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Note: This page contains sample records for the topic "lpf leak path" from the National Library of EnergyBeta (NLEBeta).
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1

Potential for containment leak paths through electrical penetration assemblies under severe accident conditions. [PWR; BWR  

Science Conference Proceedings (OSTI)

The leakage behavior of containments beyond design conditions and knowledge of failure modes is required for evaluation of mitigation strategies for severe accidents, risk studies, emergency preparedness planning, and siting. These studies are directed towards assessing the risk and consequences of severe accidents. An accident sequence analysis conducted on a Boiling Water Reactor (BWR), Mark I (MK I), indicated very high temperatures in the dry-well region, which is the location of the majority of electrical penetration assemblies. Because of the high temperatures, it was postulated in the ORNL study that the sealants would fail and all the electrical penetration assemblies would leak before structural failure would occur. Since other containments had similar electrical penetration assemblies, it was concluded that all containments would experience the same type of failure. The results of this study, however, show that this conclusion does not hold for PWRs because in the worst accident sequence, the long time containment gases stabilize to 350/sup 0/F. BWRs, on the other hand, do experience high dry-well temperatures and have a higher potential for leakage.

Sebrell, W.

1983-07-01T23:59:59.000Z

2

Ultrasonic Phased Array Assessment of the Interference Fit and Leak Path of the North Anna Unit 2 Control Rod Drive Mechanism Nozzle 63 with Destructive Validation  

SciTech Connect

The objective of this investigation was to evaluate the efficacy of ultrasonic testing (UT) for primary water leak path assessments of reactor pressure vessel (RPV) upper head penetrations. Operating reactors have experienced leakage when stress corrosion cracking of nickel-based alloy penetrations allowed primary water into the annulus of the interference fit between the penetration and the low-alloy steel RPV head. In this investigation, UT leak path data were acquired for an Alloy 600 control rod drive mechanism nozzle penetration, referred to as Nozzle 63, which was removed from the North Anna Unit 2 reactor when the RPV head was replaced in 2002. In-service inspection prior to the head replacement indicated that Nozzle 63 had a probable leakage path through the interference fit region. Nozzle 63 was examined using a phased-array UT probe with a 5.0-MHz, eight-element annular array. Immersion data were acquired from the nozzle inner diameter surface. The UT data were interpreted by comparing to responses measured on a mockup penetration with known features. Following acquisition of the UT data, Nozzle 63 was destructively examined to determine if the features identified in the UT examination, including leakage paths and crystalline boric acid deposits, could be visually confirmed. Additional measurements of boric acid deposit thickness and low-alloy steel wastage were made to assess how these factors affect the UT response. The implications of these findings for interpreting UT leak path data are described.

Crawford, Susan L.; Cinson, Anthony D.; MacFarlan, Paul J.; Hanson, Brady D.; Mathews, Royce

2012-08-01T23:59:59.000Z

3

Leak Pruning  

E-Print Network (OSTI)

Managed languages improve programmer productivity with type safety and garbage collection, which eliminate memory errors such as dangling pointers, double frees, and buffer overflows. However, programs may still leak memory if programmers forget to eliminate the last reference to an object that will not be used again. Leaks slow programs by increasing collector workload and frequency. Growing leaks crash programs. Instead of crashing, leak pruning extends program availability by predicting and reclaiming leaked objects at run time. Whereas garbage collection over-approximates live objects using reachability, leak pruning predicts dead objects and reclaims them based on how stale they are and the size of stale data structures. Leak pruning preserves semantics because it waits for heap exhaustion before reclaiming objects and then poisons references to objects it reclaims. If the program later tries to access these objects, the virtual machine (VM) throws an internal error. We implement leak pruning in a Java VM, show its overhead is low, and evaluate it on 10 leaking programs. Leak pruning does not help two programs, executes four substantial programs 1.6-35X longer, and executes four programs, including two leaks in Eclipse, for at least 24 hours. In the worst case, leak pruning defers fatal errors. In the best case, programs with unbounded memory requirements execute indefinitely and correctly in bounded memory with consistent throughput.

Michael D. Bond; Kathryn S. McKinley

2009-01-01T23:59:59.000Z

4

Tolerating memory leaks  

Science Conference Proceedings (OSTI)

Type safety and garbage collection in managed languages eliminate memory errors such as dangling pointers, double frees, and leaks of unreachable objects. Unfortunately, a program still leaks memory if it maintains references to objects it will never ... Keywords: bug tolerance, managed languages, memory leaks

Michael D. Bond; Kathryn S. McKinley

2008-10-01T23:59:59.000Z

5

HRT LEAK DETECTION SYSTEM  

SciTech Connect

All HRT process piping and equipment is contained in a large tank and flanged connections with stainless steel ring gaskets are used where needed to permit the removal of values and items of equipment. Underwater remote maintenance is to be employed and special provisions are required for indicating and locating leaks at all mechanical joints in the process system. Each joint is monitored and a signal is given when a leak occurs. The valve operator stems are sealed with stainless steel bellows and a means of detecting a leak in the bellows has been included. (auth)

Kuster, J.E.

1956-04-20T23:59:59.000Z

6

Fixing file descriptor leaks  

E-Print Network (OSTI)

We design, implement and test a tool for eliminating file descriptor (FD) leaks in programs at run-time. Our tool monitors FD allocation and use. When the allocation of a new FD would fail because a process's entire pool ...

Dumitran, Octavian-Daniel

2007-01-01T23:59:59.000Z

7

SEALING SIMULATED LEAKS  

Science Conference Proceedings (OSTI)

This report details the testing equipment, procedures and results performed under Task 7.2 Sealing Simulated Leaks. In terms of our ability to seal leaks identified in the technical topical report, Analysis of Current Field Data, we were 100% successful. In regards to maintaining seal integrity after pigging operations we achieved varying degrees of success. Internal Corrosion defects proved to be the most resistant to the effects of pigging while External Corrosion proved to be the least resistant. Overall, with limitations, pressure activated sealant technology would be a viable option under the right circumstances.

Michael A. Romano

2004-09-01T23:59:59.000Z

8

Sensitive hydrogen leak detector  

DOE Patents (OSTI)

A sensitive hydrogen leak detector system using passivation of a stainless steel vacuum chamber for low hydrogen outgassing, a high compression ratio vacuum system, a getter operating at 77.5 K and a residual gas analyzer as a quantitative hydrogen sensor.

Myneni, Ganapati Rao (Yorktown, VA)

1999-01-01T23:59:59.000Z

9

Path 15  

NLE Websites -- All DOE Office Websites (Extended Search)

Operations > Transmission Planning > Path 15 Path 15 Pictures and Videos Jan 04 Feb 04 Mar 04 Apr 04 May 04 Jun 04 Jul 04 Aug 04 Mar 06 Path 15 is an 84-mile stretch of electrical...

10

Reducing Leaking Electricity  

NLE Websites -- All DOE Office Websites (Extended Search)

4 4 Reducing Leaking Electricity Figure 1. Full and standby power draws of some compact audio systems. A surprisingly large number of appliances-from computer peripherals to cable TV boxes to radios-consume electricity even after they have been switched off. Other appliances, such as cordless telephones, remote garage door openers, and battery chargers don't get switched off but draw power even when they are not performing their principal functions. The energy used while the appliance is switched off or not performing its primary purpose is called "standby consumption" or "leaking electricity." This consumption allows TVs, VCRs and garage-door openers to be ready for instant-on with a remote control, microwave ovens to display a digital

11

Natural gas leak mapper  

DOE Patents (OSTI)

A system is described that is suitable for use in determining the location of leaks of gases having a background concentration. The system is a point-wise backscatter absorption gas measurement system that measures absorption and distance to each point of an image. The absorption measurement provides an indication of the total amount of a gas of interest, and the distance provides an estimate of the background concentration of gas. The distance is measured from the time-of-flight of laser pulse that is generated along with the absorption measurement light. The measurements are formated into an image of the presence of gas in excess of the background. Alternatively, an image of the scene is superimosed on the image of the gas to aid in locating leaks. By further modeling excess gas as a plume having a known concentration profile, the present system provides an estimate of the maximum concentration of the gas of interest.

Reichardt, Thomas A. (Livermore, CA); Luong, Amy Khai (Dublin, CA); Kulp, Thomas J. (Livermore, CA); Devdas, Sanjay (Albany, CA)

2008-05-20T23:59:59.000Z

12

Passive air cooling of liquid metal-cooled reactor with double vessel leak accommodation capability  

DOE Patents (OSTI)

A passive and inherent shutdown heat removal method with a backup air flow path which allows decay heat removal following a postulated double vessel leak event in a liquid metal-cooled nuclear reactor is disclosed. The improved reactor design incorporates the following features: (1) isolation capability of the reactor cavity environment in the event that simultaneous leaks develop in both the reactor and containment vessels; (2) a reactor silo liner tank which insulates the concrete silo from the leaked sodium, thereby preserving the silo`s structural integrity; and (3) a second, independent air cooling flow path via tubes submerged in the leaked sodium which will maintain shutdown heat removal after the normal flow path has been isolated. 5 figures.

Hunsbedt, A.; Boardman, C.E.

1995-04-11T23:59:59.000Z

13

Passive air cooling of liquid metal-cooled reactor with double vessel leak accommodation capability  

SciTech Connect

A passive and inherent shutdown heat removal method with a backup air flow path which allows decay heat removal following a postulated double vessel leak event in a liquid metal-cooled nuclear reactor. The improved reactor design incorporates the following features: (1) isolation capability of the reactor cavity environment in the event that simultaneous leaks develop in both the reactor and containment vessels; (2) a reactor silo liner tank which insulates the concrete silo from the leaked sodium, thereby preserving the silo's structural integrity; and (3) a second, independent air cooling flow path via tubes submerged in the leaked sodium which will maintain shutdown heat removal after the normal flow path has been isolated.

Hunsbedt, Anstein (Los Gatos, CA); Boardman, Charles E. (Saratoga, CA)

1995-01-01T23:59:59.000Z

14

High Altitude Aerial Natural Gas Leak Detection System  

SciTech Connect

The objective of this program was to develop and demonstrate a cost-effective and power-efficient advanced standoff sensing technology able to detect and quantify, from a high-altitude (> 10,000 ft) aircraft, natural gas leaking from a high-pressure pipeline. The advanced technology is based on an enhanced version of the Remote Methane Leak Detector (RMLD) platform developed previously by Physical Sciences Inc. (PSI). The RMLD combines a telecommunications-style diode laser, fiber-optic components, and low-cost DSP electronics with the well-understood principles of Wavelength Modulation Spectroscopy (WMS), to indicate the presence of natural gas located between the operator and a topographic target. The transceiver transmits a laser beam onto a topographic target and receives some of the laser light reflected by the target. The controller processes the received light signal to deduce the amount of methane in the laser's path. For use in the airborne platform, we modified three aspects of the RMLD, by: (1) inserting an Erbium-doped optical fiber laser amplifier to increase the transmitted laser power from 10 mW to 5W; (2) increasing the optical receiver diameter from 10 cm to 25 cm; and (3) altering the laser wavelength from 1653 nm to 1618 nm. The modified RMLD system provides a path-integrated methane concentration sensitivity {approx}5000 ppm-m, sufficient to detect the presence of a leak from a high capacity transmission line while discriminating against attenuation by ambient methane. In ground-based simulations of the aerial leak detection scenario, we demonstrated the ability to measure methane leaks within the laser beam path when it illuminates a topographic target 2000 m away. We also demonstrated simulated leak detection from ranges of 200 m using the 25 cm optical receiver without the fiber amplifier.

Richard T. Wainner; Mickey B. Frish; B. David Green; Matthew C. Laderer; Mark G. Allen; Joseph R. Morency

2006-12-31T23:59:59.000Z

15

MASS SPECTROMETER LEAK  

DOE Patents (OSTI)

An improved valve is described for precisely regulating the flow of a sample fluid to be analyzed, such as in a mass spectrometer, where a gas sample is allowed to "leak" into an evacuated region at a very low, controlled rate. The flow regulating valve controls minute flow of gases by allowing the gas to diffuse between two mating surfaces. The structure of the valve is such as to prevent the corrosive feed gas from contacting the bellows which is employed in the operation of the valve, thus preventing deterioration of the bellows.

Shields, W.R.

1960-10-18T23:59:59.000Z

16

Leak test fitting  

DOE Patents (OSTI)

A hollow fitting for use in gas spectrometry leak testing of conduit joints is divided into two generally symmetrical halves along the axis of the conduit. A clip may quickly and easily fasten and unfasten the halves around the conduit joint under test. Each end of the fitting is sealable with a yieldable material, such as a piece of foam rubber. An orifice is provided in a wall of the fitting for the insertion or detection of helium during testing. One half of the fitting also may be employed to test joints mounted against a surface.

Pickett, Patrick T. (Kettering, OH)

1981-01-01T23:59:59.000Z

17

Leak test adapter for containers  

DOE Patents (OSTI)

An adapter is provided for facilitating the charging of containers and leak testing penetration areas. The adapter comprises an adapter body and stem which are secured to the container`s penetration areas. The container is then pressurized with a tracer gas. Manipulating the adapter stem installs a penetration plug allowing the adapter to be removed and the penetration to be leak tested with a mass spectrometer. Additionally, a method is provided for using the adapter. The present invention relates generally to leak test adapters, and more particularly to leak test adapters used with containers such as radioactive material shipping containers.

Hallett, B.H.; Hartley, M.S.

1995-12-31T23:59:59.000Z

18

Leaking Pipelines: Doctoral Student Family Formation  

E-Print Network (OSTI)

Sari M. “Why the Academic Pipeline Leaks: Fewer Men thanone reason the academic pipeline leaks. 31 Blair-Loy, Mary.to leak out of the “academic pipeline. ” The term “academic

Serrano, Christyna M.

2008-01-01T23:59:59.000Z

19

Risk Impact Assessment of Extended Integrated Leak Rate Testing Intervals  

Science Conference Proceedings (OSTI)

This report presents a risk impact assessment for extending integrated leak rate test (ILRT) surveillance intervals to 15 years. The assessment demonstrates that on an industry-wide basis there is small risk associated with the extension, provided that the performance bases and defense-in-depth are maintained. There is an obvious benefit in not performing costly, critical-path, time-consuming tests that provide a limited benefit from a risk perspective.

2008-10-31T23:59:59.000Z

20

Tips: Sealing Air Leaks | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Sealing Air Leaks Sealing Air Leaks Tips: Sealing Air Leaks May 16, 2013 - 5:03pm Addthis Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Air leaks can waste a lot of your energy dollars. One of the quickest energy-- and money-saving tasks you can do is caulk, seal, and weather strip all seams, cracks, and openings to the outside. Tips for Sealing Air Leaks Test your home for air tightness. On a windy day, carefully hold a lit incense stick or a smoke pen next to your windows, doors, electrical

Note: This page contains sample records for the topic "lpf leak path" 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

Tips: Sealing Air Leaks | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Tips: Sealing Air Leaks Tips: Sealing Air Leaks Tips: Sealing Air Leaks May 16, 2013 - 5:03pm Addthis Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Sources of Air Leaks in Your Home. Areas that leak air into and out of your home cost you a lot of money. The areas listed in the illustration are the most common sources of air leaks. Air leaks can waste a lot of your energy dollars. One of the quickest energy-- and money-saving tasks you can do is caulk, seal, and weather strip all seams, cracks, and openings to the outside. Tips for Sealing Air Leaks Test your home for air tightness. On a windy day, carefully hold a lit incense stick or a smoke pen next to your windows, doors, electrical

22

Mitigated Transfer Line Leaks that Result in Surface Pools and Spray Leaks into Pits  

Science Conference Proceedings (OSTI)

This analysis provides radiological and toxicological consequence calculations for postulated mitigated leaks during transfers of six waste compositions. Leaks in Cleanout Boxes equipped with supplemental covers and leaks in pits are analyzed.

HEY, B.E.

1999-12-07T23:59:59.000Z

23

Stochastic Consequence Analysis for Waste Leaks  

SciTech Connect

This analysis evaluates the radiological consequences of potential Hanford Tank Farm waste transfer leaks. These include ex-tank leaks into structures, underneath the soil, and exposed to the atmosphere. It also includes potential misroutes, tank overflow

HEY, B.E.

2000-05-31T23:59:59.000Z

24

Common Errors in Leak Testing  

Science Conference Proceedings (OSTI)

Table 5   Leak tightness requirements for various products...1 � 10 -4 Small Pipeline (gas) 1 � 10 -5 Tanker (liquified natural gas) 1 � 10 -6 Fine Storage tank (NH 3 ) 1 � 10 -8 Heart pacemaker (gas) 1 � 10 -11...

25

Leaking electricity in domestic appliances  

Science Conference Proceedings (OSTI)

Many types of home electronic equipment draw electric power when switched off or not performing their principal functions. Standby power use (or ''leaking electricity'') for most appliances ranges from 1 - 20 watts. Even though standby use of each device is small, the combined standby power use of all appliances in a home can easily exceed 50 watts. Leaking electricity is already responsible for 5 to 10 percent of residential electricity use in the United States and over 10 percent in Japan. An increasing number of white goods also have standby power requirements. There is a growing international effort to limit standby power to around one watt per device. New and existing technologies are available to meet this target at little or no extra cost.

Meier, Alan; Rosen, Karen

1999-05-01T23:59:59.000Z

26

MWTF jumper connector integral seal block development and leak testing  

SciTech Connect

In fiscal year 1993, tests of an o-ring/tetraseal retainer designed to replace a gasket-type seal used in PUREX-type process jumper connectors encouraged the design of an improved seal block. This new seal block combines several parts into one unitized component called an integral seal block. This report summarizes development and leak testing of the new integral seal block. The integral seal block uses a standard o-ring nested in a groove to accomplish leak tightness. This seal block eliminates the need to machine acme threads into the lower skirt casting and seal retainers, eliminates tolerance stack-up, reduces parts inventory, and eliminates an unnecessary leak path in the jumper connector assembly. This report also includes test data on various types of o-ring materials subjected to heat and pressure. Materials tested included Viton, Kalrez, and fluorosilicone, with some incidental data on teflon coated silicone o-rings. Test experience clearly demonstrates the need to test each seal material for temperature and pressure in its intended application. Some materials advertised as being {open_quotes}better{close_quotes} at higher temperatures did not perform up to expectations. Inspection of the fluorosilicone and Kalrez seals after thermal testing indicates that they are much more susceptible to heat softening than Viton.

Ruff, E.S.; Jordan, S.R.

1995-01-01T23:59:59.000Z

27

Long-life leak standard assembly  

DOE Patents (OSTI)

The present invention is directed to a portable leak standard assembly which is capable of providing a stream of high-purity reference gas at a virtually constant flow rate over an extensive period of time. The leak assembly comprises a high pressure reservoir coupled to a metal leak valve through a valve-controlled conduit. A reproducible leak valve useful in this assembly is provided by a metal tube crimped with a selected pressure loading for forming an orifice in the tube with this orifice being of a sufficient size to provide the selected flow rate. The leak valve assembly is formed of metal so that it can be "baked-out" in a vacuum furnace to rid the reservoir and attendent components of volatile impurities which reduce the efficiency of the leak standard.

Basford, James A. (Oak Ridge, TN); Mathis, John E. (Oak Ridge, TN); Wright, Harlan C. (Oak Ridge, TN)

1982-01-01T23:59:59.000Z

28

High sensitivity leak detection method and apparatus  

DOE Patents (OSTI)

An improved leak detection method is provided that utilizes the cyclic adsorption and desorption of accumulated helium on a non-porous metallic surface. The method provides reliable leak detection at superfluid helium temperatures. The zero drift that is associated with residual gas analyzers in common leak detectors is virtually eliminated by utilizing a time integration technique. The sensitivity of the apparatus of this disclosure is capable of detecting leaks as small as 1 [times] 10[sup [minus]18] atm cc sec[sup [minus]1]. 2 figs.

Myneni, G.R.

1994-09-06T23:59:59.000Z

29

High sensitivity leak detection method and apparatus  

DOE Patents (OSTI)

An improved leak detection method is provided that utilizes the cyclic adsorption and desorption of accumulated helium on a non-porous metallic surface. The method provides reliable leak detection at superfluid helium temperatures. The zero drift that is associated with residual gas analyzers in common leak detectors is virtually eliminated by utilizing a time integration technique. The sensitivity of the apparatus of this disclosure is capable of detecting leaks as small as 1.times.10.sup.-18 atm cc sec.sup.-1.

Myneni, Ganapatic R. (Grafton, VA)

1994-01-01T23:59:59.000Z

30

Leak checker data logging system  

DOE Patents (OSTI)

A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time.

Payne, J.J.; Gannon, J.C.

1994-12-31T23:59:59.000Z

31

Leak checker data logging system  

DOE Patents (OSTI)

A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time.

Gannon, Jeffrey C. (Arlington, TX); Payne, John J. (Waterman, IL)

1996-01-01T23:59:59.000Z

32

Leak checker data logging system  

DOE Patents (OSTI)

A portable, high speed, computer-based data logging system for field testing systems or components located some distance apart employs a plurality of spaced mass spectrometers and is particularly adapted for monitoring the vacuum integrity of a long string of a superconducting magnets such as used in high energy particle accelerators. The system provides precise tracking of a gas such as helium through the magnet string when the helium is released into the vacuum by monitoring the spaced mass spectrometers allowing for control, display and storage of various parameters involved with leak detection and localization. A system user can observe the flow of helium through the magnet string on a real-time basis hour the exact moment of opening of the helium input valve. Graph reading can be normalized to compensate for magnet sections that deplete vacuum faster than other sections between testing to permit repetitive testing of vacuum integrity in reduced time. 18 figs.

Gannon, J.C.; Payne, J.J.

1996-09-03T23:59:59.000Z

33

One watt initiative: A global effort to reduce leaking electricity  

E-Print Network (OSTI)

National Laboratory - Leaking Electricity Web Site http://Effort to Reduce Leaking Electricity Alan MEIER* & Benoîtfraction of total electricity use. Several initiatives to

Meier, Alan K.; LeBot, Benoit

1999-01-01T23:59:59.000Z

34

Hazard Analysis for In Tank Spray Leaks  

SciTech Connect

The River Protection Project (RPP) Authorization Basis (AB) contains controls that address spray leaks in tanks. However, there are no hazardous conditions in the Hazards Database that specifically identify in-tank spray leak scenarios. The purpose of this Hazards Evaluation is to develop hazardous conditions related to in-tank spray leaks for the Hazards Database and to provide more complete coverage of Tank Farm facilities. Currently, the in-tank spray leak is part of the ''Spray Leak in Structures or From Waste Transfer Lines'' accidents in Section 3.4.2.9 of the Final Safety Analysis Report (FSAR) (CHG, 2000a). The accident analysis for the ''Spray Leak in Structure or From Waste Transfer Lines'' states the following regarding the location of a possible spray leak: Inside ventilated waste storage tanks (DSTs, DCRTs, and some SSTs). Aerosols could be generated inside a storage tank during a transfer because of a leak from the portion of the transfer pipe inside the tank. The tank ventilation system could help disperse the aerosols to the atmosphere should the vent system HEPA filters fail. This Hazards Evaluation also evaluates the controls currently assigned to the spray leak in structure accident and determines the applicability of the controls to the new hazardous conditions. This comparison reviews both the analysis in the FSAR and the controls found in the Technical Safety Requirements (TSRs) (CHG, 2000h). If the new hazardous conditions do not match the analyzed accident conditions and controls, then additional analysis may be required. This document is not intended to authorize the activity or determine the adequacy of controls; it is only intended to provide information about the hazardous conditions associated with this activity. The Control decision process as defined in the AB will be used to determine the adequacy of controls and whether the proposed activity is within the AB. This hazard evaluation does not constitute an accident analysis.

GRAMS, W.H.

2000-06-13T23:59:59.000Z

35

DIY BASICS CHECKLIST DRIPS AND LEAKS  

E-Print Network (OSTI)

DIY BASICS CHECKLIST DRIPS AND LEAKS Watercancauseseriousdamage- oftenunseen. Drillbits. Tapemeasure. Spiritlevel. Start off small. Collect a basic tool kit. There's plenty of DIY info'tdrillintomortarbetweenbricks. #12;DIY BASICS CHECKLIST Location Twopeoplemakethisamuch easierjob. Cutasheetofpapertothesize

Peters, Richard

36

Cork: dynamic memory leak detection for garbage-collected languages  

Science Conference Proceedings (OSTI)

A memory leak in a garbage-collected program occurs when the program inadvertently maintains references to objects that it no longer needs. Memory leaks cause systematic heap growth, degrading performance and resulting in program crashes after ... Keywords: dynamic, garbage collection, memory leak detection, memory leaks, runtime analysis

Maria Jump; Kathryn S. McKinley

2007-01-01T23:59:59.000Z

37

New findings on leak resistance of API 8-Round connectors  

Science Conference Proceedings (OSTI)

In response to high interest concerning leak resistance in API 8-Round connectors, the API funded projects that have identified and assessed parameters affecting leak. Among these parameters are make-up, diameter, grade, and combined loads. Additional turns during make-up was found to increase leak resistance. Investigations concerning diameter and grade identified larger diameter and higher grade connectors as most susceptible to low leak pressures when compared to pipe body ratings. Finally, combined loads were found to be crucial to leak. Tension lowers the leak resistance of 8-Round connectors in a manner that renders hydrotesting insufficient for defining leak in some service conditions.

Schwind, B.E.; Wooley, G.R.

1986-01-01T23:59:59.000Z

38

SINGLE-SHELL TANKS LEAK INTEGRITY ELEMENTS/SX FARM LEAK CAUSES AND LOCATIONS - 12127  

SciTech Connect

Washington River Protection Solutions, LLC (WRPS) developed an enhanced single-shell tank (SST) integrity project in 2009. An expert panel on SST integrity was created to provide recommendations supporting the development of the project. One primary recommendation was to expand the leak assessment reports (substitute report or LD-1) to include leak causes and locations. The recommendation has been included in the M-045-9IF Hanford Federal Facility Agreement and Consent Order (Tri-Party Agreement) as one of four targets relating to SST leak integrity. The 241-SX Farm (SX Farm) tanks with leak losses were addressed on an individual tank basis as part of LD-1. Currently, 8 out of 23 SSTs that have been reported to having a liner leak are located in SX Farm. This percentage was the highest compared to other tank farms which is why SX Farm was analyzed first. The SX Farm is comprised of fifteen SSTs built 1953-1954. The tanks are arranged in rows of three tanks each, forming a cascade. Each of the SX Farm tanks has a nominal I-million-gal storage capacity. Of the fifteen tanks in SX Farm, an assessment reported leak losses for the following tanks: 241-SX-107, 241-SX-108, 241-SX-109, 241-SX-111, 241-SX-112, 241-SX-113, 241-SX-114 and 241-SX-115. The method used to identify leak location consisted of reviewing in-tank and ex-tank leak detection information. This provided the basic data identifying where and when the first leaks were detected. In-tank leak detection consisted of liquid level measurement that can be augmented with photographs which can provide an indication of the vertical leak location on the sidewall. Ex-tank leak detection for the leaking tanks consisted of soil radiation data from laterals and drywells near the tank. The in-tank and ex-tank leak detection can provide an indication of the possible leak location radially around and under the tank. Potential leak causes were determined using in-tank and ex-tank information that is not directly related to leak detection. In-tank parameters can include temperature of the supernatant and sludge, types of waste, and chemical determination by either transfer or sample analysis. Ex-tank information can be assembled from many sources including design media, construction conditions, technical specifications, and other sources. Five conditions may have contributed to SX Farm tank liner failure including: tank design, thermal shock, chemistry-corrosion, liner behavior (bulging), and construction temperature. Tank design did not apparently change from tank to tank for the SX Farm tanks; however, there could be many unknown variables present in the quality of materials and quality of construction. Several significant SX Farm tank design changes occurred from previous successful tank farm designs. Tank construction occurred in winter under cold conditions which could have affected the ductile to brittle transition temperature of the tanks. The SX Farm tanks received high temperature boiling waste from REDOX which challenged the tank design with rapid heat up and high temperatures. All eight of the leaking SX Farm tanks had relatively high rate of temperature rise. Supernatant removal with subsequent nitrate leaching was conducted in all but three of the eight leaking tanks prior to leaks being detected. It is possible that no one characteristic of the SX Farm tanks could in isolation from the others have resulted in failure. However, the application of so many stressors - heat up rate, high temperature, loss of corrosion protection, and tank design - working jointly or serially resulted in their failure. Thermal shock coupled with the tank design, construction conditions, and nitrate leaching seem to be the overriding factors that can lead to tank liner failure. The distinction between leaking and sound SX Farm tanks seems to center on the waste types, thermal conditions, and nitrate leaching.

VENETZ TJ; WASHENFELDER D; JOHNSON J; GIRARDOT C

2012-01-25T23:59:59.000Z

39

Detecting Air Leaks | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Detecting Air Leaks Detecting Air Leaks Detecting Air Leaks September 27, 2012 - 6:39pm Addthis For a thorough and accurate measurement of air leakage in your home, hire a qualified technician to conduct an energy assessment, particularly a blower door test. For a thorough and accurate measurement of air leakage in your home, hire a qualified technician to conduct an energy assessment, particularly a blower door test. You may already know where some air leakage occurs in your home, such as an under-the-door draft, but you'll need to find the less obvious gaps to properly air seal your home. For a thorough and accurate measurement of air leakage in your home, hire a qualified technician to conduct an energy assessment, particularly a blower door test. A blower door test, which depressurizes a home, can

40

Savings Project: How to Seal Air Leaks with Caulk | Department...  

NLE Websites -- All DOE Office Websites (Extended Search)

How to Seal Air Leaks with Caulk Addthis Project Level Easy Energy Savings 5 - 10% Time to Complete 1 - 2 Hours Overall Cost 3 - 30 Sealing air leaks around windows and...

Note: This page contains sample records for the topic "lpf leak path" 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

B Plant ion exchange feed line leak  

SciTech Connect

>One of the objectives of the Waste Management Program is to separate the long-lived heat emitter /aup 137/Cs from the bulk of the high-level Iiquid wastes. This separation is accomplished by the ion exchange process in the 221-B Building. Interim storage of the cesium is in solution as a nitrate. The feed for the B Plant cesinm ion exchange process is pumped from the lag storage tank, 105-C, through a pipeline and several diversion boxes to the 221-B Building. On December 19, 1969, a leak was discovered near the 241-C-152 diversion box in the section of this line, V-122, from the 105-C tank. Although the leak represented a loss of feed for the processing of /sup 137/Cs, more important was the consequence of environmental contmination to the soil from the line leak. For this reason, an investigation was made to estblish the extent of the radioactivity spread. The results of a well drilling operation undertaken to define the boundary and to estimate the extent of the leak are summarized. (CR)

Tanaka, K.H.

1971-01-25T23:59:59.000Z

42

Novel NIST Connector Uses Magnets for Leak-Free ...  

Science Conference Proceedings (OSTI)

Novel NIST Connector Uses Magnets for Leak-Free Microfluidic Devices. For Immediate Release: November 17, 2009. ...

2012-10-15T23:59:59.000Z

43

Modeling leaks from liquid hydrogen storage systems.  

DOE Green Energy (OSTI)

This report documents a series of models for describing intended and unintended discharges from liquid hydrogen storage systems. Typically these systems store hydrogen in the saturated state at approximately five to ten atmospheres. Some of models discussed here are equilibrium-based models that make use of the NIST thermodynamic models to specify the states of multiphase hydrogen and air-hydrogen mixtures. Two types of discharges are considered: slow leaks where hydrogen enters the ambient at atmospheric pressure and fast leaks where the hydrogen flow is usually choked and expands into the ambient through an underexpanded jet. In order to avoid the complexities of supersonic flow, a single Mach disk model is proposed for fast leaks that are choked. The velocity and state of hydrogen downstream of the Mach disk leads to a more tractable subsonic boundary condition. However, the hydrogen temperature exiting all leaks (fast or slow, from saturated liquid or saturated vapor) is approximately 20.4 K. At these temperatures, any entrained air would likely condense or even freeze leading to an air-hydrogen mixture that cannot be characterized by the REFPROP subroutines. For this reason a plug flow entrainment model is proposed to treat a short zone of initial entrainment and heating. The model predicts the quantity of entrained air required to bring the air-hydrogen mixture to a temperature of approximately 65 K at one atmosphere. At this temperature the mixture can be treated as a mixture of ideal gases and is much more amenable to modeling with Gaussian entrainment models and CFD codes. A Gaussian entrainment model is formulated to predict the trajectory and properties of a cold hydrogen jet leaking into ambient air. The model shows that similarity between two jets depends on the densimetric Froude number, density ratio and initial hydrogen concentration.

Winters, William Stanley, Jr.

2009-01-01T23:59:59.000Z

44

Probabilistic pipe fracture evaluations for leak-rate-detection applications  

SciTech Connect

Regulatory Guide 1.45, {open_quotes}Reactor Coolant Pressure Boundary Leakage Detection Systems,{close_quotes} was published by the U.S. Nuclear Regulatory Commission (NRC) in May 1973, and provides guidance on leak detection methods and system requirements for Light Water Reactors. Additionally, leak detection limits are specified in plant Technical Specifications and are different for Boiling Water Reactors (BWRs) and Pressurized Water Reactors (PWRs). These leak detection limits are also used in leak-before-break evaluations performed in accordance with Draft Standard Review Plan, Section 3.6.3, {open_quotes}Leak Before Break Evaluation Procedures{close_quotes} where a margin of 10 on the leak detection limit is used in determining the crack size considered in subsequent fracture analyses. This study was requested by the NRC to: (1) evaluate the conditional failure probability for BWR and PWR piping for pipes that were leaking at the allowable leak detection limit, and (2) evaluate the margin of 10 to determine if it was unnecessarily large. A probabilistic approach was undertaken to conduct fracture evaluations of circumferentially cracked pipes for leak-rate-detection applications. Sixteen nuclear piping systems in BWR and PWR plants were analyzed to evaluate conditional failure probability and effects of crack-morphology variability on the current margins used in leak rate detection for leak-before-break.

Rahman, S.; Ghadiali, N.; Paul, D.; Wilkowski, G. [Battelle, Columbus, OH (United States)

1995-04-01T23:59:59.000Z

45

Best Management Practice: Distribution System Audits, Leak Detection, and  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Best Management Practice: Distribution System Audits, Leak Best Management Practice: Distribution System Audits, Leak Detection, and Repair Best Management Practice: Distribution System Audits, Leak Detection, and Repair October 7, 2013 - 3:06pm Addthis A distribution system audit, leak detection, and repair programs help Federal facilities reduce water losses and make better use of limited water resources. Overview Federal facilities with large campus settings and expansive distribution systems can lose a significant amount of total water production and purchases to system leaks. Leaks in distribution systems are caused by a number of factors, including pipe corrosion, high system pressure, construction disturbances, frost damage, damaged joints, and ground shifting and settling. Regular distribution system leak detection surveys

46

Slowing leaking electricity to a trickle  

SciTech Connect

Electronics play an increasingly pervasive role in home appliances and office equipment. This is generally a good thing because the electronics help provide new features and amenities. Electronic controls can also reduce energy use by providing the services only when consumers actually need them. On the other hand, these electronic features often continue to consume energy even while switched off or not performing their principal service. The technical term for this phenomenon is ''standby power consumption'' but it has acquired several common names, including ''leaking electricity,'' ''waiting electricity,'' ''free-running power,'' ''off-mode power,'' and ''phantom loads.'' The leaking electricity found in our televisions, VCRs, garage door openers, cordless phones and many other appliances has a surprisingly large impact on the global environment.

Meier, Alan

1998-07-01T23:59:59.000Z

47

Method for mapping a natural gas leak  

DOE Patents (OSTI)

A system is described that is suitable for use in determining the location of leaks of gases having a background concentration. The system is a point-wise backscatter absorption gas measurement system that measures absorption and distance to each point of an image. The absorption measurement provides an indication of the total amount of a gas of interest, and the distance provides an estimate of the background concentration of gas. The distance is measured from the time-of-flight of laser pulse that is generated along with the absorption measurement light. The measurements are formatted into an image of the presence of gas in excess of the background. Alternatively, an image of the scene is superimposed on the image of the gas to aid in locating leaks. By further modeling excess gas as a plume having a known concentration profile, the present system provides an estimate of the maximum concentration of the gas of interest.

Reichardt, Thomas A. (Livermore, CA); Luong, Amy Khai (Dublin, CA); Kulp, Thomas J. (Livermore, CA); Devdas, Sanjay (Albany, CA)

2009-02-03T23:59:59.000Z

48

Distribution System Audits, Leak Detection, and Repair: Kirtland Air Force Base Leak Detection and Repair Program  

NLE Websites -- All DOE Office Websites (Extended Search)

Best Management Practice Best Management Practice Case Study #3 Distribution System Audits, Leak Detection, and Repair Kirtland Air Force Base - Leak Detection and Repair Program Overview Kirtland Air Force Base (AFB) performed an award winning leak detection and repair program in 2006. The results of the project are saving Kirtland AFB 179 million gallons each year, which is over 16% of the total water use at the base. Kirtland AFB is located on 52,000 acres, southeast and adjacent to Albuquerque, New Mexico. The area is a high altitude desert, only receiving about 8 inches of rain each year. Kirtland AFB draws water from an under- ground aquifer via seven production wells through- out the base. The base also has access to water from the City of Albuquerque. The underground water

49

Distribution System Audits, Leak Detection, and Repair: Kirtland Air Force Base Leak Detection and Repair Program  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Best Management Practice Best Management Practice Case Study #3 Distribution System Audits, Leak Detection, and Repair Kirtland Air Force Base - Leak Detection and Repair Program Overview Kirtland Air Force Base (AFB) performed an award winning leak detection and repair program in 2006. The results of the project are saving Kirtland AFB 179 million gallons each year, which is over 16% of the total water use at the base. Kirtland AFB is located on 52,000 acres, southeast and adjacent to Albuquerque, New Mexico. The area is a high altitude desert, only receiving about 8 inches of rain each year. Kirtland AFB draws water from an under- ground aquifer via seven production wells through- out the base. The base also has access to water from the City of Albuquerque. The underground water

50

Urban Song Paths: place resounding  

Science Conference Proceedings (OSTI)

The project Urban Song Paths took a traditional musical form, the Kaluli song path from Papua, New Guinea, and translated it for a contemporary urban situation. The Two Rivers Project explored a classic song path subject, the route of a ...

Viv Corringham

2006-04-01T23:59:59.000Z

51

Location of Leaks in Pressure Testable Direct Burial Steam Distribution Conduits  

E-Print Network (OSTI)

Central steam is commonly distributed through direct burial lines protected by an outer conduit. These underground conduit systems are subject to electrolytic corrosion. Failure of the outer casing permits water intrusion and damage to insulation, resulting in increased thermal energy losses and eventual damage to the steam line. Breaches in the outer conduit are difficult to locate, and damage to the steam line may progress until the entire line requires replacement. Thermal energy losses are high if groundwater infiltrates the conduit and excavation to replace the steam line is extremely expensive. Locating leaks in steam line conduit is a two step procedure. The first step is to regularly pressure test sections of conduit to determine whether a breach has occurred. Pressure testing should be performed on a regular basis to minimize thermal losses and damage from groundwater intrusion. If pressure testing reveals that the conduit is leaking, the Navy has developed a procedure and equipment to determine where the breach occurred. The breach can be detected using sulfur hexafluoride (SF6) tracer gas injected into the conduit. After injection, maintenance personnel walk the path of the steam line with an SF6 detector that precisely locates the leak. Then, only the necessary conduit sections are excavated for repair. We have successfully used this system at several locations, and in a variety of soil conditions. Tracer gas leak testing provides an effective and inexpensive method to evaluate underground conduit systems. Performed on a regular basis, it is a useful preventive maintenance tool to minimize energy loss and utility system damage. Test results also provide valuable input to the decision to repair or replace underground steam lines. This equipment and procedure may be used on other utility system distribution components, such as compressed air and direct burial steam lines.

Sittel, M. G.; Messock, R. K.

1993-03-01T23:59:59.000Z

52

Long-life leak standard assembly. [Patent application  

DOE Patents (OSTI)

The present invention is directed to a portable leak standard assembly which is capable of providing a stream of high-purity reference gas at a virtually constant flow rate over an extensive period of time. The leak assembly comprises a high pressure reservoir coupled to a metal leak valve through a valve-controlled conduit. A reproducible leak valve useful in this assembly is provided by a metal tube crimped with a selected pressure loading for forming an orifice in the tube with this orifice being of a sufficient size to provide the selected flow rate. The leak valve assembly is formed of metal so that it can be baked-out in a vacuum furnace to rid the reservoir and attendent components of volatile impurities which reduce the efficiency of the leak standard.

Basford, J.A.; Mathis, J.E.; Wright, H.C.

1980-11-12T23:59:59.000Z

53

Mitigation of Nuclear Fuel Pool Leaks  

Science Conference Proceedings (OSTI)

The used or spent fuel from nuclear reactors is stored in spent fuel pools, which require canals for fuel transfer activities. These pools--35–40 feet or more in depth--are lined with stainless steel ranging in thickness from ~.19 in–~.38 in (~4.8 mm–~9.5 mm). The liners are anchored to the walls and slab via welds that can leak or crack. Électricité de France (EDF) has developed tools to check suspect areas of the liner seam welds for cracking or leakage. This report ...

2013-08-29T23:59:59.000Z

54

One-Piece Leak-Proof Battery  

SciTech Connect

The casing of a leak-proof one-piece battery is made of a material comprising a mixture of at least a matrix based on polypropylene and an alloy of a polyamide and a polypropylene. The ratio of the matrix to the alloy is in the range 0.5 to 6 by weight. The alloy forms elongate arborescent inclusions in the matrix such that, on average, the largest dimension of a segment of the arborescence is at least twenty times the smallest dimension of the segment.

Verhoog, Roelof (Bordeaux, FR)

1999-03-23T23:59:59.000Z

55

Low heat-leak cryogenic envelope  

DOE Patents (OSTI)

A plurality of cryogenic envelope sections are joined together to form a power transmission line. Each of the sections is comprised of inner and outer tubes having multilayer metalized plastic spirally wrapped within a vacuum chamber formed between the inner and outer tubes. A refrigeration tube traverses the vacuum chamber, but exits one section and enters another through thermal standoffs for reducing heat-leak from the outer tube to the refrigeration tube. The refrigeration tube passes through a spirally wrapped shield within each section's vacuum chamber in a manner so that the refrigeration tube is in close thermal contact with the shield, but is nevertheless slideable with respect thereto.

DeHaan, James R. (Boulder, CO)

1976-10-19T23:59:59.000Z

56

Savings Project: How to Seal Air Leaks with Caulk | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Electricity Rates Savings Project: How to Seal Air Leaks with Caulk Tips: Windows Household Heating Systems: Although several different types of fuels are available to heat...

57

Hydrogen leak detection - low cost distributed gas sensors  

NLE Websites -- All DOE Office Websites (Extended Search)

leak detection that can be economically satisfied using our technology. * Due to limited refinery capacity, downtime in the oil and gas refining industry has become of critical...

58

Distributed Optical Sensor for CO2 Leak Detection  

NLE Websites -- All DOE Office Websites (Extended Search)

on the technology "Distributed Optical Sensor for CO 2 Leak Detection," for which a Patent Application has been filed. This technology is available for licensing andor further...

59

Sampling diffusive transition paths  

SciTech Connect

We address the problem of sampling double-ended diffusive paths. The ensemble of paths is expressed using a symmetric version of the Onsager-Machlup formula, which only requires evaluation of the force field and which, upon direct time discretization, gives rise to a symmetric integrator that is accurate to second order. Efficiently sampling this ensemble requires avoiding the well-known stiffness problem associated with sampling infinitesimal Brownian increments of the path, as well as a different type of stiffness associated with sampling the coarse features of long paths. The fine-features sampling stiffness is eliminated with the use of the fast sampling algorithm (FSA), and the coarse-feature sampling stiffness is avoided by introducing the sliding and sampling (S&S) algorithm. A key feature of the S&S algorithm is that it enables massively parallel computers to sample diffusive trajectories that are long in time. We use the algorithm to sample the transition path ensemble for the structural interconversion of the 38-atom Lennard-Jones cluster at low temperature.

F. Miller III, Thomas; Predescu, Cristian

2006-10-12T23:59:59.000Z

60

Commercial Grade Item (CGI) Dedication for Leak Detection Relays  

Science Conference Proceedings (OSTI)

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

KOCH, M.R.

1999-10-26T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Commercial Grade Item (CGI) Dedication for Leak Detection Relays  

Science Conference Proceedings (OSTI)

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping Instrumentation and Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

JOHNS, B.R.; KOCH, M.R.

2000-01-28T23:59:59.000Z

62

Commercial Grade Item (CGI) Dedication for Leak Detection Relays  

SciTech Connect

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

KOCH, M.R.; JOHNS, B.R.

1999-12-21T23:59:59.000Z

63

Commercial Grade Item (CGI) Dedication for Leak Detection Relays  

Science Conference Proceedings (OSTI)

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping Instrumentation and Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

KOCH, M.R.

2000-02-28T23:59:59.000Z

64

Commercial Grade Item (CGI) Dedication for Leak Detection Relays  

SciTech Connect

This Test Plan provides a test method to dedicate the leak detection relays used on the new Pumping and Instrumentation Control (PIC) skids. The new skids are fabricated on-site. The leak detection system is a safety class system per the Authorization Basis.

KOCH, M.R.

1999-08-11T23:59:59.000Z

65

Gas Leak from Vinyl Taped Stainless Steel Dressing Jars  

DOE Green Energy (OSTI)

The leak rates of nitrogen gas from stainless steel dressing jars taped with 2 inch vinyl tape were measured. These results were used to calculate hydrogen leak rates from the same jars. The calculations show that the maximum concentration of hydrogen buildup in this type of container configuration will beat least 3 orders of magnitude below the lower explosion limit for hydrogen in air.

Tim Hayes

1999-03-01T23:59:59.000Z

66

Mineral formation during simulated leaks of Hanford waste tanks  

E-Print Network (OSTI)

Mineral formation during simulated leaks of Hanford waste tanks Youjun Deng a , James B. Harsh a at the US DOE Hanford Site, Washington, caus- ing mineral dissolution and re-precipitation upon contact mimicking tank leak conditions at the US DOE Hanford Site. In batch experiments, Si-rich solutions

Flury, Markus

67

A new blowdown compensation scheme for boiler leak detection  

E-Print Network (OSTI)

A new blowdown compensation scheme for boiler leak detection A. M. Pertew ,1 X. Sun ,1 R. Kent considers the blowdown effect in industrial boiler operation. This adds to the efficiency of recent advances in identification-based leak detection techniques of boiler steam- water systems. Keywords: Industrial Boilers, Tube

Marquez, Horacio J.

68

Heat exchanger with leak detecting double wall tubes  

DOE Patents (OSTI)

A straight shell and tube heat exchanger utilizing double wall tubes and three tubesheets to ensure separation of the primary and secondary fluid and reliable leak detection of a leak in either the primary or the secondary fluids to further ensure that there is no mixing of the two fluids.

Bieberbach, George (Tampa, FL); Bongaards, Donald J. (Seminole, FL); Lohmeier, Alfred (Tampa, FL); Duke, James M. (St. Petersburg, all of, FL)

1981-01-01T23:59:59.000Z

69

Detecting leaks to reduce energy costs  

SciTech Connect

This article describes how analyzing boilerhouse data in its manufacturing plants and applying algorithmic techniques is helping an automobile manufacturer run its utility operations more efficiently. Ford Motor Co., based in Dearborn, Michigan, is realizing significant energy savings, reducing capital expenditures, and minimizing wastewater disposal costs by diagnosing and quantifying leaks in its compressed air, steam/condensate, and process water systems by applying algorithms developed by Cleveland-based CEC Consultants Inc. These algorithms make use of readily available--and often already installed--instruments, such as vortex shedding meters, chart recorders, and data loggers, to compare how much utility use is needed for assembly and manufacturing equipment with how much is being generated.

Valenti, M.

1995-07-01T23:59:59.000Z

70

Finding many optimal paths without growing any optimal path trees  

Science Conference Proceedings (OSTI)

Many algorithms seek to compute actual optimal paths in weighted directed graphs. The standard approach for reporting an actual optimal path is based on building a single-source optimal path tree. A technique was given in [1] for a class of problems ...

Danny Z. Chen; Ewa Misiolek

2007-07-01T23:59:59.000Z

71

MOSES Leak Tool 1.0 - Mineral Oil Spill Evaluation System Leak Tool, Version 1.0  

Science Conference Proceedings (OSTI)

The purpose of the Mineral Oil Spill Evaluation System (MOSES) Leak Tool Version 1.0 is to provide a Monte-Carlo estimate of the initial horizontal spill radius from leaks in either at-grade or pole-mounted transformers. The internal transformer pressure is specified as either being atmospheric or at pressurized conditions. This tool is intended to supplement the MOSES-MP code (EPRI, 2002). The MOSES-MP code estimates the extent of oil migration from leaks and spills from electrical oil-filled equipment ...

2007-08-20T23:59:59.000Z

72

Statistical approaches to leak detection for geological sequestration  

E-Print Network (OSTI)

Geological sequestration has been proposed as a way to remove CO? from the atmosphere by injecting it into deep saline aquifers. Detecting leaks to the atmosphere will be important for ensuring safety and effectiveness of ...

Haidari, Arman S

2011-01-01T23:59:59.000Z

73

Using Cyclic Memory Allocation to Eliminate Memory Leaks  

E-Print Network (OSTI)

We present and evaluate a new memory management technique for eliminating memory leaks in programs with dynamic memory allocation. This technique observes the execution of the program on a sequence of training inputs to ...

Nguyen, Huu Hai

74

Using Cyclic Memory Allocation to Eliminate Memory Leaks  

E-Print Network (OSTI)

We present and evaluate a new memory management technique foreliminating memory leaks in programs with dynamic memoryallocation. This technique observes the execution of the program on asequence of training inputsto find ...

Nguyen, Huu Hai

2005-10-26T23:59:59.000Z

75

Leak test fixture and method for using same  

DOE Patents (OSTI)

A method and apparatus are provided which are especially useful for leak testing seams such as an end closure or joint in an article. The test does not require an enclosed pressurized volume within the article or joint section to be leak checked. A flexible impervious membrane is disposed over an area of the seamed surfaces to be leak checked and sealed around the outer edges. A preselected vacuum is applied through an opening in the membrane to evacuate the area between the membrane and the surface being leak checked to essentially collapse the membrane to conform to the article surface or joined adjacent surfaces. A pressure differential is concentrated at the seam bounded by the membrane and only the seam experiences a pressure differential as air or helium molecules are drawn into the vacuum system through a leak in the seam. A helium detector may be placed in a vacuum exhaust line from the membrane to detect the helium. Alternatively, the vacuum system may be isolated at a preselected pressure and leaks may be detected by a subsequent pressure increase in the vacuum system.

Hawk, Lawrence S. (Knoxville, TN)

1976-01-01T23:59:59.000Z

76

Note: Counting humps in Motzkin paths  

Science Conference Proceedings (OSTI)

In this paper we study the number of humps (peaks) in Dyck, Motzkin and Schroder paths. Recently A. Regev noticed that the number of peaks in all Dyck paths of order n is one half of the number of super-Dyck paths of order n. He also computed the number ... Keywords: Dyck paths, Humps, Motzkin paths, Narayana number, Peaks, Schröder paths

Yun Ding; Rosena R. X. Du

2012-01-01T23:59:59.000Z

77

A New Path Forward  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4, Fourth Quarter, 2011 4, Fourth Quarter, 2011 www.fossil.energy.gov/news/energytoday.html HigHligHts inside 2 A New Path Forward A Column from the Office of Fossil Energy's Chief Operating Officer 4 A Legacy of Benefit A Look at How the Office of Fossil Energy Has Returned National Benefit 5 Increasing Production and Storage New Study Explains How CO2 Injection in Oilfield Can Increase Production 6 A Medical Improvement NETL Helps Develop Improved Coronary Stents for Heart Patients 9 International Efforts CSLF Ministerial Reinforces Support for CCUS Construction activities began at an Illinois ethanol plant that will demon- strate carbon capture and storage. The project, sponsored by the Office of Fossil Energy, is the first large-scale

78

Classicalization via Path Integral  

E-Print Network (OSTI)

Recently, it was suggested that a large class of non-renormalizable theories may need no UV completion. By analogy with gravity where classical black holes are expected to be created in high-energy scatterings, it is conjectured that similar classical solutions, so-called classicalons, should occur. In this way the theory protects itself against non-unitarity, for instead of probing small distances at high energies one enters a classical regime. An effective theory of Goldstone bosons provides and example in which the size of classicalons grows with energy, and the high energy scattering is cut-off by small momenta, inversely proportional to the classicalon size. In this note we offer an alternative, path integral discussion of this important result.

Borut Bajc; Arshad Momen; Goran Senjanovi?

2011-02-17T23:59:59.000Z

79

Classicalization via Path Integral  

E-Print Network (OSTI)

Recently, it was suggested that a large class of non-renormalizable theories may need no UV completion. By analogy with gravity where classical black holes are expected to be created in high-energy scatterings, it is conjectured that similar classical solutions, so-called classicalons, should occur. In this way the theory protects itself against non-unitarity, for instead of probing small distances at high energies one enters a classical regime. An effective theory of Goldstone bosons provides and example in which the size of classicalons grows with energy, and the high energy scattering is cut-off by small momenta, inversely proportional to the classicalon size. In this note we offer an alternative, path integral discussion of this important result.

Bajc, Borut; Senjanovi?, Goran

2011-01-01T23:59:59.000Z

80

Thermodynamic Metrics and Optimal Paths  

E-Print Network (OSTI)

Thermodynamic metrics and optimal paths David A. Sivak ? andmanifold on the space of thermodynamic states. Within theconnection to the existing thermodynamic length formalism,

Sivak, David

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Collabortive Authoring of Walden's Paths  

Science Conference Proceedings (OSTI)

Collaborative Authoring of Walden's Paths. Theory and Practice of Digital Libraries. Lecture Notes in Computer Sciences 2012.Lecture Notes in Computer Sciences 2012

Yuanling, Dr. Li [Texas A& M University; Bogen, Paul Logasa [ORNL; Pogue, Daniel [Halliburton Energy Services; Furuta, Dr. Richard Keith [Texas A& M University; ShipmanIII, Dr. Frank Major [Texas A& M University

2012-01-01T23:59:59.000Z

82

AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION  

SciTech Connect

Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. This second six-month technical report summarizes the progress made towards defining, designing, and developing the hardware and software segments of the airborne, optical remote methane and ethane sensor. The most challenging task to date has been to identify a vendor capable of designing and developing a light source with the appropriate output wavelength and power. This report will document the work that has been done to identify design requirements, and potential vendors for the light source. Significant progress has also been made in characterizing the amount of light return available from a remote target at various distances from the light source. A great deal of time has been spent conducting laboratory and long-optical path target reflectance measurements. This is important since it helps to establish the overall optical output requirements for the sensor. It also reduces the relative uncertainty and risk associated with developing a custom light source. The data gathered from the optical path testing has been translated to the airborne transceiver design in such areas as: fiber coupling, optical detector selection, gas filters, and software analysis. Ophir will next, summarize the design progress of the transceiver hardware and software development. Finally, Ophir will discuss remaining project issues that may impact the success of the project.

Jerry Myers

2003-11-12T23:59:59.000Z

83

Prediction of Gas Leak Tightness of Superplastically Formed Products  

Science Conference Proceedings (OSTI)

In some applications, in this case an aluminium box in a subatomic particle detector containing highly sensitive detecting devices, it is important that a formed sheet should show no gas leak from one side to the other. In order to prevent a trial-and-error procedure to make this leak tight box, a method is set up to predict if a formed sheet conforms to the maximum leak constraint. The technique of superplastic forming (SPF) is used in order to attain very high plastic strains before failure. Since only a few of these boxes are needed, this makes, this generally slow, process an attractive production method. To predict the gas leak of a superplastically formed aluminium sheet in an accurate way, finite element simulations are used in combination with a user-defined material model. This constitutive model couples the leak rate with the void volume fraction. This void volume fraction is then dependent on both the equivalent plastic strain and the applied hydrostatic pressure during the bulge process (backpressure).

Snippe, Corijn H. C. [National Institute for Subatomic Physics (Nikhef) PO Box 41882, 1009 DB Amsterdam (Netherlands); Meinders, T. [University of Twente, Faculty of Engineering Technology PO Box 217, 7500 AE Enschede (Netherlands)

2010-06-15T23:59:59.000Z

84

Contemporary data path design optimization  

E-Print Network (OSTI)

power consumption, instead of performance, becomes the most critical concern in many data-path designs, especially for mobile devicePower consumption becomes more critical issue than performance in modern data-path designs, especially for mobile devicepower consumption. Furthermore, we also implement the PST algorithm on both ASIC and FPGA devices

Liu, Jianhua

2006-01-01T23:59:59.000Z

85

GPU-accelerated path rendering  

Science Conference Proceedings (OSTI)

For thirty years, resolution-independent 2D standards (e.g. PostScript, SVG) have depended on CPU-based algorithms for the filling and stroking of paths. Advances in graphics hardware have largely ignored accelerating resolution-independent 2D graphics ... Keywords: OpenGL, path rendering, stencil buffer, vector graphics

Mark J. Kilgard; Jeff Bolz

2012-11-01T23:59:59.000Z

86

Path skyline for moving objects  

Science Conference Proceedings (OSTI)

Skyline query has been used mainly for relatively static and low dimensional data sets. We develop the Skyline query for the moving objects coping with dynamic changes efficiently. This study is focused on deriving a fundamental algorithm for extracting ... Keywords: moving objects, path skyline, shortest path

Wookey Lee; Chris Soo-Hyun Eom; Tae-Chang Jo

2012-04-01T23:59:59.000Z

87

Apparatus and method for detecting leaks in piping  

DOE Patents (OSTI)

A method and device are disclosed for detecting the location of leaks along a wall or piping system, preferably in double-walled piping. The apparatus comprises a sniffer probe, a rigid cord such as a length of tube attached to the probe on one end and extending out of the piping with the other end, a source of pressurized air and a source of helium. The method comprises guiding the sniffer probe into the inner pipe to its distal end, purging the inner pipe with pressurized air, filling the annulus defined between the inner and outer pipe with helium, and then detecting the presence of helium within the inner pipe with the probe as is pulled back through the inner pipe. The length of the tube at the point where a leak is detected determines the location of the leak in the pipe. 2 figures.

Trapp, D.J.

1994-12-27T23:59:59.000Z

88

Oil/gas collector/separator for underwater oil leaks  

DOE Patents (OSTI)

This invention is comprised of an oil/gas collector/separator for recovery of oil leaking, for example, from an offshore or underwater oil well. The separator is floated over the point of the leak and tethered in place so as to receive oil/gas floating, or forced under pressure, toward the water surface from either a broken or leaking oil well casing, line, or sunken ship. The separator is provided with a downwardly extending skirt to contain the oil/gas which floats or is forced upward into a dome wherein the gas is separated from the oil/water, with the gas being flared (burned) at the top of the dome, and the oil is separated from water and pumped to a point of use. Since the density of oil is less than that of water it can be easily separated from any water entering the dome.

Henning, C.D.

1992-12-31T23:59:59.000Z

89

Oil/gas collector/separator for underwater oil leaks  

DOE Patents (OSTI)

An oil/gas collector/separator for recovery of oil leaking, for example, from an offshore or underwater oil well. The separator is floated over the point of the leak and tethered in place so as to receive oil/gas floating, or forced under pressure, toward the water surface from either a broken or leaking oil well casing, line, or sunken ship. The separator is provided with a downwardly extending skirt to contain the oil/gas which floats or is forced upward into a dome wherein the gas is separated from the oil/water, with the gas being flared (burned) at the top of the dome, and the oil is separated from water and pumped to a point of use. Since the density of oil is less than that of water it can be easily separated from any water entering the dome.

Henning, Carl D. (Livermore, CA)

1993-01-01T23:59:59.000Z

90

Leak Detection and H2 Sensor Development  

DOE Green Energy (OSTI)

Low-cost, durable, and reliable Hydrogen safety sensor for vehicle, stationary, and infrastructure applications. A new zirconia, electrochemical-based sensor technology is being transitioned out of the laboratory and into an advanced testing phase for vehicular and stationary H{sub 2} safety applications. Mixed potential sensors are a class of electrochemical devices that develop an open-circuit electromotive force due to the difference in the kinetics of the redox reactions of various gaseous species at each electrode/electrolyte/gas interface, referred to as the triple phase boundary (TPB). Therefore, these sensors have been considered for the sensing of various reducible or oxidizable gas species in the presence of oxygen. Based on this principle, a unique sensor design was developed by LANL and LLNL. The uniqueness of this sensor derives from minimizing heterogeneous catalysis (detrimental to sensor response) by avoiding gas diffusion through a catalytically active material and minimizing diffusion path to the TPB. Unlike the conventional design of these devices that use a dense solid electrolyte and porous thin film electrodes (similar to the current state-of-the-art zirconia-based sensors and fuel cells), the design of this sensor uses dense electrodes and porous electrolytes. Such a sensor design facilitates a stable and reproducible device response, since dense electrode morphologies are easy to reproduce and are significantly more stable than the conventional porous morphologies. Moreover, these sensors develop higher mixed potentials since the gas diffusion is through the less catalytically active electrolyte than the electrode. Lastly, the choice of electrodes is primarily based on their O2 reduction kinetics and catalytic properties vis-a-vis the target gas of interest.

Brosha, Eric L. [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

91

How Do You Find Thermal Leaks in Your Home? | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

How Do You Find Thermal Leaks in Your Home? How Do You Find Thermal Leaks in Your Home? How Do You Find Thermal Leaks in Your Home? March 31, 2011 - 7:30am Addthis On Monday, John told you about the thermal leak detector he purchased to help him find and seal leaks in his home. A thermal leak detector can be a great tool to help you find leaks in your own home, but it's not your only option. In addition to tools like this, you can also use some of our tips on do-it-yourself energy assessments, or you could get a professional energy assessment. How do you find thermal leaks in your home? Each Thursday, you have the chance to share your thoughts on a question about energy efficiency or renewable energy for consumers. Please e-mail your responses to the Energy Saver team at consumer.webmaster@nrel.gov.

92

Analysis and design of an in-pipe system for water leak detection  

E-Print Network (OSTI)

Leaks are a major factor for unaccounted water losses in almost every water distribution network. Pipeline leak may result, for example, from bad workmanship or from any destructive cause, due to sudden changes of pressure, ...

Chatzigeorgiou, Dimitris M

2010-01-01T23:59:59.000Z

93

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (2 of 4) BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010 (1 of 4) Re-Building Greensburg The...

94

BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (3 of 4) BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (2 of 4) Re-Building Greensburg The...

95

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (3 of 4) BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010 (1 of 4) Re-Building Greensburg The...

96

CSNI specialist meeting on leak-before-break in nuclear reactor piping: proceedings  

SciTech Connect

On September 1 and 2, 1983, the CSNI subcommittee on primary system integrity held a special meeting in Monterey, California, on the subject of leak-before-break in nuclear reactor piping systems. The purpose of the meeting was to provide an international forum for the exchange of ideas, positions, and research results; to identify areas requiring additional research and development; and to determine the general attitude toward acceptance of the leak-before-break concept. The importance of the leak-before-break issue was evidenced by excellent attendance at the meeting and through active participation by the meeting attendees. Approximately 125 people representing fifteen different nations attended the meeting. The meeting was divided into four technical sessions addressing the following areas: Application of Piping Fracture Mechanics to Leak-Before Break, Leak Rate and Leak Detection, Leak-Before-Break Studies, Methods and Results, Current and Proposed Positions on Leak-Before-Break.

Not Available

1984-08-01T23:59:59.000Z

97

New concepts for refrigerant leak detection and mixture measurement  

Science Conference Proceedings (OSTI)

Since the discovery that chlorofluorocarbons (CFCs) destroy the ozone layer, the need to reduce the release of these refrigerants into the environment has become critical. A total ban of ozone-depleting CFCs is expected within a few years, and hydrofluorocarbons (HFCs) and fluorocarbons (FCs) and their mixtures are expected to be used during a transition period. Several HFC and FC refrigerants are currently being considered as CFC substitutes. The electronic refrigerant leak detectors currently being considered as CFC substitutes. The electronic refrigerant leak detectors currently on the market were developed to detect CFCs and are not as sensitive to HFCs. Although incremental improvement can be made to these devices to detect HFCs, they often lead to increased false signals. Also, there is no simple device available to measure the composition of a refrigerant mixture. The authors present two new concepts to aid in the development of two portable instruments that can be used for HFC leak detection and for quantitative measurement of refrigerant mixture compositions. The development of simple, easy-to-use portable leak detectors and refrigerant mixture meters is essential to the wide use of alternative refrigerants in industry.

Chen, F.C.; Allman, S.L.; Chen, C.H.

1993-12-31T23:59:59.000Z

98

Learning for informative path planning  

E-Print Network (OSTI)

Through the combined use of regression techniques, we will learn models of the uncertainty propagation efficiently and accurately to replace computationally intensive Monte- Carlo simulations in informative path planning. ...

Park, Sooho, S.M. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

99

Survivable paths in multilayer networks  

E-Print Network (OSTI)

We consider the problem of protection in multilayer networks. In single-layer net- works, a pair of disjoint paths can be used to provide protection for a source-destination pair. However, this approach cannot be directly ...

Parandehgheibi, Marzieh

2012-01-01T23:59:59.000Z

100

Physarum can compute shortest paths  

Science Conference Proceedings (OSTI)

Physarum Polycephalum is a slime mold that apparently is able to solve shortest path problems. A mathematical model has been proposed by biologists to describe the feedback mechanism used by the slime mold to adapt its tubular channels while foraging ...

Vincenzo Bonifaci; Kurt Mehlhorn; Girish Varma

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Methodology to quantify leaks in aerosol sampling system components  

E-Print Network (OSTI)

Filter holders and continuous air monitors (CAMs) are used extensively in the nuclear industry. It is important to minimize leakage in these devices and in recognition of this consideration, a limit on leakage for sampling systems is specified in ANSI/HPS N13.1-1999; however the protocol given in the standard is really germane to measurement of significant leakage, e.g., several percent of the sampling flow rate. In the present study, a technique for quantifying leakage was developed and that approach was used to measure the sealing integrity of a CAM and two kinds of filter holders. The methodology involves use of sulfur hexafluoride as a tracer gas with the device being tested operated under dynamic flow conditions. The leak rates in these devices were determined in the pressure range from 2.49 kPa (10 In. H2O) vacuum to 2.49 kPa (10 In. H2O) pressure at a typical flow rate of 56.6 L/min (2 cfm). For the two filter holders, the leak rates were less than 0.007% of the nominal flow rate. The leak rate in the CAM was less than 0.2% of the nominal flow rate. These values are well within the limit prescribed in the ANSI standard, which is 5% of the nominal flow rate. Therefore the limit listed in the ANSI standard should be reconsidered as lower values can be achieved, and the methodology presented herein can be used to quantify lower leakage values in sample collectors and analyzers. A theoretical analysis was also done to determine the nature of flow through the leaks and the amount of flow contribution by the different possible mechanisms of flow through leaks.

Vijayaraghavan, Vishnu Karthik

2003-08-01T23:59:59.000Z

102

The Path of Carbon in Photosynthesis VI.  

E-Print Network (OSTI)

PATH OF CkRBON IN PHOTOSYNTHESIS. VI. * Ni. Calvin Radiationdetermination of the path of carbon in photosynthesis. Theredark fixation of photosynthesis and methods of separation

Calvin, M.

1949-01-01T23:59:59.000Z

103

Microsoft Word - Final MELCOR Guidance Report Version May 3 2004.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

MELCOR Computer Code Application Guidance for Leak Path Factor in Documented Safety Analysis Final Report U.S. Department of Energy Office of Environment, Safety and Health U.S. Department of Energy 1000 Independence Ave., S.W. Washington, DC 20585-2040 May 2004 MELCOR LPF Guidance May 2004 Final Report ii INTENTIONALLY BLANK MELCOR LPF Guidance May 2004 Final Report iii Foreword This document provides guidance to Department of Energy (DOE) facility analysts in the use of the MELCOR computer code for supporting Documented Safety Analysis applications. Information is provided herein that supplements information found in the MELCOR documentation provided by the code developer. MELCOR is one of six computer codes designated by DOE's Office of Environmental, Safety and Health as a toolbox code for safety

104

Hanford Single-Shell Tank Leak Causes and Locations - 241-B Farm  

SciTech Connect

This document identifies 241-B Tank Farm (B Farm) leak cause and locations for the 100 series leaking tank (241-B-107) identified in RPP-RPT-49089, Hanford B-Farm Leak Inventory Assessments Report. This document satisfies the B Farm portion of the target (T04) in the Hanford Federal Facility Agreement and Consent Order milestone M-045-91F.

Girardot, Crystal L. [Washington River Protection Systems, Richland, WA (United States); Harlow, Donald G. [Washington River Protection Systems, Richland, WA (United States)

2013-07-11T23:59:59.000Z

105

Method and means of passive detection of leaks in buried pipes  

DOE Patents (OSTI)

A method and means for passive detection of a leak in a buried pipe containing fluid under pressure includes a plurality of acoustic detectors that are placed in contact with the pipe. Noise produced by the leak is detected by the detectors, and the detected signals are correlated to locate the leak. In one embodiment of the invention two detectors are placed at different locations to locate a leak between them. In an alternate embodiment two detectors of different waves are placed at substantially the same location to determine the distance of the leak from the location.

Claytor, T.

1979-10-30T23:59:59.000Z

106

Method and means of passive detection of leaks in buried pipes  

DOE Patents (OSTI)

A method and means for passive detection of a leak in a buried pipe containing fluid under pressure includes a plurality of acoustic detectors that are placed in contact with the pipe. Noise produced by the leak is detected by the detectors, and the detected signals are correlated to locate the leak. In one embodiment of the invention two detectors are placed at different locations to locate a leak between them. In an alternate embodiment two detectors of different waves are placed at substantially the same location to determine the distance of the leak from the location.

Claytor, Thomas N. (Woodridge, IL)

1981-01-01T23:59:59.000Z

107

Comments on the leak-before-break concept for nuclear power plant piping systems  

SciTech Connect

The leak-before-break concept is based on the idea that, with a high degree of probability, failure of the pressure boundary of piping systems will be signaled by a detectable leak that will provide ample time to shutdown and repair that leak. The status of the leak-before-break concept is discussed in this report, including a review of industrial and nuclear power plant experience with respect to leak-before-break, fracture mechanics, and potential elimination of postulated pipe breaks in nuclear power plant piping design. 36 refs., 12 figs., 3 tabs.

Rodabaugh, E.C.

1985-08-01T23:59:59.000Z

108

Analysis of the leak-detection system for top welds of EBR-II fuel elements  

SciTech Connect

An analysis of the leak detector used to check the top welds on EBR-II fuel elements was performed. Data were obtained to allow calculation of volumes of the metering chamber and test chamber at each station of the leak detector. These volumes and a mathematical model were used to calculate decrease in pressure with time for each station. Values for calibrated leaks and unknown leak rates were compared with calculated ones. The calculated results for the two calibrated leaks agreed with the observed pressure-time results for the two leaks. Results show that determining the volumes of each leak-detector station allows the leakrate sensitivity to be readily calculated for each station. One leak-detector station could not detect a minimum leak rate of 2 x 10/sup -4/ std cm/sup 3/ sec at 40 atm, which is the current specification. The other four stations could meet the specification. Suggestions are given for periodic calibration of the leak detectors as well as precautions that must be observed to achieve optimum sensitivity when operating the leak detector. (auth)

Hudman, G.D.; Walters, L.C.

1973-05-01T23:59:59.000Z

109

Calculation of SY tank annulus continuous air monitor readings after postulated leak scenarios  

Science Conference Proceedings (OSTI)

The objective of this work was to determine whether or not a continuous air monitor (CAM) monitoring the annulus of one of the SY Tanks would be expected to alarm after three postulated leak scenarios. Using data and references provided by Lockheed Martin`s Tank Farm personnel, estimated CAM readings were calculated at specific times after the postulated scenarios might have occurred. Potential CAM readings above background at different times were calculated for the following leak scenarios: Leak rate of 0.01 gal/min; Leak rate of 0.03 gal/min (best estimate of the maximum probable leak rate from a single-shell tank); and Leak of 73 gal (equivalent to a {1/4}-in. leak on the floor of the annulus). The equation used to make the calculations along with descriptions and/or explanations of the terms are included, as is a list of the assumptions and/or values used for the calculations.

Kenoyer, J.L.

1998-08-01T23:59:59.000Z

110

Distributed Optical Sensor for CO2 Leak Detection  

NLE Websites -- All DOE Office Websites (Extended Search)

Optical Sensor for CO Optical Sensor for CO 2 Leak Detection Opportunity Research is active on the technology "Distributed Optical Sensor for CO 2 Leak Detection," for which a Patent Application has been filed. This technology is available for licensing and/or further collaborative research from the U.S. Department of Energy's National Energy Technology Laboratory (NETL). Overview The availability of fossil fuels to provide clean, affordable energy is essential for domestic and global prosperity and security well into the 21st century. However, there are concerns over the impacts of greenhouse gases (GHGs) in the atmosphere-particularly carbon dioxide (CO 2 ). Carbon capture and storage in geologic formations is a promising technology to reduce the impact of CO

111

Leake County, Mississippi: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Leake County, Mississippi: Energy Resources Leake County, Mississippi: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 32.8073509°, -89.4742177° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":32.8073509,"lon":-89.4742177,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

112

Management of Leaks in Hydrogen Production, Delivery, and Storage Systems  

DOE Green Energy (OSTI)

A systematic approach to manage hydrogen leakage from components is presented. Methods to evaluate the quantity of hydrogen leakage and permeation from a system are provided by calculation and testing sensitivities. The following technology components of a leak management program are described: (1) Methods to evaluate hydrogen gas loss through leaks; (2) Methods to calculate opening areas of crack like defects; (3) Permeation of hydrogen through metallic piping; (4) Code requirements for acceptable flammability limits; (5) Methods to detect flammable gas; (6) Requirements for adequate ventilation in the vicinity of the hydrogen system; (7) Methods to calculate dilution air requirements for flammable gas mixtures; and (8) Concepts for reduced leakage component selection and permeation barriers.

Rawls, G

2006-04-27T23:59:59.000Z

113

MCO combustible gas management leak test acceptance criteria  

DOE Green Energy (OSTI)

Existing leak test acceptance criteria for mechanically sealed and weld sealed multi-canister overpacks (MCO) were evaluated to ensure that MCOs can be handled and stored in stagnant air without compromising the Spent Nuclear Fuel Project's overall strategy to prevent accumulation of combustible gas mixtures within MCO's or within their surroundings. The document concludes that the integrated leak test acceptance criteria for mechanically sealed and weld sealed MCOs (1 x 10{sup -5} std cc/sec and 1 x 10{sup -7} std cc/sec, respectively) are adequate to meet all current and foreseeable needs of the project, including capability to demonstrate compliance with the NFPA 60 Paragraph 3-3 requirement to maintain hydrogen concentrations [within the air atmosphere CSB tubes] t or below 1 vol% (i.e., at or below 25% of the LFL).

SHERRELL, D.L.

1999-05-11T23:59:59.000Z

114

Demonstration of KEMA SF6 Leak Detector at Consolidated Edison  

Science Conference Proceedings (OSTI)

Detecting leaks of sulfur hexafluoride (SF6) gas has become more important as environmental regulators forge ahead with programs aimed at curbing SF6 emissions and energy companies seek to cut costs. SF6 is widely used in the electric power industry as an insulator for high-voltage circuit breakers, switchgear, and other substation equipment. A new on-line applicable SF6 leakage detection technique (KEMA patented) using photo-acoustic detection of SF6 was researched during demonstrations at Consolidated ...

2006-09-18T23:59:59.000Z

115

Profiling all paths: A new profiling technique for both cyclic and acyclic paths  

Science Conference Proceedings (OSTI)

As an important technique in dynamic program analysis, path profiling collects the execution frequency of different paths, and has been widely used in a variety of areas. However, existing intra-procedural profiling techniques cannot effectively deal ... Keywords: Breakpoint, Cyclic paths, Dynamic analysis, Path backwalk, Path profiling, Probe instrumentation

Bixin Li; Lulu Wang; Hareton Leung; Fei Liu

2012-07-01T23:59:59.000Z

116

Low Cost Open-Path Instrument for Monitoring Atmospheric Carbon Dioxide at Sequestration Sites  

NLE Websites -- All DOE Office Websites (Extended Search)

Low Cost open-path Instrument for Low Cost open-path Instrument for monItorIng atmospherIC Carbon DIoxIDe at sequestratIon sItes Background Growing concern over the effect on global climate of the buildup of greenhouse gases (GHG), particularly carbon dioxide (CO 2 ), in the atmosphere may lead to the curtailment of CO 2 emissions. One potential course of action by industry to reduce GHG emissions is the subsurface disposal of CO 2 . An important requirement of such disposal is verification that the injected gases remain in place and do not leak to the surface. Perhaps the most direct evidence of a successful sequestration project is the lack of a detectable CO 2 concentration above the background level in the air near the ground. Although measurement of CO 2 concentration can be performed, it is

117

Purify: Fast Detection of Memory Leaks and Access Errors This paper describes Purify, a software testing and quality assurance tool that detects memory leaks and  

E-Print Network (OSTI)

], Catalytix [Feuer85] and various similar malloc_debug packages use. Byte and two-byte checking cannot spent eliminating leaks in the X11R4 server for Sun workstations. All that effort, yet dozens of leaks as gcc. The data was collected on a Sun SPARCstation SLC running SUNOS 4.1.1, and all times are real

Qin, Feng

118

Bottom-Fill Method for Stopping Leaking Oil Wells  

E-Print Network (OSTI)

Hardware failure at the top of a deep underwater oil well can result in a catastrophic oil leak. The enormous pressure lifting the column of oil in that well makes it nearly impossible to stop from the top with seals or pressurization. We propose to fill the bottom of the well with dense and possibly streamlined objects that can descend through the rising oil. As they accumulate, those objects couple to the oil via viscous and drag forces and increase the oil's effective density. When its effective density exceeds that of the earth's crust, the oil will have essentially stopped flowing.

Bloomfield, Louis A

2010-01-01T23:59:59.000Z

119

Hanford Single-Shell Tank Leak Causes and Locations - 241-A Farm  

Science Conference Proceedings (OSTI)

This document identifies 241-A Tank Farm (A Farm) leak causes and locations for the 100 series leaking tanks (241-A-104 and 241-A-105) identified in RPP-ENV-37956, Hanford A and AX Farm Leak Assessment Report. This document satisfies the A Farm portion of the target (T04) in the Hanford Federal Facility Agreement and Consent Order milestone M-045-91F.

Girardot, Crystal L.; Harlow, Donald G.

2013-09-10T23:59:59.000Z

120

Hanford Single-Shell Tank Leak Causes and Locations - 241-C Farm  

SciTech Connect

This document identifies 241-C Tank Farm (C Farm) leak causes and locations for the 100 series leaking tanks (241-C-101 and 241-C-105) identified in RPP-RPT-33418, Rev. 2, Hanford C-Farm Leak Inventory Assessments Report. This document satisfies the C Farm portion of the target (T04) in the Hanford Federal Facility Agreement and Consent Order milestone M-045-91F.

Girardot, Crystal L.; Harlow, Donald G.

2013-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Hanford Single-Shell Tank Leak Causes and Locations - 241-U Farm  

SciTech Connect

This document identifies 241-U Tank Farm (U Farm) leak causes and locations for the 100 series leaking tanks (241-U-104, 241-U-110, and 241-U-112) identified in RPP-RPT-50097, Rev. 0, Hanford 241-U Farm Leak Inventory Assessment Report. This document satisfies the U-Farm portion of the target (T04) in the Hanford Federal Facility Agreement and Consent Order milestone M-045-91F.

Girardot, Crystal L.; Harlow, Donald G.

2013-12-02T23:59:59.000Z

122

Accelerating cleanup: Paths to closure  

SciTech Connect

This document was previously referred to as the Draft 2006 Plan. As part of the DOE`s national strategy, the Richland Operations Office`s Paths to Closure summarizes an integrated path forward for environmental cleanup at the Hanford Site. The Hanford Site underwent a concerted effort between 1994 and 1996 to accelerate the cleanup of the Site. These efforts are reflected in the current Site Baseline. This document describes the current Site Baseline and suggests strategies for further improvements in scope, schedule and cost. The Environmental Management program decided to change the name of the draft strategy and the document describing it in response to a series of stakeholder concerns, including the practicality of achieving widespread cleanup by 2006. Also, EM was concerned that calling the document a plan could be misconstrued to be a proposal by DOE or a decision-making document. The change in name, however, does not diminish the 2006 vision. To that end, Paths to Closure retains a focus on 2006, which serves as a point in time around which objectives and goals are established.

Edwards, C.

1998-06-30T23:59:59.000Z

123

China Energy and Emissions Path to 2030  

NLE Websites -- All DOE Office Websites (Extended Search)

China Energy and Emissions Path to 2030 Title China Energy and Emissions Path to 2030 Publication Type Report LBNL Report Number LBNL-4866E Year of Publication 2013 Authors...

124

THE PATH OF CARBON IN PHOTOSYNTHESIS  

E-Print Network (OSTI)

The Path of Carbon in Photosynthesis, Prentice-Hall, Ino. ,to StUdy the Products of Photosynthesis as Depending on the48 THE PATH OF CARBON IN PHOTOSYNTHESIS J. A. Bassham and

Bassham, J.A.; Calvin, Melvin

2008-01-01T23:59:59.000Z

125

THE PATH OF CARBON IN PHOTOSYNTHESIS  

E-Print Network (OSTI)

The Path ot Carbon in Photosynthesis. Science" l2J. , 476 (48 THE PATH OF CARBON IN PHOTOSYNTHESIS Melvin Calvin Nobel8-A Fig. 1. Elementary photosynthesis scheme. DES IOU OF THE

Calvin, Melvin Nobel Prize lecture

2008-01-01T23:59:59.000Z

126

Intelligent Coatings for Location And Detection of Leaks (IntelliCLAD...  

NLE Websites -- All DOE Office Websites (Extended Search)

alerting people of the impending danger of a gas leak. Ever since the tragic natural gas explosion of 1937 in a New London, Texas school building, various governments...

127

Hanford Single-Shell Tank Leak Causes and Locations - 241-BY and 241-TY Farm  

SciTech Connect

This document identifies 241-BY Tank Farm (BY Farm) and 241-TY Tank Farm (TY Farm) leak causes and locations for the 100 series leaking tanks (241-BY-103, 241-TY-103, 241-TY-104, 241-TY-105, and 241-TY-106) identified in RPP-RPT-43704, Hanford BY Farm Leak Assessments Report, and in RPP-RPT-42296, Hanford TY Farm Leak Assessments Report. This document satisfies the BY and TY Farm portion of the target (T04) in Hanford Federal Facility Agreement and Consent Order milestone M-045-91F.

Girardot, Crystal L.; Harlow, Donald G.

2013-11-19T23:59:59.000Z

128

Ultra high vacuum pumping system and high sensitivity helium leak detector  

DOE Patents (OSTI)

An improved helium leak detection method and apparatus are disclosed which increase the leak detection sensitivity to 10{sup {minus}13} atm cc/s. The leak detection sensitivity is improved over conventional leak detectors by completely eliminating the use of o-rings, equipping the system with oil-free pumping systems, and by introducing measured flows of nitrogen at the entrances of both the turbo pump and backing pump to keep the system free of helium background. The addition of dry nitrogen flows to the system reduces back streaming of atmospheric helium through the pumping system as a result of the limited compression ratios of the pumps for helium. 2 figs.

Myneni, G.R.

1997-12-30T23:59:59.000Z

129

Ultra high vacuum pumping system and high sensitivity helium leak detector  

DOE Patents (OSTI)

An improved helium leak detection method and apparatus are disclosed which increase the leak detection sensitivity to 10.sup.-13 atm cc s.sup.-1. The leak detection sensitivity is improved over conventional leak detectors by completely eliminating the use of o-rings, equipping the system with oil-free pumping systems, and by introducing measured flows of nitrogen at the entrances of both the turbo pump and backing pump to keep the system free of helium background. The addition of dry nitrogen flows to the system reduces backstreaming of atmospheric helium through the pumping system as a result of the limited compression ratios of the pumps for helium.

Myneni, Ganapati Rao (Yorktown, VA)

1997-01-01T23:59:59.000Z

130

Method of locating a leaking fuel element in a fast breeder power reactor  

DOE Patents (OSTI)

Leaking fuel elements in a fast reactor are identified by measuring the ratio of .sup.134 Xe to .sup.133 Xe in the reactor cover gas following detection of a fuel element leak, this ratio being indicative of the power and burnup of the failed fuel element. This procedure can be used to identify leaking fuel elements in a power breeder reactor while continuing operation of the reactor since the ratio measured is that of the gases stored in the plenum of the failed fuel element. Thus, use of a cleanup system for the cover gas makes it possible to identify sequentially a multiplicity of leaking fuel elements without shutting the reactor down.

Honekamp, John R. (Downers Grove, IL); Fryer, Richard M. (Idaho Falls, ID)

1978-01-01T23:59:59.000Z

131

Field Guide: Turbine Steam Path Damage  

Science Conference Proceedings (OSTI)

Steam path damage, particularly of blades, has long been recognized as a leading cause of steam turbine unavailability for large fossil fuel plants. Damage to steam path components by various mechanisms continues to result in significant economic impact domestically and internationally. Electric Power Research Institute (EPRI) Report TR-108943, Turbine Steam Path Damage: Theory and Practice, Volumes 1 and 2, was prepared to compile the most recent knowledge about turbine steam path damage: identifying th...

2011-12-12T23:59:59.000Z

132

Stochastic path tracing on consumer graphics cards  

Science Conference Proceedings (OSTI)

We present a path tracer using the GPU of a consumers graphics card to render images. It is implemented in Java and GLSL using GroIMP as modelling platform and runtime environment. The path tracer is capable of rendering primitives like sphere, cone, ... Keywords: GPU, HDR, global illumination, path tracing, procedural texturing, raytracing, texture mapping

Thomas Huwe; Reinhard Hemmerling

2008-04-01T23:59:59.000Z

133

You won`t find these leaks with a blower door: The latest in {open_quotes}leaking electricity{close_quotes} in homes  

SciTech Connect

Leaking electricity is the energy consumed by appliances when they are switched off or not performing their principal functions. Field measurements in Florida, California, and Japan show that leaking electricity represents 50 to 100 Watts in typical homes, corresponding to about 5 GW of total electricity demand in the United States. There are three strategies to reduce leaking electricity: eliminate leakage entirely, eliminate constant leakage and replace with intermittent charge plus storage, and improve efficiency of conversion. These options are constrained by the low value of energy savings-less than $5 per saved Watt. Some technical and lifestyle solutions are proposed. 13 refs., 1 fig., 2 tabs.

Rainer, L. [Davis Energy Group, CA (United States); Greenberg, S.; Meier, A. [Lawrence Berkeley National Lab., CA (United States)

1996-08-01T23:59:59.000Z

134

Estimation of Gas Leak Rates Through Very Small Orifices  

Office of Scientific and Technical Information (OSTI)

Estimation of Gas Leak Rates Estimation of Gas Leak Rates Through Very Small Orifices and Channels by Herbert J. Bomelburg February 1977 Prepared for the Nuclear Regulatory Commission -..- Pacific Northwest Laboratories Th% report was preparrd is an accceullt r.84 work spoi.wr~d by the Un~ted States Governmect. Kettker t > ~ United States nor the L'nited states 'rl:clczr 1tcgl;l;:cry Cornmiszion. :or ally c! their e m p i o y e ~ , nor any of chcrr contractors, subcontraao~r, a . tlveir rrn~invct?t-, r.~aies any H r r l a tty, cxpreji o r implied, or ?.;+~nics any !egA liability or rcrpocsibility for iirc accuracy. zcm:lc.~cn~ss 01 ~rscf.~!ccss -,f an). i?fzrxat-on, 3Poar.i:b4. prodiict cr I.m)cess disclosed, or repreen:.; :hi.: i;s i43? wott:rl n.;\ irlfringe pr ivzrc:i*l u w x o :ig.~ts.

135

AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION  

Science Conference Proceedings (OSTI)

Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. This six-month technical report summarizes the progress for each of the proposed tasks, discusses project concerns, and outlines near-term goals. Ophir has completed a data survey of two major natural gas pipeline companies on the design requirements for an airborne, optical remote sensor. The results of this survey are disclosed in this report. A substantial amount of time was spent on modeling the expected optical signal at the receiver at different absorption wavelengths, and determining the impact of noise sources such as solar background, signal shot noise, and electronic noise on methane and ethane gas detection. Based upon the signal to noise modeling and industry input, Ophir finalized the design requirements for the airborne sensor, and released the critical sensor light source design requirements to qualified vendors. Responses from the vendors indicated that the light source was not commercially available, and will require a research and development effort to produce. Three vendors have responded positively with proposed design solutions. Ophir has decided to conduct short path optical laboratory experiments to verify the existence of methane and absorption at the specified wavelength, prior to proceeding with the light source selection. Techniques to eliminate common mode noise were also evaluated during the laboratory tests. Finally, Ophir has included a summary of the potential concerns for project success and has established future goals.

Jerry Myers

2003-05-13T23:59:59.000Z

136

Model falsification diagnosis and sensor placement for leak detection in pressurized pipe networks  

Science Conference Proceedings (OSTI)

Pressurized pipe networks used for fresh-water distribution can take advantage of recent advances in sensing technologies and data-interpretation to evaluate their performance. In this paper, a leak-detection and a sensor placement methodology are proposed ... Keywords: Data interpretation, Leak detection, Sensor placement, System identification, Water distribution

James-A. Goulet, Sylvain Coutu, Ian F. C. Smith

2013-04-01T23:59:59.000Z

137

Early Tube Leak Detection in a HRSG Application Using Acoustic Monitoring Technology  

Science Conference Proceedings (OSTI)

Acoustic monitoring has become an essential part of early tube leak detection for conventional boilers. Acoustic monitoring is intended for steam leak detection in pressurized vessels, including power boilers, recovery boilers, and feedwater heaters. The system performs acoustic monitoring by continuously measuring the internal sounds from the boiler, signaling an alarm when the sound exceeds a preset threshold for a ...

2012-12-12T23:59:59.000Z

138

An Evaluation of Time Dependent Leak Rates in Degraded Steam Generator Tubing  

Science Conference Proceedings (OSTI)

Argonne National Laboratory (ANL) has performed leak rate testing of degraded steam generator tubing for a number of years as part of the Steam Generator Tube Integrity Program, under the sponsorship of the Office of Nuclear Regulatory Research of the U.S. Nuclear Regulatory Commission. This document describes the results of a review and evaluation of ANL time-dependent leak rate information.

2007-12-13T23:59:59.000Z

139

Methods for Integrated Leak Detection Inference at CO2 Sequestration Sites  

NLE Websites -- All DOE Office Websites (Extended Search)

Methods for Integrated Leak Detection Inference at CO2 Sequestration Sites Methods for Integrated Leak Detection Inference at CO2 Sequestration Sites Speaker(s): Mitchell Small Date: March 23, 2010 - 12:00pm Location: 90-3122 This seminar will explain a methodology for combining site characterization and soil CO2 monitoring for detecting leaks at geologic CO2 sequestration sites. Near surface CO2 fluxes resulting from a leak are simulated using the TOUGH2 model for different values of soil permeability, leakage rate and vadose zone thickness. Natural background soil CO2 flux rates are characterized by a Bayesian hierarchical model that predicts the background flux as a function of soil temperature. A presumptive leak is assumed if the monitored flux rate exceeds a critical value corresponding to a very high (e.g., 99%) prediction interval for the natural flux conditioned on

140

NETL: News Release - Field Testing Underway of Remote Sensor Gas Leak  

NLE Websites -- All DOE Office Websites (Extended Search)

September 16, 2004 September 16, 2004 Field Testing Underway of Remote Sensor Gas Leak Detection Systems CASPER, WY-An extensive field test that will document and demonstrate how effective technologies are in remotely detecting natural gas leaks is being held September 13-17, as the Department of Energy simulates natural gas leaks along a predetermined course at DOE's Rocky Mountain Oilfield Testing Center (RMOTC). Low-flying aircraft, satellites and special ground vehicles carrying advanced leak detection sensors will participate as representatives of the gas industry and potential technology manufacturers observe the technologies in a real-world environment and evaluate their readiness for commercialization. The test plan was devised with strong input from an industry advisory board and test participants to compare the effectiveness of several gas-leak detection devices from ground, air and satellite based platforms.

Note: This page contains sample records for the topic "lpf leak path" 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

Evaluation and refinement of leak-rate estimation models. Revision 1  

Science Conference Proceedings (OSTI)

Leak-rate estimation models are important elements in developing a leak-beforebreak methodology in piping integrity and safety analyses. Existing thermalhydraulic and crack-opening-area models used in current leak-rate estimations have been incorporated into a single computer code for leak-rate estimation. The code is called SQUIRT, which stands for Seepage Quantification of Upsets In Reactor Tubes. The SQUIRT program has been validated by comparing its thermalhydraulic predictions with the limited experimental data that have been published on two-phase flow through slits and cracks, and by comparing its crack-opening-area predictions with data from the Degraded Piping Program. In addition, leak-rate experiments were conducted to obtain validation data for a circumferential fatigue crack in a carbon steel pipe girth weld.

Paul, D.D.; Ahmad, J.; Scott, P.M.; Flanigan, L.F.; Wilkowski, G.M. [Battelle, Columbus, OH (United States)

1994-06-01T23:59:59.000Z

142

NETL: News Release - Vehicle-Mounted Natural Gas Leak Detector Passes Key  

NLE Websites -- All DOE Office Websites (Extended Search)

October 2, 2003 October 2, 2003 Vehicle-Mounted Natural Gas Leak Detector Passes Key "Road Test" Spots Natural Gas Leaks from 30 Feet Away At Speeds Approaching 20 Miles Per Hour Handheld Prototype Gas Detector Now Being Outfitted as a Van-Mounted Unit PSI has modified this early prototype of a handheld remote natural gas detector to operate from a moving vehicle. ANDOVER, MA - Physical Sciences Inc. (PSI) recently conducted a successful test of its mobile natural gas detector at the company's research facilities in Andover, Mass. PSI's prototype leak detector demonstrated its ability to spot natural gas leaks from a distance of up to 30 feet from a vehicle moving at speeds approaching 20 miles per hour. In the United States, significant resources are devoted annually to leak

143

Hanford Determines Double-Shell Tank Leaked Waste From Inner Tank |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Determines Double-Shell Tank Leaked Waste From Inner Tank Determines Double-Shell Tank Leaked Waste From Inner Tank Hanford Determines Double-Shell Tank Leaked Waste From Inner Tank October 22, 2012 - 12:00pm Addthis Media Contacts Lori Gamache, ORP 509-372-9130 John Britton, WRPS 509-376-5561 RICHLAND - The Department of Energy's Office of River Protection (ORP), working with its Hanford tank operations contractor Washington River Protection Solutions, has determined that there is a slow leak of chemical and radioactive waste into the annulus space in Tank AY-102, the approximately 30-inch area between the inner primary tank and the outer tank that serves as the secondary containment for these types of tanks. This is the first time a double-shell tank (DST) leak from the primary tank into the annulus has been identified. There is no indication of waste in

144

Fuel leak detection apparatus for gas cooled nuclear reactors  

SciTech Connect

Apparatus is disclosed for detecting nuclear fuel leaks within nuclear power system reactors, such as high temperature gas cooled reactors. The apparatus includes a probe assembly that is inserted into the high temperature reactor coolant gaseous stream. The probe has an aperture adapted to communicate gaseous fluid between its inside and outside surfaces and also contains an inner tube for sampling gaseous fluid present near the aperture. A high pressure supply of noncontaminated gas is provided to selectively balance the pressure of the stream being sampled to prevent gas from entering the probe through the aperture. The apparatus includes valves that are operable to cause various directional flows and pressures, which valves are located outside of the reactor walls to permit maintenance work and the like to be performed without shutting down the reactor.

Burnette, Richard D. (San Diego, CA)

1977-01-01T23:59:59.000Z

145

Purify: Fast detection of memory leaks and access errors  

E-Print Network (OSTI)

This paper describes Purifyru, a software testing and quality assurance Ool that detects memory leaks and access erors. Purify inserts additional checking instructions directly into the object code produced by existing compilers. These instructions check every memory read and write performed by the program-under-test and detect several types of access errors, such as reading uninitialized memory or witing to freed memory. Purify inserts checking logic into all of the code in a program, including third-party and vendor object-code libraries, and verifies system call interfaces. In addition, Purify tracks memory usage and identifies individual memory leals using a novel adaptation of garbage collection techniques. Purify produce standard executable files compatible with existing debuggers, and currently runs on Sun Microsystems ' SPARC family of workstations. Purify's neafly-comprehensive memory access checking slows the target program down typically by less than a facor of three and has resulted in significantly more reliable software for several development goups. L.

Reed Hastings; Bob Joyce

1991-01-01T23:59:59.000Z

146

Leak rate analysis of the Westinghouse Reactor Coolant Pump  

SciTech Connect

An independent analysis was performed by ETEC to determine what the seal leakage rates would be for the Westinghouse Reactor Coolant Pump (RCP) during a postulated station blackout resulting from loss of ac electric power. The object of the study was to determine leakage rates for the following conditions: Case 1: All three seals function. Case 2: No. 1 seal fails open while Nos. 2 and 3 seals function. Case 3: All three seals fail open. The ETEC analysis confirmed Westinghouse calculations on RCP seal performance for the conditions investigated. The leak rates predicted by ETEC were slightly lower than those predicted by Westinghouse for each of the three cases as summarized below. Case 1: ETEC predicted 19.6 gpm, Westinghouse predicted 21.1 gpm. Case 2: ETEC predicted 64.7 gpm, Westinghouse predicted 75.6 gpm. Case 3: ETEC predicted 422 gpm, Westinghouse predicted 480 gpm. 3 refs., 22 figs., 6 tabs.

Boardman, T.; Jeanmougin, N.; Lofaro, R.; Prevost, J.

1985-07-01T23:59:59.000Z

147

Building Energy Software Tools Directory: Sol Path  

NLE Websites -- All DOE Office Websites (Extended Search)

Sol Path Sol Path Sol Path logo. Graphically displays path of sun in the sky for any date and location. Good for quickly obtaining rough sun angle data, or understanding the general nature of the sun's motion. Screen Shots Keywords solar, sun, sun path Validation/Testing N/A Expertise Required None required. Users Several hundred regular users, split approximately evenly between U.S. and other countries. Audience Architects, energy analysts, home owners, educators. Input Location, date. Output Graphical display of sun path in the sky. Computer Platform Web Programming Language Macromedia Director / Shockwave Strengths Easy to use, instantaneous graphical output. Weaknesses Sometimes displays incomplete results for equatorial regions (latitude < 23 degrees). Contact Company: Sustainable By Design

148

Compliance Verification Paths for Residential and Commercial...  

NLE Websites -- All DOE Office Websites (Extended Search)

Verification Paths for Residential and Commercial Energy Codes Conformity assessment is a term used to describe the processes followed to demonstrate that a product, service,...

149

Thermal Imaging of Canals for Remote Detection of Leaks: Evaluation in the United Irrigation District  

E-Print Network (OSTI)

This report summarizes our initial analysis of the potential of thermal imaging for detecting leaking canals and pipelines. Thermal imagery (video format) was obtained during a fly over of a portion of the main canal of United Irrigation District. The video was processed to produce individual images, and 45 potential sites were identified as having possible canal leakage problems (see Appendix I for all 45 thermal images). District Management System Team personnel traveled to 11 of the 45 sites to determine if canal leakage was actually occurring. Of the 11 sites, 10 had leakage problems. Thus, thermal image analysis had a success rate of 91% for leak detection. Two sites had leaks classified as “severe” by the DMS Team. This report also provides a detailed analysis of 4 sites, 3 with leaks and 1 without. For each site, photographs are included showing the source of the leak and/or condition of the canal segment. A literature review of thermal imagery for leak detection is included in Appendix II. Our findings and recommendations are as following: 1. thermal imaging is a promising technique for evaluation of canal conditions and leak detection; 2. the district provide should provide personnel to help the DMS Team verify the remaining 34 sites; and 3. the district should consider correcting the problems identified at sites 7 and 8.

Huang, Yanbo; Fipps, Guy

2008-11-01T23:59:59.000Z

150

USING AN ADAPTER TO PERFORM THE CHALFANT-STYLE CONTAINMENT VESSEL PERIODIC MAINTENANCE LEAK RATE TEST  

Science Conference Proceedings (OSTI)

Recently the Packaging Technology and Pressurized Systems (PT&PS) organization at the Savannah River National Laboratory was asked to develop an adapter for performing the leak-rate test of a Chalfant-style containment vessel. The PT&PS organization collaborated with designers at the Department of Energy's Pantex Plant to develop the adapter currently in use for performing the leak-rate testing on the containment vessels. This paper will give the history of leak-rate testing of the Chalfant-style containment vessels, discuss the design concept for the adapter, give an overview of the design, and will present results of the testing done using the adapter.

Loftin, B.; Abramczyk, G.; Trapp, D.

2011-06-03T23:59:59.000Z

151

Demonstration of rapid and sensitive module leak certification for space station freedom  

SciTech Connect

A leak detection and quantification demonstration using perflurocarbon tracer (PFT) technology was successfully performed at the NASA Marshall Space Flight Center on January 25, 1991. The real-time Dual Trap Analyzer (DTA) at one-half hour after the start of the first run gave an estimated leak rate of 0.7 mL/min. This has since been refined to be 1.15 {plus minus} 0.09 mL/min. The leak rates in the next three runs were determined to be 9.8 {plus minus} 0.7, {minus}0.4 {plus minus} 0.3, and 76 {plus minus} 6 mL/min, respectively. The theory on leak quantification in the steady-state and time-dependent modes for a single zone test facility was developed and applied to the above determinations. The laboratory PFT analysis system gave a limit-of-detection (LOD) of 0.05 fL for ocPDCH. This is the tracer of choice and is about 100-fold better than that for the DTA. Applied to leak certification, the LOD is about 0.00002 mL/s (0.000075 L/h), a 5 order-of-magnitude improvement over the original leak certification specification. Furthermore, this limit can be attained in a measurement period of 3 to 4 hours instead of days, weeks, or months. A new Leak Certification Facility is also proposed to provide for zonal (three zones) determination of leak rates. The appropriate multizone equations, their solutions, and error analysis have already been derived. A new concept of seal-integrity certification has been demonstrated for a variety of controlled leaks in the range of module leak testing. High structural integrity leaks were shown to have a linear dependence of flow on {Delta}p. The rapid determination of leak rates at different pressures is proposed and is to be determined while subjecting the module to other external force-generating parameters such as vibration, torque, solar intensity, etc. 13 refs.

Dietz, R.N.; Goodrich, R.W. (Brookhaven National Lab., Upton, NY (United States))

1991-03-01T23:59:59.000Z

152

Demonstration of rapid and sensitive module leak certification for space station freedom. Final report  

SciTech Connect

A leak detection and quantification demonstration using perflurocarbon tracer (PFT) technology was successfully performed at the NASA Marshall Space Flight Center on January 25, 1991. The real-time Dual Trap Analyzer (DTA) at one-half hour after the start of the first run gave an estimated leak rate of 0.7 mL/min. This has since been refined to be 1.15 {plus_minus} 0.09 mL/min. The leak rates in the next three runs were determined to be 9.8 {plus_minus} 0.7, {minus}0.4 {plus_minus} 0.3, and 76 {plus_minus} 6 mL/min, respectively. The theory on leak quantification in the steady-state and time-dependent modes for a single zone test facility was developed and applied to the above determinations. The laboratory PFT analysis system gave a limit-of-detection (LOD) of 0.05 fL for ocPDCH. This is the tracer of choice and is about 100-fold better than that for the DTA. Applied to leak certification, the LOD is about 0.00002 mL/s (0.000075 L/h), a 5 order-of-magnitude improvement over the original leak certification specification. Furthermore, this limit can be attained in a measurement period of 3 to 4 hours instead of days, weeks, or months. A new Leak Certification Facility is also proposed to provide for zonal (three zones) determination of leak rates. The appropriate multizone equations, their solutions, and error analysis have already been derived. A new concept of seal-integrity certification has been demonstrated for a variety of controlled leaks in the range of module leak testing. High structural integrity leaks were shown to have a linear dependence of flow on {Delta}p. The rapid determination of leak rates at different pressures is proposed and is to be determined while subjecting the module to other external force-generating parameters such as vibration, torque, solar intensity, etc. 13 refs.

Dietz, R.N.; Goodrich, R.W. [Brookhaven National Lab., Upton, NY (United States)

1991-03-01T23:59:59.000Z

153

Plan for support of large-plant (post-CRBR) needs in large-leak sodium-water reaction area  

SciTech Connect

Work in the large leak test and analysis area of steam generator development has been carried out at GE-ARSD under 189a SG037 since 1973. The currently planned master schedule for the SG037 program is shown. Principal activities are the large leak testing program being carried out at the Large Leak Test Rig and the analysis methods development. The plan for supporting the large plant (post-CRBR) needs in the large leak sodium-water reaction area is outlined. Most of the needs will be answered in the current SG037 large leak program. (DLC)

Whipple, J.C.

1980-03-01T23:59:59.000Z

154

Deep Space Formation Flying Spacecraft Path Planning  

Science Conference Proceedings (OSTI)

Efficient algorithms for collision-free energy sub-optimal path planning for formations of spacecraft flying in deep space are presented. The idea is to introduce a set of way-points through which the spacecraft are required to pass, combined with ... Keywords: formation flying spacecraft, path planning for multiple mobile robot systems, trajectory generation

Cornel Sultan; Sanjeev Seereram; Raman K. Mehra

2007-04-01T23:59:59.000Z

155

Evaluation of Calcine Disposition Path Forward  

SciTech Connect

This document describes an evaluation of the baseline and two alternative disposition paths for the final disposition of the calcine wastes stored at the Idaho Nuclear Technology and Engineering Center at the Idaho National Engineering and Environmental Laboratory. The pathways are evaluated against a prescribed set of criteria and a recommendation is made for the path forward.

Birrer, S.A.; Heiser, M.B.

2003-02-26T23:59:59.000Z

156

Evaluation of Calcine Disposition - Path Forward  

SciTech Connect

This document describes an evaluation of the baseline and two alternative disposition paths for the final disposition of the calcine wastes stored at the Idaho Nuclear Technology and Engineering Center at the Idaho National Engineering and Environmental Laboratory. The pathways are evaluated against a prescribed set of criteria and a recommendation is made for the path forward.

Steve Birrer

2003-02-01T23:59:59.000Z

157

On-The-Fly Path Reduction  

Science Conference Proceedings (OSTI)

Path reduction is a well-known technique to alleviate the state-explosion problem incurred by explicit-state model checking, its key idea being to store states only at predetermined breaking points. This paper presents an adaptation of this technique ... Keywords: model checking, path reduction, state explosion, verification

Sebastian Biallas; Jörg Brauer; Dominique Gückel; Stefan Kowalewski

2011-08-01T23:59:59.000Z

158

Path dependent analysis of logic programs  

Science Conference Proceedings (OSTI)

This paper presents an abstract semantics that uses information about execution paths to improve precision of data flow analyses of logic programs. We illustrate the abstract semantics by abstracting execution paths using call strings of fixed length ... Keywords: Abstract interpretation, Call strings, Context sensitive analysis

Lunjin Lu

2002-01-01T23:59:59.000Z

159

Path Dependent Analysis of Logic Programs  

Science Conference Proceedings (OSTI)

This paper presents an abstract semantics that uses information about execution paths to improve precision of data flow analyses of logic programs. The abstract semantics is illustrated by abstracting execution paths using call strings of fixed length ... Keywords: abstract interpretation, call strings, context sensitive analysis

Lunjin Lu

2003-12-01T23:59:59.000Z

160

Bootstrapping path-based pronoun resolution  

Science Conference Proceedings (OSTI)

We present an approach to pronoun resolution based on syntactic paths. Through a simple bootstrapping procedure, we learn the likelihood of coreference between a pronoun and a candidate noun based on the path in the parse tree between the two entities. ...

Shane Bergsma; Dekang Lin

2006-07-01T23:59:59.000Z

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


161

The Path of Carbon in Photosynthesis VI.  

DOE R&D Accomplishments (OSTI)

This paper is a compilation of the essential results of our experimental work in the determination of the path of carbon in photosynthesis. There are discussions of the dark fixation of photosynthesis and methods of separation and identification including paper chromatography and radioautography. The definition of the path of carbon in photosynthesis by the distribution of radioactivity within the compounds is described.

Calvin, M.

1949-06-30T23:59:59.000Z

162

THE PATH OF OXYGEN IN PHOTOSYNTHESIS  

E-Print Network (OSTI)

48 THE PATH OF O Y m IN PHOTOSYNTHESIS X G Go D, Dorough andTm PATH OF O Y E I N PHOTOSYNTHESIS X G N by Go D, Doroughe s e workers found that, photosynthesis i s represented by

Dorough, G.D.; Calvin, M.

1950-01-01T23:59:59.000Z

163

The Path of Carbon in Photosynthesis VI.  

DOE Green Energy (OSTI)

This paper is a compilation of the essential results of our experimental work in the determination of the path of carbon in photosynthesis. There are discussions of the dark fixation of photosynthesis and methods of separation and identification including paper chromatography and radioautography. The definition of the path of carbon in photosynthesis by the distribution of radioactivity Within the compounds is described.

Calvin, M.

1949-06-30T23:59:59.000Z

164

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (3 of 4) BP Oil Spill Footage...

165

BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Leak at 4850' - June 3 2010 (2 of 4) BP Oil Spill Footage...

166

BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Field Sites Power Marketing Administration Other Agencies You are here Home BP Oil Spill Footage (High Def) - Leak at 4840' - June 3 2010 (1 of 4) BP Oil Spill Footage...

167

Bhopal Gas Leak: A Numerical Investigation of the Prevailing Meteorological Conditions  

Science Conference Proceedings (OSTI)

A three-dimensional mesoscale model was used to understand the meteorological conditions and the influence of the terrain on the local flow pattern during the Bhopal methyl isocyanate (MIC) gas leak. The study reveals that under the prevailing ...

Maithili Sharan; S. G. Gopalakrishnan; R. T. McNider; M. P. Singh

1996-10-01T23:59:59.000Z

168

AIRBORNE, OPTICAL REMOTE SENSNG OF METHANE AND ETHANE FOR NATURAL GAS PIPELINE LEAK DETECTION  

SciTech Connect

Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. The scope of the work involved designing and developing an airborne, optical remote sensor capable of sensing methane and, if possible, ethane for the detection of natural gas pipeline leaks. Flight testing using a custom dual wavelength, high power fiber amplifier was initiated in February 2005. Ophir successfully demonstrated the airborne system, showing that it was capable of discerning small amounts of methane from a simulated pipeline leak. Leak rates as low as 150 standard cubic feet per hour (scf/h) were detected by the airborne sensor.

Jerry Myers

2005-04-15T23:59:59.000Z

169

Pre-test evaluation of LLTR Series II Test A-6. [Large Leak Test Facility  

SciTech Connect

Purpose of this report is to present pre-test predictions of pressure histories for the A6 test to be conducted in the Large Leak Test Facility (LLTF) at the Energy Technology Engineering Center. A6 is part of a test program being conducted to evaluate the effects of leaks produced by a double-ended guillotine rupture of a single tube. A6 will provide data on the CRBR prototypical double rupture disc performance.

Knittle, D.

1980-11-01T23:59:59.000Z

170

An Evaluation of Time Dependent Leak Rates in Degraded Steam Generator Tubing  

Science Conference Proceedings (OSTI)

The U.S. Nuclear Regulatory Commission sponsored leak rate tests of steam generator (SG) tubing with stress corrosion cracks and electrodischarged machining (EDM) notches at Argonne National Laboratory (ANL). Some test specimens displayed time-dependent leak rate increases when the pressure was held constant. Post-test visual examination clearly revealed that the outside diameter (OD) crack length of these specimens had increased. It was suspected that fatigue due to jet/structure interaction was respons...

2008-10-08T23:59:59.000Z

171

Calculation notes in support of TWRS FSAR spray leak accident analysis  

SciTech Connect

This document contains the detailed calculations that support the spray leak accident analysis in the Tank Waste Remediation System (TWRS) Final Safety Analysis Report (FSAR). The consequence analyses in this document form the basis for the selection of controls to mitigate or prevent spray leaks throughout TWRS. Pressurized spray leaks can occur due to a breach in containment barriers along transfer routes, during waste transfers. Spray leaks are of particular safety concern because, depending on leak dimensions, and waste pressure, they can be relatively efficient generators of dispersible sized aerosols that can transport downwind to onsite and offsite receptors. Waste is transferred between storage tanks and between processing facilities and storage tanks in TWRS through a system of buried transfer lines. Pumps for transferring waste and jumpers and valves for rerouting waste are located inside below grade pits and structures that are normally covered. Pressurized spray leaks can emanate to the atmosphere due to breaches in waste transfer associated equipment inside these structures should the structures be uncovered at the time of the leak. Pressurized spray leaks can develop through holes or cracks in transfer piping, valve bodies or pump casings caused by such mechanisms as corrosion, erosion, thermal stress, or water hammer. Leaks through degraded valve packing, jumper gaskets, or pump seals can also result in pressurized spray releases. Mechanisms that can degrade seals, packing and gaskets include aging, radiation hardening, thermal stress, etc. An1782other common cause for spray leaks inside transfer enclosures are misaligned jumpers caused by human error. A spray leak inside a DST valve pit during a transfer of aging waste was selected as the bounding, representative accident for detailed analysis. Sections 2 through 5 below develop this representative accident using the DOE- STD-3009 format. Sections 2 describes the unmitigated and mitigated accident scenarios evaluated to determine the need for safety class SSCs or TSR controls. Section 3 develops the source terms associated with the unmitigated and mitigated accident scenarios. Section 4 estimates the radiological and toxicological consequences for the unmitigated and mitigated scenarios. Section 5 compares the radiological and toxicological consequences against the TWRS evaluation guidelines. Section 6 extrapolates from the representative accident case to other represented spray leak sites to assess the conservatism in using the representative case to define controls for other postulated spray leak sites throughout TWRS. Section 7 discusses the sensitivities of the consequence analyses to the key parameters and assumptions used in the analyses. Conclusions are drawn in Section 8. The analyses herein pertain to spray leaks initiated due to internal mechanisms (e.g., corrosion, erosion, thermal stress, etc). External initiators of spray leaks (e.g., excavation accidents), and natural phenomena initiators (e.g., seismic events) are to be covered in separate accident analyses.

Hall, B.W.

1996-09-25T23:59:59.000Z

172

Leak Detection and H2 Sensor Development for Hydrogen Applications  

DOE Green Energy (OSTI)

The objectives of this report are: (1) Develop a low cost, low power, durable, and reliable hydrogen safety sensor for a wide range of vehicle and infrastructure applications; (2) Continually advance test prototypes guided by materials selection, sensor design, electrochemical R&D investigation, fabrication, and rigorous life testing; (3) Disseminate packaged sensor prototypes and control systems to DOE Laboratories and commercial parties interested in testing and fielding advanced prototypes for cross-validation; (4) Evaluate manufacturing approaches for commercialization; and (5) Engage an industrial partner and execute technology transfer. Recent developments in the search for sustainable and renewable energy coupled with the advancements in fuel cell powered vehicles (FCVs) have augmented the demand for hydrogen safety sensors. There are several sensor technologies that have been developed to detect hydrogen, including deployed systems to detect leaks in manned space systems and hydrogen safety sensors for laboratory and industrial usage. Among the several sensing methods electrochemical devices that utilize high temperature-based ceramic electrolytes are largely unaffected by changes in humidity and are more resilient to electrode or electrolyte poisoning. The desired sensing technique should meet a detection threshold of 1% (10,000 ppm) H{sub 2} and response time of {approx_equal}1 min, which is a target for infrastructure and vehicular uses. Further, a review of electrochemical hydrogen sensors by Korotcenkov et.al and the report by Glass et.al suggest the need for inexpensive, low power, and compact sensors with long-term stability, minimal cross-sensitivity, and fast response. This view has been largely validated and supported by the fuel cell and hydrogen infrastructure industries by the NREL/DOE Hydrogen Sensor Workshop held on June 8, 2011. Many of the issues preventing widespread adoption of best-available hydrogen sensing technologies available today outside of cost, derive from excessive false positives and false negatives arising from signal drift and unstable sensor baseline; both of these problems necessitate the need for unacceptable frequent calibration.

Brosha, Eric L. [Los Alamos National Laboratory

2012-07-10T23:59:59.000Z

173

Definition: Scheduling Path | Open Energy Information  

Open Energy Info (EERE)

Scheduling Path Scheduling Path Jump to: navigation, search Dictionary.png Scheduling Path The Transmission Service arrangements reserved by the Purchasing-Selling Entity for a Transaction.[1] Related Terms transmission lines, Purchasing-Selling Entity, Transmission Service, transmission line References ↑ Glossary of Terms Used in Reliability Standards An inl LikeLike UnlikeLike You like this.Sign Up to see what your friends like. ine Glossary Definition Retrieved from "http://en.openei.org/w/index.php?title=Definition:Scheduling_Path&oldid=480301" Categories: Definitions ISGAN Definitions What links here Related changes Special pages Printable version Permanent link Browse properties 429 Throttled (bot load) Error 429 Throttled (bot load) Throttled (bot load) Guru Meditation:

174

Path integration for light transport in volumes  

Science Conference Proceedings (OSTI)

Simulating the transport of light in volumes such as clouds or objects with subsurface scattering is computationally expensive. We describe an approximation to such transport using path integration. Unlike the more commonly used diffusion approximation, ...

Simon Premože; Michael Ashikhmin; Peter Shirley

2003-06-01T23:59:59.000Z

175

Path inference in data center networks  

Science Conference Proceedings (OSTI)

Path inference is the ability to determine the sequence of devices traversed by a packet within an IP network. This is a fundamental building block for several network and service management applications such as troubleshooting, planning, and ...

Kyriaki Levanti, Vijay Gopalakrishnan, Hyong S. Kim, Seungjoon Lee, Emmanuil Mavrogiorgis, Aman Shaikh

2012-10-01T23:59:59.000Z

176

Steam Path Audits on Industrial Steam Turbines  

E-Print Network (OSTI)

The electric utility industry has benefitted from steam path audits on steam turbines for several years. Benefits include the ability to identify areas of performance degradation during a turbine outage. Repair priorities can then be set in accordance with quantitative results from the steam path audit. As a result of optimized repair decisions, turbine efficiency increases, emissions decrease, and maintenance expenses decrease. These benefits can be achieved by using a computer program Encotech, Inc. developed for the utility industry to perform steam path audits. With the increased emphasis on industrial turbine efficiency, and as a result of the experience with the Destec Operating Company, Encotech is adapting the computer program to respond to the needs of the industrial steam turbine community. This paper describes the results of using the STPE computer program to conduct a steam path audit at Destec Energy's Lyondell Cogeneration power plant.

Mitchell, D. R.

1992-04-01T23:59:59.000Z

177

Path of Carbon in Photosynthesis III  

E-Print Network (OSTI)

TIIE PAT3 OF C R O IN PHOTOSYNTHESIS A B K A. A. Benson andin the early products of photosynthesis, we Stepka, W. , inP THE PATH OF CARBON IN PHOTOSYNTHESIS. 111. BY A. A. Benson

Benson, A.A.; Calvin, M.

2008-01-01T23:59:59.000Z

178

THE PATH OF OXYGEN IN PHOTOSYNTHESIS  

DOE Green Energy (OSTI)

An experiment is described in which an attempt is made to follow the path of oxygen in photosynthesis by the use of O{sup 18} as a tracer.

Dorough, G.D.; Calvin, M.

1950-03-31T23:59:59.000Z

179

Geomagnetic Reversals: Rates, Timescales, Preferred Paths,  

E-Print Network (OSTI)

Geomagnetic Reversals: Rates, Timescales, Preferred Paths, Statistical Models and Simulations: Geomagnetic reversals, Reversal rates, Paleointensity, Statistics of Geodynamo September 30, 2001 #12;Abstract Paleomagnetic data on geomagnetic reversals are divided into two general categories: times of occurrence

Constable, Catherine G.

180

EnerPath | Open Energy Information  

Open Energy Info (EERE)

EnerPath EnerPath Jump to: navigation, search Logo: EnerPath Name EnerPath Address 1758 Orange Tree Lane Place Redlands, California Zip 92374 Sector Buildings, Efficiency, Services Product Energy Efficiency Programs Number of employees 51-200 Website http://www.enerpath.com Coordinates 34.0678193°, -117.2147181° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.0678193,"lon":-117.2147181,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

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181

Briefing: DOE EM Landfill Workshop & Path Forward | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Landfill Workshop & Path Forward Briefing: DOE EM Landfill Workshop & Path Forward By: Office of Groundwater and Soil Remediation Where: SSAB Teleconference 2 Subject: DOE EM...

182

Event:Lighting Our Path: The Philips Experience in Promoting...  

Open Energy Info (EERE)

Lighting Our Path: The Philips Experience in Promoting Advanced Lighting Technologies Jump to: navigation, search Calendar.png Lighting Our Path: The Philips Experience in...

183

Feasible Offset Region Based Tool Path Planning for Face Milling  

E-Print Network (OSTI)

Path Planning for Face Milling, Masters Report, UniversityPath Planning for Face Milling Prabhu Ramachandran Sponsoredburr formation while face milling powertrain components in

Ramachandran, Prabhu; Dornfeld, David A

2003-01-01T23:59:59.000Z

184

BrightPath Energy LLC | Open Energy Information  

Open Energy Info (EERE)

New York . References "BrightPath Energy LLC" Retrieved from "http:en.openei.orgwindex.php?titleBrightPathEnergyLLC&oldid343040" Categories: Clean Energy Organizations...

185

AUTOMATED LEAK DETECTION OF BURIED TANKS USING GEOPHYSICAL METHODS AT THE HANFORD NUCLEAR SITE  

SciTech Connect

At the Hanford Nuclear Site in Washington State, the Department of Energy oversees the containment, treatment, and retrieval of liquid high-level radioactive waste. Much of the waste is stored in single-shelled tanks (SSTs) built between 1943 and 1964. Currently, the waste is being retrieved from the SSTs and transferred into newer double-shelled tanks (DSTs) for temporary storage before final treatment. Monitoring the tanks during the retrieval process is critical to identifying leaks. An electrically-based geophysics monitoring program for leak detection and monitoring (LDM) has been successfully deployed on several SSTs at the Hanford site since 2004. The monitoring program takes advantage of changes in contact resistance that will occur when conductive tank liquid leaks into the soil. During monitoring, electrical current is transmitted on a number of different electrode types (e.g., steel cased wells and surface electrodes) while voltages are measured on all other electrodes, including the tanks. Data acquisition hardware and software allow for continuous real-time monitoring of the received voltages and the leak assessment is conducted through a time-series data analysis. The specific hardware and software combination creates a highly sensitive method of leak detection, complementing existing drywell logging as a means to detect and quantify leaks. Working in an industrial environment such as the Hanford site presents many challenges for electrical monitoring: cathodic protection, grounded electrical infrastructure, lightning strikes, diurnal and seasonal temperature trends, and precipitation, all of which create a complex environment for leak detection. In this discussion we present examples of challenges and solutions to working in the tank farms of the Hanford site.

CALENDINE S; SCHOFIELD JS; LEVITT MT; FINK JB; RUCKER DF

2011-03-30T23:59:59.000Z

186

Locating of leaks in water-cooled generator stator bars using perfluorocarbon tracers  

SciTech Connect

Water cooled stator bars in power plant generators often fail during the maintenance cycle due to water leakage. After the hydrogen pressure in the generator shell has been released water can leak through cracks in the copper and through the insulation. Leaking bars, but not the leaks themselves, are detected with so-called ``hi-pot`` (high potential) tests where direct electrical current is applied to the stator bar windings. A study initiated by ConEd and Brookhaven`s Tracer Technology Center to explore the cause of these leakage problems to determine if the failures originate in the manufacturing process or are created in service by phase related torque stresses. To this purpose bars that had failed the hi-pot test were investigated first with the insulation in place and then stripped to the bare copper. The bars were pressurized with gases containing perfluorocarbon tracers and the magnitude and location of the leaks was detected by using tracers technology principles and instruments such as the ``double source`` method and the Dual Trap Analyzer. In the second part of the project the windings within a generator were tested in-situ for leaks during an outage using tracer principles. Recommendations are given suggesting the shut down of stator bar cooling water before hydrogen bleeding during outages and a revision of the current vent flow rate. The new standard should establish a reasonable leak rate for the stator bar windings proper and exclude leakage of pump seals and connections. Testing during the maintenance cycle in generators should include routine tracer leak detection following the hi-pot test.

Loss, W.M.; Dietz, R.N.

1991-09-01T23:59:59.000Z

187

Locating of leaks in water-cooled generator stator bars using perfluorocarbon tracers  

SciTech Connect

Water cooled stator bars in power plant generators often fail during the maintenance cycle due to water leakage. After the hydrogen pressure in the generator shell has been released water can leak through cracks in the copper and through the insulation. Leaking bars, but not the leaks themselves, are detected with so-called hi-pot'' (high potential) tests where direct electrical current is applied to the stator bar windings. A study initiated by ConEd and Brookhaven's Tracer Technology Center to explore the cause of these leakage problems to determine if the failures originate in the manufacturing process or are created in service by phase related torque stresses. To this purpose bars that had failed the hi-pot test were investigated first with the insulation in place and then stripped to the bare copper. The bars were pressurized with gases containing perfluorocarbon tracers and the magnitude and location of the leaks was detected by using tracers technology principles and instruments such as the double source'' method and the Dual Trap Analyzer. In the second part of the project the windings within a generator were tested in-situ for leaks during an outage using tracer principles. Recommendations are given suggesting the shut down of stator bar cooling water before hydrogen bleeding during outages and a revision of the current vent flow rate. The new standard should establish a reasonable leak rate for the stator bar windings proper and exclude leakage of pump seals and connections. Testing during the maintenance cycle in generators should include routine tracer leak detection following the hi-pot test.

Loss, W.M.; Dietz, R.N.

1991-09-01T23:59:59.000Z

188

Flight Testing of an Advanced Airborne Natural Gas Leak Detection System  

SciTech Connect

ITT Industries Space Systems Division (Space Systems) has developed an airborne natural gas leak detection system designed to detect, image, quantify, and precisely locate leaks from natural gas transmission pipelines. This system is called the Airborne Natural Gas Emission Lidar (ANGEL) system. The ANGEL system uses a highly sensitive differential absorption Lidar technology to remotely detect pipeline leaks. The ANGEL System is operated from a fixed wing aircraft and includes automatic scanning, pointing system, and pilot guidance systems. During a pipeline inspection, the ANGEL system aircraft flies at an elevation of 1000 feet above the ground at speeds of between 100 and 150 mph. Under this contract with DOE/NETL, Space Systems was funded to integrate the ANGEL sensor into a test aircraft and conduct a series of flight tests over a variety of test targets including simulated natural gas pipeline leaks. Following early tests in upstate New York in the summer of 2004, the ANGEL system was deployed to Casper, Wyoming to participate in a set of DOE-sponsored field tests at the Rocky Mountain Oilfield Testing Center (RMOTC). At RMOTC the Space Systems team completed integration of the system and flew an operational system for the first time. The ANGEL system flew 2 missions/day for the duration for the 5-day test. Over the course of the week the ANGEL System detected leaks ranging from 100 to 5,000 scfh.

Dawn Lenz; Raymond T. Lines; Darryl Murdock; Jeffrey Owen; Steven Stearns; Michael Stoogenke

2005-10-01T23:59:59.000Z

189

Leak potential index model for use in priority ranking of underground storage tanks at formerly used defense sites. Final report  

SciTech Connect

Abandoned underground storage tanks (USTs) that have not been properly closed at formerlC used defense sites (FUDS) may present potential leaking problems, spilling their hazardous contents into nearby soils, groundwater, and well water. The leaking USTs are potential sources of contaminants generally classified as containerized hazardous, toxic, and radioactive waste (CON/HTRW). CON/IITRW includes petroleum, oil, and lubricants (POL), benzene, toluene, ethylbenzene, xylene (BTEX), and radioactive waste products. The risk to the environment and population associated with the leaking USTs depends not only on the source, but on the migration pathway factor (MPF) (i.e., the ability of the medium of transport such as soil or water-to effectively transport the contaminants to the receptor) and finally on the relative vulnerability of the potential receptor. Thus, the assessment of the relative risk begins with the calculation of the potential of the UST to leak. A method of predicting the risk of leakage of these USTs is therefore desirable. presently, however, leak prediction index (LPI) models (which are used to predict the age at which a UST will leak or the probability of a UST leak at any given age) require soil data that are not readily available, or not easily and economically obtained by LPI.model users. The Warren Rogers leak prediction model was developed circa 1981, and has been used for USTs and incorporated into leak prediction models for other types of underground steel structures.

Stephenson, L.D.

1998-03-01T23:59:59.000Z

190

Acceptance test report for the AN valve pit leak detection and low point drain assembly mock up test procedure  

SciTech Connect

This document describes The Performance Mock-up Test Procedure for the Valve Pit Leak Detection and Low Point Drain Assembly Performance Mock-Up Test Procedure.

EWER, K.L.

1999-07-20T23:59:59.000Z

191

Modelling pronunciation variation with single-path and multi-path syllable models: Issues to consider  

Science Conference Proceedings (OSTI)

In this paper, we construct context-independent single-path and multi-path syllable models aimed at improved pronunciation variation modelling. We use phonetic transcriptions to define the topologies of the syllable models and to initialise the model ... Keywords: ASR, HMM, Pronunciation variation, Syllable, Topology

Annika Hämäläinen; Louis ten Bosch; Lou Boves

2009-02-01T23:59:59.000Z

192

MEMOIRS OF A LEAK: Infiltrating Research for a Quarter of a Century  

NLE Websites -- All DOE Office Websites (Extended Search)

MEMOIRS OF A LEAK: Infiltrating Research for a Quarter of a Century MEMOIRS OF A LEAK: Infiltrating Research for a Quarter of a Century Speaker(s): Max Sherman Date: November 16, 2000 - 12:00pm Location: Bldg. 90 Seminar Host/Point of Contact: David Faulkner Infiltration is the (usually uncontrolled) flow of air through leaks in the building envelope, driven by natural and mechanical pressures. Before the oil crises, there was not a lot of interest in infiltration. For houses and other envelope-dominated buildings, however, infiltration typically accounted for all of their ventilation needs and 1/3-1/2 of their space-conditioning load. Starting in the mid-70s there was a realization that this important problem was not well understood, but represented an important energy-saving opportunity. Research institutions around the world

193

SIXTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton{reg_sign} GLT O-rings used in the Model 9975 package has been ongoing for seven years at the Savannah River National Laboratory. Seventy tests using mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 F. They were leak-tested initially and have been tested periodically to determine if they meet the criterion of leak-tightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 F. High temperature aging continues for 33 GLT O-ring fixtures at 200-300 F. Room temperature leak test failures have been experienced in all of the GLT O-ring fixtures aging at 350 F and higher temperatures, and in 7 fixtures aging at 300 F. No failures have yet been observed in GLT O-ring fixtures aging at 200 F for 41-60 months, which is still bounding to O-ring temperatures during storage in K-Area Complex (KAC). Based on expectations that the fixtures aging at 200 F will remain leak-tight for a significant period yet to come, 2 additional fixtures began aging within the past year at an intermediate temperature of 270 F, with hopes that they may leak before the 200 F fixtures. High temperature aging continues for 6 GLT-S O-ring fixtures at 200-300 F. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 F. No failures have yet been observed in GLT-S O-ring fixtures aging at 200-300 F for up to 26 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the Orings displayed a compression set ranging from 51-96%. This is greater than seen to date for packages inspected during KAC field surveillance (24% average). For GLT O-rings, separate service life estimates have been made based on the O-ring fixture leak test data and based on compression stress relaxation (CSR) data. These two predictive models show reasonable agreement at higher temperatures (350-400 F). However, at 300 F, the room temperature leak test failures to date experienced longer aging times than predicted by the CSR-based model. This suggests that extrapolations of the CSR model predictions to temperatures below 300 F will provide a conservative prediction of service life relative to the leak rate criterion. Leak test failure data at lower temperatures are needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining fixtures.

Daugherty, W.

2011-08-31T23:59:59.000Z

194

Saltwell Leak Detector Station Programmable Logic Controller (PLC) Software Configuration Management Plan (SCMP)  

Science Conference Proceedings (OSTI)

This document provides the procedures and guidelines necessary for computer software configuration management activities during the operation and maintenance phases of the Saltwell Leak Detector Stations as required by HNF-PRO-309, Rev. 1, Computer Software Quality Assurance, Section 2.4, Software Configuration Management. The software configuration management plan (SCMP) integrates technical and administrative controls to establish and maintain technical consistency among requirements, physical configuration, and documentation for the Saltwell Leak Detector Station Programmable Logic Controller (PLC) software during the Hanford application, operations and maintenance. This SCMP establishes the Saltwell Leak Detector Station PLC Software Baseline, status changes to that baseline, and ensures that software meets design and operational requirements and is tested in accordance with their design basis.

WHITE, K.A.

2000-11-28T23:59:59.000Z

195

Intermediate leak protection/automatic shutdown for B and W helical coil steam generator  

SciTech Connect

The report summarizes a follow-on study to the multi-tiered Intermediate Leak/Automatic Shutdown System report. It makes the automatic shutdown system specific to the Babcock and Wilcox (B and W) helical coil steam generator and to the Large Development LMFBR Plant. Threshold leak criteria specific to this steam generator design are developed, and performance predictions are presented for a multi-tier intermediate leak, automatic shutdown system applied to this unit. Preliminary performance predictions for application to the helical coil steam generator were given in the referenced report; for the most part, these predictions have been confirmed. The importance of including a cover gas hydrogen meter in this unit is demonstrated by calculation of a response time one-fifth that of an in-sodium meter at hot standby and refueling conditions.

1981-01-01T23:59:59.000Z

196

A survey on coverage path planning for robotics  

Science Conference Proceedings (OSTI)

Coverage Path Planning (CPP) is the task of determining a path that passes over all points of an area or volume of interest while avoiding obstacles. This task is integral to many robotic applications, such as vacuum cleaning robots, painter robots, ... Keywords: Coverage path planning, Motion planning, Path planning

Enric Galceran, Marc Carreras

2013-12-01T23:59:59.000Z

197

A taxonomy of integral reaction path analysis  

Science Conference Proceedings (OSTI)

W. C. Gardiner observed that achieving understanding through combustion modeling is limited by the ability to recognize the implications of what has been computed and to draw conclusions about the elementary steps underlying the reaction mechanism. This difficulty can be overcome in part by making better use of reaction path analysis in the context of multidimensional flame simulations. Following a survey of current practice, an integral reaction flux is formulated in terms of conserved scalars that can be calculated in a fully automated way. Conditional analyses are then introduced, and a taxonomy for bidirectional path analysis is explored. Many examples illustrate the resulting path analysis and uncover some new results about nonpremixed methane-air laminar jets.

Grcar, Joseph F.; Day, Marcus S.; Bell, John B.

2004-12-23T23:59:59.000Z

198

Modular, High-Volume Fuel Cell Leak-Test Suite and Process  

DOE Green Energy (OSTI)

Fuel cell stacks are typically hand-assembled and tested. As a result the manufacturing process is labor-intensive and time-consuming. The fluid leakage in fuel cell stacks may reduce fuel cell performance, damage fuel cell stack, or even cause fire and become a safety hazard. Leak check is a critical step in the fuel cell stack manufacturing. The fuel cell industry is in need of fuel cell leak-test processes and equipment that is automatic, robust, and high throughput. The equipment should reduce fuel cell manufacturing cost.

Ru Chen; Ian Kaye

2012-03-12T23:59:59.000Z

199

SEVENTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton® GLT O-rings used in the Model 9975 package has been ongoing since 2004 at the Savannah River National Laboratory. Seventy tests using mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 ºF. They were leak-tested initially and have been tested periodically to determine if they meet the criterion of leak-tightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 ºF. High temperature aging continues for 23 GLT O-ring fixtures at 200 – 270 ºF. Room temperature leak test failures have been experienced in all of the GLT O-ring fixtures aging at 350 ºF and higher temperatures, and in 8 fixtures aging at 300 ºF. The remaining GLT O-ring fixtures aging at 300 ºF have been retired from testing following more than 5 years at temperature without failure. No failures have yet been observed in GLT O-ring fixtures aging at 200 ºF for 54-72 months, which is still bounding to O-ring temperatures during storage in K-Area Complex (KAC). Based on expectations that the fixtures aging at 200 ºF will remain leak-tight for a significant period yet to come, 2 additional fixtures began aging in 2011 at an intermediate temperature of 270 ºF, with hopes that they may reach a failure condition before the 200 ºF fixtures. High temperature aging continues for 6 GLT-S O-ring fixtures at 200 – 300 ºF. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 ºF. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 - 300 ºF for 30 - 36 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the O-rings displayed a compression set ranging from 51 – 96%. This is greater than seen to date for any packages inspected during KAC field surveillance (24% average). For GLT O-rings, separate service life estimates have been made based on the O-ring fixture leak test data and based on compression stress relaxation (CSR) data. These two predictive models show reasonable agreement at higher temperatures (350 – 400 ºF). However, at 300 ºF, the room temperature leak test failures to date experienced longer aging times than predicted by the CSRbased model. This suggests that extrapolations of the CSR model predictions to temperatures below 300 ºF will provide a conservative prediction of service life relative to the leak rate criterion. Leak test failure data at lower temperatures are needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining PCV O-ring fixtures.

Daugherty, W.

2012-08-30T23:59:59.000Z

200

Efficient model-based leak detection in boiler steam-water systems Xi Sun, Tongwen Chen *, Horacio J. Marquez  

E-Print Network (OSTI)

Efficient model-based leak detection in boiler steam-water systems Xi Sun, Tongwen Chen *, Horacio detection in boiler steam-water systems. The algorithm has been tested using real industrial data from Syncrude Canada, and has proven to be effective in detection of boiler tube or steam leaks; proper

Marquez, Horacio J.

Note: This page contains sample records for the topic "lpf leak path" 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

Acetic Acid Sclerotherapy for Treatment of a Bile Leak from an Isolated Bile Duct After Laparoscopic Cholecystectomy  

Science Conference Proceedings (OSTI)

Bile leak after laparoscopic cholecystectomy is not uncommon, and it mainly occurs from the cystic duct stump and can be easily treated by endoscopic techniques. However, treatment for leakage from an isolated bile duct can be troublesome. We report a successful case of acetic acid sclerotherapy for bile leak from an isolated bile duct after laparoscopic cholecystectomy.

Choi, Gibok, E-mail: choigibok@yahoo.co.kr; Eun, Choong Ki, E-mail: ilovegod@chollian.net [Inje University, Department of Radiology, Haeundae Paik Hospital, College of Medicine (Korea, Republic of); Choi, HyunWook, E-mail: gdkid92@daum.net [Maryknoll Medical Center, Department of Radiology (Korea, Republic of)

2011-02-15T23:59:59.000Z

202

Study on New Methods of Improving the Accuracy of Leak Detection and Location of Natural Gas Pipeline  

Science Conference Proceedings (OSTI)

As negative pressure wave is applied to leak detection and location of natural gas pipeline, the key is how to realize accurate measurement of propagation velocity of pressure wave and time difference. However, there exists problem of lower accuracy ... Keywords: natural gas pipeline, leak detection and location, negative pressure wave, wavelet transform, singularity detection

Shuqing Zhang; Tianye Gao; Hong Xu; Guangpu Hao; Zhongdong Wang

2009-04-01T23:59:59.000Z

203

PHAST: Hardware-Accelerated Shortest Path Trees  

Science Conference Proceedings (OSTI)

We present a novel algorithm to solve the nonnegative single-source shortest path problem on road networks and other graphs with low highway dimension. After a quick preprocessing phase, we can compute all distances from a given source in the graph with ...

Daniel Delling; Andrew V. Goldberg; Andreas Nowatzyk; Renato F. Werneck

2011-05-01T23:59:59.000Z

204

VC-dimension and shortest path algorithms  

Science Conference Proceedings (OSTI)

We explore the relationship between VC-dimension and graph algorithm design. In particular, we show that set systems induced by sets of vertices on shortest paths have VC-dimension at most two. This allows us to use a result from learning theory to improve ...

Ittai Abraham; Daniel Delling; Amos Fiat; Andrew V. Goldberg; Renato F. Werneck

2011-07-01T23:59:59.000Z

205

Path specialization: reducing phased execution overheads  

Science Conference Proceedings (OSTI)

As garbage collected languages become widely used, the quest for reducing collection overheads becomes essential. In this paper, we propose a compiler optimization called path specialization that shrinks the cost of memory barriers for a wide ... Keywords: c#, garbage collection, memory management, read barriers, write barriers

Filip Pizlo; Erez Petrank; Bjarne Steensgaard

2008-06-01T23:59:59.000Z

206

Path selection in multi-layer networks  

Science Conference Proceedings (OSTI)

Multi-layer networks are computer networks where the configuration of the network can be changed dynamically at multiple layers. However, in practice, technologies at different layers may be incompatible to each other, which necessitates a careful choice ... Keywords: Multi-layer network, Network description, Path selection

Fernando Kuipers; Freek Dijkstra

2009-01-01T23:59:59.000Z

207

Current SPE Hydrodynamic Modeling and Path Forward  

SciTech Connect

Extensive work has been conducted on SPE analysis efforts: Fault effects Non-uniform weathered layer analysis MUNROU: material library incorporation, parallelization, and development of non-locking tets Development of a unique continuum-based-visco-plastic strain-rate-dependent material model With corrected SPE data path is now set for a multipronged approach to fully understand experimental series shot effects.

Knight, Earl E. [Los Alamos National Laboratory; Rougier, Esteban [Los Alamos National Laboratory

2012-08-14T23:59:59.000Z

208

Learning to improve path planning performance  

SciTech Connect

In robotics, path planning refers to finding a short. collision-free path from an initial robot configuration to a desired configuratioin. It has to be fast to support real-time task-level robot programming. Unfortunately, current planning techniques are still too slow to be effective, as they often require several minutes, if not hours of computation. To remedy this situation, we present and analyze a learning algorithm that uses past experience to increase future performance. The algorithm relies on an existing path planner to provide solutions to difficult tasks. From these solutions, an evolving sparse network of useful robot configurations is learned to support faster planning. More generally, the algorithm provides a speedup-learning framework in which a slow but capable planner may be improved both cost-wise and capability-wise by a faster but less capable planner coupled with experience. The basic algorithm is suitable for stationary environments, and can be extended to accommodate changing environments with on-demand experience repair and object-attached experience abstraction. To analyze the algorithm, we characterize the situations in which the adaptive planner is useful, provide quantitative bounds to predict its behavior, and confirm our theoretical results with experiments in path planning of manipulators. Our algorithm and analysis are sufficiently, general that they may also be applied to other planning domains in which experience is useful.

Chen, Pang C.

1995-04-01T23:59:59.000Z

209

Preliminary analysis of tank 241-C-106 dryout due to large postulated leak and vaporization  

SciTech Connect

This analysis assumes that there is a hypothetical large leak at the bottom of Tank 241-C-106 which initiates the dryout of the tank. The time required for a tank to dryout after a leak is of interest for safety reasons. As a tank dries out, its temperature is expected to increase which could affect the structural integrity of the concrete tank dome. Hence, it is of interest to know how fast and how high the temperature in a leaky tank increases, so that mitigation procedures can be planned and implemented in a timely manner. This analysis is focused on tank 241-C-106, which is known to be high thermal tank. The objective of the study was to determine how long it would take for tank 241-C-106 to reach 350 degrees Fahrenheit (about 177 degrees Centigrade) after a postulated large leak develops at the bottom center of the tank. The temperature of 350 degrees Fahrenheit is the minimum temperature that can cause structural damage to concrete (ACI 1992). The postulated leak at the bottom of the tank and the resulting dryout of the sludge in the tank make this analysis different from previous thermal analyses of the C-106 tank and other tanks, especially the double-shell tanks which are mostly liquid.

Piepho, M.G.

1994-12-01T23:59:59.000Z

210

Oil spill nears the beaches of Florida, and the leak may not be plugged before Christmas  

E-Print Network (OSTI)

Oil spill nears the beaches of Florida, and the leak may not be plugged before Christmas By David Gardner Last updated at 11:32 AM on 3rd June 2010 BP's giant oil slick was bearing down on Florida holidaymakers a year visit Florida and state leaders fear the oil will devastate a tourist industry

Belogay, Eugene A.

211

Tank 241-AY-102 Leak Assessment Supporting Documentation: Miscellaneous Reports, Letters, Memoranda, And Data  

SciTech Connect

This report contains reference materials cited in RPP-ASMT -53793, Tank 241-AY-102 Leak Assessment Report, that were obtained from the National Archives Federal Records Repository in Seattle, Washington, or from other sources including the Hanford Site's Integrated Data Management System database (IDMS).

Engeman, J. K.; Girardot, C. L.; Harlow, D. G.; Rosenkrance, C. L.

2012-12-20T23:59:59.000Z

212

Application of the Leak-Before-Break Approach to BWR Piping  

Science Conference Proceedings (OSTI)

By applying the leak-before-break approach in BWR safety evaluations, utilities can justify eliminating many pipe whip restraints and jet impingement shields. The report details a sample analysis of recirculation piping in a General Electric BWR and offers a procedure for ranking plant piping systems for analysis.

1987-01-07T23:59:59.000Z

213

Leaking electricity: Standby and off-mode power consumption in consumer electronics and household appliances  

Science Conference Proceedings (OSTI)

This report assesses ``leaking`` electricity from consumer electronics and small household appliances when they are in standby mode or turned off, and examines the impacts of these losses. The report identifies trends in relevant product industries and gives technical and policy options for reducing standby and off-mode power loss.

Thorne, J.; Suozzo, M.

1998-12-31T23:59:59.000Z

214

In Shop Acceptance Test Report for the SY Farm Annulus Leak Detectors  

SciTech Connect

The following test report was written for the SY tank farm annulus leak detectors. The test plan used was HNF-4546, Revision 1. The purpose of the test plan was to test the ENRAF series 854 ATG with SPU II card prior to installation. The test plan set various parameters and verifies the gauge and alarms functionality.

SMITH, S.G.

1999-12-07T23:59:59.000Z

215

FIFTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton{reg_sign} GLT O-rings used in the Model 9975 package has been ongoing for six years at the Savannah River National Laboratory. Sixty-seven mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 F. They were leak-tested initially and have been tested at nominal six month intervals to determine if they meet the criterion of leaktightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 F. High temperature aging continues for 36 GLT O-ring fixtures at 200-350 F. Room temperature leak test failures have been experienced in 6 of the GLT O-ring fixtures aging at 300 and 350 F, and in all 3 of the GLT O-ring fixtures aging at higher temperatures. No failures have yet been observed in GLT O-ring fixtures aging at 200 F for 30-48 months, which is still bounding to O-ring temperatures during storage in KAMS. High temperature aging continues for 6 GLT-S O-ring fixtures at 200-300 F. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 F. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 or 300 F for 19 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the Orings displayed a compression set ranging from 51-95%. This is significantly greater than seen to date for packages inspected during KAMS field surveillance (23% average). For GLT O-rings, service life based on the room temperature leak rate criterion is comparable to that predicted by compression stress relaxation (CSR) data at higher temperatures (350-400 F). While there are no comparable failure data yet at aging temperatures below 300 F, extrapolations of the data for GLT O-rings suggests the CSR model predictions provide a conservative prediction of service life relative to the leak rate criterion. Failure data at lower temperatures are needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining fixtures.

Daugherty, W.; Hoffman, E.

2011-04-11T23:59:59.000Z

216

FIFTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

Science Conference Proceedings (OSTI)

A series of experiments to monitor the aging performance of Viton{sup reg.} GLT O-rings used in the Model 9975 package has been ongoing for six years at the Savannah River National Laboratory. Sixty-seven mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 F. They were leak-tested initially and have been tested at nominal six month intervals to determine if they meet the criterion of leaktightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 F. High temperature aging continues for 36 GLT O-ring fixtures at 200--350 F. Room temperature leak test failures have been experienced in 5 of the GLT O-ring fixtures aging at 300 and 350 F, and in all 3 of the GLT O-ring fixtures aging at higher temperatures. No failures have yet been observed in GLT O-ring fixtures aging at 200 F for 30--48 months, which is still bounding to O-ring temperatures during storage in KAMS. High temperature aging continues for 6 GLT-S O-ring fixtures at 200--300 F. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 F. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 or 300 F for 19 months. For O-ring fixtures that have failed the room temperature leak test and been disassembled, the O-rings displayed a compression set ranging from 51--95%. This is significantly greater than seen to date for packages inspected during KAMS field surveillance (23% average). For GLT O-rings, service life based on the room temperature leak rate criterion is comparable to that predicted by compression stress relaxation (CSR) data at higher temperatures (350--400 F). While there are no comparable failure data yet at aging temperatures below 300 F, extrapolations of the data for GLT O-rings suggests that CSR model predictions provide a conservative prediction of service life relative to the leak rate criterion. Failure data at lower temperatures is needed to verify this apparent trend. Insufficient failure data exist currently to perform a similar comparison for GLT-S O-rings. Aging and periodic leak testing will continue for the remaining fixtures.

Daugherty, W.; Hoffman, E.

2010-11-01T23:59:59.000Z

217

A Potential Path to Emissions-Free Fossil EnergyA Potential Path...  

NLE Websites -- All DOE Office Websites (Extended Search)

3 A Potential Path to Emissions-Free Fossil Energy The National Energy Technology Laboratory's chemical looping reactor, above, is the only one of its kind in the Western...

218

Model based detection of hydrogen leaks in a fuel cell stack Ari Ingimundarson and Anna G. Stefanopoulou and Denise McKay  

E-Print Network (OSTI)

will depend on the composition of the gas where the leak takes place. Two approaches are presented here but takes into account the natural leak of the stack and humidity. Hydrogen leak detection without using. Hydrogen has the lowest molecular weight and viscosity of any gas. Its properties make it have a faster

Stefanopoulou, Anna

219

The path forward: Monte Carlo Convergence discussion  

SciTech Connect

This is a summary of 'the path forward' discussion session of the NuInt09 workshop which focused on Monte Carlo event generators. The main questions raised as part of this discussion are: how to make Monte Carlo generators more reliable and how important it is to work on a universal Monte Carlo generator of events? In this contribution, several experts in the field summarize their views, as presented at the workshop.

Andreopoulos, Costas [Rutherford Appleton Laboratory, STFC Oxfordshire OX11 0QX (United Kingdom); Gallagher, Hugh [Tufts University, Medford, Massachusetts (United States); Hayato, Yoshinari [Kamioka Observatory, ICRR, University of Tokyo Higashi-Mozumi 456, Kamioka-cho, Hida-city Gifu 506-1205 (Japan); Sobczyk, Jan T. [Institute of Theoretical Physics, Wroclaw, University Poland (Poland); Walter, Chris [Department of Physics, Duke University, Durham, NC 27708 (United States); Zeller, Sam [Los Alamos National Laboratory, Los Alamos, NM (United States)

2009-11-25T23:59:59.000Z

220

Free Energy Changes, Fluctuations, and Path Probabilities  

E-Print Network (OSTI)

We illustrate some of the static and dynamic relations discovered by Cohen, Crooks, Evans, Jarzynski, Kirkwood, Morriss, Searles, and Zwanzig. These relations link nonequilibrium processes to equilibrium isothermal free energy changes and to dynamical path probabilities. We include ideas suggested by Dellago, Geissler, Oberhofer, and Schoell-Paschinger. Our treatment is intended to be pedagogical, for use in an updated version of our book: Time Reversibility, Computer Simulation, and Chaos. Comments are very welcome.

William G. Hoover; Carol G. Hoover

2011-04-20T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Automatic tool path generation for finish machining  

SciTech Connect

A system for automatic tool path generation was developed at Sandia National Laboratories for finish machining operations. The system consists of a commercially available 5-axis milling machine controlled by Sandia developed software. This system was used to remove overspray on cast turbine blades. A laser-based, structured-light sensor, mounted on a tool holder, is used to collect 3D data points around the surface of the turbine blade. Using the digitized model of the blade, a tool path is generated which will drive a 0.375 inch diameter CBN grinding pin around the tip of the blade. A fuzzified digital filter was developed to properly eliminate false sensor readings caused by burrs, holes and overspray. The digital filter was found to successfully generate the correct tool path for a blade with intentionally scanned holes and defects. The fuzzified filter improved the computation efficiency by a factor of 25. For application to general parts, an adaptive scanning algorithm was developed and presented with simulation results. A right pyramid and an ellipsoid were scanned successfully with the adaptive algorithm.

Kwok, Kwan S.; Loucks, C.S.; Driessen, B.J.

1997-03-01T23:59:59.000Z

222

Experimental and numerical investigation of phonon mean free path distribution  

E-Print Network (OSTI)

Knowledge of phonon mean free path (MFP) distribution is critically important to engineering size effects. Phenomenological models of phonon relaxation times can give us some sense about the mean free path distribution, ...

Zeng, Lingping

2013-01-01T23:59:59.000Z

223

Terminal area flight path generation using parallel constraint propagation  

E-Print Network (OSTI)

A Flight Path Generator is defined as the module of an automated Air Traffic Control system which plans aircraft trajectories in the terminal area with respect to operational constraints. The flight path plans have to be ...

Sadoune, Michel

1989-01-01T23:59:59.000Z

224

China Energy and Emissions Paths to 2030 (2nd Edition)  

NLE Websites -- All DOE Office Websites (Extended Search)

China Energy and Emissions Paths to 2030 (2nd Edition) Title China Energy and Emissions Paths to 2030 (2nd Edition) Publication Type Report Year of Publication 2012 Authors...

225

A Potential Path to Emissions-Free Fossil Energy | Department...  

NLE Websites -- All DOE Office Websites (Extended Search)

A Potential Path to Emissions-Free Fossil Energy A Potential Path to Emissions-Free Fossil Energy August 20, 2013 - 10:00am Addthis The National Energy Technology Laboratory's...

226

A secure alternate path routing in sensor networks  

Science Conference Proceedings (OSTI)

This paper presents a secure alternate path routing in sensor networks. Our alternate path scheme makes the routing protocol resilient in the presence of malicious nodes that launch selective forwarding attacks. SeRINS (a Secure alternate path Routing ... Keywords: Secure routing, Sensor network security

Suk-Bok Lee; Yoon-Hwa Choi

2006-12-01T23:59:59.000Z

227

Nuclear Maintenance Applications Center: On-Line Leak Sealing: A Guide for Nuclear Power Plant Maintenance Personnel (Update of NP-6 523-D)  

Science Conference Proceedings (OSTI)

On-line leak sealing consists of repairing a leak or potential leak while the plant is operating. A pre-engineered fixture or part of the component itself is used to form a cavity that will contain the leak source. The fixture design includes a means of injecting the sealant using a shutoff adapter. The injection equipment is attached to the adaptor, and sealant is injected either directly into the cavity or into a peripheral seal to seal the leak. Although the methodology has been in existence for 45 ye...

2011-06-29T23:59:59.000Z

228

Is the situation and immediate threat to life and health? Spill/Leak/Release Medical Emergency Fire or Flammable Gas Spill/Leak/Release Medical Emergency Fire or Flammable Gas Chemical Odor? Possible Fire / Natural Gas  

E-Print Network (OSTI)

? Possible Fire / Natural Gas (including chemicals and bio agents") (not including chemicals or bio agents Fire or Flammable Gas Spill/Leak/Release Medical Emergency Fire or Flammable Gas Chemical Odor

229

ENVIRONMENTAL MONITORING OF LEAKS USING TIME LAPSED LONG ELECTRODE ELECTRICAL RESISTIVITY  

Science Conference Proceedings (OSTI)

Highly industrialized areas pose challenges for surface electrical resistivity characterization due to metallic infrastructure. The infrastructure is typically more conductive than the desired targets and will mask the deeper subsurface information. These challenges may be minimized if steel-cased wells are used as long electrodes in the area near the target. We demonstrate a method of using long electrodes to electrically monitor a simulated leak from an underground storage tank with both synthetic examples and a field demonstration. The synthetic examples place a simple target of varying electrical properties beneath a very low resistivity layer. The layer is meant to replicate the effects of infrastructure. Both surface and long electrodes are tested on the synthetic domain. The leak demonstration for the field experiment is simulated by injecting a high conductivity fluid in a perforated well within the S tank farm at Hanford, and the resistivity measurements are made before and after the leak test. All data are processed in four dimensions, where a regularization procedure is applied in both the time and space domains. The synthetic test case shows that the long electrode ERM could detect relative changes in resistivity that are commensurate with the differing target properties. The surface electrodes, on the other hand, had a more difficult time matching the original target's footprint. The field results shows a lowered resistivity feature develop south of the injection site after cessation of the injections. The time lapsed regularization parameter has a strong influence on the differences in inverted resistivity between the pre and post injection datasets, but the interpretation of the target is consistent across all values of the parameter. The long electrode ERM method may provide a tool for near real-time monitoring of leaking underground storage tanks.

MYERS DA; RUCKER DF; FINK JB; LOKE MH

2009-12-16T23:59:59.000Z

230

Networks in Buildings: Which Path Forward?  

NLE Websites -- All DOE Office Websites (Extended Search)

Networks in Buildings: Which Path Forward? Networks in Buildings: Which Path Forward? Title Networks in Buildings: Which Path Forward? Publication Type Conference Paper LBNL Report Number LBNL-2511E Year of Publication 2008 Authors Nordman, Bruce Conference Name 2008 ACEEE Summer Study on Energy Efficiency in Buildings Conference Location Pacific Grove, CA Keywords communication and standards, technologies Abstract To date, digital networks have principally been installed for connecting information technology devices, with more modest use in consumer electronics, security, and large building control systems. The next 20 years will see much greater deployment of networks in buildings of all types, and across all end uses. Most of these are likely to be introduced primarily for reasons other than energy efficiency, and add energy use for network interfaces and network products. Widespread networking could easily lead to increased energy use, and experience with IT and CE networks suggests this may be likely. Active engagement by energy efficiency professionals in the architecture and design of future networks could lead to their being a large and highly cost-effective tool for efficiency. However, network standards are complex and take many years to develop and negotiate so that lack of action on this in the near term may foreclose important opportunities for years or decades to come. Digital networks need to be common globally, providing another challenge to building systems and elements that are more commonly designed only for national or regional markets. Key future networks are lighting, climate control, and security/presence. This paper reviews some examples of past network designs and use and the lessons they hold for future building networks. It also highlights key needed areas for research, policy, and standards development.

231

CHARACTERIZATION OF LEAK PATHWAYS IN THE BELOW GRADE DUCTS OF THE BROOKHAVEN GRAPHITE RESEARCH REACTOR USING PERFLUOROCARBON TRACERS.  

SciTech Connect

The focus of this program was the characterization of the soils beneath the main air ducts connecting the exhaust plenums with the Fan House. The air plenums experienced water intrusion during BGRR operations and after shutdown. The water intrusions were attributed to rainwater leaks into degraded parts of the system and to internal cooling water system leaks. As part of the overall characterization efforts, a state-of-the-art gaseous perfluorocarbon tracer technology was utilized to characterize leak pathways from the ducts. This in turn suggests what soil regions under or adjacent to the ductwork should be emphasized in the characterization process. Knowledge of where gaseous tracers leak from the ducts yields a conservative picture of where water transport, out of or into, the ducts might have occurred.

HEISER,J.; SULLIVAN,T.; KALB,P.; MILIAN,L.; WILKE,R.; NEWSON,C.; LILIMPAKIS,M.

2001-04-01T23:59:59.000Z

232

Discovery of the First Leaking Double-Shell Tank - Hanford Tank 241-AY-102-14222  

SciTech Connect

A routine video inspection of the annulus space between the primary tank and secondary liner of double-shell tank 241-AY-102 was performed in August 2012. During the inspection, unexpected material was discovered. A subsequent video inspection revealed additional unexpected material on the opposite side of the tank, none of which had been observed during inspections performed in December 2006 and January 2007. A formal leak assessment team was established to review the tank's construction and operating histories, and preparations for sampling and analysis began to determine the material's origin. A new sampling device was required to collect material from locations that were inaccessible to the available sampler. Following its design and fabrication, a mock-up test was performed for the new sampling tool to ensure its functionality and capability of performing the required tasks. Within three months of the discovery of the unexpected material, sampling tools were deployed, material was collected, and analyses were performed. Results indicated that some of the unknown material was indicative of soil, whereas the remainder was consistent with tank waste. This, along with the analyses performed by the leak assessment team on the tank's construction history, lead to the conclusion that the primary tank was leaking into the annulus. Several issues were encountered during the deployment of the samplers into the annulus. As this was the first time samples had been required from the annulus of a double-shell tank, a formal lessons learned was created concerning designing equipment for unique purposes under time constraints.

Harrington, Stephanie J.; Sams, Terry L.

2013-11-06T23:59:59.000Z

233

Turbine Steam Path Damage: Theory and Practice  

Science Conference Proceedings (OSTI)

Historically, most treatises about steam turbines have concentrated on thermo-dynamics or design. In contrast, the primary focus of this book is on the problems that occur in the turbine steam path. Some of these problems have been long known to the industry, starting as early as A. Stodola's work at the turn of the century in which mechanisms such as solid particle erosion, corrosion and liquid droplet damage were recognized. What we have tried to do here is to provide, in a single, comprehensive refere...

1999-08-18T23:59:59.000Z

234

The Path to Magnetic Fusion Energy  

Science Conference Proceedings (OSTI)

When the possibility of fusion as an energy source for electricity generation was realized in the 1950s, understanding of the plasma state was primitive. The fusion goal has been paced by, and has stimulated, the development of plasma physics. Our understanding of complex, nonlinear processes in plasmas is now mature. We can routinely produce and manipulate 100 million degree plasmas with remarkable finesse, and we can identify a path to commercial fusion power. The international experiment, ITER, will create a burning (self-sustained) plasma and produce 500 MW of thermal fusion power. This talk will summarize the progress in fusion research to date, and the remaining steps to fusion power.

Prager, Stewart (PPPL)

2011-05-04T23:59:59.000Z

235

Networks in Buildings: Which Path Forward?  

NLE Websites -- All DOE Office Websites (Extended Search)

1E 1E Networks in Buildings: Which Path Forward? B. Nordman Environmental Energy Technologies Division August 2008 Presented at the 2008 ACEEE Summer Study on Energy Efficiency in Buildings Pacific Grove, CA, August 17-22, 2008, and published in the Proceedings DISCLAIMER This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes

236

EIGHTH INTERIM STATUS REPORT: MODEL 9975 PCV O-RING FIXTURE LONG-TERM LEAK PERFORMANCE  

SciTech Connect

A series of experiments to monitor the aging performance of Viton® GLT O-rings used in the Model 9975 package has been ongoing since 2004 at the Savannah River National Laboratory. Seventy tests using mock-ups of 9975 Primary Containment Vessels (PCVs) were assembled and heated to temperatures ranging from 200 to 450 ºF. They were leak-tested initially and have been tested periodically to determine if they meet the criterion of leak-tightness defined in ANSI standard N14.5-97. Fourteen additional tests were initiated in 2008 with GLT-S O-rings heated to temperatures ranging from 200 to 400 ºF. High temperature aging continues for 23 GLT O-ring fixtures at 200 – 270 ºF. Room temperature leak test failures have been experienced in all of the GLT O-ring fixtures aging at 350 ºF and higher temperatures, and in 8 fixtures aging at 300 ºF. The remaining GLT O-ring fixtures aging at 300 ºF have been retired from testing following more than 5 years at temperature without failure. No failures have yet been observed in GLT O-ring fixtures aging at 200 ºF for 61 - 85 months, which is still bounding to O-ring temperatures during storage in KArea Complex (KAC). Based on expectations that the fixtures aging at 200 ºF will remain leaktight for a significant period yet to come, 2 additional fixtures began aging in 2011 at an intermediate temperature of 270 ºF, with hopes that they may reach a failure condition before the 200 ºF fixtures. High temperature aging continues for 6 GLT-S O-ring fixtures at 200 – 300 ºF. Room temperature leak test failures have been experienced in all 8 of the GLT-S O-ring fixtures aging at 350 and 400 ºF. No failures have yet been observed in GLT-S O-ring fixtures aging at 200 - 300 ºF for 41 - 45 months. Aging and periodic leak testing will continue for the remaining PCV fixtures.

Daugherty, W. L.

2013-09-03T23:59:59.000Z

237

A Development Path for the Stabilized Spheromak  

SciTech Connect

In Refs. [1] - [3], I suggest a concerted computational effort to study profile control of spheromaks, in anticipation that it is timely to incorporate the q < 1 regime of RFP's and spheromaks into an integrated advanced toroidal confinement program, together with improvements in tokamaks and stellarators now being pursued. For profile control of spheromaks by neutral beam injection, with care to avoid super-Alfvenic beam instability the main issue is excitation of tearing modes that can be studied using the NIMROD code already calibrated to MST and SSPX. In this note, I show that profile control on spheromaks could be demonstrated in a device the size of SSPX, leading ultimately to a very compact ignition facility, and possibly modular fusion reactors with a shorter development path.

Fowler, T K

2007-07-13T23:59:59.000Z

238

A Development Path for the Stabilized Spheromak  

SciTech Connect

In Refs. [1] - [3], I suggest a concerted computational effort to study profile control of spheromaks, in anticipation that it is timely to incorporate the q < 1 regime of RFP's and spheromaks into an integrated advanced toroidal confinement program, together with improvements in tokamaks and stellarators now being pursued. For profile control of spheromaks by neutral beam injection, with care to avoid super-Alfvenic beam instability the main issue is excitation of tearing modes that can be studied using the NIMROD code already calibrated to MST and SSPX. In this note, I show that profile control on spheromaks could be demonstrated in a device the size of SSPX, leading ultimately to a very compact ignition facility, and possibly modular fusion reactors with a shorter development path.

Fowler, T K

2007-07-13T23:59:59.000Z

239

Joint Spectral Radius and Path-Complete Graph Lyapunov Functions  

E-Print Network (OSTI)

Nov 22, 2011 ... Abstract: We introduce the framework of path-complete graph Lyapunov functions for approximation of the joint spectral radius. The approach is ...

240

3D Nanostructured Bicontinuous Electrodes: Path to Ultra-High ...  

Science Conference Proceedings (OSTI)

3D Nanostructured Bicontinuous Electrodes: Path to Ultra-High Power and Energy ... High Energy Density Lithium Capacitors Using Carbon-Carbon Electrodes.

Note: This page contains sample records for the topic "lpf leak path" 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

Modulated Tool-Path (MTP) Chip Breaking System  

Relationship between chip length, oscillation rate, and R Af . Modulated Tool-Path (MTP) Chip Breaking System 16 Fig. 11. MTP chip breaking surface fi nish model.

242

DOE EM Landfill Workshop and Path Forward - July 2009  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Teleconference: 2. DOE EM Landfill Workshop & Path Forward Office of Groundwater and Soil Remediation US Department of Energy July 2009 Slides prepared by CRESP DOE EM Landfill...

243

Community-Based Forest (Natural) Resource Management: A Path...  

Open Energy Info (EERE)

Based Forest (Natural) Resource Management: A Path to Sustainable Environment and Development Jump to: navigation, search Name Community-Based Forest (Natural) Resource Management:...

244

Determining Cloud Ice Water Path from High-Frequency Microwave...  

NLE Websites -- All DOE Office Websites (Extended Search)

Determining Cloud Ice Water Path from High-Frequency Microwave Measurements G. Liu Department of Meteorology Florida State University Tallahassee, Florida Introduction A better...

245

EIA updates mapping tool relating hurricane path to energy ...  

U.S. Energy Information Administration (EIA)

capacity; nuclear; exports ... The Energy Information Administration has updated an interactive mapping tool on its website so that users see the projected path of ...

246

Efficient Tool Paths and Part Orientation for Face Milling  

E-Print Network (OSTI)

Avoiding Tool Exit in Planar Milling by Adjusting Width oftime. The most common face milling tool paths employed areand Part Orientation for Face Milling A. Rangarajan 1 , D.

Rangarajan, Arvind; Dornfeld, David

2004-01-01T23:59:59.000Z

247

AUTOMATIC TUNING OF GRASP WITH PATH-RELINKING ...  

E-Print Network (OSTI)

Feb 16, 2010 ... double facility-to-location moves sampled. Procedure PathRelinking takes as input 8 user-defined parameters that deter- mine, among many ...

248

A Mixed Integer Nonlinear Programming Framework for Fixed Path ...  

E-Print Network (OSTI)

paths of the robots are represented by piecewise cubic spline curves. ...... programming, linear and nonlinear systems theory, statistics, and machine learning.

249

ORNL-grown oxygen 'sponge' presents path to better catalysts...  

NLE Websites -- All DOE Office Websites (Extended Search)

presents path to better catalysts, energy materials This schematic depicts a new ORNL-developed material that can easily absorb or shed oxygen atoms. This schematic depicts...

250

Scalable clustering of Internet paths by shared congestion  

E-Print Network (OSTI)

Abstract — Internet paths sharing the same bottleneck can be identified using several shared congestion detection techniques. However, all of these techniques have been designed to detect shared congestion between a pair of paths. To cluster N paths by shared congestion, a straightforward approach of using pairwise tests would require O(N 2) time complexity. In this paper, we present a scalable approach to cluster Internet paths based on DCW (Delay Correlation with Wavelet denoising) which does not require a common end point between paths. We present a function to map each path’s measurement data into a point in a multidimensional space such that points are close to each other if and only if the corresponding paths share congestion. Because points in the space are indexed using a tree-like structure, the computational complexity of clustering N paths can be reduced to O(N log N). The indexing overhead can be further improved by reducing dimensionality of the space through wavelet transform. Computation cost is kept low by reusing for dimensionality reduction the same wavelet coefficients obtained in DCW. Our approach is evaluated by simulations and found to be effective for a large N. The tradeoff between dimensionality and clustering accuracy is shown empirically. I.

Min Sik Kim; Taekhyun Kim; Yong-june Shin; Simon S. Lam; Edward J. Powers

2006-01-01T23:59:59.000Z

251

Leaking method approach to surface transport in the Mediterranean Sea from a numerical ocean model  

E-Print Network (OSTI)

We use Lagrangian diagnostics (the leaking and the exchange methods) to characterize surface transport out of and between selected regions in the Western Mediterranean. Velocity fields are obtained from a numerical model. Residence times of water of Atlantic origin in the Algerian basin, with a strong seasonal dependence, are calculated. Exchange rates between these waters and the ones occupying the northern basin are also evaluated. At surface, northward transport is dominant, and involves filamental features and eddy structures that can be identified with the Algerian eddies. The impact on these results of the presence of small scale turbulent motions is evaluated by adding Lagrangian diffusion.

Judit Schneider; Vicente Fernandez; Emilio Hernandez-Garcia

2004-10-01T23:59:59.000Z

252

Hanford spent nuclear fuel project recommended path forward, volume III: Alternatives and path forward evaluation supporting documentation  

SciTech Connect

Volume I of the Hanford Spent Nuclear Fuel Project - Recommended Path Forward constitutes an aggressive series of projects to construct and operate systems and facilities to safely retrieve, package, transport, process, and store K Basins fuel and sludge. Volume II provided a comparative evaluation of four Alternatives for the Path Forward and an evaluation for the Recommended Path Forward. Although Volume II contained extensive appendices, six supporting documents have been compiled in Volume III to provide additional background for Volume II.

Fulton, J.C.

1994-10-01T23:59:59.000Z

253

Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques  

DOE Patents (OSTI)

Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid though the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution. 6 figs.

Daily, W.D.; Laine, D.L.; Laine, E.F.

1997-08-26T23:59:59.000Z

254

Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques  

DOE Patents (OSTI)

Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner or between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid through the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution.

Daily, William D. (Livermore, CA); Laine, Daren L. (San Anotonio, TX); Laine, Edwin F. (Penn Valley, CA)

2001-01-01T23:59:59.000Z

255

Methods for detecting and locating leaks in containment facilities using electrical potential data and electrical resistance tomographic imaging techniques  

DOE Patents (OSTI)

Methods are provided for detecting and locating leaks in liners used as barriers in the construction of landfills, surface impoundments, water reservoirs, tanks, and the like. Electrodes are placed in the ground around the periphery of the facility, in the leak detection zone located between two liners if present, and/or within the containment facility. Electrical resistivity data is collected using these electrodes. This data is used to map the electrical resistivity distribution beneath the containment liner between two liners in a double-lined facility. In an alternative embodiment, an electrode placed within the lined facility is driven to an electrical potential with respect to another electrode placed at a distance from the lined facility (mise-a-la-masse). Voltage differences are then measured between various combinations of additional electrodes placed in the soil on the periphery of the facility, the leak detection zone, or within the facility. A leak of liquid though the liner material will result in an electrical potential distribution that can be measured at the electrodes. The leak position is located by determining the coordinates of an electrical current source pole that best fits the measured potentials with the constraints of the known or assumed resistivity distribution.

Daily, William D. (Livermore, CA); Laine, Daren L. (San Antonio, TX); Laine, Edwin F. (Alamo, CA)

1997-01-01T23:59:59.000Z

256

Exact graph search algorithms for generalized traveling salesman path problems  

Science Conference Proceedings (OSTI)

The Generalized Traveling Salesman Path Problem (GTSPP) involves finding the shortest path from a location s to a location t that passes through at least one location from each of a set of generalized location categories (e.g., gas stations, ...

Michael N. Rice; Vassilis J. Tsotras

2012-06-01T23:59:59.000Z

257

A constrained binary knapsack approximation for shortest path network interdiction  

Science Conference Proceedings (OSTI)

A modified shortest path network interdiction model is approximated in this work by a constrained binary knapsack which uses aggregated arc maximum flow as the objective function coefficient. In the modified shortest path network interdiction problem, ... Keywords: Approximation techniques, Homeland security, Integer programming, Network interdiction

Justin Yates; Kavitha Lakshmanan

2011-11-01T23:59:59.000Z

258

A path space extension for robust light transport simulation  

Science Conference Proceedings (OSTI)

We present a new sampling space for light transport paths that makes it possible to describe Monte Carlo path integration and photon density estimation in the same framework. A key contribution of our paper is the introduction of vertex perturbations, ... Keywords: global illumination, multiple importance sampling

Toshiya Hachisuka; Jacopo Pantaleoni; Henrik Wann Jensen

2012-11-01T23:59:59.000Z

259

Vickrey Prices and Shortest Paths: What is an Edge Worth?  

Science Conference Proceedings (OSTI)

We solve a shortest path problem that is motivated by recent interest in pricing networks or other computational resources. Informally, how much is an edge in a network worth to a user who wants to send data between two nodes along a shortest path? If ...

J. Hershberger; S. Suri

2001-10-01T23:59:59.000Z

260

Integrative path planning and motion control for handling large components  

Science Conference Proceedings (OSTI)

For handling large components a large workspace and high precision are required. In order to simplify the path planning for automated handling systems, this task can be divided into global, regional and local motions. Accordingly, different types of ... Keywords: integrative production, motion control, path planning, robotic assembly application

Rainer Müller; Martin Esser; Markus Janssen

2011-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Realization strategies of dedicated path protection: A bandwidth cost perspective  

Science Conference Proceedings (OSTI)

Communication networks have to provide a high level of availability and instantaneous recovery after failures in order to ensure sufficient survivability for mission-critical services. Currently, dedicated path protection (or 1+1) is implemented in backbone ... Keywords: Cost analysis, Dedicated protection, Network coding, Path protection, Reliability, SRLG

PéTer Babarczi, Gergely BiczóK, Harald ØVerby, JáNos Tapolcai, PéTer Soproni

2013-06-01T23:59:59.000Z

262

MultiPath TCP: from theory to practice  

Science Conference Proceedings (OSTI)

The IETF is developing a new transport layer solution, MultiPath TCP (MPTCP), which allows to efficiently exploit several Internet paths between a pair of hosts, while presenting a single TCP connection to the application layer. From an implementation ... Keywords: TCP, implementation, measurements, multipath

Sébastien Barré; Christoph Paasch; Olivier Bonaventure

2011-05-01T23:59:59.000Z

263

Overhead reduction in a distributed path management system  

Science Conference Proceedings (OSTI)

CEAS (cross entropy ant system) is a distributed, robust and adaptive swarm intelligence system for path management in communication networks. This paper focuses on strategies for handling the overhead in terms of processing cycles, memory storage, and ... Keywords: Cross entropy, Path management, Swarm intelligence

Poul E. Heegaard; Otto J. Wittner

2010-04-01T23:59:59.000Z

264

Helium leak testing of a radioactive contaminated vessel under high pressure in a contaminated environment  

Science Conference Proceedings (OSTI)

At ANL-W, with the shutdown of EBR-II, R&D has evolved from advanced reactor design to the safe handling, processing, packaging, and transporting spent nuclear fuel and nuclear waste. New methods of processing spent fuel rods and transforming contaminated material into acceptable waste forms are now in development. Storage of nuclear waste is a high interest item. ANL-W is participating in research of safe storage of nuclear waste, with the WIPP (Waste Isolation Pilot Plant) site in New Mexico the repository. The vessel under test simulates gas generated by contaminated materials stored underground at the WIPP site. The test vessel is 90% filled with a mixture of contaminated material and salt brine (from WIPP site) and pressurized with N2-1% He at 2500 psia. Test acceptance criteria is leakage jar method is used to determine leakage rate using a mass spectrometer leak detector (MSLD). The efficient MSLD and an Al bell jar replaced a costly, time consuming pressure decay test setup. Misinterpretation of test criterion data caused lengthy delays, resulting in the development of a unique procedure. Reevaluation of the initial intent of the test criteria resulted in leak tolerances being corrected and test efficiency improved.

Winter, M.E.

1996-10-01T23:59:59.000Z

265

Helium leak testing of a radioactive contaminated vessel under high pressure in a contaminated environment  

SciTech Connect

At ANL-W, with the shutdown of EBR-II, R&D has evolved from advanced reactor design to the safe handling, processing, packaging, and transporting spent nuclear fuel and nuclear waste. New methods of processing spent fuel rods and transforming contaminated material into acceptable waste forms are now in development. Storage of nuclear waste is a high interest item. ANL-W is participating in research of safe storage of nuclear waste, with the WIPP (Waste Isolation Pilot Plant) site in New Mexico the repository. The vessel under test simulates gas generated by contaminated materials stored underground at the WIPP site. The test vessel is 90% filled with a mixture of contaminated material and salt brine (from WIPP site) and pressurized with N2-1% He at 2500 psia. Test acceptance criteria is leakage < 10{sup -7} cc/seconds at 2500 psia. The bell jar method is used to determine leakage rate using a mass spectrometer leak detector (MSLD). The efficient MSLD and an Al bell jar replaced a costly, time consuming pressure decay test setup. Misinterpretation of test criterion data caused lengthy delays, resulting in the development of a unique procedure. Reevaluation of the initial intent of the test criteria resulted in leak tolerances being corrected and test efficiency improved.

Winter, M.E.

1996-10-01T23:59:59.000Z

266

Proceedings of the seminar on leak before break in reactor piping and vessels  

SciTech Connect

The objective of the seminar was to present the current state of the art in Leak-Before-Break (LBB) methodology development, validation, and application in an international forum. With particular emphasis on industrial applications and regulatory policies, the seminar provided an opportunity to compare approaches, experiences, and codifications developed by different countries. The seminar was organized into four topic areas: status of LBB applications; technical issues in LBB methodology; complementary requirements (leak detection and inspection); LBB assessment and margins. As a result of this seminar, an improved understanding of LBB gained through sharing of different viewpoints from different countries, permits consideration of: simplified pipe support design and possible elimination of loss-of-coolant-accident (LOCA) mechanical consequences for specific cases; defense-in-depth type of applications without support modifications; support of safety cases for plants designed without the LOCA hypothesis. In support of these activities, better estimates of the limits to the LBB approach should follow, as well as an improvement in codifying methodologies. Selected papers are indexed separately for inclusion in the Energy Science and Technology Database.

Faidy, C. [ed.] [Electricite de France, Villeurbanne (France); Gilles, P. [ed.] [Framatome, Paris (France)

1997-04-01T23:59:59.000Z

267

A Path to Collaborative Strategic Learning  

SciTech Connect

Collaborative learning is critical for the future of any organization and must align with the strategic organizational processes that result in products valued by others. To discover these processes, proposal preparation is explored using topic-oriented ethnography, grounded theory, and an innovative addition to qualitative interviewing, called metainquiry. Using interview data from editors, graphic artists, text processors, scientists, engineers, and technical managers, substantive theory emerges. The research discovers the five essential processes of owning, visioning, reviewing, producing, and contributing needed for organizational strategic learning to occur. The dimensions of these processes are made explicit and can be used to gauge the health of any organization. The substantive theory also provides insight into the ability of collaborative learning to evolve, flourish, and adapt to the strategic advantage of the organization. Lastly, actionable goals with ten essential elements emerge that link owning, visioning, reviewing, producing, and contributing as a path for all organizations to follow to promote collaborative learning communities and enhance their competitive advantage.

Nancy M. Carlson

2003-10-01T23:59:59.000Z

268

Solar Decathlon 2013 Infographic: The Path to a Brighter Future |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Infographic: The Path to a Brighter Future Infographic: The Path to a Brighter Future Solar Decathlon 2013 Infographic: The Path to a Brighter Future September 13, 2013 - 11:50am Addthis Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year’s competition and highlights innovative design features in each of the teams’ houses. Not featured in the "Meet the Teams" section, Team Texas will also compete at Solar Decathlon 2013 with their ADAPT house. | Infographic by Sarah Gerrity, Energy Department. Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year's competition and highlights innovative design features in each of the teams' houses.

269

Solar Decathlon 2013 Infographic: The Path to a Brighter Future |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Solar Decathlon 2013 Infographic: The Path to a Brighter Future Solar Decathlon 2013 Infographic: The Path to a Brighter Future Solar Decathlon 2013 Infographic: The Path to a Brighter Future September 13, 2013 - 11:50am Addthis Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year’s competition and highlights innovative design features in each of the teams’ houses. Not featured in the "Meet the Teams" section, Team Texas will also compete at Solar Decathlon 2013 with their ADAPT house. | Infographic by Sarah Gerrity, Energy Department. Our latest infographic -- Solar Decathlon 2013: The Path to a Brighter Future -- takes a look at the teams competing in this year's competition

270

Simple catalytic cell for restoring He leak detector sensitivity on vacuum systems with high D{sub 2} backgrounds  

SciTech Connect

The DIII{endash}D National Fusion Facility at General Atomics (GA) focuses on plasma physics and fusion energy science. The DIII{endash}D tokamak is a 35 m{sup 3} toroidal vacuum vessel with over 200 ports for diagnostic instrumentation, cryogenics, microwave heating, and four large neutral beam injectors. Maintaining vacuum in the 10{sup {minus}8}&hthinsp;Torr range is crucial for producing high performance plasma discharges. He leak checking the DIII{endash}D tokamak and the neutral beamlines has historically been difficult. D{sub 2} is used as the fuel gas in most plasma discharges and neutral beams. After plasma operations, D{sub 2} outgassing from the torus walls and internal beamline components can exceed 10{sup {minus}4}&hthinsp;std&hthinsp;cm{sup 3}/s. The mass of the D{sub 2} molecule (4.028 u) is indistinguishable from that of the He atom (4.003 u) to a standard mass spectrometer leak detector. High levels of D{sub 2} reduce leak detector sensitivity and effectively mask the He trace gas signal rendering normal leak checking techniques ineffective. A simple apparatus was developed at GA to address these problems. It consists of a palladium based catalyst cell and associated valves and piping placed in series with the leak detector. This reduces the D{sub 2} throughput by a factor greater than 10&hthinsp;000, restoring leak detector sensitivity. This article will briefly discuss the development of the cell, the physical processes involved, the tests performed to quantify and optimize the processes, and the operational results at DIII{endash}D. {copyright} {ital 1999 American Vacuum Society.}

Busath, J.; Chiu, H.K. [General Atomics, San Diego, California 92186-5608 (United States)

1999-07-01T23:59:59.000Z

271

Simple catalytic cell for restoring He leak detector sensitivity on vacuum systems with high D{sub 2} backgrounds  

SciTech Connect

The DIII-D National Fusion Facility at General Atomics focuses on plasma physics and fusion energy science. The DIII-D tokamak is a 35 m{sup 3} toroidal vacuum vessel with over 200 ports for diagnostic instrumentation, cryogenics, microwave heating, and four large neutral beam injectors. Maintaining vacuum in the 10{sup {minus}8} Torr range is crucial for producing high performance plasma discharges. He leak checking the DIII-D tokamak and the neutral beamlines has historically been difficult. D{sub 2} is used as the fuel gas in most plasma discharges and neutral beams. After plasma operations, D{sub 2} out-gassing from the torus walls and internal beamline components can exceed 10{sup {minus}4} std cc/s. The mass of the D{sub 2} molecule (4.028 u) is indistinguishable from that of the He atom (4.003 u) to a standard mass spectrometer leak detector. High levels of D{sub 2} reduce leak detector sensitivity and effectively mask the He trace gas signal rendering normal leak checking techniques ineffective. A simple apparatus was developed at GA to address these problems. It consists of a palladium based catalyst cell and associated valves and piping placed in series with the leak detector. This reduces the D{sub 2} throughput by a factor greater than 10,000, restoring leak detector sensitivity. This paper will briefly discuss the development of the cell, the physical processes involved, the tests performed to quantify and optimize the processes, and the operational results at DIII-D.

Busath, J.; Chiu, H.K.

1998-12-01T23:59:59.000Z

272

Planning and care mark repair of 14-year old leak in Kuwait Oil Co. LPG tank 95  

SciTech Connect

This paper points out that the leak, which had been present for such a long time, completely saturated the perlite insulation with hydrocarbons, thus rendering the entire operation of inspection, repair, and maintenance of the inner tank a hazardous operation. It emphasizes the safety aspects, which were complicated by the saturated perlite as well as by the fact that the tank is situated in the middle of the LPG storage area with LPG tanks on either side. Tank design, making preparations, inspection, and repair are discussed. The fact that the leaking flanges were originally installed damaged, indicated the future need of tighter company quality control of all contractors work.

Shtayieh, S.

1983-01-10T23:59:59.000Z

273

Path forward for dosimetry cross sections  

SciTech Connect

In the 1980's the dosimetry community embraced the need for a high fidelity quantification of uncertainty in nuclear data used for dosimetry applications. This led to the adoption of energy-dependent covariance matrices as the accepted manner of quantifying the uncertainty data. The trend for the dosimetry community to require high fidelity treatment of uncertainty estimates has continued to the current time where requirements on nuclear data are codified in standards such as ASTM E 1018. This paper surveys the current state of the dosimetry cross sections and investigates the quality of the current dosimetry cross section evaluations by examining calculated-to-experimental ratios in neutron benchmark fields. In recent years more nuclear-related technical areas are placing an emphasis on uncertainty quantification. With the availability of model-based cross sections and covariance matrices produced by nuclear data codes, some nuclear-related communities are considering the role these covariance matrices should play. While funding within the dosimetry community for cross section evaluations has been very meager, other areas, such as the solar-related astrophysics community and the US Nuclear Criticality Safety Program, have been supporting research in the area of neutron cross sections. The Cross Section Evaluation Working Group (CSEWG) is responsible for the creation and maintenance of the ENDF/B library which has been the mainstay for the reactor dosimetry community. Given the new trends in cross section evaluations, this paper explores the path forward for the US nuclear reactor dosimetry community and its use of the ENDF/B cross-sections. The major concern is maintenance of the sufficiency and accuracy of the uncertainty estimate when used for dosimetry applications. The two major areas of deficiency in the proposed ENDF/B approach are: 1) the use of unrelated covariance matrices in ENDF/B evaluations and 2) the lack of 'due consideration' of experimental data in the evaluation. (authors)

Griffin, P.J. [Sandia National Laboratories, Albuquerque, NM 87185-1146 (United States); Peters, C.D. [Sandia Staffing Alliance, Albuquerque, NM 87110 (United States)

2011-07-01T23:59:59.000Z

274

Spin in the worldline path integral in 2 + 1 dimensions  

Science Conference Proceedings (OSTI)

We present a constructive derivation of a worldline path integral for the effective action and the propagator of a Dirac field in 2 + 1 dimensions, in terms of spacetime and SU(2) paths. After studying some general properties of this representation, we show that the auxiliary gauge-group variable can be integrated, deriving a worldline action depending only on x({tau}), the spacetime paths. We then show that the functional integral automatically imposes the constraint x{sup .2}({tau})=1, while there is a spin action, which agrees with the one one should expect for a spin-1/2 field.

Fosco, C.D. [Centro Atomico Bariloche and Instituto Balseiro, Comision Nacional de Energia Atomica, 8400 Bariloche (Argentina); Sanchez-Guillen, J. [Departamento de Fisica de Particulas, Facultad de Fisica and Instituto Galego de Fisica de Altas Energias, Universidad de Santiago, E-15782 Santiago de Compostela (Spain); Vazquez, R.A. [Departamento de Fisica de Particulas, Facultad de Fisica and Instituto Galego de Fisica de Altas Energias, Universidad de Santiago, E-15782 Santiago de Compostela (Spain)], E-mail: vazquez@fpaxp1.usc.es

2008-02-15T23:59:59.000Z

275

The Pipeline Still Leaks and More Than You Think: A Status Report on Gender Diversity in Biomedical Engineering  

E-Print Network (OSTI)

The Pipeline Still Leaks and More Than You Think: A Status Report on Gender Diversity in Biomedical is evidence of a still leaky pipeline in our discipline. In addition, the percentage of women faculty members in the pipeline--are reviewed. Keywords--Women, Engineering, Barriers, Bias. INTRODUCTION The lack of diversity

Bhatia, Sangeeta

276

A novel neural model-based approach to leak detection and localization in oil pipelines for environmental protection  

Science Conference Proceedings (OSTI)

Monitoring oil transporting pipelines is an important task for economical and safe operation, loss prevention, and environmental protection from crude oil emission. The leak detection of oil pipelines, therefore, plays a key role in the overall integrity ... Keywords: environmental and safety systems, fault and uncertainty modeling in dynamical systems, neural nets, process supervision

Alireza Paivar; Karim Salahshoor; Farzad Hourfar

2006-11-01T23:59:59.000Z

277

Investigation of leaks in fiberglass-reinforced pressure vessels by direct observation of hollow fibers in glass cloth  

SciTech Connect

A simple method of visual observation of hollow fibers within fiberglass cloth has been developed. This visualization can aid in determining the contribution these fibers make toward leaks observed in fiberglass-reinforced epoxy resin pressure or vacuum vessels. Photographs and frequency data of these hollow fibers are provided. 3 figs.

McAdams, J.

1988-01-01T23:59:59.000Z

278

A Path Forward for the Gulf Coast | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Path Forward for the Gulf Coast A Path Forward for the Gulf Coast A Path Forward for the Gulf Coast September 30, 2010 - 11:45am Addthis A Path Forward for the Gulf Coast Bill Valdez Bill Valdez Principal Deputy Director The Gulf Coast is a gate for commerce, producer of seafood, oil and natural gas, host to diverse ecosystems, home to millions and it's future is intertwined with the future of this Nation. Our country has made a promise to the people and small businesses of the Gulf Coast to restore their environment, economy and health, and continue a conversation with the fisherman, environmental workers, elected officials, health officials, scientists and Gulf residents on how to restore the Gulf. Those conversations and our promise to the Gulf are laid out in U.S. Navy Secretary Ray Mabus' report, which was released on Tuesday and presented

279

Measurements of Rainfall Properties Using Long Optical Path Imaging  

Science Conference Proceedings (OSTI)

Measurements of long-path optical attenuation of visible light due to rainfall are described, from which rainfall parameters are derived. Novel aspects of the method are the use of a distant uncontrolled and broadband spotlight source, and ...

S. G. Bradley; C. D. Stow; C. A. Lynch-Blosse

2000-06-01T23:59:59.000Z

280

DRAFT STAFF PAPER EXPECTED PATH 26 POWER FLOWS  

E-Print Network (OSTI)

under varying temperature conditions. Keywords: Electricity, demand, imports, transmission flows Marshall, Marc Pryor, David Vidaver Electricity Analysis Office Electricity Supply Assessment Division a 2008 staff assessment of electricity flows over Path 26 during heat spells in the summers of 2006

Note: This page contains sample records for the topic "lpf leak path" 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

A Surprising Path for Proton Transfer Without Hydrogen Bonds  

NLE Websites -- All DOE Office Websites (Extended Search)

A Surprising Path for Proton Transfer Without Hydrogen Bonds Print Hydrogen bonds are found everywhere in chemistry and biology and are critical in DNA and RNA. A hydrogen bond...

282

Lidar-Transmissometer Visibility Comparisons Over Slant and Horizontal Paths  

Science Conference Proceedings (OSTI)

Atmospheric visibility has been measured with the lidar technique using the “slope method.” The system is briefly described and some aspects of slant path visibility measurements for aeronautical applications are discussed. Measurements in dense ...

J. L. Gaumet; A. Petitpa

1982-05-01T23:59:59.000Z

283

Thermal Conductivity Spectroscopy Technique to Measure Phonon Mean Free Paths  

E-Print Network (OSTI)

Size effects in heat conduction, which occur when phonon mean free paths (MFPs) are comparable to characteristic lengths, are being extensively explored in many nanoscale systems for energy applications. Knowledge of MFPs ...

Schmidt, A. J.

284

Combining Path Integration and Remembered Landmarks When Navigating without Vision  

E-Print Network (OSTI)

This study investigated the interaction between remembered landmark and path integration strategies for estimating current location when walking in an environment without vision. We asked whether observers navigating without ...

Schrater, Paul R.

285

Optimally controlling hybrid electric vehicles using path forecasting  

E-Print Network (OSTI)

Hybrid Electric Vehicles (HEVs) with path-forecasting belong to the class of fuel efficient vehicles, which use external sensory information and powertrains with multiple operating modes in order to increase fuel economy. ...

Katsargyri, Georgia-Evangelina

2008-01-01T23:59:59.000Z

286

Path dependent receding horizon control policies for hybrid electric vehicles  

E-Print Network (OSTI)

Future hybrid electric vehicles (HEVs) may use path-dependent operating policies to improve fuel economy. In our previous work, we developed a dynamic programming (DP) algorithm for prescribing the battery state of charge ...

Kolmanovsky, Ilya V.

287

Optimally Controlling Hybrid Electric Vehicles using Path Forecasting  

E-Print Network (OSTI)

The paper examines path-dependent control of Hybrid Electric Vehicles (HEVs). In this approach we seek to improve HEV fuel economy by optimizing charging and discharging of the vehicle battery depending on the forecasted ...

Kolmanovsky, Ilya V.

288

DOE Joint Genome Institute: Spikemoss Genome Offers New Paths...  

NLE Websites -- All DOE Office Websites (Extended Search)

5, 2011 Spikemoss Genome Offers New Paths for Biofuels Research--Bridges Plant Development Gap WALNUT CREEK, Calif.- It's not quite Christmas, but the DNA sequence of a small plant...

289

The paths and characteristics of real estate entrepreneurs  

E-Print Network (OSTI)

What paths have real estate entrepreneurs taken to establish their own firm? Also, what characteristics did they develop and utilize in the process? This thesis gives the unique opportunity to better understand the life ...

Kazmierski, Michael (Michael Anthony)

2008-01-01T23:59:59.000Z

290

A Potential Path to Emissions-Free Fossil Energy | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

may not be a household term just yet, it represents one promising path forward for using fossil fuels as part of a clean energy future. At most coal fired power plants, the coal...

291

GRASP WITH PATH-RELINKING FOR THE GENERALIZED ...  

E-Print Network (OSTI)

elite set P does not have at least ? elements, then if ?? is feasible and sufficiently different ...... Fundamentals of scatter search and path relinking. ... In F. Glover and G. Kochenberger, editors, Handbook of Metaheuristics, pages. 219– 249.

292

Path predicate abstraction by complete interval property checking  

Science Conference Proceedings (OSTI)

This paper describes a method to create an abstract model from a set of properties fulfilling a certain completeness criterion. The proposed abstraction can be understood as a path predicate abstraction. As in predicate abstraction, certain concrete ...

Joakim Urdahl; Dominik Stoffel; Jörg Bormann; Markus Wedler; Wolfgang Kunz

2010-10-01T23:59:59.000Z

293

Building Energy Software Tools Directory: SunPath  

NLE Websites -- All DOE Office Websites (Extended Search)

SunPath Calculates the position of the center of the sun in the sky at locations, dates, and times specified by the user. Numerous calculation options are available. Includes a...

294

The Path of Carbon in Photosynthesis VII Respiration and Photosynthesis  

E-Print Network (OSTI)

seconds, me-minutes, PS. -photosynthesis mith C 14 02, C. -treatments subsequent t o photosynthesis were done i n C02-THE PATH OF CARBON I N PHOTOSYNTHESIS, AND PHOTOSYNTHESIS*

Benson, A.A.; Calvin, M.

1949-01-01T23:59:59.000Z

295

Diverging Paths for IT Industries in Taiwan and Korea  

E-Print Network (OSTI)

E B A article, Twn/Korea 11-9-94 Diverging PathsIT Industries in Taiwan and Korea Jason Dedrick and Kennethtechnology (IT) industry in Korea and Taiwan. Riding the

Dedrick, Jason; Kraemer, Kenneth L.

1994-01-01T23:59:59.000Z

296

Path planning of Autonomous Underwater Vehicles for adaptive sampling  

E-Print Network (OSTI)

This thesis develops new methods for path planning of Autonomous Underwater Vehicles for adaptive sampling. The problem is approached in an optimization framework and two methods are developed to solve it based on Mixed ...

Yilmaz, Namik Kemal, 1975-

2006-01-01T23:59:59.000Z

297

Loop Current Eddy Paths in the Western Gulf of Mexico  

Science Conference Proceedings (OSTI)

The paths of anticyclonic Loop Current eddies in the western Gulf of Mexico have been investigated using ARGOS-tracked drifters accompanied by hydrographic surveys. The analysis used orbit parameters derived from a least square fit of a ...

Peter Hamilton; G. S. Fargion; D. C. Biggs

1999-06-01T23:59:59.000Z

298

A Shared Path Toward a Sustainable Energy Future  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Shared Path Toward a Sustainable Energy Future Shared Path Toward a Sustainable Energy Future The DOE Office of Indian Energy's approach is, first and foremost, a collaborative one. Led by Director Tracey A. LeBeau (Cheyenne River Sioux), the office works with tribal nations, federal agencies, state governments, nongovernmental organizations, and the private sector to develop the considerable energy resources that exist on Indian lands. To guide the strategic planning and implementation of the department's tribal

299

Initial Studies Toward Real-Time Transmission Path Rating  

Science Conference Proceedings (OSTI)

Demand continues to increase while transmission line construction is being constrained by multiple factors— economic, environmental, and political. Effective and efficient utilization of transmission lines is thus of great importance in an open access environment. Large blocks of power are transferred from areas with inexpensive generation to heavy load demand areas or areas with high generation costs. This results in some transmission paths being loaded closer to their path ratings, which limits further power transfer between areas. Traditionally, rating of important paths was determined off line by assuming the worst-case study scenario; once determined, it could be used for years. With increasing uncertainty arising from rapid growth of renewable energy and smart technologies, path rating studies are needed in near-real time to account for the latest system status and support a reliable and economic power grid. This paper adopts a simplified procedure based on standards of the North American Electric Reliability Corporation (NERC) to determine total transfer capability (TTC) or transfer limit for the purpose of demonstrating the benefits and necessity of real-time path rating. Initial studies are conducted to compute TTC of a two-area test system and a 39-bus test system. Results indicate that path rating can be significantly affected by loading conditions, generator schedules, system topology and other factors.

Singh, Ruchi; Diao, Ruisheng; Cai, Niannian; Huang, Zhenyu; Tuck, Brian; Guo, Xinxin

2012-07-26T23:59:59.000Z

300

DETECTION OF HISTORICAL PIPELINE LEAK PLUMES USING NON-INTRUSIVE SURFACE-BASED GEOPHYSICAL TECHNIQUES AT THE HANFORD NUCLEAR SITE WASHINGTON USA  

Science Conference Proceedings (OSTI)

Historical records from the Department of Energy Hanford Nuclear Reservation (in eastern WA) indicate that ruptures in buried waste transfer pipelines were common between the 1940s and 1980s, which resulted in unplanned releases (UPRs) of tank: waste at numerous locations. A number of methods are commercially available for the detection of active or recent leaks, however, there are no methods available for the detection of leaks that occurred many years ago. Over the decades, leaks from the Hanford pipelines were detected by visual observation of fluid on the surface, mass balance calculations (where flow volumes were monitored), and incidental encounters with waste during excavation or drilling. Since these detection methods for historic leaks are so limited in resolution and effectiveness, it is likely that a significant number of pipeline leaks have not been detected. Therefore, a technology was needed to detect the specific location of unknown pipeline leaks so that characterization technologies can be used to identify any risks to groundwater caused by waste released into the vadose zone. A proof-of-concept electromagnetic geophysical survey was conducted at an UPR in order to image a historical leak from a waste transfer pipeline. The survey was designed to test an innovative electromagnetic geophysical technique that could be used to rapidly map the extent of historical leaks from pipelines within the Hanford Site complex. This proof-of-concept test included comprehensive testing and analysis of the transient electromagnetic method (TEM) and made use of supporting and confirmatory geophysical methods including ground penetrating radar, magnetics, and electrical resistivity characterization (ERC). The results for this initial proof-of-concept test were successful and greatly exceeded the expectations of the project team by providing excellent discrimination of soils contaminated with leaked waste despite the interference from an electrically conductive pipe.

SKORSKA MB; FINK JB; RUCKER DF; LEVITT MT

2010-12-02T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Solar technologies and the soft path: an empirical examination  

Science Conference Proceedings (OSTI)

A US national probability sample of 2023 traditional energy users and a purposive sample of 3809 solar energy technology owners are compared to assess whether those who owned solar energy technologies in 1980 have more soft path preferences (SPP) (e.g., attitudes and behaviors compatible with soft energy path developments) than do those who did not own such technologies. It is suggested that SPP is a necessary but not sufficient condition for the social structural transformation of society to the soft energy path proposed by Amory Lovins. A soft-path preferences scale is developed. The scale values for solar and nonsolar homeowners, for active and passive solar technology owners, and for those owing the technologies for four different time periods are compared. The nonsolar homeowners, passive technology owners, and those who owned the technologies from one to five years have the highest SPP scores. The greatest differences were found in the dimension of natural resources conservation. Partial least squares structural equation modeling is used to examine an extension and specification of Lovins' theory of soft-energy-path development. A model is created which focuses on the process of SPP development. Energy vulnerability needs, contextual resources, type of solar technologies, technological problems, and evaluation are the independent variables of the model.

Lodwick, D.G.

1987-01-01T23:59:59.000Z

302

Fast false path identification based on functional unsensitizability using RTL information  

Science Conference Proceedings (OSTI)

In this paper, we propose a method for identifying false paths based on functional unsensitizability of path delay faults. By using RTL structural information, a number of gate level paths are bound into an RTL path and the bundle of them can be identified ...

Yuki Yoshikawa; Satoshi Ohtake; Tomoo Inoue; Hideo Fujiwara

2009-01-01T23:59:59.000Z

303

The two-equal-disjoint path cover problem of Matching Composition Network  

Science Conference Proceedings (OSTI)

Embedding of paths have attracted much attention in the parallel processing. Many-to-many communication is one of the most central issues in various interconnection networks. A graph G is globally two-equal-disjoint path coverable if for any two distinct ... Keywords: Hamiltonian-connectivity, Interconnection networks, Matching Composition Networks, Two-equal-disjoint path cover, k disjoint path cover

Pao-Lien Lai; Hong-Chun Hsu

2008-06-01T23:59:59.000Z

304

RPS: range-based path selection method for concurrent multipath transfer  

Science Conference Proceedings (OSTI)

Throughput of Concurrent Multipath Transfer varies with different path selection schemes. As the number of path increases, the path selection solution space increases exponentially while receiving buffer efficiency decreases. To solve this problem, we ... Keywords: CMT, multipath, path selection, range-based, receive buffer, transport layer

Wang Yang; Hewu Li; Fenghua Li; Qian Wu; Jianping Wu

2010-06-01T23:59:59.000Z

305

Measured leak rates of the temporary seals in DWPF canistered waste forms after three years of on site storage  

SciTech Connect

In the summer of 1990 a study was carried out to determine the-internal pressure, relative humidity, and chemical composition of the gas within the free volume of four canistered waste forms produced at TNX in May of 1988. Three of these canistered waste forms were sealed only by temporary seals and subsequently stored in the TNX boneyard' with no protection. The fourth canister was sealed by upset resistance welding. All three canisters with temporary seals were decontaminated by aqueous frit blasting. It was important to remeasure the leak rates of these seals to ensure that leaktightness had not deteriorated during canister handling and storage prior to the time the experiment were performed. This paper details the results of two separate measurements of the leak rates of these seals.

Harbour, J.R.; Miller, T.J.

1992-04-06T23:59:59.000Z

306

Measured leak rates of the temporary seals in DWPF canistered waste forms after three years of on site storage  

SciTech Connect

In the summer of 1990 a study was carried out to determine the-internal pressure, relative humidity, and chemical composition of the gas within the free volume of four canistered waste forms produced at TNX in May of 1988. Three of these canistered waste forms were sealed only by temporary seals and subsequently stored in the TNX `boneyard` with no protection. The fourth canister was sealed by upset resistance welding. All three canisters with temporary seals were decontaminated by aqueous frit blasting. It was important to remeasure the leak rates of these seals to ensure that leaktightness had not deteriorated during canister handling and storage prior to the time the experiment were performed. This paper details the results of two separate measurements of the leak rates of these seals.

Harbour, J.R.; Miller, T.J.

1992-04-06T23:59:59.000Z

307

Guidelines to achieve seals with minimal leak rates for HWR-NPR coolant system components  

SciTech Connect

Seal design practices that are acceptable in pressurized-water and boiling-water reactors in the United States are not usable for the Heavy Water Reactor-New Production Reactor (HWR-NPR) because of the stringent requirement on tritium control for the atmosphere within its containment building. To maintain an atmosphere in which workers do not need protective equipment, the components of the coolant system must have a cumulative leak rate less than 0.00026 L/s. Existing technology for seal systems was reviewed with regard to flange, elastomer, valve, and pump design. A technology data base for the designers of the HWR-NPR coolant system was derived from operating experience and seal development work on reactors in the United States, Canada, and Europe. This data base was then used to generate guidelines for the design of seals and/or joints for the HWR-NPR coolant system. Also discussed are needed additional research and development, as well as the necessary component qualification tests for an effective quality control program. 141 refs., 21 figs., 14 tabs.

Finn, P.A.

1991-03-01T23:59:59.000Z

308

METHOD AND APPARATUS FOR THE DETECTION OF LEAKS IN PIPE LINES  

DOE Patents (OSTI)

A method is described for detecting leaks in pipe lines carrying fluid. The steps include the following: injecting a radioactive solution into a fluid flowing in the line; flushing the line clear of the radioactive solution; introducing a detector-recorder unit, comprising a radioactivity radiation detector and a recorder which records the detector signal over a time period at a substantially constant speed, into the line in association with a go-devil capable of propelling the detector-recorder unit through the line in the direction of the fluid flow at a substantia1ly constant velocity; placing a series of sources of radioactivity at predetermined distances along the downstream part of the line to make a characteristic signal on the recorder record at intervals corresponding to the location of said sources; recovering the detector-recorder unit at a downstream point along the line; transcribing the recorder record of any radioactivity detected during the travel of the detector- recorder unit in terms of distance along the line. (AEC)

Jefferson, S.; Cameron, J.F.

1961-11-28T23:59:59.000Z

309

The depth of the oil/brine interface and crude oil leaks in SPR caverns  

Science Conference Proceedings (OSTI)

Monitoring wellhead pressure evolution is the best method of detecting crude oil leaks in SPR caverns while oil/brine interface depth measurements provide additional insight. However, to fully utilize the information provided by these interface depth measurements, a thorough understanding of how the interface movement corresponds to cavern phenomena, such as salt creep, crude oil leakage, and temperature equilibration, as well as to wellhead pressure, is required. The time evolution of the oil/brine interface depth is a function of several opposing factors. Cavern closure due to salt creep and crude oil leakage, if present, move the interface upward. Brine removal and temperature equilibration of the oil/brine system move the interface downward. Therefore, the relative magnitudes of these factors determine the net direction of interface movement. Using a mass balance on the cavern fluids, coupled with a simplified salt creep model for closure in SPR caverns, the movement of the oil/brine interface has been predicted for varying cavern configurations, including both right-cylindrical and carrot-shaped caverns. Three different cavern depths and operating pressures have been investigated. In addition, the caverns were investigated at four different points in time, allowing for varying extents of temperature equilibration. Time dependent interface depth changes of a few inches to a few feet were found to be characteristic of the range of cases studied. 5 refs, 19 figs., 1 tab.

Heffelfinger, G.S.

1991-06-01T23:59:59.000Z

310

The world oil market and OPEC behavior: The leak-producer price leader model  

SciTech Connect

This is an economic study of the world's oil market in which OPEC plays the central role in determining the oil supply and price. Understanding OPEC's behavior is at the core of understanding the world's oil market. However, oil is a resource belonging to the family of natural resources known as exhaustible. We do not produce oil; we only extract and distribute a fixed amount of the resource over generations. Optimal extraction is a matter of concern to both suppliers and consumers. First, it is shown that using the traditional theory of producers behavior in the conventional commodity markets to explain extractors behavior in exhaustible resource markets is completely wrong. Second, current models of OPEC behavior are reviewed. Third, an alternative model is introduced. Previous authors have not directed their models to give explanations to the peculiar observations in oil market. This model divides the world's oil suppliers into: the free riders (non-OPEC oil producers), the OPEC hawks (a group within OPEC) and the leak-producer price leader (Saudi Arabia). Three factors, namely relatively big oil reserves, no other sources of income, and the avoidance of the so-called backstop technology make Saudi Arabia more interested in lower oil prices than are other oil extractors.

Aboalela, A.A.

1988-01-01T23:59:59.000Z

311

AIRBORNE, OPTICAL REMOTE SENSING OF METHANE AND ETHANE FOR NATURAL GAS PIPLINE LEAK DETECTION  

SciTech Connect

Ophir Corporation was awarded a contract by the U. S. Department of Energy, National Energy Technology Laboratory under the Project Title ''Airborne, Optical Remote Sensing of Methane and Ethane for Natural Gas Pipeline Leak Detection'' on October 14, 2002. The third six-month technical report contains a summary of the progress made towards finalizing the design and assembling the airborne, remote methane and ethane sensor. The vendor has been chosen and is on contract to develop the light source with the appropriate linewidth and spectral shape to best utilize the Ophir gas correlation software. Ophir has expanded upon the target reflectance testing begun in the previous performance period by replacing the experimental receiving optics with the proposed airborne large aperture telescope, which is theoretically capable of capturing many times more signal return. The data gathered from these tests has shown the importance of optimizing the fiber optic receiving fiber to the receiving optic and has helped Ophir to optimize the design of the gas cells and narrowband optical filters. Finally, Ophir will discuss remaining project issues that may impact the success of the project.

Jerry Myers

2004-05-12T23:59:59.000Z

312

Technology Analysis - Multi-Path Transportation Futures Study  

NLE Websites -- All DOE Office Websites (Extended Search)

Multi-Path Transportation Futures Study: Vehicle Characterization and Scenario Analyses Multi-Path Transportation Futures Study: Vehicle Characterization and Scenario Analyses The Multi-Path Study began by defining the basic physical characteristics of future advanced midsize cars and midsize SUVs with drivetrain technologies ranging from advanced SI and CI (diesel) engine-based conventional drivetrains through hybrid drivetrains (including plug-ins), to fuel cell hybrids and plug-in hybrids, through pure-electric drivetrains. The study evaluates these vehiclesÂ’ fuel economy using ArgonneÂ’s PSAT simulation model, estimates their costs, and does detailed analyses of their cost-effectiveness, balancing first costs against fuel savings. The study uses a version of the National Energy Modeling System (developed by the Energy Information Administration in the U.S. Department of Energy) to evaluate several scenarios assuming different vehicle costs (one set based on a literature review, one based on DOE goals) and availability of purchase subsidies.

313

What's Next for Nuclear Energy? MIT Students Discuss Path Forward |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

What's Next for Nuclear Energy? MIT Students Discuss Path Forward What's Next for Nuclear Energy? MIT Students Discuss Path Forward What's Next for Nuclear Energy? MIT Students Discuss Path Forward June 19, 2012 - 10:41am Addthis Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. What does this project do? The Nuclear Energy University Program, has provided MIT and 78 other schools with $220 million in research grants and related support.

314

A Heat Capacity Estimator for Fourier Path Integral Simulations  

E-Print Network (OSTI)

Previous heat capacity estimators useful in path integral simulations have variances that grow with the number of path variables included. In the present work a new specific heat estimator for Fourier path integral Monte Carlo simulations is derived using methods similar to those used in developing virial energy estimators. The resulting heat capacity estimator has a variance that is roughly independent of the number of Fourier coe#cients (k max ) included, and the asymptotic convergence rate is shown to be proportional to 1/k 2 max when partial averaging is included. Quantum Monte Carlo simulations are presented to test the estimator using two one-dimensional models and for Lennard-Jones representations of Ne 13 . For finite kmax , using numerical methods, the calculated heat capacity is found to diverge at low temperatures for the potential functions studied in this work. Extrapolation methods enable useful results to be determined over a wide temperature range. Typeset using REVT...

J. P. Neirotti; David L. Freeman; J. D. Doll

1999-01-01T23:59:59.000Z

315

What's Next for Nuclear Energy? MIT Students Discuss Path Forward |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Next for Nuclear Energy? MIT Students Discuss Path Forward Next for Nuclear Energy? MIT Students Discuss Path Forward What's Next for Nuclear Energy? MIT Students Discuss Path Forward June 19, 2012 - 10:41am Addthis Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. Dr. Peter Lyons, Assistant Secretary for Nuclear Energy met with students at MIT during an informal roundtable to talk what's next for nuclear energy and for the nuclear power industry. | Photo courtesy of Jake Dewitt. What does this project do? The Nuclear Energy University Program, has provided MIT and 78 other schools with $220 million in research grants and related support. Investing in the next generation isn't just about technology -- it's

316

DOE Continues Path Forward on Global Nuclear Energy Partnership |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Continues Path Forward on Global Nuclear Energy Partnership Continues Path Forward on Global Nuclear Energy Partnership DOE Continues Path Forward on Global Nuclear Energy Partnership August 3, 2006 - 8:39am Addthis Department Announces $20 Million for GNEP Siting Studies and Seeks Further Coordination with Industry WASHINGTON, DC - The U.S. Department of Energy (DOE) today announced $20 million to conduct detailed siting studies for public or commercial entities interested in hosting DOE's Global Nuclear Energy Partnership (GNEP) facilities. Entities could qualify to receive up to $5 million per site. DOE also announced that it is seeking expressions of interest to obtain input from U.S. and international nuclear industry on the feasibility of accelerating development and deployment of advanced recycling technologies by proceeding with commercial scale demonstration

317

The Path a Proton Takes Through a Fuel Cell Membrane  

NLE Websites -- All DOE Office Websites (Extended Search)

Path a Proton Path a Proton Takes Through a Fuel Cell Membrane The Path a Proton Takes Through a Fuel Cell Membrane October 11, 2012 | Tags: Basic Energy Sciences (BES), Chemistry, Franklin, Hopper Linda Vu, lvu@lbl.gov, +1 510 495 2402 Ram.jpg The cover represents the environment around the side chain. The right side is the water network that exists between the sulfonate groups shown in yellow. The left side is the short chain with the sulfonate group. Many experts believe that fuel cells may someday serve as revolutionary clean energy conversion devices for transportation and other portable power applications. Because they generate electricity by converting chemical hydrogen and oxygen into water, fuel cells generate energy much more efficiently than combustion devices, and with near-zero pollutant

318

New Reports Chart Offshore Wind's Path Forward | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Reports Chart Offshore Wind's Path Forward Reports Chart Offshore Wind's Path Forward New Reports Chart Offshore Wind's Path Forward December 12, 2012 - 2:29pm Addthis Taking a look at the challenges and opportunities that lie ahead as the U.S. prepares to enter the offshore wind market. Click here to view the full infographic. | Infographic by Sarah Gerrity. Taking a look at the challenges and opportunities that lie ahead as the U.S. prepares to enter the offshore wind market. Click here to view the full infographic. | Infographic by Sarah Gerrity. Taking a look at the challenges and opportunities that lie ahead as the U.S. prepares to enter the offshore wind market. Click here to view the full infographic. | Infographic by Sarah Gerrity.

319

LANL researchers improve path to producing uranium compounds, candidates  

NLE Websites -- All DOE Office Websites (Extended Search)

Researchers improve path to producing uranium compounds Researchers improve path to producing uranium compounds LANL researchers improve path to producing uranium compounds, candidates for advanced nuclear fuels Enhance the ability to develop advanced nuclear fuels in a safer, simpler manner. April 7, 2011 This illustration shows the structures of UI4(1,4-dioxane)2 (left) and the UI3(1,4-dioxane)1.5 complexes. This illustration shows the structures of UI4(1,4-dioxane)2 (left) and the UI3(1,4-dioxane)1.5 complexes. Contact Kevin Roark Communicatons Office (505) 665-9202 Email LOS ALAMOS, New Mexico, April 7, 2010- Advances made by researchers at Los Alamos National Laboratory could enhance the ability of scientists to develop advanced nuclear fuels in a safer, simpler manner. Uranium chemistry research relies heavily on a variety of uranium "starting

320

Effective Graph Clustering for Path Queries in Digital Map Databases  

E-Print Network (OSTI)

In this paper, we present an experimental evaluation of graph clustering strategies in terms of their effectiveness in optimizing I/O for path query processing in digital map databases. Clustering optimization is attractive because it does not incurs any run-time cost, and is complimentary to many of the existing techniques in path query optimization. We first propose a novel graph clustering technique, called Spatial Partition Clustering (SPC), that creates balanced partitions of links based on the spatial proximity of their origin nodes. We then select three alternative clustering techniques from the literature, namely two-way partitioning, approximately topological clustering, and random clustering, to compare their performance in path query processing with SPC. Experimental evaluation indicates that our SPC performs the best for the high-locality graphs (such as GIS maps), whereas the two-way partitioning approach performs the best for no-locality random graphs. 1 Introduction 1....

Yun-Wu Huang; Ning Jing; Elke A. Rundensteiner

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

FESAC White Paper Path to Market for Compact Systems July 2012 The Path to Market for Compact Modular Fusion Power Cores1  

E-Print Network (OSTI)

FESAC White Paper Path to Market for Compact Systems July 2012 The Path to Market for Compact of Representatives (2010) #12;FESAC White Paper Path to Market for Compact Systems July 2012 (TRL) of a technology) distributed power generation. These units can be added to existing facilities when and where needed, or phased

322

Generating analyses for detecting faults in path segments  

Science Conference Proceedings (OSTI)

Although static bug detectors are extensively applied, there is a cost in using them. One challenge is that static analysis often reports a large number of false positives but little diagnostic information. Also, individual bug detectors need to be built ... Keywords: demand-driven, generate analysis, path segment, specification

Wei Le; Mary Lou Soffa

2011-07-01T23:59:59.000Z

323

Linking Bayesian networks and PLS path modeling for causal analysis  

Science Conference Proceedings (OSTI)

Causal knowledge based on causal analysis can advance the quality of decision-making and thereby facilitate a process of transforming strategic objectives into effective actions. Several creditable studies have emphasized the usefulness of causal analysis ... Keywords: Bayesian network, Causal analysis, PLS path modeling

Wei Wen Wu

2010-01-01T23:59:59.000Z

324

An optimum robot path planning with payload constraints  

Science Conference Proceedings (OSTI)

This paper presents a general methodology for the off-line planning of optimal trajectory of robot manipulators by taking into account the grasping forces in the manipulator gripper. The mechanical energy of the actuators has been considered for the ... Keywords: Path planning, Payload constraints, Programming, Robotics

Sezimaria F. P. Saramago; Marco Ceccarelli

2002-07-01T23:59:59.000Z

325

Land mine detecting robot capable of path planning  

Science Conference Proceedings (OSTI)

The purpose of Landmine detecting robot is to cover maximum possible area, presentation of landmines and the left over area on a visual map with accuracy in millimeters. This paper presents a prototype model of land mine detecting robot that is powerful ... Keywords: PIC microcontroller, graphical user interface, image processing, land mine detection, robot path mapping

Muhammad Zubair; Muhammad Ahmad Choudhry

2011-04-01T23:59:59.000Z

326

Mitigating multi-path fading in a mobile mesh network  

Science Conference Proceedings (OSTI)

By using robots as routers, a team of networked robots can provide a communication substrate to establish a wireless mesh network. The mobile mesh network can autonomously optimize its configuration, increasing performance. One of the main sources of ... Keywords: Complex environments, Distributed optimization, Experimental and prototype results, Mobile and wireless ad-hoc networks, Multi-path fading

Marcos A. M. Vieira, Matthew E. Taylor, Prateek Tandon, Manish Jain, Ramesh Govindan, Gaurav S. Sukhatme, Milind Tambe

2013-06-01T23:59:59.000Z

327

Adaptive Path-Based Multicast on Wormhole-Routed Hypercubes  

Science Conference Proceedings (OSTI)

In this paper, we consider path-based multicast on wormhole-routed hypercubes. A minimum set of routing restrictions is used as the base routing algorithm. To correctly perform multicast, we present the natural list to sort the destination nodes. It ...

Chien-Min Wang; Yomin Hou; Lih-Hsing Hsu

2002-08-01T23:59:59.000Z

328

Allinea DDT: Your Partner in Finding Debugged Paths on Mira  

E-Print Network (OSTI)

for > 1 year Petascaled infrastructure and UI Scaling for IBM Blue Gene /P Acceptance testing at ALCF Scaling for IBM Blue Gene /Q Addressing ALCF requirements ­ Early access for IBM Blue Gene /Q expected.alcf.anl.gov/sites/www.alcf.anl.gov/files/L2PAllinea_0.pdf #12;A Path to Petascale on IBM BG /P Phase

Kemner, Ken

329

MANAGING HANFORD'S LEGACY NO-PATH-FORWARD WASTES TO DISPOSITION  

Science Conference Proceedings (OSTI)

The U.S. Department of Energy (DOE) Richland Operations Office (RL) has adopted the 2015 Vision for Cleanup of the Hanford Site. This vision will protect the Columbia River, reduce the Site footprint, and reduce Site mortgage costs. The CH2M HILL Plateau Remediation Company's (CHPRC) Waste and Fuels Management Project (W&FMP) and their partners support this mission by providing centralized waste management services for the Hanford Site waste generating organizations. At the time of the CHPRC contract award (August 2008) slightly more than 9,000 m{sup 3} of waste was defined as 'no-path-forward waste.' The majority of these wastes are suspect transuranic mixed (TRUM) wastes which are currently stored in the low-level Burial Grounds (LLBG), or stored above ground in the Central Waste Complex (CWC). A portion of the waste will be generated during ongoing and future site cleanup activities. The DOE-RL and CHPRC have collaborated to identify and deliver safe, cost-effective disposition paths for 90% ({approx}8,000 m{sup 3}) of these problematic wastes. These paths include accelerated disposition through expanded use of offsite treatment capabilities. Disposal paths were selected that minimize the need to develop new technologies, minimize the need for new, on-site capabilities, and accelerate shipments of transuranic (TRU) waste to the Waste Isolation Pilot Plant (WIPP) in Carlsbad, New Mexico.

WEST LD

2011-01-13T23:59:59.000Z

330

Multi-agent navigation using path-based vector fields  

Science Conference Proceedings (OSTI)

We present an approach to multi-agent navigation, that is based on generating potential-fields from A*-paths. We will introduce and compare two algorithms: 1) a geometrical algorithm that is based on quads, and 2) an images-based algorithm. We show empirically ...

Tristan Behrens; Randolf Schärfig; Tim Winkler

2009-09-01T23:59:59.000Z

331

UAV Path Planning for Structure Inspection in Windy Environments  

Science Conference Proceedings (OSTI)

In this paper, we consider the structure inspection problem using a miniature unmanned aerial vehicle (UAV). The influence of the wind on the UAV behavior and onboard energy limitations are important parameters that must be taken into account in the ... Keywords: Path planning, Traveling salesman problem, Vehicle routing problem, Zermelo navigation

Jose Alfredo Guerrero; Yasmina Bestaoui

2013-01-01T23:59:59.000Z

332

Designing Snakey: A Tangible User Interface Supporting Well Path Planning  

E-Print Network (OSTI)

is a fundamental task present in different stages of oil/gas field development from early exploration to production intuitive manipulation and interaction with 3D curves, common to underground well path exploration, but rather to augment them with tangible and collaborative interaction, facilitating spatial exploration

333

Supercomputer Architectures: The Path to Tera/PetaFLOPS  

E-Print Network (OSTI)

Trillions of Data Items in RAM! Example: 1 KM grid over USA 4000x2000x100 = 800 million grid points If eachSupercomputer Architectures: The Path to Tera/PetaFLOPS Stephen Jenks Electrical Engineering and Computer Science sjenks@uci.edu #12;UCI EECS Scalable Parallel and Distributed Systems Lab 2 Mostly Worked

Shinozuka, Masanobu

334

Quantum Path Interference through Incoherent Motions in Multilevel Quantum Systems  

E-Print Network (OSTI)

The fluctuating incoherent environment in the condensed phase plays an important role in the dynamics and steady states of open quantum systems. The most fascinating aspect in open quantum systems is quantum coherence induced by path interference of incoherent motions. We propose a modified Ehrenfest scheme to study the path interference of incoherent motions in multi-level quantum systems. The detailed balance is enforced by considering the quantum correction of two-time correction functions based on second order master (rate) equations. With the modified Ehrenfest method, we can study the steady state populations and other quantum observables under different thermal dynamic conditions, such as energy relaxation and non-Markovian effects. For the three level system under incoherent coupling, we show how the steady state populations are influenced by the quantum path interference of incoherent fluctuations (Agarwal-Fano-like interference). We discuss the modified Ehrenfest method and its connection with stochastic Langevin equations and second order master equations. Most existing quantum MD simulation methods, particularly Master equation techniques, fall into the category of the weak coupling limit due to the nature of detailed balance. Although the modified Ehrenfest method is amicable to second-order master equations, it is actually a better way to model the quantum path interference since it preserves multi-time memory kernels. Therefore, it enables us to study the quantum path interference. This method can be used as quantum MD simulators for large open quantum systems like solar cell, (organic) LED, etc. The future extension of this method beyond the modified Ehrenfest scheme can be done with efficient wavepacket propagation methods by treating the bath modes in full quantum mechanical way.

Xin Chen

2013-05-17T23:59:59.000Z

335

SURFACE GEOPHYSICAL EXPLORATION DEVELOPING NONINVASIVE TOOLS TO MONITOR PAST LEAKS AROUND HANFORD TANK FARMS  

SciTech Connect

A characterization program has been developed at Hanford to image past leaks in and around the underground storage tank facilities. The program is based on electrical resistivity, a geophysical technique that maps the distribution of electrical properties of the subsurface. The method was shown to be immediately successful in open areas devoid of underground metallic infrastructure, due to the large contrast in material properties between the highly saline waste and the dry sandy host environment. The results in these areas, confirmed by a limited number of boreholes, demonstrate a tendency for the lateral extent of the underground waste plume to remain within the approximate footprint of the disposal facility. In infrastructure-rich areas, such as tank farms, the conventional application of electrical resistivity using small point-source surface electrodes initially presented a challenge for the resistivity method. The method was then adapted to directly use the buried infrastructure as electrodes for both transmission of electrical current and measurements of voltage. For example, steel-cased wells that surround the tanks were used as long electrodes, which helped to avoid much of the infrastructure problems. Overcoming the drawbacks of the long electrode method has been the focus of our work over the past seven years. The drawbacks include low vertical resolution and limited lateral coverage. The lateral coverage issue has been improved by supplementing the long electrodes with surface electrodes in areas devoid of infrastructure. The vertical resolution has been increased by developing borehole electrode arrays that can fit within the small-diameter drive casing of a direct push rig. The evolution of the program has led to some exceptional advances in the application of geophysical methods, including logistical deployment of the technology in hazardous areas, development of parallel processing resistivity inversion algorithms, and adapting the processing tools to accommodate electrodes of all shapes and locations. The program is accompanied by a full set of quality assurance procedures that cover the layout of sensors, measurement strategies, and software enhancements while insuring the integrity of stored data. The data have been shown to be useful in identifying previously unknown contaminant sources and defining the footprint of precipitation recharge barriers to retard the movement of existing contamination.

MYERS DA; RUCKER DF; LEVITT MT; CUBBAGE B; NOONAN GE; MCNEILL M; HENDERSON C

2011-06-17T23:59:59.000Z

336

An Evaluation of MWR Retrievals of Liquid Water Path  

NLE Websites -- All DOE Office Websites (Extended Search)

Evaluation of MWR Retrievals Evaluation of MWR Retrievals of Liquid Water Path and Precipitable Water Vapor R. T. Marchand and T. P. Ackerman Pacific Northwest National Laboratory Richland, Washington Introduction This paper offers some observations on the quality of Microwave Radiometer (MWR) retrievals of precipitable water vapor (PWV) and liquid water path (LWP). The paper shows case study comparisons between the standard "statistical" approach and those obtained using an iterative solution of the microwave radiative transfer equations. These examples show how improvements in the retrieval of LWP can be obtained by using an iterative approach, but that possible improvements are limited by the accuracy of the forward model absorption coefficients and errors in the brightness temperature measurements. Each of these effects limits the

337

A Surprising Path for Proton Transfer Without Hydrogen Bonds  

NLE Websites -- All DOE Office Websites (Extended Search)

A Surprising Path for Proton Transfer Without Hydrogen Bonds Print A Surprising Path for Proton Transfer Without Hydrogen Bonds Print Hydrogen bonds are found everywhere in chemistry and biology and are critical in DNA and RNA. A hydrogen bond results from the attractive dipolar interaction of a chemical group containing a hydrogen atom with a group containing an electronegative atom, such as nitrogen, oxygen, or fluorine, in the same or a different molecule. Conventional wisdom has it that proton transfer from one molecule to another can only happen via hydrogen bonds. Recently, a team of Berkeley Lab and University of Southern California researchers, using the ALS, discovered to their surprise that in some cases, protons can find ways to transfer even when hydrogen bonds are blocked. Sometimes You Have to

338

Honea Path, South Carolina: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Honea Path, South Carolina: Energy Resources Honea Path, South Carolina: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 34.4465018°, -82.3915121° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.4465018,"lon":-82.3915121,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

339

Two Paths to Transforming Markets through Public Sector Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

Paths to Transforming Markets through Public Sector Energy Paths to Transforming Markets through Public Sector Energy Efficiency: Bottom Up versus Top Down Laura Van Wie McGrory, Philip Coleman, David Fridley, and Jeffrey Harris, Lawrence Berkeley National Laboratory (LBNL) Edgar Villaseñor Franco, Promoting an Energy-efficient Public Sector (PEPS) ABSTRACT The evolution of government purchasing initiatives in Mexico and China, part of the PEPS (Promoting an Energy-efficient Public Sector) program, demonstrates the need for flexibility in designing energy-efficiency strategies in the public sector. Several years of pursuing a top-down (federally led) strategy in Mexico produced few results, and it was not until the program was restructured in 2004 to focus on municipal-level purchasing that the program

340

The Data Vortex, an All Optical Path Multicomputer Interconnection Network  

E-Print Network (OSTI)

All optical path interconnection networks employing dense wavelength division multiplexing can provide vast improvements in supercomputer performance. However, the lack of efficient optical buffering requires investigation of new topologies and routing techniques. This paper introduces and evaluates the Data Vortex optical switching architecture which uses cylindrical routing paths as a packet buffering alternative. In addition, the impact of the number of angles on the overall network performance is studied through simulation. Using optimal topology configurations, the Data Vortex is compared to two existing switching architectures—butterfly and omega networks. The three networks are compared in terms of throughput, accepted traffic ratio, and average packet latency. The Data Vortex is shown to exhibit comparable latency and a higher acceptance rate (2x at 50 percent load) than the butterfly and omega topologies.

Cory Hawkins; Benjamin A. Small; D. Scott Wills; Keren Bergman

2007-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" from the National Library of EnergyBeta (NLEBeta).
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341

Gas-path leakage seal for a turbine  

DOE Patents (OSTI)

A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a turbine (such as combustor casing segments of a gas turbine). The seal includes a flexible and generally imperforate metal sheet assemblage having opposing first and second surfaces and two opposing raised edges extending a generally identical distance above and below the surfaces. A first cloth layer assemblage has a thickness generally equal to the previously-defined identical distance and is superimposed on the first surface between the raised edges. A second cloth layer assemblage is generally identical to the first cloth layer assemblage and is superimposed on the second surface between the raised edges. 5 figs.

Bagepalli, B.S.; Aksit, M.F.; Farrell, T.R.

1999-08-10T23:59:59.000Z

342

Gas-path leakage seal for a turbine  

SciTech Connect

A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a turbine (such as combustor casing segments of a gas turbine). The seal includes a flexible and generally imperforate metal sheet assemblage having opposing first and second surfaces and two opposing raised edges extending a generally identical distance above and below the surfaces. A first cloth layer assemblage has a thickness generally equal to the previously-defined identical distance and is superimposed on the first surface between the raised edges. A second cloth layer assemblage is generally identical to the first cloth layer assemblage and is superimposed on the second surface between the raised edges.

Bagepalli, Bharat Sampathkumaran (Niskayuna, NY); Aksit, Mahmut Faruk (Troy, NY); Farrell, Thomas Raymond (Simpsonville, SC)

1999-01-01T23:59:59.000Z

343

A Surprising Path for Proton Transfer Without Hydrogen Bonds  

NLE Websites -- All DOE Office Websites (Extended Search)

A Surprising Path for Proton Transfer Without Hydrogen Bonds Print A Surprising Path for Proton Transfer Without Hydrogen Bonds Print Hydrogen bonds are found everywhere in chemistry and biology and are critical in DNA and RNA. A hydrogen bond results from the attractive dipolar interaction of a chemical group containing a hydrogen atom with a group containing an electronegative atom, such as nitrogen, oxygen, or fluorine, in the same or a different molecule. Conventional wisdom has it that proton transfer from one molecule to another can only happen via hydrogen bonds. Recently, a team of Berkeley Lab and University of Southern California researchers, using the ALS, discovered to their surprise that in some cases, protons can find ways to transfer even when hydrogen bonds are blocked. Sometimes You Have to

344

New Accelerator to Study Steps on the Path to Fusion  

NLE Websites -- All DOE Office Websites (Extended Search)

Accelerator Will Accelerator Will Study Steps on the Path to Fusion Power New Accelerator Will Study Steps on the Path to Fusion Power Unusual Machine Tailor-made to Examine Heavy-ion Fusion May 10, 2012 The accelerator, looking "downstream." In the foreground is the grounded cage th The accelerator, looking "downstream." In the foreground is the grounded cage that encloses the 150,000-volt injector. See more photos at http://newscenter.lbl.gov/news-releases/2012/05/08/ndcx-accelerator/ (Photo: Roy Kaltschmidt, LBNL) The Neutralized Drift Compression Experiment, NDCX-II has recently marked successful completion. Designed with the aid of computer simulations executed at NERSC, the accelerator was created to study warm dense matter, an important research field in itself and particularly relevant to nuclear

345

A Rigorous Path Integral Construction in any Dimension  

E-Print Network (OSTI)

We propose a new rigorous time-slicing construction of the phase space Path Integrals for propagators both in Quantum Mechanics and Quantum Field Theory for a fairly general class of quantum observables (e.g. the Schroedinger hamiltonians with smooth scalar potentials of any power growth). Moreover we allow time-dependent hamiltonians and a great variety of discretizations, in particular, the standard, Weyl, and normal ones.

Alexander Dynin

1998-02-11T23:59:59.000Z

346

Quantum Path Interference through Incoherent Motions in Multilevel Quantum Systems  

E-Print Network (OSTI)

Quantum path interferences or resonances in multilevel dissipative quantum systems play an important and intriguing role in the transport processes of nanoscale systems. Many previous minimalistic models used to describe the quantum path interference driven by incoherent fields are based on the approximations including the second order perturbation for the weak coupling limit, the ad-hoc choices of two-time correlation functions and $\\it{etc}$. On the other hand, the similar model to study the non-adiabatic molecular electronic excitation have been extensively developed and many efficient quantum molecular dynamics simulation schemes, such as the Ehrenfest scheme, have been proposed. In this paper, I aim to propose an unified model, extend the Ehrenfest scheme to study the interactions of system-light and system-phonon simultaneously and gain insight into and principles of the roles of quantum path interferences in the realistic molecular systems. I discuss how to derive the time-dependent stochastic Schr$\\ddot{o}$dinger equation from the Ehrenfest scheme as a foundation to discuss the detailed balance for the weak coupling limit and therefore the quantum correction in the Ehrenfest scheme. Different from the master equation technique, the Ehrenfest scheme doesn't need any specific assumptions about spectral densities and two time correlation functions. With simple open two-level and three-level quantum systems, I show the effect of the quantum path interference on the steady state populations. Currently I only focus on the role of the phonon thermal reservoir. The electromagnetic field (solar light) will be modeled as a thermal reservoir and discussed in detail in the future paper.

Xin Chen

2013-05-17T23:59:59.000Z

347

Convergence Characteristics of the Cumulant Expansion for Fourier Path Integrals  

E-Print Network (OSTI)

The cumulant representation of the Fourier path integral method is examined to determine the asymptotic convergence characteristics of the imaginary-time density matrix with respect to the number of path variables $N$ included. It is proved that when the cumulant expansion is truncated at order $p$, the asymptotic convergence rate of the density matrix behaves like $N^{-(2p+1)}$. The complex algebra associated with the proof is simplified by introducing a diagrammatic representation of the contributing terms along with an associated linked-cluster theorem. The cumulant terms at each order are expanded in a series such that the the asymptotic convergence rate is maintained without the need to calculate the full cumulant at order $p$. Using this truncated expansion of each cumulant at order $p$, the numerical cost in developing Fourier path integral expressions having convergence order $N^{-(2p+1)}$ is shown to be approximately linear in the number of required potential energy evaluations making the method promising for actual numerical implementation.

Sharif D. Kunikeev; David L. Freeman; J. D. Doll

2010-06-08T23:59:59.000Z

348

Dynamical paths and universality in continuous variables open systems  

E-Print Network (OSTI)

We address the dynamics of quantum correlations in continuous variable open systems and analyze the evolution of bipartite Gaussian states in independent noisy channels. In particular, upon introducing the notion of dynamical path through a suitable parametrization for symmetric states, we focus attention on phenomena that are common to Markovian and non-Markovian Gaussian maps under the assumptions of weak coupling and secular approximation. We found that the dynamical paths in the parameter space are universal, that is they do depend only on the initial state and on the effective temperature of the environment, with non Markovianity that manifests itself in the velocity of running over a given path. This phenomenon allows one to map non-Markovian processes onto Markovian ones and it may reduce the number of parameters needed to study a dynamical process, e.g. it may be exploited to build constants of motions valid for both Markovian and non-Markovian maps. Universality is also observed in the value of Gaussian discord at the separability threshold, which itself is a function of the sole initial conditions in the limit of high temperature. We also prove the existence of excluded regions in the parameter space, i.e. of sets of states which cannot be linked by any Gaussian dynamical map.

Andrea Cazzaniga; Sabrina Maniscalco; Stefano Olivares; Matteo G. A. Paris

2012-11-27T23:59:59.000Z

349

Scientists at ALS Find New Path to More Efficient Organic Solar...  

NLE Websites -- All DOE Office Websites (Extended Search)

Scientists at ALS Find New Path to More Efficient Organic Solar Cells Scientists at ALS Find New Path to More Efficient Organic Solar Cells Print Monday, 07 January 2013 00:00...

350

Deconstructing internet paths: an approach for AS-level detour route discovery  

Science Conference Proceedings (OSTI)

Detour paths provide overlay networks with improved performance and resilience. Finding good detour routes with methods that scale to millions of nodes is a challenging problem. We propose a novel approach for decentralised discovery of detour paths ...

Sing Wang Ho; Thom Haddow; Jonathan Ledlie; Moez Draief; Peter Pietzuch

2009-04-01T23:59:59.000Z

351

Assessing the impact of automated path planning aids in the maritime community  

E-Print Network (OSTI)

In the area of merchant maritime navigation, electronic charts are a relatively new tool. As a result, navigational path planning environments that allow users to manually enter a path onto an electronic chart are becoming ...

Buchin, Mariela E

2009-01-01T23:59:59.000Z

352

THE PATH OF CARBON IN PHOTOSYNTHESIS, XI THE ROLE OF GLYCOLIC ACID  

E-Print Network (OSTI)

PATH OF CARBON I N PHOTOSYNTHESIS, XI THEl ROLE OF GLYCOLICa TIE PATH OF CARBQM IN PHOTOSYNTHESIS, XI Lo Schou, A o A oCvhose observed i n C l O2 photosynthesis. A major reaction

Schou, L.; Benson, A.A.; Bassham, J.A.; Calvin, M.

1950-01-01T23:59:59.000Z

353

Discovery of the First Leaking Double-Shell Tank - Hanford Tank 241-AY-102  

SciTech Connect

A routine video inspection of the annulus region of double-shell tank 241-A Y-102 in August of 2012 indicated the presence material in the annulus space between the primary and secondary liners. A comparison was made to previous inspections perfom1ed in 2006 and 2007. which indicated that a change had occurred. The material was observed at two locations on the floor of the annulus and one location at the top of the annulus region where the primary and secondary top knuckles meet (RPP-ASMT-53793). Subsequent inspections were performed. leading to additional material observed on the floor of the annulus space in a region that had not previously been inspected (WRPS-PER-2012-1363). The annulus Continuous Air Monitor (CAM) was still operational and was not indicating elevated radiation levels in the annulus region. When the camera from the inspections was recovered. it also did not indicate increased radiation above minimum contamination levels (WRPS-PER-2012-1363). A formal leak assessment team was established August 10, 2012 to review tank 241-AY-102 construction and operating histories and to determine whether the material observed in the annulus had resulted from a leak in the primary tank. The team consisted of individuals from Engineering. Base Operations.and Environmental Protection. As this was a first-of-its-kind task. a method for obtaining a sample of the material in the annulus was needed. The consistency of the material was unknown.and the location of a majority of the material was not conducive to using the sampling devices that were currently available at Hanford. A subcontractor was tasked with the development fabrication.and testing of a sampling device that would be able to obtain multiple samples from the material on the annulus floor. as well as the material originating from a refractory air-slot near the floor of the annulus space. This sampler would need to be able to collect and dispense the material it collected into a sample jar retrieval device for transportation of the material to the 222-S laboratory on the Hanford site for analysis. The subcontractor agency fabricated a remote underground sampler by modifying off-the-shelf robotics and parts. Limited testing of the sampler was conducted using a mock-up of the tank annulus and one simulated material type -a salt block. The mock-up testing indicated that the sampler would be able to maneuver within the confined space and that the device worked with full functionality. A total of six weeks had passed from initiation to implementation of the new sampler in the 241-AY-102 tank annulus. Initial sample material was obtained from the annulus floor using the Off-Riser Sampler System that has been used at Hanford tor years to obtain material from the primary tanks. This could be used at the location near Riser 83 since the material was collected directly from the annulus floor and not from a location on the wall or behind a pipe, as was needed from the two locations near Riser 90. After obtaining a small sample of the material on the annulus floor.this sampler sustained terminal damage due to conduit pipes it had to transverse in order to collect and recover material from this location. Several issues were also encountered during deployment of the new sampler into the annulus near Riser 90. These included: • Difficulty fitting the sampler down the 12-inch riser into the annulus due to a small tolerance in the size ofthe sampler • Failure of sampler components and functions during deployment including the camera. pneumatics.and bearing seals • Delays in the field due to supporting equipment issues including cables. cameras. and scaffolding • Low recovery of sample material obtained for analysis The complications that occurred during deployment and use of the new sampler during the sampling event ultimately resulted in lower recovery of material from these locations in the annulus than was obtained using the Off-Riser Sampler System and limited the analyses that could be performed for determining the origin of the material. Following completion of th

Harrington, Stephanie J.; Sams, Terry L.

2013-08-15T23:59:59.000Z

354

Robot path generation method for a welding system based on pseudo stereo visual servo control  

Science Conference Proceedings (OSTI)

A path generation method for robot-based welding systems is proposed. The method that is a modification of the method "teaching by showing" is supported by the recently developed pseudo stereovision system (PSVS). A path is generated by means of the ... Keywords: calibration, complex image, path generation, pseudo stereovision system, robotic application humanPT, target-object

Theodore P. Pachidis; Kostas N. Tarchanidis; John N. Lygouras; Philippos G. Tsalides

2005-01-01T23:59:59.000Z

355

Possible connection between the optimal path and flow in percolation clusters Eduardo Lpez,1  

E-Print Network (OSTI)

path. We calculate the probability distribution P opt r,L of the optimal path length opt, and find the tracer path length tr of tracers inside percolation through their probability distribution P tr r,L . We in porous media related to second- ary oil extraction, in which an invading fluid water, steam, etc

Stanley, H. Eugene

356

Reaction paths and free energy profiles for conformational transitions: An internal coordinate approach  

E-Print Network (OSTI)

Reaction paths and free energy profiles for conformational transitions: An internal coordinate to study in Cartesian space. A procedure to obtain reaction paths and free energy profiles in solution is also proposed. The free energy profile along the path in solution is calculated utilizing a free energy

Lazaridis, Themis

357

From link dynamics to path lifetime and packet-length optimization in MANETs  

Science Conference Proceedings (OSTI)

We present an analytical framework and statistical models to accurately characterize the lifetime of a wireless link and multi-hop paths in mobile ad hoc networks (MANET). We show that the lifetimes of links and paths can be computed through a two-state ... Keywords: Analytical mobility modeling, Link dynamics, Markov model, Optimal information segmentation, Path lifetime

Xianren Wu; Hamid R. Sadjadpour; J. J. Garcia-Luna-Aceves

2009-07-01T23:59:59.000Z

358

A review of path planning and mapping technologies for autonomous mobile robot systems  

Science Conference Proceedings (OSTI)

This paper presents a review of various technologies for autonomous movement of a robot. Path planning is the process of generating a collision free path to the goal. Simultaneous Localization And Mapping (SLAM) is the process of creating a map of the ... Keywords: SLAM, anytime search algorithm, hippocampus, hybrid map, incremental search algorithm, localization, mapping, path planning, topological map

Nitin Kumar Dhiman; Dipti Deodhare; Deepak Khemani

2012-01-01T23:59:59.000Z

359

Complexity results on labeled shortest path problems from wireless routing metrics  

Science Conference Proceedings (OSTI)

Metrics to assess the cost of paths through networks are critical to ensuring the efficiency of network routing. This is particularly true in multi-radio multi-hop wireless networks. Effective metrics for these networks must measure the cost of a wireless ... Keywords: Approximation algorithms, Labeled paths, Shortest paths, Wireless routing metrics

Charles B. Ward; Nathan M. Wiegand

2010-02-01T23:59:59.000Z

360

Bayesian hierarchical models for soil CO{sub 2} flux and leak detection at geologic sequestration sites  

Science Conference Proceedings (OSTI)

Proper characterizations of background soil CO{sub 2} respiration rates are critical for interpreting CO{sub 2} leakage monitoring results at geologic sequestration sites. In this paper, a method is developed for determining temperature-dependent critical values of soil CO{sub 2} flux for preliminary leak detection inference. The method is illustrated using surface CO{sub 2} flux measurements obtained from the AmeriFlux network fit with alternative models for the soil CO{sub 2} flux versus soil temperature relationship. The models are fit first to determine pooled parameter estimates across the sites, then using a Bayesian hierarchical method to obtain both global and site-specific parameter estimates. Model comparisons are made using the deviance information criterion (DIC), which considers both goodness of fit and model complexity. The hierarchical models consistently outperform the corresponding pooled models, demonstrating the need for site-specific data and estimates when determining relationships for background soil respiration. A hierarchical model that relates the square root of the CO{sub 2} flux to a quadratic function of soil temperature is found to provide the best fit for the AmeriFlux sites among the models tested. This model also yields effective prediction intervals, consistent with the upper envelope of the flux data across the modeled sites and temperature ranges. Calculation of upper prediction intervals using the proposed method can provide a basis for setting critical values in CO{sub 2} leak detection monitoring at sequestration sites.

Yang, Ya-Mei; Small, Mitchell J.; Junker, Brian; Bromhal, Grant S.; Strazisar, Brian; Wells, Arthur

2011-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Intercooler flow path for gas turbines: CFD design and experiments  

DOE Green Energy (OSTI)

The Advanced Turbine Systems (ATS) program was created by the U.S. Department of Energy to develop ultra-high efficiency, environmentally superior, and cost competitive gas turbine systems for generating electricity. Intercooling or cooling of air between compressor stages is a feature under consideration in advanced cycles for the ATS. Intercooling entails cooling of air between the low pressure (LP) and high pressure (HP) compressor sections of the gas turbine. Lower air temperature entering the HP compressor decreases the air volume flow rate and hence, the compression work. Intercooling also lowers temperature at the HP discharge, thus allowing for more effective use of cooling air in the hot gas flow path.

Agrawal, A.K.; Gollahalli, S.R.; Carter, F.L. [Univ. of Oklahoma, Norman, OK (United States)] [and others

1995-12-31T23:59:59.000Z

362

DOE EM Landfill Workshop and Path Forward - July 2009  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Teleconference: Teleconference: 2. DOE EM Landfill Workshop & Path Forward Office of Groundwater and Soil Remediation US Department of Energy July 2009 Slides prepared by CRESP DOE EM Landfill Workshop 2 Objective: - Discuss findings & recommendations from ITR visits to DOE facilities - Identify technology gaps and needs to advance EM disposal practice of the future. - Obtain input from experts within and outside of DOE. Panels: Waste subsidence: prediction and impacts Waste forecasting: predicting volumes and WACs Final covers: long-term performance and monitoring Liners: role and need Workshop Approach and Structure * Objective: - Discuss each issue - Evaluate the merits of each issue - Create a prioritized list of technologies needs for Office of

363

TOPIC Brief BUILDING TECHNOLOGIES PROGRAM Choosing an Energy Code Compliance Path TOPIC BRIEF 1  

NLE Websites -- All DOE Office Websites (Extended Search)

Choosing an Energy Code Compliance Path TOPIC BRIEF 1 Choosing an Energy Code Compliance Path TOPIC BRIEF 1 Choosing an Energy Code Compliance Path One challenge that awaits any building designer is choosing the appropriate compliance path through the applicable building energy code. This is not a trivial decision-energy codes are marvels of flexibility, offering multiple compliance paths to suit all types of designers. E ach path has its own pluses and minuses, which may include differences in stringency, complexity, and potentially even limitations on building designs. This topic brief focuses on the compliance paths that are available in the following model codes and standards: * 2009 International Energy Conservation Code (IECC) and 2012

364

Step 2. Identify the Code and Compliance Path | Building Energy Codes  

NLE Websites -- All DOE Office Websites (Extended Search)

2. Identify the Code and Compliance Path 2. Identify the Code and Compliance Path It is important to review the submitted documentation and identify which code was used for the building. Next, to determine whether the building complies with that code, the path used to demonstrate compliance must be identified. There are several compliance paths available in the 2009 and 2012 IECC and ASHRAE Standards 90.1-2007 and 90.1-2010. Each of these codes/standards contains a prescriptive path that clearly states specific requirements. Prescriptive paths limit design freedom. Each of these codes/standards also has a performance-based path that provides more design freedom and can lead to innovative design, but involves more complex energy simulations and tradeoffs between systems. Residential and smaller commercial buildings

365

RAPIDD Gives ALS Users a Faster Path to Beam Time  

NLE Websites -- All DOE Office Websites (Extended Search)

RAPIDD Gives ALS Users a Faster RAPIDD Gives ALS Users a Faster Path to Beam Time RAPIDD Gives ALS Users a Faster Path to Beam Time Print Monday, 28 October 2013 08:31 ALS users are invited to check out our web pages detailing our new RAPIDD proposal process. This combined process for Rapid Access Proposals, Industry, and Director's Discretion beam time accommodates users who require limited but rapid access to the ALS. Proposals may be submitted at any time. RAPIDD complements the existing six-month General User Proposal process, which remains the access mechanism of choice for users who require significant beam time for an extended program of research, or for those wanting to perform complex experiments involving setup or reorganization of equipment at a beamline. The ALS structural biology community has been using RAPIDD for a year, with 160 proposals receiving beam time in that period. As of July 2013, RAPIDD access was extended to beamlines 7.3.3 (SAXS/WAXS), 8.3.2 (microtomography) and 11.3.1 (small molecule crystallography) and to users from industrial groups.

366

Self-Adjusting Networks to Minimize Expected Path Length  

E-Print Network (OSTI)

Given a network infrastructure (e.g., a grid, data-center or on-chip-network) and a distribution on the source-destination requests, the expected path (route) length is an important measure for the performance, efficiency and power consumption of the network. In this work we initiate a study on self-adjusting networks: networks that use local-distributed mechanisms to adjust the position of the nodes in the network to any distribution of route requests. Finding the optimal placement of nodes is defined as the minimum expected path length (MEPL) problem. While, as we show, the MEPL problem is NP-hard to solve exactly in general we give efficient and simple approximation algorithms for interesting and practically relevant special cases of the problem. E.g., we consider grid networks in which the distribution of requests is a symmetric product distribution. In this setting we show that simple greedy switches, which locally minimize an objective function, achieve good approximation ratios. We are able to prove th...

Avin, Chen; Haeupler, Bernhard; Lotker, Zvi

2011-01-01T23:59:59.000Z

367

Gas-path leakage seal for a gas turbine  

DOE Patents (OSTI)

A gas-path leakage seal for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a gas turbine (such as combustor casing segments). The seal includes a generally imperforate foil-layer assemblage which is generally impervious to gas and is located in the leakage-gap. The seal also includes a cloth-layer assemblage generally enclosingly contacting the foil-layer assemblage. In one seal, the first edge of the foil-layer assemblage is left exposed, and the foil-layer assemblage resiliently contacts the first member near the first edge to reduce leakage in the "plane" of the cloth-layer assemblage under conditions which include differential thermal growth of the two members. In another seal, such leakage is reduced by having a first weld-bead which permeates the cloth-layer assemblage, is attached to the metal-foil-layer assemblage near the first edge, and unattachedly contacts the first member.

Wolfe, Christopher E. (Schenectady, NY); Dinc, Osman S. (Troy, NY); Bagepalli, Bharat S. (Schenectady, NY); Correia, Victor H. (New Lebanon, NY); Aksit, Mahmut F. (Troy, NY)

1996-01-01T23:59:59.000Z

368

Gas-path leakage seal for a gas turbine  

DOE Patents (OSTI)

A gas-path leakage seal is described for generally sealing a gas-path leakage-gap between spaced-apart first and second members of a gas turbine (such as combustor casing segments). The seal includes a generally imperforate foil-layer assemblage which is generally impervious to gas and is located in the leakage-gap. The seal also includes a cloth-layer assemblage generally enclosingly contacting the foil-layer assemblage. In one seal, the first edge of the foil-layer assemblage is left exposed, and the foil-layer assemblage resiliently contacts the first member near the first edge to reduce leakage in the ``plane`` of the cloth-layer assemblage under conditions which include differential thermal growth of the two members. In another seal, such leakage is reduced by having a first weld-bead which permeates the cloth-layer assemblage, is attached to the metal-foil-layer assemblage near the first edge, and unattachedly contacts the first member. 4 figs.

Wolfe, C.E.; Dinc, O.S.; Bagepalli, B.S.; Correia, V.H.; Aksit, M.F.

1996-04-23T23:59:59.000Z

369

On models of nonlinear evolution paths in adiabatic quantum algorithms  

E-Print Network (OSTI)

In this paper, we study two different nonlinear interpolating paths in adiabatic evolution algorithms for solving a particular class of quantum search problems where both the initial and final Hamiltonian are one-dimensional projector Hamiltonians on the corresponding ground state. If the overlap between the initial state and final state of the quantum system is not equal to zero, both of these models can provide a constant time speedup over the usual adiabatic algorithms by increasing some another corresponding "complexity". But when the initial state has a zero overlap with the solution state in the problem, the second model leads to an infinite time complexity of the algorithm for whatever interpolating functions being applied while the first one can still provide a constant running time. However, inspired by a related reference, a variant of the first model can be constructed which also fails for the problem when the overlap is exactly equal to zero if we want to make up the "intrinsic" fault of the second model-an increase in energy. Two concrete theorems are given to serve as explanations why neither of these two models can improve the usual adiabatic evolution algorithms for the phenomenon above. These just tell us what should be noted when using certain nonlinear evolution paths in adiabatic quantum algorithms for some special kind of problems.

Jie Sun; Songfeng Lu; Samuel L. Braunstein

2013-01-07T23:59:59.000Z

370

Analysis of Underground Storage Tanks System Materials to Increased Leak Potential Associated with E15 Fuel  

DOE Green Energy (OSTI)

The Energy Independence and Security Act (EISA) of 2007 was enacted by Congress to move the nation toward increased energy independence by increasing the production of renewable fuels to meet its transportation energy needs. The law establishes a new renewable fuel standard (RFS) that requires the nation to use 36 billion gallons annually (2.3 million barrels per day) of renewable fuel in its vehicles by 2022. Ethanol is the most widely used renewable fuel in the US, and its production has grown dramatically over the past decade. According to EISA and RFS, ethanol (produced from corn as well as cellulosic feedstocks) will make up the vast majority of the new renewable fuel requirements. However, ethanol use limited to E10 and E85 (in the case of flex fuel vehicles or FFVs) will not meet this target. Even if all of the E0 gasoline dispensers in the country were converted to E10, such sales would represent only about 15 billion gallons per year. If 15% ethanol, rather than 10% were used, the potential would be up to 22 billion gallons. The vast majority of ethanol used in the United States is blended with gasoline to create E10, that is, gasoline with up to 10% ethanol. The remaining ethanol is sold in the form of E85, a gasoline blend with as much as 85% ethanol that can only be used in FFVs. Although DOE remains committed to expanding the E85 infrastructure, that market will not be able to absorb projected volumes of ethanol in the near term. Given this reality, DOE and others have begun assessing the viability of using intermediate ethanol blends as one way to transition to higher volumes of ethanol. In October of 2010, the EPA granted a partial waiver to the Clean Air Act allowing the use of fuel that contains up to 15% ethanol for the model year 2007 and newer light-duty motor vehicles. This waiver represents the first of a number of actions that are needed to move toward the commercialization of E15 gasoline blends. On January 2011, this waiver was expanded to include model year 2001 light-duty vehicles, but specifically prohibited use in motorcycles and off-road vehicles and equipment. UST stakeholders generally consider fueling infrastructure materials designed for use with E0 to be adequate for use with E10, and there are no known instances of major leaks or failures directly attributable to ethanol use. It is conceivable that many compatibility issues, including accelerated corrosion, do arise and are corrected onsite and, therefore do not lead to a release. However, there is some concern that higher ethanol concentrations, such as E15 or E20, may be incompatible with current materials used in standard gasoline fueling hardware. In the summer of 2008, DOE recognized the need to assess the impact of intermediate blends of ethanol on the fueling infrastructure, specifically located at the fueling station. This includes the dispenser and hanging hardware, the underground storage tank, and associated piping. The DOE program has been co-led and funded by the Office of the Biomass Program and Vehicle Technologies Program with technical expertise from the Oak Ridge National Laboratory (ORNL) and the National Renewable Energy Laboratory (NREL). The infrastructure material compatibility work has been supported through strong collaborations and testing at Underwriters Laboratories (UL). ORNL performed a compatibility study investigating the compatibility of fuel infrastructure materials to gasoline containing intermediate levels of ethanol. These results can be found in the ORNL report entitled Intermediate Ethanol Blends Infrastructure Materials Compatibility Study: Elastomers, Metals and Sealants (hereafter referred to as the ORNL intermediate blends material compatibility study). These materials included elastomers, plastics, metals and sealants typically found in fuel dispenser infrastructure. The test fuels evaluated in the ORNL study were SAE standard test fuel formulations used to assess material-fuel compatibility within a relatively short timeframe. Initially, these material studies included test fuels of Fuel C,

Kass, Michael D [ORNL; Theiss, Timothy J [ORNL; Janke, Christopher James [ORNL; Pawel, Steven J [ORNL

2012-07-01T23:59:59.000Z

371

Analysis of Underground Storage Tanks System Materials to Increased Leak Potential Associated with E15 Fuel  

Science Conference Proceedings (OSTI)

The Energy Independence and Security Act (EISA) of 2007 was enacted by Congress to move the nation toward increased energy independence by increasing the production of renewable fuels to meet its transportation energy needs. The law establishes a new renewable fuel standard (RFS) that requires the nation to use 36 billion gallons annually (2.3 million barrels per day) of renewable fuel in its vehicles by 2022. Ethanol is the most widely used renewable fuel in the US, and its production has grown dramatically over the past decade. According to EISA and RFS, ethanol (produced from corn as well as cellulosic feedstocks) will make up the vast majority of the new renewable fuel requirements. However, ethanol use limited to E10 and E85 (in the case of flex fuel vehicles or FFVs) will not meet this target. Even if all of the E0 gasoline dispensers in the country were converted to E10, such sales would represent only about 15 billion gallons per year. If 15% ethanol, rather than 10% were used, the potential would be up to 22 billion gallons. The vast majority of ethanol used in the United States is blended with gasoline to create E10, that is, gasoline with up to 10% ethanol. The remaining ethanol is sold in the form of E85, a gasoline blend with as much as 85% ethanol that can only be used in FFVs. Although DOE remains committed to expanding the E85 infrastructure, that market will not be able to absorb projected volumes of ethanol in the near term. Given this reality, DOE and others have begun assessing the viability of using intermediate ethanol blends as one way to transition to higher volumes of ethanol. In October of 2010, the EPA granted a partial waiver to the Clean Air Act allowing the use of fuel that contains up to 15% ethanol for the model year 2007 and newer light-duty motor vehicles. This waiver represents the first of a number of actions that are needed to move toward the commercialization of E15 gasoline blends. On January 2011, this waiver was expanded to include model year 2001 light-duty vehicles, but specifically prohibited use in motorcycles and off-road vehicles and equipment. UST stakeholders generally consider fueling infrastructure materials designed for use with E0 to be adequate for use with E10, and there are no known instances of major leaks or failures directly attributable to ethanol use. It is conceivable that many compatibility issues, including accelerated corrosion, do arise and are corrected onsite and, therefore do not lead to a release. However, there is some concern that higher ethanol concentrations, such as E15 or E20, may be incompatible with current materials used in standard gasoline fueling hardware. In the summer of 2008, DOE recognized the need to assess the impact of intermediate blends of ethanol on the fueling infrastructure, specifically located at the fueling station. This includes the dispenser and hanging hardware, the underground storage tank, and associated piping. The DOE program has been co-led and funded by the Office of the Biomass Program and Vehicle Technologies Program with technical expertise from the Oak Ridge National Laboratory (ORNL) and the National Renewable Energy Laboratory (NREL). The infrastructure material compatibility work has been supported through strong collaborations and testing at Underwriters Laboratories (UL). ORNL performed a compatibility study investigating the compatibility of fuel infrastructure materials to gasoline containing intermediate levels of ethanol. These results can be found in the ORNL report entitled Intermediate Ethanol Blends Infrastructure Materials Compatibility Study: Elastomers, Metals and Sealants (hereafter referred to as the ORNL intermediate blends material compatibility study). These materials included elastomers, plastics, metals and sealants typically found in fuel dispenser infrastructure. The test fuels evaluated in the ORNL study were SAE standard test fuel formulations used to assess material-fuel compatibility within a relatively short timeframe. Initially, these material studies included test fuels of Fuel C,

Kass, Michael D [ORNL; Theiss, Timothy J [ORNL; Janke, Christopher James [ORNL; Pawel, Steven J [ORNL

2012-07-01T23:59:59.000Z

372

Double-Shell Tank Visual Inspection Changes REsulting from the Tank 241-AY-102 Primary Tank Leak - 14193  

SciTech Connect

As part of the Double-Shell Tank (DST) Integrity Program, remote visual inspections are utilized to perform qualitative in-service inspections of the DSTs in order to provide a general overview of the condition of the tanks. During routine visual inspections of tank 241-AY -1 02 (A Y -1 02) in August 2012, anomalies were identified on the annulus floor which resulted in further evaluations. In October 2012, Washington River Protection Solutions, LLC determined that the primary tank of AY -102 was leaking. Following identification of the tank AY-102 probable leak cause, evaluations considered the adequacy of the existing annulus inspection frequency with respect to the circumstances of the tank AY-1021eak and the advancing age of the DST structures. The evaluations concluded that the interval between annulus inspections should be shortened for all DSTs, and each annulus inspection should cover > 95 percent of annulus floor area, and the portion of the primary tank (i.e., dome, sidewall, lower knuckle, and insulating refractory) that is visible from the annulus inspection risers. In March 2013, enhanced visual inspections were performed for the six oldest tanks: 241-AY-101, 241-AZ-101,241-AZ-102, 241-SY-101, 241-SY-102, and 241-SY-103, and no evidence of leakage from the primary tank were observed. Prior to October 2012, the approach for conducting visual examinations of DSTs was to perform a video examination of each tank's interior and annulus regions approximately every five years (not to exceed seven years between inspections). Also, the annulus inspection only covered about 42 percent of the annulus floor.

Girardot, Crystal L.; Washenfelder, Dennis J.; Johnson, Jeremy M.; Engeman, Jason K.

2013-11-14T23:59:59.000Z

373

Quantum Calisthenics: Gaussians, The Path Integral and Guided Numerical Approximations  

SciTech Connect

It is apparent to anyone who thinks about it that, to a large degree, the basic concepts of Newtonian physics are quite intuitive, but quantum mechanics is not. My purpose in this talk is to introduce you to a new, much more intuitive way to understand how quantum mechanics works. I begin with an incredibly easy way to derive the time evolution of a Gaussian wave-packet for the case free and harmonic motion without any need to know the eigenstates of the Hamiltonian. This discussion is completely analytic and I will later use it to relate the solution for the behavior of the Gaussian packet to the Feynman path-integral and stationary phase approximation. It will be clear that using the information about the evolution of the Gaussian in this way goes far beyond what the stationary phase approximation tells us. Next, I introduce the concept of the bucket brigade approach to dealing with problems that cannot be handled totally analytically. This approach combines the intuition obtained in the initial discussion, as well as the intuition obtained from the path-integral, with simple numerical tools. My goal is to show that, for any specific process, there is a simple Hilbert space interpretation of the stationary phase approximation. I will then argue that, from the point of view of numerical approximations, the trajectory obtained from my generalization of the stationary phase approximation specifies that subspace of the full Hilbert space that is needed to compute the time evolution of the particular state under the full Hamiltonian. The prescription I will give is totally non-perturbative and we will see, by the grace of Maple animations computed for the case of the anharmonic oscillator Hamiltonian, that this approach allows surprisingly accurate computations to be performed with very little work. I think of this approach to the path-integral as defining what I call a guided numerical approximation scheme. After the discussion of the anharmonic oscillator I will turn to tunneling problems and show that the instanton can also be though of in the same way. I will do this for the classic problem of a double well potential in the extreme limit when the splitting between the two lowest levels is extremely small and the tunneling rate from one well to another is also very small.

Weinstein, Marvin; /SLAC

2009-02-12T23:59:59.000Z

374

Two Paths to Transforming Markets through Public Sector Energy Efficiency:  

NLE Websites -- All DOE Office Websites (Extended Search)

Two Paths to Transforming Markets through Public Sector Energy Efficiency: Two Paths to Transforming Markets through Public Sector Energy Efficiency: Bottom Up versus Top Down Title Two Paths to Transforming Markets through Public Sector Energy Efficiency: Bottom Up versus Top Down Publication Type Conference Paper LBNL Report Number LBNL-60144 Year of Publication 2006 Authors McGrory, Laura Van Wie, Philip Coleman, David Fridley, Jeffrey P. Harris, and Edgar Villasenor Franco Conference Name 2006 ACEEE Summer Study on Energy Efficiency in Buildings Date Published 08/2006 Conference Location Pacific Grove, CA Abstract The evolution of government purchasing initiatives in Mexico and China, part of the PEPS (Promoting an Energy-efficient Public Sector) program, demonstrates the need for flexibility in designing energy-efficiency strategies in the public sector. Several years of pursuing a top-down (federally led) strategy in Mexico produced few results, and it was not until the program was restructured in 2004 to focus on municipal-level purchasing that the program gained momentum. Today, a new partnership with the Mexican federal government is leading to an intergovernmental initiative with strong support at the federal level. By contrast, the PEPS purchasing initiative in China was successfully initiated and led at the central government level with strategic support from international experts. The very different success trajectories in these two countries provide valuable lessons for designing country-specific public sector energy-efficiency initiatives. Enabling conditions for any successful public sector purchasing initiative include the existence of mandatory energy-efficiency performance standards, an effective energy-efficiency endorsement labeling program, an immediate need for energy conservation, a simple pilot phase (focusing on a limited number of strategically chosen products), and specialized technical assistance. Top-down purchasing programs are likely to be more successful where there is high-level political endorsement and a national procurement law in place, supported by a network of trained purchasers. Bottom-up (municipally led) purchasing programs require that municipalities have the authority to set their own purchasing policies, and also benefit from existing networks of cities, supported by motivated municipal leaders and trained purchasing officials.

375

Component-wise method of smoothing the curvature of spatial paths constructed by noisy measurements in robot motion planning problems  

Science Conference Proceedings (OSTI)

A motion planning problem for a robot is considered. A robot follows a path in the manual mode and path coordinates are measured by a GNSS receiver. Repeating this path in the automatic mode requires constructing a geometric path that satisfies certain ...

R. F. Gilimyanov

2013-05-01T23:59:59.000Z

376

LANL achieves milestone on path to zero wastewater discharge  

NLE Websites -- All DOE Office Websites (Extended Search)

LANL achieves milestone on wastewater discharge LANL achieves milestone on wastewater discharge LANL achieves milestone on path to zero wastewater discharge Industrial wastewater will be recycled as the result of a long-term strategy to treat wastewater rather than discharging it into the environment. January 20, 2012 Aerial view of Los Alamos National Laboratory Aerial view of Los Alamos National Laboratory. Contact Colleen Curran Communications Office (505) 664-0344 Email Improved compliance while recycling millions of gallons of industrial wastewater LOS ALAMOS, New Mexico, January 20, 2012-Millions of gallons of industrial wastewater will be recycled at Los Alamos National Laboratory as the result of a long-term strategy to treat wastewater rather than discharging it into the environment. The U. S. Environmental Protection Agency, which issues permits for

377

Critical Path-Based Thread Placement for NUMA Systems  

Science Conference Proceedings (OSTI)

Multicore multiprocessors use Non Uniform Memory Architecture (NUMA) to improve their scalability. However,NUMA introduces performance penalties due to remote memory accesses. Without efficiently managing data layout and thread mapping to cores, scientific applications, even if they are optimized for NUMA, may suffer performance loss. In this paper, we present an algorithm that optimizes the placement of OpenMP threads on NUMA processors. By collecting information from hardware counters and defining new metrics to capture the effects of thread placement, the algorithm reduces NUMA performance penalty by minimizing the critical path of OpenMP parallel regions and by avoiding local memory resource contention. We evaluate our algorithm with NPB benchmarks and achieve performance improvement between 8.13% and 25.68%, compared to the OS default scheduling.

Su, Chun-Yi [Virginia Polytechnic Institute and State University (Virginia Tech); Li, Dong [ORNL; Nikolopoulos, Dimitrios [FORTH-ICS; Grove, Matthew [Virginia Polytechnic Institute and State University (Virginia Tech); Cameron, Kirk W. [Virginia Polytechnic Institute and State University (Virginia Tech); de Supinski, Bronis R. [Lawrence Livermore National Laboratory (LLNL)

2012-01-01T23:59:59.000Z

378

A Path to Successful Energy Retrofits: Early Collaboration Through  

NLE Websites -- All DOE Office Websites (Extended Search)

Through Through Integrated Project Delivery Teams Title A Path to Successful Energy Retrofits: Early Collaboration Through Integrated Project Delivery Teams Publication Type Report Refereed Designation Refereed LBNL Report Number LBNL-6130E Year of Publication 2012 Authors Parrish, Kristen Date Published 10/2012 Publisher Lawrence Berkeley National Laboratory Abstract This document guides you through a process for the early design phases of retrofit projects to help you mitigate frustrations commonly experienced by building owners and designers. It outlines the value of forming an integrated project delivery team and developing a communication and information-sharing infrastructure that fosters collaboration. This guide does not present a complete process for designing an energy retrofit for a building. Instead, it focuses on the early design phase tasks related to developing and selecting energy efficiency measures (EEMs) that benefit from collaboration, and highlights the resulting advantages.

379

Light absorption cell combining variable path and length pump  

DOE Patents (OSTI)

This invention is comprised of a device for use in making spectrophotometric measurements of fluid samples. In particular, the device is a measurement cell containing a movable and a fixed lens with a sample of the fluid therebetween and through which light shines. The cell is connected to a source of light and a spectrophotometer via optic fibers. Movement of the lens varies the path length and also pumps the fluid into and out of the cell. Unidirectional inlet and exit valves cooperate with the movable lens to assure a one-way flow of fluid through the cell. A linear stepper motor controls the movement of the lens and cycles it from a first position closer to the fixed lens and a second position farther from the fixed lens, preferably at least 10 times per minute for a nearly continuous stream of absorption spectrum data.

Prather, W.S.

1992-12-31T23:59:59.000Z

380

Path-integral simulations of hydrogen and hydrogen plasmas  

DOE Green Energy (OSTI)

Feynman path-integral simulations of a system consisting of protons and distinguishable electrons under periodic boundary conditions are presented with the aim of calculating the phase diagram of hydrogen at various temperatures and densities. For a two-electron--two-proton system, for which Fermi statistics can be ignored, the equations of state and the radial distribution functions are obtained, including the effects of temperature and pressure ionization, for temperatures down to 0.68 eV and densities up to 1 g cm{sup {minus}3}. These results are compared to other models. Systems with more than two distinguishable electrons are found to be thermodynamically unstable, by collapsing into a cluster at low temperature, suggesting that further simulations be used to investigate the stability of Boltzmann matter.

Theilhaber, J.; Alder, B.J. (Lawrence Livermore National Laboratory, P.O. Box 808, Livermore, California 94550 (US))

1991-04-15T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Long-length contaminated equipment disposal process path document  

Science Conference Proceedings (OSTI)

The first objective of the LLCE Process Path Document is to guide future users of this system on how to accomplish the cradle-to-grave process for the disposal of long-length equipment. Information will be provided describing the function and approach to each step in the process. Pertinent documentation, prerequisites, drawings, procedures, hardware, software, and key interfacing organizations will be identified. The second objective is related to the decision to lay up the program until funding is made available to complete it or until a need arises due to failure of an important component in a waste tank. To this end, the document will identify work remaining to be completed for each step of the process and open items or issues that remain to be resolved.

McCormick, W.A.

1998-09-30T23:59:59.000Z

382

A Success Path from Process R&D to Commercial Plants  

Science Conference Proceedings (OSTI)

Abstract Scope, The path from process conception to commercial ... Energy Recovery from High Temperature Steel, Copper and Nickel Smelter Slags · Impact of ...

383

Long Term World Oil Supply (A Resource Base/Production Path ...  

U.S. Energy Information Administration (EIA)

Table of Contents. Long Term World Oil Supply (A Resource Base/Production Path Analysis) Executive Summary. Executive Summary (Continued) Executive ...

384

Path Forward to Design and Implement an On-going Engineering Management Handbook.  

E-Print Network (OSTI)

??The purpose of this thesis was to determine a path forward to design and implement an on-going Engineering Management Handbook. A review was performed to… (more)

Kring, Robert B

2008-01-01T23:59:59.000Z

385

Policy Strategies and Paths to promote Sustainable Energy Systems - The dynamic Invert Simulation Tool  

E-Print Network (OSTI)

Schemes for sustainable energy systems”. InternationalPaths to promote Sustainable Energy Systems - The dynamicmoney - for promoting sustainable energy systems - be spent

Stadler, Michael; Kranzl, Lukas; Huber, Claus; Haas, Reinhard; Tsioliaridou, Elena

2006-01-01T23:59:59.000Z

386

Characterization of the limit point of the central path in semidefinite ...  

E-Print Network (OSTI)

Path-following methods. In H. Wolkowicz, R. Saigal, and L. Van-. denberghe, editors, Handbook of Semide nite Programming, pages 267{306. Kluwer Academic.

387

The Path of Carbon in Photosynthesis. XVIII The Identification of Nucleotide Coenzymes  

E-Print Network (OSTI)

TIU PATH OF CARBON IN PHOTOSYNTHESIS, XBIII ~m ~IUIFIGATIONof the products of photosynthesis, a dark area appeared in aabout 30 seconds of normal photosynthesis by all the plants

Buchanan, J.G.; Lynch, V.H.; Benson, A.A.; Calvin, M.; Bradley, D.F.

1953-01-01T23:59:59.000Z

388

The National Ignition Facility (NIF) A Path to Fusion Energy  

SciTech Connect

Fusion energy has long been considered a promising clean, nearly inexhaustible source of energy. Power production by fusion micro-explosions of inertial confinement fusion (ICF) targets has been a long term research goal since the invention of the first laser in 1960. The NIF is poised to take the next important step in the journey by beginning experiments researching ICF ignition. Ignition on NIF will be the culmination of over thirty years of ICF research on high-powered laser systems such as the Nova laser at LLNL and the OMEGA laser at the University of Rochester as well as smaller systems around the world. NIF is a 192 beam Nd-glass laser facility at LLNL that is more than 90% complete. The first cluster of 48 beams is operational in the laser bay, the second cluster is now being commissioned, and the beam path to the target chamber is being installed. The Project will be completed in 2009 and ignition experiments will start in 2010. When completed NIF will produce up to 1.8 MJ of 0.35 {micro}m light in highly shaped pulses required for ignition. It will have beam stability and control to higher precision than any other laser fusion facility. Experiments using one of the beams of NIF have demonstrated that NIF can meet its beam performance goals. The National Ignition Campaign (NIC) has been established to manage the ignition effort on NIF. NIC has all of the research and development required to execute the ignition plan and to develop NIF into a fully operational facility. NIF will explore the ignition space, including direct drive, 2{omega} ignition, and fast ignition, to optimize target efficiency for developing fusion as an energy source. In addition to efficient target performance, fusion energy requires significant advances in high repetition rate lasers and fusion reactor technology. The Mercury laser at LLNL is a high repetition rate Nd-glass laser for fusion energy driver development. Mercury uses state-o-the art technology such as ceramic laser slabs and light diode pumping for improved efficiency and thermal management. Progress in NIF, NIC, Mercury, and the path forward for fusion energy will be presented.

Moses, E

2006-11-27T23:59:59.000Z

389

On implementing provenance-aware regular path queries with relational query engines  

Science Conference Proceedings (OSTI)

Use of graphs is growing rapidly in social networks, semantic web, biological databases, scientific workflow provenance, and other areas. Regular Path Queries (RPQs) can be seen as a core graph query language to answer pattern-based reachability queries. ... Keywords: datalog, graph querying, regular path queries

Saumen Dey; Víctor Cuevas-Vicenttín; Sven Köhler; Eric Gribkoff; Michael Wang; Bertram Ludäscher

2013-03-01T23:59:59.000Z

390

Path Selection Criteria for P2P Voice Cheng-Ying Ou, Chia-Li  

E-Print Network (OSTI)

should be the relay peer? such that the alternative path is better than the default one... 10 #12;A Fundamental QuestionQ Which is the right path selection criteria? Source Rate? Congestion Level? Delay;Two Questions to AddressQ 1 Does delay jitter speaks for all?1. Does delay jitter speaks for all

Huang, Polly

391

Two-Point Boundary Value Problems for Curves: The Case of Minimum Free Energy Paths  

E-Print Network (OSTI)

Two-Point Boundary Value Problems for Curves: The Case of Minimum Free Energy Paths corrected.S.A. Abstract The calculation of a minimum free energy path can be considered as a two-point boundary value box solvers. The second paragraph of Section 1 is corrected. Because free energy is defined in terms

Skeel, Robert

392

Relative Entropy and Free Energy Dualities: Connections to Path Integral and KL control  

E-Print Network (OSTI)

Relative Entropy and Free Energy Dualities: Connections to Path Integral and KL control Evangelos A and the fundamental dualities between free energy and relative entropy. We derive the path integral optimal control on Dynamic Programming with PI based on the duality between free energy and relative entropy. Moreover we

Anderson, Richard

393

Flight path-driven mitigation of wavefront curvature effects in SAR images  

DOE Patents (OSTI)

A wavefront curvature effect associated with a complex image produced by a synthetic aperture radar (SAR) can be mitigated based on which of a plurality of possible flight paths is taken by the SAR when capturing the image. The mitigation can be performed differently for different ones of the flight paths.

Doerry, Armin W. (Albuquerque, NM)

2009-06-23T23:59:59.000Z

394

Path Diversity over Packet Switched Networks: Performance Analysis and Rate Allocation  

E-Print Network (OSTI)

Path diversity works by setting up multiple parallel connections between the end points using the topological path redundancy of the network. In this paper, \\textit{Forward Error Correction} (FEC) is applied across multiple independent paths to enhance the end-to-end reliability. Network paths are modeled as erasure Gilbert-Elliot channels. It is known that over any erasure channel, \\textit{Maximum Distance Separable} (MDS) codes achieve the minimum probability of irrecoverable loss among all block codes of the same size. Based on the adopted model for the error behavior, we prove that the probability of irrecoverable loss for MDS codes decays exponentially for an asymptotically large number of paths. Then, optimal rate allocation problem is solved for the asymptotic case where the number of paths is large. Moreover, it is shown that in such asymptotically optimal rate allocation, each path is assigned a positive rate \\textit{iff} its quality is above a certain threshold. The quality of a path is defined as t...

Fashandi, Shervan; Khandani, Amir K

2008-01-01T23:59:59.000Z

395

On the Relationship of Tornado Path Length and Width to Intensity  

Science Conference Proceedings (OSTI)

Reported path lengths and widths of tornadoes have been modeled using Weibull distributions for different Fujita (F) scale values. The fits are good over a wide range of lengths and widths. Path length and width tend to increase with increasing F ...

Harold E. Brooks

2004-04-01T23:59:59.000Z

396

iPlane Nano: Path Prediction for Peer-to-Peer Applications Harsha V. Madhyastha  

E-Print Network (OSTI)

iPlane Nano: Path Prediction for Peer-to-Peer Applications Harsha V. Madhyastha Ethan Katz present the design and implementa- tion of iPlane Nano, a library for delivering Internet path information to peer-to-peer applications. iPlane Nano is itself a peer-to-peer application, and scales to a large

Krishnamurthy, Arvind

397

An optimum path planning for cassino parallel manipulator by using inverse dynamics  

Science Conference Proceedings (OSTI)

In this paper, a novel algorithm is formulated and implemented for optimum path planning of parallel manipulators. A multi-objective optimisation problem has been formulated for an efficient numerical solution procedure through kinematic and dynamic ... Keywords: Parallel Manipulators, Path Planning, Robotics, Simulation

G. Carbone; M. Ceccarelli; P. j. Oliveira; S. f. p. Saramago; J. c. m. Carvalho

2008-03-01T23:59:59.000Z

398

Testing Oil Saturation Distribution in Migration Paths Using MRI1 Jianzhao Yan 1  

E-Print Network (OSTI)

- 1 - Testing Oil Saturation Distribution in Migration Paths Using MRI1 Jianzhao Yan 1 , Xiaorong media, and to measure oil and water saturation. Although this technique has great advantages compared14. Using15 MRI, the oil secondary migration paths are scanned to measure the saturation distribution during

Paris-Sud XI, Université de

399

Spare capacity reprovisioning for high availability shared backup path protection connections  

Science Conference Proceedings (OSTI)

Shared backup path protection (SBPP) has been widely studied in the Generalized MPLS (GMPLS) networks due to its efficient spare capacity sharing as well as simplicity and flexibility in service provisioning. This paper presents a novel availability ... Keywords: End-to-end availability, Generalized multi-protocol label switching (GMPLS), Shared backup path protection (SBPP), Spare capacity reprovisioning

Qi Guo; Pin-Han Ho; Hsiang-Fu Yu; Janos Tapolcai; Hussein T. Mouftah

2010-03-01T23:59:59.000Z

400

Observations on the Variability of the Gulf Stream Path between 74°W and 70°W  

Science Conference Proceedings (OSTI)

The Gulf Stream path varies in a wavelike fashion in the deep water downstream of Cape Hatteras, energetic within a range of wavelengths ? from 150 km to over 1000 km, and periods ? from 4 d to over 500 d. The authors determined the path from the ...

Harilaos Kontoyiannis; D. Randolph Watts

1994-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Observability-based local path planning and obstacle avoidance using bearing-only measurements  

Science Conference Proceedings (OSTI)

In this paper we present an observability-based local path planning and obstacle avoidance technique that utilizes an extended Kalman Filter (EKF) to estimate the time-to-collision (TTC) and bearing to obstacles using bearing-only measurements. To ensure ... Keywords: Collision avoidance, Miniature air vehicle, Observability, Path planning

Huili Yu, Rajnikant Sharma, Randal W. Beard, Clark N. Taylor

2013-12-01T23:59:59.000Z

402

Mobile robot path planning algorithm by equivalent conduction heat flow topology optimization  

Science Conference Proceedings (OSTI)

This paper addresses the path planning problem for a point robot moving in a planar environment filled with obstacles. Our approach is based on the principles of thermal conduction and structural topology optimization and rests on the observation that, ... Keywords: Conduction heat flow, Mobile robot, Path planning, Topology optimization

Jae Chun Ryu; Frank Chongwoo Park; Yoon Young Kim

2012-05-01T23:59:59.000Z

403

Smooth path and speed planning for an automated public transport vehicle  

Science Conference Proceedings (OSTI)

This paper presents a path and speed planner for automated public transport vehicles in unstructured environments. Since efficiency and comfort are two of the key issues in promoting this kind of transportation system, they are dealt with explicitly ... Keywords: Automated vehicles, Path planning, Speed planning

Jorge Villagra; Vicente Milanés; Joshué Pérez; Jorge Godoy

2012-02-01T23:59:59.000Z

404

Energy-Efficient Path Planning for Solar-Powered Mobile Robots  

E-Print Network (OSTI)

Energy-Efficient Path Planning for Solar-Powered Mobile Robots Patrick A. Plonski Department@cs.umn.edu Abstract We explore the problem of energy-efficient, time-constrained path planning of a solar pow- ered circuit and basic GPS localization, and this solar map can be used for energy-efficient navigation

Minnesota, University of

405

Sample path large deviations of Poisson shot noise with heavy tail semi-exponential distributions  

E-Print Network (OSTI)

Sample path large deviations of Poisson shot noise with heavy tail semi-exponential distributions with heavy-tailed semi-exponential distributions satisfy a large deviation principle with a rate function do not depend on the shot shape. Keywords: Heavy tail distributions; sample path large deviations

Duffy, Ken

406

Improving the accuracy of the optimum-path forest supervised classifier for large datasets  

Science Conference Proceedings (OSTI)

In this work, a new approach for supervised pattern recognition is presented which improves the learning algorithm of the Optimum-Path Forest classifier (OPF), centered on detection and elimination of outliers in the training set. Identification of outliers ... Keywords: learning algorithm, optimum-path forest classifier, outlier detection, supervised classification

César Castelo-Fernández; Pedro J. De Rezende; Alexandre X. Falcão; João Paulo Papa

2010-11-01T23:59:59.000Z

407

On-line free-flight path optimization based on improved genetic algorithms  

Science Conference Proceedings (OSTI)

Free flight (FF) is the ideal strategy of current investigations on air traffic management systems, where an on-line flight path optimization algorithm is of top importance. This paper proposes an innovative algorithm with potential real-time properties ... Keywords: Chromosome, Flight path, Free flight, Genetic algorithm, Structured airspace

Xiao-Bing Hu; Shu-Fan Wu; Ju Jiang

2004-12-01T23:59:59.000Z

408

A Pilot Plant: The Fastest Path to Commercial Fusion Energy  

SciTech Connect

Considerable effort has been dedicated to determining the possible properties of a magneticconfinement fusion power plant, particularly in the U.S.1, Europe2 and Japan3. There has also been some effort to detail the development path to fusion energy, particularly in the U.S.4 Only limited attention has been given, in Japan5 and in China6, to the options for a specific device to form the bridge from the International Thermonuclear Experimental Reactor, ITER, to commercial fusion energy. Nor has much attention been paid, since 2003, to the synergies between magnetic and inertial fusion energy development. Here we consider, at a very high level, the possibility of a Qeng ? 1 Pilot Plant, with linear dimensions ~ 2/3 the linear dimensions of a commercial fusion power plant, as the needed bridge. As we examine the R&D needs for such a system we find significant synergies between the needs for the development of magnetic and inertial fusion energy.

Robert J. Goldston

2010-03-03T23:59:59.000Z

409

RightPath Team Recognized by Secretary Chu | National Nuclear Security  

National Nuclear Security Administration (NNSA)

RightPath Team Recognized by Secretary Chu | National Nuclear Security RightPath Team Recognized by Secretary Chu | National Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Continuing Management Reform Countering Nuclear Terrorism About Us Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Media Room Congressional Testimony Fact Sheets Newsletters Press Releases Speeches Events Social Media Video Gallery Photo Gallery NNSA Archive Federal Employment Apply for Our Jobs Our Jobs Working at NNSA Blog Home > NNSA Blog > RightPath Team Recognized by Secretary Chu RightPath Team Recognized by Secretary Chu Posted By Office of Public Affairs During a ceremony held last week, the RightPath Integrated Project Team

410

Community-Based Forest (Natural) Resource Management: A Path to Sustainable  

Open Energy Info (EERE)

Community-Based Forest (Natural) Resource Management: A Path to Sustainable Community-Based Forest (Natural) Resource Management: A Path to Sustainable Environment and Development Jump to: navigation, search Name Community-Based Forest (Natural) Resource Management: A Path to Sustainable Environment and Development Agency/Company /Organization Regional Community Forestry Training Center for Asia and the Pacific Sector Land Focus Area Forestry Topics Implementation, Background analysis Resource Type Lessons learned/best practices Website http://recoftc.org/site/filead Country Philippines, Nepal UN Region South-Eastern Asia References Community-Based Forest (Natural) Resource Management: A Path to Sustainable Environment and Development[1] Community-Based Forest (Natural) Resource Management: A Path to Sustainable Environment and Development Screenshot

411

Event:Lighting Our Path: The Philips Experience in Promoting Advanced  

Open Energy Info (EERE)

Path: The Philips Experience in Promoting Advanced Path: The Philips Experience in Promoting Advanced Lighting Technologies Jump to: navigation, search Calendar.png Lighting Our Path: The Philips Experience in Promoting Advanced Lighting Technologies: 12:30-2:00 Eastern Time on 2011/05/11 David Rodgers of the Global Environment Facility (GEF) would like to make you all aware of the event below titled Lighting Our Path: The Philips Experience in Promoting Advanced Lighting Technologies to be held next Weds. May 11. Event Details Name Lighting Our Path: The Philips Experience in Promoting Advanced Lighting Technologies Date 2011/05/11 Time 12:30-2:00 Eastern Time Location Washington, District of Columbia Organizer Global Environment Facility Tags CLEAN, LEDS Website Event Website Ret LikeLike UnlikeLike You like this.Sign Up to see what your friends like.

412

Project W-314 updated acceptance test report HNF-4649 for HNF-4648 241-AN-A pit leak detection ANA-WT-LDSTA-331 for project W-314  

SciTech Connect

The purpose of the test was to verify that the AN Tank Farm AN-A Pit Leak Detector components are functionally integrated and operate in accordance with engineering design specifications. The Acceptance Test Procedure HNF-4648,24l-AN-A-Pit Leak Detection ANA-WT-LDSTA-331 was conducted between 23 June and 01 July 1999 at the 200E AN Tank Farm. The test has been completed with no open test exceptions. The test was conducted prior to final engineering ''as built'' activities being completed this had no impact on the procedure or test results. All components, identified in the procedure were found to be labeled and identified as written in the procedure.

HAMMERS, J.S.

1999-09-30T23:59:59.000Z

413

Project W-314 acceptance test report HNF-4651 for HNF-4650 SN-268 encasement leak detection ANA-WT-LDSTA-335 for project W-314  

SciTech Connect

The purpose of the test was to verify that the AN Tank Farm Encasement Leak Detector components are functionally integrated and operate in accordance with engineering design specifications The Acceptance Test Procedure HNF-4650, SN-268 Encasement Leak Detection ANA-W-LDSTA-335, was conducted between 22 June and 01 July 1999 at the 200E AN Tank Farm. The test has been completed with no open test exceptions The test was conducted prior to final engineering ''as built'' activities being completed this had no impact on the procedure or test results. All components, identified in the procedure, were found to be labeled and identified as written in the procedure.

HAMMERS, J.S.

1999-09-30T23:59:59.000Z

414

Project W-314 acceptance test report HNF-4647 for HNF-4646 241-B pit leak detection ANB-WT-LDSTA-231 for project W-314  

SciTech Connect

The purpose of the test was to verify that the AN Tank Farm B Pit Leak Detector components are functionally integrated and operate in accordance with engineering design specifications. The Acceptance Test Procedure HNF-4646,241-AN-B-Pit Leak Detection ANB-WT-LDSTA-231 was conducted between 26 June and 02 July 1999 at the 200E AN Tank Farm. The test has been completed with no open test exceptions. The test was conducted prior to final engineering ''as built'' activities being completed this had no impact on the procedure or test results. All components, identified in the procedure were found to be labeled and identified as written in the procedure.

HAMMERS, J.S.

1999-09-30T23:59:59.000Z

415

NRC Job Code V6060: Extended in-situ and real time monitoring. Task 4: Detection and monitoring of leaks at nuclear power plants external to structures  

SciTech Connect

In support of Task 4 of the NRC study on compliance with 10 CFR part 20.1406, minimization of contamination, Argonne National Laboratory (ANL) conducted a one-year scoping study, in concert with a parallel study performed by NRC/NRR staff, on monitoring for leaks at nuclear power plants (NPPs) external to structures. The objective of this task-4 study is to identify and assess those sensors and monitoring techniques for early detection of abnormal radioactive releases from the engineered facility structures, systems and components (SSCs) to the surrounding underground environment in existing NPPs and planned new reactors. As such, methods of interest include: (1) detection of anomalous water content of soils surrounding SSCs, (2) radionuclides contained in the leaking water, and (3) secondary signals such as temperature. ANL work scope includes mainly to (1) identify, in concert with the nuclear industry, the sensors and techniques that have most promise to detect radionuclides and/or associated chemical releases from SSCs of existing NPPs and (2) review and provide comments on the results of the NRC/NRR staff scoping study to identify candidate technologies. This report constitutes the ANL deliverable of the task-4 study. It covers a survey of sensor technologies and leak detection methods currently applied to leak monitoring at NPPs. The survey also provides a technology evaluation that identifies their strength and deficiency based on their detection speed, sensitivity, range and reliability. Emerging advanced technologies that are potentially capable of locating releases, identifying the radionuclides, and estimating their concentrations and distributions are also included in the report along with suggestions of required further research and development.

Sheen, S. H. (Nuclear Engineering Division)

2012-08-01T23:59:59.000Z

416

A New In Situ Laser Long-Path Absorption Instrument for the Measurement of Tropospheric OH Radicals  

Science Conference Proceedings (OSTI)

The authors describe a high-resolution long-path differential optical absorption spectrometer developed for the measurement of tropospheric hydroxyl radical concentrations. The instrument uses an atmospheric absorption light path of up to 3000-m ...

Hans-Peter Dorn; Uwe Brandenburger; Theo Brauers; Martin Hausmann

1995-10-01T23:59:59.000Z

417

Ensuring critical event sequences in high consequence computer based systems as inspired by path expressions  

SciTech Connect

The goal of our work is to provide a high level of confidence that critical software driven event sequences are maintained in the face of hardware failures, malevolent attacks and harsh or unstable operating environments. This will be accomplished by providing dynamic fault management measures directly to the software developer and to their varied development environments. The methodology employed here is inspired by previous work in path expressions. This paper discusses the perceived problems, a brief overview of path expressions, the proposed methods, and a discussion of the differences between the proposed methods and traditional path expression usage and implementation.

Kidd, M.E.C.

1997-02-01T23:59:59.000Z

418

Ensuring critical event sequences in high integrity software by applying path expressions  

SciTech Connect

The goal of this work is to extend the use of existing path expression theory and methodologies to ensure that critical software event sequences are maintained even in the face of malevolent attacks and harsh or unstable operating environments. This will be accomplished by providing dynamic fault management measures directly to the software developer and to their varied development environments. This paper discusses the perceived problems, a brief overview of path expressions, and the author`s proposed extension areas. The authors discuss how the traditional path expression usage and implementation differs from the intended usage and implementation.

Kidd, M.E.C.

1996-07-01T23:59:59.000Z

419

Development of Path 15 Software: Managing Power Transfer Constraints on a Major Transmission Interface: Path 15 of the California Transmission System with EPRI's DTCR Technology  

Science Conference Proceedings (OSTI)

In a previous research project, a dynamic thermal software model was developed and tested for the California Path 15 power transmission interface. A summary of that work is included in this report. The dynamic thermal model used real-time data from tension monitors on the critical Gates Panoche 230-kV lines. It also used continual updates of an automatic load and generation reduction scheme to calculate the post-contingency Path 15 power flow resulting from the loss of two 500-kV lines (double line outag...

2003-12-08T23:59:59.000Z

420

Low Carbon Growth: a Potential Path for Mexico - GHG Abatement Cost Curve |  

Open Energy Info (EERE)

Growth: a Potential Path for Mexico - GHG Abatement Cost Curve Growth: a Potential Path for Mexico - GHG Abatement Cost Curve (Redirected from Mexico-McKinsey GHG Abatement Cost Curve) Jump to: navigation, search Name Low Carbon Growth: a Potential Path for Mexico - GHG Abatement Cost Curve Agency/Company /Organization Centro Mario Molina, McKinsey and Company Sector Energy, Land Focus Area Energy Efficiency, Renewable Energy Topics Resource assessment, Background analysis Website http://www.esmap.org/filez/pub Country Mexico Central America References ESMAP Low Carbon Growth Country Studies Program[1] References ↑ "ESMAP Low Carbon Growth Country Studies Program" Retrieved from "http://en.openei.org/w/index.php?title=Low_Carbon_Growth:_a_Potential_Path_for_Mexico_-_GHG_Abatement_Cost_Curve&oldid=3289

Note: This page contains sample records for the topic "lpf leak path" 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

State and parameter estimation using Monte Carlo evaluation of path integrals  

E-Print Network (OSTI)

Transferring information from observations of a dynamical system to estimate the fixed parameters and unobserved states of a system model can be formulated as the evaluation of a discrete time path integral in model state space. The observations serve as a guiding potential working with the dynamical rules of the model to direct system orbits in state space. The path integral representation permits direct numerical evaluation of the conditional mean path through the state space as well as conditional moments about this mean. Using a Monte Carlo method for selecting paths through state space we show how these moments can be evaluated and demonstrate in an interesting model system the explicit influence of the role of transfer of information from the observations. We address the question of how many observations are required to estimate the unobserved state variables, and we examine the assumptions of Gaussianity of the underlying conditional probability.

John C. Quinn; Henry D. I. Abarbanel

2009-12-08T23:59:59.000Z

422

A hub-based labeling algorithm for shortest paths in road networks  

Science Conference Proceedings (OSTI)

Abraham et al. [SODA 2010] have recently presented a theoretical analysis of several practical point-to-point shortest path algorithms based on modeling road networks as graphs with low highway dimension. They also analyze a labeling algorithm. While ...

Ittai Abraham; Daniel Delling; Andrew V. Goldberg; Renato F. Werneck

2011-05-01T23:59:59.000Z

423

The Role of Eddy Diffusivity Profiles on Stratocumulus Liquid Water Path Biases  

Science Conference Proceedings (OSTI)

Results from simulations of the stratocumulus-topped boundary layer with one-dimensional versions of general simulation models typically exhibit a wide range of spread in the modeled liquid water path (LWP). These discrepancies are often ...

Stephan R. de Roode

2007-07-01T23:59:59.000Z

424

A direct thin-film path towards low-cost large-area III-V ...  

A direct thin-film path towards low-cost large-area III-V ... depending on the surface energy constraints of the nucleation ... scaling all times in ...

425

Quantitative Measurements of Path-Integrated Rain Rate by an Airborne Microwave Radiometer over the Ocean  

Science Conference Proceedings (OSTI)

Data on the airborne microwave radiometer, which is one of the sensors of the airborne microwave rain-scatterometer/radiometer (AMRS) system, are analyzed to infer path-integrated rain rate measured from topside. The equation of radiative ...

Masaharu Fujita; Ken'ichi Okamoto; Harunobu Masuko; Takeyuki Ojima; Nobuyoshi Fugono

1985-09-01T23:59:59.000Z

426

A Comparison of Several Radiometric Methods of Deducing Path-Integrated Cloud Liquid Water  

Science Conference Proceedings (OSTI)

Using radiometer data collected during the Canadian Atlantic Storms Program, we have investigated five different methods of estimating the path-integrated, or columnar, cloud liquid water. The methods consist of one- and two-channel physical ...

Chong Wei; H. G. Leighton; R. R. Rogers

1989-12-01T23:59:59.000Z

427

Benefits of path summaries in an XML query optimizer supporting multiple access methods  

Science Conference Proceedings (OSTI)

We compare several optimization strategies implemented in an XML query evaluation system. The strategies incorporate the use of path summaries into the query optimizer, and rely on heuristics that exploit data statistics.We present experimental results ...

Attila Barta; Mariano P. Consens; Alberto O. Mendelzon

2005-08-01T23:59:59.000Z

428

Calibration Results for NOAA-11 AVHRR Channels 1 and 2 from Congruent Path Aircraft Observations  

Science Conference Proceedings (OSTI)

A method for using congruent atmospheric path aircraft-satellite observations to calibrate a satellite radiometer is presented. A calibrated spectroradiometer aboard a NASA ER-2 aircraft at an altitude of 19 km above White Sands, New Mexico, was ...

Peter Abel; B. Guenther; Reginald N. Galimore; John W. Cooper

1993-08-01T23:59:59.000Z

429

Entrainment Rate, Cloud Fraction, and Liquid Water Path of PBL Stratocumulus Clouds  

Science Conference Proceedings (OSTI)

The large eddy simulation technique is used to search for key factors in determining the entrainment rate, cloud fraction, and liquid water path in the stratocumulus-topped boundary layer (STBL), with the goal of developing simple schemes of ...

Chin-Hoh Moeng

2000-11-01T23:59:59.000Z

430

Method and apparatus for monitoring characteristics of a flow path having solid components flowing therethrough  

DOE Patents (OSTI)

A method and apparatus is provided for monitoring a flow path having plurality of different solid components flowing therethrough. For example, in the harvesting of a plant material, many factors surrounding the threshing, separating or cleaning of the plant material and may lead to the inadvertent inclusion of the component being selectively harvested with residual plant materials being discharged or otherwise processed. In accordance with the present invention the detection of the selectively harvested component within residual materials may include the monitoring of a flow path of such residual materials by, for example, directing an excitation signal toward of flow path of material and then detecting a signal initiated by the presence of the selectively harvested component responsive to the excitation signal. The detected signal may be used to determine the presence or absence of a selected plant component within the flow path of residual materials.

Hoskinson, Reed L. (Rigby, ID); Svoboda, John M. (Idaho Falls, ID); Bauer, William F. (Idaho Falls, ID); Elias, Gracy (Idaho Falls, ID)

2008-05-06T23:59:59.000Z

431

Evaluation of LOWTRAN and MODTRAN for use over high zenith angle/long path length viewing.  

E-Print Network (OSTI)

??LOWTRAN and MODTRAN were evaluated in the 2.0-5.5 micron region against field collection data at high zenith angle/long path lengths to determine the degree of… (more)

Wright, Jonathan

1991-01-01T23:59:59.000Z

432

Conceptual Soundness, Metric Development, Benchmarking, and Targeting for PATH Subprogram Evaluation  

Science Conference Proceedings (OSTI)

The objective of this study is to evaluate the conceptual soundness of the U.S. Department of Housing and Urban Development (HUD) Partnership for Advancing Technology in Housing (PATH) program's revised goals and establish and apply a framework to identify and recommend metrics that are the most useful for measuring PATH's progress. This report provides an evaluative review of PATH's revised goals, outlines a structured method for identifying and selecting metrics, proposes metrics and benchmarks for a sampling of individual PATH programs, and discusses other metrics that potentially could be developed that may add value to the evaluation process. The framework and individual program metrics can be used for ongoing management improvement efforts and to inform broader program-level metrics for government reporting requirements.

Mosey. G.; Doris, E.; Coggeshall, C.; Antes, M.; Ruch, J.; Mortensen, J.

2009-01-01T23:59:59.000Z

433

Response of Storm Tracks to Bimodal Kuroshio Path States South of Japan  

Science Conference Proceedings (OSTI)

A large meridional shift of the sea surface temperature front occurs off the south coast of Japan associated with transitions between the large-meander and straight paths of the Kuroshio. Most extratropical cyclones generated in winter near the ...

Hirohiko Nakamura; Ayako Nishina; Shoshiro Minobe

2012-11-01T23:59:59.000Z

434

A Triple-Path Denuder Instrument for Ambient Particulate Sampling and Analysis  

Science Conference Proceedings (OSTI)

A field instrument for sampling sulfate and nitrate particulate matter in a controlled chemical environment has been constructed and field tested. The instrument contains HNO3 and NH3 denuders and an ambient air path, all connected by manifold to ...

Briant L. Davis; L. Ronald Johnson; Bryan J. Johnson; Robert J. Hammer

1988-02-01T23:59:59.000Z

435

Comparisons of SSM/I Liquid Water Paths with Aircraft Measurements  

Science Conference Proceedings (OSTI)

Comparisons have been made between in situ aircraft measurements of integrated liquid water and retrievals of integrated liquid water path (LWP) from algorithms using SSM/I brightness temperatures. The aircraft measurements were made over the ...

Stewart G. Cober; Andre Tremblay; George A. Isaac

1996-03-01T23:59:59.000Z

436

The Path of Carbon in Photosynthesis. XVI. Kinetic Relationships of the Intermediates in Steady State Photosynthesis  

E-Print Network (OSTI)

OF CARBON I N PHOTOSYNTHESIS, X U , KINETIC REIATIORSEIPS OFof steady. state photosynthesis in cUO2 provides informationThe path of carbon i n photosynthesis begins with a small

Benson, A.A.; Kawaguchi, S.; Hayes, P.; Calvin, M.

1952-01-01T23:59:59.000Z

437

THE PATH OF CARBON IN PHOTOSYNTHESIS. X. CARBON DIOXIDE ASSIMILATION IN PLANTS  

E-Print Network (OSTI)

48 The Fath of Carbon i n Photosynthesis X. Carbon Dioxide658 THE PATH O CBRBQM I N PHOTOSYNTHESIS F x CA~ON DIOXIDEr e a c t i o n s of photosynthesis (phosphoglycera t e and

1950-01-01T23:59:59.000Z

438

The Path of Carbon in Photosynthesis. XVII. Phosphorus Compounds as Intermediates in Photosynthesis  

E-Print Network (OSTI)

PATH OF CARBON IN PHOTOSYNTHESIS. XVII. PHOSPHORUS COMPOUNDSA5 I W I A T E S IN PHOTOSYNTHESIS* J o G o Buchanan, F o Jet e r s i x t y seconds photosynthesis by Chlorella, by fa^

1952-01-01T23:59:59.000Z

439

Spatial Variability of Liquid Water Path in Marine Low Cloud: The Importance of Mesoscale Cellular Convection  

Science Conference Proceedings (OSTI)

Liquid water path (LWP) mesoscale spatial variability in marine low cloud over the eastern subtropical oceans is examined using two months of daytime retrievals from the Moderate Resolution Imaging Spectroradiometer (MODIS) on the NASA Terra ...

Robert Wood; Dennis L. Hartmann

2006-05-01T23:59:59.000Z

440

REACTION PATH HAMILTONIAN: TUNNELING EFFECTS IN THE UNIMOLECULAR ISOMERIZATION HNC u> HCN  

E-Print Network (OSTI)

path, and the energy and force constant matrix along it, aresecond-derivative matrix of the electronic energy along theis the matrix of second derivatives of the potential energy

Gray, S.K.

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "lpf leak path" 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

Path planning for UAVs under communication constraints using SPLAT! and MILP  

E-Print Network (OSTI)

;2 physical survey, environmental and meteorological monitoring, aerial photography, and search- and will in this paper address the problem of offline path planning for Unmanned Aerial Vehicles (UAVs). Our goal

Johansen, Tor Arne

442

Next Generation Nuclear Plant Project Technology Development Roadmaps: The Technical Path Forward  

SciTech Connect

This document presents the Next Generation Nuclear Plant (NGNP) Systems, Subsystems, and Components, establishes a baseline for the current technology readiness status, and provides a path forward to achieve increasing levels of technical maturity.

John Collins

2009-01-01T23:59:59.000Z

443

FAST 1.0 - Flow Path Analysis for Steam Turbines, Version 1.0  

Science Conference Proceedings (OSTI)

FAST Software Flow Analysis of Steam Turbines is a tool for performance engineers, designers and financial analysts. This tool is for industry use by utilities and manufacturers to evaluate thermal performance characteristics of existing and proposed turbine steam-path modifications/upgrades. Description The FAST software diagnoses performance problems and facilitates the economic evaluation of steam-path upgrade options. FAST software is used primarily by the thermal performance engineer in both fossil ...

2007-05-30T23:59:59.000Z

444

Path placement optimization of manipulators based on energy consumption: application to the orthoglide 3-axis  

E-Print Network (OSTI)

This paper deals with the optimal path placement for a manipulator based on energy consumption. It proposes a methodology to determine the optimal location of a given test path within the workspace of a manipulator with minimal electric energy used by the actuators while taking into account the geometric, kinematic and dynamic constraints. The proposed methodology is applied to the Orthoglide~3-axis, a three-degree-of-freedom translational parallel kinematic machine (PKM), as an illustrative example.

Ur-Rehman, Raza; Chablat, Damien; Wenger, Philippe

2009-01-01T23:59:59.000Z

445

Improving the Quality of Non-Holonomic Motion by Hybridizing C-PRM Paths  

E-Print Network (OSTI)

Sampling-based motion planners are an effective means for generating collision-free motion paths. However, the quality of these motion paths, with respect to different quality measures such as path length, clearance, smoothness or energy, is often notoriously low. This problem is accentuated in the case of non-holonomic sampling-based motion planning, in which the space of feasible motion trajectories is restricted. In this study, we combine the C-PRM algorithm by Song and Amato with our recently introduced path-hybridization approach, for creating high quality non-holonomic motion paths, with combinations of several different quality measures such as path length, smoothness or clearance, as well as the number of reverse car motions. Our implementation includes a variety of code optimizations that result in nearly real-time performance, and which we believe can be extended with further optimizations to a real-time tool for the planning of high-quality car-like motion.

Berger, Itamar; Zohar, Gal; Raveh, Barak; Halperin, Dan

2010-01-01T23:59:59.000Z

446

Effects of Stratification and Bottom Topography on the Kuroshio Path Variation South of Japan. Part I: Dependence of the Path Selection on Velocity  

Science Conference Proceedings (OSTI)

Numerical experiments are executed using a two-layer inflow–outflow ocean model with simplified geometry to investigate the effects of stratification and bottom topography on the path variation of the Kuroshio south of Japan. In a flat-bottom ...

Shuhei Masuda; Kazunori Akitomo; Toshiyuki Awaji

1999-09-01T23:59:59.000Z

447

Nuclear fuel cycle facility accident analysis handbook  

Science Conference Proceedings (OSTI)

The purpose of this Handbook is to provide guidance on how to calculate the characteristics of releases of radioactive materials and/or hazardous chemicals from nonreactor nuclear facilities. In addition, the Handbook provides guidance on how to calculate the consequences of those releases. There are four major chapters: Hazard Evaluation and Scenario Development; Source Term Determination; Transport Within Containment/Confinement; and Atmospheric Dispersion and Consequences Modeling. These chapters are supported by Appendices, including: a summary of chemical and nuclear information that contains descriptions of various fuel cycle facilities; details on how to calculate the characteristics of source terms for releases of hazardous chemicals; a comparison of NRC, EPA, and OSHA programs that address chemical safety; a summary of the performance of HEPA and other filters; and a discussion of uncertainties. Several sample problems are presented: a free-fall spill of powder, an explosion with radioactive release; a fire with radioactive release; filter failure; hydrogen fluoride release from a tankcar; a uranium hexafluoride cylinder rupture; a liquid spill in a vitrification plant; and a criticality incident. Finally, this Handbook includes a computer model, LPF No.1B, that is intended for use in calculating Leak Path Factors. A list of contributors to the Handbook is presented in Chapter 6. 39 figs., 35 tabs.

NONE

1998-03-01T23:59:59.000Z

448

A path integral formalism for non-equilibrium Hamiltonian statistical systems  

E-Print Network (OSTI)

In a near equilibrium statistical system the Onsager-Machlup path integral has a long and useful history. The situation far from equilibrium has remained less clear. In this contribution a new general formulation for path integrals is proposed based on mixtures of an appropriate family of quasi-equilibrium probability densities. The path integral introduced here uses a generalized Boltzmann principle to associate path likelihoods with a multiple of the information loss of a particular path with respect to Liouvillean evolution. The loss at a particular time is given by a Lagrangian function of the thermodynamical variables and their time derivatives. An important implication of the present formulation is that future thermodynamical evolution depends not just on the instantaneous thermodynamic variables but also on the particular mixture of quasi-equilibrium distributions present. This behaviour has been previously seen in direct numerical simulations of turbulent dynamical systems and is also a fundamental property of Wiener path integrals. The Lagrangian derived is formally identical to that used in quantum mechanics to describe a particle moving non-relativistically in a particular vector and scalar electromagnetic field and also within a manifold with a metric tensor equal to the Fisher information matrix of the exponential family manifold. It is shown that a simple transformation due to Roncadelli enables the derived Lagrangian to be recast into standard Onsager-Machlup form. This transformation thus enables a derivation of the thermodynamical trajectory which is the most likely path. Also revealed is a decomposition of the thermodynamical trajectory into a reversible and irreversible piece which takes the form of the non-equilibrium thermodynamical equations recently proposed by \\"Ottinger.

Richard Kleeman

2013-07-03T23:59:59.000Z

449

Amplitudes for Spacetime Regions and the Quantum Zeno Effect: Pitfalls of Standard Path Integral Constructions  

E-Print Network (OSTI)

We argue that under very general conditions, there is a significant complication in amplitudes for spacetimes regions constructed from path integrals. This is the fact that the concrete implementation of the restrictions on paths over an interval of time corresponds, in an operator language, to sharp monitoring at every moment of time in the given time interval. Such processes suffer from the quantum Zeno effect -- the continual monitoring of a quantum system in a Hilbert subspace prevents its state from leaving that subspace. As a consequence, path integral amplitudes defined in this seemingly obvious way have physically and intuitively unreasonable properties and in particular, no sensible classical limit. In this paper we describe this frequently-occurring but little-appreciated phenomenon in some detail, showing clearly the connection with the quantum Zeno effect. We then show that it may be avoided by implementing the restriction on paths in the path integral in a "softer" way. The resulting amplitudes then involve a new coarse graining parameter, which may be taken to be a timescale $\\eps$, describing the softening of the restrictions on the paths. We argue that the complications arising from the Zeno effect are then negligible as long as $\\eps >> 1/ E$, where $E$ is the energy scale of the incoming state. Our criticisms of path integral constructions largely apply to approaches to quantum theory such as the decoherent histories approach or quantum measure theory, which do not specifically involve measurements. We address some criticisms of our approach by Sokolovksi, concerning the relevance of our results to measurement-based models.

J. J. Halliwell; J. M. Yearsley

2013-01-18T23:59:59.000Z

450

A collaborative network middleware project by Lambda Station, TeraPaths, and Phoebus  

Science Conference Proceedings (OSTI)

The TeraPaths, Lambda Station, and Phoebus projects, funded by the US Department of Energy, have successfully developed network middleware services that establish on-demand and manage true end-to-end, Quality-of-Service (QoS) aware, virtual network paths across multiple administrative network domains, select network paths and gracefully reroute traffic over these dynamic paths, and streamline traffic between packet and circuit networks using transparent gateways. These services improve network QoS and performance for applications, playing a critical role in the effective use of emerging dynamic circuit network services. They provide interfaces to applications, such as dCache SRM, translate network service requests into network device configurations, and coordinate with each other to setup up end-to-end network paths. The End Site Control Plane Subsystem (ESCPS) builds upon the success of the three projects by combining their individual capabilities into the next generation of network middleware. ESCPS addresses challenges such as cross-domain control plane signalling and interoperability, authentication and authorization in a Grid environment, topology discovery, and dynamic status tracking. The new network middleware will take full advantage of the perfSONAR monitoring infrastructure and the Inter-Domain Control plane efforts and will be deployed and fully vetted in the Large Hadron Collider data movement environment.

Bobyshev, A.; /Fermilab; Bradley, S.; /Brookhaven; Crawford, M.; /Fermilab; DeMar, P.; /Fermilab; Katramatos, D.; /Brookhaven; Shroff, K.; /Brookhaven; Swany, M.; /Delaware U.; Yu, D.; /Brookhaven

2010-01-01T23:59:59.000Z

451

Rationality and Traffic Attraction: Incentives for Honest Path Announcements in BGP  

E-Print Network (OSTI)

We study situations in which autonomous systems (ASes) may have incentives to send BGP announcements differing from the AS-level paths that packets traverse in the data plane. Prior work on this issue assumed that ASes seek only to obtain the best possible outgoing path for their traffic. In reality, other factors can influence a rational AS’s behavior. Here we consider a more natural model, in which an AS is also interested in attracting incoming traffic (e.g., because other ASes pay it to carry their traffic). We ask what combinations of BGP enhancements and restrictions on routing policies can ensure that ASes have no incentive to lie about their data-plane paths. We find that protocols like S-BGP alone are insufficient, but that S-BGP does suffice if coupled with additional (quite unrealistic) restrictions on routing policies. Our game-theoretic analysis illustrates the high cost of ensuring that the ASes honestly announce data-plane paths in their BGP path announcements.

Sharon Goldberg; Shai Halevi; Aaron D. Jaggard; Vijay Ramachandran; Rebecca N. Wright

2008-01-01T23:59:59.000Z

452

Milestone Report #2: Direct Evaporator Leak and Flammability Analysis Modifications and Optimization of the Organic Rankine Cycle to Improve the Recovery of Waste Heat  

Science Conference Proceedings (OSTI)

The direct evaporator is a simplified heat exchange system for an Organic Rankine Cycle (ORC) that generates electricity from a gas turbine exhaust stream. Typically, the heat of the exhaust stream is transferred indirectly to the ORC by means of an intermediate thermal oil loop. In this project, the goal is to design a direct evaporator where the working fluid is evaporated in the exhaust gas heat exchanger. By eliminating one of the heat exchangers and the intermediate oil loop, the overall ORC system cost can be reduced by approximately 15%. However, placing a heat exchanger operating with a flammable hydrocarbon working fluid directly in the hot exhaust gas stream presents potential safety risks. The purpose of the analyses presented in this report is to assess the flammability of the selected working fluid in the hot exhaust gas stream stemming from a potential leak in the evaporator. Ignition delay time for cyclopentane at temperatures and pressure corresponding to direct evaporator operation was obtained for several equivalence ratios. Results of a computational fluid dynamic analysis of a pinhole leak scenario are given.

Donna Post Guillen

2013-09-01T23:59:59.000Z

453

From Salesman to CEO: A 45-year Path to Energy Efficiency | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

From Salesman to CEO: A 45-year Path to Energy Efficiency From Salesman to CEO: A 45-year Path to Energy Efficiency From Salesman to CEO: A 45-year Path to Energy Efficiency October 15, 2010 - 10:50am Addthis Ohio Governor Ted Strickland (left) got a tour of the New Horizons Baking Company with CEO Tim Brown this winter to announce the grant.| Photo courtesy of New Horizons Baking Company Ohio Governor Ted Strickland (left) got a tour of the New Horizons Baking Company with CEO Tim Brown this winter to announce the grant.| Photo courtesy of New Horizons Baking Company Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? State Energy Program award helped New Horizons Baking Company purchase energy-efficient oven Oven is 25% more efficient and increased production by 20% Certified minority-owned company stays cost-competitive and retains

454

Atlanta Suburb Greases the Path to Savings with Biodiesel | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Atlanta Suburb Greases the Path to Savings with Biodiesel Atlanta Suburb Greases the Path to Savings with Biodiesel Atlanta Suburb Greases the Path to Savings with Biodiesel December 7, 2011 - 3:33pm Addthis Downtown Smyrna, Georgia, a town that's poised to see big savings thanks to their investment in biodiesel. | Photo by Ken Cook Downtown Smyrna, Georgia, a town that's poised to see big savings thanks to their investment in biodiesel. | Photo by Ken Cook Chris Galm Marketing & Communications Specialist, Office of Energy Efficiency & Renewable Energy What does this project do? Reduces fuel consumption Saves the city money Extends the lifespan of city owned service vehicles "We sat down and actually met with several people out of the biodiesel industry and found out how amazingly simple it was for us to do this. To

455

Atlanta Suburb Greases the Path to Savings with Biodiesel | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Atlanta Suburb Greases the Path to Savings with Biodiesel Atlanta Suburb Greases the Path to Savings with Biodiesel Atlanta Suburb Greases the Path to Savings with Biodiesel December 7, 2011 - 3:33pm Addthis Downtown Smyrna, Georgia, a town that's poised to see big savings thanks to their investment in biodiesel. | Photo by Ken Cook Downtown Smyrna, Georgia, a town that's poised to see big savings thanks to their investment in biodiesel. | Photo by Ken Cook Chris Galm Marketing & Communications Specialist, Office of Energy Efficiency & Renewable Energy What does this project do? Reduces fuel consumption Saves the city money Extends the lifespan of city owned service vehicles "We sat down and actually met with several people out of the biodiesel industry and found out how amazingly simple it was for us to do this. To

456

Initiative Guides Hawaii to the Path of Energy Independence | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Initiative Guides Hawaii to the Path of Energy Independence Initiative Guides Hawaii to the Path of Energy Independence Initiative Guides Hawaii to the Path of Energy Independence March 24, 2010 - 5:15pm Addthis The Hawaii Clean Energy Initiative's goal is to generate 70 percent of the state's power using clean energy such as wind. | Photo courtesy of the State of Hawaii. The Hawaii Clean Energy Initiative's goal is to generate 70 percent of the state's power using clean energy such as wind. | Photo courtesy of the State of Hawaii. With 90 percent of its energy coming from oil, Hawaii is the most oil-dependent state in the nation. The Hawaii Clean Energy Initiative is an ambitious plan to reverse that. A partnership between the state and the federal Department of Energy, the HCEI uses a combination of increased

457

Join the Discussion: Trailblazing a Path for Women in Clean Energy |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

the Discussion: Trailblazing a Path for Women in Clean Energy the Discussion: Trailblazing a Path for Women in Clean Energy Join the Discussion: Trailblazing a Path for Women in Clean Energy June 27, 2012 - 10:25am Addthis Kim Saylors-Laster, Vice President of Walmart Energy and ambassador for the Clean Energy Education & Empowerment Initiative. | Photo courtesy of Walmart. Kim Saylors-Laster, Vice President of Walmart Energy and ambassador for the Clean Energy Education & Empowerment Initiative. | Photo courtesy of Walmart. Kim Saylors-Laster Kim Saylors-Laster Vice President of Walmart Energy More about Kim Saylors-Laster In addition to her role as VP of Walmart Energy, Kim is an ambassador for the Clean Energy Education & Empowerment initiative. Note: On June 27 at 1 p.m. EDT, the Energy Department is hosting a Women in

458

Tracking the Path of the Sun: Profiling an NREL Senior Scientist |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Tracking the Path of the Sun: Profiling an NREL Senior Scientist Tracking the Path of the Sun: Profiling an NREL Senior Scientist Tracking the Path of the Sun: Profiling an NREL Senior Scientist June 5, 2012 - 1:27pm Addthis Metrologist Ibrahim Reda (left) and software developer Afshin Andreas developed the Solar Position Algorithm now used by solar trackers, orchard growers, and movie-camera makers. The algorithm used in the SPA appears in the shadow. | Photo by Dennis Schroeder/NREL. Metrologist Ibrahim Reda (left) and software developer Afshin Andreas developed the Solar Position Algorithm now used by solar trackers, orchard growers, and movie-camera makers. The algorithm used in the SPA appears in the shadow. | Photo by Dennis Schroeder/NREL. Erin R. Pierce Erin R. Pierce Digital Communications Specialist, Office of Public Affairs

459

Paving the path for next-generation nuclear energy | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Paving the path for next-generation nuclear energy Paving the path for next-generation nuclear energy Paving the path for next-generation nuclear energy May 6, 2013 - 2:26pm Addthis Renewed energy and enhanced coordination are on the horizon for an international collaborative that is advancing new, safer nuclear energy systems. Renewed energy and enhanced coordination are on the horizon for an international collaborative that is advancing new, safer nuclear energy systems. Deputy Assistant Secretary Kelly Deputy Assistant Secretary Kelly Deputy Assistant Secretary for Nuclear Reactor Technologies Nuclear power reactors currently under construction worldwide boast modern safety and operational enhancements that were designed by the global nuclear energy industry and enhanced through research and development (R&D)

460

U.S.-Chinese Agreement Provides Path to Further Expansion of Nuclear Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

-Chinese Agreement Provides Path to Further Expansion of -Chinese Agreement Provides Path to Further Expansion of Nuclear Energy in China U.S.-Chinese Agreement Provides Path to Further Expansion of Nuclear Energy in China December 16, 2006 - 9:46am Addthis BEIJING, CHINA - U.S. Department of Energy (DOE) Secretary Samuel W. Bodman and Chinese Chairman of National Development and Reform Commission (NDRC) Ma Kai today signed a Memorandum of Understanding (MOU) that will pave the way for Westinghouse Electric Company to construct four civilian nuclear power plants in China. This agreement illustrates the United States government's support of the Chinese expansion and use of safe, emissions-free nuclear power and the related technology transfer. "This is an exciting day for the U.S. nuclear industry. This agreement is

Note: This page contains sample records for the topic "lpf leak path" 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

Initiative Guides Hawaii to the Path of Energy Independence | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Initiative Guides Hawaii to the Path of Energy Independence Initiative Guides Hawaii to the Path of Energy Independence Initiative Guides Hawaii to the Path of Energy Independence March 24, 2010 - 5:15pm Addthis The Hawaii Clean Energy Initiative's goal is to generate 70 percent of the state's power using clean energy such as wind. | Photo courtesy of the State of Hawaii. The Hawaii Clean Energy Initiative's goal is to generate 70 percent of the state's power using clean energy such as wind. | Photo courtesy of the State of Hawaii. With 90 percent of its energy coming from oil, Hawaii is the most oil-dependent state in the nation. The Hawaii Clean Energy Initiative is an ambitious plan to reverse that. A partnership between the state and the federal Department of Energy, the HCEI uses a combination of increased

462

EIS-0465: Pepco Holdings, Inc. Mid-Atlantic Power Path (MAPP) Project,  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

EIS-0465: Pepco Holdings, Inc. Mid-Atlantic Power Path (MAPP) EIS-0465: Pepco Holdings, Inc. Mid-Atlantic Power Path (MAPP) Project, Prince George's, Calvert, and Wicomico Counties, Maryland, and Sussex County, Delaware EIS-0465: Pepco Holdings, Inc. Mid-Atlantic Power Path (MAPP) Project, Prince George's, Calvert, and Wicomico Counties, Maryland, and Sussex County, Delaware Summary Pepco Holdings, Inc., cancelled its proposed Phase II of the Mid-Atlantic Power Pathway transmission line project and DOE cancelled preparation of an EIS on the potential environmental impacts of a proposed federal loan guarantee for the project. Public Comment Opportunities No public comment opportunities available at this time. Documents Available for Download March 4, 2011 EIS-0465: Notice of Intent to Prepare an Environmental Impact Statement

463

Path integration in the field of a topological defect: the case of dispiration  

E-Print Network (OSTI)

The motion of a particle in the field of dispiration (due to a wedge disclination and a screw dislocation) is studied by path integration. By gauging $SO(2) \\otimes T(1)$, first, we derive the metric, curvature, and torsion of the medium of dispiration. Then we carry out explicitly path integration for the propagator of a particle moving in the non-Euclidean medium under the influence of a scalar potential and a vector potential. We obtain also the winding number representation of the propagator by taking the non-trivial topological structure of the medium into account. We extract the energy spectrum and the eigenfunctions from the propagator. Finally we make some remarks for special cases. Particularly, paying attention to the difference between the result of the path integration and the solution of Schr\\"odinger's equation in the case of disclination, we suggest that Schr\\"odinger equation may have to be modified by a curvature term.

Akira Inomata; Georg Junker; James Raynolds

2011-10-10T23:59:59.000Z

464

Revitalized Board Lays Out New Path amid EM's Recent Underground Tank  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Revitalized Board Lays Out New Path amid EM's Recent Underground Revitalized Board Lays Out New Path amid EM's Recent Underground Tank Waste Successes Revitalized Board Lays Out New Path amid EM's Recent Underground Tank Waste Successes August 20, 2012 - 12:00pm Addthis Cement trucks transport a specially formulated grout that is pumped into two underground waste tanks at the Savannah River Site as part of work to close the massive structures. Cement trucks transport a specially formulated grout that is pumped into two underground waste tanks at the Savannah River Site as part of work to close the massive structures. A view of the interior of the Integrated Waste Treatment Unit at the Idaho site. A view of the interior of the Integrated Waste Treatment Unit at the Idaho site. Cement trucks transport a specially formulated grout that is pumped into two underground waste tanks at the Savannah River Site as part of work to close the massive structures.

465

On the Path to Low Cost Renewable Fuels, an Important Breakthrough |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

On the Path to Low Cost Renewable Fuels, an Important Breakthrough On the Path to Low Cost Renewable Fuels, an Important Breakthrough On the Path to Low Cost Renewable Fuels, an Important Breakthrough April 18, 2013 - 4:10pm Addthis NREL Scientist Bryon Donohoe looks at different views of ultra structures of pre-treated biomass materials in the Cellular Visualization room of the Biomass Surface Characterization Lab. | Photo by Dennis Schroeder, NREL. NREL Scientist Bryon Donohoe looks at different views of ultra structures of pre-treated biomass materials in the Cellular Visualization room of the Biomass Surface Characterization Lab. | Photo by Dennis Schroeder, NREL. A researcher examines a strain of the fermentation microorganism Zymomonas mobilis on a culture plate. NREL has genetically engineered and patented its own strains of Zymomonas mobilis to more effectively ferment the multiple sugars found in biomass as part of the cellulosic ethanol-to-renewable fuel conversion process. | Photo by Dennis Schroeder, NREL.

466

ARM - PI Product - Large Scale Ice Water Path and 3-D Ice Water Content  

NLE Websites -- All DOE Office Websites (Extended Search)

ProductsLarge Scale Ice Water Path and 3-D Ice Water ProductsLarge Scale Ice Water Path and 3-D Ice Water Content Comments? We would love to hear from you! Send us a note below or call us at 1-888-ARM-DATA. Send PI Product : Large Scale Ice Water Path and 3-D Ice Water Content Site(s) SGP TWP General Description Cloud ice water concentration is one of the most important, yet poorly observed, cloud properties. Developing physical parameterizations used in general circulation models through single-column modeling is one of the key foci of the ARM program. In addition to the vertical profiles of temperature, water vapor and condensed water at the model grids, large-scale horizontal advective tendencies of these variables are also required as forcing terms in the single-column models. Observed horizontal advection of condensed water has not been available because the

467

Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets  

NLE Websites -- All DOE Office Websites (Extended Search)

Determination of Ice Water Path Over the ARM SGP Using Determination of Ice Water Path Over the ARM SGP Using Combined Surface and Satellite Datasets J. Huang, M. M. Khaiyer, and P. W. Heck Analytical Services & Materials, Inc. Hampton, Virginia P. Minnis and B. Lin Atmospheric Sciences National Aeronautics and Space Administration Langley Research Center Hampton, Virginia T.-F. Fan Science Applications International Corporation Hampton, Virginia Introduction Global information of cloud ice water path (IWP) is urgently needed for testing of global climate models (GCMs) and other applications. Accurate quantification of the IWP is essential for characterizing the hydrological and radiation budget. For example, the reflection of shortwave radiation by ice clouds reduces the solar energy reaching the earth's surface. Ice clouds can also trap the longwave radiation

468

Step 2. Choose a compliance path within the applicable energy code |  

NLE Websites -- All DOE Office Websites (Extended Search)

2. Choose a compliance path within the applicable energy code 2. Choose a compliance path within the applicable energy code For some designers, an ideal energy code would tell them exactly what they need to do for their building. For other designers, being told exactly what they need to do might be viewed as limiting their creativity. Energy codes attempt to cater to both types of designers by offering multiple compliance paths within the code. BECP's Commercial Buildings for Architects Resource Guide (Resource 1) states the issue as An energy code's format can significantly influence design, sometimes more than the actual requirements. A prescriptive code clearly states what applies, but may limit design freedom and foster the view that the building is composed of separate, non-related systems. A performance-based code

469

From Salesman to CEO: A 45-year Path to Energy Efficiency | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

From Salesman to CEO: A 45-year Path to Energy Efficiency From Salesman to CEO: A 45-year Path to Energy Efficiency From Salesman to CEO: A 45-year Path to Energy Efficiency October 15, 2010 - 10:50am Addthis Ohio Governor Ted Strickland (left) got a tour of the New Horizons Baking Company with CEO Tim Brown this winter to announce the grant.| Photo courtesy of New Horizons Baking Company Ohio Governor Ted Strickland (left) got a tour of the New Horizons Baking Company with CEO Tim Brown this winter to announce the grant.| Photo courtesy of New Horizons Baking Company Stephen Graff Former Writer & editor for Energy Empowers, EERE What are the key facts? State Energy Program award helped New Horizons Baking Company purchase energy-efficient oven Oven is 25% more efficient and increased production by 20% Certified minority-owned company stays cost-competitive and retains

470

nmtopo-ctrlp.xsd - Types used for path specification and topology exchange  

NLE Websites -- All DOE Office Websites (Extended Search)

nmtopo-ctrlp.xsd - Types used for path nmtopo-ctrlp.xsd - Types used for path specification and topology exchange Services Overview ECS Audio/Video Conferencing Fasterdata IPv6 Network Network Performance Tools (perfSONAR) ESnet OID Registry PGP Key Service Virtual Circuits (OSCARS) OSCARS Case Study Documentation User Manual FAQ Design Specifications Functional Specifications Notifications Publications Authorization Policy Default Attributes Message Security Clients For Developers Interfaces Server api Client api WSDL files OSCARS.wsdl - OSCARS Service definition OSCARS.xsd - Types used in service messages OSCARS-Notify.wsdl - OSCARS Notify Broker service defintion nmtopo-ctrlp.xsd - Types used for path specification and topology exchange Links Hardware Requirements DOE Grids Service Transition Contact Us Technical Assistance:

471

Three path interference using nuclear magnetic resonance: a test of the consistency of Born's rule  

E-Print Network (OSTI)

The Born rule is at the foundation of quantum mechanics and transforms our classical way of understanding probabilities by predicting that interference occurs between pairs of independent paths of a single object. One consequence of the Born rule is that three way (or three paths) quantum interference does not exist. In order to test the consistency of the Born rule, we examine detection probabilities in three path intereference using an ensemble of spin-1/2 quantum registers in liquid state nuclear magnetic resonance (LSNMR). As a measure of the consistency, we evaluate the ratio of three way interference to two way interference. Our experiment bounded the ratio to the order of $10^{-3} \\pm 10^{-3}$, and hence it is consistent with Born's rule.

Daniel K. Park; Osama Moussa; Raymond Laflamme

2012-07-10T23:59:59.000Z

472

THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING WITH LEGAL  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING WITH LEGAL LIABILITY AND COMPENSATION FOR NUCLEAR DAMAGE THE COMPENSATION CONVENTION: PATH TO A GLOBAL REGIME FOR DEALING WITH LEGAL LIABILITY AND COMPENSATION FOR NUCLEAR DAMAGE The adoption of the Convention on Supplementary Compensation for Nuclear Damage (Compensation Convention) opens a new chapter in international nuclear liability law. The Compensation Convention provides the world community with the opportunity to deal with legal liability and compensation for nuclear damage through a global regime that includes all countries that operate nuclear powerplants (nuclear power generating countries) and most countries that do not operate nuclear powerplants (nonnuclear power generating countries). Such a global regime can remove

473

Insights into the mechanisms on chemical reactions: reaction paths for chemical reactions. [Li + HF; OH + H/sub 2/  

DOE Green Energy (OSTI)

We report reaction paths for two prototypical chemical reactions: Li + HF, an electron transfer reaction, and OH + H/sub 2/, an abstraction reaction. In the first reaction we consider the connection between the energetic terms in the reaction path Hamiltonian and the electronic changes which occur upon reaction. In the second reaction we consider the treatment of vibrational effects in chemical reactions in the reaction path formalism. 30 refs., 9 figs.

Dunning, T.H. Jr.; Rosen, E.; Eades, R.A.

1987-01-01T23:59:59.000Z

474

Self-consistent Green's functions calculation of the nucleon mean-free path  

E-Print Network (OSTI)

The extension of Green's functions techniques to the complex energy plane provides access to fully dressed quasi-particle properties from a microscopic perspective. Using self-consistent ladder self-energies, we find both spectra and lifetimes of such quasi-particles in nuclear matter. With a consistent choice of the group velocity, the nucleon mean-free path can be computed. Our results indicate that, for energies above 50 MeV at densities close to saturation, a nucleon has a mean-free path of 4 to 5 femtometers.

A. Rios; V. Soma

2011-09-22T23:59:59.000Z

475

Demonstration of an optical quantum controlled-NOT gate without path interference  

E-Print Network (OSTI)

We report the first experimental demonstration of an optical quantum controlled-NOT gate without any path interference, where the two interacting path interferometers of the original proposals (Phys. Rev. A {\\bf 66}, 024308 (2001), Phys. Rev. A {\\bf 65}, 012314 (2002)) have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittances and reflectances. The performance of the device is evaluated using a recently proposed method (Phys. Rev. Lett. {\\bf 94}, 160504 (2005)), by which the quantum process fidelity and the entanglement capability can be estimated from the 32 measurement results of two classical truth tables, significantly less than the 256 measurement results required for full quantum tomography.

Okamoto, R; Takeuchi, S; Sasaki, K; Okamoto, Ryo; Hofmann, Holger F.; Takeuchi, Shigeki; Sasaki, Keiji

2005-01-01T23:59:59.000Z

476

Demonstration of an optical quantum controlled-NOT gate without path interference  

E-Print Network (OSTI)

We report the first experimental demonstration of an optical quantum controlled-NOT gate without any path interference, where the two interacting path interferometers of the original proposals (Phys. Rev. A {\\bf 66}, 024308 (2001), Phys. Rev. A {\\bf 65}, 012314 (2002)) have been replaced by three partially polarizing beam splitters with suitable polarization dependent transmittances and reflectances. The performance of the device is evaluated using a recently proposed method (Phys. Rev. Lett. {\\bf 94}, 160504 (2005)), by which the quantum process fidelity and the entanglement capability can be estimated from the 32 measurement results of two classical truth tables, significantly less than the 256 measurement results required for full quantum tomography.

Ryo Okamoto; Holger F. Hofmann; Shigeki Takeuchi; Keiji Sasaki

2005-06-30T23:59:59.000Z

477

Manhattan Project: The Plutonium Path to the Bomb, 1942-1944  

Office of Scientific and Technical Information (OSTI)

Painting of CP-1 going critical THE PLUTONIUM PATH TO THE BOMB Painting of CP-1 going critical THE PLUTONIUM PATH TO THE BOMB (1942-1944) Events > The Plutonium Path to the Bomb, 1942-1944 Production Reactor (Pile) Design, 1942 DuPont and Hanford, 1942 CP-1 Goes Critical, December 2, 1942 Seaborg and Plutonium Chemistry, 1942-1944 Final Reactor Design and X-10, 1942-1943 Hanford Becomes Operational, 1943-1944 Plutonium, produced in a uranium-fueled reactor (pile), was the second path taken toward achieving an atomic bomb. Design work on a full-scale plutonium production reactor began at the Met Lab in June 1942. Scientists at the Met Lab had the technical expertise to design a production pile, but construction and management on an industrial scale required an outside contractor. General Groves convinced the DuPont Corporation to become the primary contractor for plutonium production. With input from the Met Lab and DuPont, Groves selected a site at Hanford, Washington, on the Columbia River, to build the full-scale production reactors.

478

Levy path integral approach to the solution of the fractional Schrödinger equation with infinite square well  

E-Print Network (OSTI)

The solution to the fractional Schr\\"odinger equation with infinite square well is obtained in this paper, by use of the L\\'evy path integral approach. We obtain the even and odd parity wave functions of this problem, which are in accordance with those given by Laskin in [Chaos 10 (2000), 780--790].

Dong Jianping

2013-01-14T23:59:59.000Z

479

Observations and design of public place and paths in a New England town  

E-Print Network (OSTI)

This is a plan - a hypothesis in which some ideas are developed for the building of a path and parks. Through the use of imagery texture, and materials a sense of the possible is evoked. This is also an exploration of ...

Compton, Ann, M. Arch. Massachusetts Institute of Technology

1984-01-01T23:59:59.000Z

480

Manhattan Project: The Uranium Path to the Bomb, 1942-1944  

Office of Scientific and Technical Information (OSTI)

Alpha Racetrack, Y-12 Electromagnetic Plant, Oak Ridge THE URANIUM PATH TO THE BOMB Alpha Racetrack, Y-12 Electromagnetic Plant, Oak Ridge THE URANIUM PATH TO THE BOMB (1942-1944) Events > The Uranium Path to the Bomb, 1942-1944 Y-12: Design, 1942-1943 Y-12: Construction, 1943 Y-12: Operation, 1943-1944 Working K-25 into the Mix, 1943-1944 The Navy and Thermal Diffusion, 1944 The uranium path to the atomic bomb ran through Oak Ridge, Tennessee. Only if the new plants built at Oak Ridge produced enough enriched uranium-235 would a uranium bomb be possible. General Groves placed two methods into production: 1) electromagnetic, based on the principle that charged particles of the lighter isotope would be deflected more when passing through a magnetic field; and 2) gaseous diffusion, based on the principle that molecules of the lighter isotope, uranium-235, would pass more readily through a porous barrier. Full-scale electromagnetic and gaseous diffusion production plants were built at Oak Ridge at sites designated as "Y-12" and "K-25", respectively.

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