A letter report issued by the Government Accountability Office with an abstract that begins "Spent nuclear fuel--the used fuel periodically removed from reactors in nuclear power plants--is too inefficient to power a nuclear reaction, but is intensely radioactive and continues to generate heat for thousands of years. Potential health and safety implications make the control of spent nuclear fuel of great importance. The discovery, in 2004, that spent fuel rods were missing at the Vermont Yankee plant in Vermont generated public concern and questions about the Nuclear Regulatory Commission's (NRC) regulation and oversight of this material. GAO reviewed (1) plants' performance in controlling and accounting for their spent nuclear fuel, (2) the effectiveness of NRC's regulations and oversight of the plants' performance, and (3) NRC's actions to respond to plants' problems controlling their spent fuel."

Correspondence issued by the Government Accountability Office with an abstract that begins "Section 202 of the National Aeronautics and Space Administration (NASA) Authorization Act of 2000, Pub. L. No. 106-391, 202, 114 Stat. 1577, 1587 (Oct. 30, 2000) requires that GAO verify NASA's accounting for amounts obligated against established limits for the space station and related space shuttle support. Under the act, obligations are limited to $25 billion for the International Space Station's (ISS) development and $17.7 billion for shuttle launches in connection with the space station's assembly. In the past, we have advised Congressional committees that NASA was unable to provide detailed support for the amounts obligated against the limits. Thus, we could not verify the amounts that NASA reported in its budget requests to Congress."

A letter report issued by the Government Accountability Office with an abstract that begins "Federal agencies that administer means-tested programs are responsible for both ensuring that people have appropriate access to assistance and ensuring the integrity of the programs they oversee. To balance these two priorities appropriately, it is important for agencies to have information on program integrity and program access. Knowing the proportion of the population that qualifies for these programs relative to the numbers who actually participate can help ensure that agencies can monitor and communicate key information on program access. To better understand participation in low-income programs, this report provides information on: (1) the proportion of those eligible who are participating in 12 selected low-income programs; (2) factors that influence participation in those programs; and (3) strategies used by federal, state, and local administrators to improve both access and integrity, and whether agencies monitor access by measuring participation rates."

A letter report issued by the Government Accountability Office with an abstract that begins "CAFs have been discussed as a new mechanism for financing federal capital assets. As envisioned, CAFs would have two goals. First, CAFs would potentially improve decision making by reflecting the annual cost for the use of capital in program budgets. Second, they would help ameliorate at the subunit level the effect of large increases in budget authority for capital projects (i.e., spikes), without forfeiting congressional controls requiring the full cost of capital assets to be provided up-front. Through discussions with budget experts and by working with two case studies, the Departments of Agriculture and of the Interior, we are able to describe in this report (1) how CAFs would likely operate, (2) the potential benefits and difficulties of CAFs, including alternative mechanisms for obtaining the benefits, and (3) several issues to weigh when considering implementation of CAFs."

A letter report issued by the Government Accountability Office with an abstract that begins "With declining mail volumes, increasing compensation costs, and a more competitive marketplace, the need for the U.S. Postal Service (Service) to increase efficiency and reduce expenses is a matter of increasing importance and concern. According to the Service, one area where it can become more efficient is in its mail processing and distribution infrastructure. The objectives of this report are to (1) describe major business and demographic changes and their effect on the Service's mail processing and distribution infrastructure; (2) describe what actions the Service is taking in response to these changes, and what challenges exist; and (3) discuss the Service's strategy for realigning its infrastructure."

A letter report issued by the Government Accountability Office with an abstract that begins "GAO has identified spare parts supply as a long-standing Department of Defense (DOD) management problem. In December 2003, GAO reported on problems with Operation Iraqi Freedom (OIF) logistics support including shortages of spare parts and supplies in Iraq. This report expands on that effort by assessing (1) what supply shortages were experienced by U.S. forces in Iraq between October 2002 and September 2004 and what impact the shortages had on their operations, (2) what primary deficiencies in the supply system contributed to any identified supply shortages, and (3) what actions DOD has taken to improve the timely availability of supplies for current and future operations. To address these objectives, GAO judgmentally selected nine items based on lessons learned and after-action reports that represented possible shortages with operational impacts."

Correspondence issued by the Government Accountability Office with an abstract that begins "Provisions in the Senate's proposed postal reform legislation, the Postal Accountability and Enhancement Act, seek to address longstanding concerns about the Department of Transportation's (DOT) role in setting transportation rates for certain segments of the U.S. Postal Service's (USPS) international mail. Specifically, these rates are what air carriers charge USPS for transporting letter-class and military mail to international destinations. The methodology DOT uses to set these rates was established by the Civil Aeronautics Board (CAB) in a rate proceeding that concluded in the late 1970s. The transportation of this mail is subject to various statutory requirements, such as having DOT set the rates that USPS is to pay to U.S. air carriers for transporting international mail and a duty to carry provision that requires the air carriers to provide facilities and services for transporting this mail. DOT, USPS, and U.S. air carriers have raised concerns about the current rate process, particularly because the rate-setting methodology has not been comprehensively updated since the late 1970s. Some stakeholders view the current rate-setting process as an anachronism in today's increasingly deregulated international mail and transportation marketplace. USPS has stated that this …

The question of whether to permanently repeal the federal estate tax or to reform it remains a topic of congressional interest.This report presents a variety of data measuring the payment of estate and gift taxes to help inform the debate.

Interactions between surface and ground water are a key component of the hydrologic budget on the watershed scale. Models that honor these interactions are commonly based on the conductance concept that presumes a distinct interface at the land surface, separating the surface from the subsurface domain. These types of models link the subsurface and surface domains via an exchange flux that depends upon the magnitude and direction of the hydraulic gradient across the interface and a proportionality constant (a measure of the hydraulic connectivity). Because experimental evidence of such a distinct interface is often lacking in field systems, there is a need for a more general coupled modeling approach. A more general coupled model is presented that incorporates a new two-dimensional overland flow simulator into the parallel three-dimensional variable saturated subsurface flow code ParFlow. In ParFlow, the overland flow simulator takes the form of an upper boundary condition and is, thus, fully integrated without relying on the conductance concept. Another important advantage of this approach is the efficient parallelism incorporated into ParFlow, which is efficiently exploited by the overland flow simulator. Several verification and simulation examples are presented that focus on the two main processes of runoff production: excess infiltration …

The Off Gas Condensate Tank (OGCT) at the Defense Waste Processing Facility (DWPF) collects the condensate from the off-gas system of the melter. The condensate stream contains entrained solids that collect in the OGCT. Water from the OGCT is re-circulated to the Steam Atomized Scrubber and quencher and may provide a mechanism for re-introducing the particulates into the off-gas system. These particulates are thought to be responsible for plugging the downstream High Efficiency Mist Eliminator filters. Therefore, the OGCT needs to be periodically cleaned to remove the build-up of entrained solids. Currently, the OGCT is cleaned by adding nominally 12 wt% nitric acid with agitation to slurry the solids from the tank. Samples from the OGCT were sent to the Savannah River National Lab (SRNL) for characterization and to conduct tests to determine the optimum nitric acid concentration and residence time to allow more effective cleaning of the OGCT. This report summarizes the chemical and radionuclide results and the results from the nitric acid dissolution testing at 50% and 12% obtained for the OGCT sample.

Oceanic uptake and transport of bomb radiocarbon as {sup 14}CO{sub 2} created by atmospheric nuclear weapons testing in the 1950s and 1960s has been a useful diagnostic to determine the carbon transfer between the ocean and atmosphere. In addition, the distribution of radiocarbon in the ocean can be used as a tracer of oceanic circulation. Results obtained from samples collected in the Gulf of Alaska in the summer of 2002 provide a direct comparison with results in the 1970s during GEOSECS and in the early 1990s during WOCE. The open gyre values are 20-40{per_thousand} more negative than those documented in 1991 and 1993 (WOCE) although the general trends as a function of latitude are reproduced. Surface values are still significantly higher than pre-bomb levels ({approx}-105{per_thousand} or lower). In the central gyre, we observe {Delta}{sup 14}C-values that are lower in comparison to GEOSECS (stn 218) and WOCE P16/P17 to a density of {approx}26.8{sigma}t. This observation is consistent with the overall decrease in surface {Delta}{sup 14}C values, and reflects the erosion of the bomb-{sup 14}C transient. We propose that erosion of the bomb-{sup 14}C transient is accomplished by entrainment of low {sup 14}C water via vertical exchange within the Gulf of Alaska …

Matrix diffusion is an important mechanism for solute transport in fractured rock. We recently conducted a literature survey on the effective matrix diffusion coefficient, D{sub m}{sup e}, a key parameter for describing matrix diffusion processes at the field scale. Forty field tracer tests at 15 fractured geologic sites were surveyed and selected for the study, based on data availability and quality. Field-scale D{sub m}{sup e} values were calculated, either directly using data reported in the literature or by reanalyzing the corresponding field tracer tests. Surveyed data indicate that the effective-matrix-diffusion-coefficient factor F{sub D} (defined as the ratio of D{sub m}{sup e} to the lab-scale matrix diffusion coefficient [D{sub m}] of the same tracer) is generally larger than one, indicating that the effective matrix diffusion coefficient in the field is comparatively larger than the matrix diffusion coefficient at the rock-core scale. This larger value can be attributed to the many mass-transfer processes at different scales in naturally heterogeneous, fractured rock systems. Furthermore, we observed a moderate trend toward systematic increase in the F{sub D} value with observation scale, indicating that the effective matrix diffusion coefficient is likely to be statistically scale dependent. The F{sub D} value ranges from 1 to 10,000 …

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This report gives an overview of Dairy policy issues and the contents include Dairy forward pricing pilot program, Milk Income Loss Contract (MILC) payments, Milk protein concentrate trade issues, and dairy price support program

This report includes background information, information on recent developments, and proposals for progress on United Nations peacekeeping

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A near-infrared camera in use at the Canada-France-Hawaii Telescope (CFHT) and at the 1.6-m telescope of the Observatoire du Mont-Megantic is described. The camera is based on a Hawaii-1 1024 x 1024 HgCdTe array detector. Its main feature is to acquire three simultaneous images at three wavelengths across the methane absorption bandhead at 1.6 {micro}m, enabling, in theory, an accurate subtraction of the stellar point spread function (PSF) and the detection of faint close methanated companions. The instrument has no coronoagraph and features fast data acquisition, yielding high observing efficiency on bright stars. The performance of the instrument is described, and it is illustrated by laboratory tests and CFHT observations of the nearby stars GL526, {nu}-And and {chi}-And. TRIDENT can detect (6{sigma}) a methanated companion with {Delta}H = 9.5 at 0.5'' separation from the star in one hour of observing time. Non-common path aberrations and amplitude modulation differences between the three optical paths are likely to be the limiting factors preventing further PSF attenuation. Instrument rotation and reference star subtraction improve the detection limit by a factor of 2 and 4 respectively. A PSF noise attenuation model is presented to estimate the non-common path wavefront difference effect on PSF subtraction …

The Layzer model for the nonlinear evolution of bubbles in the Rayleigh-Taylor instability has recently been generalized to the case of spherically imploding interfaces [D. S. Clark and M. Tabak, to appear, PRE (2005).]. The spherical case is more relevant to, e.g., inertial confinement fusion or various astrophysical phenomena when the convergence is strong or the perturbation wavelength is comparable to the interface curvature. Here, the model is further extended to the case of bubble growth during the deceleration (stagnation) phase of a spherical implosion and to the growth of spikes during both the acceleration and deceleration phases. Differences in the nonlinear growth rates for both bubbles and spikes are found when compared with planar results. The model predictions are verified by comparison with numerical hydrodynamics simulations.

Bikini Island was contaminated March 1, 1954 by the Bravo detonation (U.S nuclear test series, Castle) at Bikini Atoll. About 90% of the estimated dose from nuclear fallout to potential island residents is from cesium-137 ({sup 137}Cs) transferred from soil to plants that are consumed by residents. Thus, radioecology research efforts have been focused on removing {sup 137}Cs from soil and/or reducing its uptake into vegetation. Most effective was addition of potassium (K) to soil that reduces {sup 137}Cs concentration in fruits to 3-5% of pretreatment concentrations. Initial observations indicated this low concentration continued for some time after K was last applied. Long-term studies were designed to evaluate this persistence in more detail because it is very important to provide assurance to returning populations that {sup 137}Cs concentrations in food (and, therefore, radiation dose) will remain low for extended periods, even if K is not applied annually or biennially. Potassium applied at 300, 660, 1260, and 1970 kg ha{sup -1} lead to a {sup 137}Cs concentration in drinking coconut meat that is 34, 22, 10, and about 4 % of original concentration, respectively. Concentration of {sup 137}Cs remains low 8 to 10 y after K is last applied. An explanation …

A large fraction of the expected number of source detections of the forthcoming observatory Gamma-ray Large Area Space Telescope (GLAST) will be initially unidentified. We argue that traditional methodological approaches to identify individual detections and/or populations of gamma-ray sources present procedural limitations. These limitations will hamper our ability to classify the populations lying in the anticipated dataset with the required degree of confidence, in particular for those for which no member has yet been detected convincingly with the predecessor experiment EGRET. Here we suggest a new paradigm for achieving the classification of gamma-ray source populations that is based on implementing an a priori protocol to search for theoretically-motivated candidates. It is essential that such paradigm will be defined before the data is unblinded, in order to protect the discovery potential of the sample. Key to the new procedure is a quantitative assessment of the confidence level by which new populations can be claimed to have been discovered. When needed, small number statistics is applied for population studies in gamma-ray astronomy. Although we refer here explicitly only to the case of GLAST, the scheme we present can certainly be adapted to other experiments confronted with a similar combination of problems.

Diesel fuel injector nozzles with spray hole diameters of 50-75 {micro}m have been fabricated via electroless nickel plating of conventionally made nozzles. Thick layers of nickel are deposited onto the orifice interior surfaces, reducing the diameter from {approx}200 {micro}m to the target diameter. The nickel plate is hard, smooth, and adherent, and covers the orifice interior surfaces uniformly.

A weekly publication, the Texas Register serves as the journal of state agency rulemaking for Texas. Information published in the Texas Register includes proposed, adopted, withdrawn and emergency rule actions, notices of state agency review of agency rules, governor's appointments, attorney general opinions, and miscellaneous documents such as requests for proposals. After adoption, these rulemaking actions are codified into the Texas Administrative Code.

Annual report of the Texas Racing Commission describing goals, activities, and accomplishments during fiscal year 2004

Presidential elections in Afghanistan were held on October 9, 2004, with heavy turnout and minimal violence. Karzai was declared the winner on November 3, 2004 with about 55% of the vote. Parliamentary, provincial, and district elections were to be held in April-May 2005, but parliamentary and provincial elections are now to be held September 18, 2005; district elections are put off until 2006. See CRS Report RL30588, Afghanistan: Post-War Governance, Security, and U.S. Policy.