Resource Type

Defense Infrastructure: Actions Taken to Improve the Management of Utility Privatization, but Some Concerns Remain (open access)

Defense Infrastructure: Actions Taken to Improve the Management of Utility Privatization, but Some Concerns Remain

A letter report issued by the Government Accountability Office with an abstract that begins "Department of Defense (DOD) installations have about 2,600 electric, water, wastewater, and natural gas utility systems valued at about $50 billion. In 1997, DOD decided that privatization was the preferred method for improving utility systems, and Congress approved legislative authority for privatizing DOD's utility systems with Public Law No. 105-85. DOD estimates that some utility privatization contracts will cost over $100 million. In a May 2005 report, GAO identified several management weaknesses in DOD's implementation of the program. The Fiscal Year 2006 National Defense Authorization Act required GAO to evaluate and report on changes to the utility privatization program since May 2005. Accordingly, this report updates the status of the program and discusses the effect of DOD's changes on the concerns noted last year. To conduct this review, GAO summarized program status and costs, assessed DOD's changes to program guidance and in other areas, and reviewed the services' implementation of the changes."
Date: September 5, 2006
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Health-Care-Associated Infections in Hospitals: An Overview of State Reporting Programs and Individual Hospital Initiatives to Reduce Certain Infections (open access)

Health-Care-Associated Infections in Hospitals: An Overview of State Reporting Programs and Individual Hospital Initiatives to Reduce Certain Infections

A letter report issued by the Government Accountability Office with an abstract that begins "Health-care-associated infections (HAI) are infections that patients acquire while receiving treatment for other conditions. Normally treated with antimicrobial drugs, HAIs are a growing concern as exposure to multidrug-resistant organisms (MDRO) becomes more common. Infections caused by MDROs, such as methicillin-resistant Staphylococcus aureus (MRSA), lead to longer hospital stays, higher treatment costs, and higher mortality. In response to demands for more public information on HAIs, some states began to establish HAI public reporting systems. The federal Centers for Disease Control and Prevention (CDC) developed a system--the National Healthcare Safety Network (NHSN)--to collect HAI data from hospitals and some states have chosen to use it for their programs. In addition, some hospitals have adopted initiatives to reduce MRSA by routinely testing some or all patients and isolating those who test positive for MRSA from contact with other patients. GAO was asked to examine (1) the design and implementation of state HAI public reporting systems, (2) the initiatives hospitals have undertaken to reduce MRSA infections, and (3) the experience of certain early-adopting hospitals in overcoming challenges to implement such initiatives. GAO interviewed state officials, reviewed documents, and surveyed or …
Date: September 5, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Defense Business Transformation: Achieving Success Requires a Chief Management Officer to Provide Focus and Sustained Leadership (open access)

Defense Business Transformation: Achieving Success Requires a Chief Management Officer to Provide Focus and Sustained Leadership

A letter report issued by the Government Accountability Office with an abstract that begins "In 2005, GAO added the Department of Defense's (DOD) approach to business transformation to its high-risk list because (1) DOD's improvement efforts were fragmented, (2) DOD lacked an integrated and enterprisewide business transformation plan, and (3) DOD had not designated a senior official at the right level with the right authority to be responsible for overall business transformation efforts. This report assesses (1) the progress DOD has made in setting up a management framework for overall business transformation efforts and (2) the challenges DOD faces in maintaining and ensuring the success of those efforts. GAO conducted this work under the Comptroller General's authority to conduct evaluations under his own initiative. In conducting its work, GAO compared DOD's actions to key practices of successful transformations."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
National Flood Insurance Program: FEMA's Management and Oversight of Payments for Insurance Company Services Should Be Improved (open access)

National Flood Insurance Program: FEMA's Management and Oversight of Payments for Insurance Company Services Should Be Improved

A letter report issued by the Government Accountability Office with an abstract that begins "Extraordinary recent flood events raise serious questions about the solvency of the National Flood Insurance Program (NFIP), which is administered by the Federal Emergency Management Agency (FEMA). The NFIP is largely implemented by private insurance companies that sell and service policies and adjust claims under the Write Your Own (WYO) Program. This report, prepared under the authority of the Comptroller General, examines (1) how much FEMA paid the WYO companies in recent years for operating costs and how FEMA determined payment amounts; (2) how FEMA's approach to determining operating costs assures that payments are reasonable estimates of companies' expenses; and (3) how FEMA assures that financial and management controls are in place for the WYO program and operate as intended. To do these assessments, GAO interviewed FEMA and insurance officials, and analyzed statutes, regulations, payment data, methodologies, and audits of WYO companies."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Medicare Part D Low-Income Subsidy: Assets and Income Are Both Important in Subsidy Denials, and Access to State and Manufacturer Drug Programs Is Uneven (open access)

Medicare Part D Low-Income Subsidy: Assets and Income Are Both Important in Subsidy Denials, and Access to State and Manufacturer Drug Programs Is Uneven

A letter report issued by the Government Accountability Office with an abstract that begins "To help defray the cost of prescription drugs for beneficiaries with limited means, the Medicare Prescription Drug, Improvement, and Modernization Act of 2003 (MMA) included the low-income subsidy (LIS) in the Part D prescription drug insurance program. To qualify for the LIS, beneficiaries must be enrolled in a Part D plan and their assets and income must be less than the thresholds established by the law. Part D is administered by the Centers for Medicare & Medicaid Services (CMS), and the Social Security Administration (SSA) administers the eligibility determination for the LIS. The MMA directed GAO to compare the utilization of and access to Part D prescription drugs among beneficiaries who received the LIS with those who were denied it because of the amount of their assets. This report focuses on beneficiaries' access to prescription drugs by examining (1) the importance of assets and income in LIS denials in 2006 and 2007, and (2) state and manufacturer programs providing access to prescription drugs for Medicare beneficiaries. To do this, GAO analyzed data from SSA, reviewed information on state and drug manufacturer pharmaceutical programs, and interviewed officials …
Date: September 5, 2008
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Special Operations Forces: Management Actions Are Needed to Effectively Integrate Marine Corps Forces into the U.S. Special Operations Command (open access)

Special Operations Forces: Management Actions Are Needed to Effectively Integrate Marine Corps Forces into the U.S. Special Operations Command

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) has relied on special operations forces to conduct military operations in Afghanistan and Iraq and to perform other tasks such as training foreign military forces. To meet the demand for these forces, DOD established a Marine Corps service component under the U.S. Special Operations Command (USSOCOM) to integrate Marine Corps forces. Under the authority of the Comptroller General, GAO assessed the extent to which (1) the Marine Corps special operations command has identified its force structure requirements, (2) the Marine Corps has developed a strategic human capital approach to manage personnel in its special operations command, and (3) USSOCOM has determined whether Marine Corps training programs are preparing its forces for assigned missions. GAO performed its work with the Marine Corps and USSOCOM and analyzed DOD plans for this new command."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
No Child Left Behind Act: Education Should Clarify Guidance and Address Potential Compliance Issues for Schools in Corrective Action and Restructuring Status (open access)

No Child Left Behind Act: Education Should Clarify Guidance and Address Potential Compliance Issues for Schools in Corrective Action and Restructuring Status

A letter report issued by the Government Accountability Office with an abstract that begins "The No Child Left Behind Act of 2001 (NCLBA) focused national attention on improving schools so that all students reach academic proficiency by 2014. In the 2006- 2007 school year, about 4,500 of the 54,000 Title I schools failed to make adequate yearly progress (AYP) for 4 or more years. Schools that miss AYP for 4 years are identified for corrective action, and after 6 years, they must be restructured. GAO examined (1) the characteristics of Title I schools in corrective action and restructuring; (2) the actions that schools in corrective action and restructuring implemented; (3) the assistance those schools received from districts and states; and (4) how Education supports states in their efforts to assist these schools. GAO administered two Web-based surveys to a nationwide sample of schools in corrective action and restructuring status and conducted site visits to five states."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
General Services Administration: Improvements Needed in Managing Delegated Authority of Real Property Activities (open access)

General Services Administration: Improvements Needed in Managing Delegated Authority of Real Property Activities

A letter report issued by the Government Accountability Office with an abstract that begins "The General Services Administration (GSA) issues different types of delegations, whereby agencies may request authority to perform certain real property activities, such as leasing space and maintaining property. Effective management of the program is critical to ensuring that federal dollars are well spent and adequate workspace is provided. GAO was asked to determine (1) what real property authority GSA has delegated to its tenant agencies, (2) what policies GSA used to manage delegated authority, and (3) reasons the tenant agencies requested delegated authority. GAO reviewed the law, federal regulations, and GSA policies relating to six types of delegated authority and interviewed GSA officials and officials from six select tenant agencies. GAO analyzed GSA data on delegations issued from fiscal years 1996 to 2006."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Privacy: Domestic and Offshore Outsourcing of Personal Information in Medicare, Medicaid, and TRICARE (open access)

Privacy: Domestic and Offshore Outsourcing of Personal Information in Medicare, Medicaid, and TRICARE

A letter report issued by the Government Accountability Office with an abstract that begins "Federal contractors and state Medicaid agencies are responsible for the day-to-day operations of the Medicare, Medicaid, and TRICARE programs. Because these entities may contract with vendors to perform services involving the use of personal health data, outsourcing and privacy protections are of interest. GAO surveyed all federal Medicare and TRICARE contractors and all state Medicaid agencies (a combined total of 378 entities) to examine whether they (1) outsource services--domestically or offshore--and (2) must notify federal agencies when privacy breaches occur. Survey response rates ranged from 69 percent for Medicare Advantage contractors to 80 percent for Medicaid agencies. GAO interviewed officials at the Department of Health and Human Services' Centers for Medicare & Medicaid Services (CMS), which oversees Medicare and Medicaid, and the Department of Defense's TRICARE Management Activity (TMA), which oversees TRICARE."
Date: September 5, 2006
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
National Emergency Grants: Labor Has Improved Its Grant Award Timeliness and Data Collection, but Further Steps Can Improve Process (open access)

National Emergency Grants: Labor Has Improved Its Grant Award Timeliness and Data Collection, but Further Steps Can Improve Process

A letter report issued by the Government Accountability Office with an abstract that begins "Between January 2004 and December 2005, more than 30,000 mass layoffs involving 50 or more workers occurred in the United States, causing more than 3.4 million workers to lose their jobs. National emergency grants expand services to laid-off workers when other state and federal programs are insufficient to meet their needs. GAO assessed (1) whether Labor has shortened grant award times since GAO's 2004 report and was meeting own timeliness goal, (2) the uniformity of the program data that Labor now collects, and (3) Labor's oversight of national emergency grant projects. To address these objectives, GAO analyzed information for program year 2004 and the first 2 quarters of 2005 and compared it with data collected for program years 2000- 2002."
Date: September 5, 2006
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Force Structure: DOD Needs to Integrate Data into Its Force Identification Process and Examine Options to Meet Requirements for High-Demand Support Forces (open access)

Force Structure: DOD Needs to Integrate Data into Its Force Identification Process and Examine Options to Meet Requirements for High-Demand Support Forces

A letter report issued by the Government Accountability Office with an abstract that begins "Since the terrorist attacks of September 11, 2001, the war on terrorism has dominated the global security environment. Ongoing overseas operations and heavy reliance on reservists have raised concerns about how the Department of Defense (DOD) will continue to meet its requirements using an all-volunteer force. The Army, in particular, has faced continuing demand for large numbers of forces, especially for forces with support skills. GAO was mandated to examine the extent of DOD's reliance on personnel with high-demand skills and its efforts to reduce or eliminate reliance on these personnel. Accordingly, GAO assessed (1) the combat support and combat service support skills that are in high demand and the extent to which DOD officials have visibility over personnel who are available for future deployment and (2) the extent to which DOD has conducted a comprehensive, data-driven analysis of alternatives for providing needed skills."
Date: September 5, 2006
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
World Trade Center: EPA's Most Recent Test and Clean Program Raises Concerns That Need to Be Addressed to Better Prepare for Indoor Contamination Following Disasters (open access)

World Trade Center: EPA's Most Recent Test and Clean Program Raises Concerns That Need to Be Addressed to Better Prepare for Indoor Contamination Following Disasters

A letter report issued by the Government Accountability Office with an abstract that begins "The September 11, 2001, terrorist attacks and World Trade Center (WTC) collapse blanketed Lower Manhattan in dust from building debris. In response, the Environmental Protection Agency (EPA) conducted an indoor clean and test program from 2002 to 2003. In 2003, EPA's Inspector General (IG) recommended improvements to the program and identified lessons learned for EPA's preparedness for future disasters. In 2004, EPA formed an expert panel to, among other goals, guide EPA in developing a second voluntary program; EPA announced this program in 2006. As requested, GAO's report primarily addresses EPA's second program, including the (1) extent to which EPA incorporated IG and expert panel member recommendations and input; (2) factors, if any, limiting the expert panel's ability to meet its goals; (3) completeness of information EPA provided to the public; (4) way EPA estimated resources for the program; and (5) extent to which EPA has acted upon lessons learned regarding indoor contamination from disasters."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Internet Privacy: Agencies' Efforts to Implement OMB's Privacy Policy (open access)

Internet Privacy: Agencies' Efforts to Implement OMB's Privacy Policy

A letter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on whether agencies were adhering to the Office of Management and Budget's (OMB) memorandum requiring federal agencies to post privacy policies on their Internet Websites, focusing on: (1) whether agencies have clearly labelled and easily accessed privacy policies posted on their principal Web sites; (2) whether agencies' privacy policies posted on their principal Web sites inform visitors about what information an agency collects, why the agency collects it, and how the agency will use the information; (3) how selected agencies have interpreted the requirement to post privacy policies at major entry points; and (4) whether selected agencies have posted privacy policies on Web pages where the agency collects substantial personal information or when applicable, notices that refer to the Privacy Act of 1974."
Date: September 5, 2000
Creator: United States. General Accounting Office.
System: The UNT Digital Library
SSA Disability: Enhanced Procedures and Guidance Could Improve Service and Reduce Overpayments to Concurrent Beneficiaries (open access)

SSA Disability: Enhanced Procedures and Guidance Could Improve Service and Reduce Overpayments to Concurrent Beneficiaries

A letter report issued by the General Accounting Office with an abstract that begins "In calendar year 2001, the Social Security Administration (SSA) paid cash benefits of $60 billion to more than six million working-age adults with disabilities and eligible family members under its Social Security Disability Insurance (DI) program, and $20 billion to more than 3.5 million working-age adults with disabilities under the Supplemental Security Income (SSI) program. Some beneficiaries, known as concurrent beneficiaries, receive cash and medical benefits from both programs. Concurrent beneficiaries comprised about 14 percent of SSA's disability population; 58 percent have mental impairments, and about 53 percent are female. Eleven percent of concurrent beneficiaries worked and earned a median income of approximately $250 per month. There is little coordination between SSI and DI program rules for individuals who work and receive benefits from both programs concurrently. Because most field office staff specialize in one program, they may not be sufficiently knowledgeable of the procedures for the other program to ensure that concurrent beneficiaries who work are paid the appropriate benefit amount under both programs. Applying both SSI and DI program rules to concurrent beneficiaries may make it difficult for them to make informed decisions about …
Date: September 5, 2002
Creator: United States. General Accounting Office.
System: The UNT Digital Library
Mine Safety: MSHA Devotes Substantial Effort to Ensuring the Safety and Health of Coal Miners, but Its Programs Could Be Strengthened (open access)

Mine Safety: MSHA Devotes Substantial Effort to Ensuring the Safety and Health of Coal Miners, but Its Programs Could Be Strengthened

A letter report issued by the General Accounting Office with an abstract that begins "Despite a drop in injury and fatality rates since the formation of the Department of Labor's Mine Safety and Health Administration (MSHA), mining is still a dangerous industry. Focusing on underground coal mines, GAO assessed how well MSHA oversees its process for reviewing and approving critical types of mine plans and the extent to which MSHA's inspections and accident investigations processes help ensure the safety and health of underground coal miners."
Date: September 5, 2003
Creator: United States. General Accounting Office.
System: The UNT Digital Library
Workforce Investment Act: Interim Report on Status of Spending and States' Available Funds (open access)

Workforce Investment Act: Interim Report on Status of Spending and States' Available Funds

A letter report issued by the General Accounting Office with an abstract that begins "The Workforce Investment Act (WIA) of 1998 made sweeping changes to federal employment and training programs. The act sought to unify previously fragmented programs and create a more comprehensive workforce investment system by bringing together most federally funded employment and training services into a single service delivery system known as the one-stop center system. The administration has twice proposed reducing the program's budget, citing the large amounts of unexpended funds that states carried over from the prior year. State and local workforce officials, however, have requested more funding in light of current economic conditions. GAO found that the Department of Labor lacks accurate information on states' WIA spending because of reporting inconsistencies--all states do not report expenditures or commitments in the same way. To determine how states manage their spending, Labor has established its own spending benchmarks, using them to access whether states are on track with their spending, to target technical assistance, and to formulate budget requests. Several factors affect when expenditures occur or are reported. State officials said that cumbersome processes to get spending approval, lengthy contract procurement procedures, and untimely billing by key …
Date: September 5, 2002
Creator: United States. General Accounting Office.
System: The UNT Digital Library
Kennedy Center: Improvements Needed to Strengthen the Management and Oversight of the Construction Process (open access)

Kennedy Center: Improvements Needed to Strengthen the Management and Oversight of the Construction Process

A letter report issued by the General Accounting Office with an abstract that begins "In the mid-1990s, John F. Kennedy Center for the Performing Arts (Kennedy Center) officials recognized a need for additional parking and better site access. As a precursor to a planned project to construct an 8-acre plaza and two additional buildings at the site, the Kennedy Center is currently in the process of constructing a garage expansion and site improvement project. GAO did this study because of congressional concerns over project delays and costs as well as challenges that the Kennedy Center faces as it pursues this major construction effort. GAO's objectives were to (1) compare the garage expansion and site improvement project's current costs, time frames, and scope with the estimates provided to congressional stakeholders in 1997 and 1998 and (2) identify what challenges the Kennedy Center faces in managing large construction projects."
Date: September 5, 2003
Creator: United States. General Accounting Office.
System: The UNT Digital Library
Defense Acquisitions: DOD's Research and Development Budget Requests to Congress Do Not Provide Consistent, Complete, and Clear Information (open access)

Defense Acquisitions: DOD's Research and Development Budget Requests to Congress Do Not Provide Consistent, Complete, and Clear Information

A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) asked Congress for $73.2 billion in fiscal year 2007 for research, development, testing, and evaluation (RDT&E). DOD organized this request using program element (PE) codes, which are designed to convey key information about the budget request. DOD also provides documents called budget exhibits detailing the activities for which funds are being requested. The National Defense Authorization Act for Fiscal Year 2006 mandated that GAO examine the program elements and budget exhibits. GAO assessed (1) whether the RDT&E program element code structure and the associated budget exhibits provide accurate, consistent, complete, and clear information, and (2) what factors contribute to any problems found. In conducting this review GAO analyzed all of the fiscal year 2007 program element codes and 47 budget exhibits. GAO also interviewed key DOD officials."
Date: September 5, 2007
Creator: United States. Government Accountability Office.
System: The UNT Digital Library
Combining Equations of State in Kull (open access)

Combining Equations of State in Kull

For ICF applications, the temperatures are hot enough that materials can transition to an atomic state or plasma. If we are simulating an ICF capsule, then either thru ALE, physical diffusion, transmutation by nuclear reactions, a mix model, or numerical diffusion (if we are running an Eulerian code), we will generate zones that contain multiple materials. It may be desired to treat certain mixtures of materials or mixed zones as atomic mixtures rather than as chunk mixtures. For example, suppose we have a deuterated material that is initially separated from a tritiated material. As these quantities come into contact at the atomic level, high energy neutrons will be generated from the D + T reaction. However, if we had a chunk of deuterium and a chunk of tritium in the same computational zone, then the D + T reaction would not take place. In dealing with atomic mixtures, two topics that immediately come to mind are mixed equations of state and mixed opacities. This report will only focus on the equation of state (EOS) aspect and its implementation in the Kull code. Imagine we have a zone that contains an atomic mixture of plastic and steel. If we know the …
Date: September 5, 2006
Creator: Ulitsky, M; Zimmerman, G & Renard, P
System: The UNT Digital Library
User's Manual for RESRAD-OFFSITE Version 2. (open access)

User's Manual for RESRAD-OFFSITE Version 2.

The RESRAD-OFFSITE code is an extension of the RESRAD (onsite) code, which has been widely used for calculating doses and risks from exposure to radioactively contaminated soils. The development of RESRAD-OFFSITE started more than 10 years ago, but new models and methodologies have been developed, tested, and incorporated since then. Some of the new models have been benchmarked against other independently developed (international) models. The databases used have also expanded to include all the radionuclides (more than 830) contained in the International Commission on Radiological Protection (ICRP) 38 database. This manual provides detailed information on the design and application of the RESRAD-OFFSITE code. It describes in detail the new models used in the code, such as the three-dimensional dispersion groundwater flow and radionuclide transport model, the Gaussian plume model for atmospheric dispersion, and the deposition model used to estimate the accumulation of radionuclides in offsite locations and in foods. Potential exposure pathways and exposure scenarios that can be modeled by the RESRAD-OFFSITE code are also discussed. A user's guide is included in Appendix A of this manual. The default parameter values and parameter distributions are presented in Appendix B, along with a discussion on the statistical distributions for probabilistic analysis. …
Date: September 5, 2007
Creator: Yu, C.; Gnanapragasam, E.; Biwer, B. M.; Kamboj, S.; Cheng, J. J.; Klett, T. et al.
System: The UNT Digital Library
AN INTEGRATED RELAP5-3D AND MUTLIPHASE CFD CODE SYSTEM UTILIZING A SEMI-implicit coupling technique (open access)

AN INTEGRATED RELAP5-3D AND MUTLIPHASE CFD CODE SYSTEM UTILIZING A SEMI-implicit coupling technique

An integrated code system consisting of RELAP5-3D and a multiphase CFD program has been created through the use of a generic semi-implicit coupling algorithm. Unlike previous CFD coupling work, this coupling scheme is numerically stable provided the material Courant limit is not violated in RELAP5-3D or at the coupling locations. The basis for the coupling scheme and details regarding the unique features associated with the application of this technique to a four-field CFD program are presented. Finally, the results of a verification problem are presented. The coupled code system is shown to yield accurate and numerically stable results.
Date: September 5, 2001
Creator: Aumiller, D.L., Tomlinson, E.T., and Weaver, W.L.
System: The UNT Digital Library
Employee Handbook (open access)

Employee Handbook

Welcome to Berkeley Lab. You are joining or are already a part of a laboratory with a sterling tradition of scientific achievement, including eleven Nobel Laureates and thirteen National Medal of Science winners. No matter what job you do, you make Berkeley Lab the outstanding organization that it is. Without your hard work and dedication, we could not achieve all that we have. We value you and thank you for choosing to be part of our community. This Employee Handbook is designed to help you navigate the Lab. With over 3,000 employees, an additional 3,000 guests visiting from countries around the world, a 200-acre campus and many policies and procedures, learning all the ins and outs may seem overwhelming, especially if you're a new employee. However, even if you have been here for a while, this Handbook should be a useful reference tool. It is meant to serve as a guide, highlighting and summarizing what you need to know and informing you where you can go for more detailed information. The general information provided in this Handbook serves only as a brief description of many of the Lab's policies. Policies, procedures and information are found in the Lab's Regulations and …
Date: September 5, 2008
Creator: Bello, Madelyn
System: The UNT Digital Library
TECHNICAL EQUIVALENCE BETWEEN PERKIN-ELMER DRCe AND ELAN 6000 FOR THE ANALYSIS OF 238U IN URINE BIOASSAY SAMPLES (open access)

TECHNICAL EQUIVALENCE BETWEEN PERKIN-ELMER DRCe AND ELAN 6000 FOR THE ANALYSIS OF 238U IN URINE BIOASSAY SAMPLES

The LLNL Bioassay Laboratory recently purchased a Perkin-Elmer DRCe ICP-MS (DRCe) to replace the existing Perkin-Elmer Elan 6000 ICP-MS (Elan 6000) used for the analysis of {sup 238}U in urine bioassay samples. In accordance with section 5.7.2 of DOE-STD-1112-98, 'The Department of Energy Laboratory Accreditation Program for Radiobioassay', this document demonstrates that the DRCe is technically equivalent to the Elan 6000. This paper documents: (1) Minor changes made in the procedure to improve the sensitivity; (2) Detection limits for the Elan 6000 and the DRCe; (3) Determination of the measurement uncertainty for the DRCe; and (4) Comparison of results from the DRCe versus the Elan 6000. A 1 mL aliquot of the sample is transferred to an auto sampler tube. Nitric acid and {sup 233}U (used as an internal standard) are added to the samples and the samples are digested in a microwave oven. The digested samples are diluted to 10 mL with deionized water and the {sup 238}U concentration is determined by ICP-MS. The ICP-MS is calibrated with a series of {sup 238}U standards. {sup 233}U is used as an internal standard to correct for suppression of the signal due to the sample matrix. The Elan 6000 is run …
Date: September 5, 2007
Creator: Wong, C T & Collins, L J
System: The UNT Digital Library
Historical Doses from Tritiated Water and Tritiated Hydrogen Gas Released to the Atmosphere from Lawrence Livermore National Laboratory (LLNL). Part 6. Summary (open access)

Historical Doses from Tritiated Water and Tritiated Hydrogen Gas Released to the Atmosphere from Lawrence Livermore National Laboratory (LLNL). Part 6. Summary

Throughout fifty-three years of operations, an estimated 792,000 Ci (29,300 TBq) of tritium have been released to the atmosphere at the Livermore site of Lawrence Livermore National Laboratory (LLNL); about 75% was tritium gas (HT) primarily from the accidental releases of 1965 and 1970. Routine emissions contributed slightly more than 100,000 Ci (3,700 TBq) HT and about 75,000 Ci (2,800 TBq) tritiated water vapor (HTO) to the total. A Tritium Dose Reconstruction was undertaken to estimate both the annual doses to the public for each year of LLNL operations and the doses from the few accidental releases. Some of the dose calculations were new, and the others could be compared with those calculated by LLNL. Annual doses (means and 95% confidence intervals) to the potentially most exposed member of the public were calculated for all years using the same model and the same assumptions. Predicted tritium concentrations in air were compared with observed mean annual concentrations at one location from 1973 onwards. Doses predicted from annual emissions were compared with those reported in the past by LLNL. The highest annual mean dose predicted from routine emissions was 34 {micro}Sv (3.4 mrem) in 1957; its upper confidence limit, based on very …
Date: September 5, 2007
Creator: Peterson, S
System: The UNT Digital Library