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in subjects: "Nesdps Office Of Nuclear Energy Space And Defense Power Systems"  
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Failure experience in refractory alloy-clad fuel pins applicable to space nuclear power

Description: Numerous in-reactor tests were conducted in the 1960's and early 1970's to develop fuel elements for space nuclear reactors. Most of the tests emphasized refractory metal-clad UN, UC, and UO/sub 2/. Previous reviews were provided by Weaver and Scott and by Gluyas and Watson. More recently, these data were reviewed for supporting information concerning the technical feasibility issues as they relate to the current reactor designs. This paper will focus on the fuel pin failure experience to obtai… more
Date: May 1, 1984
Creator: Dutt, D.S. & Cox, C.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental investigations of /sup 238/Pu behavior in soil columns

Description: Two series of experiments were conducted to study the transport of plutonium through soils. The first series involved deposition of small quantities (2.0 to 3.5 mg) of particulate /sup 238/Pu oxide on soil columns containing silt loam soil. When deionized water was allowed to percolate through the columns, plutonium was released into the drainage at the rate of 8 to 15 pg/day. During the 6.8-y experiment, the total amount of plutonium released into the soil drainage amounted to less than 0.01% … more
Date: May 1, 1984
Creator: Nelson, G. B.; Herrera, B.; Stalnaker, N. D.; Coffelt, K. P.; Patterson, J. H.; Heaton, R. C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Helium release from radioisotope heat sources

Description: Diffusion of helium in /sup 238/PuO/sub 2/ fuel was characterized as a function of the heating rate and the fuel microstructure. The samples were thermally ramped in an induction furnace and the helium release rates measured with an automated mass spectrometer. The diffusion constants and activation energies were obtained from the data using a simple diffusion model. The release rates of helium were correlated with the fuel microstructure by metallographic examination of fuel samples. The relea… more
Date: May 1, 1984
Creator: Peterson, D.E.; Early, J.W.; Starzynski, J.S. & Land, C.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reentry analysis

Description: This paper presents the criteria, previous nuclear experience in space, analysis techniques, and possible breakup enhancement devices applicable to an acceptable SP-100 reentry from space. Reactor operation in nuclear-safe orbit will minimize the radiological risk; the remaining safeguards criteria need to be defined. A simple analytical point mass reentry technique and a more comprehensive analysis method that considers vehicle dynamics and orbit insertion malfunctions are presented. Vehicle t… more
Date: May 1, 1984
Creator: Biehl, F.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Beneficial uses of /sup 241/Am

Description: This report assesses the uses of /sup 241/Am and the associated costs and supply. The study shows that /sup 241/Am-fueled radioisotope thermoelectric generators in the range of 1 to 5 W electrical provide the most promising use of kilogram amounts of this isotope. For medical uses, where purity is essential, irradiation of /sup 241/Am can produce 97% pure /sup 238/Pu at $21,000/g. Using a pyro-metallurgical process, /sup 241/Am could be recovered from molten salt extraction (MSE) residues at an… more
Date: May 1, 1984
Creator: Mangeng, C.A. & Thayer, G.R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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