Resource Type

States

Language

173 Matching Results

Results open in a new window/tab.

Oxidation of K-West Basin Spent Nuclear Fuel in Moist Helium Atmosphere (open access)

Oxidation of K-West Basin Spent Nuclear Fuel in Moist Helium Atmosphere

None
Date: June 15, 1999
Creator: Abrefah, J. & Sell, R. L.
System: The UNT Digital Library
Antiprotons and the Crystal Ball (open access)

Antiprotons and the Crystal Ball

During the 1998 running of the Crystal Ball experiment, a couple of brief test runs were done with the C6 beamline tuned to produce antiprotons. Specifically, one shift on July 29th produced runs 329-334 with the beam momentum set for 650 MeV/c, run 355 was done on July 31st with a 550 MeV/c beam momentum, and run 926-929 were obtained in a single shift on November 3rd, also with a beam momentum of 550 MeV/c. The beam tune for the November data was greatly superior to that of the July data, however. Therefore, only the November data have been analyzed in detail, and the results of this analysis are presented in this note. Due to the paucity of statistics that were obtained, it was decided not to attempt to publish the results. However, the results are valuable as a tool for planning a possible future program of dedicated measurements of antiproton-proton annihilation into all-neutral final states using the Crystal Ball. The data in fact show that the Crystal Ball with its large angular acceptance and multi-photon capability would be an excellent detector for such an experiment. Only one other such experiment (the Crystal Barrel experiment at CERN/LEAR) has ever been …
Date: November 15, 1999
Creator: Allgower, C. & Peaslee, D.
System: The UNT Digital Library
A Hybrid Hydrologic-Geophysical Inverse Technique for the Assessment and Monitoring of Leachates in the Vadose Zone (open access)

A Hybrid Hydrologic-Geophysical Inverse Technique for the Assessment and Monitoring of Leachates in the Vadose Zone

The objective of this study is to develop and field test a new, integrated Hybrid Hydrologic-Geophysical Inverse Technique (HHGIT) for characterization of the vadose zone at contaminated sites. This new approach to site characterization and monitoring can provide detailed maps of hydrogeological heterogeneity and the extent of contamination by combining information from 3D electric resistivity tomography (ERT) and/or 2D cross borehole ground penetrating radar (XBGPR) surveys, statistical information about heterogeneity and hydrologic processes, and sparse hydrologic data. Because the electrical conductivity and dielectric constant of the vadose zone (from the ERT and XBGPR measurements, respectively) can be correlated to the fluid saturation and/or contaminant concentration, the hydrologic and geophysical measurements are related.
Date: June 15, 1999
Creator: Alumbaugh, David L.; Yeh, Jim; Labrecque, Doug; Glass, Robert J.; Brainard, James & Rautman, Chris
System: The UNT Digital Library
Early Inflation and Cosmology in Theories with Sub-Millimeter Dimensions (open access)

Early Inflation and Cosmology in Theories with Sub-Millimeter Dimensions

We discuss early cosmology in theories where the fundamental Planck mass is close to the TeV scale. In such theories the standard model fields are localized to a (3 + 1)-dimensional wall with n new transverse sub-millimeter sized spatial dimensions. The topics touched upon include: early inflation that occurs while the size of the new dimensions are still small, the spectrum and magnitude of density perturbations, the post-inflation era of contraction of our world while the internal dimensions evolve to their final ''large'' radius, and the production of gravitons in the bulk during these two eras. The radion moduli problem is also discussed.
Date: March 15, 1999
Creator: Arkani-Hamed, Nima
System: The UNT Digital Library
Rapid asymmetric inflation and early cosmology in theories with sub-millimeter dimensions (open access)

Rapid asymmetric inflation and early cosmology in theories with sub-millimeter dimensions

It was recently pointed out that the fundamental Planck mass could be close to the TeV scale with the observed weakness of gravity at long distances being due the existence of new sub-millimeter spatial dimensions. In this picture the standard model fields are localized to a (3+1)-dimensional wall or ''3-brane''. We show that in such theories there exist attractive models of inflation that occur while the size of the new dimensions are still small. We show that it is easy to produce the required number of efoldings, and further that the density perturbations {delta}{rho}/{rho} as measured by COBE can be easily reproduced, both in overall magnitude and in their approximately scale-invariant spectrum. In the minimal approach, the inflaton field is just the moduli describing the size of the internal dimensions, the role of the inflationary potential being played by the stabilizing potential of the internal space. We show that under quite general conditions, the inflationary era is followed by an epoch of contraction of our world on the brane, while the internal dimensions slowly expand to their stabilization radius. We find a set of exact solutions which describe this behavior, generalizing the well-known Kasner solutions. During this phase, the production …
Date: March 15, 1999
Creator: Arkani-Hamed, Nima
System: The UNT Digital Library
Hog Prices: Questions and Answers (open access)

Hog Prices: Questions and Answers

This report discusses price changes in the pork industry. In late 1998, the lowest hog prices in decades created a crisis in the pork industry and prompted the U.S. Department of Agriculture (USDA) and Congress to take a series of actions to assist producers, including direct cash payments, and the purchase of extra pork products to reduce market supplies. The industry sought additional aid as low prices persisted into 1999.
Date: December 15, 1999
Creator: Becker, Geoffrey S.
System: The UNT Digital Library
Recommended Design Modifications and Operational Approaches to Allow Continued Precipitation Operations at Current ITP Facility (open access)

Recommended Design Modifications and Operational Approaches to Allow Continued Precipitation Operations at Current ITP Facility

The purpose of this report is to provide a set of recommended design modifications and operational approaches that would allow continued precipitation operations at the "current ITP facility".
Date: January 15, 1999
Creator: Blanchard, A.
System: The UNT Digital Library
Risk-Dominant Scenarios from Several SRS Facilities (open access)

Risk-Dominant Scenarios from Several SRS Facilities

This report and associated spreadsheets describe the SRS safety analysis provided for four selected transuranic storage and stabilization facilities. For each of the four sets of analysis, the bounding events in each frequency category are identified, key inputs and assumptions are stated, and final doses tabulated.
Date: March 15, 1999
Creator: Blanchard, A.
System: The UNT Digital Library
Safety Analysis: Evaluation of Accident Risks in the Transporation of Hazardous Materials by Truck and Rail at the Savannah River Plant (open access)

Safety Analysis: Evaluation of Accident Risks in the Transporation of Hazardous Materials by Truck and Rail at the Savannah River Plant

This report presents an analysis of the consequences and risks of accidents resulting from hazardous material transportation at the Savannah River Plant.
Date: April 15, 1999
Creator: Blanchard, A.
System: The UNT Digital Library
Solar Neutrino Physics (open access)

Solar Neutrino Physics

With its heavy water target, the Sudbury Neutrino Observatory (SNO) offers the unique opportunity to measure both the 8B flux of electron neutrinos from the Sun and, independently, the flux of all active neutrino species reaching the Earth. A model-independent test of the hypothesis that neutrino oscillations are responsible for the observed solar neutrino deficit can be made by comparing the charged-current (CC) and neutral-current (NC) rates. This LDRD proposal supported the research and development necessary for an assessment of backgrounds and performance of the SNO detector and the ability to extract the NC/CC-Ratio. Particular emphasis is put upon the criteria for deployment and signal extraction from a discrete NC detector array based upon ultra-low background 3He proportional counters.
Date: July 15, 1999
Creator: Bowles, T. J.; Brice, S. J.; Esch, E. -I.; Fowler, M. M.; Goldschmidt, A.; Hime, A. et al.
System: The UNT Digital Library
Initial Screening of Thermochemical Water-Splitting Cycles for High Efficiency Generation of Hydrogen Fuels Using Nuclear Power (open access)

Initial Screening of Thermochemical Water-Splitting Cycles for High Efficiency Generation of Hydrogen Fuels Using Nuclear Power

OAK B188 Initial Screening of Thermochemical Water-Splitting Cycles for High Efficiency Generation of Hydrogen Fuels Using Nuclear Power There is currently no large scale, cost-effective, environmentally attractive hydrogen production process, nor is such a process available for commercialization. Hydrogen is a promising energy carrier, which potentially could replace the fossil fuels used in the transportation sector of our economy. Fossil fuels are polluting and carbon dioxide emissions from their combustion are thought to be responsible for global warming. The purpose of this work is to determine the potential for efficient, cost-effective, large-scale production of hydrogen utilizing high temperature heat from an advanced nuclear power station. Almost 800 literature references were located which pertain to thermochemical production of hydrogen from water and over 100 thermochemical watersplitting cycles were examined. Using defined criteria and quantifiable metrics, 25 cycles have been selected for more detailed study.
Date: December 15, 1999
Creator: Brown, L. C.; Funk, J. F. & Showalter, S. K.
System: The UNT Digital Library
[Completion of the dog toxicity project at the University of Utah: statistical comparison] (open access)

[Completion of the dog toxicity project at the University of Utah: statistical comparison]

Radium (Ra) toxicity in dogs is a cornerstone for the evaluation of plutonium (Pu) toxicity, as it provides a possible link to Pu toxicity in humans. Survival regression models with covariates were used to estimate the risk to survival and the frequency and latency of bone tumor development. It appears for Ra that dose-rate is a more significant contributor to non-survival and bone tumors than is skeletal dose.
Date: December 15, 1999
Creator: Bruenger, F. W. & Lloyd, R. D.
System: The UNT Digital Library
Integrated computer control system CORBA-based simulator FY98 LDRD project final summary report (open access)

Integrated computer control system CORBA-based simulator FY98 LDRD project final summary report

The CORBA-based Simulator was a Laboratory Directed Research and Development (LDRD) project that applied simulation techniques to explore critical questions about distributed control architecture. The simulator project used a three-prong approach comprised of a study of object-oriented distribution tools, computer network modeling, and simulation of key control system scenarios. This summary report highlights the findings of the team and provides the architectural context of the study. For the last several years LLNL has been developing the Integrated Computer Control System (ICCS), which is an abstract object-oriented software framework for constructing distributed systems. The framework is capable of implementing large event-driven control systems for mission-critical facilities such as the National Ignition Facility (NIF). Tools developed in this project were applied to the NIF example architecture in order to gain experience with a complex system and derive immediate benefits from this LDRD. The ICCS integrates data acquisition and control hardware with a supervisory system, and reduces the amount of new coding and testing necessary by providing prebuilt components that can be reused and extended to accommodate specific additional requirements. The framework integrates control point hardware with a supervisory system by providing the services needed for distributed control such as database persistence, system …
Date: January 15, 1999
Creator: Bryant, R M; Holloway, F W & Van Arsdall, P J
System: The UNT Digital Library
Shock-Turbulence Interaction: Annotated Reference (open access)

Shock-Turbulence Interaction: Annotated Reference

This is the first of several, informal technical memos in which I will attempt both a ''memory dump'' and an update on past and present research on shock wave-turbulence interaction. Despite decades of attention, questions remain about wily, how, and to what degree shock interaction with V-existing turbulence amplifies the turbulence, extends its active range and, consequently, has the potential to significantly increase the average level of turbulent component mixing. (As used here, pre-existing turbulence is defined as an initial state of fluid. dynamic turbulence which has been produced independently and prior to encountering the shock wave). However, much as in the underlying, unresolved problem of fluid dynamic turbulence, a general solution is not sought (even if such an unlikely goal could be considered attainable in a professional lifetime). Instead, our more limited (but achievable) goal is to elevate our understanding of the phenomena by combining scaleable experiments, appropriately sensitive diagnostic techniques, approximating model developments, and analysis. We also hope to attain a reasonable level of confidence in our ability to estimate the influence of the phenomena when subjected to a range of thermo-physical states and flow conditions of programmatic interest. Additionally, this review should help establish a carefully evaluated …
Date: September 15, 1999
Creator: Buckingham, A.C.
System: The UNT Digital Library
Nitrate and Perchlorate removal from groundwater by ion exchange (open access)

Nitrate and Perchlorate removal from groundwater by ion exchange

This study was conducted to evaluate the performance of a small scale ion exchange unit (Krudico, Inc of Auborn, IA) for removal of nitrate and perchlorate from groundwater at Lawrence Livermore National Laboratory's Site 300. The unit was able to treat 3,600 gallons of Site 300 groundwater, at an average influent concentration of 100 mg/L NO{sub 3}{sup -} before breakthrough occurred. The unit contained 2.5 ft{sup 3} of Sybron SR-7 resin. Seventy gallons of regeneration waste were generated (water treated to waste ratio of 51:1). The effluent concentration was about 20 mg/L NO{sub 3}{sup -}, which is equivalent to a treatment efficiency of at least 80%. There are several options for implementing this technology at Site 300. A target well, in the 817 area, has been selected. It has a 3 to 4 gpm flow rate, and concentrations of 90 mg/L NO{sub 3}{sup -} and 40 {micro}g/L perchlorate. The different treatment options include ion exchange treatment of nitrate only, nitrate and perchlorate, or perchlorate only. Option 1: For the treatment of nitrate only, this unit will be able to treat 3,700 gallons of water before regeneration is required. If both columns of the ion exchange unit are used, 7,400 gallons …
Date: September 15, 1999
Creator: Burge, S & Halden, R
System: The UNT Digital Library
Cash and Noncash Benefits for Persons With Limited Income: Eligibility Rules, Recipient and Expenditure Data, FY1996-FY1998 (open access)

Cash and Noncash Benefits for Persons With Limited Income: Eligibility Rules, Recipient and Expenditure Data, FY1996-FY1998

This report provides basic eligibility rules, recipient numbers, and FY1996-FY1998 expenditure data for 80 programs that have provided cash or non-cash benefits to low-income persons.
Date: December 15, 1999
Creator: Burke, Vee
System: The UNT Digital Library
300 Area Treated Effluent Disposal Facility (TEDF) Hazards Assessment (open access)

300 Area Treated Effluent Disposal Facility (TEDF) Hazards Assessment

This document establishes the technical basis in support of emergency planning activities for the 300 Area Treated Effluent Disposal Facility. The technical basis for project-specific Emergency Action Levels and Emergency Planning Zone is demonstrated.
Date: January 15, 1999
Creator: CAMPBELL, L.R.
System: The UNT Digital Library
3Q/4Q98 Annual M-Area and Metallurgical Laboratory Hazardous Waste Management Facility Groundwater Monitoring and Correction-Action Report, Volumes I, II, and III (open access)

3Q/4Q98 Annual M-Area and Metallurgical Laboratory Hazardous Waste Management Facility Groundwater Monitoring and Correction-Action Report, Volumes I, II, and III

This report describes the groundwater monitoring and corrective-action program at the M-Area Hazardous Waste Management Facility (HWMF) and the Metallurgical Laboratory (Met Lab) HWMF at the Savannah River Site (SRS) during 1998.
Date: April 15, 1999
Creator: Chase, J.
System: The UNT Digital Library
High-Level Waste Tanks Multi-Dimensional Contaminant Transport Model Development (open access)

High-Level Waste Tanks Multi-Dimensional Contaminant Transport Model Development

A suite of multi-dimensional computer models was developed to analyze the transport of residual contamination from high-level waste tanks through the subsurface to seeplines. Cases analyzed ranged from all the tanks in the F- and H-tank farms for an overall look; to the Tank 17-20 4-pack to study plume interaction; to individual tanks, such as Tank 17 and 20 for comparison with one-dimensional and modeling. The main purpose of this work was to develop and test the models, so only two relatively conservative contaminants were examined, Tc-99 and I-129. More complex analyses, such as solubility-limited species and radionuclides that head a decay chain were not addressed in this study.
Date: November 15, 1999
Creator: Collard, L.B.
System: The UNT Digital Library
Radiation Physics for Personnel and Environmental Protection (open access)

Radiation Physics for Personnel and Environmental Protection

The Fermi National Accelerator Laboratory FERMILAB- TM- 1834 Fermi National Accelerator Laboratory This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or any agency thereof. This manuscript has been authored by Universities Research Association, Inc. under con- tract No. DE- ACO% 76CH03000 with the U. S. Department of Energy. The United States Government and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid- up, irrevocable, worldwide license to publish or reproduce the published …
Date: February 15, 1999
Creator: Cossairt, J.D.
System: The UNT Digital Library
Application of Seismic Design Requirements to Cold Vacuum Drying (CVD) Facility Structures and Systems and Components (open access)

Application of Seismic Design Requirements to Cold Vacuum Drying (CVD) Facility Structures and Systems and Components

The methodology followed in assignment of Performance Class (PC) for Natural Phenomena Hazards (NPH) seismic loads for Cold Vacuum Drying Facility (CVDF) Structures, Systems and Components is defined. The loading definition associated with each PC and structure, system and component is then defined.
Date: November 15, 1999
Creator: Crea, B. A.
System: The UNT Digital Library
In-Tank Processing (ITP) Geotechnical Summary Report (open access)

In-Tank Processing (ITP) Geotechnical Summary Report

A geotechnical investigation has been completed for the In Tank Processing Facility (ITP) which consists of buildings 241-96H and 241-32H; and Tanks 241-948H, 241-949H, 241-950H, and 241-951H. The investigation consisted of a literature search for relevant technical data, field explorations, field and laboratory testing, and analyses. This document presents a summary of the scope and results to date of the investigations and engineering analyses for these facilities. A final geotechnical report, which will include a more detailed discussion and all associated boring logs, laboratory test results, and analyses will be issued in October 1994.The purpose of the investigation is to obtain geotechnical information to evaluate the seismic performance of the foundation materials and embankme nts under and around the ITP. The geotechnical engineering objectives of the investigation are to: 1) define the subsurface stratigraphy, 2) obtain representative engineering properties of the subsurface materials, 3) assess the competence of the subsurface materials under static and dynamic loads, 4) derive properties for seismic soil-structure interaction analysis, 5) evaluate the areal and vertical extent of horizons that might cause dynamic settlement or instability, and 6) determine settlement at the foundation level of the tanks.
Date: January 15, 1999
Creator: Cumbest, R. J.
System: The UNT Digital Library
Radionuclide Air Emissions Report for the Hanford Site Calendar year 1998 (open access)

Radionuclide Air Emissions Report for the Hanford Site Calendar year 1998

This report documents radionuclide air emissions from the Hanford Site in I998 and the resulting effective dose equivalent to the maximally exposed individual (MEI) member of the public. The report has been prepared in accordance with the Code of Federal Regulations, Title 40, Protection of the Environment, Part 61, National Emission Standards for Hazardous Air Pollutants (40 CFR SI), Subpart H, ''National Emission Standards for Emissions of Radionuclides Other than Radon from Department of Energy Facilities,'' and with the Washington Administrative Code Chapter 246-247, Radiation Protection--Air Emissions. The federal regulations in 40 CFR 61, Subpart H; require the measurement and reporting of radionuclides emitted from Department of Energy facilities and the resulting offsite dose from those emissions. A standard of 10 mrem/yr effective dose equivalent (EDE) is imposed on them. The EDE to the MEI due to routine emissions in 1998 from Hanford Site point sources was 1.3 E-02 mrem (1.3 E-04 mSv), which is 0.13 percent of the federal standard. Chapter 246-247 of the Washington Administrative Code (WAC) requires the reporting of radionuclide emissions from all Department of Energy Hanford Site sources. The state has adopted into these regulations the 40 CFR 61 standard of 10 mrem/yr EDE. The …
Date: June 15, 1999
Creator: DIEDIKER, L.P.
System: The UNT Digital Library
Diesel Emission Control -- Sulfur Effects (DECSE) Program; Phase I Interim Data Report No. 1 (open access)

Diesel Emission Control -- Sulfur Effects (DECSE) Program; Phase I Interim Data Report No. 1

The Diesel Emission Control-Sulfur Effects (DECSE) is a joint government/industry program to determine the impact of diesel fuel sulfur levels on emission control systems whose use could lower emissions of nitrogen oxides (NO{sub x}) and particulate matter (PM) from on-highway trucks in the 2002--2004 model years. Phase 1 of the program was developed with the following objectives in mind: (1) evaluate the effects of varying the level of sulfur content in the fuel on the emission reduction performance of four emission control technologies; and (2) measure and compare the effects of up to 250 hours of aging on selected devices for multiple levels of fuel sulfur content. This interim data report summarizes results as of August, 1999, on the status of the test programs being conducted on three technologies: lean-NO{sub x} catalysts, diesel particulate filters and diesel oxidation catalysts.
Date: August 15, 1999
Creator: DOE; ORNL; NREL; EMA & MECA
System: The UNT Digital Library