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ASSESSMENT OF THE POTENTIAL FOR HYDROGEN GENERATION DURING GROUTING OPERATIONS IN THE R- AND P-REACTOR VESSELS
The R- and P-reactor buildings were retired from service and are now being prepared for deactivation and decommissioning (D&D). D&D activities will consist primarily of immobilizing contaminated components and structures in a grout-like formulation. Aluminum corrodes very rapidly when it comes in contact with the alkaline grout materials and as a result produces hydrogen gas. To address this potential deflagration/explosion hazard, the Materials Science and Technology Directorate (MS&T) of the Savannah River National Laboratory (SRNL) has been requested to review and evaluate existing experimental and analytical studies of this issue to determine if any process constraints on the chemistry of the fill material and the fill operation are necessary. Various options exist for the type of grout material that may be used for D&D of the reactor vessels. The grout formulation options include ceramicrete (pH 6-8), low pH portland cement + silica fume grout (pH 10.4), or Portland cement grout (pH 12.5). The assessment concluded that either ceramicrete or the silica fume grout may be used to safely grout the P-reactor vessel. The risk of accumulation of a flammable mixture of hydrogen between the grout-air interface and the top of the reactor is very low. Portland cement grout, on the …
Date:
December 29, 2009
Creator:
Wiersma, B.
Object Type:
Report
System:
The UNT Digital Library
Congressional Review Act: Rules Not Submitted to GAO and Congress
This report discusses the Congressional Review Act (CRA; 5 U.S.C. §801-808), which was enacted to improve congressional authority over agency rulemaking, and requires federal agencies to submit all of their final rules to both houses of Congress and the Government Accountability Office (GAO) before they can take effect.
Date:
December 29, 2009
Creator:
Copeland, Curtis W.
Object Type:
Report
System:
The UNT Digital Library
FIRST INTERIM STATUS REPORT: MODEL 9975 LIFE EXTENSION PACKAGE TESTING
Three 9975 packages have been instrumented and exposed to bounding storage conditions to help identify the extent to which laboratory test results for fiberboard, O-rings and other components apply within a full-scale package. To date, changes observed in the fiberboard overpack and Oring seals are generally consistent with the behavior of laboratory samples. The lead shield within each package has developed a corrosion layer of lead carbonate, consistent with other 9975 packages. However, the morphology of the corrosion layer is different within these packages, possibly as a result of the severity of the conditioning environments beyond normal service conditions. Conditioning of the second package, LE2, has been discontinued due to the degree of degradation of the fiberboard, and its components have received a final examination. Additional testing will be performed on samples removed from the fiberboard assembly to verify its final condition. The other two packages will continue in test. This is an interim status report for experiments carried out per Task Technical Plan WSRC-TR-2005-00014 [1], which is part of the comprehensive 9975 package surveillance program [2]. The primary goal of this task is to validate aging models currently under development based on lab scale testing of the fiberboard overpack …
Date:
December 29, 2009
Creator:
Daugherty, W. & Stefek, T.
Object Type:
Report
System:
The UNT Digital Library
Hydraulic Property and Soil Textural Classification Measurements for Rainier Mesa, Nevada Test Site, Nevada
This report presents particle size analysis, field-saturated hydraulic conductivity measurements, and qualitative descriptions of surficial materials at selected locations at Rainier Mesa, Nevada. Measurements and sample collection were conducted in the Rainier Mesa area, including unconsolidated sediments on top of the mesa, an ephemeral wash channel near the mesa edge, and dry U12n tunnel pond sediments below the mesa. Particle size analysis used a combination of sieving and optical diffraction techniques. Field-saturated hydraulic conductivity measurements employed a single-ring infiltrometer with analytical formulas that correct for falling head and spreading outside the ring domain. These measurements may prove useful to current and future efforts at Rainier Mesa aimed at understanding infiltration and its effect on water fluxes and radionuclide transport in the unsaturated zone.
Date:
December 29, 2009
Creator:
Ebel, Brian A. & Nimmo, John R.
Object Type:
Report
System:
The UNT Digital Library
INTERNATIONAL CONFERENCE ON INTELLIGENT SYSTEMS FOR MOLECULAR BIOLOGY (ISMB)
The Intelligent Systems for Molecular Biology (ISMB) conference has provided a general forum for disseminating the latest developments in bioinformatics on an annual basis for the past 13 years. ISMB is a multidisciplinary conference that brings together scientists from computer science, molecular biology, mathematics and statistics. The goal of the ISMB meeting is to bring together biologists and computational scientists in a focus on actual biological problems, i.e., not simply theoretical calculations. The combined focus on âintelligent systemsâ and actual biological data makes ISMB a unique and highly important meeting, and 13 years of experience in holding the conference has resulted in a consistently well organized, well attended, and highly respected annual conference. The ISMB 2005 meeting was held June 25-29, 2005 at the Renaissance Center in Detroit, Michigan. The meeting attracted over 1,730 attendees. The science presented was exceptional, and in the course of the five-day meeting, 56 scientific papers, 710 posters, 47 Oral Abstracts, 76 Software demonstrations, and 14 tutorials were presented. The attendees represented a broad spectrum of backgrounds with 7% from commercial companies, over 28% qualifying for student registration, and 41 countries were represented at the conference, emphasizing its important international aspect. The ISMB conference is …
Date:
December 29, 2009
Creator:
Goldberg, Debra; Hibbs, Matthew; Kall, Lukas; Komandurglayavilli, Ravikumar; Mahony, Shaun; Marinescu, Voichita et al.
Object Type:
Article
System:
The UNT Digital Library
Iran's Nuclear Program: Status
This report looks at the background of Iran's nuclear policy. It covers the current status of Iran's nuclear facilities, and current controversy surrounding them, as well as the effects of international sanctions on Iran, recent sabotages on the Iran Enrichment Program, an estimated timeline of Iran's nuclear weapon capabilities, and whether or not Iran even has a nuclear weapons program.
Date:
December 29, 2009
Creator:
Kerr, Paul K.
Object Type:
Report
System:
The UNT Digital Library
Iraq: Post-Saddam Governance and Security
None
Date:
December 29, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
PEP Run Report for Simulant Shakedown/Functional Testing
Pacific Northwest National Laboratory (PNNL) has been tasked by Bechtel National Inc. (BNI) on the River Protection Project-Waste Treatment Plant (RPP-WTP) project to perform research and development activities to resolve technical issues identified for the Pretreatment Facility (PTF). The Pretreatment Engineering Platform (PEP) was designed, constructed, and operated as part of a plan to respond to issue M12, "Undemonstrated Leaching Processes." The PEP is a 1/4.5-scale test platform designed to simulate the WTP pretreatment caustic leaching, oxidative leaching, ultrafiltration solids concentration, and slurry washing processes. The PEP replicates the WTP leaching processes using prototypic equipment and control strategies. The PEP also includes non-prototypic ancillary equipment to support the core processing. Two operating scenarios are currently being evaluated for the ultrafiltration process (UFP) and leaching operations. The first scenario has caustic leaching performed in the UFP-2 ultrafiltration feed vessels (i.e., vessel UFP-VSL-T02A in the PEP; and vessels UFP-VSL-00002A and B in the WTP PTF). The second scenario has caustic leaching conducted in the UFP-1 ultrafiltration feed preparation vessels (i.e., vessels UFP-VSL-T01A and B in the PEP; vessels UFP-VSL-00001A and B in the WTP PTF). In both scenarios, 19-M sodium hydroxide solution (NaOH, caustic) is added to the waste slurry in the …
Date:
December 29, 2009
Creator:
Josephson, Gary B.; Geeting, John GH; Bredt, Ofelia P.; Burns, Carolyn A.; Golovich, Elizabeth C.; Guzman-Leong, Consuelo E. et al.
Object Type:
Report
System:
The UNT Digital Library
Predicting detection probabilities for gas mixtures over HSI backgrounds
Detecting and identifying weak gaseous plumes using thermal image data acquired by airborne detectors is an area of ongoing research. This contribution investigates the relative detectability of gas mixtures over different backgrounds and a range of plume temperatures that are warmer and cooler than the ground. The focus of this analysis to support mission planning. When the mission is intended to collect evidence of particular chemicals, the analysis presented is this report can be used to determine conditions under which useful data can be acquired. Initial analyses can be used to determine whether LWIR is useful for the anticipated gas, temperature, and background combination.
Date:
December 29, 2009
Creator:
Tardiff, Mark F.; Walsh, Stephen J.; Anderson, Kevin K. & Chilton, Lawrence
Object Type:
Report
System:
The UNT Digital Library
Social Security, Saving, and the Economy
None
Date:
December 29, 2009
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Solving the Accelerator-Condenser Coupling Problem in a Nanosecond Dynamic Transmission Electron Microscope
We describe a modification to a transmission electron microscope (TEM) that allows it to briefly (using a pulsed-laser-driven photocathode) operate at currents in excess of 10 mA while keeping the effects of condenser lens aberrations to a minimum. This modification allows real-space imaging of material microstructure with a resolution of order 10 nm over regions several {micro}m across with an exposure time of 15 ns. This is more than 6 orders of magnitude faster than typical video-rate TEM imaging. The key is the addition of a weak magnetic lens to couple the large-diameter high-current beam exiting the accelerator into the acceptance aperture of a conventional TEM condenser lens system. We show that the performance of the system is essentially consistent with models derived from ray tracing and finite element simulations. The instrument can also be operated as a conventional TEM by using the electron gun in a thermionic mode. The modification enables very high electron current densities in {micro}m-sized areas and could also be used in a non-pulsed system for high-throughput imaging and analytical TEM.
Date:
December 29, 2009
Creator:
Reed, B W; LaGrange, T; Shuttlesworth, R M; Gibson, D J; Campbell, G H & Browning, N D
Object Type:
Article
System:
The UNT Digital Library
State, Foreign Operations, and Related Programs: FY2010 Budget and Appropriations
This report analyzes the FY2010 request, recent-year funding trends, and congressional action for FY2010, which includes the July 9 House approval of H.R. 3081, the State-Foreign Operations Appropriations bill for FY2010, July 9 Senate Appropriations Committee passage of its bill (S. 1434), and passage of H.R. 3288, the Consolidated Appropriations Act, 2010, signed into law Dec. 16, 2009 (P.L. 111-117).
Date:
December 29, 2009
Creator:
Epstein, Susan B.; Nakamura, Kennon H. & Lawson, Marian Leonardo
Object Type:
Report
System:
The UNT Digital Library
THERMAL PERFORMANCE ANALYSIS FOR SMALL ION-EXCHANGE CESIUM REMOVAL PROCESS
The In-Riser Ion Exchange program focuses on the development of in-tank systems to decontaminate high level waste (HLW) salt solutions at the Savannah River Site (SRS) and the Hanford Site. Small Column Ion Exchange (SCIX) treatment for cesium removal is a primary in-riser technology for decontamination prior to final waste immobilization in Saltstone. Through this process, radioactive cesium from the salt solution is adsorbed onto the ion exchange media which is packed within a flow-through column. Spherical Resorcinol-Formaldehyde (RF) is being considered as the ion exchange media for the application of this technology at both sites. A packed column loaded with media containing radioactive cesium generates significant heat from radiolytic decay. Under normal operating conditions, process fluid flow through the column can provide adequate heat removal from the columns. However, in the unexpected event of loss of fluid flow or fluid drainage from the column, the design must be adequate to handle the thermal load to avoid unacceptable temperature excursions. Otherwise, hot spots may develop locally which could degrade the performance of the ion-exchange media or the temperature could rise above column safety limits. Data exists which indicates that performance degradation with regard to cesium removal occurs with RF at …
Date:
December 29, 2009
Creator:
Lee, S. & King, W.
Object Type:
Article
System:
The UNT Digital Library
The Underground Test Area Project of the Nevada Test Site: Building Confidence in Groundwater Flow and Transport Models at Pahute Mesa Through Focused Characterization Studies
Pahute Mesa at the Nevada Test Site contains about 8.0E+07 curies of radioactivity caused by underground nuclear testing. The Underground Test Area Subproject has entered Phase II of data acquisition, analysis, and modeling to determine the risk to receptors from radioactivity in the groundwater, establish a groundwater monitoring network, and provide regulatory closure. Evaluation of radionuclide contamination at Pahute Mesa is particularly difficult due to the complex stratigraphy and structure caused by multiple calderas in the Southwestern Nevada Volcanic Field and overprinting of Basin and Range faulting. Included in overall Phase II goals is the need to reduce the uncertainty and improve confidence in modeling results. New characterization efforts are underway, and results from the first year of a three-year well drilling plan are presented.
Date:
December 29, 2009
Creator:
Pawloski, G A; Wurtz, J & Drellack, S L
Object Type:
Article
System:
The UNT Digital Library
The 2009 Influenza Pandemic: Selected Legal Issues
This report provides a brief overview of selected legal issues regarding the H1N1 influenza, including emergency measures, civil rights, liability issues, and employment issues.
Date:
October 29, 2009
Creator:
Swendiman, Kathleen S. & Jones, Nancy Lee
Object Type:
Report
System:
The UNT Digital Library
21st Century Locomotive Technology: Quarterly Technical Status Report 27 DOE/AL68284-TSR27
Fast thermal models of cell interior temperature have been developed and validation initiated. A subscale sodium battery has been received and instrumented for validation of thermal models
Date:
October 29, 2009
Creator:
Salasoo, Lembit & Chandra, Ramu S.
Object Type:
Report
System:
The UNT Digital Library
Access to Broadband Networks: The Net Neutrality Debate
This report discusses the current debate over "net neutrality." While there is no single accepted definition of "net neutrality," most agree that any such definition should include the general principles that owners of the networks that compose and provide access to the Internet should not control how consumers lawfully use that network, and they should not be able to discriminate against content provider access to that network.
Date:
October 29, 2009
Creator:
Gilroy, Angele A.
Object Type:
Report
System:
The UNT Digital Library
Amendments to the Foreign Intelligence Surveillance Act (FISA) Set to Expire February 28, 2010
The Foreign Intelligence Surveillance Act (FISA) provides a statutory framework by which government agencies may, when gathering foreign intelligence investigation, obtain authorization to conduct electronic surveillance or physical searches, utilize pen registers and trap and trace devices, or access specified business records and other tangible things. This report discusses three sunsetting amendments of FISA which include the "Lone Wolf" provision, "roving" wiretaps, and access to business records.
Date:
October 29, 2009
Creator:
Henning, Anna C. & Liu, Edward C.
Object Type:
Report
System:
The UNT Digital Library
ASSESSMENT OF THE POTENTIAL FOR HYDROGEN GENERATION DURING GROUTING OPERATIONS IN THE R AND P REACTOR VESSELS
The R- and P-reactor buildings were retired from service and are now being prepared for deactivation and decommissioning (D&D). D&D activities will consist primarily of immobilizing contaminated components and structures in a grout-like formulation. Aluminum corrodes very rapidly when it comes in contact with the alkaline grout materials and as a result produces hydrogen gas. To address this potential deflagration/explosion hazard, the Materials Science and Technology Directorate (MS&T) of the Savannah River National Laboratory (SRNL) has been requested to review and evaluate existing experimental and analytical studies of this issue to determine if any process constraints on the chemistry of the fill material and the fill operation are necessary. Various options exist for the type of grout material that may be used for D&D of the reactor vessels. The grout formulation options include ceramicrete (pH 6-8), low pH portland cement + silica fume grout (pH 10.4), or portland cement grout (pH 12.5). The assessment concluded that either ceramicrete or the silica fume grout may be used to safely grout the R- and P- reactor vessels. The risk of accumulation of a flammable mixture of hydrogen between the grout-air interface and the top of the reactor is very low. Conservative calculations …
Date:
October 29, 2009
Creator:
Wiersma, B.
Object Type:
Report
System:
The UNT Digital Library
Defense Acquisitions: Challenges in Aligning Space System Components
A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) expects to spend more than $50 billion to develop and procure eight major space systems. Typically, the systems have two main components: satellites and ground control systems. Some also have a third component--user terminals--that can allow access from remote locations. If the delivery of these three components is not synchronized, there can be delays in providing full capabilities to the warfighter, and satellites on orbit can remain underutilized for years. Given preliminary indication of uncoordinated deployment, GAO was asked to examine (1) the extent to which satellite, ground control, and user terminal deployments are aligned; (2) the reasons deployments have not always been well coordinated; (3) actions being taken to enhance coordination; and (4) whether enhancements to ground systems could optimize the government's investment. To accomplish this, GAO analyzed plans for all major DOD satellite acquisitions and interviewed key officials."
Date:
October 29, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Federal Student Aid: Highlights of a Study Group on Simplifying the Free Application for Federal Student Aid
A letter report issued by the Government Accountability Office with an abstract that begins "Federal student aid is intended to play an integral part in fulfilling the promise of greater academic access and success for less affluent students. However, many experts have expressed concern about the length and complexity of the Free Application for Federal Student Aid (FAFSA) and the statutory need analysis formula used to determine aid eligibility. The Higher Education Opportunity Act required GAO to form a study group to examine options and implications in simplifying the financial aid process. The study group focused on (1) identifying ways to shorten the FAFSA and make it less burdensome to complete, (2) identifying changes to the statutory need analysis formula that would reduce the amount of financial information required by the FAFSA without causing significant redistribution of federal and state student aid, and (3) determining how any changes to the FAFSA and the statutory need analysis formula could be implemented. To address these questions we convened an expert panel on May 7, 2009, and conducted additional interviews with experts. This summary captures the ideas and themes that emerged at the panel and during interviews. It does not necessarily represent the …
Date:
October 29, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Financial Management Systems: DHS Faces Challenges to Successfully Consolidate Its Existing Disparate Systems
Testimony issued by the Government Accountability Office with an abstract that begins "In June 2007, GAO reported that the Department of Homeland Security (DHS) had made little progress in integrating its existing financial management systems and made six recommendations focused on the need for DHS to define a departmentwide strategy and embrace disciplined processes. In June 2007, DHS announced its new financial management systems strategy, called the Transformation and Systems Consolidation (TASC) program. GAO's testimony provides preliminary analysis of the status of its prior recommendations and whether there were additional issues identified that pose challenges to the successful implementation of the TASC program. GAO reviewed relevant documentation, such as the January 2009 Request for Proposal and its attachments, and interviewed key officials to obtain additional information. GAO provided a draft report that this testimony is based on to DHS on September 29, 2009, for review and comment. After reviewing and considering DHS' comments, GAO plans to finalize and issue the report including providing appropriate recommendations aimed at improving the department's implementation of the TASC program."
Date:
October 29, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
Formerly Used Defense Sites: The U.S. Army Corps of Engineers Needs to Improve Its Process for Reviewing Completed Cleanup Remedies to Ensure Continued Protection
A letter report issued by the Government Accountability Office with an abstract that begins "The Department of Defense (DOD) estimates that cleaning up known hazards at the over 4,700 formerly used defense sites (FUDS)--sites transferred to other owners before October 1986--will require more than 50 years and cost about $18 billion. This estimate excludes any additional needed cleanup of emerging contaminants--generally, those not yet governed by a health standard. DOD delegated FUDS cleanup responsibility to the U.S. Army Corps of Engineers (Corps). In addition to FUDS, DOD is responsible for cleaning up about 21,500 sites on active bases and 5,400 sites on realigned or closed bases. The House Armed Services Committee directed GAO to examine (1) the extent to which the Corps reevaluates sites to identify emerging contaminants; (2) how DOD allocates cleanup funds; (3) how the Corps prioritizes FUDS for cleanup; and (4) FUDS program overhead costs. GAO analyzed nationwide FUDS property and project data; policies, guidance and budget documents; and interviewed DOD and Corps officials."
Date:
October 29, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Information Security: Concerted Effort Needed to Improve Federal Performance Measures
Testimony issued by the Government Accountability Office with an abstract that begins "Cyber security is a critical consideration for any organization that depends on information systems and computer networks to carry out its mission or business. Organizations are faced with a variety of information security threats, such as fraudulent activity from cyber criminals, unauthorized access by disgruntled or dishonest employees, and denial-of-service attacks and other disruptions. The recent dramatic increase in reports of security incidents, the wide availability of hacking tools, and steady advances in the sophistication and effectiveness of attack technology all contribute to the urgency of ensuring that adequate steps are taken to protect the federal government's information and the systems that contain and process it. The Federal Information Security Management Act (FISMA), which was enacted in 2002, sets forth a comprehensive framework for ensuring the effectiveness of security controls over information resources that support federal operations and assets. The act assigns specific responsibilities to federal agencies, the Office of Management and Budget (OMB), and the National Institute of Standards and Technology (NIST). It also requires agencies and OMB to annually report on the adequacy and effectiveness of agency information security programs and compliance with the provisions of …
Date:
October 29, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library