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2011 Annual Health Physics Report for the HEU transparency Program
During the 2008 calendar year, Lawrence Livermore National Laboratory (LLNL) provided health physics support for the Highly Enriched Uranium (HEU) Transparency Program for external and internal radiation protection. They also provided technical expertise related to BDMS radioactive sources and Russian radiation safety regulatory compliance. For the calendar year 2008, there were 158 person-trips that required dose monitoring of the U.S. monitors. Of the 158 person-trips, 148 person-trips were SMVs and 10 person-trips were Transparency Monitoring Office (TMO) trips. There were 6 monitoring visits by TMO monitors to facilities other than UEIE and 8 to UEIE itself. There were three monitoring visits (source changes) that were back-to-back with a total of 24 monitors. LLNL's Hazard Control Department laboratories provided the dosimetry services for the HEU Transparency monitors. In 2008, the HEU Transparency activities in Russia were conducted in a radiologically safe manner for the HEU Transparency monitors in accordance with the expectations of the HEU Transparency staff, NNSA and DOE. The HEU Transparency now has thirteen years of successful experience in developing and providing health and safety support in meeting its technical objectives.
Date:
April 30, 2012
Creator:
Radev, R.
Object Type:
Report
System:
The UNT Digital Library
Actual and potential users of the BnF web archives: Experiences and expectations
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the experiences of actual users of the Bibliothèque nationale de France web archives as well as the needs of potential users, and what BnF can do to improve access in the future.
Date:
April 30, 2012
Creator:
Oury, Clément & Stirling, Peter
Object Type:
Presentation
System:
The UNT Digital Library
Advanced High-Temperature Reactor Dynamic System Model Development: April 2012 Status
The Advanced High-Temperature Reactor (AHTR) is a large-output fluoride-salt-cooled high-temperature reactor (FHR). An early-phase preconceptual design of a 1500 MW(e) power plant was developed in 2011 [Refs. 1 and 2]. An updated version of this plant is shown as Fig. 1. FHRs feature low-pressure liquid fluoride salt cooling, coated-particle fuel, a high-temperature power cycle, and fully passive decay heat rejection. The AHTR is designed to be a “walk away” reactor that requires no action to prevent large off-site releases following even severe reactor accidents. This report describes the development of dynamic system models used to further the AHTR design toward that goal. These models predict system response during warmup, startup, normal operation, and limited off-normal operating conditions. Severe accidents that include a loss-of-fluid inventory are not currently modeled. The scope of the models is limited to the plant power system, including the reactor, the primary and intermediate heat transport systems, the power conversion system, and safety-related or auxiliary heat removal systems. The primary coolant system, the intermediate heat transport system and the reactor building structure surrounding them are shown in Fig. 2. These systems are modeled in the most detail because the passive interaction of the primary system with the …
Date:
April 30, 2012
Creator:
Qualls, A.L.; Cetiner, M.S. & Wilson, T.L., Jr.
Object Type:
Report
System:
The UNT Digital Library
Advanced Production Surface Preparation Technology Development for Ultra-High Pressure Diesel Injection
In 2007, An Ultra High Injection Pressure (UHIP) fueling method has been demonstrated by Caterpillar Fuel Systems - Product Development, demonstrating ability to deliver U.S. Environment Protection Agency (EPA) Tier 4 Final diesel engine emission performance with greatly reduced emissions handling components on the engine, such as without NOx reduction after-treatment and with only a through-flow 50% effective diesel particulate trap (DPT). They have shown this capability using multiple multi-cylinder engine tests of an Ultra High Pressure Common Rail (UHPCR) fuel system with higher than traditional levels of CEGR and an advanced injector nozzle design. The system delivered better atomization of the fuel, for more complete burn, to greatly reduce diesel particulates, while CEGR or high efficiency NOx reduction after-treatment handles the NOx. With the reduced back pressure of a traditional DPT, and with the more complete fuel burn, the system reduced levels of fuel consumption by 2.4% for similar delivery of torque and horsepower over the best Tier 4 Interim levels of fuel consumption in the diesel power industry. The challenge is to manufacture the components in high-volume production that can withstand the required higher pressure injection. Production processes must be developed to increase the toughness of the injector …
Date:
April 30, 2012
Creator:
Grant, Marion B.
Object Type:
Report
System:
The UNT Digital Library
An arbuscular mycorrhizal fungus modifies the soil microbial community and nitrogen cycling during litter decomposition
None
Date:
April 30, 2012
Creator:
Nuccio, E E; Hodge, A; Pett-Ridge, J; Herman, D J; Weber, P & Firestone, M K
Object Type:
Article
System:
The UNT Digital Library
Building Diagnostic Market Deployment - Final Report
Operational faults are pervasive across the commercial buildings sector, wasting energy and increasing energy costs by up to about 30% (Mills 2009, Liu et al. 2003, Claridge et al. 2000, Katipamula and Brambley 2008, and Brambley and Katipamula 2009). Automated fault detection and diagnostic (AFDD) tools provide capabilities essential for detecting and correcting these problems and eliminating the associated energy waste and costs. The U.S. Department of Energy's (DOE) Building Technology Program (BTP) has previously invested in developing and testing of such diagnostic tools for whole-building (and major system) energy use, air handlers, chillers, cooling towers, chilled-water distribution systems, and boilers. These diagnostic processes can be used to make the commercial buildings more energy efficient. The work described in this report was done as part of a Cooperative Research and Development Agreement (CRADA) between the U.S. Department of Energy's Pacific Northwest National Laboratory (PNNL) and KGS Building LLC (KGS). PNNL and KGS both believe that the widespread adoption of AFDD tools will result in significant reduction to energy and peak energy consumption. The report provides an introduction and summary of the various tasks performed under the CRADA. The CRADA project had three major focus areas: (1) Technical Assistance for Whole …
Date:
April 30, 2012
Creator:
Katipamula, S. & Gayeski, N.
Object Type:
Report
System:
The UNT Digital Library
Carbon Capture and Sequestration: A Regulatory Gap Assessment
Though a potentially significant climate change mitigation strategy, carbon capture and sequestration (CCS) remains mired in demonstration and development rather than proceeding to full-scale commercialization. Prior studies have suggested numerous reasons for this stagnation. This Report seeks to empirically assess those claims. Using an anonymous opinion survey completed by over 200 individuals involved in CCS, it concludes that there are four primary barriers to CCS commercialization: (1) cost, (2) lack of a carbon price, (3) liability risks, and (4) lack of a comprehensive regulatory regime. These results largely confirm previous work. They also, however, expose a key barrier that prior studies have overlooked: the need for comprehensive, rather than piecemeal, CCS regulation. The survey data clearly show that the CCS community sees this as one of the most needed incentives for CCS deployment. The community also has a relatively clear idea of what that regulation should entail: a cooperative federalism approach that directly addresses liability concerns and that generally does not upset traditional lines of federal-state authority.
Date:
April 30, 2012
Creator:
Davies, Lincoln; Uchitel, Kirsten; Ruple, John & Tanana, Heather
Object Type:
Report
System:
The UNT Digital Library
Carbon Capture and Sequestration: A Regulatory Gap Assessment
Though a potentially significant climate change mitigation strategy, carbon capture and sequestration (CCS) remains mired in demonstration and development rather than proceeding to full-scale commercialization. Prior studies have suggested numerous reasons for this stagnation. This Report seeks to empirically assess those claims. Using an anonymous opinion survey completed by over 200 individuals involved in CCS, it concludes that there are four primary barriers to CCS commercialization: (1) cost, (2) lack of a carbon price, (3) liability risks, and (4) lack of a comprehensive regulatory regime. These results largely confirm previous work. They also, however, expose a key barrier that prior studies have overlooked: the need for comprehensive, rather than piecemeal, CCS regulation. The survey data clearly show that the CCS community sees this as one of the most needed incentives for CCS deployment. The community also has a relatively clear idea of what that regulation should entail: a cooperative federalism approach that directly addresses liability concerns and that generally does not upset traditional lines of federal-state authority.
Date:
April 30, 2012
Creator:
Davies, Lincoln; Uchitel, Kirsten; Ruple, John & Tanana, Heather
Object Type:
Report
System:
The UNT Digital Library
Ceramic HEPA Filter Program
Potential benefits of ceramic filters in nuclear facilities: (1) Short term benefit for DOE, NRC, and industry - (a) CalPoly HTTU provides unique testing capability to answer questions for DOE - High temperature testing of materials, components, filter, (b) Several DNFSB correspondences and presentations by DNFSB members have highlighted the need for HEPA filter R and D - DNFSB Recommendation 2009-2 highlighted a nuclear facility response to an evaluation basis earthquake followed by a fire (aka shake-n-bake) and CalPoly has capability for a shake-n-bake test; (2) Intermediate term benefit for DOE and industry - (a) Filtration for specialty applications, e.g., explosive applications at Nevada, (b) Spin-off technologies applicable to other commercial industries; and (3) Long term benefit for DOE, NRC, and industry - (a) Across industry, strong desire for better performance filter, (b) Engineering solution to safety problem will improve facility safety and decrease dependence on associated support systems, (c) Large potential life-cycle cost savings, and (d) Facilitates development and deployment of LLNL process innovations to allow continuous ventilation system operation during a fire.
Date:
April 30, 2012
Creator:
Mitchell, M A; Bergman, W; Haslam, J; Brown, E P; Sawyer, S; Beaulieu, R et al.
Object Type:
Article
System:
The UNT Digital Library
The Challenges of Researching the Social Web
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses barriers to archiving and researching social media records and the capabilities needed to theoretically do so, and talks about the Texifter tool.
Date:
April 30, 2012
Creator:
Shulman, Stuart W.
Object Type:
Presentation
System:
The UNT Digital Library
China's Rare Earth Industry and Export Regime: Economic and Trade Implications for the United States
Over the past few years, the Chinese government has implemented a number of policies to tighten its control over the production and export of "rare earths"-a unique group of 17 metal elements on the periodic table that exhibit a range of special properties, such as magnetism, luminescence, and strength. Rare earths are important to a number of high technology industries, including renewable energy and various defense systems. This report examines the economic and trade implications of China's rare earth policies for the United States.
Date:
April 30, 2012
Creator:
Morrison, Wayne M. & Tang, Rachel
Object Type:
Report
System:
The UNT Digital Library
Closure Report for Corrective Action Unit 574: Neptune, Nevada National Security Site, Nevada
Corrective Action Unit (CAU) 574 is identified in the Federal Facility Agreement and Consent Order (FFACO) as 'Neptune' and consists of the following two Corrective Action Sites (CASs), located in Area 12 of the Nevada National Security Site: (1) CAS 12-23-10, U12c.03 Crater (Neptune); and (2) CAS 12-45-01, U12e.05 Crater (Blanca). This Closure Report presents information supporting closure of CAU 574 according to the FFACO (FFACO, 1996 [as amended March 2010]) and the Streamlined Approach for Environmental Restoration Plan for CAU 574 (U.S. Department of Energy, National Nuclear Security Administration Nevada Site Office [NNSA/NSO], 2011). The following activities were performed to support closure of CAU 574: (1) In situ external dose rate measurements were collected using thermoluminescent dosimeters at CAS 12-45-01, U12e.05 Crater (Blanca). (2) Total effective dose rates were determined at both sites by summing the internal and external dose rate components. (3) A use restriction (UR) was implemented at CAS 12-23-10, U12c.03 Crater (Neptune). Areas that exceed the final action level (FAL) of 25 millirems per year (mrem/yr) based on the Occasional Use Area exposure scenario are within the existing use restricted area for CAU 551. The 25-mrem/yr FAL is not exceeded outside the existing CAU 551 UR …
Date:
April 30, 2012
Creator:
National Security Technologies, LLC
Object Type:
Report
System:
The UNT Digital Library
A decade and a half of archiving the web for data mining: Lessons learned and how users use web archives
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the use of web archives for the last decade and a half, with a focus on a case study discussing the challenges of archiving newspaper websites, as well as how web archives are used verses how archive creators view them.
Date:
April 30, 2012
Creator:
Leetaru, Kalev H.
Object Type:
Presentation
System:
The UNT Digital Library
Development and Evaluation of a Novel Integrated Vacuum Carbonate Absorption Process
This project was aimed at obtaining process engineering and scale-up data at a laboratory scale to investigate the technical and economic feasibility of a patented post-combustion carbon dioxide (CO{sub 2}) capture process?the Integrated Vacuum Carbonate Absorption Process (IVCAP). Unique features of the IVCAP include its ability to be fully-integrated with the power plant?s steam cycle and potential for combined sulfur dioxide (SO{sub 2}) removal and CO{sub 2} capture. Theoretical and experimental studies of this project were aimed at answering three major technical questions: 1) What additives can effectively reduce the water vapor saturation pressure and energy requirement for water vaporization in the vacuum stripper of the IVCAP? 2) What catalysts can promote CO{sub 2} absorption into the potassium carbonate (PC) solution to achieve an overall absorption rate comparable to monoethanolamine (MEA) and are the catalysts stable at the IVCAP conditions and in the flue gas environment? 3) Are any process modifications needed to combine SO{sub 2} and CO{sub 2} removal in the IVCAP? Lab-scale experiments and thermodynamic and process simulation studies performed to obtain detailed information pertinent to the above three technical questions produced the following results: 1) Two additives were identified that lower the saturation pressure of water vapor …
Date:
April 30, 2012
Creator:
Lu, Yongqi; Rostam-Abadi, Massoud; Ye, Xinhuai; Zhang, Shihan; Ruhter, David; Khodayari, Arezoo et al.
Object Type:
Report
System:
The UNT Digital Library
Development of CFD-Based Simulation Tools for In-Situ Thermal Processing of Oil Shale/Sands
In our research, we are taking the novel approach of developing and applying high performance computing, computational fluid dynamics (CFD)-based simulation tools to a modified in-situ process for production of oil from oil shale. The simulation tools being developed capture the relevant physical processes and data from a large-scale system. The modified in-situ application is a pilot-scale heat transfer process inside Red Leaf Resourcesâ EcoShale capsule. We demonstrate the need to understand fluid flow behavior in the convective channels of the rubblized shale bed as convective heating greatly decreases the time required to heat the oil shale to the production temperature when compared with conductive heating alone. We have developed and implemented a geometry creation strategy for a representative section of the EcoShale capsule, developed a meshing approach to deal with the complicated geometry and produce a well-behaved mesh, analyzed the effects of boundary conditions on the simulation results, and devised a new operator splitting solution algorithm that reduces computational costs by taking advantage of the differing convective and conductive time scales occurring in the simulation. These simulation tools can be applied to a wide range of processes involving convective fluid flow heating in rubblized beds.
Date:
April 30, 2012
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
DIXI (Dilation x-ray imager) a new/faster gated x-ray imager for the NIF
None
Date:
April 30, 2012
Creator:
Nagel, S. R.; Hilsabeck, T. J.; Bell, P. M.; Bradley, D. K.; Ayers, M. J.; Barrios, M. A. et al.
Object Type:
Article
System:
The UNT Digital Library
Driving Down HB-LED Costs: Implementation of Process Simulation Tools and Temperature Control Methods of High Yield MOCVD Growth
The overall objective of this multi-faceted program is to develop epitaxial growth systems that meet a goal of 75% (4X) cost reduction in the epitaxy phase of HB-LED manufacture. A 75% reduction in yielded epitaxy cost is necessary in order to achieve the cost goals for widespread penetration of HB-LEDâs into back-lighting units (BLU) for LCD panels and ultimately for solid-state lighting (SSL). To do this, the program will address significant improvements in overall equipment Cost of Ownership, or CoO. CoO is a model that includes all costs associated with the epitaxy portion of production. These aspects include cost of yield, capital cost, operational costs, and maintenance costs. We divide the program into three phases where later phases will incorporate the gains of prior phases. Phase one activities are enabling technologies. In collaboration with Sandia National Laboratories we develop a Fluent-compatible chemistry predictive model and a set of mid-infrared and near-ultraviolet pyrometer monitoring tools. Where previously the modeling of the reactor dynamics were studied within FLUENT alone, here, FLUENT and Chemkin are integrated into a comprehensive model of fluid dynamics and the most advanced transport equations developed for Chemkin. Specifically, the Chemkin model offered the key reaction terms for gas-phase …
Date:
April 30, 2012
Creator:
Quinn, William
Object Type:
Report
System:
The UNT Digital Library
Efficient and Scalable Retrieval Techniques for Global File Properties
None
Date:
April 30, 2012
Creator:
Ahn, D H; Brim, M; de Supinski, B R; Gamblin, T; Lee, G L; LeGendre, M P et al.
Object Type:
Article
System:
The UNT Digital Library
Electronic Health Records: First Year of CMS's Incentive Programs Shows Opportunities to Improve Processes to Verify Providers Met Requirements
A letter report issued by the Government Accountability Office with an abstract that begins "The Centers for Medicare and Medicaid Services (CMS), an agency within the Department of Health and Human Services (HHS), and the four states GAO reviewed are implementing processes to verify whether providers met the Medicare and Medicaid EHR programs requirements and, therefore, qualified to receive incentive payments in the first year of the EHR programs. To receive such payments, providers must meet both (1) eligibility requirements that specify the types of providers eligible to participate in the programs and (2) reporting requirements that specify the information providers must report to CMS or the states, including measures that demonstrate meaningful use of an EHR system and measures of clinical quality. For the Medicare EHR program, CMS has implemented prepayment processes to verify whether providers have met all of the eligibility requirements and one of the reporting requirements. Beginning in 2012, the agency also has plans to implement a risk-based audit strategy to verify on a postpayment basis that a sample of providers met the remaining reporting requirements. For the Medicaid EHR Program, the four states GAO reviewed have implemented primarily prepayment processes to verify whether providers met …
Date:
April 30, 2012
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Final Report for Department of Energy/EERE (for public release)
Developing CIGS solar cells calls for the understanding of materials and processing in order to translate the record small efficiency to module and the strategy to produce thin cells for materials and processing saving. This project has exploited nanostructuring of CIG solar cells, including nanowires and nanotextured substrates. We showed that nanowires function as well-defined CIGS-CdS p-n junction for understanding the chemical fluctuation, defect formation interface and grain boundary behaviors and the effect of ion diffusion, which are important but complicated issues for solar cell fabrication. We have also demonstrated effective nanoscale photon management on nanotextured substrate to provide opportunity for thin CIGS solar cells. We also developed the scalable methods for producing such nanotextured substrates. The research output in this project helps advancing the CIGS solar cells and broadly other solar cell technologies in cost reduction per unit power.
Date:
April 30, 2012
Creator:
Cui, Yi
Object Type:
Report
System:
The UNT Digital Library
Final Technical Report: Supporting Wind Turbine Research and Testing - Gearbox Durability Study
The combination of premature failure of wind turbine gearboxes and the downtime caused by those failures leads to an increase in the cost of electricity produced by the wind. There is a need for guidance to asset managers regarding how to maximize the longevity of their gearboxes in order to help keep the cost of wind energy as low as possible. A low cost of energy supports the US Department of Energy's goal of achieving 20% of the electricity in the United States produced by wind by the year 2030. DNV KEMA has leveraged our unique position in the industry as an independent third party engineering organization to study the problem of gearbox health management and develop guidance to project operators. This report describes the study. The study was conducted in four tasks. In Task 1, data that may be related to gearbox health and are normally available to wind project operators were collected for analysis. Task 2 took a more in-depth look at a small number of gearboxes to gain insight in to relevant failure modes. Task 3 brought together the previous tasks by evaluating the available data in an effort to identify data that could provide early indications …
Date:
April 30, 2012
Creator:
Malkin, Matthew
Object Type:
Report
System:
The UNT Digital Library
High Bandwidth Differential Amplifier for Shock Experiments
We developed a high bandwidth differential amplifier for gas gun shock experiments/applications. The circuit has a bandwidth > 1 GHz, and is capable of measuring signals of ≤1.5 V with a common mode rejection of 250 V. Conductivity measurements of gas gun targets are measured by flowing high currents through the targets. The voltage is measured across the target using a technique similar to a four-point probe. Because of the design of the current source and load, the target voltage is approximately 250 V relative to ground. Since the expected voltage change in the target is < 1 V, the differential amplifier must have a large common mode rejection. High pass filters suppress internal ringing of operational amplifiers. Results of bench tests are shown.
Date:
April 30, 2012
Creator:
Ross, P. W., Tran, V., Chau, R.
Object Type:
Article
System:
The UNT Digital Library
High Flux Commercial Illumination Solution with Intelligent Controls
This report summarizes the work performed at OSRAM SYLVANIA under US Department of Energy contract DE-EE0003241 for developing a high efficiency LED-based luminaire. A novel light engine module (two versions: standard and super), power supply and luminaire mechanical parts were designed and tested. At steady-state, the luminaire luminous flux is 3156 lumens (lm), luminous efficacy 97.4 LPW and CRI (Ra) 88 at a correlated color temperature (CCT) of 3507K. When the luminaire is fitted with the super version of the light engine the efficacy reaches 130 LPW. In addition, the luminaire is provided with an intelligent control network capable of additional energy savings. The technology developed during the course of this project has been incorporated into a family of products. Recently, the first product in the family has been launched.
Date:
April 30, 2012
Creator:
Ghiu, Camil
Object Type:
Report
System:
The UNT Digital Library
How can Web Archives become a critical component of today's Internet?
Presentation for the 2012 International Internet Preservation Consortium General Assembly. Discusses the possibility of live web integration with web archives, allowing for dead links to redirect to an archived page.
Date:
April 30, 2012
Creator:
Medjkoune, Leïla
Object Type:
Presentation
System:
The UNT Digital Library