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Tumor production in Syrian hamsters following inhalation of PuO/sub 2/--ZrO/sub 2/ aerosol

Description: Syrian golden hamsters of both sexes were exposed to aerosols of ZrO/sub 2/ containing PuO/sub 2/. The starting material in the aerosol generator also had a small amount of /sup 57/Co added as a tracer. The mixture of all three constituents was nebulized and the droplets passed through a heating column at 1000/sup 0/C. Aerosol sampling was accomplished with a cascade impactor and electrostatic precipitator. The median aerodynamic diameters in all inhalation runs were approximately 2 ..mu..m wit… more
Date: January 1, 1978
Creator: Thomas, R. G. & Smith, D. M.
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Partner: UNT Libraries Government Documents Department
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Calculation of particulate dispersion in a design-basis tornadic storm from the Atomics International Nuclear Material Development Facility, Santa Susana, California

Description: A three-dimensional numerical model is used to calculate ground-level air concentration and deposition (due to precipitation scavenging) after a hypothetical tornado strike at the Atomics International Nuclear Material Development Facility at Santa Susana, California. Plutonium particles less than 20 ..mu..m in diameter are assumed to be lifted into the tornadic storm cell by the vortex. The rotational characteristics of the tornadic storm are embedded within the larger mesoscale flow of the st… more
Date: July 1, 1980
Creator: Pepper, D.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Reducing radon daughter background in alpha continuous air monitors

Description: Alpha continuous air monitors are instruments designed to sample aerosols which may contain alpha-emitting radionuclides and, in near-real time, to monitor the sample for alpha emissions. This process is subject to interference from radon decay products. The usual method for overcoming this interference is by signal processing or data processing in such a manner as to accurately subtract a portion of the background from the transuranic count. An innovative alternative approach has been jointly … more
Date: January 1, 1991
Creator: Rodgers, J.C. (Los Alamos National Lab., NM (United States)) & McFarland, A.R. (Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering)
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Partner: UNT Libraries Government Documents Department
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Characterization of the solid, airborne materials created when UF/sub 6/ reacts with moist air flowing in single-pass mode

Description: A series of experiments has been performed in which UF/sub 6/ was released into flowing air in order to characterize the solid particulate material produced under non-static conditions. In two of the experiments, the aerosol was allowed to stagnate in a static chamber after release and examined further but in the other experiments characterization was done only on material collected a few seconds after release. Transmission electron microscopy and mass measurement by cascaded impactor were used… more
Date: October 1, 1985
Creator: Pickrell, P. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of explosively venting aerosol-sized particles through earth-containment systems on the cloud-stabilization height

Description: A method of approximating the cloud stabilization height for aerosol-sized particles vented explosively through earth containment systems is presented. The calculated values for stabilization heights are in fair agreement with those obtained experimentally.
Date: July 1, 1980
Creator: Dyckes, G.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Assessment of the response of spent fuel transports to malevolent acts

Description: This paper describes the results of a program conducted at Sandia National Laboratories (SNL) for the US Department of Energy to provide an experimental data base for more accurately assessing the radiological consequences from a hypothetical sabotage attack on a spent fuel shipping cask. The primary objectives of the program were limited to: (1) evaluating the effectiveness of selected high explosive devices (HED) in breaching full-size spent fuel casks, (2) quantifying and characterizing rele… more
Date: December 20, 1983
Creator: Sandoval, R.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radon and aerosol release from open-pit uranium mining

Description: The quantity of /sup 222/Rn (hereafter called radon) released per unit of uranium produced from open pit mining has been determined. A secondary objective was to determine the nature and quantity of airborne particles resulting from mine operations. To accomplish these objectives, a comprehensive study of the release rates of radon and aerosol material to the atmosphere was made over a one-year period from April 1979 to May 1980 at the Morton Ranch Mine which was operated by United Nuclear Corp… more
Date: August 1, 1982
Creator: Thomas, V.W.; Nielson, K.K. & Mauch, M.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Comparison of aerosol behavior during sodium fires in CSTF with the HAA-3B code. [LMFBR]

Description: Four large-scale tests using sodium fire aerosol sources have been carried out in the Containment System Test Facility (CSTF). Two of the tests employed pool fires and two used spray fires as the aerosol source. Because the CSTF containment vessel is approximately half-scale (20.3 m in height) of a typical reactor building, the CSTF results have provided a large-scale proof test of the HAA-3B Code. For the two pool fire tests, the measured and predicted airborne concentrations were in good agre… more
Date: March 1, 1980
Creator: Postma, A.K. & Owen, R.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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User's manual for DWNWND: an interactive Gaussian plume atmospheric transport model with eight dispersion parameter options

Description: The most commonly used approach for estimating the atmospheric concentration and deposition of material downwind from its point of release is the Gaussian plume atmospheric dispersion model. Two of the critical parameters in this model are sigma/sub y/ and sigma/sub z/, the horizontal and vertical dispersion parameters, respectively. A number of different sets of values for sigma/sub y/ and sigma/sub z/ have been determined empirically for different release heights and meteorological and terrai… more
Date: May 1, 1980
Creator: Fields, D. E. & Miller, C. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Characterization of airborne plutonium-bearing particles from a nuclear fuel reprocessing plant

Description: The elemental compositions, sizes, structures, and /sup 239/Pu contents were determined for 299 plutonium-bearing particles isolated from airborne particles collected at various locations in the exhaust from a nuclear fuel reprocessing facility. These data were compared with data from natural aerosol particles. Most of the collected particles were composed of aggregates of crustal materials. Seven percent of the particles were organic and 3% were metallic, viz., iron, chromium, and nickel. High… more
Date: November 1, 1977
Creator: Sanders, S.M. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Calculation of particulate dispersion in a design-basis tornadic storm from the Babcock and Wilcox Plant, Leechburg, Pennsylvania

Description: A three-dimensional numerical model is used to calculate ground-level air concentration and deposition (due to precipitation scavenging) after a hypothetical tornado strike at the Babcock and Wilcox Plutonium Fabrication Facility at Leechburg, Pennsylvania. Plutonium particles lss than 20 ..mu..m in diameter are assumed to be lifted into the tornadic storm cell by the vortex. The rotational characteristics of the tornadic storm are embedded within the larger mesoscale flow of the storm system. … more
Date: March 1, 1978
Creator: Pepper, D.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design of a particulate-monitoring network for the Y-12 plant

Description: An Air Quality Monitoring Network Design (AQMND) with multiple objectives is being developed for the Y-12 Plant production facilities. The objectives are: Y-12 facility surveillance; monitoring the transport of Y-12 generated airborne effluents towards either the Oak Ridge National Laboratory or the developed region of the City of Oak Ridge; and monitoring population exposure in residential areas close to the Y-12 Plant. A two step design process was carried out, using the Air Quality Monitor N… more
Date: January 1, 1982
Creator: Hougland, E. S.; Oakes, T. W. & Underwood, J. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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LOA-1: prevent accidents. Quarterly technical progress report, FRSP program - July through September 1981. [LMFBR]

Description: Information related to LMFBR reactor safety is presented concerning common cause failures; shutdown by self-activated system; shutdown heat removal system operation; sodium burning; core catcher material interactions; accident release of sodium oxide aerosol; and LMFBR risk assessment.
Date: January 1, 1981
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Particle size distribution of airborne plutonium near a chemical separations facility

Description: Particulate matter containing Pu-238 and Pu-239,240 emitted from a stack at the Savannah River Plant was collected and fractionated by size with cascade impactors. Two impactor measurements were made at a distance of 200 meters from the H-Area stack and a third was at a distance of 420 meters. Annual collections were made for three years. The Pu-238 and Pu 239,240 concentrations were determined for each of the size fractions. The fractions collected at 200 m from the 62 m stack showed a biphasi… more
Date: December 1, 1981
Creator: Gay, D. D. & Watts, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Toxicity of Inhaled Particles of Sup 238 PuO2 in Dogs

Description: This study was conducted to determine the toxicity of inhaled {sup 238}PuO{sub 2} in the dog. Inhalation was selected because it is the mostly likely route of human exposure in the event of an accidental airborne release. Of 166 dog in the study, 72 inhaled 1.5{mu}m and 72 inhaled 3.0 {mu}m activity median aerodynamic diameter particles of {sup 238}PuO{sub 2}. Another 24 dogs inhaled the aerosol vector without plutonium. The aerosol exposures resulted in initial pulmonary burdens ranging from 3… more
Date: January 1, 1991
Creator: Muggenburg, B. A.; Guilmette, R. A.; Griffith, W. C., (Jr.); Hahn, F. F.; Boecker, B. B. & Gillett, N. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Numerical simulation of self-induced rainout using a dynamic convective cloud model

Description: The hypothesis that self-induced rainout can occur is supported by observations in Hiroshima and Nagasaki, where deposition of weapons debris with precipitation occurred several km downwind of the burst point. This precipitation was initiated either directly by the nuclear weapons or by the ensuing fires. Simulation of the Nagasaki event with a convection cloud precipitation scavenging model, although fraught with many questionable assumptions, agrees surprisingly well with the observations and… more
Date: March 1, 1980
Creator: Molenkamp, C.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Formation and characterization of fission-product aerosols under postulated HTGR accident conditions

Description: The paper presents the results of an experimental investigation on the formation mechanism and physical characterization of simulated nuclear aerosols that could likely be released during an HTGR core heat-up accident. Experiments were carried out in a high-temperature flow system consisting essentially of an inductively heated release source, a vapor deposition tube, and a filter assembly for collecting particulate matter. Simulated fission products Sr and Ba as oxides are separately impregnat… more
Date: July 1, 1982
Creator: Tang, I.N. & Munkelwitz, H.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Considerations in the behavior of aerosols in gloveboxes. I. Models. [Pu aerosols]

Description: Increasing requirements for minimizing aerosol release from gloveboxes and minimizing personnel irradiation in the processing and recycling of reactor grade plutonium necessitate a knowledge of the behavior of aerosols in such enclosures. This paper presents the results of a literature survey concerning aerosols in gloveboxes. The results of some theoretical plutonium aerosol models in simulating glovebox conditions are reported.
Date: March 1, 1977
Creator: Mitchell, D.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Index to the AEC/ERDA/DOE Air Cleaning Conferences

Description: A comprehensive index to the papers in the second through sixteenth AEC/ERDA/DOE Nuclear Air Cleaning Conference is discussed. The index will be published in early 1981 and will be designated as Volume 3 of the proceeding of the sixteenth conference. The index has three parts, a straight numeric tabulation, an author index, and a key word in context (KWIC) index. (JGB)
Date: January 1, 1980
Creator: Burchsted, C.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Results from simulated upper-plenum aerosol transport and aerosol resuspension experiments

Description: Recent calculational results published as part of the Battelle-Columbus BMI-2104 source term study indicate that, for some LWR accident sequences, aerosol deposition in the reactor primary coolant system (PCS) can lead to significant reductions in the radionuclide source term. Aerosol transport and deposition in the PCS have been calculated in this study using the TRAP-MELT 2 computer code, which was developed at Battelle-Columbus; the status of validation of the TRAP-MELT 2 code has been descr… more
Date: January 1, 1984
Creator: Wright, A.L. & Pattison, W.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Deposition of air-borne /sup 238/Pu near a chemical separation facility

Description: Three methods were compared to measure deposition of /sup 238/Pu released from a chemical separation facility at the Savannah River Plant, Aiken, SC. The following methods were used: adhesive paper; a collector of rain and dryfall; and soil samples. Excellent agreement among the three methods was found. The measured deposition for the particular source term and meteorological conditions at the Savannah River Plant is described by y proportional to x/sup -1.36/ where y is the pCi of /sup 238/Pu … more
Date: January 1, 1982
Creator: Horton, J.H. & Gay, D.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Summary of aerosol code-comparison results for LWR (Light-Water Reactor) aerosol containment tests LA1, LA2, and LA3: (Final report)

Description: The Light-Water Reactor (LWR) Aerosol Containment Experiments (LACE) are being performed in Richland, Washington, at the Hanford Engineering Development Laboratory (HEDL) under the leadershiop of an international project board and the Electric Power Research Institute. These tests have two objectives: to investigate, at large scale, the inherent aerosol retention behavior in LWR containments under simulated severe accident conditions, and to provide an experimental data base for validating aero… more
Date: January 1, 1986
Creator: Wright, A. L.; Wilson, J. H. & Arwood, P. C.
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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