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Title: Thermal shock analysis of ceramic multihundred watt spheres

Abstract

The thermal fracture resistance of plutonia Multihundred Watt (MHW) fuel spheres was analyzed assuming boundary conditions of (1) constant heating or cooling rate for the sphere surface, (2) heating or cooling with a constant surface heat transfer coefficient at the sphere surface, and (3) heating or cooling the sphere surface solely by radiation. Thermal damage resistance (mechanical weakening) of MHW spheres was analyzed in terms of the fracture energy and crack system present in the fuel. Using available property data for porous PuO/sub 2/ between 400 and 1200 deg C, and estimating other properties from available data for UO/sub 2/ and ThO/sub 2/ the thermal shock conditions that cause fracture of the fuel sphere were estimated. Experimental values for the tensile fracture strength and the elastic modulus of the fuel as functions of temperature are presently not available and estimates were made of these properties. (auth)

Authors:
Publication Date:
Research Org.:
Mound Lab., Miamisburg, Ohio (USA)
Sponsoring Org.:
USDOE
OSTI Identifier:
4312654
Report Number(s):
MLM-2104
NSA Number:
NSA-29-029635
DOE Contract Number:  
AT-33-1-GEN-53
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 30-JUN-74
Country of Publication:
United States
Language:
English
Subject:
N47200* -Isotope & Radiation Source Technology-Isotopic Power Sources; *PLUTONIUM 238- RADIOISOTOPE HEAT SOURCES; *PLUTONIUM OXIDES- THERMAL SHOCK; *RADIOISOTOPE BATTERIES- RADIOISOTOPE HEAT SOURCES; *RADIOISOTOPE HEAT SOURCES- THERMAL SHOCK; FRACTURE PROPERTIES; HIGH TEMPERATURE; VERY HIGH TEMPERATURE; NESDPS Office of Nuclear Energy Space and Defense Power Systems

Citation Formats

Tennery, V J. Thermal shock analysis of ceramic multihundred watt spheres. United States: N. p., 1974. Web. doi:10.2172/4312654.
Tennery, V J. Thermal shock analysis of ceramic multihundred watt spheres. United States. https://doi.org/10.2172/4312654
Tennery, V J. Mon . "Thermal shock analysis of ceramic multihundred watt spheres". United States. https://doi.org/10.2172/4312654. https://www.osti.gov/servlets/purl/4312654.
@article{osti_4312654,
title = {Thermal shock analysis of ceramic multihundred watt spheres},
author = {Tennery, V J},
abstractNote = {The thermal fracture resistance of plutonia Multihundred Watt (MHW) fuel spheres was analyzed assuming boundary conditions of (1) constant heating or cooling rate for the sphere surface, (2) heating or cooling with a constant surface heat transfer coefficient at the sphere surface, and (3) heating or cooling the sphere surface solely by radiation. Thermal damage resistance (mechanical weakening) of MHW spheres was analyzed in terms of the fracture energy and crack system present in the fuel. Using available property data for porous PuO/sub 2/ between 400 and 1200 deg C, and estimating other properties from available data for UO/sub 2/ and ThO/sub 2/ the thermal shock conditions that cause fracture of the fuel sphere were estimated. Experimental values for the tensile fracture strength and the elastic modulus of the fuel as functions of temperature are presently not available and estimates were made of these properties. (auth)},
doi = {10.2172/4312654},
url = {https://www.osti.gov/biblio/4312654}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1974},
month = {3}
}