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Relationship between repair processes and mutation induction in bacteria. [UV radiation; methyl methanesulfonate; N-methyl-N/sup 1/-nitro-N-nitrosoguanidine; N-methyl-N-nitrosourea; N-ethyl-N-nitrosourea; ethyl methanesulfanate; N-ethyl-nitrosoguanidine; 4-nitroquinoline 1-oxide]

Description: The main repair and replication-associated processes that can influence the induction of mutations by various mutagens in bacteria are reviewed. These include both constitutive and induced, error-free and error-prone systems. The mutation yield from a treatment with a mutagen can be markedly affected by which of these systems is operating in a given bacterial species or strain. The effect of these systems on mutation induction by ultraviolet light, monofunctional alkylating agents, base analogu… more
Date: January 1, 1979
Creator: Kimball, R F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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MObIUS (Massive Object Integrated Universal Store): A Survey Toward a More General Framework

Description: General frameworks for distributed computing are slowly evolving out of Grid, Peer Architecture, and Web Services. The following results from a summer long survey into distributing computing practices have revealed three things. One, that Legion and Cactus-G have achieved the most in terms of providing an all-purpose application environment. Two, that extending a local programming environment to operate in a highly distributed fashion can be facilitated with toolkits like Globus. Three, that bu… more
Date: June 7, 2004
Creator: Sirp, J K & Brugger, S T
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NEAMS Update. Quarterly Report for October - December 2011.

Description: The Advanced Modeling and Simulation Office within the DOE Office of Nuclear Energy (NE) has been charged with revolutionizing the design tools used to build nuclear power plants during the next 10 years. To accomplish this, the DOE has brought together the national laboratories, U.S. universities, and the nuclear energy industry to establish the Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program. The mission of NEAMS is to modernize computer modeling of nuclear energy systems and … more
Date: February 16, 2012
Creator: Bradley, K. (Nuclear Engineering Division)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Validation of SCALE for High Temperature Gas-Cooled Reactors Analysis

Description: This report documents verification and validation studies carried out to assess the performance of the SCALE code system methods and nuclear data for modeling and analysis of High Temperature Gas-Cooled Reactor (HTGR) configurations. Validation data were available from the International Handbook of Evaluated Reactor Physics Benchmark Experiments (IRPhE Handbook), prepared by the International Reactor Physics Experiment Evaluation Project, for two different HTGR designs: prismatic and pebble bed… more
Date: August 1, 2012
Creator: Ilas, Germina; Ilas, Dan; Kelly, Ryan P & Sunny, Eva E
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High Spectral Resolution Infrared and Raman Lidar Observations for the ARM Program: Clear and Cloudy Sky Applications

Description: This grant began with the development of the Atmospheric Emitted Radiance Interferometer (AERI) for ARM. The AERI has provided highly accurate and reliable observations of downwelling spectral radiance (Knuteson et al. 2004a, 2004b) for application to radiative transfer, remote sensing of boundary layer temperature and water vapor, and cloud characterization. One of the major contributions of the ARM program has been its success in improving radiation calculation capabilities for models and rem… more
Date: June 17, 2009
Creator: Henry Revercomb, David Tobin, Robert Knuteson, Lori Borg, Leslie Moy
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NEAMS update quarterly report for January - March 2012.

Description: Quarterly highlights are: (1) The integration of Denovo and AMP was demonstrated in an AMP simulation of the thermo-mechanics of a complete fuel assembly; (2) Bison was enhanced with a mechanistic fuel cracking model; (3) Mechanistic algorithms were incorporated into various lower-length-scale models to represent fission gases and dislocations in UO2 fuels; (4) Marmot was improved to allow faster testing of mesoscale models using larger problem domains; (5) Component models of reactor piping we… more
Date: May 10, 2012
Creator: Bradley, K. S.; Hayes, S.; Pointer, D.; Summers, R.; Sadasivan, P.; Sun, X. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser hazard analysis for airborne AURA (Big Sky variant) Proteus platform.

Description: A laser safety and hazard analysis was performed for the airborne AURA (Big Sky Laser Technology) lidar system based on the 2000 version of the American National Standard Institute's (ANSI) Standard Z136.1, for the Safe Use of Lasers and the 2000 version of the ANSI Standard Z136.6, for the Safe Use of Lasers Outdoors. The AURA lidar system is installed in the instrument pod of a Proteus airframe and is used to perform laser interaction experiments and tests at various national test sites. The … more
Date: February 1, 2004
Creator: Augustoni, Arnold L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results of the Simulation of the HTR-Proteus Core 4.2 Using PEBBED-COMBINE: FY10 Report

Description: ABSTRACT The Idaho National Laboratory’s deterministic neutronics analysis codes and methods were applied to the computation of the core multiplication factor of the HTR-Proteus pebble bed reactor critical facility. This report is a follow-on to INL/EXT-09-16620 in which the same calculation was performed but using earlier versions of the codes and less developed methods. In that report, results indicated that the cross sections generated using COMBINE-7.0 did not yield satisfactory estimates o… more
Date: July 1, 2010
Creator: Gougar, Hans
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Remote Sensing and In-Situ Observations of Arctic Mixed-Phase and Cirrus Clouds Acquired During Mixed-Phase Arctic Cloud Experiment: Atmospheric Radiation Measurement Uninhabited Aerospace Vehicle Participation

Description: The Atmospheric Radiation Monitor (ARM) uninhabited aerospace vehicle (UAV) program aims to develop measurement techniques and instruments suitable for a new class of high altitude, long endurance UAVs while supporting the climate community with valuable data sets. Using the Scaled Composites Proteus aircraft, ARM UAV participated in Mixed-Phase Arctic Cloud Experiment (M-PACE), obtaining unique data to help understand the interaction of clouds with solar and infrared radiation. Many measuremen… more
Date: March 18, 2005
Creator: McFarquhar, G. M.; Freer, M.; Um, J.; McCoy, R. & Bolton, W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

HTR-PROTEUS PEBBLE BED EXPERIMENTAL PROGRAM CORES 9 & 10: COLUMNAR HEXAGONAL POINT-ON-POINT PACKING WITH A 1:1 MODERATOR-TO-FUEL PEBBLE RATIO

Description: PROTEUS is a zero-power research reactor based on a cylindrical graphite annulus with a central cylindrical cavity. The graphite annulus remains basically the same for all experimental programs, but the contents of the central cavity are changed according to the type of reactor being investigated. Through most of its service history, PROTEUS has represented light-water reactors, but from 1992 to 1996 PROTEUS was configured as a pebble-bed reactor (PBR) critical facility and designated as HTR-PR… more
Date: March 1, 2013
Creator: Bess, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HTR-PROTEUS PEBBLE BED EXPERIMENTAL PROGRAM CORES 5, 6, 7, & 8: COLUMNAR HEXAGONAL POINT-ON-POINT PACKING WITH A 1:2 MODERATOR-TO-FUEL PEBBLE RATIO

Description: PROTEUS is a zero-power research reactor based on a cylindrical graphite annulus with a central cylindrical cavity. The graphite annulus remains basically the same for all experimental programs, but the contents of the central cavity are changed according to the type of reactor being investigated. Through most of its service history, PROTEUS has represented light-water reactors, but from 1992 to 1996 PROTEUS was configured as a pebble-bed reactor (PBR) critical facility and designated as HTR-PR… more
Date: March 1, 2013
Creator: Bess, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HTR-PROTEUS Pebble Bed Experimental Program Cores 1, 1A, 2, and 3: Hexagonal Close Packing with a 1:2 Moderator-to-Fuel Pebble Ratio

Description: In its deployment as a pebble bed reactor (PBR) critical facility from 1992 to 1996, the PROTEUS facility was designated as HTR-PROTEUS. This experimental program was performed as part of an International Atomic Energy Agency (IAEA) Coordinated Research Project (CRP) on the Validation of Safety Related Physics Calculations for Low Enriched HTGRs. Within this project, critical experiments were conducted for graphite moderated LEU systems to determine core reactivity, flux and power profiles, rea… more
Date: March 1, 2012
Creator: Bess, John D.; Dolphin, Barbara H.; Sterbentz, James W.; Snoj, Luka; Lengar, Igor & Köberl, Oliver
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

FY2012 Summary of Tasks Completed on Proteus-Thermal Work.

Description: PROTEUS is a suite of the neutronics codes, both old and new, that can be used within the SHARP codes being developed under the NEAMS program. Discussion here is focused on updates and verification and validation activities of the SHARP neutronics code, DeCART, for application to thermal reactor analysis. As part of the development of SHARP tools, the different versions of the DeCART code created for PWR, BWR, and VHTR analysis were integrated. Verification and validation tests for the integrat… more
Date: June 6, 2012
Creator: Lee, C.H. & Smith, M.A. (Nuclear Engineering Division)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

HTR-PROTEUS PEBBLE BED EXPERIMENTAL PROGRAM CORES 9 & 10: COLUMNAR HEXAGONAL POINT-ON-POINT PACKING WITH A 1:1 MODERATOR-TO-FUEL PEBBLE RATIO

Description: PROTEUS is a zero-power research reactor based on a cylindrical graphite annulus with a central cylindrical cavity. The graphite annulus remains basically the same for all experimental programs, but the contents of the central cavity are changed according to the type of reactor being investigated. Through most of its service history, PROTEUS has represented light-water reactors, but from 1992 to 1996 PROTEUS was configured as a pebble-bed reactor (PBR) critical facility and designated as HTR-PR… more
Date: March 1, 2014
Creator: Bess, John D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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