Examination of stainless steel-clad Connecticut Yankee fuel assembly S004 after storage in borated water

Technical Report · Wed Sep 01 04:00:00 EDT 1982

DOI:https://doi.org/10.2172/6793529· OSTI ID:6793529

Langstaff, D C; Bailey, W J; Johnson, Jr, A B; Landow, M P; Pasupathi, V; Klingensmith, R W

A Connecticut Yankee fuel assembly (S004) was tested nondestructively and destructively. It was concluded that no obvious degradation of the 304L stainless steel-clad spent fuel from assembly S004 occurred during 5 y of storage in borated water. Furthermore, no obvious degradation due to the pool environment occurred on 304 stainless steel-clad rods in assemblies H07 and G11, which were stored for shorter periods but contained operationally induced cladding defects. The seam welds in the cladding on fuel rods from assembly S004, H07, and G11 were similar in that they showed a wrought microstructure with grains noticeably smaller than those in the cladding base metal. The end cap welds showed a dendritically cored structure, typical of rapidly quenched austenitic weld metal. Some intergranular melting may have occurred in the heat-affected zone (HAZ) in the cladding adjacent to the end cap welds in rods from assemblies S004 and H07. However, the weld areas did not show evidence of corrosion-induced degradation.

• Research Organization: Pacific Northwest Lab., Richland, WA (USA)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 6793529
• Report Number(s): PNL-3828; ON: DE83000301
• Country of Publication: United States
• Language: English

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21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
210200* -- Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled
ALLOYS
BURNUP
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CONNECTICUT YANKEE REACTOR
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ELECTROMAGNETIC TESTING
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FUEL ASSEMBLIES
FUEL ELEMENTS
FUEL RODS
FUEL SCANNING
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GAMMA RADIOGRAPHY
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INDUSTRIAL RADIOGRAPHY
INFORMATION
INSPECTION
IRON ALLOYS
IRON BASE ALLOYS
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SPENT FUEL STORAGE
STAINLESS STEEL-304
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STEELS
STORAGE
TESTING
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS