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AN EVALUATION OF UO$sub 2$--STAINLESS STEEL CORE MATERIALS

Technical Report ·
OSTI ID:4812010
;
A study was made of the mechanical properties of UO/sub 2/stainless steel core material as a function of fabrication variables and density. It was determined that the best mechanical properties and high density can be obtained by utilizing -140 +323 mesh granulated UO/sub 2/ in a -325 mesh type 316 stainless steel matrix. A thorough study was made of the actual density of various types of stainless steel powders through calculated density measurements and measurements by pycnometer. The addition of 3 wt% CaF/sub 2/ to Geneva-type uranium oxide was investigated. The CaF/sub 2/ addition resulted in a very significant increase in core material density, so that it was equivalent to core material made with granulated oxide. Although the CaF/sub 2/ addition did not materially affect the mechanical properties at room temperature, the yield strength and ultimate tensile strength at 1600 deg F was significantly increased. The CaF/sub 2/ addition also improved the stress-rupture properties. The stress- rupture properties of core material containing the 302B stainless steel matrix were about the same as that having a 316 stainless steel matrix. Low density core material had the effect of lowering stress-rupture properties. The superiority in stress-rupture strength of -325 mesh UO/sub 2/ core material over the coarser sized -140 +325 mesh material was also observed. (auth)
Research Organization:
Sylvania-Corning Nuclear Corp., Bayside, N.Y.
NSA Number:
NSA-16-025762
OSTI ID:
4812010
Report Number(s):
SCNC-264
Country of Publication:
United States
Language:
English

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Related Subjects

CALCIUM FLUORIDES
DENSITY
ENRICHMENT
GRAIN SIZE
LABORATORY EQUIPMENT
MEASURED VALUES
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
NUMERICALS
OXIDES
PHASE DIAGRAMS
POWDERS
STAINLESS STEEL-302
STAINLESS STEEL-316
STAINLESS STEELS
TEMPERATURE
TENSILE PROPERTIES
URANIUM OXIDES
VARIATIONS