSTI]

CSW upda te APRIL 2011 contents CONFERENCE PREVIEW BYLINDSEY MCLEAN Academic Conference with a Grassroots FlavorInternational LGBT Conference is upon us! The conference

McLean, Lindsey

2011-01-01T23:59:59.000Z

209

Actinide neutron-induced fission cross section measurements at LANSCE  

SciTech Connect (OSTI)

Fission cross sections of a range of actinides have been measured at the Los Alamos Neutron Science Center (LANSCE) in support of nuclear energy applications in a wide energy range from sub-thermal energies up to 200 MeV. A parallel-plate ionization chamber are used to measure fission cross sections ratios relative to the {sup 235}U standard while incident neutron energies are determined using the time-of-flight method. Recent measurements include the {sup 233,238}U, {sup 239-242}Pu and {sup 243}Am neutron-induced fission cross sections. Obtained data are presented in comparison with ex isting evaluations and previous data.

Tovesson, Fredrik K [Los Alamos National Laboratory; Laptev, Alexander B [Los Alamos National Laboratory; Hill, Tony S [INL

2010-01-01T23:59:59.000Z

210

Actinide Neutron-Induced Fission Cross Section Measurements At LANSCE  

SciTech Connect (OSTI)

Fission cross sections of a range of actinides have been measured at the Los Alamos Neutron Science Center (LANSCE) in support of nuclear energy applications in a wide energy range from sub thermal energies up to 200 MeV. Parallel-plate ionization chambers are used to measure fission cross sections ratios relative to the {sup 235}U standard while incident neutron energies are determined using the time-of-flight method. Recent measurements include the {sup 233,238}U, {sup 239-242}Pu and {sup 243}Am neutron-induced fission cross sections. Obtained data are presented in comparison with existing evaluations and previous data.

Tovesson, F.; Laptev, A. B. [Los Alamos National Laboratory, Los Alamos NM 87545 (United States); Hill, T. S. [Idaho National Laboratory, Idaho Falls ID 83415 (United States)

2011-06-01T23:59:59.000Z

211

Determination of actinides in environmental and biological samples using high-performance chelation ion chromatography coupled to sector-field inductively coupled plasma mass spectrometry  

Science Journals Connector (OSTI)

High-performance chelation ion chromatography, using a neutral polystyrene substrate dynamically loaded with 0.1 mM dipicolinic acid, coupled with sector-field inductively coupled plasma mass spectrometry has been successfully used for the separation of the actinides thorium, uranium, americium, neptunium and plutonium. Using this column it was possible to separate the various actinides from each other and from a complex sample matrix. In particular, it was possible to separate plutonium and uranium to facilitate the detection of the former free of spectral interference. The column also exhibited some selectivity for different oxidation states of Np, Pu and U. Two oxidation states each for plutonium and neptunium were found, tentatively identified as Np(V) and Pu(III) eluting at the solvent front, and Np(IV) and Pu(IV) eluting much later. Detection limits were 12, 8, and 4 fg for 237Np, 239Pu, and 241Am, respectively, for a 0.5 ml injection. The system was successfully used for the determination of 239Pu in NIST 4251 Human Lung and 4353 Rocky Flats Soil, with results of 570±29 and 2939±226 fg g?1, respectively, compared with a certified range of 227–951 fg g?1 for the former and a value of 3307± 248 fg g?1 for the latter.

Jason B. Truscott; Phil Jones; Ben E. Fairman; E. Hywel Evans

2001-01-01T23:59:59.000Z

212

DISTRIBUTION OF LANTHANIDE AND ACTINIDE ELEMENTS BETWEEN BIS-(2-ETHYLHEXYL)PHOSPHORIC ACID AND BUFFERED LACTATE SOLUTIONS CONTAINING SELECTED COMPLEXANTS  

SciTech Connect (OSTI)

With the renewed interest in the closure of the nuclear fuel cycle, the TALSPEAK process is being considered for the separation of Am and Cm from the lanthanide fission products in a next generation reprocessing plant. However, an efficient separation requires tight control of the pH which likely will be difficult to achieve on a large scale. To address this issue, we measured the distribution of lanthanide and actinide elements between aqueous and organic phases in the presence of complexants which were potentially less sensitive to pH control than the diethylenetriaminepentaacetic (DTPA) used in the process. To perform the extractions, a rapid and accurate method was developed for measuring distribution coefficients based on the preparation of lanthanide tracers in the Savannah River National Laboratory neutron activation analysis facility. The complexants tested included aceto-, benzo-, and salicylhydroxamic acids, N,N,N',N'-tetrakis(2-pyridylmethyl)ethylenediamine (TPEN), and ammonium thiocyanate (NH{sub 4}SCN). The hydroxamic acids were the least effective of the complexants tested. The separation factors for TPEN and NH{sub 4}SCN were higher, especially for the heaviest lanthanides in the series; however, no conditions were identified which resulted in separations factors which consistently approached those measured for the use of DTPA.

Rudisill, Tracy S.; Diprete, David P.; Thompson, Major C.

2013-04-15T23:59:59.000Z

213

Partition of actinides and fission products between metal and molten salt phases: Theory, measurement, and application to IFR pyroprocess development  

SciTech Connect (OSTI)

The chemical basis of Integral Fast Reactor fuel reprocessing (pyroprocessing) is partition of fuel, cladding, and fission product elements between molten LiCl-KCl and either a solid metal phase or a liquid cadmium phase. The partition reactions are described herein, and the thermodynamic basis for predicting distributions of actinides and fission products in the pyroprocess is discussed. The critical role of metal-phase activity coefficients, especially those of rare earth and the transuranic elements, is described. Measured separation factors, which are analogous to equilibrium constants but which involve concentrations rather than activities, are presented. The uses of thermodynamic calculations in process development are described, as are computer codes developed for calculating material flows and phase compositions in pyroprocessing.

Ackerman, J.P.; Johnson, T.R.

1993-10-01T23:59:59.000Z

214

Conference dates 1620 April 2012  

E-Print Network [OSTI]

Conference dates 16­20 April 2012 Location The Square Conference Centre Brussels, Belgium www/nanotechnologies Mark your Calendar #12;Conference dates 16­20 April 2012 The Square Conference Centre Brussels, Belgium success, Photonics Europe 2012 will again feature choice conferences and plenary presentations

Jahns, Jürgen

215

Feasibility Study of Supercritical Light Water Cooled Fast Reactors for Actinide Burning and Electric Power Production  

SciTech Connect (OSTI)

The use of supercritical temperature and pressure light water as the coolant in a direct-cycle nuclear reactor offers potential for considerable plant simplification and consequent capital and O&M cost reduction compared with current light water reactor (LWR) designs. Also, given the thermodynamic conditions of the coolant at the core outlet (i.e. temperature and pressure beyond the water critical point), very high thermal efficiencies of the power conversion cycle are possible (i.e. up to 46%). Because no change of phase occurs in the core, the need for steam separators and dryers as well as for BWR-type recirculation pumps is eliminated, which, for a given reactor power, results in a substantially shorter reactor vessel than the current BWRs. Furthermore, in a direct cycle the steam generators are not needed. If a tight fuel rod lattice is adopted, it is possible to significantly reduce the neutron moderation and attain fast neutron energy spectrum conditions. In this project a supercritical water reactor concept with a simple, blanket-free, pancake-shaped core will be developed. This type of core can make use of either fertile or fertile-free fuel and retain the hard spectrum to effectively burn plutonium and minor actinides from LWR spent fuel while efficiently generating electricity.

Mac Donald, Philip Elsworth; Buongiorno, Jacopo; Davis, Cliff Bybee; Weaver, Kevan Dean

2002-01-01T23:59:59.000Z

216

Phytosiderophore Effects on Subsurface Actinide Contaminants: Potential for Phytostabilization and Phytoextraction  

SciTech Connect (OSTI)

This project seeks to understand the influence of phytosiderophore-producing plants (grasses, including crops such as wheat and barley) on the biogeochemistry of actinide and other metal contaminants in the subsurface environment, and to determine the potential of phytosiderophore-producing plants for phytostabilization and phytoextraction of actinides and some metal soil contaminants. Phytosiderophores are secreted by graminaceous plants such as barley and wheat for the solubilization, mobilization and uptake of Fe and other essential nutrients from soils. The ability for these phytosiderophores to chelate and absorb actinides using the same uptake system as for Fe is being investigated though characterization of actinide-phytosiderophore complexes (independently of plants), and characterization of plant uptake of such complexes. We may also show possible harm caused by these plants through increased chelation of actinides that increase in actinide mobilization & migration in the subsurface environment. This information can then be directly applied by either removal of harmful plants, or can be used to develop plant-based soil stabilization/remediation technologies. Such technologies could be the low-cost, low risk solution to many DOE actinide contamination problems.

Ruggiero, Christy

2005-06-01T23:59:59.000Z

217

The Dirac equation in electronic structure calculations: Accurate evaluation of DFT predictions for actinides  

SciTech Connect (OSTI)

Brooks, Johansson, and Skriver, using the LMTO-ASA method and considerable insight, were able to explain many of the ground state properties of the actinides. In the many years since this work was done, electronic structure calculations of increasing sophistication have been applied to actinide elements and compounds, attempting to quantify the applicability of DFT to actinides and actinide compounds and to try to incorporate other methodologies (i.e. DMFT) into DFT calculations. Through these calculations, the limits of both available density functionals and ad hoc methodologies are starting to become clear. However, it has also become clear that approximations used to incorporate relativity are not adequate to provide rigorous tests of the underlying equations of DFT, not to mention ad hoc additions. In this talk, we describe the result of full-potential LMTO calculations for the elemental actinides, comparing results obtained with a full Dirac basis with those obtained from scalar-relativistic bases, with and without variational spin-orbit. This comparison shows that the scalar relativistic treatment of actinides does not have sufficient accuracy to provide a rigorous test of theory and that variational spin-orbit introduces uncontrolled errors in the results of electronic structure calculations on actinide elements.

Wills, John M [Los Alamos National Laboratory; Mattsson, Ann E [Sandia National Laboratories

2012-06-06T23:59:59.000Z

218

@HCSE2014 Contact: organizers@hcse-conference.org Web: hcse-conference.org International Conference on  

E-Print Network [OSTI]

@HCSE2014 Contact: organizers@hcse-conference.org Web: hcse-conference.org HCSE 2014 5th International Conference on Human-Centered Software Engineering Paderborn, Germany hcse-conference.org September 16-18, 2014 Call for Participation HCSE is a single-track working conference that brings together

Paderborn, Universität

219

UCLA's 2011 Queer Studies Conference  

E-Print Network [OSTI]

CSW QUEER STUDIES CONFERENCE upda te NOVEMBER 2011 UCLA’sCulture HE QUEER STUDIES CONFERENCE 2011 , a two-day eventThis focus gave the conference attendees a wide selection of

McLean, Lindsey

2011-01-01T23:59:59.000Z

220

Literature review of United States utilities computer codes for calculating actinide isotope content in irradiated fuel  

SciTech Connect (OSTI)

This paper reviews the accuracy and precision of methods used by United States electric utilities to determine the actinide isotopic and element content of irradiated fuel. After an extensive literature search, three key code suites were selected for review. Two suites of computer codes, CASMO and ARMP, are used for reactor physics calculations; the ORIGEN code is used for spent fuel calculations. They are also the most widely used codes in the nuclear industry throughout the world. Although none of these codes calculate actinide isotopics as their primary variables intended for safeguards applications, accurate calculation of actinide isotopic content is necessary to fulfill their function.

Horak, W.C.; Lu, Ming-Shih

1991-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Alaska BIA Providers Conference  

Broader source: Energy.gov [DOE]

The Alaska Bureau of Indian Affairs (BIA) is hosting the 24th Annual BIA Tribal Providers Conference in Anchorage, Alaska, Dec. 1-5, 2014.

222

AESP National Conference & Expo  

Broader source: Energy.gov [DOE]

The Association of Energy Services Professionals (AESP) is hosting its annual conference in Orlando, FL, on Feb. 9-12, 2015.

223

NACo Legislative Conference  

Broader source: Energy.gov [DOE]

The National Association of Counties (NACo) is hosting its annual conference in Washington, D.C., on Feb. 21-25, 2015.

224

APS 2003 Conferences  

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

conferences and workshops of interest to the APS researcher community. Frontiers of Grid Computing and Simulation at Nano-Bio Interface. (Feb. 27- Mar. 1) Baton Rouge, LA....

225

APS 2006 Conferences  

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

Laboratory Argonne, IL SRI 2006, The Ninth International Conference on Synchrotron Radiation Instrumentation (May 28 - June 3) Daegu, Exco, Korea EPICS Collaboration Meeting...

226

APS 1997 Conferences  

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

(Jul. 27- Aug. 01) San Diego, CA 6th International conference on Synchrotron Radiation Instrumentation (Aug. 4-8) Himeji, Hyogo, Japan Fifth International Workshop on...

227

DOE 2014 Biomass Conference  

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

2014 Biomass Conference Jim Williams Senior Manager American Petroleum Institute July 29, 2014 DRAFT 72814 Let's Agree with the Chicken Developing & Implementing Fuels & Vehicle...

228

2015 Open Science Conference  

Office of Energy Efficiency and Renewable Energy (EERE)

Purpose: The purpose of this conference is to bring the regional climate research community (from North Central region universities, DOI agencies, and other research institutions) and stakeholders ...

229

NLC Annual Conference  

Broader source: Energy.gov [DOE]

The National League of Cities (NLC) is hosting its annual Congressional City Conference in Washington, D.C., from March 7-11, 2015.

230

10th Annual Minnesota Pavement Conference  

E-Print Network [OSTI]

10th Annual Minnesota Pavement Conference: Session Summaries Conference Sponsors: Minnesota of Minnesota February 16, 2006 Continuing Education and Conference Center University of Minnesota St. Paul Campus #12;Conference Objective This one-day annual conference provides information to practitioners

Minnesota, University of

231

Fission cross section measurements of actinides at LANSCE  

SciTech Connect (OSTI)

Fission cross sections of a range of actinides have been measured at the Los Alamos Neutron Science Center (LANSCE) in support of nuclear energy applications. By combining measurement at two LANSCE facilities, Lujan Center and the Weapons Neutron Research center (WNR), differential cross sections can be measured from sub-thermal energies up to 200 MeV. Incident neutron energies are determined using the time-of-flight method, and parallel-plate ionization chambers are used to measure fission cross sections relative to the {sup 235}U standard. Recent measurements include the {sup 233,238}U, {sup 239,242}Pu and {sup 243}Am neutron-induced fission cross sections. In this paper preliminary results for cross section data of {sup 243}Am and {sup 233}U will be presented.

Tovesson, Fredrik [Los Alamos National Laboratory; Laptev, Alexander B [Los Alamos National Laboratory; Hill, Tony S [INL

2010-01-01T23:59:59.000Z

232

Delayed Neutron and Delayed Photon Characteristics from Photofission of Actinides  

SciTech Connect (OSTI)

Delayed neutron (DN) and delayed photon (DP) emissions from photofission reactions play an important role for applications involving nuclear material detection and characterization. To provide new, accurate, basic nuclear data for evaluations and data libraries, an experimental programme of DN and DP measurements has been undertaken for actinides with bremsstrahlung endpoint energy in the giant resonance region ({approx}15 MeV). In this paper, the experimental setup and the data analysis method will be described. Experimental results for DN and DP characteristics will be presented for {sup 232}Th, {sup 235,238}U, {sup 237}Np, and {sup 239}Pu. Finally, an example of an application to study the contents of nuclear waste packages will be briefly discussed.

Dore, D.; Berthoumieux, E.; Leprince, A.; Ridikas, D. [DSM/IRFUS/PhN, CEA/Saclay, Gif-sur-Yvette, F-91191 (France); Ledoux, X. [CEA/DAM/DIF, Arpajon, F-91297 (France); Agelou, M.; Carrel, F.; Gmar, M. [CEA, LIST, Gif-sur-Yvette, F-91191 (France)

2011-12-13T23:59:59.000Z

233

Surface energy and work function of the light actinides  

Science Journals Connector (OSTI)

We have calculated the surface energy and work function of the light actinides Fr, Ra, Ac, Th, Pa, U, Np, and Pu by means of a Green’s-function technique based on the linear-muffin-tin-orbitals method within the tight-binding representation. In these calculations we apply an energy functional which combines the kinetic energy calculated within the atomic-sphere approximation with Coulomb- and exchange-correlation-energy terms calculated by means of the complete nonspherically symmetric charge density derived from the atomic-sphere potential within nonoverlapping and space-filling cells. The calculated surface energies and work functions are in good agreement with the limited experimental data.

J. Kollár; L. Vitos; H. L. Skriver

1994-04-15T23:59:59.000Z

234

E-Print Network 3.0 - actinide-based complete-fusion reactions...  

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

fusion reactions. The yields of superheavies with Z > 118 are sensitive... physics. The cold Pb- and Bi-based 1 and hot actinide-based 2 complete fusion reactions were...

235

E-Print Network 3.0 - actinide elements volume Sample Search...  

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

no 5-6, Tome 33, Mai-Juin 1972,page C3-57 RELATIVISTIC ELECTRONIC BAND STRUCTURE OF THE HEAVY METALS Summary: and properties of the actinide elements before discussing the band...

236

Optimization of actinide transmutation in innovative lead-cooled fast reactors  

E-Print Network [OSTI]

The thesis investigates the potential of fertile free fast lead-cooled modular reactors as efficient incinerators of plutonium and minor actinides (MAs) for application to dedicated fuel cycles for transmutation. A methodology ...

Romano, Antonino, 1972-

2003-01-01T23:59:59.000Z

237

Extraction of actinides from simulated HLLW by DHDECMP-TBP/OK  

Science Journals Connector (OSTI)

The partitioning of actinides from simulated high level liquid waste (HLLW) originated from the Purex process has been studied using a mixture of dihexyl N,N-diethylcarbamoylmethyl-phosphonate (DHDECMP) and tr...

Ye Yu-xing; Hu Jin-xin; Huang Zi-lin…

2004-08-01T23:59:59.000Z

238

E-Print Network 3.0 - actinides solution chemistry Sample Search...  

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

solution chemistry Search Powered by Explorit Topic List Advanced Search Sample search results for: actinides solution chemistry Page: << < 1 2 3 4 5 > >> 1 www.emsl.pnl.gov...

239

Missouri Agriculture Outlook Conference  

E-Print Network [OSTI]

Missouri Agriculture Outlook Conference Conference Information Join us to discuss the drivers of Missouri agricultural and bio-fuels markets and participate in a special review of international policy implications for Missouri agriculture. Registration Deadline To guarantee space availability, please register

Noble, James S.

240

World Power Conference  

Science Journals Connector (OSTI)

... . J. T. BAKKER, chairman of the Netherlands National Committee of the World Power Conference, has agreed to become acting chairman of the International Executive Council of the ... , has agreed to become acting chairman of the International Executive Council of the Conference during the War. Correspondence intended for the International Executive Council should be addressed to ...

1939-11-04T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Conference on Industrial Physics  

Science Journals Connector (OSTI)

... THE first Conference on Industrial Physics to be held in Great Britain took place in Manchester under the ... auspices of the Institute of Physics on March 28-30. The subject chosen for the Conference was “Vacuum Devices in Research and Industry”, and its chief object was to ...

HERBERT R. LANG

1935-04-06T23:59:59.000Z

242

Conference on Atmospheric Pollution  

Science Journals Connector (OSTI)

... THE half-yearly Conference of representatives of local authorities and other organisations co-operating with the Department of Scientific ... of atmospheric pollution was held in the offices of the Department on May 25. The Conference received from Dr. G. M. B. Dobson, chairman of the Atmospheric Pollution ...

1936-05-30T23:59:59.000Z

243

The World Power Conference  

Science Journals Connector (OSTI)

... WE have received from the Central Office of the World Power Conference, Kingsway, London, the annual report for 1937. Dr. William F. Durand is ... president and Sir Harold Hartley is the chairman of the International Executive Council. The first conference was held in London in 1924, the second in Berlin in 1930 and the ...

1938-08-13T23:59:59.000Z

244

World Power Conference  

Science Journals Connector (OSTI)

... A TWO-DAY meeting of the International Executive Council of the World Power Conference has been held at Stockholm. Nineteen countries were represented : Australia, Austria, Belgium, ... of the International Executive Council and of the British National Committee of the World Power Conference, who presided ; Mr. Harold Hobson, vice-chairman of the British National Committee ...

1948-06-26T23:59:59.000Z

245

World Power Conference  

Science Journals Connector (OSTI)

... THE theme of the Canadian Sectional Meeting of the World Power Conference, to be held in Montreal during September 7-11, 1958, will be "Economic ... other application forms, can be obtained from the Secretary, British National Committee, World Power Conference, 201 Grand Buildings, Trafalgar Square, London, W.C.2. At the meeting ...

1958-05-03T23:59:59.000Z

246

Conference: Synergy Between Experiment  

E-Print Network [OSTI]

Kaxiras (Harvard) Synopsis ­ Society's ceaseless demand for clean, renewable energy resources on rapidly developing areas of nanoscale computation, will hold a conference on energy research, experimentAn NNIN/C Conference: Synergy Between Experiment and Computation in Energy ­ Looking to 2030. Yu

Heller, Eric

247

ICCK Conference Final Report  

SciTech Connect (OSTI)

The 7th International Conference on Chemical Kinetics (ICCK) was held July 10-14, 2011, at Massachusetts Institute of Technology (MIT), in Cambridge, MA, hosted by Prof. William H. Green of MITâ??s Chemical Engineering department. This cross-disciplinary meeting highlighted the importance of fundamental understanding of elementary reactions to the full range of chemical investigations. The specific conference focus was on elementary-step kinetics in both the gas phase and in condensed phase. The meeting provided a unique opportunity to discuss how the same reactive species and reaction motifs manifest under very different reaction conditions (e.g. atmospheric, aqueous, combustion, plasma, in nonaqueous solvents, on surfaces.). The conference featured special sessions on new/improved experimental techniques, improved models and data analysis for interpreting complicated kinetics, computational kinetics (especially rate estimates for large kinetic models), and a panel discussion on how the community should document/archive kinetic data. In the past, this conference had been limited to homogeneous gas-phase and liquid-phase systems. This conference included studies of heterogeneous kinetics which provide rate constants for, or insight into, elementary reaction steps. This Grant from DOE BES covered about half of the subsidies we provided to students and postdocs who attended the conference, by charging them reduced-rate registration fees. The complete list of subsidies provided are listed in Table 1 below. This DOE funding was essential to making the conference affordable to graduate students, and indeed the attendance at this conference was higher than at previous conferences in this series. Donations made by companies provided additional subsidies, leveraging the DOE funding. The conference was very effective in educating graduate students and important in fostering scientific interactions, particularly between scientists studying gas phase and liquid phase kinetics, since those two communities do not meet very often (it had been 6 years since the last time this conference had been held). The conference at MIT was so successful that European scientists decided to organize a similar conference (it will be held in Seville, Spain in July 2013). Almost 200 scientists participated, with more than 100 oral presentations and many poster presentations. A complete list of the presentations and their abstracts are given in the attachment. The conference led to many peer-reviewed papers published in several Special Issues of the International Journal of Chemical Kinetics in early 2012.

Green, William H. [MIT

2013-05-28T23:59:59.000Z

248

SRMS-5 Conference Contributions  

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

SRMS 5 logo SRMS 5 logo Fifth International Conference on Synchrotron Radiation in Materials Science SRMS-5 Conference Contributions Table of Contents and Program Introduction Welcome to the 5th International Conference on Synchrotron Radiation in Materials Science (SRMS-5). This conference, the latest in a series of international conferences that are held every two years, takes place at the Drake Hotel in Chicago from July 30 - August 2, 2006. It brings together leading edge researchers from around the world and is a celebration of the strong and increasingly important relationship between materials science and synchrotron radiation research. SRMS-5 takes place at a time when a large proportion of the scientific research at synchrotron user facilities is in materials science and

249

NETL Publications: Conference Proceedings  

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

Conference Proceedings Conference Proceedings Publications Conference Proceedings 2013 Aug 20-22 Carbon Storage R&D Project Review Meeting Aug 6-7 2013 NETL Workshop on Multiphase Flow Science July 23 14th Annual SECA Workshop July 8-11 NETL CO2 Capture Technology Meeting June 11-13 University Coal Research/Historically Black Colleges and Universities and other Minority Institutions Contractors Review Meeting 2012 Oct 2-4 2012 University Turbine Systems Research Workshop Aug 21-23 Carbon Storage R&D Project Review Meeting July 24-27 13th Annual SECA Workshop July 9-12 2012 NETL CO2 Capture Technology Meeting May 30-31 2012 University Coal Research/ Historically Black Colleges and Universities and Other Minority Institutions Contractors Review Conference April 17-19 The 26th Annual Conference on Fossil Energy Materials

250

Science Conference Proceedings : About  

Office of Scientific and Technical Information (OSTI)

About Science Conference Proceedings About Science Conference Proceedings The OSTI Science Conference Proceedings portal was devised to expedite access to conference papers and proceedings in various fields of science and technology. Emphasis is on U.S. conferences hosted and/or published by scientific and professional organizations whose areas of focus relate substantially to the Department of Energy's mission. Some information accessible through this site may have limitations on its use (including copyright) or contain terms and conditions. For information about these limitations, terms and conditions, refer to the specific organization. Documents from some sites may be available for purchase through an on-line shopping cart. The DOE's Office of Scientific and Technical Information (OSTI) provides

251

Extraction of trivalent lanthanides and actinides by ``CMPO-like`` calixarenes  

SciTech Connect (OSTI)

Extractive properties of calix[4]arenes bearing carbamoylmethylphosphine oxide moieties on their upper rim toward trivalent lanthanide and actinide cations were investigated. The study revealed that these molecules selectively extract light lanthanides and actinides from heavy lanthanides. All parameters present in the extraction system were varied to determine the origin of the selectivity. It was found that this selectivity requires a calix[4]arene platform and acetamidophosphine oxide groups containing phenyl substituents on the four phosphorus atoms.

Delmau, L.H.; Simon, N. [CEA Cadarache, St. Paul lez Durance (France)] [CEA Cadarache, St. Paul lez Durance (France); Schwing-Weill, M.J. [ECPM, Strasbourg (France)] [and others] [ECPM, Strasbourg (France); and others

1999-04-01T23:59:59.000Z

252

CONFERENCE REGISTRATION FORM TO REGISTER FOR THE CONFERENCE  

E-Print Network [OSTI]

CONFERENCE REGISTRATION FORM TO REGISTER FOR THE CONFERENCE: EITHER Fill in the information below to the address indicated. OR Register online using your credit card at www.mcgill.ca/continuingstudies/programs-and-courses/mcll/conference and Plan for the Next Generation WEDNESDAY, AUGUST 20, 2014 #12;CONFERENCE FEE: The fee includes lunch

Kambhampati, Patanjali

253

Conference Services Update Need to revamp conference handling at SLAC  

E-Print Network [OSTI]

Conference Services Update #12;2 Need to revamp conference handling at SLAC · No guidelines on how conferences should be handled leads to lack of uniformity, consistency · No way to plan for number of conferences to be handled centrally each year ­ lack of guidelines does not allow for proper planning · Many

Wechsler, Risa H.

254

Attending a Conference? Bringing in Speakers for a Conference?  

E-Print Network [OSTI]

Traveling? Attending a Conference? Bringing in Speakers for a Conference? PEAC has money available for travel, conference fees, or other professional development activities. Funds are now awarded-Mail: Telephone: Title of Conference/meeting/activity: Date and Location of activity: Proposed Budget: Tier 1

Thomas, Andrew

255

Factors influencing the transport of actinides in the groundwater environment. Final report  

SciTech Connect (OSTI)

This report summarizes investigations of factors that significantly influence the transport of actinide cations in the groundwater environment. Briefly, measurements of diffusion coefficients for Am(III), Cm(III), and Np(V) in moist US soils indicated that diffusion is negligible compared to mass transport in flowing groundwater. Diffusion coefficients do, however, indicate that, in the absence of flowing water, actinide elements will migrate only a few centimeters in a thousand years. The remaining investigations were devoted to the determination of distribution ratios (K/sub d/s) for representative US soils, factors influencing them, and chemical and physical processes related to transport of actinides in groundwaters. The computer code GARD was modified to include complex formation to test the importance of humic acid complexing on the rate of transport of actinides in groundwaters. Use of the formation constant and a range of humic acid, even at rather low concentrations of 10/sup -5/ to 10/sup -6/ molar, significantly increases the actinide transport rate in a flowing aquifer. These computer calculations show that any strong complexing agent will have a similar effect on actinide transport in the groundwater environment. 32 references, 9 figures.

Sheppard, J.C.; Kittrick, J.A.

1983-07-31T23:59:59.000Z

256

BSTBacterial Source Tracking Conference Proceedings  

E-Print Network [OSTI]

BSTBacterial Source Tracking Conference Proceedings 2012 Bacterial Source Tracking State Conference Conference Proceedings Prepared by: Lucas Gregory, Texas Water Resources Institute Courtney Smith of the Science Conference Texas Water Resources Institute TR-427 June 2012 #12;#12;Texas Water Resources

257

Americium separation from nuclear fuel dissolution using higher oxidation states.  

SciTech Connect (OSTI)

Much of the complexity in current AFCI proposals is driven by the need to separate the minor actinides from the lanthanides. Partitioning and recycling Am, but not Cm, would allow for significant simplification because Am has redox chemistry that may be exploited while Cm does not. Here, we have explored methods based on higher oxidation states of Am (AmV and AmVI) to partition Am from the lanthanides. In a separate but related approach we have also initiated an investigation of the utility of TRUEX Am extraction from thiocyanate solution. The stripping of loaded TRUEX by Am oxidation or SCN- has not yet proved successful; however, the partitioning of inextractable AmV by TRUEX shows promise.

Bruce J. Mincher

2009-09-01T23:59:59.000Z

258

The Dearborn Conference  

Science Journals Connector (OSTI)

The Dearborn Conference ... INITIATED by the Chemical Foundation, Inc., and held under the joint auspices of the president of the American Farm Bureau Federation, the master of the National Grange, the president of the Chemical Foundation, Inc., and the chairman of the National Agricultural Conference, agriculture, industry, and science through representatives met at Dearborn, Mich., May 7 and 8. ... The chairman of the Committee on Arrangements, Carl B. Fritsche, and his staff carefully prepared all details, and the conference, with over two hundred in attendance, included many important in agriculture, in the various industries, in science, and in the organizations representing these interests. ...

1935-05-20T23:59:59.000Z

259

Biomass 2010 Conference Agenda | Department of Energy  

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

0 Conference Agenda Biomass 2010 Conference Agenda Biomass 2010 Conference Agenda bio2010fullagenda.pdf More Documents & Publications QTR Cornerstone Workshop Agenda 2014 Biomass...

260

2012 Environmental Justice Conference and Training Program |...  

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

2012 Environmental Justice Conference and Training Program 2012 Environmental Justice Conference and Training Program 2012 Environmental Justice Conference and Training Program...

Note: This page contains sample records for the topic "actinide separations conference" 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

The Joint Actinide Shock Physics Experimental Research Facility at the Nevada National Security Site, OAS-L-12-05  

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

Joint Actinide Shock Physics Joint Actinide Shock Physics Experimental Research Facility at the Nevada National Security Site OAS-L-12-05 April 2012 Department of Energy Washington, DC 20585 April 23, 2012 MEMORANDUM FOR THE MANAGER, NEVADA SITE OFFICE FROM: David Sedillo, Director Western Audits Division Office of Inspector General SUBJECT: INFORMATION: Audit Report on "The Joint Actinide Shock Physics Experimental Research Facility at the Nevada National Security Site" BACKGROUND The Department of Energy, National Nuclear Security Administration's, Joint Actinide Shock Physics Experimental Research (JASPER) facility plays an integral role in the certification of the Nation's nuclear weapons stockpile by providing a method to generate and measure data

262

Method for fluorination of actinide fluorides and oxyfluorides using O/sub 2/F/sub 2/  

DOE Patents [OSTI]

The present invention relates generally to methods of fluorination and more particularly to the use of O/sub 2/F/sub 2/ for the preparation of actinide hexafluorides, and for the extraction of deposited actinides and fluorides and oxyfluorides thereof from reaction vessels. The experiments set forth hereinabove demonstrate that the room temperature or below use of O/sub 2/F/sub 2/ will be highly beneficial for the preparation of pure actinide hexafluorides from their respective tetrafluorides without traces of HF being present as occurs using other fluorinating agents: and decontamination of equipment previously exposed to actinides: e.g., walls, feed lines, etc.

Eller, P.G.; Malm, J.G.; Penneman, R.A.

1984-08-01T23:59:59.000Z

263

Enhancing VVER Annular Proliferation Resistance Fuel with Minor Actinides  

SciTech Connect (OSTI)

Key aspects of the Global Nuclear Energy Partnership (GNEP) are to significantly advance the science and technology of nuclear energy systems and the Advanced Fuel Cycle (AFC) program. The merits of nuclear energy are the high-density energy, and low environmental impacts i.e. almost zero greenhouse gas emission. Planned efforts involve near-term and intermediate-term improvements in fuel utilization and recycling in current LWR as well as the longer-term development of new nuclear energy systems that offer much improved fuel utilization and proliferation resistance, along with continued advances in operational safety. The challenges are solving the energy needs of the world, protection against nuclear proliferation, the problem of nuclear waste, and the global environmental problem. To reduce the spent fuel for storage and enhance the proliferation resistance for the intermediate-term, there are two major approaches (a) increase the discharged spent fuel burnup in the advanced LWR (Gen-III Plus), which not only can reduce the spent fuel for storage, but also increase the 238Pu and 240Pu isotopes ratio to enhance the proliferation resistance, (b) use of transuranic nuclides (237Np and 241Am) in the high burnup fuel, which can drastically increase the proliferation resistance isotope 238Pu /Pu ratio. For future advanced nuclear systems, the minor actinides are viewed more as a resource to be recycled, or transmuted to less hazardous and possibly more useful forms, rather than simply as a waste stream to be disposed of in expensive repository facilities. In this paper, a typical pressurized water reactor (PWR) VVER-1000 annular fuel unit lattice cell model with UO2 fuel pins will be used to investigate the effectiveness of minor actinide reduction approach (MARA) for enhancing proliferation resistance and improving the fuel cycle performance. We concluded that the concept of MARA, involves the use of transuranic nuclides (237Np and/or 241Am), can not only drastically increase the 238Pu/Pu ratio for proliferation resistance, but also can serve as a burnable absorber to hold-down the initial excess reactivity. It is believed that MARA can play an important role in atoms for peace and the intermediate term of nuclear energy reconnaissance.

G. S. Chang

2007-06-01T23:59:59.000Z

264

Alaska Rural Energy Conference  

Broader source: Energy.gov [DOE]

The Alaska Rural Energy Conference is a three-day event offering a large variety of technical sessions covering new and ongoing energy projects in Alaska, as well as new technologies and needs for...

265

DOE 2014 Biomass Conference  

Broader source: Energy.gov [DOE]

Breakout Session 1C—Fostering Technology Adoption I: Building the Market for Renewables with High Octane Fuels DOE 2014 Biomass Conference Jim Williams, Senior Manager, American Petroleum Institute

266

AISES National Conference  

Office of Energy Efficiency and Renewable Energy (EERE)

The AISES National Conference is a one-of-a-kind, three day event convening graduate, undergraduate, and high school junior and senior students, teachers, workforce professionals, corporate and...

267

Indian Housing Training Conference  

Broader source: Energy.gov [DOE]

This four-day conference will provide housing professionals with the tools to maintain good homes, build affordable homes, improve public safety, and provide essential building blocks to a healthy...

268

2015 Information Management Conference  

Broader source: Energy.gov [DOE]

The 34th Information Management Conference (IMC) sponsored by the Office of the Chief Information Officer (OCIO) will be held at the Gaylord Opryland Convention Center in Nashville, TN, June 15-18,...

269

Information Management Conference  

Broader source: Energy.gov [DOE]

The 34th Information Management Conference (IMC) sponsored by the Office of the Chief Information Officer (OCIO) will be held at the Gaylord Opryland Convention Center in Nashville, TN, June 15-18,...

270

Climate Leadership Conference  

Office of Energy Efficiency and Renewable Energy (EERE)

The Climate Leadership Conference is your annual exchange for addressing global climate change through policy, innovation, and business solutions. Forward-thinking lead­ers from busi­ness, gov­ern...

271

GIS TRANSFORMATIONS Conference Presentation  

E-Print Network [OSTI]

GIS TRANSFORMATIONS Conference Presentation Waldo Tobler Geography Department University, line, area, or field phenomena, then the sixteen common classes of transformation are: point -> point (scalar, vector, tensor) data, to obtain eighty distinct possible classes of transformation. The common

Tobler, Waldo

272

Chemical Research Conferences, 1947  

Science Journals Connector (OSTI)

...I. A. Denison, "Underground Corrosion"; R. B...Cathodic Protection of Underground Structures by Means...Starkey, "Bacteria and Underground Cor-rosion." MEDICINAL...Tuberculosis. The speakers and titles on the Conference...

W. George Parks

1947-03-14T23:59:59.000Z

273

2011 IAEA General Conference  

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

2011 IAEA General Conference 2011 IAEA General Conference Remarks as Prepared for Delivery Secretary Steven Chu Monday, September 19, 2011 Thank you, Ambassador Feruta. Congratulations on your election as President of this Conference. I also want to thank Director General Amano for his outstanding leadership. I am honored to represent the United States today, and I want to share a message from President Barack Obama: "On behalf of the United States, please accept my best wishes for a successful International Atomic Energy Agency General Conference. This year's meeting takes place against the backdrop of the severe earthquake and tsunami that struck Japan in March and the devastating accident at the Fukushima Daiichi Nuclear Power Station that followed. Along with

274

Laser ablation of silicate glasses doped with transuranic actinides  

SciTech Connect (OSTI)

Direct sampling laser ablation plasma mass spectrometry (DS-LAMS) was applied to silica glasses doped with {sup 237}Np, {sup 242}Pu or {sup 241}Am using a unique instrument recently installed into a transuranic glovebox. The primary goal was to assess the utility of mass spectrometry of directly ablated ions for facile evaluation of actinide (An) constituents of silicate glass immobilization matrices used for encapsulation of radionuclides. The instrument and general procedures have been described elsewhere. Three high-purity silicate glasses prepared by a sol-gel process (SG) and one conventional high-temperature (HT; melting point {approx} 1,450 C) borosilicate glass were studied. These glasses comprised the following constituents, with compositions expressed in mass percentages: Np-HT {approx} 30% SiO{sub 2} + 6% B{sub 2}O{sub 3} + 3% BaO + 13% Al{sub 2}O{sub 3} + 10% PbO + 30% La{sub 2}O{sub 3} + 8% {sup 237}NpO{sub 2}; Np-SG {approx} 70% SiO{sub 2} + 30% {sup 237}NpO{sub 2}; Pu-SG {approx} 70% SiO{sub 2} + 30% {sup 242}PuO{sub 2}; Am-SG {approx} 85% SiO{sub 2} + 15% {sup 241}AmO{sub 2}.

Gibson, J.K.; Haire, R.G.

1998-10-01T23:59:59.000Z

275

EXAFS studies of sodium silicate glasses containing dissolved actinides  

SciTech Connect (OSTI)

Sodium silicate glasses containing dissolved Th, U, Np, and Pu have been studied using the EXAFS technique. Th/sup 4 +/, U/sup 4 +/, Np/sup 4 +/, and Pu/sup 4 +/ ions in the silicate glasses are 8-fold coordinated to oxygen neighbors. The higher valent U/sup 6 +/ and Np/sup 5 +/ ions have complex local symmetries. The U/sup 6 +/ ions appear in a uranyl configuration with 2 oxygen atoms at 1.85A and 4 at 2.25A from the U ion. The Np/sup 5 +/ local symmetry is more complex and difficult to determine uniquely. The U/sup 6 +/ glasses show substantial clustering of the uranium atoms. A structural model, with nearly planar uranyl sheets sandwiched between alkali and silica layers, is used to explain the U/sup 6 +/ EXAFS data. This model allows us to understand why U/sup 6 +/ ions are much more soluble in the glasses than the actinide 4/sup +/ ions. 4 references, 2 figures.

Knapp, G.S.; Veal, B.W.; Paulikas, A.P.; Mitchell, A.W.; Lam, D.J.; Klippert, T.E.

1984-07-01T23:59:59.000Z

276

Actinide recycle potential in the IFR (Integral Fast Reactor)  

SciTech Connect (OSTI)

Rising concern about the greenhouse effect reinforces the need to reexamine the question of a next-generation reactor concept that can contribute significantly toward substitution for fossil-based energy generation. Even with only the nuclear capacity on-line today, world-wide reasonably assured uranium resources would last for only about 50 years. If nuclear is to make a significant contribution, breeding is a fundamental requirement. Uranium resources can then be extended by two orders of magnitude, making nuclear essentially a renewable energy source. The key technical elements of the IFR concept are metallic fuel and fuel cycle technology based on pyroprocessing. Pyroprocessing is radically different from the conventional PUREX reprocessing developed for the LWR oxide fuel. Chemical feasibility of pyroprocessing has been demonstrated. The next major step in the IFR development program will be the full-scale pyroprocessing demonstration to be carried out in conjunction with EBR-II. IFR fuel cycle closure based on pyroprocessing can also have a dramatic impact on the waste management options, and in particular on the actinide recycling. 6 figs.

Chang, Y.I.

1989-01-01T23:59:59.000Z

277

Development and Testing of an Americium/Lanthanide Separation Flowsheet Using Sodium Bismuthate  

SciTech Connect (OSTI)

The separation of Am from the lanthanides and curium is a key step in proposed advanced fuel cycle scenarios. The partitioning and transmutation of Am is desirable to minimize the long-term heat load of material interred in a future high-level waste repository. A separation process amenable to process scale-up remains elusive. Given only subtle chemistry differences within and between the ions of the trivalent actinide and lanthanide series this separation is challenging ; however, higher oxidation states of americium can be prepared using sodium bismuthate and separated via solvent extraction using diamylamylphosphonate (DAAP) extraction. Among the other trivalent metals only Ce is also oxidized and extracted. Due to the long-term instability of Am(VI) , the loaded organic phase is readily selectively stripped to partition the actinide to a new acidic aqueous phase. Batch extraction distribution ratio measurements were used to design a flowsheet to accomplish this separation. Additionally, crossflow filtration was investigated as a method to filter the bismuthate solids from the feed solution prior to extraction. Results of the filtration studies, flowsheet development work and flowsheet performance testing using a centrifugal contactor are detailed.

Jack Law; Bruce Mincher; Troy Garn; Mitchell Greenhalgh; Nicholas Schmitt; Veronica Rutledge

2014-04-01T23:59:59.000Z

278

Proceedings of the Nineteenth DOE Solar Photochemistry Research Conference  

SciTech Connect (OSTI)

This document is a compilation of reports presented at the Nineteenth DOE Solar Photochemistry Research Conference. Sessions included photophysical properties of transition metal complexes, cage effects on photochemistry, charge transfer, photo-induced charge separation in biomimetic molecules, photosynthesis, and electron transfer.

NONE

1995-07-01T23:59:59.000Z

279

MOLECULAR SPECTROSCPY AND REACTIONS OF ACTINIDES IN THE GAS PHASE AND CRYOGENIC MATRICES  

SciTech Connect (OSTI)

In this chapter we review the spectroscopic data for actinide molecules and the reaction dynamics for atomic and molecular actinides that have been examined in the gas phase or in inert cryogenic matrices. The motivation for this type of investigation is that physical properties and reactions can be studied in the absence of external perturbations (gas phase) or under minimally perturbing conditions (cryogenic matrices). This information can be compared directly with the results from high-level theoretical models. The interplay between experiment and theory is critically important for advancing our understanding of actinide chemistry. For example, elucidation of the role of the 5f electrons in bonding and reactivity can only be achieved through the application of experimentally verified theoretical models. Theoretical calculations for the actinides are challenging due the large numbers of electrons that must be treated explicitly and the presence of strong relativistic effects. This topic has been reviewed in depth in Chapter 17 of this series. One of the goals of the experimental work described in this chapter has been to provide benchmark data that can be used to evaluate both empirical and ab initio theoretical models. While gas-phase data are the most suitable for comparison with theoretical calculations, there are technical difficulties entailed in generating workable densities of gas-phase actinide molecules that have limited the range of species that have been characterized. Many of the compounds of interest are refractory, and problems associated with the use of high temperature vapors have complicated measurements of spectra, ionization energies, and reactions. One approach that has proved to be especially valuable in overcoming this difficulty has been the use of pulsed laser ablation to generate plumes of vapor from refractory actinide-containing materials. The vapor is entrained in an inert gas, which can be used to cool the actinide species to room temperature or below. For many spectroscopic measurements, low temperatures have been achieved by co-condensing the actinide vapor in rare gas or inert molecule host matrices. Spectra recorded in matrices are usually considered to be minimally perturbed. Trapping the products from gas-phase reactions that occur when trace quantities of reactants are added to the inert host gas has resulted in the discovery of many new actinide species. Selected aspects of the matrix isolation data were discussed in chapter 17. In the present chapter we review the spectroscopic matrix data in terms of its relationship to gas-phase measurements, and update the description of the new reaction products found in matrices to reflect the developments that have occurred during the past two years. Spectra recorded in matrix environments are usually considered to be minimally perturbed, and this expectation is borne out for many closed shell actinide molecules. However, there is growing evidence that significant perturbations can occur for open shell molecules, resulting in geometric distortions and/or electronic state reordering. Studies of actinide reactions in the gas phase provide an opportunity to probe the relationship between electronic structure and reactivity. Much of this work has focused on the reactions of ionic species, as these may be selected and controlled using various forms of mass spectrometry. As an example of the type of insight derived from reaction studies, it has been established that the reaction barriers for An+ ions are determined by the promotion energies required to achieve the 5fn6d7s configuration. Gas-phase reaction studies also provide fundamental thermodynamic properties such as bond dissociation and ionization energies. In recent years, an increased number of gas-phase ion chemistry studies of bare (atomic) and ligated (molecular) actinide ions have appeared, in which relevant contributions to fundamental actinide chemistry have been made. These studies were initiated in the 1970's and carried out in an uninterrupted way over the course of the past three d

Heaven, Michael C.; Gibson, John K.; Marcalo, Joaquim

2009-02-01T23:59:59.000Z

280

Technical requirements for the actinide source-term waste test program  

SciTech Connect (OSTI)

This document defines the technical requirements for a test program designed to measure time-dependent concentrations of actinide elements from contact-handled transuranic (CH TRU) waste immersed in brines similar to those found in the underground workings of the Waste Isolation Pilot Plant (WIPP). This test program wig determine the influences of TRU waste constituents on the concentrations of dissolved and suspended actinides relevant to the performance of the WIPP. These influences (which include pH, Eh, complexing agents, sorbent phases, and colloidal particles) can affect solubilities and colloidal mobilization of actinides. The test concept involves fully inundating several TRU waste types with simulated WIPP brines in sealed containers and monitoring the concentrations of actinide species in the leachate as a function of time. The results from this program will be used to test numeric models of actinide concentrations derived from laboratory studies. The model is required for WIPP performance assessment with respect to the Environmental Protection Agency`s 40 CFR Part 191B.

Phillips, M.L.F.; Molecke, M.A.

1993-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Extraction of actinide (III, IV, V, VI) ions and TcO4- byN,N,N',N'- tetraisobutyl-3-oxa-glutaramide  

SciTech Connect (OSTI)

The extraction behavior of U(VI), Np(V), Pu(IV), Am(III), and TcO{sub 4}{sup -} with N, N, N', N'-tetraisobutyl-3-oxa-glutaramide (TiBOGA) were investigated. An organic phase of 0.2 mol/L TiBOGA in 40/60% (V/V) 1-octanol/kerosene showed good extractability for actinides (III, IV, V VI) and TcO{sub 4}{sup -}from aqueous solutions of HNO{sub 3} (0.1 to 4 mol/L). At 25 C, the distribution ratio of the actinide ions (D{sub An}) generally increased as the concentration of HNO{sub 3} in the aqueous phase was increased from 0.1 to 4 mol/L, while the D{sub Tc} at first increased, then decreased, with a maximum of 3.0 at 2 mol/L HNO{sub 3}. Based on the slope analysis of the dependence of D{sub M} (M = An or Tc) on the concentrations of reagents, the formula of extracted complexes were assumed to be UO{sub 2}L{sub 2}(NO{sub 3}){sub 2}, NpO{sub 2}L{sub 2}(NO{sub 3}), PuL(NO{sub 3}){sub 4}, AmL{sub 3}(NO{sub 3}){sub 3}, and HL{sub 2}(TcO{sub 4}) where L = TiBOGA. The enthalpy and entropy of the corresponding extraction reactions, {Delta}{sub r}H and {Delta}{sub r}S, were calculated from the dependence of D on temperature in the range of 15-55 C. For U(VI), Np(V), Am(III) and TcO{sub 4}{sup -}, the extraction reactions are enthalpy driven and disfavored by entropy ({Delta}{sub r}H < 0 and {Delta}{sub r}S < 0). In contrast, the extraction reaction of Pu(IV) is entropy driven and disfavored by enthalpy ({Delta}{sub r}H > 0 and {Delta}{sub r}S > 0). A test run with 0.2 mol/L TiBOGA in 40/60% 1-octanol/kerosene was performed to separate actinides and TcO{sub 4}{sup -} from a simulated acidic high-level liquid waste (HLLW), using tracer amounts of {sup 238}U(VI), {sup 237}Np(V), {sup 239}Pu(VI), {sup 241}Am(III) and {sup 99}TcO{sub 4}{sup -}. The distribution ratios of U(VI), Np(V), Pu(VI), Am(III) and TcO{sub 4}{sup -} were 12.4, 3.9, 87, > 1000 and 1.5, respectively, confirming that TiBOGA is a promising extractant for the separation of all actinides and TcO{sub 4}{sup -} from acidic HLLW. It is noteworthy that the extractability of TiBOGA for Np(V) from acidic HLLW (D{sub Np(V)} = 3.9) is much higher than that of many other extractants that have been studies for the separation of actinides from HLLW.

Tian, Guoxin; Zhang, Ping; Wang, Jianchen; Rao, Linfeng

2005-05-01T23:59:59.000Z

282

Young Women's Conference in Science, Technology, Engineering...  

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

Programs Young Women's Conference in Science, Technology, Engineering & Mathematics The Young Women's Conference in Science, Technology, Engineering, and Mathematics introduces...

283

Recovery of minor actinides from spent fuel using TPEN-immobilized gels  

SciTech Connect (OSTI)

A series of separation experiments was performed in order to study the recovery process for minor actinides (MAs), such as americium (Am) and curium (Cm), from the actual spent fuel by using an extraction chromatographic technique. N,N,N',N'-tetrakis-(4-propenyloxy-2-pyridylmethyl) ethylenediamine (TPPEN) is an N,N,N',N'-tetrakis (2-pyridylmethyl) ethylenediamine (TPEN) analogue consisting of an incorporated pyridine ring that acts as not only a ligand but also as a site for polymerization and crosslinking of the gel. The TPPEN and N-isopropylacrylamide (NIPA) were dissolved into dimethylformamide (DMF, Wako Co., Ltd.) and a silica beads polymer, and then TTPEN was immobilized chemically in a polymer gel (so called TPEN-gel). Mixed oxide (MOX) fuel, which was highly irradiated up to 119 GWD/MTM in the experimental fast reactor Joyo, was used as a reference spent fuel. First, uranium (U) and plutonium (Pu) were separated from the irradiated fuel using an ion-exchange method, and then, the platinum group elements were removed by CMPO to leave a mixed solution of MAs and lanthanides. The 3 mol% TPPEN-gel was packed with as an extraction column (CV: 1 ml) and then rinsed by 0.1 M NaNO{sub 3}(pH 4.0) for pH adjustment. After washing the column by 0.01 M NaNO{sub 3} (pH 4.0), Eu was detected and the recovery rate reached 93%. The MAs were then recovered by changing the eluent to 0.01 M NaNO{sub 3} (pH 2.0), and the recovery rate of Am was 48 %. The 10 mol% TPPEN-gel was used to improve adsorption coefficient of Am and a condition of eluent temperature was changed in order to confirm the temperature swing effect on TPEN-gel for MA. More than 90% Eu was detected in the eluent after washing with 0.01 M NaNO{sub 3} (pH 3.5) at 5 Celsius degrees. Americium was backwardly detected and eluted continuously during the same condition. After removal of Eu, the eluent temperature was changed to 32 Celsius degrees, then Am was detected (pH 3.0). Finally remained Am could be stripped from TPPEN-gel by changing the pH of the eluent to 2.0. These results These results prove that the proposed recovery process for MAs is a potential candidate for future reprocessing methods based on the extraction chromatographic technique. (authors)

Koyama, S.; Suto, M.; Ohbayashi, H. [Oarai Research and Development Center, Japan Atomic Energy Agency, Oarai (Japan); Oaki, H. [Solutions Research Organization, Tokyo Institute of Technology, Tokyo (Japan); Takeshita, K. [Research Laboratory for Nuclear Reactors, Tokyo Institute of Technology, Tokyo (Japan)

2013-07-01T23:59:59.000Z

284

Selective separation of europium using polymer-enhanced ultrafiltration  

SciTech Connect (OSTI)

The U.S. Department of energy (DOE) is actively pursuing new and improved separation techniques for the cleanup of past nuclear defense production sites. Research and production activites at DOE`s Hanford Site in Richland, Wash., have created large volumes of waste streams containing hazardous and toxic chemicals along with radioactive materials. Many of these wastes will require processing for segregation into high-level, transuranic, and/or low-level waste for permanent disposal. A process to selectively remove actinides, such as americium, from liquid radioactive waste was investigated for potential use at Hanford and other contaminated DOE sites. The objective of this research was to determine the effectiveness of polymer binding followed by ultrafiltration for removal of europium (Eu), a nonradioactive surrogate for trivalent actinides such as americium. A commercially available polyacrylic acid (PAA) and a Pacific Northwest Laboratory (PNL) synthesized copolymer were tested. Both polymers significantly increased Eu removal. A cation exchange mechanism was implied by examination of the Eu-to-RCO{sub 2}{sup -} functional groups that comprise the acrylic acid monomer. The weight ratios of Eu-to-polymer needed to achieve 85% rejection of Eu were 1:6 for PAA and 1:10 for the PNL copolymer. Addition of sodium to the feed solution at a concentration three orders of magnitude greater than Eu did not adversely affect rejection of Eu. 12 refs., 12 figs., 4 tabs.

Norton, M.V. [Gray & Osborne, Inc., Seattle, WA (United States); Digiano, F.A. [Univ. of North Carolina, Chapel Hill, NC (United States); Hallen, R.T. [Pacific Northwest Lab., Richland, WA (United States)

1997-03-01T23:59:59.000Z

285

Fusion Techniques for the Oxidation of Refractory Actinide Oxides  

SciTech Connect (OSTI)

Small-scale experiments were performed to demonstrate the feasibility of fusing refractory actinide oxides with a series of materials commonly used to decompose minerals, glasses, and other refractories as a pretreatment to dissolution and subsequent recovery operations. In these experiments, 1-2 g of plutonium or neptunium oxide (PuO2 or NpO2) were calcined at 900 degrees Celsius, mixed and heated with the fusing reagent(s), and dissolved. For refractory PuO2, the most effective material tested was a lithium carbonate (Li2CO3)/sodium tetraborate (Na2B4O7) mixture which aided in the recovery of 90 percent of the plutonium. The fused product was identified as a lithium plutonate (Li3PuO4) by x-ray diffraction. The use of a Li2CO3/Na2B4O7 mixture to solubilize high-fired NpO2 was not as effective as demonstrated for refractory PuO2. In a small-scale experiment, 25 percent of the NpO2 was oxidized to a neptunium (VI) species that dissolved in nitric acid. The remaining neptunium was then easily recovered from the residue by fusing with sodium peroxide (Na2O2). Approximately 70 percent of the neptunium dissolved in water to yield a basic solution of neptunium (VII). The remainder was recovered as a neptunium (VI) solution by dissolving the residue in 8M nitric acid. In subsequent experiments with Na2O2, the ratio of neptunium (VII) to (VI) was shown to be a function of the fusion temperature, with higher temperatures (greater than approximately 400 degrees C) favoring the formation of neptunium (VII). The fusion of an actual plutonium-containing residue with Na2O2 and subsequent dissolution was performed to demonstrate the feasibility of a pretreatment process on a larger scale. Sodium peroxide was chosen due to the potential of achieving higher actinide recoveries from refractory materials. In this experiment, nominally 10 g of a graphite-containing residue generated during plutonium casting operations was initially calcined to remove the graphite. Removal of combustible material prior to a large-scale fusion with Na2O2 is needed due to the large amount of heat liberated during oxidation. Two successive fusions using the residue from the calcination and the residue generated from the initial dissolution allowed recovery of 98 percent of the plutonium. The fusion of the residue following the first dissolution was performed at a higher temperature (600 degrees Celsius versus 450 degrees Celsius during the first fusion). The ability to recover most of the remaining plutonium from the residue suggest the oxidation efficiency of the Na2O2 fusion improves with higher temperatures similar to results observed with NpO2 fusion.

Rudisill, T.S.

1999-04-15T23:59:59.000Z

286

Final Project Report INERT-MATRIX FUEL: ACTINIDE "BURNING" AND DIRECT DISPOSAL  

Office of Scientific and Technical Information (OSTI)

Project Report Project Report INERT-MATRIX FUEL: ACTINIDE "BURNING" AND DIRECT DISPOSAL Nuclear Engineering Education Research Program (grant # DE-FG07-99ID13767) Rodney C. Ewing (co-PI) Lumin Wang (co-PI) October 30,2002 For the Period of 07/01/1999 to 06/30/2002 Department of Nuclear Engineering and Radiological Sciences University of Michigan Ann Arbor, MI 48109 1 1. Background Excess actinides result from the dismantlement of nuclear weapons (239Pu) and the reprocessing of commercial spent nuclear fuel (mainly 241Am, Cm and 237Np). In Europe, Canada and Japan studies have determined much improved efficiencies for burn- up of actinides using inert-matrix fuels. This innovative approach also considers the properties of the inert-matrix fuel as a nuclear waste form for direct disposal after one-

287

The Conference Venue Hohenwart Forum is a small conference  

E-Print Network [OSTI]

Karlsruhe A 8 Pforzheim Stuttgart Huchenfeld Calw Hohenwart The Conference Venue Hohenwart Forum is a small conference center in the Northern Black Forest, about 12 kilometers south of Pforzheim. The ve- nue offers several conference rooms, and about 80 single and double bedrooms. A restaurant provides

Timmer, Jens

288

Minor Actinides Loading Optimization for Proliferation Resistant Fuel Design - BWR  

SciTech Connect (OSTI)

One approach to address the United States Nuclear Power (NP) 2010 program for the advanced light water reactor (LWR) (Gen-III+) intermediate-term spent fuel disposal need is to reduce spent fuel storage volume while enhancing proliferation resistance. One proposed solution includes increasing burnup of the discharged spent fuel and mixing minor actinide (MA) transuranic nuclides (237Np and 241Am) in the high burnup fuel. Thus, we can reduce the spent fuel volume while increasing the proliferation resistance by increasing the isotopic ratio of 238Pu/Pu. For future advanced nuclear systems, MAs are viewed more as a resource to be recycled, and transmuted to less hazardous and possibly more useful forms, rather than simply disposed of as a waste stream in an expensive repository facility. MAs play a much larger part in the design of advanced systems and fuel cycles, not only as additional sources of useful energy, but also as direct contributors to the reactivity control of the systems into which they are incorporated. A typical boiling water reactor (BWR) fuel unit lattice cell model with UO2 fuel pins will be used to investigate the effectiveness of adding MAs (237Np and/or 241Am) to enhance proliferation resistance and improve fuel cycle performance for the intermediate-term goal of future nuclear energy systems. However, adding MAs will increase plutonium production in the discharged spent fuel. In this work, the Monte-Carlo coupling with ORIGEN-2.2 (MCWO) method was used to optimize the MA loading in the UO2 fuel such that the discharged spent fuel demonstrates enhanced proliferation resistance, while minimizing plutonium production. The axial averaged MA transmutation characteristics at different burnup were compared and their impact on neutronics criticality and the ratio of 238Pu/Pu discussed.

G. S. Chang; Hongbin Zhang

2009-09-01T23:59:59.000Z

289

ACTINIDE REMOVAL PROCESS SAMPLE ANALYSIS, CHEMICAL MODELING, AND FILTRATION EVALUATION  

SciTech Connect (OSTI)

Filtration within the Actinide Removal Process (ARP) currently limits the throughput in interim salt processing at the Savannah River Site. In this process, batches of salt solution with Monosodium Titanate (MST) sorbent are concentrated by crossflow filtration. The filtrate is subsequently processed to remove cesium in the Modular Caustic Side Solvent Extraction Unit (MCU) followed by disposal in saltstone grout. The concentrated MST slurry is washed and sent to the Defense Waste Processing Facility (DWPF) for vitrification. During recent ARP processing, there has been a degradation of filter performance manifested as the inability to maintain high filtrate flux throughout a multi-batch cycle. The objectives of this effort were to characterize the feed streams, to determine if solids (in addition to MST) are precipitating and causing the degraded performance of the filters, and to assess the particle size and rheological data to address potential filtration impacts. Equilibrium modelling with OLI Analyzer{sup TM} and OLI ESP{sup TM} was performed to determine chemical components at risk of precipitation and to simulate the ARP process. The performance of ARP filtration was evaluated to review potential causes of the observed filter behavior. Task activities for this study included extensive physical and chemical analysis of samples from the Late Wash Pump Tank (LWPT) and the Late Wash Hold Tank (LWHT) within ARP as well as samples of the tank farm feed from Tank 49H. The samples from the LWPT and LWHT were obtained from several stages of processing of Salt Batch 6D, Cycle 6, Batch 16.

Martino, C.; Herman, D.; Pike, J.; Peters, T.

2014-06-05T23:59:59.000Z

290

Conference Center Lecture Hall  

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

401 Library Take the elevators downstairs to the Gallery. 401 Library Take the elevators downstairs to the Gallery. Conference Center Lecture Hall The Lecture Hall is a fully-equipped site for meetings of up to 540 people. This total includes: 237 seats on the Lecture Hall main level; 161 seats in the Lecture Hall balcony; and 142 seats in the two flexible rooms under the balcony (with interior walls removed). These rooms can also be used for meetings, both individually (32 classroom-style seats) or together (72 classroom-style seats). An additional 80 people can be seated in the nearby seminar room (A1100). Photo of the Conference Center's Lecture Hall Conference Center Gallery Seminar Room (A1101) The Seminar Room is located just off the Atrium. Conference Center Lecture Hall Atrium The Conference Center Atrium provides an open, elegant space ideal for registration, informational displays, and social hours. Computers are located just off the Atruim for e-mail access.

291

Telecommunications Audio Conference 800 # (Permanent)  

E-Print Network [OSTI]

Telecommunications Audio Conference 800 # (Permanent) 1. Fax completed form to 979.847.1111. 2 Signature Date Service Date Desired Telecommunications Office Use Only 800 # Conference Number Toll Number

292

Your Horizons Conference April 6  

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

gets young women involved in math and science at 31st Expanding Your Horizons Conference April 6 March 4, 2010 Teacher conference also planned LOS ALAMOS, New Mexico, March 4,...

293

EIA - Energy Conferences & Presentations.  

U.S. Energy Information Administration (EIA) Indexed Site

Presentations & Conferences > Conferences > EIA 2008 Energy Conference Presentations & Conferences > Conferences > EIA 2008 Energy Conference Energy Information Administration 2008 Energy Conference: 30 Years of Energy Information and Analysis Conference Videos now available Click presenter name to download PDF of presentation. Monday, April 7 7:30am- 9:00am Registration 9:00am- 10:30am Opening Session Welcome - Guy Caruso, EIA Administrator Keynote Speakers - Secretary Samuel Bodman (full text of speech), Secretary James Schlesinger Distinguished Guest Speaker - Daniel Yergin (Cambridge Energy Research Associates, Inc.) 10:30am- 11:00am Break 11:00am- 12:30pm Concurrent Sessions EIA Program Review and Assessment: Responding to Change Moderator: Howard Gruenspecht (EIA) Panel: Denny Ellerman (Massachusetts Institute of Technology), Lori Krauss (Office of Management and Budget), Kathy Cooper (Southern Methodist University)

294

25th Annual Users' Conference  

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

Registration Conference Schedule Poster Information Banquet Directions SSRLUO Ballot Lodging Information Travel to SLAC Visitor Information For Additional Information Contact:...

295

SciDAC Conferences  

Office of Science (SC) Website

Conferences Conferences Advanced Scientific Computing Research (ASCR) ASCR Home About Research Applied Mathematics Computer Science Next Generation Networking Scientific Discovery through Advanced Computing (SciDAC) Co-Design SciDAC Institutes Computational Science Graduate Fellowship (CSGF) ASCR SBIR-STTR Facilities Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) News & Resources Contact Information Advanced Scientific Computing Research U.S. Department of Energy SC-21/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-7486 F: (301) 903-4846 E: sc.ascr@science.doe.gov More Information » Scientific Discovery through Advanced Computing (SciDAC) SciDAC Conferences Print Text Size: A A A

296

2010 Energy Conference Highlights  

U.S. Energy Information Administration (EIA) Indexed Site

EIA 2010 Energy Conference Highlights EIA 2010 Energy Conference Highlights 2010 Energy Conference: Short-Term Stresses, Long-Term Change Steven Chu, Secretary of Energy Steve Bolze, President/CEO, Power and Water, GE Energy Richard Newell, EIA Administrator, and Lawrence Summers, Director of the National Economic Council Phil Sharp, President, Resources for the Future Secretary Chu answering questions from the media Photo credits: EIA and Kaveh Sardari Plenary keynote addresses: Dr. Richard Newell Read transcript of opening remarks and introduction of Secretary Steven Chu. Dr. Steven Chu Listen to keynote address. Read presentation. Read transcript. Steve Bolze Read presentation. Read transcript. Dr. Phil Sharp Read transcript. Dr. Lawrence Summers Listen to luncheon address. Read transcript.

297

2013 EIA Energy Conference  

U.S. Energy Information Administration (EIA) Indexed Site

conference energy 2013 eia June 17-18, 2013 JW Marriott Washington, DC Welcome to the 2013 EIA Energy Conference. This year's conference highlights one of the more dynamic times in energy that I can remember: skyrocketing growth in U.S. oil and natural gas production, principally from shales, which leads to challenges and opportunities here and around the world for suppliers, consumers, policymakers, and, of course, EIA. Your participation in discussions over the next two days is crucial as we begin a dialogue about the forces that are remaking the energy world at an accelerating pace. We have again this year invited colleagues from both within and outside EIA to present their views on a host of topical energy issues. We look forward to hearing from a distinguished group of speakers

298

Information Resources: Past Conferences  

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

Past Conferences Past Conferences The U.S. Department of Energy (DOE) hosts workshops, conferences, roundtables, and other meetings related to solid-state lighting (SSL) to provide a forum for information exchange and updates on this rapidly evolving technology. November 2013 DOE SSL Market Introduction Workshop Over 200 attendees gathered at the eighth annual DOE SSL Market Introduction Workshop in Portland, OR, to share the latest updates and strategies for successful market introduction of high-quality, energy-efficient SSL solutions. The workshop was preceded by a half day of free educational sessions for newcomers and lighting professionals alike, and an evening bus tour to see the latest CALiPER LED PAR38 and troffer investigations. Highlights Presentations and Materials

299

NASEO Energy Outlook Conference  

Gasoline and Diesel Fuel Update (EIA)

NASEO Energy Outlook Conference NASEO Energy Outlook Conference 2/26/01 Click here to start Table of Contents NASEO Energy Outlook Conference Retail Product Prices Are Driven By Crude Oil WTI Crude Oil Price: Base Case and 95% Confidence Interval OPEC Crude Oil Production 1998-2001 Annual World Oil Demand Growth by Region, 1991-2001 Total OECD Oil Stocks* Fundamentals Explain High Crude Oil Prices Product Price Spreads Over Crude Oil Vary With Seasons and Supply/Demand Balance U.S. Distillate Inventories Distillate Stocks Are Important Part of East Coast Winter Supply Both Distillate Supply and Demand Reached Extraordinary Levels This Winter Heating Oil Imports Strong in 2001 Retail Heating Oil and Diesel Fuel Prices Consumer Winter Heating Oil Costs Propane prices Influenced by Crude Oil and Natural Gas

300

Women Warriors: Indigenous Voices Conference  

E-Print Network [OSTI]

1st Annual Women Warriors: Indigenous Voices Conference March 11th , 12th and 13th , 2012 Hosted by Knowledge. Conference proceedings will include Indigenous Keynote presenters: Dr. Manulani Meyer, Dr. Val be found at: http://womenwarriorsindigenousvoices.weebly.com/registration.html and sent to conference

Northern British Columbia, University of

Note: This page contains sample records for the topic "actinide separations conference" 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

5th International SWAT Conference  

E-Print Network [OSTI]

, and 382-386) Call for Papers Conference Proceedings will be published. Deadline for abstract submission5th International SWAT Conference August 5-7, 2009 Workshop Registration, August 3-4, 2009 Texas A&M University Spatial Sciences Laboratory E-mail: r-srinivasan@tamu.edu Conference Website: http

302

MEDIA BRIEFING CONFERENCE CALL: Secretary Chu to Host Solar Energy...  

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

MEDIA BRIEFING CONFERENCE CALL: Secretary Chu to Host Solar Energy Conference Call MEDIA BRIEFING CONFERENCE CALL: Secretary Chu to Host Solar Energy Conference Call February 4,...

303

SSAB Conference Calls - March 24, 2011 | Department of Energy  

Office of Environmental Management (EM)

Conference Call - March 24, 2011 More Documents & Publications EM SSAB Conference Calls - December 2, 2010 EM SSAB Conference Calls - June 6, 2012 EM SSAB Conference Calls -...

304

EPAct 2005. Conference Report, July 27, 2005 | Department of...  

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

. Conference Report, July 27, 2005 EPAct 2005. Conference Report, July 27, 2005 Energy Policy Act of 2005 from the committee of conference. EPAct 2005. Conference Report, July 27,...

305

TEC Working Group Topic Groups Archives Communications Conference...  

Office of Environmental Management (EM)

Communications Conference Call Summaries TEC Working Group Topic Groups Archives Communications Conference Call Summaries Conference Call Summaries Conference Call Summary April...

306

The State of Environmental Justice in America 2011 Conference...  

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

1 Conference The State of Environmental Justice in America 2011 Conference The State of Environmental Justice in America 2011 Conference EJ Conference, Inc. Presents The State of...

307

The State of Environmental Justice in America 2010 Conference...  

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

0 Conference The State of Environmental Justice in America 2010 Conference The State of Environmental Justice in America 2010 Conference EJ Conference, Inc. Presents The State of...

308

Membrane Separations Research  

E-Print Network [OSTI]

MEMBRANE SEPARATIONS RESEARCH James R. Fair Chemical Engineering Department The University of Texas at Austin Austin, TX 78712 ABSTRACT The use of membranes for separating gaseous and liquid mixtures has grown dramatically in the past 15... years. Applications have been dominated by light gas separations and water purification. During this pioneering period, equipment containing the membrane suIfaces has been developed to a point where failures are minimal and the membranes themselves...

Fair, J. R.

309

Proceedings of the Canadian Hydrographic Conference and National Surveyors Conference 2008 9-2 Page 1 Lead Author L. Alexander  

E-Print Network [OSTI]

Proceedings of the Canadian Hydrographic Conference and National Surveyors Conference 2008 9-2 Page #12;Proceedings of the Canadian Hydrographic Conference and National Surveyors Conference 2008 9

New Hampshire, University of

310

Mobile Conference Connection Conferencing  

E-Print Network [OSTI]

Mobile Conference Connection Conferencing · Help increase productivity while out of the office-mail meeting invitations from your mobile device · Access to "Click to Join" features · Initiate an Instant or other mobile devices can provide a quick and efficient means to respond to work demands. But, what

311

Gordon Research Conferences  

Science Journals Connector (OSTI)

...induced dynamic nuclear polarization...chemically induced nuclear po-larization...Study of photo-chemical mechanisms by phosphores-cence...derivatives in the crystalline state"; W. L...Received: APPLICATION FORM Sent to Chairrr...Conferences Pastore Chemical Laboratory University...

Alexander M. Cruickshank

1973-03-09T23:59:59.000Z

312

TOPICAL REPORT ON ACTINIDE-ONLY BURNUP CREDIT FOR PWR SPENT NUCLEAR FUEL PACKAGES  

SciTech Connect (OSTI)

A methodology for performing and applying nuclear criticality safety calculations, for PWR spent nuclear fuel (SNF) packages with actinide-only burnup credit, is described. The changes in the U-234, U-235, U-236, U-238, Pu-238, Pu-239, Pu-240, Pu-241, Pu-242, and Am-241 concentration with burnup are used in burnup credit criticality analyses. No credit for fission product neutron absorbers is taken. The methodology consists of five major steps. (1) Validate a computer code system to calculate isotopic concentrations of SNF created during burnup in the reactor core and subsequent decay. A set of chemical assay benchmarks is presented for this purpose as well as a method for assessing the calculational bias and uncertainty, and conservative correction factors for each isotope. (2) Validate a computer code system to predict the subcritical multiplication factor, k{sub eff}, of a spent nuclear fuel package. Fifty-seven UO{sub 2}, UO{sub 2}/Gd{sub 2}O{sub 3}, and UO{sub 2}/PuO{sub 2} critical experiments have been selected to cover anticipated conditions of SNF. The method uses an upper safety limit on k{sub eff} (which can be a function of the trending parameters) such that the biased k{sub eff}, when increased for the uncertainty is less than 0.95. (3) Establish bounding conditions for the isotopic concentration and criticality calculations. Three bounding axial profiles have been established to assure the ''end effect'' is accounted for conservatively. (4) Use the validated codes and bounding conditions to generate package loading criteria (burnup credit loading curves). Burnup credit loading curves show the minimum burnup required for a given initial enrichment. The utility burnup record is compared to this requirement after the utility accounts for the uncertainty in its record. Separate curves may be generated for each assembly design, various minimum cooling times and burnable absorber histories. (5) Verify that SNF assemblies meet the package loading criteria and confirm proper assembly selection prior to loading. A measurement of the average assembly burnup is required and that measurement must be within 10% of the utility burnup record for the assembly to be accepted. The measurement device must be accurate to within 10%. Each step is described in detail for use with any computer code system and is then demonstrated with the SCALE 4.2 computer code package using 27BURNUPLIB cross sections.

DOE

1997-04-01T23:59:59.000Z

313

Overall assessment of actinide partitioning and transmutation for waste management purposes  

SciTech Connect (OSTI)

A program to establish the technical feasibility and incentives for partitioning (i.e., recovering) actinides from fuel cycle wastes and then transmuting them in power reactors to shorter-lived or stable nuclides has recently been concluded at the Oak Ridge National Laboratory. The feasibility was established by experimentally investigating the reduction that can be practicably achieved in the actinide content of the wastes sent to a geologic repository, and the incentives for implementing this concept were defined by determining the incremental costs, risks, and benefits. Eight US Department of Energy laboratories and three private companies participated in the program over its 3-year duration. A reference fuel cycle was chosen based on a self-generated plutonium recycle PWR, and chemical flowsheets based on solvent extraction and ion-exchange techniques were generated that have the potential to reduce actinides in fuel fabrication and reprocessing plant wastes to less than 0.25% of those in the spent fuel. Waste treatment facilities utilizing these flowsheets were designed conceptually, and their costs were estimated. Finally, the short-term (contemporary) risks from fuel cycle operations and long-term (future) risks from deep geologic disposal of the wastes were estimated for cases with and without partitioning and transmutation. It was concluded that, while both actinide partitioning from wastes and transmutation in power reactors appear to be feasible using currently identified and studied technology, implementation of this concept cannot be justified because of the small long-term benefits and substantially increased costs of the concept.

Blomeke, J.O.; Croff, A.G.; Finney, B.C.; Tedder, D.W.

1980-01-01T23:59:59.000Z

314

Screening Evaluation of Alternate Sorbents and Methods for Strontium and Actinide Removal from Alkaline Salt Solution  

SciTech Connect (OSTI)

This report describes results from screening tests evaluating strontium and actinide removal characteristics of three different titanium-containing sorbents, crystalline silicotitanate (CST) manufactured by UPO, SrTreat(R) offered by Fortum Engineering, sodium nonatitanate developed by Clearfield and coworkers at Texas A and M University and offered commercially by Honeywell. We also report results from an alternate removal method, coprecipitation.

Hobbs, D.T.

2001-04-17T23:59:59.000Z

315

Assessment of SFR fuel pin performance codes under advanced fuel for minor actinide transmutation  

SciTech Connect (OSTI)

Americium is a strong contributor to the long term radiotoxicity of high activity nuclear waste. Transmutation by irradiation in nuclear reactors of long-lived nuclides like {sup 241}Am is, therefore, an option for the reduction of radiotoxicity and residual power packages as well as the repository area. In the SUPERFACT Experiment four different oxide fuels containing high and low concentrations of {sup 237}Np and {sup 241}Am, representing the homogeneous and heterogeneous in-pile recycling concepts, were irradiated in the PHENIX reactor. The behavior of advanced fuel materials with minor actinide needs to be fully characterized, understood and modeled in order to optimize the design of this kind of fuel elements and to evaluate its performances. This paper assesses the current predictability of fuel performance codes TRANSURANUS and GERMINAL V2 on the basis of post irradiation examinations of the SUPERFACT experiment for pins with low minor actinide content. Their predictions have been compared to measured data in terms of geometrical changes of fuel and cladding, fission gases behavior and actinide and fission product distributions. The results are in good agreement with the experimental results, although improvements are also pointed out for further studies, especially if larger content of minor actinide will be taken into account in the codes. (authors)

Bouineau, V.; Lainet, M.; Chauvin, N.; Pelletier, M. [French Alternative Energies and Atomic Energy Commission - CEA, CEA Cadarache, DEN/DEC/SESC, 13108 Saint Paul lez Durance (France); Di Marcello, V.; Van Uffelen, P.; Walker, C. [European Commission, Joint Research Centre, Institute for Transuranium Elements, Hermann-von-Helmholtz-Platz 1, D- 76344 Eggenstein-Leopoldshafen (Germany)

2013-07-01T23:59:59.000Z

316

ELECTRONIC STRUCTURE IN METALS AND ALLOYS. ELECTRONIC STRUCTURE OF THE LIGHT ACTINIDES  

E-Print Network [OSTI]

ELECTRONIC STRUCTURE IN METALS AND ALLOYS. ELECTRONIC STRUCTURE OF THE LIGHT ACTINIDES B. D. DUNLAP electrons. A review is given of some areas of current interest, especially where hyperfine techniques have the 60 keV y-ray of 237Np[l]. At that time, our understanding of the electronic properties

Boyer, Edmond

317

Separation technologies: Marketing factors  

SciTech Connect (OSTI)

The chemical and petroleum industries consume approximately 5.8 quads per year of energy. Within these industries, 43% of the energy is used by separation processes to recover and purify products. With 40,000 distillation columns in operation, distillation is used to make 95% of all separations in these two industries. Although separations are identified which are amenable to advanced separation technologies (that make distillation more energy-efficient), they are not implemented because of commercial barriers. The focus of this work was on barriers which can by overcome by implementing advanced separation-related technologies. Barriers were screened and prioritized, and Return On Investment (ROI) was calculated for each project designed to overcome a high priority barrier. Economic analyses were based on specific separations such as ethylene-ethane, propylene-propane, ethyl benzene-styrene, and ethanol-water. These separations were selected because they consume significant amounts of energy for separation. Thus, conclusions are based on a limited number of case studies; an approach necessary to complete this project within a reasonable time frame. Recommended projects are discussed and summarized.

Humphrey, J.L.; Seibert, A.F.; Goodpastor, C.V.

1991-12-01T23:59:59.000Z

318

Substituted polyacetylene separation membrane  

DOE Patents [OSTI]

A separation membrane is described which is useful for gas separation, particularly separation of C{sub 2+} hydrocarbons from natural gas. The invention encompasses the membrane itself, methods of making it and processes for using it. The membrane comprises a polymer having repeating units of a hydrocarbon-based, disubstituted polyacetylene, having the general formula shown in the accompanying diagram, wherein R{sub 1} is chosen from the group consisting of C{sub 1}-C{sub 4} alkyl and phenyl, and wherein R{sub 2} is chosen from the group consisting of hydrogen and phenyl. In the most preferred embodiment, the membrane comprises poly(4-methyl-2-pentyne) [PMP]. The membrane exhibits good chemical resistance and has super-glassy properties with regard to separating certain large, condensable permeant species from smaller, less-condensable permeant species. The membranes may also be useful in other fluid separations. 4 figs.

Pinnau, I.; Morisato, Atsushi

1998-01-13T23:59:59.000Z

319

Substituted polyacetylene separation membrane  

DOE Patents [OSTI]

A separation membrane useful for gas separation, particularly separation of C.sub.2+ hydrocarbons from natural gas. The invention encompasses the membrane itself, methods of making it and processes for using it. The membrane comprises a polymer having repeating units of a hydrocarbon-based, disubstituted polyacetylene, having the general formula: ##STR1## wherein R.sub.1 is chosen from the group consisting of C.sub.1 -C.sub.4 alkyl and phenyl, and wherein R.sub.2 is chosen from the group consisting of hydrogen and phenyl. In the most preferred embodiment, the membrane comprises poly(4-methyl-2-pentyne) ›PMP!. The membrane exhibits good chemical resistance and has super-glassy properties with regard to separating certain large, condensable permeant species from smaller, less-condensable permeant species. The membranes may also be useful in other fluid separations.

Pinnau, Ingo (Palo Alto, CA); Morisato, Atsushi (Tokyo, JP)

1998-01-13T23:59:59.000Z

320

Separators for flywheel rotors  

DOE Patents [OSTI]

A separator forms a connection between the rotors of a concentric rotor assembly. This separator allows for the relatively free expansion of outer rotors away from inner rotors while providing a connection between the rotors that is strong enough to prevent disassembly. The rotor assembly includes at least two rotors referred to as inner and outer flywheel rings or rotors. This combination of inner flywheel ring, separator, and outer flywheel ring may be nested to include an arbitrary number of concentric rings. The separator may be a segmented or continuous ring that abuts the ends of the inner rotor and the inner bore of the outer rotor. It is supported against centrifugal loads by the outer rotor and is affixed to the outer rotor. The separator is allowed to slide with respect to the inner rotor. It is made of a material that has a modulus of elasticity that is lower than that of the rotors. 10 figs.

Bender, D.A.; Kuklo, T.C.

1998-07-07T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Separators for flywheel rotors  

DOE Patents [OSTI]

A separator forms a connection between the rotors of a concentric rotor assembly. This separator allows for the relatively free expansion of outer rotors away from inner rotors while providing a connection between the rotors that is strong enough to prevent disassembly. The rotor assembly includes at least two rotors referred to as inner and outer flywheel rings or rotors. This combination of inner flywheel ring, separator, and outer flywheel ring may be nested to include an arbitrary number of concentric rings. The separator may be a segmented or continuous ring that abuts the ends of the inner rotor and the inner bore of the outer rotor. It is supported against centrifugal loads by the outer rotor and is affixed to the outer rotor. The separator is allowed to slide with respect to the inner rotor. It is made of a material that has a modulus of elasticity that is lower than that of the rotors.

Bender, Donald A. (Dublin, CA); Kuklo, Thomas C. (Oakdale, CA)

1998-01-01T23:59:59.000Z

322

ENHANCED CHEMICAL CLEANING OF SRS WASTE TANKS TO IMPROVE ACTINIDE SOLUBILITY  

SciTech Connect (OSTI)

Processes for the removal of residual sludge from SRS waste tanks have historically used solutions containing up to 0.9 M oxalic acid to dissolve the remaining material following sludge removal. The selection of this process was based on a comparison of a number of studies performed to evaluate the dissolution of residual sludge. In contrast, the dissolution of the actinide mass, which represents a very small fraction of the waste, has not been extensively studied. The Pu, Np, and Am in the sludge is reported to be present as hydrated and crystalline oxides. To identify aqueous solutions which have the potential to increase the solubility of the actinides, the alkaline and mildly acidic test solutions shown below were selected as candidates for use in a series of solubility experiments. The efficiency of the solutions in solubilizing the actinides was evaluated using a simulated sludge prepared by neutralizing a HNO{sub 3} solution containing Pu, Np, and Am. The hydroxide concentration was adjusted to a 1.2 M excess and the solids were allowed to age for several weeks prior to starting the experiments. The sludge was washed with 0.01 M NaOH to prepare the solids for use. Following the addition of an equal portion of the solids to each test solution, the concentrations of Pu, Np, and Am were measured as a function of time over a 792 h (33 day) period to provide a direct comparison of the efficiency of each solution in solubilizing the actinide elements. Although the composition of the sludge was limited to the hydrated actinide oxides (and did not contain other components of demonstrated importance), the results of the study provides guidance for the selection of solutions which should be evaluated in subsequent tests with a more realistic surrogate sludge and actual tank waste.

Rudisill, T.; Thompson, M.

2011-09-20T23:59:59.000Z

323

11th Annual Minnesota Pavement Conference  

E-Print Network [OSTI]

11th Annual Minnesota Pavement Conference: Session Summaries Conference Sponsors: Minnesota, 2007 Continuing Education and Conference Center University of Minnesota St. Paul Campus #12;Conference Objective This one-day annual conference provides information to practitioners and others in pavement design

Minnesota, University of

324

4th BIENNIAL THRESHOLD CONCEPTS CONFERENCE and 6th NAIRTL ANNUAL CONFERENCE  

E-Print Network [OSTI]

4th BIENNIAL THRESHOLD CONCEPTS CONFERENCE and 6th NAIRTL ANNUAL CONFERENCE Register at www.nairtl.ie/conference12 before May 31st Registration fee is 200 SUB-THEMES The conference programme will include oral development, and new developments in threshold concepts. PRE-CONFERENCE WORKSHOPS A pre-conference "Student

O'Mahony, Donal E.

325

Neutron Scattering Conference Archive  

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

Conference Archive Conference Archive A new portal for neutron scattering has just been established at neutronsources.org. The information contained here in the Neutron Scattering Web has been transferred to the new site. We will leave the current content here for archival purposes but no new content will be added. We encourage everyone interested in neutron scattering to take full advantage of this exciting new resource for our community. Neutronsources.org 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 2000 June 12-14, 2000 Workshop on "New Opportunities for Better User Group Software (NOBUGS III)" Location Daresbury Laboratory, Cheshire, UK Contact Mark Enderby, Daresbury Laboratory Email M.J.Enderby@dl.ac.uk URL http://nobugs.dl.ac.uk/

326

Address EJ Conference  

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

Congressman Clyburn to Congressman Clyburn to Address EJ Conference Congressman Clyburn has graciously agreed to speak at The State of Environmental Justice in America 2011 Conference. Congressman Clyburn (D - SC) has been a member of the U.S. House of Congress since 1993. He has held the positions of Chairman of the Democratic Black Caucus, House Democratic Caucus Vice Chair, Chair of the Democratic Caucus and from 2006 until January 2011, was the House Majority Whip. Currently, as Assistant Democratic Leader in the 112th Congress and the number three Democrat in the House, James E. Clyburn will be the leadership liaison to the Appropriations Committee and one of the Democratic Caucus' primary liaisons to the White House. Congressman Clyburn has been a life long champion and has worked diligently

327

DOE Technical Conference  

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

Conference Conference March 29, 2006 Poonum Agrawal Office of Electricity Delivery and Energy Reliability US Department of Energy 2 Considerations in the Statute the economic vitality and development of the corridor, or the end markets served by the corridor, may be constrained by lack of adequate or reasonably priced electricity; (i) the economic growth in the corridor, or the end markets served by the corridor, may be jeopardized by reliance on limited sources of energy; and (ii) a diversification of supply is warranted; the energy independence of the United States would be served by the designation; the designation would be in the interest of national energy policy; and the designation would enhance national defense and homeland security. 3 Criteria

328

Annual Energy Outlook 2000 Conference  

Gasoline and Diesel Fuel Update (EIA)

Summary of Last Year's Conference Summary of Last Year's Conference The Energy Information Administration (EIA) will host its eighth annual National Energy Modeling System/Annual Energy Outlook Conference on March 21, 2000, at the Crystal Gateway Marriott, 1700 Jefferson Davis Highway, Arlington, VA, near the Crystal City Metro station. The conference includes speakers and attendees from Federal and State governments, private industry, and trade associations, discussing energy issues particularly related to EIAÂ’s Annual Energy Outlook 2000, which was released in November 1999, and the National Energy Modeling System. Conference Registration Conference registration is free, but space is limited. You can register on-line or fax this form to: Peggy Wells Energy Information Administration, EI-84

329

Sequestering agents for the removal of actinides from waste streams  

SciTech Connect (OSTI)

The ultimate goal of this project is to develop new separation technologies to remove radioactive metal ions from contaminated DOE sites. To this end we are studying both the fundamental chemistry and the extractant properties of some chelators that are either found in nature or are closely related to natural materials. The work is a collaboration betwen Lawrence Berkeley National Laboratory-University of California, Berkeley, and the Glenn T. Seaborg Institute for Transactinium Science at Lawrence Livermore National Laboratory.

Raymond, K.; White, D. [Univ. of California, Berkeley, CA (United States); Whisenhunt, D. [Lawrence Livermore National Lab., CA (United States)

1996-10-01T23:59:59.000Z

330

USABC Battery Separator Development  

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

Separator Development P.I. - Ron Smith Presenter - Kristoffer Stokes, Ph.D. Celgard, LLC Project ID ES007 May 10, 2011 This presentation does not contain any proprietary,...

331

Calix 2007:9th International Conference on Calixarene Chemistry  

SciTech Connect (OSTI)

The DOE funds helped support an International Conference, Calix 2007, whose focus was on Supramolecular Chemistry. The conference was held at the University of Maryland from August 6-9, 2007 (Figure 1). The conference website is at www.chem.umd.edu/Conferences/Calix2007. This biannual conference had previously been held in the Czech Republic (2005), Canada (2003), Netherlands (2001), Australia (1999), Italy (1997), USA (Fort Worth, 1995) Japan (1993) and Germany (1991). Calixarenes are cup-shaped compounds that are a major part of Supramolecular Chemistry, for which Cram, Lehn and Pederson were awarded a Nobel Prize 20 years ago. Calixarene chemistry has expanded greatly in the last 2 decades, as these compounds are used in synthetic and mechanistic chemistry, separations science, materials science, nanoscience and biological chemistry. The organizing committee was quite happy that Calix 2007 encompassed the broad scope and interdisciplinary nature of the field. Our goal was to bring together leading scientists interested in calixarenes, molecular recognition, nanoscience and supramolecular chemistry. We believe that new research directions and collaborations resulted from an exchange of ideas between conferees. This grant from the DOE was crucial toward achieving that goal, as the funds helped cover some of the registration and accommodations costs for the speakers.

Jeffery Davis

2011-09-09T23:59:59.000Z

332

successfully demonstrated the separation  

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

successfully demonstrated the separation and capture of 90 percent successfully demonstrated the separation and capture of 90 percent of the c arbon dioxide (CO 2 ) from a pulve rized coal plant. In t he ARRA-funded project, Membrane Technology and Research Inc. (MTR) and its partners tested the Polaris(tm) membrane system, which uses a CO 2 -selective polymeric membrane material and module to capture CO 2 from a plant's flue gas. Since the Polaris(tm) membranes

333

Hydrogen separation process  

DOE Patents [OSTI]

A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200.degree. C., to a hydrogen separation membrane system comprising a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for separating a hydrogen-rich product stream from a feed stream comprising hydrogen and at least one carbon-containing gas, comprising feeding the feed stream, at an inlet pressure greater than atmospheric pressure and a temperature greater than 200.degree. C., to an integrated water gas shift/hydrogen separation membrane system wherein the hydrogen separation membrane system comprises a membrane that is selectively permeable to hydrogen, and producing a hydrogen-rich permeate product stream on the permeate side of the membrane and a carbon dioxide-rich product raffinate stream on the raffinate side of the membrane. A method for pretreating a membrane, comprising: heating the membrane to a desired operating temperature and desired feed pressure in a flow of inert gas for a sufficient time to cause the membrane to mechanically deform; decreasing the feed pressure to approximately ambient pressure; and optionally, flowing an oxidizing agent across the membrane before, during, or after deformation of the membrane. A method of supporting a hydrogen separation membrane system comprising selecting a hydrogen separation membrane system comprising one or more catalyst outer layers deposited on a hydrogen transport membrane layer and sealing the hydrogen separation membrane system to a porous support.

Mundschau, Michael (Longmont, CO); Xie, Xiaobing (Foster City, CA); Evenson, IV, Carl (Lafayette, CO); Grimmer, Paul (Longmont, CO); Wright, Harold (Longmont, CO)

2011-05-24T23:59:59.000Z

334

Conference on "Trees, Woods and Forests in  

E-Print Network [OSTI]

Conference on "Trees, Woods and Forests in British Society" Delegates Pack Organised by the Centre............................................................................................3 1.1 Conference objectives...................................................................................................38 | Forests and Society Conference | BAO and JW | 08/04/2010 2 #12;Forests and Society 1

335

IBS 2015 – 7th Biennial Conference  

E-Print Network [OSTI]

IBS 2015 – 7th Biennial Conference January 8th – 12th 2015,for its 7th interna- tional conference. This modern researchand workshops or check the conference website for details:

2014-01-01T23:59:59.000Z

336

Summer Conference: Research in Forensic Psychiatry  

E-Print Network [OSTI]

1st Summer Conference: Research in Forensic Psychiatry The University of Regensburg Forensic Conference: Research in Forensic Psychiatry in Regensburg. The conference schedule comprises nearly fifty contributions from various disciplines within forensic research. The broad scope of contributions highlights

Schubart, Christoph

337

NASEO Energy Policy Outlook Conference  

Broader source: Energy.gov [DOE]

The National Association of State Energy Officials (NASEO) is hosting its annual conference in Washington, D.C., on Feb. 3-6, 2015.

338

European Wind Energy Conference Exhibition  

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

European Wind Energy Conference & Exhibition 2009 Parc Chanot, Marseille, France 16-19 March 2009 ACTIVE AERODYNAMIC BLADE CONTROL DESIGN FOR LOAD REDUCTION ON LARGE WIND TURBINES...

339

Nebraska Wind Conference and Exhibition  

Office of Energy Efficiency and Renewable Energy (EERE)

The theme of the conference is "Harvesting Nebraska's Potential," which focuses on Nebraska's competitive position for attracting wind development. More information will be available on the 6th...

340

Advanced Bioeconomy Leadership Conference 2015  

Broader source: Energy.gov [DOE]

The Advanced Bioeconomy Leadership Conference will be held on March 11–13, at the Capital Hilton in Washington, D.C.

Note: This page contains sample records for the topic "actinide separations conference" 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

International Marine Renewable Energy Conference  

Broader source: Energy.gov [DOE]

The International Marine Renewable Energy Conference (IMREC) offers researchers, technology developers, policy makers, NGOs, and industry representatives the opportunity to discuss financing...

342

LANL Foundation conference draws teachers  

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

LANL Foundation Conference Draws Teachers Community Connections: Your link to news and opportunities from Los Alamos National Laboratory Latest Issue: Dec. 2014 - Jan. 2015 All...

343

Tanana Chiefs Conference Annual Convention  

Broader source: Energy.gov [DOE]

The Tanana Chiefs Conference is holding its annual convention to discuss issues in the region, hold elections, and adopt resolutions presented by Tribes.

344

Conferences & Meetings | Department of Energy  

Office of Environmental Management (EM)

Office hosts a conference each year featuring hot topics and key figures in the biomass industry. Office staff also participate in various meetings and the bienniel Peer...

345

SRI2007 Conference - Manuscript Review  

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

Instructions to Referees Selected referees (referee list will be posted at the conference) are requested to pick up manuscripts at the editorial office beginning Thursday, April...

346

BBEE Public Utility Conference Call  

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

BBEE Public Utility Conference Call May 19, 2011 - Summary Summer Goodwin, BPA, welcomed public utility representative participants, asked them to introduce themselves, and...

347

AWWA, WEF Utility Management Conference  

Broader source: Energy.gov [DOE]

The American Water Works Association (AWWA) and Water Environment Federation (WEF) are hosting their annual conference in Austin, TX, on Feb. 17-20, 2015.

348

Mantle Helium And Carbon Isotopes In Separation Creek Geothermal Springs,  

Open Energy Info (EERE)

Mantle Helium And Carbon Isotopes In Separation Creek Geothermal Springs, Mantle Helium And Carbon Isotopes In Separation Creek Geothermal Springs, Three Sisters Area, Central Oregon- Evidence For Renewed Volcanic Activity Or A Long Term Steady State System(Question) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Mantle Helium And Carbon Isotopes In Separation Creek Geothermal Springs, Three Sisters Area, Central Oregon- Evidence For Renewed Volcanic Activity Or A Long Term Steady State System(Question) Details Activities (1) Areas (1) Regions (0) Abstract: Here we present the helium and carbon isotope results from the initial study of a fluid chemistry-monitoring program started in the summer of 2001 near the South Sister volcano in central Oregon. The Separation Creek area which is several miles due west of the volcano is the locus of

349

Proceedings of conference on fleet use of unique automotive fuels  

SciTech Connect (OSTI)

Papers and/or summaries of presentations which were given at the conference are included in this volume. The conference was concerned with alcohol and emergency fuels. Topics covered include: ethanol supply; Texaco lead-free gasohol distribution; the BETC fleet test program; the army fleet test program; tri-butyl alcohol and methanol in gasoline (blending, distribution, utilization); the DOE alcohol fuels utilization program; DOE engineering and reliability fleet test results; federal emergency energy policy; emergency transportation resource management; EPA emergency action; DOE transportation emergency fuels program; and emergency fuels utilization guidebook. Summaries of the 2 panel discussions are also included. Separate abstracts of 5 papers have been prepared for inclusion in the Energy Data Base. There are 10 summaries in this document which have not been abstracted separately. (DMC)

Not Available

1980-01-01T23:59:59.000Z

350

Potentiometric Sensor for Real-Time Remote Surveillance of Actinides in Molten Salts  

SciTech Connect (OSTI)

A potentiometric sensor is being developed at the Idaho National Laboratory for real-time remote surveillance of actinides during electrorefining of spent nuclear fuel. During electrorefining, fuel in metallic form is oxidized at the anode while refined uranium metal is reduced at the cathode in a high temperature electrochemical cell containing LiCl-KCl-UCl3 electrolyte. Actinides present in the fuel chemically react with UCl3 and form stable metal chlorides that accumulate in the electrolyte. This sensor will be used for process control and safeguarding of activities in the electrorefiner by monitoring the concentrations of actinides in the electrolyte. The work presented focuses on developing a solid-state cation conducting ceramic sensor for detecting varying concentrations of trivalent actinide metal cations in eutectic LiCl-KCl molten salt. To understand the basic mechanisms for actinide sensor applications in molten salts, gadolinium was used as a surrogate for actinides. The ß?-Al2O3 was selected as the solid-state electrolyte for sensor fabrication based on cationic conductivity and other factors. In the present work Gd3+-ß?-Al2O3 was prepared by ion exchange reactions between trivalent Gd3+ from GdCl3 and K+-, Na+-, and Sr2+-ß?-Al2O3 precursors. Scanning electron microscopy (SEM) was used for characterization of Gd3+-ß?-Al2O3 samples. Microfocus X-ray Diffraction (µ-XRD) was used in conjunction with SEM energy dispersive X-ray spectroscopy (EDS) to identify phase content and elemental composition. The Gd3+-ß?-Al2O3 materials were tested for mechanical and chemical stability by exposing them to molten LiCl-KCl based salts. The effect of annealing on the exchanged material was studied to determine improvements in material integrity post ion exchange. The stability of the ß?-Al2O3 phase after annealing was verified by µ-XRD. Preliminary sensor tests with different assembly designs will also be presented.

Natalie J. Gese; Jan-Fong Jue; Brenda E. Serrano; Guy L. Fredrickson

2012-07-01T23:59:59.000Z

351

10th Annual Small Wind Conference  

Broader source: Energy.gov [DOE]

This conference is designed for small wind professionals, including installers, manufacturers, dealers, distributors, educators, and advocates. The conference features presentations, exhibits,...

352

Transportation Protocols Working Group First Conference Call...  

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

Call March 1, 1999 Conference Call Summary The first conference call of the Transportation External Coordination Working Group (TECWG) DOE Transportation Protocols Working...

353

European Wave and Tidal Energy Conference  

Broader source: Energy.gov [DOE]

The European Wave and Tidal Energy Conference (EWTEC) series are international, technical and scientific conferences, focussed on ocean renewable energy and widely respected for their commitment to...

354

Expanding Your Horizons Conference, Lawrence Livermore National...  

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

Expanding Your Horizons Conference, Lawrence Livermore National Lab Expanding Your Horizons Conference, Lawrence Livermore National Lab August 1, 2013 6:45PM EDT to August 31, 2013...

355

Conference Calls / Live Meetings - Hanford Site  

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

Conference Calls Live Meetings About Us Hanford Overview and History Hanford Cleanup Hanford Site Wide Programs Conference Calls Live Meetings Email Email Page | Print Print...

356

Conference of Mayors | Open Energy Information  

Open Energy Info (EERE)

Mayors Jump to: navigation, search Name: Conference of Mayors Place: Washington, DC Website: http:www.conferenceofmayors. References: Conference of Mayors1 Information About...

357

ACEEE Intelligent Efficiency Conference | Department of Energy  

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

ACEEE Intelligent Efficiency Conference ACEEE Intelligent Efficiency Conference November 16, 2014 2:00PM EST to November 18, 2014 10:00PM EST Learn more...

358

Electric Drive Transportation Association Conference | Department...  

Energy Savers [EERE]

Association Conference Electric Drive Transportation Association Conference Addthis Test Drive 1 of 5 Test Drive Deputy Assistant Secretary for Transportation Reuben Sarkar...

359

24th Annual BIA Tribal Providers Conference  

Office of Energy Efficiency and Renewable Energy (EERE)

The BIA Tribal Providers Conference is the second largest conference in Alaska, providing opportunities for tribal leaders, native corporations and rural representatives to connect with federal...

360

Iceland Geothermal Conference 2013 - Geothermal Policies and...  

Energy Savers [EERE]

Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal Conference 2013 - Geothermal Policies and Impacts in the U.S. Iceland Geothermal...

Note: This page contains sample records for the topic "actinide separations conference" 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

Conference Agenda: Residential Energy Efficiency Solutions 2012...  

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

breakouts. rees2012finalagenda.pdf More Documents & Publications Draft Agenda for U.S.-Africa Energy Ministerial Biomass 2009 Conference Agenda Biomass 2010 Conference Agenda...

362

DOE model conference on waste management and environmental restoration  

SciTech Connect (OSTI)

Reports dealing with current topics in waste management and environmental restoration were presented at this conference in six sessions. Session 1 covered the Hot Topics'' including regulations and risk assessment. Session 2 dealt with waste reduction and minimization; session 3 dealt with waste treatment and disposal. Session 4 covered site characterization and analysis. Environmental restoration and associated technologies wee discussed in session 5 and 6. Individual papers have been cataloged separately.

Not Available

1990-01-01T23:59:59.000Z

363

Organic Separation Test Results  

SciTech Connect (OSTI)

Separable organics have been defined as “those organic compounds of very limited solubility in the bulk waste and that can form a separate liquid phase or layer” (Smalley and Nguyen 2013), and result from three main solvent extraction processes: U Plant Uranium Recovery Process, B Plant Waste Fractionation Process, and Plutonium Uranium Extraction (PUREX) Process. The primary organic solvents associated with tank solids are TBP, D2EHPA, and NPH. There is concern that, while this organic material is bound to the sludge particles as it is stored in the tanks, waste feed delivery activities, specifically transfer pump and mixer pump operations, could cause the organics to form a separated layer in the tank farms feed tank. Therefore, Washington River Protection Solutions (WRPS) is experimentally evaluating the potential of organic solvents separating from the tank solids (sludge) during waste feed delivery activities, specifically the waste mixing and transfer processes. Given the Hanford Tank Waste Treatment and Immobilization Plant (WTP) waste acceptance criteria per the Waste Feed Acceptance Criteria document (24590-WTP-RPT-MGT-11-014) that there is to be “no visible layer” of separable organics in the waste feed, this would result in the batch being unacceptable to transfer to WTP. This study is of particular importance to WRPS because of these WTP requirements.

Russell, Renee L.; Rinehart, Donald E.; Peterson, Reid A.

2014-09-22T23:59:59.000Z

364

Joint Actinide Shock Physics Experimental Research Facility Restart Operational Readiness Review Pre- Visit  

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

NNSS-2011-04-28 NNSS-2011-04-28 Site: Nevada National Security Site Subject: Office of Enforcement and Oversight's Office of Safety and Emergency Management Evaluations Activity Report for the Joint Actinide Shock Physics Experimental Research Facility Restart Operational Readiness Review Pre- Visit Dates of Activity: 04/25/2011 - 04/28/2011 Report Preparer William Macon Activity Description/Purpose: In coordination with the National Nuclear Security Administration (NNSA) Service Center, the Office of Health, Safety and Security (HSS) site lead participated in a pre-visit for the NNSA Operational Readiness Review (ORR) of the Joint Actinide Shock Physics Experimental Research (JASPER) facility restart conducted April 25-28, 2011. The site lead also participated

365

Evaluation of extractants and chelating resins in polishing actinide-contaminated waste streams  

SciTech Connect (OSTI)

At the Los Alamos National Laboratory Plutonium Facility, anion exchange is used for recovering plutonium from nitric acid solutions. Although this approach recovers >99%, the trace amounts of plutonium and other actinides remaining in the effluent require additional processing. We are doing research to develop a secondary unit operation that can directly polish the effluent so that actinide levels are reduced to below the maximum allowed for facility discharge. We selected solvent extraction, the only unit operation that can meet the stringent process requirements imposed; several carbonyl and phosphoryl extractants were evaluated and their performance characterized. We also investigated various engineering approaches for solvent extraction; the most promising was a chelating resin loaded with extractant. Our research now focuses on the synthesis of malonamides, and our goal is to bond these extractants to a resin matrix. 7 refs., 12 figs., 1 tab.

Schreiber, S.B.; Dunn, S.L.; Yarbro, S.L.

1991-06-01T23:59:59.000Z

366

Detailed studies of Minor Actinide transmutation-incineration in high-intensity neutron fluxes  

SciTech Connect (OSTI)

The Mini-INCA project is dedicated to the measurement of incineration-transmutation chains and potentials of minor actinides in high-intensity thermal neutron fluxes. In this context, new types of detectors and methods of analysis have been developed. The {sup 241}Am and {sup 232}Th transmutation-incineration chains have been studied and several capture and fission cross sections measured very precisely, showing some discrepancies with existing data or evaluated data. An impact study was made on different based-like GEN-IV reactors. It underlines the necessity to proceed to precise measurements for a large number of minor-actinides that contribute to these future incineration scenarios. (authors)

Bringer, O. [CEA/Saclay/DSM/DAPNIA, Gif-sur-Yvette (France); Al Mahamid, I. [Lawrence Berkeley National Laboratory, E.H. and S. Div., CA (United States); Blandin, C. [CEA/Cadarache/DEN/DER/SPEX, Saint-Paul-lez-Durances (France); Chabod, S. [CEA/Saclay/DSM/DAPNIA, Gif-sur-Yvette (France); Chartier, F. [CEA/Cadarache/DEN/DPC/SECR, Gif-sur-Yvette (France); Dupont, E.; Fioni, G. [CEA/Saclay/DSM/DAPNIA, Gif-sur-Yvette (France); Isnard, H. [CEA/Cadarache/DEN/DPC/SECR, Gif-sur-Yvette (France); Letourneau, A.; Marie, F. [CEA/Saclay/DSM/DAPNIA, Gif-sur-Yvette (France); Mutti, P. [Institut Laue-Langevin, Grenoble (France); Oriol, L. [CEA/Cadarache/DEN/DER/SPEX, Saint-Paul-lez-Durances (France); Panebianco, S.; Veyssiere, C. [CEA/Saclay/DSM/DAPNIA, Gif-sur-Yvette (France)

2006-07-01T23:59:59.000Z

367

Evaluation and testing of sequestering agents for the removal of actinides from waste streams  

SciTech Connect (OSTI)

The purpose of this project is to evaluate and test the complexing ability of a variety of promising new complexing agents synthesized by Professor Kenneth Raymond`s group at the University of California, Berkeley (ESP-CP TTP Number SF16C311). Some of these derivatives have already shown the potential for selectivity binding Pu(IV) in a wide range of solutions in the presence of other metals. Professor Raymond`s group uses molecular modeling to design and synthesize ligands based on modification of natural siderophores, or their analogs, for chelation of actinides. The ligands are then modified for use as liquid/liquid and solid/liquid extractants. The authors` group at the Glenn T. Seaborg Institute for Transactinium Science (ITS) at Lawrence Livermore National Laboratory determines the complex formation constants between the ligands and actinide ions, the capacity and time dependence for uptake on the resins, and the effect of other metal ions and pH.

Hoffman, D.C.; Romanovski, V.V.; Veeck, A.C. [Lawrence Livermore National Lab., CA (United States)] [and others

1997-10-01T23:59:59.000Z

368

Final Technical Progress Report Long term risk from actinides in the environment: Modes of mobility  

SciTech Connect (OSTI)

The key source of uncertainty in assessing actinide mobility is the relative importance of transport by: (1) wind erosion, (2) water erosion, and (3) vertical migration. Each of these three processes depends on several environmental factors and they compete with one another. A scientific assessment of the long-term risks associated with actinides in surface soils depends on better quantifying each of these three modes of mobility. The objective from our EMSP study was to quantify the mobility of soil actinides by wind erosion, water erosion, and vertical migration at three semiarid sites where actinide mobility is a key technical, social and legal issue. This EMSP project was the first to evaluate all three factors at a site. The approach has been to investigate both short- and long-term issues based on field and lab studies and model comparisons. Our results demonstrate the importance of incorporating threshold responses into a modeling framework that accounts for environmental factors and natural disturbances that trigger large changes in actinide mobility. The study measured erosional losses of sediment and fallout cesium (an actinide analogue) from field plots located near WIPP in 1998. The results highlight the large effect of burning as a disturbance on contaminant transport and mobility via runoff and erosion. The results show that runoff, erosion, and actinide transport are (1) strongly site specific-differences in radionuclide transport between WIPP and Rocky Flats differed by a factor of twelve because of soil and vegetation differences, and (2) are strongly impacted by disturbances such as fire, which can increase runoff, erosion, and actinide transport by more than an order of magnitude. In addition, a laboratory experiment using soil columns was conducted to investigate the vertical transport of contaminants in sandy soils. Nine columns of soil collected from the vicinity of the WIPP site were prepared. The column consisted of a piece of PVC pipe 20 cm in diameter and approximately 22 cm long. A thin ''marker layer'' of white soil was added to the top of each column followed by a thin layer of soil that had been spiked with 137Cs, cerium and lanthanum was applied to the surface. Approximately 900 cm of water (the equivalent of about 30 years of rainfall) was then applied at a rate of 3.2 L d-1. All of the activity contained in the soil core appeared to be in the top few mm of soil, i.e. there was virtually no movement of the 134Cs labeled particles. Finally, a library of object-oriented model components was created using Visual Basic to support the construction of contaminant transport models. These components greatly simplify the task of building 1- to 3- dimensional simulation models for risk assessment. The model components created under this funding were subsequently applied to help answer questions regarding risks from irrigation associated with potential releases from the Yucca Mountain waste repository.

Thomas B. Kirchner

2002-03-22T23:59:59.000Z

369

Extraction of actinides by multi-dentate diamides and their evaluation with computational molecular modeling  

SciTech Connect (OSTI)

Multi-dentate diamides have been synthesized and examined for actinide (An) extractions. Bi- and tridentate extractants are the focus in this work. The extraction of actinides was performed from 0.1-6 M HNO{sub 3} to organic solvents. It was obvious that N,N,N',N'-tetra-alkyl-diglycolamide (DGA) derivatives, 2,2'-(methylimino)bis(N,N-dioctyl-acetamide) (MIDOA), and N,N'-dimethyl-N,N'-dioctyl-2-(3-oxa-pentadecane)-malonamide (DMDOOPDMA) have relatively high D values (D(Pu) > 70). The following notable results using DGA extractants were obtained: (1) DGAs with short alkyl chains give higher D values than those with long alkyl chain, (2) DGAs with long alkyl chain have high solubility in n-dodecane. Computational molecular modeling was also used to elucidate the effects of structural and electronic properties of the reagents on their different extractabilities. (authors)

Sasaki, Y.; Kitatsuji, Y.; Hirata, M.; Kimura, T. [Japan Atomic Energy Agency, Tokai-mura, Ibaraki 319-1195 (Japan); Yoshizuka, K. [The University of Kitakyushu, Wakamatsu, Kitakyushu, Fukuoka 808-0135 (Japan)

2008-07-01T23:59:59.000Z

370

Fission of light actinides: Th232(n,f) and Pa231(n,f) reactions  

Science Journals Connector (OSTI)

A model to describe fission on light actinides, which takes into account transmission through a triple-humped fission barrier with absorption, is proposed. The fission probability derived in the WKB approximation within an optical model for fission has been incorporated into the statistical model of nuclear reactions. The complex resonant structure in the first-chance neutron-induced fission cross sections of Th232 and Pa231 nuclei has been reproduced by the proposed model. Consistent sets of parameters describing the triple-humped fission barriers of Th233 and Pa232 have been obtained. The results confirm the attribution of the gross resonant structure in the fission probability of these light actinides to partially damped vibrational states in the second well and undamped vibrational states in the third well of the corresponding fission barriers.

M. Sin; R. Capote; A. Ventura; M. Herman; P. ObložinskÝ

2006-07-27T23:59:59.000Z

371

Transmutation characteristics of minor actinides in a low aspect ratio tokamak fusion reactor  

Science Journals Connector (OSTI)

Abstract The transmutation characteristics of minor actinides in the transmutation reactor of a low aspect ratio (LAR) tokamak are investigated. One-dimensional neutron transport and burn-up calculations coupled with a tokamak systems analysis were performed to determine optimal system parameters. The dependence of the transmutation characteristics, including the neutron multiplication factor, produced power, and the transmutation rate, on the aspect ratio A in the range of 1.5–2.0 was examined. By adding Pu239 to the transmutation blanket as a neutron multiplication material, it was shown that a single transmutation reactor producing a fusion power of 150 MWth can destroy minor actinides contained in the spent fuels for more than 38 units of 1 GWe pressurized water reactors (PWRs) while producing a power in the range of 1.8–6.8 GWth.

B.G. Hong; S.Y. Moon

2014-01-01T23:59:59.000Z

372

Clean Cities: Clean Cities Conferences and Workshops  

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

Conferences and Workshops Conferences and Workshops to someone by E-mail Share Clean Cities: Clean Cities Conferences and Workshops on Facebook Tweet about Clean Cities: Clean Cities Conferences and Workshops on Twitter Bookmark Clean Cities: Clean Cities Conferences and Workshops on Google Bookmark Clean Cities: Clean Cities Conferences and Workshops on Delicious Rank Clean Cities: Clean Cities Conferences and Workshops on Digg Find More places to share Clean Cities: Clean Cities Conferences and Workshops on AddThis.com... Conferences & Workshops Clean Cities 20th Anniversary Electric Vehicle Community Readiness Stakeholder Summit Waste-to-Wheels Plug-In Vehicle & Infrastructure Fuel & Vehicle Strategy Clean Cities Conferences and Workshops Clean Cities offers conferences and workshops about alternative fuels and

373

Solid-State Lighting: Conferences and Meetings  

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

Conferences and Meetings to Conferences and Meetings to someone by E-mail Share Solid-State Lighting: Conferences and Meetings on Facebook Tweet about Solid-State Lighting: Conferences and Meetings on Twitter Bookmark Solid-State Lighting: Conferences and Meetings on Google Bookmark Solid-State Lighting: Conferences and Meetings on Delicious Rank Solid-State Lighting: Conferences and Meetings on Digg Find More places to share Solid-State Lighting: Conferences and Meetings on AddThis.com... Conferences & Meetings Past Conferences Presentations Publications Webcasts Videos Tools Conferences and Meetings DOE organizes three annual workshops to bring together a diverse gathering of participants-government, industry, academia, research institutions, energy efficiency organizations, utilities, retailers, and designers-to

374

Influence of microorganisms on the oxidation state distribution of multivalent actinides under anoxic conditions  

SciTech Connect (OSTI)

The fate and potential mobility of multivalent actinides in the subsurface is receiving increased attention as the DOE looks to cleanup the many legacy nuclear waste sites and associated subsurface contamination. Plutonium, uranium and neptunium are the near-surface multivalent contaminants of concern and are also key contaminants for the deep geologic disposal of nuclear waste. Their mobility is highly dependent on their redox distribution at their contamination source as well as along their potential migration pathways. This redox distribution is often controlled, especially in the near-surface where organic/inorganic contaminants often coexist, by the direct and indirect effects of microbial activity. Under anoxic conditions, indirect and direct bioreduction mechanisms exist that promote the prevalence of lower-valent species for multivalent actinides. Oxidation-state-specific biosorption is also an important consideration for long-term migration and can influence oxidation state distribution. Results of ongoing studies to explore and establish the oxidation-state specific interactions of soil bacteria (metal reducers and sulfate reducers) as well as halo-tolerant bacteria and Archaea for uranium, neptunium and plutonium will be presented. Enzymatic reduction is a key process in the bioreduction of plutonium and uranium, but co-enzymatic processes predominate in neptunium systems. Strong sorptive interactions can occur for most actinide oxidation states but are likely a factor in the stabilization of lower-valent species when more than one oxidation state can persist under anaerobic microbiologically-active conditions. These results for microbiologically active systems are interpreted in the context of their overall importance in defining the potential migration of multivalent actinides in the subsurface.

Reed, Donald Timothy [Los Alamos National Laboratory; Borkowski, Marian [Los Alamos National Laboratory; Lucchini, Jean - Francois [Los Alamos National Laboratory; Ams, David [Los Alamos National Laboratory; Richmann, M. K. [Los Alamos National Laboratory; Khaing, H. [Los Alamos National Laboratory; Swanson, J. S. [Los Alamos National Laboratory

2010-12-10T23:59:59.000Z

375

Averaged number of prompt neutrons calculus for photo-fission of actinides  

E-Print Network [OSTI]

The empirical calculations of the averaged number of prompt neutrons for photofission of 232Th, 233U, 234U, 235U, 236U, 238U, 237Np, 239Pu and 241Am actinides were done as a function of excitation energy, mass and charge of the nucleus, which can be used to evaluate the prompt neutrons for photofission of nuclides for which no or scarce data is available.

A. I. Lengyel; O. O. Parlag; V. T. Maslyuk; N. I. Romanyuk; O. O. Gritzay

2014-11-05T23:59:59.000Z

376

Electronic Structure of Transition Metal Clusters and Actinide Complexes and Their Reactivity  

SciTech Connect (OSTI)

Our research in this area since October 2007 has resulted in seven completed publications and more papers of the completed work are in progress. Our work during this period principally focused on actinide complexes with secondary emphasis on spectroscopic properties and electronic structure of metal complexes. As the publications are available online with all of the details of the results, tables and figures, we are providing here only a brief summary of major highlights, in each of the categories.

Balasubramanian, K

2008-10-06T23:59:59.000Z

377

Separators for electrochemical cells  

DOE Patents [OSTI]

Provided are separators for use in an electrochemical cell comprising (a) an inorganic oxide and (b) an organic polymer, wherein the inorganic oxide comprises organic substituents. Preferably, the inorganic oxide comprises an hydrated aluminum oxide of the formula Al.sub.2O.sub.3.xH.sub.2O, wherein x is less than 1.0, and wherein the hydrated aluminum oxide comprises organic substituents, preferably comprising a reaction product of a multifunctional monomer and/or organic carbonate with an aluminum oxide, such as pseudo-boehmite and an aluminum oxide. Also provided are electrochemical cells comprising such separators.

Carlson, Steven Allen; Anakor, Ifenna Kingsley

2014-11-11T23:59:59.000Z

378

Meals included in Conference Registrations  

E-Print Network [OSTI]

Meals included in Conference Registrations Meals included as part of the cost of a conference the most reasonable rates are obtained. Deluxe hotels and motels should be avoided. GSA rates have been for Georgia high cost areas. 75% of these amounts would be $21 for non- high cost areas and $27 for high cost

Arnold, Jonathan

379

NC CSC Open Science Conference  

Broader source: Energy.gov [DOE]

This three-day conference will bring the regional climate research community (North Central region universities, DOI agencies, and other research institutions) and stakeholders, including local, federal, and tribal resource managers and leaders, to foster productive engagement, interactions, and involvement with the North Central Climate Science Center (NC CSC). The conference will strive to identify emerging research issues and topics.

380

Conference on Foundry Steel Melting  

Science Journals Connector (OSTI)

... British Iron and Steel Research Association held, at Ashorne Hill, near Leamington Spa, a conference devoted to a consideration of recent scientific developments in melting steel in a manner and ... that of supplying bulk steel for ingot manufacture, and it was the object of this conference to discuss these differences with the view of guiding steel founders in the choice of ...

1949-10-22T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Actinide chemistry research supporting the Waste Isolation Pilot Plant (WIPP): FY94 results  

SciTech Connect (OSTI)

This document contains six reports on actinide chemistry research supporting the Waste Isolation Pilot Plant (WIPP). These reports, completed in FY94, are relevant to the estimation of the potential dissolved actinide concentrations in WIPP brines under repository breach scenarios. Estimates of potential dissolved actinide concentrations are necessary for WIPP performance assessment calculations. The specific topics covered within this document are: the complexation of oxalate with Th(IV) and U(VI); the stability of Pu(VI) in one WIPP-specific brine environment both with and without carbonate present; the solubility of Nd(III) in a WIPP Salado brine surrogate as a function of hydrogen ion concentration; the steady-state dissolved plutonium concentrations in a synthetic WIPP Culebra brine surrogate; the development of a model for Nd(III) solubility and speciation in dilute to concentrated sodium carbonate and sodium bicarbonate solutions; and the development of a model for Np(V) solubility and speciation in dilute to concentrated sodium Perchlorate, sodium carbonate, and sodium chloride media.

Novak, C.F. [ed.

1995-08-01T23:59:59.000Z

382

Long-term test results from a West Valley actinide-doped reference glass  

SciTech Connect (OSTI)

Results from drip tests designed to simulate unsaturated conditions in the proposed Yucca Mountain Repository are reported for an actinide-doped glass (reference glass ATM-10) used as a model waste form. These tests have been ongoing for nearly 7 years, with data collected on solution composition (including transuranics), colloid formation and disposition, glass corrosion layers, and solid secondary phases. This test is unique because of its long elapsed time, high content of thorium and transuranics, use of actual groundwater from the proposed site area, use of contact between the glass and sensitized stainless steel in the test, and the variety of analytical procedures applied to the components. Some tests have been terminated, and scanning electron microscopy (SEM) and analytical transmission electron microscopy (AEM) were used to directly measure glass corrosion and identify secondary phases. Other tests remain ongoing, with periodic sampling of the water that had contacted the glass. The importance of integrated testing has been demonstrated, as complex interactions between the glass, the groundwater, and the sensitized stainless steel have been observed. Secondary phases include smectite clay, iron silicates, and brockite. Actinides, except neptunium, concentrate into stable secondary phases. The release of actinides is then controlled by the behavior of these phases.

Fortner, J.A.; Gerding, T.J.; Bates, J.K.

1995-07-01T23:59:59.000Z

383

Fundamental Thermodynamics of Actinide-Bearing Mineral Waste Forms - Final Report  

SciTech Connect (OSTI)

The end of the Cold War raised the need for the technical community to be concerned with the disposition of excess nuclear weapon material. The plutonium will either be converted into mixed-oxide fuel for use in nuclear reactors or immobilized in glass or ceramic waste forms and placed in a repository. The stability and behavior of plutonium in the ceramic materials as well as the phase behavior and stability of the ceramic material in the environment is not well established. In order to provide technically sound solutions to these issues, thermodynamic data are essential in developing an understanding of the chemistry and phase equilibria of the actinide-bearing mineral waste form materials proposed as immobilization matrices. Mineral materials of interest include zircon, zirconolite, and pyrochlore. High temperature solution calorimetry is one of the most powerful techniques, sometimes the only technique, for providing the fundamental thermodynamic data needed to establish optimum material fabrication parameters, and more importantly understand and predict the behavior of the mineral materials in the environment. The purpose of this project is to experimentally determine the enthalpy of formation of actinide orthosilicates, the enthalpies of formation of actinide substituted zirconolite and pyrochlore, and develop an understanding of the bonding characteristics and stabilities of these materials.

Williamson, Mark A.; Ebbinghaus, Bartley B.; Navrotsky, Alexandra

2001-03-01T23:59:59.000Z

384

LEAP 1992: Conference summary  

SciTech Connect (OSTI)

We present a summary of the many new results in antiproton ({bar p}) physics presented at the LEAP `92 conference, in the areas of meson spectroscopy, {bar N}N scattering, annihilation and spin observables, strangeness and charm production, {bar N} annihilation in nuclei, atomic physics with very low energy {bar p}`s, the exploration of fundamental symmetries and interactions with {bar p} (CP, T, CPT, gravitation), and the prospects for new {bar p} facilities at ultralow energies or energies above the LEAR regime ({ge} 2 GeV/c).

Dover, C.B.

1992-12-01T23:59:59.000Z

385

LEAP 1992: Conference summary  

SciTech Connect (OSTI)

We present a summary of the many new results in antiproton ([bar p]) physics presented at the LEAP '92 conference, in the areas of meson spectroscopy, [bar N]N scattering, annihilation and spin observables, strangeness and charm production, [bar N] annihilation in nuclei, atomic physics with very low energy [bar p]'s, the exploration of fundamental symmetries and interactions with [bar p] (CP, T, CPT, gravitation), and the prospects for new [bar p] facilities at ultralow energies or energies above the LEAR regime ([ge] 2 GeV/c).

Dover, C.B.

1992-12-01T23:59:59.000Z

386

INTERNATIONAL OPEN GOVERNMENT DATA CONFERENCE  

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

OPEN GOVERNMENT DATA CONFERENCE July 10 - 12, 2012 http://www.data.gov/conference Sponsored by Data.gov and the World Bank EMPOWERING PEOPLE "Sunlight is the best disinfectant." - Justice Louis Brandeis THE WORLD B ANK data.worldbank.org | @worldbankdata Welcome Attendees From Five Continents Around The World to the International Open Government Data Conference We Will Make History Together Thank You to our Speakers, International Guests Table of Contents: Conference Agenda Speakers Parking & Directions Restaurants Attractions p.02 p.08 p.37 p.38 p.39 InternatIonal open Government Data ConferenCe | 01 What to Know Meet Up and Make Connections Did you hear an interesting speaker? Find someone doing similar work? See a solution that you want to find out more about? Take

387

LANL Foundation conference draws teachers  

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

LANL Foundation Conference Draws Teachers LANL Foundation Conference Draws Teachers Community Connections: Our link to Northern New Mexico Communities Latest Issue:Dec. 2013 - Jan. 2014 All Issues » submit LANL Foundation conference draws teachers The conference was made possible by a financial investment from LANS, LLC in the Foundation's Inquiry Science Education Consortium and from the Department of Energy. November 1, 2012 dummy image Read our archives Contacts Editor Linda Anderman Email Community Programs Office Kurt Steinhaus Email Close to 1,500 people, including teachers, principals, and others, attended the recent Los Alamos National Laboratory Foundation's 15th annual education conference. The speakers included Harry K. and Rosemary Wong on the subject of ""Effective Teaching."

388

Hydrogen isotope separation  

DOE Patents [OSTI]

A system of four cryogenic fractional distillation columns interlinked with two equilibrators for separating a DT and hydrogen feed stream into four product streams, consisting of a stream of high purity D.sub.2, DT, T.sub.2, and a tritium-free stream of HD for waste disposal.

Bartlit, John R. (Los Alamos, NM); Denton, William H. (Abingdon, GB3); Sherman, Robert H. (Los Alamos, NM)

1982-01-01T23:59:59.000Z

389

Gordon Research Conferences  

Science Journals Connector (OSTI)

...J. K. Beasley, "Theory of water transport in RO membranes." 12...separa-tion"; D. Bhattacharya, "Recovery and water reuse with low pressure thin film composite membranes." Recovery and removal of trace organics from...

Alexander M. Cruickshank

1983-03-04T23:59:59.000Z

390

Gordon Research Conferences  

Science Journals Connector (OSTI)

...Polysac-charide adsorbents for ethanol-water separation." Membrane processes...boundaries in semiconduc-tors:" Gallium arsenide thin films (C. B. Duke, session...transduction." 20 August. Ion and water movements across epithelial membranes...

Alexander M. Cruickshank

1981-03-13T23:59:59.000Z

391

Gordon Research Conferences  

Science Journals Connector (OSTI)

...developments in water-borne coatings...Hoy, "Separating solubility parameters of polymers...experiments." 18 July. Gallium arsenide (R. K. Wil-lardson...processes in surface waters"; T. Graedel...Thermodesorption of water from glass fiber...

Alexander M. Cruickshank

1985-03-01T23:59:59.000Z

392

Conference Dates: November 21-24, 2013 Conference Venue: Administration Building, National Chengchi University  

E-Print Network [OSTI]

Conference Dates: November 21-24, 2013 Conference Venue: Administration Building, National Chengchi and Development #12;Welcome Message from Conference Honorary Chair On behalf of ILAS, a co-host of this conference with National Chengchi University, I would like to welcome you all to the 27th Pacific Asia Conference

393

The technical and economic impact of minor actinide transmutation in a sodium fast reactor  

SciTech Connect (OSTI)

Within the frame work of the French National Act of June 28, 2006 pertaining to the management of high activity, long-lived radioactive waste, one of the proposed processes consists in transmuting the Minor Actinides (MA) in the radial blankets of a Sodium Fast Reactor (SFR). With this option, we may assess the additional cost of the reactor by comparing two SFR designs, one with no Minor Actinides, and the other involving their transmutation. To perform this exercise, we define a reference design called SFRref, of 1500 MWe that is considered to be representative of the Reactor System. The SFRref mainly features a pool architecture with three pumps, six loops with one steam generator per loop. The reference core is the V2B core that was defined by the CEA a few years ago for the Reactor System. This architecture is designed to meet current safety requirements. In the case of transmutation, for this exercise we consider that the fertile blanket is replaced by two rows of assemblies having either 20% of Minor Actinides or 20% of Americium. The assessment work is performed in two phases. - The first consists in identifying and quantifying the technical differences between the two designs: the reference design without Minor Actinides and the design with Minor Actinides. The main differences are located in the reactor vessel, in the fuel handling system and in the intermediate storage area for spent fuel. An assessment of the availability is also performed so that the impact of the transmutation can be known. - The second consists in making an economic appraisal of the two designs. This work is performed using the CEA's SEMER code. The economic results are shown in relative values. For a transmutation of 20% of MA in the assemblies (S/As) and a hypothesis of 4 kW allowable for the washing device, there is a large external storage demanding a very long cooling time of the S/As. In this case, the economic impact may reach 5% on the capital part of the Levelized Unit Electricity Cost (LUEC). A diminished concentration at 10% of MA, reduces the size of the external storage and the cooling time of the assemblies becomes compatible with the management of the irradiated fuel. Even with a low allowable power for the washing device, the economic impact on the capital cost is less than 2.5%. (authors)

Gautier, G. M.; Morin, F. [Alternative Energy and Atomic Energy Commission, CEA, DEN, F - 13108 St Paul lez Durance (France); Dechelette, F.; Sanseigne, E. [Alternative Energy and Atomic Energy Commission, CEA, DEN DTN, F - 13108 St Paul lez Durance (France); Chabert, C. [Alternative Energy and Atomic Energy Commission, CEA, DEN, F - 13108 St Paul lez Durance (France)

2012-07-01T23:59:59.000Z

394

International Conference Synchrotron Radiation Instrumentation SRI `94  

SciTech Connect (OSTI)

This report contains abstracts for the international conference on Synchrotron Radiation Instrumentation at Brookhaven National Laboratory.

Not Available

1994-10-01T23:59:59.000Z

395

conference rates Summer 2014 Policy Statement  

E-Print Network [OSTI]

conference rates Summer 2014 Policy Statement University Catering and Conferences is an auxiliary and organizations holding education- ally related meetings and events on campus. conference rateS (all rates are per occupies, including lounge. Conference staff available for assistance 24 hours per day. Room-only rates

Oregon, University of

396

How to Write and Submit a Conference  

E-Print Network [OSTI]

How to Write and Submit a Conference Paper OWISE Graduate Seminar September 17, 2010 Jenna P to this audience? · What do abstracts and papers for this conference look like (check out past conference proceedings)? · Do you know anyone who has had a paper accepted for this conference? · Consider adding a co

Selmic, Sandra

397

conference rates Summer 2013 Policy Statement  

E-Print Network [OSTI]

conference rates Summer 2013 Policy Statement University Catering and Conferences is an auxiliary and organizations holding education- ally related meetings and events on campus. conference rateS (all rates are per occupies, including lounge. Conference staff available for assistance 24 hours per day. Room-only rates

Oregon, University of

398

OSU Conference Services Oregon State University  

E-Print Network [OSTI]

OSU Conference Services Oregon State University 100 LaSells Stewart Center Corvallis, Oregon 97331 T 541-737-9300 | F 541-737-9315 | http://oregonstate.edu/conferences/ OSU Conference Services List of Services The team of event professionals at OSU Conference Services will work with you to make your

Escher, Christine

399

conference rates Summer 2012 Policy Statement  

E-Print Network [OSTI]

conference rates Summer 2012 Policy Statement University Catering and Conferences is an auxiliary holding educationally related meetings and events on campus. conference rateS (all rates are per person lounge. Barnhart Hall service includes private bathrooms/showers. Conference staff available

Oregon, University of

400

Conference Purpose: The 9th INTECOL International  

E-Print Network [OSTI]

Conference Purpose: The 9th INTECOL International Wetlands Conference will provide a platform. This conference seeks to share integrated solutions for sustainable management of wetland resources in a complex Attend: The conference provides an interdis- ciplinary setting for participants to review cutting edge

Slatton, Clint

Note: This page contains sample records for the topic "actinide separations conference" 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

Synergistic selective extraction of actinides(III) over lanthanides from nitric acid using new aromatic diorganyldithiophosphinic acids and neutral organophosphorus compounds  

SciTech Connect (OSTI)

New aromatic dithiophosphinic acids (R{sub 2}PSSH) with R = C{sub 6}H{sub 5{sup {minus}}}, ClC{sub 6}H{sub 4{sup {minus}}}, FC{sub 6}H{sub 4{sup {minus}}} and CH{sub 3}C{sub 6}H{sub 4{sup {minus}}} were synthesized, characterized and tested as potential separating agents for trivalent actinides over lanthanides. The extraction of Am(III), Eu(III) and other lanthanides was carried out from nitric acid medium with mixtures of R{sub 2}PSSHs and neutral organophosphorus compounds. There was no detectable extraction when R{sub 2}PSSHs were used alone as extractants for either Am(III) or Eu(III) (D{sub Am,Eu} < 10{sup {minus}3}) under the experimental conditions used in this study. High separation factors (D{sub Am}/D{sub Eu} > 20) with D{sub Am} > 1 were achieved in the nitric acid range 0.1--1 mol/L by means of a synergistic mixture of bis(chlorophenyl)dithiophosphinic acid + tributylphosphate (TBP), trioctylphosphine oxide (TOPO) or tributylphosphine oxide (TBPO). The high radiation resistance (up to 10{sup 6} Gy absorbed {gamma}-doses) of the extractants was also demonstrated.

Modolo, G.; Odoj, R. [Forschungszentrum Juelich GmbH (Germany). Inst. fuer Sicherheitsforschung und Reaktortechnik

1999-01-01T23:59:59.000Z

402

Proceedings: National conference on environmental externalities  

SciTech Connect (OSTI)

This report is the proceedings of the National Conference on Environmental Externalities. A environmental externality is the environmental impact of a process or a plant that society must endure. It is a social cost and is paid, but not by the company who produced it or the company`s customers who endure it. The main purpose of this report is to gather the many designs and ideas of how and why to internalize the externalities into the pricing systems of the public utility commissions, especially that of the electric utilities. Economic and sociological aspects of the internalization of these externalities are given in these proceedings. Individual papers are processed separately for databases. (MB)

Not Available

1990-12-31T23:59:59.000Z

403

The Asia-Pacific coal technology conference  

SciTech Connect (OSTI)

The Asia-Pacific coal technology conference was held in Honolulu, Hawaii, November 14--16, 1989. Topics discussed included the following: Expanded Horizons for US Coal Technology and Coal Trade; Future Coal-Fired Generation and Capacity Requirements of the Philippines; Taiwan Presentation; Korean Presentation; Hong Kong Future Coal Requirements; Indonesian Presentation; Electric Power System in Thailand; Coal in Malaysia -- A Position Paper; The US and Asia: Pacific Partners in Coal and Coal Technology; US Coal Production and Export; US Clean Coal Technologies; Developments in Coal Transport and Utilization; Alternative/Innovative Transport; Electricity Generation in Asia and the Pacific: Power Sector Demand for Coal, Oil and Natural Gas; Role of Clean Coal Technology in the Energy Future of the World; Global Climate Change: A Fossil Energy Perspective; Speaker: The Role of Coal in Meeting Hawaii's Power Needs; and Workshops on Critical Issues Associated with Coal Usage. Individual topics are processed separately for the data bases.

Not Available

1990-02-01T23:59:59.000Z

404

LM Training & Conferences | Department of Energy  

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

LM Training & Conferences LM Training & Conferences LM Training & Conferences Current Training and Conferences Attended by LM Employees Solar Power International Conference (Chicago, IL; October 21-24, 2013) 2014 National Environmental Justice Conference and Training Program Save-the-Date (English) 2014 National Environmental Justice Conference and Training Program Save-the-Date(Spanish) Past Training and Conferences Attended by LM Employees IAEA Workshop, Note: There is also a write up in the LM Quarterly Program Update. Alaska Forum on Environment (Anchorage, AK; February 2-4 2013) Waste Management Conference (Phoenix, AZ; February 24-28, 2013) National Adaptation Forum (Denver, CO; April 2-3, 2013) National Environmental Justice Conference (Washington, DC; April 3-5, 2013)

405

TheTheTheTheThe Robert and Sarah Boote ConferenceRobert and Sarah Boote ConferenceRobert and Sarah Boote ConferenceRobert and Sarah Boote ConferenceRobert and Sarah Boote Conference  

E-Print Network [OSTI]

TheTheTheTheThe Robert and Sarah Boote ConferenceRobert and Sarah Boote ConferenceRobert and Sarah Boote ConferenceRobert and Sarah Boote ConferenceRobert and Sarah Boote Conference ininininin BooteRobert and Sarah BooteRobert and Sarah BooteRobert and Sarah BooteRobert and Sarah Boote

Machery, Edouard

406

Advanced Separation Consortium  

SciTech Connect (OSTI)

The Center for Advanced Separation Technologies (CAST) was formed in 2001 under the sponsorship of the US Department of Energy to conduct fundamental research in advanced separation and to develop technologies that can be used to produce coal and minerals in an efficient and environmentally acceptable manner. The CAST consortium consists of seven universities - Virginia Tech, West Virginia University, University of Kentucky, Montana Tech, University of Utah, University of Nevada-Reno, and New Mexico Tech. The consortium brings together a broad range of expertise to solve problems facing the US coal industry and the mining sector in general. At present, a total of 60 research projects are under way. The article outlines some of these, on topics including innovative dewatering technologies, removal of mercury and other impurities, and modelling of the flotation process. 1 photo.

NONE

2006-01-01T23:59:59.000Z

407

Innovative Separations Technologies  

SciTech Connect (OSTI)

Reprocessing used nuclear fuel (UNF) is a multi-faceted problem involving chemistry, material properties, and engineering. Technology options are available to meet a variety of processing goals. A decision about which reprocessing method is best depends significantly on the process attributes considered to be a priority. New methods of reprocessing that could provide advantages over the aqueous Plutonium Uranium Reduction Extraction (PUREX) and Uranium Extraction + (UREX+) processes, electrochemical, and other approaches are under investigation in the Fuel Cycle Research and Development (FCR&D) Separations Campaign. In an attempt to develop a revolutionary approach to UNF recycle that may have more favorable characteristics than existing technologies, five innovative separations projects have been initiated. These include: (1) Nitrogen Trifluoride for UNF Processing; (2) Reactive Fluoride Gas (SF6) for UNF Processing; (3) Dry Head-end Nitration Processing; (4) Chlorination Processing of UNF; and (5) Enhanced Oxidation/Chlorination Processing of UNF. This report provides a description of the proposed processes, explores how they fit into the Modified Open Cycle (MOC) and Full Recycle (FR) fuel cycles, and identifies performance differences when compared to 'reference' advanced aqueous and fluoride volatility separations cases. To be able to highlight the key changes to the reference case, general background on advanced aqueous solvent extraction, advanced oxidative processes (e.g., volumetric oxidation, or 'voloxidation,' which is high temperature reaction of oxide UNF with oxygen, or modified using other oxidizing and reducing gases), and fluorination and chlorination processes is provided.

J. Tripp; N. Soelberg; R. Wigeland

2011-05-01T23:59:59.000Z

408

EM SSAB Conference Calls - November 19, 2009 | Department of...  

Office of Environmental Management (EM)

Call - November 19, 2009 More Documents & Publications EM SSAB Conference Calls - January 21, 2010 EM SSAB Conference Calls - July 9, 2009 EM SSAB Conference Calls - December 2...

409

FTCP Conference Call Minutes - December 11, 2013 | Department...  

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

1, 2013 FTCP Conference Call Minutes - December 11, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP...

410

FTCP Conference Call Minutes - October 30, 2013 | Department...  

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

Call Minutes 10-30-2013 More Documents & Publications FTCP Conference Call Minutes - December 11, 2013 FTCP Conference Call Minutes - January 22, 2014 FTCP Conference Call...

411

FTCP Conference Call Minutes - January 22, 2014 | Department...  

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

with FTCP and TQP. Conference Call Minutes 1-22-2014 More Documents & Publications FTCP Conference Call Minutes - February 26, 2014 FTCP Conference Call Minutes - December 11, 2013...

412

FY 2013 Conference Waiver - Emergency Management Issues Special...  

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

FY 2013 Conference Waiver - Emergency Management Issues Special Interest Group FY 2013 Conference Waiver - Emergency Management Issues Special Interest Group FY 2013 Conference...

413

FTCP Conference Call Minutes - October 17, 2012 | Department...  

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

17, 2012 FTCP Conference Call Minutes - October 17, 2012 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP...

414

EM SSAB Chairs Conference Calls | Department of Energy  

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

EM SSAB Chairs Conference Calls EM SSAB Chairs Conference Calls January 31, 2008 EM SSAB Conference Calls - January 31, 2008 Minutes and highlights of the Environmental Management...

415

FTCP Conference Call Minutes - June 19, 2013 | Department of...  

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

June 19, 2013 FTCP Conference Call Minutes - June 19, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from...

416

FTCP Conference Call Minutes - May 22, 2013 | Department of Energy  

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

May 22, 2013 FTCP Conference Call Minutes - May 22, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP...

417

FTCP Conference Call Minutes - August 21, 2013 | Department of...  

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

1, 2013 FTCP Conference Call Minutes - August 21, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP...

418

TEC Working Group Topic Groups Routing Conference Call Summaries...  

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

Routing Conference Call Summaries TEC Working Group Topic Groups Routing Conference Call Summaries CONFERENCE CALL SUMMARIES January 31, 2008 December 6, 2007 October 4, 2007...

419

TEC Working Group Topic Groups Security Conference Call Summaries...  

Office of Environmental Management (EM)

Security Conference Call Summaries TEC Working Group Topic Groups Security Conference Call Summaries Conference Call Summaries August 17, 2006 (Draft) July 18, 2006 (Draft) June...

420

FTCP Conference Call Minutes - March 27, 2013 | Department of...  

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

March 27, 2013 FTCP Conference Call Minutes - March 27, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from...

Note: This page contains sample records for the topic "actinide separations conference" 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

FTCP Conference Call Minutes - November 28, 2012 | Department...  

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

November 28, 2012 FTCP Conference Call Minutes - November 28, 2012 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates...

422

FTCP Conference Call Minutes - April 24, 2013 | Department of...  

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

April 24, 2013 FTCP Conference Call Minutes - April 24, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from...

423

FTCP Conference Call Minutes - July 16, 2014 | Department of...  

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

July 16, 2014 FTCP Conference Call Minutes - July 16, 2014 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from...

424

POWER-GEN Conference Presentation | Department of Energy  

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

POWER-GEN Conference Presentation POWER-GEN Conference Presentation POWER-GEN Conference Presentation More Documents & Publications U.S. Energy Association Presentation EEI...

425

FTCP Conference Call Minutes - July 17, 2013 | Department of...  

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

July 17, 2013 FTCP Conference Call Minutes - July 17, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from...

426

The Seventh Biennial Conference of the International Biogeography Society  

E-Print Network [OSTI]

6596 The Seventh Biennial Conference of the International2015 The biennial conferences of the IBS are a show- case ofpresentations at the upcoming conference in Bayreuth will

Gavin, Daniel G.; Beierkuhnlein, Carl

2014-01-01T23:59:59.000Z

427

FTCP Conference Call Minutes - December 19, 2012 | Department...  

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

9, 2012 FTCP Conference Call Minutes - December 19, 2012 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP...

428

FTCP Conference Call Minutes - February 20, 2013 | Department...  

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

0, 2013 FTCP Conference Call Minutes - February 20, 2013 FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP...

429

TEC Working Group Topic Groups Archives Protocols Conference...  

Office of Environmental Management (EM)

Conference Call Summaries TEC Working Group Topic Groups Archives Protocols Conference Call Summaries Conference Call Summaries May 13, 1999 April 8, 1999 March 1, 1999 More...

430

Spelman College 7th Annual Spelman College Leadership Conference  

Broader source: Energy.gov [DOE]

Theme for this year's conference is still being developed - last year, the conference focused on "best practices to help women achieve better personal and professional sustainability. Conference...

431

New Partners for Smart Growth Conference | Department of Energy  

Office of Environmental Management (EM)

New Partners for Smart Growth Conference is the nation's largest smart growth and sustainability conference. The three-day conference is themed, "Practical Tools and Innovative...

432

NETL: Gasification Systems - Gas Separation  

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

Separation Separation Ion-Transport Membrane Oxygen Separation Modules Ion-Transport Membrane Oxygen Separation Modules Gas separation unit operations represent major cost elements in gasification plants. The gas separation technology being supported in the DOE program promises significant reduction in cost of electricity, improved thermal efficiency, and superior environmental performance. Gasification-based energy conversion systems rely on two gas separation processes: (1) separation of oxygen from air for feed to oxygen-blown gasifiers; and (2) post-gasification separation of hydrogen from carbon dioxide following (or along with) the shifting of gas composition when carbon dioxide capture is required or hydrogen is the desired product. Research efforts include development of advanced gas separation

433

2006 environmental controls conference  

SciTech Connect (OSTI)

The two topics covered at the conference were: selective catalytic reduction (SCR) and selection non-catalytic reduction (SNCR) for NOx control, and techniques for managing sulfur trioxide. A total of 45 presentations are summarized on the NETL website of which 22 are available in full. These include keynote addresses for each of the two major topics. In addition four poster papers are listed. The papers are arranged in sections headed: regulatory considerations; overview of SCR/SNCR; managing SCR catalysts; gas monitoring and analysis; predictive performance tools; non-coal applications; layered SCR; flow distribution and modeling; hybrid systems; innovative applications; SO{sub 2} conversion to SO{sub 3}; SO{sub 3} overview; acid gas control issues; sorbent injection for acid gas migration; and effects of SO{sub 3} on mercury control.

NONE

2006-07-01T23:59:59.000Z

434

Conferences and courses  

Science Journals Connector (OSTI)

Future prospects 'Effective teaching and learning for the future: physics in schools and colleges' is the title of The Institute of Physics Education Group's annual conference planned for 25 - 27 March 1997 at the University of Leeds. Following on from the dynamic discussions of the 1995 and 1996 conferences, which dealt with the school - higher education interface, the 1997 meeting will focus on such questions as what content we should be presenting to physics students in schools and colleges, what effective teaching strategies we can employ and how we can support effective learning. To emphasize the interactive nature of the conference, and in particular the need to share experiences, the event will consist predominantly of working groups in sessions of around two hours' duration. Among the topics to be addressed by the groups will be the use of new technologies in teaching and learning, alternatives to practical work and approaches to maths for physics. Besides the working group sessions there will be a talk on the Management of Change by Ken Dobson (Honorary Editor of Physics Education) and an update on the Institute of Physics 16 - 19 curriculum review project by Bryan Chapman. Offers of contributions for the group and poster sessions were due by early October, but further details of the conference can be obtained from the Conference Department at The Institute of Physics, 76 Portland Place, London W1N 4AA (fax: 0171 470 4900). IOP courses Among the autumn events being organized by the Institute of Physics Education Department are an INSET course at the Royal Greenwich Observatory in Cambridge on 29 - 30 November 1996 and the traditional Physics Update, also to be held in Cambridge on 13 - 15 December. A fourth Physics in Perspective course for college and sixth-form physics students is to be held on 26 - 28 January, with topics such as astrophysics, medical imaging and the physics of ice cream on the menu. Details of all these courses may be obtained from Leila Solomon of the Education Department, The Institute of Physics, 76 Portland Place, London W1N 4AA. Edinburgh festival 1997 marks the eighth year of the Edinburgh International Science Festival, which has grown to become the largest event of its type in the world. The dates are 22 March - 6 April, and besides the main programme there will be the customary events for schools in February and March incorporating four Olympiads (in Edinburgh, Glasgow, Aberdeen and Dundee), demonstration talks and hands-on exhibitions. Among subjects for coverage at the festival will be 'What scientists don't know', '100 years of home electronics', 'The truth behind the X-files' and 'Ancient science and technology'. As part of the programme of science communication throughout the year, there will be an in-service training course in hands-on science for all school teachers entitled 'Twilight science', and Madlab (an electronic gadget workshop) is available to schools and groups to open up the world of circuits and soldering in a unique way. In addition the touring exhibition 'Megafun with Computers' helps students explore the wonder of computers, and the inflatable planetarium Starlab can be hired to demonstrate the delights of the night sky. The address for full details is: Edinburgh International Science Festival, 149 Rose Street, Edinburgh EH2 4LS (fax: 0131 220 3987; e-mail: esf@scifest.demon.co.uk). Learning in cyberspace A two-day conference and exhibition supported by the European Commission is being held in Manchester on 25 - 26 November 1996 to focus on European content and initiatives in Cyberspace learning. Organizers are the European Briefing Unit of the University of Bradford and Toucan Europe. Among the meeting topics are telematics for education and training, superhighways for education, educational software and multimedia, technology in the classroom and new visions of lifelong learning. Further information may be obtained from Pat Grosse, European Briefing Unit, University of Bradford, Bradford, West Yorkshire BD7 1DP (fax: 01274 385820). Addendum A few additional d

435

2010 conference flier.cdr  

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

State State of Environmental Justice in America 2010 Conference May 12-14, 2010 May 12-14, 2010 Environmental Justice definition and conference details on back For more information contact Melinda Downing, Environmental Justice Program Manager, at or John Rosenthall, Conference Coordinator at . melinda.downing@hq.doe.gov ejinamerica@hotmail.com Howard University School of Law 2900 Van Ness Street, NW Washington, D.C. 775 12th Street NW Washington, DC 20005 and Washington Marriott at Metro Center About Environmental Justice What Is Environmental Justice? The State of Environmental Justice in America 2010 Conference Environmental justice is the fair treatment and meaningful involvement of all people-regardless of race, ethnicity, income or education level-in environmental decision-making. It has been more than 25 years since the Warren County, North Carolina, protest

436

Manhattan Project: Solvay Physics Conference  

Office of Scientific and Technical Information (OSTI)

SOLVAY PHYSICS CONFERENCE SOLVAY PHYSICS CONFERENCE Brussels, Belgium (October 1933) Resources > Photo Gallery Solvay Physics Conference, Brussels, 1933 The Solvay Physics Conference, held in Brussels, Belgium, October 22-29, 1933. Attendees included two future key Manhattan Project scientists (Fermi and Lawrence), the future head of the Nazi atomic bomb program (Heisenberg), and numerous leading pre-war physicists. A partial list of those attending: Niels Bohr (seated, third from left) James Chadwick (seated, farthest right) J. B. Cockroft (middle row, third from right) Marie Curie (seated, fifth from left) Enrico Fermi (middle row, fifth from left) Werner Heisenberg (middle row, fourth from left) Ernest O. Lawrence (back row, second from right) Lise Meitner (seated, second from right)

437

2009 conference flyer.cdr  

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

2900 2900 Van Ness Street, NW Washington, D.C. 300 Army-Navy Drive Crystal City, Virginia 22202 and Doubletree Hotel - Crystal City Brought to you by: National Small Town Alliance U.S. Department of Energy U.S. Department of Agriculture Howard University School of Law U.S. Environmental Protection Agency · · · · · · · · · · http://www.LM.doe.gov/env_justice/conference.htm The State of Environmental Justice in America 2009 Conference May 27-29, 2009 May 27-29, 2009 Environmental Justice Definition and Conference Details on Back. About Environmental Justice What is Environmental Justice? The State of Environmental Justice in America 2009 Conference Environmental justice is the fair treatment and meaningful involvement of all people-regardless of race, ethnicity, income or education level-in environmental decision-making. It has been more than 25 years since the

438

PRESS RELEASE RARE FRUIT CONFERENCE  

E-Print Network [OSTI]

RELEASE RARE FRUIT CONFERENCE July 9 - 13, 2014 Sponsored by the Tropical Fruit & Vegetable Society of the Redland & the Fruit & Spice Park 24801 SW 187th Avenue, Homestead, Florida

Jawitz, James W.

439

OIGA Conference and Trade Show  

Broader source: Energy.gov [DOE]

Join more than 2,500 industry professionals from all over the country at the Oklahoma Indian Gaming Association's (OIGA) annual conference specifically devoted to all aspects of the Indian Gaming...

440

ITCN 49th Annual Conference  

Broader source: Energy.gov [DOE]

Inter-Tribal Council of Nevada (ITCN) is hosting its annual conference titled, "Making A Difference for Nevada Tribes." ITCN is a consortia of the 27 tribal communities throughout the state of...

Note: This page contains sample records for the topic "actinide separations conference" 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

26th Annual Users' Conference  

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

smttrrd.gif (846 bytes) Social Events s mttrrd.gif (846 bytes) Vendor Exhibits Conference Chairs: Bruce Clemens, Stanford University clemens@soe.stanford.edu Jo Sthr, IBM...

442

SRI2007 Conference - Contact Information  

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

Contact Information For further information about the conference, please click on the following link. E-mail Ms. Lee Ann Murphey or contact Ms. Lee Ann Murphey CAMDLSU 6980...

443

Fission barriers and half-lives of actinides in the quasi-molecular shape valley G. Royer, M. Jaffre, D. Moreau  

E-Print Network [OSTI]

Fission barriers and half-lives of actinides in the quasi-molecular shape valley G. Royer, M. Jaffr The energy of actinide nuclei in the fusionlike deformation valley has been determined from a liquid drop]. The fission shapes were firstly investigated long time ago by minimizing the sum of the Coulomb and surface

Boyer, Edmond

444

Gordon Research Conferences  

Science Journals Connector (OSTI)

...in ori-ented systems: application in life sci-ences and material sciences"; C...Separation of isotopes of liquid phase and gas phase thermal diffusion"; F. B. Hill...New developments in pro-duction scale gas chromatography." 15 August. (J. Penniman...

Alexander M. Cruickshank

1979-03-16T23:59:59.000Z

445

Gordon Research Conferences  

Science Journals Connector (OSTI)

...Separa-tions effected by macroporous media: GPC, ultrafiltration and the SDS gel...E. Strelow, "Partly non-aqueous media for accurate chemical analysis by ion exchange...Andrews, "Trifluoroethanol mix-tures as media for solvolysis"; I. L. Mador, "Oxyacetylations...

Alexander M. Cruickshank

1973-03-09T23:59:59.000Z

446

Gordon Research Conferences  

Science Journals Connector (OSTI)

...physical data and in-formation systems. 13 July. Artificial intelligence-frame...and biological information systems. 14 July. Voluntary and mandatory...extrac-tion: a powerful separation tool"; Tom-as Misek, "New...August. Behavior of particulate systems (N. N. Li, session chairman...

Alexander M. Cruickshank

1978-03-10T23:59:59.000Z

447

Fifteenth combustion research conference  

SciTech Connect (OSTI)

The BES research efforts cover chemical reaction theory, experimental dynamics and spectroscopy, thermodynamics of combustion intermediates, chemical kinetics, reaction mechanisms, combustion diagnostics, and fluid dynamics and chemically reacting flows. 98 papers and abstracts are included. Separate abstracts were prepared for the papers.

NONE

1993-06-01T23:59:59.000Z

448

Long-term risk from actinides in the environment: Modes of mobility. 1998 annual progress report  

SciTech Connect (OSTI)

'The mobility of actinides in surface soils is a key issue of concern at several DOE facilities in arid and semiarid environments, including Rocky Flats, Hanford, Nevada Test Site, Idaho National Engineering Laboratory, and Los Alamos National Laboratory and the Waste Isolation Pilot Plant (WIPP). Key sources of uncertainty in assessing Pu mobility are the magnitudes of mobility resulting from three modes of transport: (1) wind erosion, (2) water erosion, and (3) vertical migration. Each of these three processes depend on numerous environmental factors and they compete with one another, particularly for actinides in very shallow soils ({approximately} 1 \\265m). The overall goal of the study is to quantify the mobility of soil actinides from all three modes. The authors study is using field measurements, laboratory experiments, and ecological modeling to address these three processes at three DOE facilities where actinide kinetics are of concern: WIPP, Rocky Flats, and Hanford. Wind erosion is being measured with suite of monitoring equipment, water erosion is being studied with rainfall simulation experiments, vertical migration is being studied in controlled laboratory experiments, and the three processes are being integrated using ecological modeling. Estimates for clean up of soil actinides for the extensive tracts of DOE land range to hundreds of billion $ in the US Without studies of these processes, unnecessary clean-up of these areas may waste billions of dollars and cause irreparable ecological damage through the soil removal. Further, the outcomes of litigation against DOE are dependent on quantifying the mobility of actinides in surface soils. This report provides a summary of work for the first year of a 3-year project; subcontracts to collaborating institutions (Colorado State University and New Mexico State University) were not in place until late December 1997, and hence this report focuses on the results of the 5 months from January through May 1998. The major result to date is a review of literature on the potential for using soil concentrations of {sup 137}Cs and {sup 241}Am as tracers for plutonium in soil. Measurements of {sup 239}Pu contamination in the environment are expensive and time consuming, requiring radiochemical analysis and alpha spectroscopy. They evaluated the literature for measurements of {sup 137}Cs and {sup 241}Am, both of which are more cost-effectively measured by gamma spectrometry, as tracers for Pu in soil. Their results indicate that: significant positive correlation exists between Pu, Cs, and Am in soils and sediments at several locations including Rocky Flats, Los Alamos, and Hanford; atmospheric transport of Pu and Cs from worldwide fallout is essentially the same; the attachment of Pu and Cs to soil particles of various size is very similar; both Pu and Cs movement in the environment correlate well with soil and sediment particle movements; a significant correlation between Pu, Cs, and Am was found in soil as a function of depth, indicating similar vertical migration behavior (most of the activity of these radionuclides is confined to the top 10--20 cm of soil at virtually all locations); most Pu and Cs are strongly absorbed onto clay and organic matter in soils and there is essentially very little leaching of Pu, Am and Cs through soil columns. Based on the above information, they believe that {sup 137}Cs and {sup 241}Am are excellent tracers for both {sup 239}Pu and soil particle transport processes in clay, mineral bearing and/or organic soils. Therefore, Cs and Am would be good tracers for the proposed water erosion and vertical migration work, at least for both Rocky Flats and Hanford. The correlation between Pu and Cs may not be as strong in sandy soil (e.g. WIPP site), however, examination of more data is needed.'

Breshears, D.D.; Whicker, J.J. [Los Alamos National Lab., NM (US); Ibrahim, S.A.; Whicker, F.W.; Hakonson, T.E. [Colorado State Univ., Fort Collins, CO (US); Kirchner, T. [New Mexico State Univ., Las Cruces, NM (US)

1998-06-01T23:59:59.000Z

449

Principle and Uncertainty Quantification of an Experiment Designed to Infer Actinide Neutron Capture Cross-Sections  

SciTech Connect (OSTI)

An integral reactor physics experiment devoted to infer higher actinide (Am, Cm, Bk, Cf) neutron cross sections will take place in the US. This report presents the principle of the planned experiment as well as a first exercise aiming at quantifying the uncertainties related to the inferred quantities. It has been funded in part by the DOE Office of Science in the framework of the Recovery Act and has been given the name MANTRA for Measurement of Actinides Neutron TRAnsmutation. The principle is to irradiate different pure actinide samples in a test reactor like INL’s Advanced Test Reactor, and, after a given time, determine the amount of the different transmutation products. The precise characterization of the nuclide densities before and after neutron irradiation allows the energy integrated neutron cross-sections to be inferred since the relation between the two are the well-known neutron-induced transmutation equations. This approach has been used in the past and the principal novelty of this experiment is that the atom densities of the different transmutation products will be determined with the Accelerator Mass Spectroscopy (AMS) facility located at ANL. While AMS facilities traditionally have been limited to the assay of low-to-medium atomic mass materials, i.e., A < 100, there has been recent progress in extending AMS to heavier isotopes – even to A > 200. The detection limit of AMS being orders of magnitude lower than that of standard mass spectroscopy techniques, more transmutation products could be measured and, potentially, more cross-sections could be inferred from the irradiation of a single sample. Furthermore, measurements will be carried out at the INL using more standard methods in order to have another set of totally uncorrelated information.

G. Youinou; G. Palmiotti; M. Salvatorre; G. Imel; R. Pardo; F. Kondev; M. Paul

2010-01-01T23:59:59.000Z

450

Proceedings of the 2011 IEEE international vacuum electronics conference: book of abstracts  

SciTech Connect (OSTI)

This book includes a unique panorama of latest advances in vacuum electronic devices and applications covered in plenary talks, contributed papers and posters. High power microwaves and microwave tubes were the two themes for the pre-conference tutorials. Papers relevant to INIS are indexed separately.

NONE

2011-07-01T23:59:59.000Z

451

1987 Oak Ridge model conference: Proceedings: Volume I, Part 3, Waste Management  

SciTech Connect (OSTI)

A conference sponsored by the United States Department of Energy (DOE), was held on waste management. Topics of discussion were transuranic waste management, chemical and physical treatment technologies, waste minimization, land disposal technology and characterization and analysis. Individual projects are processed separately for the data bases. (CBS)

Not Available

1987-01-01T23:59:59.000Z

452

Second biomass conference of the Americas: Energy, environment, agriculture, and industry. Proceedings  

SciTech Connect (OSTI)

This volume provides the proceedings for the Second Biomass Conference of the Americas: Energy, Environment, Agriculture, and Industry which was held August 21-24, 1995. The volume contains copies of full papers as provided by the researchers. Individual papers were separately indexed and abstracted for the database.

NONE

1995-01-01T23:59:59.000Z

453

1987 Oak Ridge model conference: Proceedings: Volume I, Part 2, Waste Management  

SciTech Connect (OSTI)

A conference sponsored by the United States Department of Energy (DOE) was held on Waste Mangement. Topics discussed were waste stabilization technologies regulations and standards, innovative treatment technology, waste stabilization projects. Individual projects are processed separately for the data bases. (CBS)

Not Available

1987-01-01T23:59:59.000Z

454

Twenty-ninth ORNL/DOE conference on analytical chemistry in energy technology. Abstracts of papers  

SciTech Connect (OSTI)

This booklet contains separate abstracts of 55 individual papers presented at this conference. Different sections in the book are titled as follows: laser techniques; resonance ionization spectroscopy; laser applications; new developments in mass spectrometry; analytical chemistry of hazardous waste; and automation and data management. (PLG)

Not Available

1986-01-01T23:59:59.000Z

455

Energy in the urban environment. Proceedings of the 22. annual Illinois energy conference  

SciTech Connect (OSTI)

The conference addressed the energy and environmental challenges facing large metropolitan areas. The topics included a comparison of the environmental status of cities twenty years ago with the challenges facing today`s large cities, sustainable economic development, improving the energy and environmental infrastructure, and the changing urban transportation sector. Selected papers are indexed separately for inclusion in the Energy Science and Technology Database.

NONE

1994-12-31T23:59:59.000Z

456

Enhanced membrane gas separations  

SciTech Connect (OSTI)

An improved membrane gas separation process is described comprising: (a) passing a feed gas stream to the non-permeate side of a membrane system adapted for the passage of purge gas on the permeate side thereof, and for the passage of the feed gas stream in a counter current flow pattern relative to the flow of purge gas on the permeate side thereof, said membrane system being capable of selectively permeating a fast permeating component from said feed gas, at a feed gas pressure at or above atmospheric pressure; (b) passing purge gas to the permeate side of the membrane system in counter current flow to the flow of said feed gas stream in order to facilitate carrying away of said fast permeating component from the surface of the membrane and maintaining the driving force for removal of the fast permeating component through the membrane from the feed gas stream, said permeate side of the membrane being maintained at a subatmospheric pressure within the range of from about 0.1 to about 5 psia by vacuum pump means; (c) recovering a product gas stream from the non-permeate side of the membrane; and (d) discharging purge gas and the fast permeating component that has permeated the membrane from the permeate side of the membrane, whereby the vacuum conditions maintained on the permeate side of the membrane by said vacuum pump means enhance the efficiency of the gas separation operation, thereby reducing the overall energy requirements thereof.

Prasad, R.

1993-07-13T23:59:59.000Z

457

Explosively separable casing  

DOE Patents [OSTI]

An explosively separable casing including a cylindrical afterbody and a circular cover for one end of the afterbody is disclosed. The afterbody has a cylindrical tongue extending longitudinally from one end which is matingly received in a corresponding groove in the cover. The groove is sized to provide a pocket between the end of the tongue and the remainder of the groove so that an explosive can be located therein. A seal is also provided between the tongue and the groove for sealing the pocket from the atmosphere. A frangible holding device is utilized to hold the cover to the afterbody. When the explosive is ignited, the increase in pressure in the pocket causes the cover to be accelerated away from the afterbody. Preferably, the inner wall of the afterbody is in the same plane as the inner wall of the tongue to provide a maximum space for storage in the afterbody and the side wall of the cover is thicker than the side wall of the afterbody so as to provide a sufficiently strong surrounding portion for the pocket in which the explosion takes place. The detonator for the explosive is also located on the cover and is carried away with the cover during separation. The seal is preferably located at the longitudinal end of the tongue and has a chevron cross section.

Jacobson, Albin K. (Albuquerque, NM); Rychnovsky, Raymond E. (Livermore, CA); Visbeck, Cornelius N. (Livermore, CA)

1985-01-01T23:59:59.000Z

458

Conceptual configurations of an accelerator-driven subcritical system utilizing minor actinides  

SciTech Connect (OSTI)

This paper purposes an Accelerator-Driven Subcritical (ADS) system which utilizes the Minor Actinides (MAs) from the US spent nuclear fuel inventory. A mobile fuel concept with micro-particles suspended in the liquid metal is adopted in the purposed system to avoid difficulties of developing and testing new MAs solid fuel forms. Three ADS configurations were developed and analyzed using the Monte Carlo fuel burnup methodology. The analyses demonstrated the capabilities of the proposed system to utilize the MAs and to dispose of the US spent nuclear fuels. (authors)

Cao, Y.; Gohar, Y. [Nuclear Engineering Div., Argonne National Laboratory, 9700 South Cass Ave., IL 60439 (United States)

2012-07-01T23:59:59.000Z

459

Micro-Analysis of Actinide Minerals for Nuclear Forensics and Treaty Verification  

SciTech Connect (OSTI)

Micro-Raman spectroscopy has been demonstrated to be a viable tool for nondestructive determination of the crystal phase of relevant minerals. Collecting spectra on particles down to 5 microns in size was completed. Some minerals studied were weak scatterers and were better studied with the other techniques. A decent graphical software package should easily be able to compare collected spectra to a spectral library as well as subtract out matrix vibration peaks. Due to the success and unequivocal determination of the most common mineral false positive (zircon), it is clear that Raman has a future for complementary, rapid determination of unknown particulate samples containing actinides.

M. Morey, M. Manard, R. Russo, G. Havrilla

2012-03-22T23:59:59.000Z

460

Low-Temperature Synthesis of Actinide Tetraborides by Solid-State Metathesis Reactions  

SciTech Connect (OSTI)

The synthesis of actinide tetraborides including uranium tetraboride (UB,), plutonium tetraboride (PUB,) and thorium tetraboride (ThB{sub 4}) by a solid-state metathesis reaction are demonstrated. The present method significantly lowers the temperature required to {approx_equal}850 C. As an example, when UCl{sub 4}, is reacted with an excess of MgB{sub 2}, at 850 C, crystalline UB, is formed. Powder X-ray diffraction and ICP-AES data support the reduction of UCl{sub 3}, as the initial step in the reaction. The UB, product is purified by washing water and drying.

Lupinetti, Anthony J.; Garcia, Eduardo; Abney, Kent D.

2004-12-14T23:59:59.000Z

Note: This page contains sample records for the topic "actinide separations conference" 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

Actinides in metallic waste from electrometallurgical treatment of spent nuclear fuel.  

SciTech Connect (OSTI)

Argonne National Laboratory has developed a pyroprocessing-based technique for conditioning spent sodium-bonded nuclear-reactor fuel in preparation for long-term disposal. The technique produces a metallic waste form whose nominal composition is stainless steel with 15 wt.% Zr (SS-15Zr), up to {approx} 11 wt.% actinide elements (primarily uranium), and a few percent metallic fission products. Actual and simulated waste forms show similar eutectic microstructures with approximately equal proportions of iron solid solution phases and Fe-Zr intermetallics. This article reports on an analysis of simulated waste forms containing uranium, neptunium, and plutonium.

Janney, D. E.; Keiser, D. D., Jr.; Engineering Technology

2003-09-01T23:59:59.000Z

462

10th Radiation Physics and Protection Conference  

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

Atomic Energy Authority National Network of Radiation Physics Atomic Energy Authority National Network of Radiation Physics 10 th Radiation Physics and Protection Conference Special Topic Elements of Regulating Nuclear and Radiation Activities Egyptian Law 26 -30 November 2010 To be held at EAEA Headquarter Nasr City Cairo - Egypt (www.rphysp.com) INVITATION The conference organizing committee invites scientists from the Atomic Energy , Research Centers , Universities Institutes , and all those involved in radiation Physics and its Applications in Egypt , Arab countries and abroad to participate in scientific activities of the conference . The official working language of the conference in English Conference Honorary Chairman Conference Scientific Secretary

463

Blackout 2003: Electric System Working Group Technical Conference...  

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

Electric System Working Group Technical Conference - Comments and Recommendations Blackout 2003: Electric System Working Group Technical Conference - Comments and Recommendations...

464

Isotope separation apparatus  

DOE Patents [OSTI]

Isotope separation apparatus consisting of a plurality of cells disposed adjacent to each other in an evacuated container. A common magnetic field is established extending through all of the cells. A source of energetic electrons at one end of the container generates electrons which pass through the cells along the magnetic field lines. Each cell includes an array of collector plates arranged in parallel or in tandem within a common magnetic field. Sets of collector plates are disposed adjacent to each other in each cell. Means are provided for differentially energizing ions of a desired isotope by applying energy at the cyclotron resonant frequency of the desired isotope. As a result, the energized desired ions are preferentially collected by the collector plates.

Arnush, Donald (Rancho Palos Verdes, CA); MacKenzie, Kenneth R. (Pacific Palisades, CA); Wuerker, Ralph F. (Palos Verdes Estates, CA)

1980-01-01T23:59:59.000Z

465

Electrified Separation Processes in Industry  

E-Print Network [OSTI]

For any separation procedure in the chemical industry, a certain amount of reversible work in the form of free energy is required, as dictated by the second law of thermodynamics. Classical techniques for effecting liquid-phase separations...

Appleby, A. J.

1983-01-01T23:59:59.000Z

466

Advanced isotope separation  

SciTech Connect (OSTI)

The Study Group briefly reviewed the technical status of the three Advanced Isotope Separation (AIS) processes. It also reviewed the evaluation work that has been carried out by DOE's Process Evaluation Board (PEB) and the Union Carbide Corporation-Nuclear Division (UCCND). The Study Group briefly reviewed a recent draft assessment made for DOE staff of the nonproliferation implications of the AIS technologies. The staff also very briefly summarized the status of GCEP and Advanced Centrifuge development. The Study Group concluded that: (1) there has not been sufficient progress to provide a firm scientific, technical or economic basis on which to select one of the three competing AIS processes for full-scale engineering development at this time; and (2) however, should budgetary restraints or other factors force such a selection, we believe that the evaluation process that is being carried out by the PEB provides the best basis available for making a decision. The Study Group recommended that: (1) any decisions on AIS processes should include a comparison with gas centrifuge processes, and should not be made independently from the plutonium isotope program; (2) in evaluating the various enrichment processes, all applicable costs (including R and D and sales overhead) and an appropriate discounting approach should be included in order to make comparisons on a private industry basis; (3) if the three AIS programs continue with limited resources, the work should be reoriented to focus only on the most pressing technical problems; and (4) if a decision is made to develop the Atomic Vapor Laser Isotope Separation process, the solid collector option should be pursued in parallel to alleviate the potential program impact of liquid collector thermal control problems.

Not Available

1982-05-04T23:59:59.000Z

467

Selective separation of Eu{sup 3+} using polymer-enhanced ultrafiltration  

SciTech Connect (OSTI)

A process to selectively remove {sup 241}Am from liquid radioactive waste was investigated as an actinide separation method applicable to Hanford and other waste sites. The experimental procedures involved removal of Eu, a nonradioactive surrogate for Am, from aqueous solutions at pH 5 using organic polymers in conjunction with ultrafiltration. Commercially available polyacrylic acid (60,000 MW) and Pacific Northwest Laboratory`s (PNL) synthesized E3 copolymer ({approximately}10,000 MW) were tested. Test solutions containing 10 {mu}g/mL of Eu were dosed vath each polymer at various concentrations in order to bind Eu (i.e., by complexation and/or cation exchange) for subsequent rejection by an ultrafiltration coupon. Test solutions were filtered with and without polymer to determine if enhanced Eu separation could be achieved from polymer treatment. Both polymers significantly increased Eu removal. Optimum concentrations were 20 {mu}g/mL of polyacrylic acid and 100 {mu}g/mL of E3 for 100% Eu rejection by the Amicon PM10 membrane at 55 psi. In addition to enhancement of removal, the polymers selectively bound Eu over Na, suggesting that selective separation of Eu was possible. This suggests that polymer-enhanced ultrafiltration is a potential process for separation of {sup 241}Am from Hanford tank waste, further investigation of binding agents and membranes effective under very alkaline and high ionic strength is warranted. This process also has potential applications for selective separation of toxic metals from industrial process streams.

Norton, M.V.

1994-03-01T23:59:59.000Z

468

Thermodynamic Investigations of Aqueous Ternary Complexes for Am/Cm Separation  

E-Print Network [OSTI]

actinides like curium with heavy ions of such elements ascontaining curium would require forced cooling and heavy

Leggett, Christina Joy

2012-01-01T23:59:59.000Z

469

Separation Nanotechnology of Diethylenetriaminepentaacetic Acid...  

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

Nanotechnology of Diethylenetriaminepentaacetic Acid Bonded Magnetic Nanoparticles for Spent Nuclear Fuel. Separation Nanotechnology of Diethylenetriaminepentaacetic Acid Bonded...

470

Melted Murataite Ceramics Containing Simulated Actinide/Rare Earth Fraction of High Level Waste  

SciTech Connect (OSTI)

Murataite-based ceramics with three different chemical compositions containing simulated actinide/rare earth (RE) fraction of HLW were produced in a resistive furnace at a temperature of 1500 deg. C and two of them - in a cold crucible energized from a 5.28 MHz/10 kW high frequency generator. All the samples prepared in resistive furnace were composed of major murataite and minor perovskite, crichtonite, zirconolite, and pyrophanite/ilmenite. The samples produced in the cold crucible were composed of murataite, perovskite, crichtonite, and rutile. Higher content of perovskite and crichtonite in the cold crucible melted ceramic than in the ceramic with the same chemical composition but melted in resistive furnace may be due to higher temperature in the cold crucible (up to 1600-1650 deg. C) at which some fraction of murataite was subjected to decomposition yielding additional amount of perovskite and crichtonite. Method of melting may effect on elemental partitioning in the murataite-containing ceramics because light (Ce-group) REs enter preferably perovskite phase whereas Nd, Sm, and heavy (Y-group) REs are accommodated in the murataite polytypes. Thus, perovskite and murataite are major host phases for the Ce- and Y-group REs, respectively, whereas tetravalent actinides (U) enter murataite only.

Stefanovsky, S.V.; Ptashkin, A.G.; Knyazev, O.A.; Zen'kovskaya, M.S.; Stefanovsky, O.I. [State Unitary Enterprise SIA Radon, Moscow (Russian Federation); Yudintsev, S.V.; Nikonov, B.S.; Lapina, M.I. [Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian, Academy of Sciences (IGEM RAS), Moscow (Russian Federation)

2008-07-01T23:59:59.000Z

471

Preparations and mechanism of hydrolysis of ((8)annulene)actinide compounds. [Uranocene  

SciTech Connect (OSTI)

The mechanism of hydrolysis for bis(8)annulene actinide and lanthanide complexes has been studied in detail. The uranium complex, uranocene, decomposes with good pseudo-first order kinetics (in uranocene) in 1 M degassed solutions of H/sub 2/O in THF. Decomposition of a series of aryl-substituted uranocenes demonstrates that the hydrolysis rate is dependent on the electronic nature of the substituent (Hammett rho value = 2.1, r/sup 2/ = 0.999), with electron-withdrawing groups increasing the rate. When D/sub 2/O is substituted for H/sub 2/O, kinetic isotope effects of 8 to 14 are found for a variety of substituted uranocenes. These results suggest a pre-equilibrium involving approach of a water molecule to the central metal, followed by rate determining proton transfer to the eight membered ring and rapid decomposition to products. Each of the four protonations of the complex has a significant isotope effect. The product ratio of cyclooctatriene isomers formed in the hydrolysis varies, depending on the central metal of the complex. However, the general mechanism of hydrolysis, established for uranocene, can be extended to the hydrolysis and alcoholysis of all the (8)annulene complexes of the lanthanides and actinides.

Moore, R.M. Jr.

1985-07-01T23:59:59.000Z

472

Conference Rankings I promised to send you a website for CS conference rankings. It is at  

E-Print Network [OSTI]

Conference Rankings I promised to send you a website for CS conference rankings. It is at http://www.csconferenceranking.org/conferencerankings/alltopics.html It is not the only such ranking, but it seems to agree with what I have found in attending conferences to rank conference are anonymous only revealed after their death. The reason is that people have been

Allan, Vicki H.

473

The Conference Control Channel Protocol (CCCP): A scalable base for building conference control applications  

E-Print Network [OSTI]

The Conference Control Channel Protocol (CCCP): A scalable base for building conference control.Handley@cs.ucl.ac.uk Abstract This paper presents the Conference Control Channel Pro­ tocol (CCCP), a new scheme intended these as a basis for developing an architecture for the next generation of conference control applications

Handley, Mark

474

Conference scope and theme The 1st International Smart Design conference aims to provide a  

E-Print Network [OSTI]

Conference scope and theme The 1st International Smart Design conference aims to provide a timely. Posters The conference includes a poster session which will provide students with the opportunity for the best poster. Conference sponsored by PepsiCo Europe Poster submission / areas of interest Topics

Evans, Paul

475

GRADUATE CONFERENCE FUND The Graduate Conference Fund is sponsored by the Graduate Student Government and  

E-Print Network [OSTI]

GRADUATE CONFERENCE FUND The Graduate Conference Fund is sponsored by the Graduate Student Government and is intended to provide financial assistance for graduate students traveling to a conference Conference Fund The purpose of this funding is to supplement your primary funding from your department

Houston, Paul L.

476

Economist Conferences to hold international Life Science conference in Uppsala, Sweden  

E-Print Network [OSTI]

Economist Conferences to hold international Life Science conference in Uppsala, Sweden Press, Sweden When: November 22, 2012 Group and confere C of Tr In D C ThDelia Meth-Cohn, Editorial Director Speakers Official publication on the conference and Sweden's leading daily newspaper. PR & Media Sofia

477

ASM Conference on Prokaryotic Development  

SciTech Connect (OSTI)

Support was provided by DOE for the 2nd ASM Conference on Prokaryotic Development. The final conference program and abstracts book is attached. The conference presentations are organized around topics that are central to the current research areas in prokaryotic development. The program starts with topics that involve relatively simple models systems and ends with systems that are more complex. The topics are: i) the cell cycle, ii) the cytoskeleton, iii) morphogenesis, iv) developmental transcription, v) signaling, vi) multicellularity, and vii) developmental diversity and symbiosis. The best-studied prokaryotic development model systems will be highlighted at the conference through research presentations by leaders in the field. Many of these systems are also model systems of relevance to the DOE mission including carbon sequestration (Bradyrizobium, Synechococcus), energy production (Anabaena, Rhodobacter) and bioremediation (Caulobacter, Mesorhizobium). In addition, many of the highlighted organisms have important practical applications; the actinomycetes and myxobacteria produce antimicrobials that are of commercial interest. It is certain that the cutting-edge science presented at the conference will be applicable to the large group of bacteria relevant to the DOE mission.

Kaplan, H. B.

2005-07-13T23:59:59.000Z

478

1995 International Sherwood Fusion Theory Conference  

SciTech Connect (OSTI)

This book is a guide to the 1995 International Sherwood Fusion Theory Conference. It consists largely of abstracts of the oral and poster presentations that were to be made, and gives some general information about the conference and its schedule.

NONE

1995-07-01T23:59:59.000Z

479

OSTI Communications - ICSTI 2010 Annual Conference, Helsinki...  

Office of Scientific and Technical Information (OSTI)

APE 2013 Conference Berlin, Germany, January 29, 2013 Improving Access to U.S Department of Energy R&D Results: AgencyPublisher Collaboration APE Conference 2013 Brian A. Hitson,...

480

FTCP Conference Call Minutes – June 18, 2014  

Broader source: Energy.gov [DOE]

FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP Chair, Functional Area Qualification Standards updates, FTCP Operational Goals status, and ongoing NTC activities.

Note: This page contains sample records for the topic "actinide separations conference" 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.


481

FTCP Conference Call Minutes- September 18, 2013  

Broader source: Energy.gov [DOE]

FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP Chair, Functional Area Qualification Standards updates, FTCP Operational Goals status, and ongoing NTC activities.

482

AWEA Offshore Windpower Conference & Exhibition 2014 | Department...  

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

AWEA Offshore Windpower Conference & Exhibition 2014 AWEA Offshore Windpower Conference & Exhibition 2014 October 7, 2014 12:00PM EDT to October 8, 2014 9:00PM EDT Atlantic City,...

483

American Wind Energy Association Offshore WINDPOWER Conference...  

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

Offshore WINDPOWER Conference & Exhibition American Wind Energy Association Offshore WINDPOWER Conference & Exhibition October 7, 2014 9:00AM EDT to October 8, 2014 5:00PM EDT AWEA...

484

FTCP Conference Call Minutes – February 26, 2014  

Broader source: Energy.gov [DOE]

FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP Chair, Functional Area Qualification Standards updates, FTCP Operational Goals status, and ongoing NTC activities.

485

AISES National Conference | Department of Energy  

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

AISES National Conference AISES National Conference November 13, 2014 1:00PM EST to November 15, 2014 10:00PM EST Orlando, Florida Save the date for the 2014 American Indian...

486

FTCP Conference Call Minutes – September 17, 2014  

Broader source: Energy.gov [DOE]

FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP Chair, Functional Area Qualification Standards updates, FTCP Operational Goals status, and ongoing NTC activities.

487

FTCP Conference Call Minutes – August 20, 2014  

Broader source: Energy.gov [DOE]

FTCP Conference Call Minutes recorded monthly during FTCP conference calls. Topics of discussion include updates from FTCP Chair, Functional Area Qualification Standards updates, FTCP Operational Goals status, and ongoing NTC activities.

488

ASHRAE 2015 Winter Conference | Department of Energy  

Office of Environmental Management (EM)

ASHRAE 2015 Winter Conference ASHRAE 2015 Winter Conference January 24, 2015 9:00AM EST to January 28, 2015 5:00PM EST Chicago, Illinois Learn more....

489

Alaska Rural Energy Conference | Department of Energy  

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

Alaska Rural Energy Conference Alaska Rural Energy Conference September 23, 2014 12:00PM EDT to September 25, 2014 9:00PM EDT Fairbanks, AK http:www.akruralenergy.org...

490

2013 White House Tribal Nations Conference  

Broader source: Energy.gov [DOE]

On Wednesday, November 13, President Obama will host the White House Tribal Nations Conference at the Department of the Interior. The conference will provide leaders from the 566 federally...

491

New Partners for Smart Growth Conference  

Office of Energy Efficiency and Renewable Energy (EERE)

The program will span three full days with optional pre-conference events scheduled for Wednesday, January 28 and post-conference events scheduled for Sunday February 1. The main program will kick...

492

2014 Waste Management Conference | Department of Energy  

Office of Environmental Management (EM)

2014 Waste Management Conference 2014 Waste Management Conference April 9, 2014 - 11:06am Addthis What does this project do? Goal 2. Preserve, protect, and share records and...

493

Conceptual design of minor actinides burner with an accelerator-driven subcritical system.  

SciTech Connect (OSTI)

In the environmental impact study of the Yucca Mountain nuclear waste repository, the limit of spent nuclear fuel (SNF) for disposal is assessed at 70,000 metric tons of heavy metal (MTHM), among which 63,000 MTHM are the projected SNF discharge from U.S. commercial nuclear power plants though 2011. Within the 70,000 MTHM of SNF in storage, approximately 115 tons would be minor actinides (MAs) and 585 tons would be plutonium. This study describes the conceptual design of an accelerator-driven subcritical (ADS) system intended to utilize (burn) the 115 tons of MAs. The ADS system consists of a subcritical fission blanket where the MAs fuel will be burned, a spallation neutron source to drive the fission blanket, and a radiation shield to reduce the radiation dose to an acceptable level. The spallation neutrons are generated from the interaction of a 1 GeV proton beam with a lead-bismuth eutectic (LBE) or liquid lead target. In this concept, the fission blanket consists of a liquid mobile fuel and the fuel carrier can be LBE, liquid lead, or molten salt. The actinide fuel materials are dissolved, mixed, or suspended in the liquid fuel carrier. Therefore, fresh fuel can be fed into the fission blanket to adjust its reactivity and to control system power during operation. Monte Carlo analyses were performed to determine the overall parameters of an ADS system utilizing LBE as an example. Steady-state Monte Carlo simulations were studied for three fission blanket configurations that are similar except that the loaded amount of actinide fuel in the LBE is either 5, 7, or 10% of the total volume of the blanket, respectively. The neutron multiplication factor values of the three configurations are all approximately 0.98 and the MA initial inventories are each approximately 10 tons. Monte Carlo burnup simulations using the MCB5 code were performed to analyze the performance of the three conceptual ADS systems. Preliminary burnup analysis shows that all three conceptual ADS systems consume about 1.2 tons of actinides per year and produce 3 GW thermal power, with a proton beam power of 25 MW. Total MA fuel that would be consumed in the first 10 years of operation is 9.85, 11.80, or 12.68 tons, respectively, for the systems with 5, 7, or 10% actinide fuel particles loaded in the LBE. The corresponding annual MA fuel transmutation rate after reaching equilibrium at 10 years of operation is 0.83, 0.94, or 1.02 tons/year, respectively. Assuming that the ADS systems can be operated for 35 full-power years, the total MAs consumed in the three ADS systems are 30.6, 35.3, and 37.2 tons, respectively. For the three configurations, it is estimated that 3.8, 3.3, or 3.1 ADS system units are required to utilize the entire 115 tons of MA fuel in the SNF inventory, respectively.

Cao, Y.; Gohar, Y. (Nuclear Engineering Division)

2011-11-04T23:59:59.000Z

494

EJ Conference, Inc. Presents Environmental Justice  

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

Presents Presents Environmental Justice The State of in America 2010 Conference Message from the Department of Energy's Environmental Justice Program Manager Welcome to "The State of Environmental Justice in America 2010 Conference". This is the fourth conference in this series that began in 2007. The Department of Energy (DOE) is pleased to be a sponsor of this conference series. Environmental justice is actually a principal of American democracy that combines civil rights

495

Fiscal Year 2013 - Conference Reporting Activities | Department...  

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

mathematicalnumerical methods, numerical analysis, computational physics, high performance computing, and applied mathematics. This conference typically garners 300-400 papers...

496

2014 White House Tribal Nations Conference  

Broader source: Energy.gov [DOE]

President Obama will host the 2014 White House Tribal Nations Conference at the Capital Hilton in Washington, DC. The conference will provide leaders from the 566 federally recognized tribes the opportunity to interact directly with the President and members of the White House Council on Native American Affairs. Each federally recognized tribe will be invited to send one representative to the conference. Additional details about the conference will be released at a later date.

497

Gas separation process  

SciTech Connect (OSTI)

The method for production of high purity hydrogen and high purity carbon monoxide from a mixed gas stream comprising these components together with carbon dioxide and a zero to a minor amount of one or more other gaseous contaminants is described comprising the steps of: (a) passing the mixed gas stream into and through a first bed of solid adsorbent capable of selectively adsorbing carbon dioxide and water while discharging from the bed a dry CO/sub 2/-freed effluent; (b) introducing the dry CO/sub 2/-freed effluent into a cryogenic environment for cooling the same therein under conditions effective for condensation of at least the major part of the carbon monoxide present in the dry CO/sub 2/-freed effluent; (c) withdrawing from the cryogenic environment carbon monoxide of high purity; (d) separately withdrawing from the cryogenic environment an uncondensed first gas stream product comprised of crude hydrogen and subjecting the first gas stream product to selective adsorption of non-hydrogen components therefrom in a second bed of solid absorbent, while recovering from the second bed the non-sorbed fraction as a product stream of essentially pure hydrogen; (e) purging the second solid adsorbent bed to desorb non-hydrogen components sorbed therein in step (d), and withdrawing from the bed a gas stream comprising the desorbed non-hydrogen components.

Nicholas, D.M.; Hopkins, J.A.; Roden, T.M.; Bushinsky, J.P.

1988-03-22T23:59:59.000Z

498

Events and Conferences | Partnerships | ORNL  

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

University Partnerships University Partnerships Events and Conferences Success Stories Video Newsletters Staff Contacts Partnerships Home | Connect with ORNL | For Industry | Partnerships | Events and Conferences Events and Conferences Show Events for: to and/or search events 1-10 of 10 Results Prev 1 Next Nov 19 2013 SPARK! 2013 Technology Forum Market focused presentations on Oak Ridge National Lab's most promising inventions. 01:00 PM - 06:30 PM Oct 25 2013 CW 2013 Composites World - Carbon Fiber 12:00 AM - 04:00 PM Sep 04 2013 Energy Storage Solutions Industrial Symposium Energy Storage Solutions Industrial Symposium - Wednesday September 4, 2013 09:00 AM - 05:30 PM Mar 05 2013 Bridging the Gap 2013 Oak Ridge National Laboratory hosted the third annual Bridging the Gap on March 5-6, 2013. This event brought entrepreneurs, scientists, and

499

CERA Conference | Department of Energy  

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

CERA Conference CERA Conference CERA Conference February 14, 2007 - 10:15am Addthis Remarks as Prepared for Energy Secretary Samuel Bodman Thank you, Dan. I consider this event to be the premier gathering of opinion leaders on energy issues and I'm quite pleased to be here with all of you. What I plan to do this morning is first discuss how I see the world's energy challenges - and why President Bush believes addressing them must be at the top of our global agenda and then I'd like to focus on solutions and the best path forward. As we all well know, the demand for energy is rising rapidly and will continue to do so in the coming decades. I trust you've heard the sobering projections many times - for example, that by 2030 global energy consumption will grow by over 50 percent, with 70 percent of that growth

500

22nd Annual Transportation Research Conference  

E-Print Network [OSTI]

22nd Annual Transportation Research Conference May 24-25, 2011 Crowne Plaza St. Paul Riverfront for Transportation Studies 22nd Annual Transportation Research Conference Welcome to the Conference The University of Minnesota's Center for Transportation Studies is pleased to present its 22nd Annual Transportation Research

Minnesota, University of