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A long term radiological risk model for plutonium-fueled and fission reactor space nuclear system

Description: This report describes the optimization of the RISK III mathematical model, which provides risk assessment for the use of a plutonium-fueled, fission reactor in space systems. The report discusses possible scenarios leading to radiation releases on the ground; distinctions are made for an intact reactor and a dispersed reactor. Also included are projected dose equivalents for various accident situations. 54 refs., 31 figs., 11 tabs. (TEM)
Date: January 1, 1987
Creator: Bartram, B.W. & Dougherty, D.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aging effects of US space nuclear systems in orbit

Description: This report presents information and data in support of a cost-benefit analysis being performed by Fair child Industries (FI) on the feasibility of retrieving existing US space nuclear systems in earth orbit by the Space Shuttle. This report evaluates, for US space nuclear systems presently in orbit, the radioisotopic inventory and external radiation field as a function of time, the effect of aging on fuel containment materials over the projected lifetime of the system, and the possible radioac… more
Date: May 14, 1982
Creator: Bartram, B. W.; Huang, R.; Tammara, S. R. & Thielke, N. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiological risk analysis of potential SP-100 space mission scenarios

Description: This report presents a radiological risk analysis of three representative space mission scenarios utilizing a fission reactor. The mission profiles considered are: a high-altitude mission, launched by a TITAN IV launch vehicle, boosted by chemical upper stages into its operational orbit, a interplanetary nuclear electric propulsion (NEP) mission, started directly from a shuttle parking orbit, a low-altitude mission, launched by the Shuttle and boosted by a chemical stage to its operational orbi… more
Date: August 19, 1988
Creator: Bartram, B. W. & Weitzberg, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A review of plutonium environmental data with a bibliography for use in risk assessments

Description: Plutonium fueled radioisotopic heat sources find space, terrestrial, and undersea applications to generate electrical power. Such systems under postulated accident conditions could release radioactivity into the environment resulting in risks to the general population in the form of radiological doses and associated health effects. The evaluation of the radiological impact of postulated scenarios involving releases of activity into the environment includes identification of postulated accident … more
Date: June 15, 1983
Creator: Bartram, B.W. & Wilkinson, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of Transferred-Arc Cleaning for Thin Film Removal

Description: Transferred-arc cleaning is being investigated as a precision cleaning method for thin films on electrically conducting substrates as well as the traditional cleaning and roughening pretreatment for LPPS. Transferred-arc cleaning of copper substrates has been studied to identify the effect of processing conditions on cleaning and roughening characteristics. A Box-Behnken response surface design experiment varying the chamber pressure, substrate standoff distance, and torch current while observi… more
Date: March 17, 1998
Creator: Hollis, K.; Castro, R. G. & Bartram, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Plasma-sprayed ceramic coatings for protection against molten metal.

Description: Molten metal environments pose a special demand on materials due to the high temperature corrosion effects and thermal expansion mismatch induced stress effects. A solution that has been successfully employed is the use of a base material for the mechanical strength and a coating material for the chemical compatibility with the molten metal. The work described here used such an approach coating tungsten rods with aluminum oxide, yttria-stabilized zirconia, yttrium oxide, and erbium oxide deposi… more
Date: January 1, 2002
Creator: Hollis, K. J. (Kendall J.); Peters, M. I. (Maria I.) & Bartram, B. D. (Brian D.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Plasma-sprayed ceramic coatings for molten metal environments.

Description: Coating porosity is an important parameter to optimize for plasma-sprayed ceramics which are intended for service in molten metal environments. Too much porosity and the coatings may be infiltrated by the molten metal causing corrosive attack of the substrate or destruction of the coating upon solidification of the metal. Too little porosity and the coating may fail due to its inability to absorb thermal strains. This study describes the testing and analysis of tungsten rods coated with aluminu… more
Date: January 1, 2002
Creator: Hollis, K. J. (Kendall J.); Peters, M. I. (Maria I.) & Bartram, B. D. (Brian D.)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Dirac Experiments - Results and Challenges

Description: The 1997 international Dirac II Series held at Los Alamos National Laboratory involved low temperature electrical transport and optical experiments in magnetic fields exceeding 800%, produced by explosive flux compression using Russian MC-1 generators. An overview of the scientific and technical advances achieved in this Series is given, together with a strategy for future work in this challenging experimental environment. A significant outcome was achieved in transport studies of microfabricat… more
Date: October 24, 1998
Creator: Clark, R. G.; O'Brien, J. L.; Dzurak, A. S.; Kane, B. E.; Lumpkin, N. E.; Reilley, D. J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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