Examination of stainless steel-clad Connecticut Yankee fuel assembly S004 after storage in borated water
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 National Lab. (PNNL), Richland, WA (United States)
- 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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DESIGN OF THE YANKEE CORE I FUEL ASSEMBLY
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CONNECTICUT YANKEE REACTOR
SPENT FUEL ELEMENTS
DESTRUCTIVE TESTING
NONDESTRUCTIVE TESTING
BURNUP
CORROSION
EDDY CURRENT TESTING
EXPERIMENTAL DATA
FISSION PRODUCTS
FUEL ASSEMBLIES
FUEL RODS
GAMMA FUEL SCANNING
INSPECTION
MECHANICAL TESTS
METALLOGRAPHY
MICROSTRUCTURE
SPENT FUEL STORAGE
STAINLESS STEEL-304
ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
DATA
ELECTROMAGNETIC TESTING
ENRICHED URANIUM REACTORS
FUEL ELEMENTS
FUEL SCANNING
GAMMA RADIOGRAPHY
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INDUSTRIAL RADIOGRAPHY
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
ISOTOPES
MATERIALS
MATERIALS TESTING
NICKEL ALLOYS
NUMERICAL DATA
POWER REACTORS
PWR TYPE REACTORS
RADIOACTIVE MATERIALS
REACTOR COMPONENTS
REACTORS
STAINLESS STEELS
STEELS
STORAGE
TESTING
THERMAL REACTORS
WATER COOLED REACTORS
WATER MODERATED REACTORS
210200* - Power Reactors
Nonbreeding
Light-Water Moderated
Nonboiling Water Cooled