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EFFECTS OF XE ION IRRADIATION AND SUBSEQUENT ANNEALING ON THE PROPERTIES OF MAGNESIUM-ALUMINATE SPINEL

Description: Single crystals of magnesium-aluminate spinel MgAl{sub 2}O{sub 4} were irradiated with 340 keV Xe{sup 2} ions at {minus}173 C ({approximately} 100 K). A fluence of 1 x 10{sup 20} Xe/m{sup 2} created an amorphous layer at the surface of the samples. The samples were annealed for 1 h at different temperatures ranging from 130 C to 880 C. Recrystallization took place in the temperature interval between 610 C and 855 C. Transmission electron microscopy (TEM) images show two distinct layers near the… more
Date: April 1, 2000
Creator: AFANASYEV, I. & AL, ET
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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AGR-1 Data Qualification Interim Report

Description: Projects for the very-high-temperature reactor (VHTR) program provide data in support of Nuclear Regulatory Commission licensing of the VHTR. Fuel and materials to be used in the reactor are tested and characterized to quantify performance in high temperature and high fluence environments. The VHTR Program has established the NGNP Data Management and Analysis System (NDMAS) to ensure that VHTR data are (1) qualified for use, (2) stored in a readily accessible electronic form, and (3) analyzed t… more
Date: August 1, 2009
Creator: Abbott, Machael
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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AGR-1 Data Qualification Report

Description: ABSTRACT Projects for the very high temperature reactor (VHTR) Technology Development Office (TDO) program provide data in support of Nuclear Regulatory Commission licensing of the VHTR. Fuel and materials to be used in the reactor are tested and characterized to quantify performance in high temperature and high fluence environments. The VHTR program has established the NGNP Data Management and Analysis System (NDMAS) to ensure that VHTR data are (1) qualified for use, (2) stored in a readily a… more
Date: March 1, 2010
Creator: Abbott, Michael
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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AGR-2 Data Qualification Interim Report

Description: Projects for the very high temperature reactor (VHTR) Technology Development Office program provide data in support of Nuclear Regulatory Commission licensing of the VHTR. Fuel and materials to be used in the reactor are tested and characterized to quantify performance in high temperature and high fluence environments. The VHTR program established the NGNP Data Management and Analysis System (NDMAS) to manage and document VHTR data qualification, for storage of the data in a readily accessible … more
Date: September 1, 2010
Creator: Abbott, Michael L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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AGR-2 Data Qualification Report for ATR Cycles 147A, 148A, 148B, and 149A

Description: This report presents the data qualification status of fuel irradiation data from the first four reactor cycles (147A, 148A, 148B, and 149A) of the on-going second Advanced Gas Reactor (AGR-2) experiment as recorded in the NGNP Data Management and Analysis System (NDMAS). This includes data received by NDMAS from the period June 22, 2010 through May 21, 2011. AGR-2 is the second in a series of eight planned irradiation experiments for the AGR Fuel Development and Qualification Program, which sup… more
Date: August 1, 2011
Creator: Abbott, Michael L. & Daum, Keith A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Isotopic Analysis of Boron as Trimethyl Borate

Description: Boron-impregnated polyethylene tape was irradiated in the Engineering Test Reactor Critical Facility to study the effect of boron as a burnable poison in reactor fuel. Isotopic analysis of the boron was performed with a conventional CEC Model 21-103 mass spectrometer. The tape was distilled off and the residual boron was converted to trimethyl borate. The reaction mixture was analyzed without separation. Good precision was obtained with samples containing less than 0.5 mg. boron. Features of th… more
Date: January 28, 1960
Creator: Abernathey, R. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutron-induced mutation experiments. Progress report, March 1, 1975-- February 29, 1976

Description: The relative mutagenic effectiveness of neutrons of different energies were compared with x radiation in mice and Drosophila oogonia employing X-linked recessive lethal and specific locus mutation tests. The energies and doses used were 0.68 MeV, 2 MeV, and 6 MeV (250 and 500$sup 0$R), and 15 MeV (250, 500, and 1000$sup 0$R). The data thus far collected from the recessive lethal test indicate that 0.68 MeV neutrons have the highest RBE among the energies tested, followed by 6 and 2 MeV. The spe… more
Date: November 1, 1975
Creator: Abrahamson, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Neutron-induced mutation experiments. Progress report, March 1, 1977--February 28, 1978. [Drosophila female gonial cell exposure]

Description: Experiments have been carried out to study the relative mutagenic effectiveness for Drosophila female germ cells of neutrons of different energies employing X-linked recessive lethal and specific locus mutation tests. The energies and doses employed to date to study X-linked lethals are 0.43 MeV (500, 1000, 1500, 1900 R (in progress)), 0.68 MeV (250, 500, 1000, 1500 R), 2 MeV (250, 500, 1000, 1500, 2000 R), 6 MeV (250, 500, 1500, 3000 R) and 15 MeV (250, 500, 1000, 1500, 3000 R). 0.43-MeV neutr… more
Date: November 1, 1977
Creator: Abrahamson, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Genetic effects of low x-ray doses. Progress report, October 1, 1975--September 30, 1976. [Drosophila oogonia]

Description: Experiments on dose-kinetics of x-ray induced sexlinked lethal mutations in Drosophila oogonia were continued. A wide range of doses was tested, with special emphasis on the low-dose range (20 to 500R). This year more data were added for O R, 200, 500, 1500R and some high doses. Oogonia of adult females were irradiated, and only one daughter from each experimental parent-female was analyzed for a new lethal in her maternal X-chromosome. Thus no clusters of mutations of identical origin are enco… more
Date: September 1, 1976
Creator: Abrahamson, S. & Meyer, H. U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Genetic effects of low x-ray doses. Progress report, October 1, 1976--September 30, 1977. [In Drosophila]

Description: A linear-quadratic model of dose-kinetics is proposed for x-ray induced recessive lethal mutations in oogonia of Drosophila. From this it should follow that at higher total doses fractionation treatments should give a lower yield of mutations than an equivalent acute exposure. A dose of 6000 R, given acutely and in 3 different fractionation regimes gave results in the expected direction for 2 x 3000 R, and a significant decrease for 3 x 2000 R and for 4 x 1500 R fractionations.
Date: September 1, 1977
Creator: Abrahamson, S. & Meyer, H.U.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reaction of Glass During Gamma Irradiation in a Saturated Tuff Environment, Part 3: Long-Term Experiments at 1x10^4 Rad/Hour

Description: Report on experiments to assess the importance of radiation effects on waste glass corrosion. This third part contains a description of the experiments, results, and discussion, with conclusions and related appendices.
Date: February 1988
Creator: Abrajano, Teofilo Aniag; Bates, John K.; Gerding, Thomas J. & Ebert, William L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Examination of the surface coating removed from K-East Basin fuel elements

Description: This report provides the results of studies conducted on coatings discovered on the surfaces of some N-Reactor spent nuclear fuel (SNF) elements stored at the Hanford K-East Basin. These elements had been removed from the canisters and visually examined in-basin during FY 1996 as part of a series of characterization tests. The characterization tests are being performed to support the Integrated Process Strategy developed to package, dry, transport, and store the SNF in an interim storage facili… more
Date: May 1, 1998
Creator: Abrefah, J.; Marschman, S.C. & Jenson, E.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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PWR AXIAL BURNUP PROFILE ANALYSIS

Description: The purpose of this activity is to develop a representative ''limiting'' axial burnup profile for pressurized water reactors (PWRs), which would encompass the isotopic axial variations caused by different assembly irradiation histories, and produce conservative isotopics with respect to criticality. The effect that the low burnup regions near the ends of spent fuel have on system reactivity is termed the ''end-effect''. This calculation will quantify the end-effects associated with Pressurized … more
Date: September 17, 2003
Creator: Acaglione, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fission product plateout/liftoff/washoff test plan. Revision 1

Description: A test program is planned in the COMEDIE loop of the Commissariat a l`Energy Atomique (CEA), Grenoble, France, to generate integral test data for the validation of computer codes used to predict fission product transport and core corrosion in the Modular High Temperature Gas-Cooled Reactor (MHTGR). The inpile testing will be performed by the CEA under contract from the US Department of Energy (DOE); the contract will be administered by Oak Ridge National Laboratory (ORNL). The primary purpose o… more
Date: May 1, 1988
Creator: Acharya, R. & Hanson, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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HRB-22 preirradiation thermal analysis

Description: This report describes the preirradiation thermal analysis of the HRB-22 capsule designed for irradiation in the removable beryllium (RB) position of the High Flux Isotope Reactor (HFIR) at Oak Ridge National Laboratory (ORNL). CACA-2 a heavy isotope and fission product concentration calculational code for experimental irradiation capsules was used to determine time dependent fission power for the fuel compacts. The Heat Engineering and Transfer in Nine Geometries (HEATING) computer code, versio… more
Date: May 1, 1995
Creator: Acharya, R. & Sawa, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fission product studies with plant dissolver solutions: IX-Iodine, X-Arsenic. SE-PC No. 61

Description: In continuing studies to characterize and identify fission product activities formed in the piles and appearing in plant dissolver solutions work was done to determine whether or not long-lived isotopes of certain elements were present. Two of the elements in this category were iodine and arsenic. The iodine isotope of particular interest was I{sup 129}. Its tellurium parent has been identified but no daughter activity attributable to iodine has been observed. The arsenic activities of interest… more
Date: January 8, 1946
Creator: Acken, M. F.; Sullivan, W. H. & Leader, G. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Power Burst Facility/Boron Neutron Capture Therapy Program for cancer treatment

Description: This monthly bulletin describes activities in the following project areas during this reporting period: supporting technology development, large animal model studies, neutron source and facility preparation, administration and common support, and PBF operations. (FI)
Date: September 1, 1990
Creator: Ackermann, A.L. (ed.) & Dorn, R.V. III.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final Report: Theoretical Studies on Radiation-Induced Transformations in Nucleic Acid Bases, May 1, 1993 - April 30, 1996

Description: In the proposal we identified several elemental molecular properties related to the effects observed in genetic material exposed to ionizing irradiation, and we studied them by means of the ab-initio quantum chemistry. The chemistry of irradiation is complex and biological consequences are significant. This includes cell death, mutations, carcinogenic transformations, etc. In the proposal we theoretically modeled several elemental processes related to the radiolysis of components of the nucleic… more
Date: April 30, 1996
Creator: Adamowicz, Ludwik
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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