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Title: Performance of multihundred-watt fueled-sphere assemblies in the safety verification test

Abstract

Seven fueled-sphere assemblies equivalent to those proposed for use in multihundred-watt thermoelectric generators were subjected to conditions that simulated the sequential environments produced by an orbital abort and earth impact. The procedures were similar to those in the Safety Sequential Test, and the assemblies differed only in minor dimensional and power level changes. All assemblies met the specifications for flight quality units. Visual examination indicated that all the iridium shells had lost their containment capability; however, rupturing of two shells was not confirmed. Five were obviously ruptured, and the fuel in three was exposed. All iridium fractures were essentially intergranular. A large grain size may have promoted this type of failure. Half of the vent assemblies failed to pass helium at ambient temperature after the test. Failure was because of nonmetallic materials in the vent frits. Release of plutonia per unit area of cracks in a containment shell ruptured by simulated earth impact was determined.

Authors:
Publication Date:
Research Org.:
Los Alamos Scientific Lab., N.Mex. (USA)
OSTI Identifier:
4839880
Report Number(s):
LA-6082
NSA Number:
NSA-33-023442
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 30-JUN-76
Country of Publication:
United States
Language:
English
Subject:
N47200* -Isotope & Radiation Source Technology-Isotopic Power Sources; 070300* -Isotope & Radiation Source Technology-Isotopic Power Supplies; *RADIOISOTOPE HEAT SOURCES- IMPACT TESTS; *THERMOELECTRIC GENERATORS- - RADIOISOTOPE HEAT SOURCES; PLUTONIUM 238; PLUTONIUM DIOXIDE; POWER SUPPLIES; REENTRY; SAFETY; SPACE VEHICLES; NESDPS Office of Nuclear Energy Space and Defense Power Systems

Citation Formats

Cramer, E M. Performance of multihundred-watt fueled-sphere assemblies in the safety verification test. United States: N. p., 1975. Web. doi:10.2172/4839880.
Cramer, E M. Performance of multihundred-watt fueled-sphere assemblies in the safety verification test. United States. https://doi.org/10.2172/4839880
Cramer, E M. Mon . "Performance of multihundred-watt fueled-sphere assemblies in the safety verification test". United States. https://doi.org/10.2172/4839880. https://www.osti.gov/servlets/purl/4839880.
@article{osti_4839880,
title = {Performance of multihundred-watt fueled-sphere assemblies in the safety verification test},
author = {Cramer, E M},
abstractNote = {Seven fueled-sphere assemblies equivalent to those proposed for use in multihundred-watt thermoelectric generators were subjected to conditions that simulated the sequential environments produced by an orbital abort and earth impact. The procedures were similar to those in the Safety Sequential Test, and the assemblies differed only in minor dimensional and power level changes. All assemblies met the specifications for flight quality units. Visual examination indicated that all the iridium shells had lost their containment capability; however, rupturing of two shells was not confirmed. Five were obviously ruptured, and the fuel in three was exposed. All iridium fractures were essentially intergranular. A large grain size may have promoted this type of failure. Half of the vent assemblies failed to pass helium at ambient temperature after the test. Failure was because of nonmetallic materials in the vent frits. Release of plutonia per unit area of cracks in a containment shell ruptured by simulated earth impact was determined.},
doi = {10.2172/4839880},
url = {https://www.osti.gov/biblio/4839880}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1975},
month = {9}
}