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Radiation-induced segregation in HT-9 martensitic steel

Description: Miniature notched-bar specimens of normalized and tempered HT-9 were neutron irradiated to approx.13 dpa and broken at liquid nitrogen temperatures in a UHV chamber. Fracture surfaces were analyzed using scanning Auger electron spectroscopy. Following irradiation at 410/sup 0/C, the fracture surface contained a small number of large relatively smooth facets, which are thought to be prior austenite grain boundaries. Strong segregation of Ni, Cr, Si, and P was detected at these surfaces, the rema… more
Date: January 1, 1986
Creator: Clausing, R.E.; Heatherly, L.; Faulkner, R.G.; Rowcliffe, A.F. & Farrell, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Dose-rate models for human survival after exposure to ionizing radiation

Description: This paper reviews new estimates of the L/sub 50/ in man by Mole and by Rotblat, the biological processes contributing to hematologic death, the collection of animal experiments dealing with hematologic death, and the use of regression analysis to make new estimates of human mortality based on all relevant animal studies. Regression analysis of animal mortality data has shown that mortality is dependent strongly on dose rate, species, body weight, and time interval over which the exposure is de… more
Date: January 1, 1986
Creator: Jones, T.D.; Morris, M.D. & Young, R.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Effect of irradiation-induced defects on fusion reactor ceramics

Description: Structural, thermal, and electrical properties critical to performance of ceramics in a fusion environment can be profoundly altered by irradiation effects. Neutron damage may cause swelling, reduction of thermal conductivity, increase in dielectric loss, and either reduction or enhancement of strength depending on the crystal structure and defect content of the material. Absorption of ionizing energy inevitably leads to degradation of insulating properties, but these changes can be reduced by … more
Date: January 1, 1986
Creator: Clinard, F.W. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Literature review of the concentration ratios of selected radionuclides in freshwater and marine fish

Description: Concentration ratios (CR's) used for modeling the uptake and food chain transport of radionuclides in fish have usually been conservative; that is, at the high end of reported values. This practice ensures that the dose to the consumer of contaminated fish will not be underestimated. In many models, however, conservative values have been used for all variables that have any uncertainty associated with them. As a result the dose to the consumer is overestimated. Realistic CR values need to be de… more
Date: September 1, 1986
Creator: Poston, T. M. & Klopfer, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tensile and fracture properties of EBR-II-irradiated V-15Cr-5Ti containing helium

Description: The alloy V-15Cr-5Ti was cyclotron-implanted with 80 appM He and subsequently irradiated in the Experimental Breeder Reactor (EBR-II) to 30 dpa. The same alloy was also irradiated in the 10, 20, and 30% cold-worked conditions. Irradiation temperatures ranged from 400 to 700/sup 0/C. No significant effects of helium on mechanical properties were found in this temperature range although the neutron irradiation shifted the temperature of transition from cleavage to ductile fracture to about 625/su… more
Date: January 1, 1986
Creator: Grossbeck, M.L. & Horak, J.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Measurement of energy deposition near high energy, heavy ion tracks. Progress report, December 1982-April 1985

Description: The microscopic spatial distribution of energy deposition in irradiated tissue plays a significant role in the final biological effect produced. Therefore, it is important to have accurate microdosimetric spectra of radiation fields used for radiobiology and radiotherapy. The experiments desribed here were designed to measure the distributions of energy deposition around high energy heavy ion tracks generated at Lawrence Berkeley Laboratory's Bevalac Biomedical Facility. A small proportional co… more
Date: August 1, 1986
Creator: Metting, N.F.; Braby, L.A.; Rossi, H.H.; Kliauga, P.J.; Howard, J.; Schimmerling, W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transient hardened power FETs

Description: N-channel power FETs offer significant advantages in power conditioning circuits. Similiarily to all MOS technologies, power FET devices are vulnerable to ionizing radiation, and are particularily susceptible to burn-out in high dose rate irradiations (>1E10 rads(Si)/sec.), which precludes their use in many military environments. This paper will summarize the physical mechanisms responsible for burn-out, and discuss various fabrication techniques designed to improve the transient hardness of po… more
Date: January 1, 1986
Creator: Dawes, W. R., Jr.; Fischer, T. A.; Huang, C. C. C.; Meyer, W. J.; Smith, C. S.; Blanchard, R. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparison of the Relative Importance of Helium and Vacancy Accumulation in Void Nucleation

Description: Void nucleation in irradiated austenitic stainless steels generally requires the presence of either residual or transmutant gases. Classical nucleation rates are much too low to account for the number of voids observed at temperatures greater than about 450/sup 0/C. An alternate path is generally believed to be responsible for void formation; viz. the growth of gas-stabilized bubbles until they reach a critical size beyond which further gas accumulation is not required to promote growth. Two li… more
Date: June 1, 1986
Creator: Stoller, R. E. & Odette, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Superheated-steam test of ethylene propylene rubber cables using a simultaneous aging and accident environment

Description: The superheated-steam test exposed different ethylene propylene rubber (EPR) cables and insulation specimens to simultaneous aging and a 21-day simultaneous accident environment. In addition, some insulation specimens were exposed to five different aging conditions prior to the 21-day simultaneous accident simulation. The purpose of this superheated-steam test (a follow-on to the saturated-steam tests (NUREG/CR-3538)) was to: (1) examine electrical degradation of different configurations of EPR… more
Date: June 1, 1986
Creator: Bennett, P. R.; St. Clair, S. D. & Gilmore, T. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Applied Beta Dosimetry

Description: Measurements of beta and/or nonpenetrating exposure results is complicated and past techniques and capabilities have resulted in significant inaccuracies in recorded results. Current developments have resulted in increased capabilities which make the results more accurate and should result in less total exposure to the work force. Continued development of works in progress should provide equivalent future improvements.
Date: January 1, 1986
Creator: Rich, B.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hazards Control Department annual technology review, 1985

Description: The report highlights research performed from October 1984 to September 1985. The major sections cover the areas of industrial hygiene, aerosol physics, health physics, fire science, dosimetry, criticality safety, and safety analysis. Separate abstracts have been prepared for individual papers. (ACR)
Date: June 1, 1986
Creator: Griffith, R.V. & Anderson, K.J. (eds.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of magnetic mirror systems for nuclear testing applications

Description: Several system studies have concluded that the small size and steady state nature of magnetic mirror systems provide attractive features for nuclear-testing applications. The principle shortcoming of mirror systems is their small data base relative to that of tokamaks. This paper summarizes the present data base and describes experiments that could be carried out with small modifications of existing facilities to explore plasma physics issues associated with the production of high neutron fluxe… more
Date: August 7, 1986
Creator: Simonen, T. C.; Futch, A. H. & Kaiser, T. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cascade diffusion theory of displacement-induced point defect concentration and flux fluctuations

Description: A theoretical approach, which has been developed to assess the fluctuations in point defect concentrations and fluxes to sinks that are induced by the production of point defects in spatially and temporally discrete cascades, is summarized. Solutions for cascade dissipation are outlined for the case where cascades occur in a homogeneous lossy medium as well as for the more involved geometries where cascades occur in the presence of a nearby dislocation or cavity. By superposition of solutions r… more
Date: 1986~
Creator: Mansur, L.K.; Brailsford, A.D. & Coghlan, W.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Health and Environmental Research: summary of accomplishments. Volume 2

Description: This is an account of some of the accomplishments of the health and environmental research program performed in national laboratories, universities, and research institutes. Both direct and indirect societal benefits emerged from the new knowledge provided by the health and environmental research program. In many cases, the private sector took this knowledge and applied it well beyond the mission of supporting the defense and energy needs of the Nation. Industrial and medical applications, for … more
Date: August 1, 1986
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Communication in hazardous environments

Description: Radios were investigated for use in hazardous environments where protective breathing equipment such as plastic suits and respirators interfere with communication. A radio system, manufactured by Communications-Applied technology (C-AT), was identified that was designed specifically for hazardous environment communications. This equipment had been used successfully by the US Army and NASA for several years. C-AT equipment was evaluated in plantwide applications at the Savannah River Plant (SRP)… more
Date: January 1, 1986
Creator: Rankin, W N & Herold, T R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Void-precipitate association during neutron irradiation of austenitic stainless steel

Description: Microstructural data has recently become available on a single heat of 316 stainless steel irradiated in EBR-II and HFIR, over a wide range of irradiation temperature (55 to 750/sup 0/C), dose (7 to 75 dpa), and helium generation rate (0.5 to 55 at. ppM He/dpa). Extensive information on precipitate compositions and characteristics are included. The data reveal several important relationships between the development of voids and precipitation. Precipitate associated voids dominate the swelling o… more
Date: January 1, 1986
Creator: Pedraza, D. F. & Maziasz, P. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Semiconductor detectors and readout electronics: present directions and outstanding problems

Description: A brief discussion is given of the status of semiconductor detectors, including microstrip detectors, charge-coupled devices, and semiconductor drift devices. Radiation damage and monolithic integration of readout electronics are also covered. (LEW)
Date: September 1, 1986
Creator: Radeka, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Specific surface area behavior of a dissolving population of particles. Augmenting Mercer Dissolution Theory

Description: Specific surface area (Sp) measurements were made on two uranium oxide aerosol materials before and after in vitro dissolution studies were performed on the materials. The results of these Sp measurements were evaluated relative to predictions made from extending Mercer dissolution theory to describe the Sp behavior of a dissolving population of particles.
Date: January 1, 1986
Creator: Scripsick, R.C. & Rothenberg, S.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Environmental monitoring at the Lawrence Livermore National Laboratory. 1985 annual report

Description: Results are reported of the Environmental Quality Verification Program, which is an expanded continuation of the program of environmental monitoring previously carried out by the Environmental Measurements Group of the Hazards Control Department. Data are reported on air, soils, water, vegetation, foodstuffs, and annual radiation doses at perimeter of facility.
Date: February 1, 1986
Creator: Griggs, K.S. & Buddemeier, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Results from some anode wire aging tests

Description: Using twin setups to test anode wire aging in small gas avalanche tubes, a variety of different gas mixtures were tried and other parameters were varied to study their effects upon the gain drop, nomalized to charge transfer: - 1/Q dI/I. This was found to be quite sensitive to the purity of the gases, and also sensitive to the nominal gain and the gas flow rate. The wire surface material can also significantly affect the aging, as can additives, such as ethanol or water vapor. Certain gas mixtu… more
Date: January 1, 1986
Creator: Juricic, I. & Kadyk, J.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Preliminary Assessment of Radiological Doses in Alternative Waste Management Systems Without an MRS Facility

Description: This report presents generic analyses of radiological dose impacts of nine hypothetical changes in the operation of a waste management system without a monitored retrievable storage (MRS) facility. The waste management activities examined in this study include those for handling commercial spent fuel at nuclear power reactors and at the surface facilities of a deep geologic repository, and the transportation of spent fuel by rail and truck between the reactors and the repository. In the referen… more
Date: June 1, 1986
Creator: Schneider, K. J.; Pelto, P. J.; Daling, P. M.; Lavender, J. C. & Fecht, B. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Muon fluence measurements at the site boundary for 1985

Description: Muon fluence (muons cm/sup -2/) was measured downstream of the experimental area beamlines, just beyond the Fermilab site boundary at Route 38. The purpose of these measurements was to obtain an estimate of the yearly off-site radiation exposure to the general population due to accelerator-produced muons during the 1985 800 GeV run.
Date: March 1, 1986
Creator: Elwyn, A.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

US/French Joint Research Program regarding the behavior of polymer base materials subjected to beta radiation. Volume 1. Phase-1 normalization results

Description: As part of the ongoing multi-year joint NRC/CEA international cooperative test program to investigate the dose-damage equivalence of gamma and beta radiation on polymer base materials, dosimetry and ethylene-propylene rubber (EPR) specimens were exchanged, irradiated, and evaluated for property changes at research facilities in the US (Sandia National Laboratories) and France (Compagnie ORIS Industrie). The purpose of this Phase-1 test series was to normalize and cross-correlate the results obt… more
Date: June 1, 1986
Creator: Wyant, F.J.; Buckalew, W.H.; Chenion, J.; Carlin, F.; Gaussens, G.; Le Tutour, P. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Safety analysis of the existing 851 Firing Facility

Description: A safety analysis was performed to determine if normal operations and/or potential accidents at the 851 Firing Facility at Site 300 could present undue hazards to the general public, personnel at Site 300, or have an adverse effect on the environment. The normal operations and credible accidents that might have an effect on these facilities or have off-site consequences were considered. It was determined by this analysis that all but two of the hazards were either low or of the type or magnitud… more
Date: June 5, 1986
Creator: Odell, B.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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