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Ultimate strength of carbon nanotubes: A theoretical study (open access)

Ultimate strength of carbon nanotubes: A theoretical study

Article on a theoretical study of the ultimate strength of carbon nanotubes.
Date: March 27, 2002
Creator: Zhao, Qingzhong; Buongiorno Nardelli, Marco & Bernholc, Jerry
Object Type: Article
System: The UNT Digital Library
Social Security Programs: Scope of SSA's Authority to Deny Benefits to Fugitive Felons and to Release Information About OASI and DI Beneficiaries Who Are Fugitive Felons (open access)

Social Security Programs: Scope of SSA's Authority to Deny Benefits to Fugitive Felons and to Release Information About OASI and DI Beneficiaries Who Are Fugitive Felons

Correspondence issued by the General Accounting Office with an abstract that begins "Fugitive felons are ineligible for Supplemental Security Income (SSI) benefits. The Social Security Administration (SSA) will, upon request, provide law enforcement agencies with the current addresses and Social Security numbers of fugitive felons who are SSI recipients. The Privacy Act of 1974 generally prohibits federal agencies from disclosing to anyone, including other government agencies, information they have on file on individuals. When the head of a law enforcement agency asks SSA for information on an individual as part of civil or criminal investigations, SSA has the authority under the Privacy Act to disclose this information but is not required to do so. The Social Security Act does not give SSA the authority to determine if individuals are ineligible for Old Age and Survivors Insurance and Disability Insurance benefits because they are fugitive felons."
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Mine Safety and Health Administration: Implementation of the Inflation Adjustment Act (open access)

Mine Safety and Health Administration: Implementation of the Inflation Adjustment Act

Correspondence issued by the General Accounting Office with an abstract that begins "The Federal Civil Penalties Inflation Adjustment Act of 1990 went under a governmentwide review by GAO earlier this year. The act required each federal agency to issue a regulation adjusting its covered maximum and minimum civil monetary penalties for inflation by October 23, 1996, and requires them to make necessary adjustments at least once every 4 years thereafter. GAO determined that the Mine Safety and Health Administration within the Department of Labor published its first round of penalty adjustments in April 1998, but has not published a second round of adjustments for at least two eligible penalties."
Date: November 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Defense Acquisition: DOD Faces Challenges in Implementing Best Practices (open access)

Defense Acquisition: DOD Faces Challenges in Implementing Best Practices

A statement of record issued by the General Accounting Office with an abstract that begins "GAO studied several leading companies in the private sector that have made dramatic changes to their process for acquiring services. GAO found that these changes generally began with a corporate decision to pursue a more strategic approach to acquiring services--from developing a better picture of what the company was actually spending on services to developing new ways of doing business. The Defense Department (DOD), the government's largest purchaser of services, already has some elements in place that are essential to such a strategic approach, such as a commitment by top management to adopting best practices. However, DOD has yet to conduct a comprehensive analysis of its spending on services or thoroughly assess it's current structure, processes, and roles. DOD's size, the range and complexity of the services that it acquires, the capacity of its information and financial systems, and the unique requirements of the federal government are among the factors that DOD will need to consider as it tailors a strategic approach to its diverse needs."
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Information on the Environmental Protection Agency's Actual and Proposed Funding for Enforcement Activities for Fiscal Years 2001 through 2003 (open access)

Information on the Environmental Protection Agency's Actual and Proposed Funding for Enforcement Activities for Fiscal Years 2001 through 2003

Correspondence issued by the General Accounting Office with an abstract that begins "GAO reviewed the Environmental Protection Agency's (EPA) proposal to reduce the number of full-time employees from its enforcement budget for compliance monitoring and civil enforcement activities to evaluate EPA's statements that (1) the jobs being eliminated are ones that EPA has allowed to lapse or has been unable to fill and (2) the reductions will be managed through normal attrition, without any loss of enforcement expertise and without shifting staff to nonenforcement functions. GAO found that EPA received a total of 1,464.8 full-time equivalent (FTE) positions for civil enforcement and compliance-monitoring functions under its Environmental Program and Management appropriation. EPA's fiscal year 2001 operating plan included full funding for the FTE positions provided for civil enforcement and compliance-monitoring activities. According to Office of Compliance and Enforcement (OECA) officials, the agency had no specific plans to leave vacancies open in anticipation of planned reductions in the workforce for compliance monitoring and civil enforcement. According to EPA officials, the agency does not assume or use any attrition rate in developing its annual budget. Instead, EPA establishes FTE ceilings for each of its program offices, which are expected to manage their …
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Medicare: Communications with Physicians Can Be Improved (open access)

Medicare: Communications with Physicians Can Be Improved

A letter report issued by the General Accounting Office with an abstract that begins "Unlike other federal programs that make expenditures under the direct control of the government, Medicare constitutes a promise to pay for covered medical services provided to its beneficiaries by about one million providers. Given this open-ended entitlement, it is essential that appropriate and effective rules and policies be specified so that only necessary services are provided and reimbursed. Congress and the Centers for Medicare and Medicaid Services (CMS) have promulgated an extensive body of statutes, regulations, policies, and procedures on what shall be paid for and under what circumstances. Information that carriers give to physicians is often difficult to use, out of date, inaccurate, and incomplete. Medicare bulletins that carriers use to communicate with physicians are often poorly organized and contain dense legal language. Similarly, other means of communicating with physicians, such as toll-free provider assistance lines and websites, have problems with accuracy and completeness. Although all carriers issue bulletins, operate call centers, and maintain websites, each carrier develops its own communications policies and strategies. This approach results in a duplication of effort as well as variations in the quality of carrier communications. CMS provides little …
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Financial Audit: IRS's Fiscal Years 2001 and 2000 Financial Statements (open access)

Financial Audit: IRS's Fiscal Years 2001 and 2000 Financial Statements

A letter report issued by the General Accounting Office with an abstract that begins "This report presents the results of GAO's audits of the financial statements of the Internal Revenue Service (IRS) for fiscal years 2001 and 2000. GAO was able to provide unqualified opinions on IRS's fiscal years 2001 and 2000 financial statements because IRS senior management and staff made extraordinary efforts to compensate for serious internal control and systems deficiencies. Despite these efforts, IRS found it extremely difficult to meet the February 27 reporting deadline set by the Office of Management and Budget (OMB). OMB intends to significantly accelerate this deadline in the future. Beginning with fiscal year 2004, IRS will be required to issue its financial statements by November 15--only 6 weeks after the end of the fiscal year. Moreover, the Department of Treasury has established a goal of completing its fiscal year 2002 audit, including those of its component entities, and issuing its department wide accountability report by November 15, 2002. To meet this goal and sustain an unqualified opinion on its financial statements, IRS will need to make systemic changes in how it processes transactions, maintains its financial records, and reports its financial results. At …
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
VA and Defense Health Care: Increased Risk of Medication Errors for Shared Patients (open access)

VA and Defense Health Care: Increased Risk of Medication Errors for Shared Patients

A letter report issued by the General Accounting Office with an abstract that begins "Medication errors and adverse drug reactions are a significant concern for the Department of Veterans Affairs (VA) and the Department of Defense (DOD) because their large beneficiary populations receive many prescriptions. Each agency has taken steps to reduce the risk of medication errors, such as making patients' medical records more accessible to providers and performing checks for drug interactions. Although each agency has designed safeguards to protect its own patients, some VA and DOD patients receive medication from both agencies. Shared patients face a higher risk of medication error. Joint (DOD and VA) venture sites with inpatient facilities provide services to shared inpatients in the same manner as they do for their own beneficiaries; that is, medications are ordered using the facility's guidelines and filled through the inpatient pharmacy at that facility. Gaps in safeguards result primarily from VA's and DOD's separate, uncoordinated information and formulary systems. Joint venture sites have tried to address some of these safety gaps. For instance, all sites have made patient information more accessible by providing additional, although incomplete, access to the other agency's patient information system."
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Child Labor: Labor Can Strengthen Its Efforts to Protect Children Who Work (open access)

Child Labor: Labor Can Strengthen Its Efforts to Protect Children Who Work

A letter report issued by the General Accounting Office with an abstract that begins "In 2001, almost 40 percent of all 16- and 17-year-olds in the United States and many 14- and 15-year-olds worked at some time in the year. Children in the United States are often encouraged to work, and many people believe that children benefit from early work experiences by developing independence, confidence, and responsibility. However, the public also wants to ensure that the work experiences of young people enhance, rather than harm, their future opportunities. The number and characteristics of working children have changed little over the past decade. According to Bureau of Labor Statistics data, as in 1990, as many as 3.7 million children aged 15 to 17 worked in 2001. The number of children who die each year from work-related injuries has changed little since 1992, but the number of children who incurred nonfatal injuries while working is more difficult to determine because data from different sources provide different estimates of the number of injuries and trends over time. The Department of Labor devotes many resources to ensuring compliance with the child labor provisions of the Fair Labor Standards Act, including conducting nationwide campaigns designed …
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Commercial Activities Panel: Improving the Sourcing Decisions of the Federal Government (open access)

Commercial Activities Panel: Improving the Sourcing Decisions of the Federal Government

Testimony issued by the General Accounting Office with an abstract that begins "The Commercial Activities Panel is a congressionally mandated panel to study and make recommendations for improving the policies and procedures governing the transfer of commercial activities from government to contractor personnel. The growing controversy surrounding competitions, under the Office of Management and Budget's Circular A-76 to determine whether the government should obtain commercially available goods and services from the public or private sectors, led to the establishment of this Panel. In establishing the Panel, several steps were taken to ensure representation from all major stakeholders as well as to ensure a fair and balanced process. To ensure a broad range of views on the Panel, a Federal Register notice was used to seek suggestions for the Panel's composition. As the Panel began its work, it recognized the need for a set of principles for sourcing decisions. These principles provide for an assessment of what does or does not work in the current A-76 process and provide a framework for identifying needed changes. Many of the Panel's recommendations can be accomplished administratively under existing law, and the Panel recommends that they be implemented as soon as practical. The Panel …
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
VA and Defense Health Care: Military Medical Surveillance Policies in Place, but Implementation Challenges Remain (open access)

VA and Defense Health Care: Military Medical Surveillance Policies in Place, but Implementation Challenges Remain

Testimony issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) and the Department of Veterans Affairs (VA) recently established a medical surveillance system to respond to the health care needs of both military personnel and veterans. A medical surveillance system involves the ongoing collection and analysis of uniform information on deployments, environmental health threats, disease monitoring, medical assessments, and medical encounters and its timely dissemination to military commanders, medical personnel, and others. GAO and others have reported extensively on weaknesses in DOD's medical surveillance capability and performance during the Gulf War and Operation Joint Endeavor. Investigations into the unexplained illnesses of Gulf War veterans revealed DOD's inability to collect, maintain, and transfer accurate data on the movement of troops, potential exposures to health risks, and medical incidents during deployment. DOD improved its medical surveillance system under Operation Joint Endeavor, which provided useful information to military commanders and medical personnel. However, several problems persist. DOD has several efforts under way to improve the reliability of deployment information and enhance its information technology capabilities. Although its recent policies and reorganization reflect a commitment to establish a comprehensive medical surveillance system, much needs to be done …
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Employee Privacy: Computer-Use Monitoring Practices and Policies of Selected Companies (open access)

Employee Privacy: Computer-Use Monitoring Practices and Policies of Selected Companies

A letter report issued by the General Accounting Office with an abstract that begins "Over the past decade, there has been a technological revolution in the workplace as businesses have increasingly turned to computer technology the primary tool to communicate, conduct research, and store information. Also during this time, concern has grown among private sector employers that their computer resources may be abused by employees--either by accessing offensive material or jeopardizing the security of proprietary information--and may provide an easy entry point into a company's electronic systems by computer trespassers. As a result, companies have developed "computer conduct" policies and implement strategies to monitor their employees' use of e-mail, the Internet, and computer files. Federal and state laws and judicial decisions have generally given private sector companies wide discretion in their monitoring and review of employee computer transmissions. However, some legal experts believe that these laws should be more protective of employee privacy by limiting what aspects of employee computer use employers may monitor and how they may do so. Following the September 11, 2001, terrorist attacks on the United States, policymakers re-examined many privacy issues as they debated the USA PATRIOT Act, which expands the federal government's authority to …
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Defense Budget: Contingency Operations in the Balkans May Need Less Funding in Fiscal Year 2003 (open access)

Defense Budget: Contingency Operations in the Balkans May Need Less Funding in Fiscal Year 2003

A letter report issued by the General Accounting Office with an abstract that begins "From the end of the Persian Gulf War in February 1991 through May 2002, the Department of Defense (DOD) reported over $43.9 billion in incremental costs for its overseas contingency operations. These operations include the enforcement of no-fly zones, humanitarian assistance, and peace enforcement operations, as well as combating terrorism beginning in fiscal year 2001. The majority of these costs were incurred in the Balkans and Southeast Asia. In fiscal year 2002, U.S. military forces are continuing to participate in a number of contingency operations, primarily in the Balkans, Southwest Asia, and a number of locations that involve combating terrorism. The military services received a combination of funding provided in the DOD appropriations act for fiscal year 2002 and money remaining in previously funded contingency fund accounts. The services also took steps to reduce costs in order to keep them in line with available funding. Both the North Atlantic Treaty Organization and DOD plan to reduce troop levels in the Balkans during fiscal year 2003, which may reduce funding needs during the year. In Europe, the Army anticipates an overall reduction of 1,160 troops during fiscal …
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
GAO Performance and Accountability Report, 2001 (open access)

GAO Performance and Accountability Report, 2001

Other written product issued by the General Accounting Office with an abstract that begins "GAO published its 2001 Performance and Accountability Report, which combines an assessment of its accomplishments in fiscal year 2001 with its plans for continued progress through fiscal year 2003. GAO noted that (1) its financial reporting is reliable, (2) GAO is in compliance with all applicable laws and regulations, and (3) its performance reporting is reliable."
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Tax Administration: New Compliance Research Effort Is on Track, but Important Work Remains (open access)

Tax Administration: New Compliance Research Effort Is on Track, but Important Work Remains

A letter report issued by the General Accounting Office with an abstract that begins "The U.S. tax system is based on taxpayers voluntarily complying with the tax laws. However, the Internal Revenue Service (IRS) last measured taxpayers' rate of compliance using 1988 tax returns. As time has passed, IRS has become concerned that its ability to understand the effectiveness of its programs and target audits on noncompliant returns has deteriorated, potentially resulting in poorer service to taxpayers, reduced confidence in the fairness of the tax system, and unnecessary audits of compliant taxpayers. IRS is now planning a new compliance study called the National Research Program (NRP). NRP is designed to review 49,000 individual tax returns randomly selected from the population of over 129 million. According to the NRP plan, IRS will review each sampled return to determine whether the taxpayer has complied with statutory income, expense, and tax reporting requirements. Unlike past compliance studies, not all of the reviews will include contacting taxpayers. Based on GAO's assessment of the NRP in light of government guidance on performance measurement and data reliability, research design guidelines, and IRS's goals for the program, NRP's design is likely to yield the sort of detailed …
Date: June 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Results-Oriented Cultures: Using Balanced Expectations to Manage Senior Executive Performance (open access)

Results-Oriented Cultures: Using Balanced Expectations to Manage Senior Executive Performance

A letter report issued by the General Accounting Office with an abstract that begins "Effective performance management systems link individual performance to organizational goals. In October 2000, the Office of Personnel Management amended regulations to require agencies to link senior executive performance with organizational goals; to appraise executive performance by balancing organizational results with customer satisfaction, employee perspective, and other areas; and to use performance results as a basis for pay, awards, and other personnel decisions. Agencies were to establish these performance management systems by their 2001 senior executive performance appraisal cycles. Because they implemented a set of balanced expectations prior to the Office of Personnel Management requirement, GAO studied the Bureau of Land Management's, Federal Highway Administration's, Internal Revenue Service's, and Veterans Benefits Administration's use of balanced expectations to manage senior executive performance in order to identify initial approaches that may be helpful to other agencies in holding senior executives accountable for results."
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Purchase Cards: Control Weaknesses Leave Army Vulnerable to Fraud, Waste, and Abuse (open access)

Purchase Cards: Control Weaknesses Leave Army Vulnerable to Fraud, Waste, and Abuse

A letter report issued by the General Accounting Office with an abstract that begins "The Army's purchase card program--the largest within the Defense Department--offers significant benefits, but weak internal controls have left the Army vulnerable to fraudulent, improper, and abusive purchases. The Army has yet to issue servicewide regulations or operating procedures, instead relying on ad hoc memoranda and other informal guidance. The Army also does a poor job of overseeing the purchase card program. The Army lacks the infrastructure--guidance and human capital--needed for effective program oversight. GAO identified several improper transactions involving clothing, food, and other items. GAO also identified improper purchases in which cardholders made a large number of purchases of similar items to circumvent the mandated limit of $2,500 for a single purchase."
Date: June 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Purchase Cards: Navy is Vulnerable to Fraud and Abuse but Is Taking Action to Resolve Control Weaknesses (open access)

Purchase Cards: Navy is Vulnerable to Fraud and Abuse but Is Taking Action to Resolve Control Weaknesses

A letter report issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) is promoting departmentwide use of purchase cards for obtaining goods and services. It reported that for the year ended September 30, 2001, purchase cards were used by 230,000 cardholders to make 10.7 million transactions valued at more than $6.1 billion. The benefits of using purchase cards versus traditional contracting and payment processes are lower transaction processing costs and less red tape for both the government and the vendor community. Although GAO supports the purchase card program concept, it is important that agencies have adequate internal controls in place to protect the government from fraud, waste, and abuse. A weak overall control environment and breakdowns in key internal controls leave the Navy vulnerable to potentially fraudulent, improper, and abusive purchases. In response to GAO's previous findings, DOD and Navy have begun improving the control environment over the purchase card program. However, further improvements are needed to achieve an effective control environment. GAO determined that the Navy did not provide cardholders, approving officials, and agency program coordinators with sufficient human capital resources--time and training--to effectively perform oversight and manage the program. The weaknesses …
Date: September 27, 2002
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Private Pensions: Key Issues to Consider Following the Enron Collapse (open access)

Private Pensions: Key Issues to Consider Following the Enron Collapse

Testimony issued by the General Accounting Office with an abstract that begins "The collapse of the Enron Corporation and the resulting loss of employee retirement savings highlighted several key vulnerabilities in the nation's private pension system. Asset diversification was a crucial lesson, especially for defined contribution plans, in which employees bear the investment risk. The Enron case underscores the importance of encouraging employees to diversify. Workers need clear and understandable information about their pension plans to make sound decisions on retirement savings. Although disclosure rules require plan sponsors to provide participants with a summary of their plan benefits and rights and to notify them when benefits are changed, this information is not always clear, particularly in the case of complex plans like floor-offset arrangements. Employees, like other investors, also need reliable and understandable information on a company's financial condition and prospects. Fiduciary standards form the cornerstone of private pension protections. These standards require plan sponsors to act solely in the interest of plan participants and beneficiaries. The Enron investigations should determine whether plan fiduciaries acted in accordance with their responsibilities."
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Budget Issues: Long-Term Fiscal Challenges (open access)

Budget Issues: Long-Term Fiscal Challenges

Testimony issued by the General Accounting Office with an abstract that begins "Combating terrorism and ensuring homeland security have created urgent claims on the nation's attention and on the federal budget. Although an economic recovery seems to be underway, the recession that began last spring has had real consequences for the budget. At the same time, the fiscal pressures created by the retirement of the baby boomers and rising health care costs continue unchanged. However, the surpluses also put the nation in a stronger position to respond to the events of September 11 and to the economic slowdown. The nation's commitment to surpluses will be tested. A return to surplus will require sustained discipline and difficult choices. Because the longer-term outlook is driven in large part by known demographic trends, the outlook 20 years from now is surer than the forecast for the next few years. The message of GAO's updated simulations remains the same as last year: absent structural changes in entitlement programs for the elderly, persistent deficits and escalating debt will overwhelm the budget in the long term. Both longer-term and new commitments undertaken after September 11 sharpen the need for competing claims and new priorities. A fundamental …
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Terrorism Insurance: Rising Uninsured Exposure to Attacks Heightens Potential Economic Vulnerabilities (open access)

Terrorism Insurance: Rising Uninsured Exposure to Attacks Heightens Potential Economic Vulnerabilities

Testimony issued by the General Accounting Office with an abstract that begins "In the closing months of last year, insurers claimed that they could not afford to continue providing coverage for potential terrorism losses. Considerable debate has taken place on what the federal government can do to keep commercial insurance companies involved in providing terrorism insurance, even without the protection that they normally receive from reinsurance. Insurance companies are withdrawing from the market because they believe that neither the frequency nor the magnitude of future terrorist losses can be estimated. Insurance coverage for terroris is disappearing, particularly for large businesses and those perceived to be at some risk. This withdrawal is happening fastest among reinsurers. Because the insurers' withdrawal has been gradual, the extent of the potential economic consequences is still unclear. What is clear is that without terrorism insurance, terrorist attacks would dramatically increase direct losses to businesses, employees, and lenders. Furthermore, the government's ability to intervene after a future terrorist attack may be hampered by its lack of claims-processing and payments systems. Even without actual terrorist attacks, some properties and businesses have been unable to find terrorism coverage at any price. These problems are likely to increase as …
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
U.S. Ethanol Market: MTBE Ban in California (open access)

U.S. Ethanol Market: MTBE Ban in California

Correspondence issued by the General Accounting Office with an abstract that begins "The 1990 amendments to the Clean Air Act require that an additive be added to gasoline in areas with excessive carbon monoxide or ozone pollution. Specifically, those areas with "severe" ozone pollution are required to use reformulated gasoline, which contains at least two percent oxygen by weight. In California, as in other areas of the country, oil refining companies primarily use the oxygenate methyl tertiary butyl ether (MTBE) to meet that requirement. Because MTBE has been detected in ground water, the governor of California has banned MTBE in the state's gasoline by the end of 2002. If California decides to use ethanol to replace MTBE, ethanol production capacity from 2003 through 2005 could likely satisfy U.S. consumption. However, if other states also banned MRBE and moved to ethanol, consumption could increase and affect the industry's ability to meet demand. Moreover, production capacity projections may be overstated because they include not only existing plants and plants under construction, but also new plants being planned, which may not materialize. Although prices have been relatively stable so far, ethanol price spikes could occur in California if supplies were disrupted by either …
Date: February 27, 2002
Creator: United States. General Accounting Office.
Object Type: Text
System: The UNT Digital Library
Uranium and Aluminosilicate Surface Precipitation Tests (open access)

Uranium and Aluminosilicate Surface Precipitation Tests

The 2H evaporator at the Savannah River Site has been used to treat an aluminum-rich waste stream from canyon operations and a silicon-rich waste stream from the Defense Waste Processing Facility. The formation of aluminosilicate scale in the evaporator has caused significant operational problems. Because uranium has been found to accumulate in the aluminosilicate solids, the scale deposition has introduced criticality concerns as well. The objective of the tests described in this report is to determine possible causes of the uranium incorporation in the evaporator scale materials. The scope of this task is to perform laboratory experiments with simulant solutions to determine if (1) uranium can be deposited on the surfaces of various sodium aluminosilicate (NAS) forms and (2) aluminosilicates can form on the surfaces of uranium-containing solids. Batch experiments with simulant solutions of three types were conducted: (1) contact of uranium solutions/sols with NAS coatings on stainless steel surfaces, (2) contact of uranium solutions with NAS particles, and (3) contact of precipitated uranium-containing particles with solutions containing aluminum and silicon. The results show that uranium can be incorporated in NAS solids through encapsulation in bulk agglomerated NAS particles of different phases (amorphous, zeolite A, sodalite, and cancrinite) as well …
Date: November 27, 2002
Creator: Hu, M.Z.
Object Type: Report
System: The UNT Digital Library
Electric Power Interruption Cost Estimates for Individual Industries, Sectors, and U.S. Economy (open access)

Electric Power Interruption Cost Estimates for Individual Industries, Sectors, and U.S. Economy

During the last 20 years, utilities and researchers have begun to understand the value in the collection and analysis of interruption cost data. The continued investigation of the monetary impact of power outages will facilitate the advancement of the analytical methods used to measure the costs and benefits from the perspective of the energy consumer. More in-depth analysis may be warranted because of the privatization and deregulation of power utilities, price instability in certain regions of the U.S. and the continued evolution of alternative auxiliary power systems.
Date: February 27, 2002
Creator: Balducci, Patrick J.; Roop, Joseph M.; Schienbein, Lawrence A.; DeSteese, John G. & Weimar, Mark R.
Object Type: Report
System: The UNT Digital Library