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Stress Analysis of the SM-1A Reactor Vessel

Description: The stress analysis performed on the SM-lA reactor vessel and cover is presented. The msximum combined stress (51,360 psi in compression) occurs in the vessel cover during a 50 deg F/hr transient. A fatigue analysis of these stresses indicated that they could be applied safely at least 2500 times, and since the vessel is expected to receive less than 900 cycles, it should not suffer any fatigue damage. (auth)
Date: March 30, 1962
Creator: McLaughlin, D. W.; Rowekamp, B. J.; Chittum, R. A. & Aitken, C. C.
Partner: UNT Libraries Government Documents Department
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Potential Impacts of Leakage from Black Rock Reservoir on the Hanford Site Unconfined Aquifer: Initial Hypothetical Simulations of Flow and Contaminant Transport

Description: Initial scoping calculations of the unconfined aquifer at the Hanford Site were carried out for the U.S. Bureau of Reclamation (USBR) to investigate the potential impacts on the Hanford unconfined aquifer that would result from leakage from the proposed Black Rock Reservoir to the west. Although impacts on groundwater flow and contaminant transport were quantified based on numerical simulation results, the investigation represented a qualitative assessment of the potential lateral recharge that… more
Date: January 30, 2008
Creator: Freedman, Vicky L.
Partner: UNT Libraries Government Documents Department
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Specification of advanced safety modeling requirements (Rev. 0).

Description: The U.S. Department of Energy's Global Nuclear Energy Partnership has lead to renewed interest in liquid-metal-cooled fast reactors for the purpose of closing the nuclear fuel cycle and making more efficient use of future repository capacity. However, the U.S. has not designed or constructed a fast reactor in nearly 30 years. Accurate, high-fidelity, whole-plant dynamics safety simulations will play a crucial role by providing confidence that component and system designs will satisfy establishe… more
Date: June 30, 2008
Creator: Fanning, T. H. & Tautges, T. J.
Partner: UNT Libraries Government Documents Department
open access

SP-100 Program: space reactor system and subsystem investigations

Description: For a space reactor power system, a comprehensive safety program will be required to assure that no undue risk is present. This report summarizes the nuclear safety review/approval process that will be required for a space reactor system. The documentation requirements are presented along with a summary of the required contents of key documents. Finally, the aerospace safety program conducted for the SNAP-10A reactor system is summarized. The results of this program are presented to show the ty… more
Date: September 30, 1983
Creator: Harty, R.B.
Partner: UNT Libraries Government Documents Department
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Security assessment of power systems including energy storage and with the integration of wind energy. Volume I. Digital transient simulation effort consulting Agreement No. 1. Final report

Description: The purpose of the effort reported has been to adapt the MOD-2 simulation models for implementation on a digital transient stability program. This has involved: selection of an appropriate host program, examination of the host program interface, analysis of the analog models for digital implementation, FORTRAN coding of the model equations, installation and debugging on the host program, and final model verification. Synchronous machine equations are analyzed, with particular emphasis on numeri… more
Date: June 30, 1982
Creator: Anderson, P. M.
Partner: UNT Libraries Government Documents Department
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Advanced Engine/Aftertreatment System R&D

Description: Navistar and ORNL established this CRADA to develop diesel engine aftertreatment configurations and control strategies that could meet emissions regulations while maintaining or improving vehicle efficiency. The early years of the project focused on reducing the fuel penalty associated with lean NOx trap (LNT, also known as NOx adsorber catalyst) regeneration and desulfation. While Navistar pursued engine-based (in-cylinder) approaches to LNT regeneration, complementary experiments at ORNL focu… more
Date: September 30, 2011
Creator: Pihl, J.; West, B.; Toops, T.; Adelman, B. (Navistar, Inc.) & Derybowski, E. (Navistar, Inc.)
Partner: UNT Libraries Government Documents Department
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A new class of accelerated kinetic Monte Carlo algorithms

Description: Kinetic (aka dynamic) Monte Carlo (KMC) is a powerful method for numerical simulations of time dependent evolution applied in a wide range of contexts including biology, chemistry, physics, nuclear sciences, financial engineering, etc. Generally, in a KMC the time evolution takes place one event at a time, where the sequence of events and the time intervals between them are selected (or sampled) using random numbers. While details of the method implementation vary depending on the model and con… more
Date: November 30, 2011
Creator: Bulatov, V V; Oppelstrup, T & Athenes, M
Partner: UNT Libraries Government Documents Department
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Analysis of Voltage Signals from Superconducting Accelerator Magnets

Description: We present two techniques used in the analysis of voltage tap data collected during recent tests of superconducting magnets developed by the Superconducting Magnet Program at Lawrence Berkeley National Laboratory. The first technique was used on a quadrupole to provide information about quench origins that could not be obtained using the time-of-flight method. The second technique illustrates the use of data from transient flux imbalances occurring during magnet ramping to diagnose changes in t… more
Date: October 30, 2009
Creator: Lizarazo, J.; Caspi, S.; Ferracin, P.; Joseph, J.; Lietzke, A. F.; Sabbi, G. L. et al.
Partner: UNT Libraries Government Documents Department
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Reciprocal interactions between Beta1-integrin and epidermal growth factor in three-dimensional basement membrane breast cultures: A different perspective in epithelial biology

Description: Anchorage and growth factor independence are cardinal features of the transformed phenotype. Although it is logical that the two pathways must be coregulated in normal tissues to maintain homeostasis, this has not been demonstrated directly. We showed previously that down-modulation of {beta}1-integrin signaling reverted the malignant behavior of a human breast tumor cell line (T4-2) derived from phenotypically normal cells (HMT-3522) and led to growth arrest in a threedimensional (3D) basement… more
Date: September 30, 1998
Creator: Wang, F.; Weaver, V. M.; Petersen, O. W.; Larabell, C. A.; Dedhar, S.; Briand, P. et al.
Partner: UNT Libraries Government Documents Department
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Results of reverse flow experimental tests for C operational charge-discharge tube at low tub powers

Description: The purpose of this report is to present the results of laboratory experiments in which coolant water flowed backwards through a ``C`` reactor process tube with operational charge-discharge front fittings under conditions of typical reactor rear header pressures and post-scram rear header water temperature and tube powers. This information is of value in planning and interpreting transient experiments investigating the consequences of the rupture of reactor front face piping to a single tube.
Date: April 30, 1959
Creator: Fitzsimmons, D. E. & Hesson, G. M.
Partner: UNT Libraries Government Documents Department
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Laser smoothing of sub-micron grooves in hydroxyl-rich fused silica

Description: Nano- to micrometer-sized surface defects on UV-grade fused silica surfaces are known to be effectively smoothed through the use of high-temperature localized CO{sub 2} laser heating, thereby enhancing optical properties. However, the details of the mass transport and the effect of hydroxyl content on the laser smoothing of defective silica at submicron length scales is still not completely understood. In this study, we examine the morphological evolution of sub-micron, dry-etched periodic surf… more
Date: October 30, 2009
Creator: Shen, N; Matthews, M J; Fair, J E; Britten, J A; Nguyen, H T; Cooke, D et al.
Partner: UNT Libraries Government Documents Department
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Materials-Enabled High-Efficiency (MEHE) Heavy-Duty Diesel Engines

Description: The purpose of this Cooperative Research and Development Agreement (CRADA) between UTBattelle, Inc. and Caterpillar, Inc. was to improve diesel engine efficiency by incorporating advanced materials to enable higher combustion pressures and temperatures necessary for improved combustion. The project scope also included novel materials for use in advanced components and designs associated with waste-heat recovery and other concepts for improved thermal efficiency. Caterpillar initially provided O… more
Date: September 30, 2011
Creator: Kass, M. & Veliz, M. (Caterpillar, Inc.)
Partner: UNT Libraries Government Documents Department
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Integrated Sensing and Controls for Coal Gasification - Development of Model-Based Controls for GE's Gasifier and Syngas Cooler

Description: This report summarizes the achievements and final results of this program. The objective of this program is to develop a comprehensive systems approach to integrated design of sensing and control systems for an Integrated Gasification Combined Cycle (IGCC) plant, using advanced model-based techniques. In particular, this program is focused on the model-based sensing and control system design for the core gasification section of an IGCC plant. The overall approach consists of (i) developing a fi… more
Date: December 30, 2010
Creator: Kumar, Aditya
Partner: UNT Libraries Government Documents Department
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Progress report on development of intermediate fidelity full assembly analysis methods.

Description: While high fidelity modeling capabilities for various physics phenomena are being pursued under advanced modeling and simulation initiatives under the DOE Office of Nuclear Energy, they generally rely on high-performance computation facilities and are too expensive to be used for parameter-space exploration or design analysis. One-dimensional system codes have been used for a long time and have reached a degree of maturity, but limit their validity to specific applications. Thus, an intermediat… more
Date: September 30, 2011
Creator: Hu, R. & Fanning, T. H. (Nuclear Engineering Division)
Partner: UNT Libraries Government Documents Department
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Spin Echo and Interference in Synchrotrons

Description: Spin dynamics in crossing a single depolarization resonance is a well-studied subject. One well-known example is that of Froissart and Stora in 1960. More is needed to complete the understanding, particularly of the transient effects, when crossing a single resonance, but question arises what happens if we cross two resonances or cross a single resonance twice. When a resonance is crossed twice, the particle's spin dynamics encounters two additional phenomena. First, the two crossings will inte… more
Date: November 30, 2006
Creator: Chao, Alex
Partner: UNT Libraries Government Documents Department
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An evaluation of the active fracture concept with modelingunsaturated flow and transport in a fractured meter-sized block ofrock

Description: Numerical simulation is an effective and economical tool for optimally designing laboratory experiments and deriving practical experimental conditions. We executed a detailed numerical simulation study to examine the active fracture concept (AFC, Liu et al., 1998) using a cubic meter-sized block model. The numerical simulations for this study were performed by applying various experimental conditions, including different bottom flow boundaries, varying injection rates, and different fracture-ma… more
Date: May 30, 2003
Creator: Seol, Yongkoo; Kneafsey, Timothy J. & Ito, Kazumasa
Partner: UNT Libraries Government Documents Department
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Hydrogen Production for Fuel Cells Via Reforming Coal-Derived Methanol

Description: Hydrogen can be produced from many feedstocks including coal. The objectives of this project are to establish and prove a hydrogen production pathway from coal-derived methanol for fuel cell applications. This progress report is the seventh report submitted to the DOE reporting on the status and progress made during the course of the project. This report covers the time period of April 1-June 31, 2005. This quarter saw progress in these areas. These areas are: (1) Steam reformer transient respo… more
Date: June 30, 2005
Creator: Erickson, Paul A.
Partner: UNT Libraries Government Documents Department
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Hydrogen Production for Fuel Cells Via Reforming Coal-Derived Methanol

Description: Hydrogen can be produced from many feedstocks including coal. The objectives of this project are to establish and prove a hydrogen production pathway from coal-derived methanol for fuel cell applications. This progress report is the eighth report submitted to the DOE reporting on the status and progress made during the course of the project. This report covers the time period of October 1, 2004-September 30, 2005 and includes an entire review of the progress for year 2 of the project. This year… more
Date: September 30, 2005
Creator: Erickson, Paul A.
Partner: UNT Libraries Government Documents Department
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Pilot-Scale Demonstration of a Novel, Low-Cost Oxygen Supply Process and its Integration with Oxy-Fuel Coal-Fired Boilers: Final Report

Description: In order to achieve DOE targets for carbon dioxide capture, it is crucial not only to develop process options that will generate and provide oxygen to the power cycle in a cost-effective manner compared to the conventional oxygen supply methods based on cryogenic air separation technology, but also to identify effective integration options for these new technologies into the power cycle with carbon dioxide capture. The Linde/BOC developed Ceramic Autothermal Recovery (CAR) process remains an in… more
Date: September 30, 2008
Creator: Krishnamurthy, Krish; Acharya, Divy & Fitch, Frank
Partner: UNT Libraries Government Documents Department
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EGR Control for Emisson Reduction Using Fast Response Sensors - Phase 1A

Description: The overall objective of this project was to develop exhaust gas recirculation (EGR) control strategies using fast-response Particulate Matter (PM) sensors and NOx sensors to improve the quality of particulate and gaseous emissions from diesel engines. This project initially comprised three phases: (1) Phase IA - sensor requirements to meet PM sensor specifications, NOx sensor assessment, and initial model development for EGR control; (2) Phase IB - continue development on PM and NOx sensors, i… more
Date: September 30, 2008
Creator: Gravel, Roland; Conley, Jason & Kittelson, David
Partner: UNT Libraries Government Documents Department
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Photo-Induced Spin-State Conversion in Solvated Transition Metal Complexes Probed via Time-Resolved Soft X-ray Spectroscopy

Description: Solution-phase photoinduced low-spin to high-spin conversion in the FeII polypyridyl complex [Fe(tren(py)3)]2+ (where tren(py)3 is tris(2-pyridylmethyliminoethyl)amine) has been studied via picosecond soft X-ray spectroscopy. Following 1A1 --> 1MLCT (metal-to-ligand charge transfer) excitation at 560 nm, changes in the iron L2- and L3-edges were observed concomitant with formation of the transient high-spin 5T2 state. Charge-transfer multiplet calculations coupled with data acquired on low-s… more
Date: April 30, 2010
Creator: Huse, Nils; Kim, Tae Kyu; Jamula, Lindsey; McCusker, James K.; de Groot, Frank M. F. & Schoenlein, Robert W.
Partner: UNT Libraries Government Documents Department
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