Cladding corrosion and hydriding in irradiated defected zircaloy fuel rods (LWBR Development Program)

Technical Report · Thu Aug 01 00:00:00 EDT 1985

DOI:https://doi.org/10.2172/5417409· OSTI ID:5417409

Clayton, J C

Twenty-one LWBR irradiation test rods containing ThO/sub 2/-UO/sub 2/ fuel and Zircaloy cladding with holes or cracks operated successfully. Zircaloy cladding corrosion on the inside and outside diameter surfaces and hydrogen pickup in the cladding were measured. The observed outer surface Zircaloy cladding corrosion oxide thicknesses of the test rods were similar to thicknesses measured for nondefected irradiation test rods. An analysis model, which was developed to calculate outer surface oxide thickness of non-defected rods, gave results which were in reasonable agreement with the outer surface oxide thicknesses of defected rods. When the analysis procedure was modified to account for additional corrosion proportional to fission rate and to time, the calculated values agreed well with measured inner oxide corrosion film values. Hydrogen pickup in the defected rods was not directly proportional to local corrosion oxide weight gain as was the case for non-defected rods. 16 refs., 6 figs., 8 tabs.

• Research Organization: Bettis Atomic Power Lab. (BAPL), West Mifflin, PA (United States)
• DOE Contract Number: AC11-76PN00014
• OSTI ID: 5417409
• Report Number(s): WAPD-TM-1393; ON: DE85017355
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
36 MATERIALS SCIENCE
FUEL CANS
CORROSION
HYDRIDATION
LWBR TYPE REACTORS
REACTOR MATERIALS
ZIRCALOY 4
COMPUTERIZED SIMULATION
DEFECTS
POST-IRRADIATION EXAMINATION
THORIUM OXIDES
URANIUM DIOXIDE
ACTINIDE COMPOUNDS
ALLOYS
BREEDER REACTORS
CHALCOGENIDES
CHEMICAL REACTIONS
MATERIALS
OXIDES
OXYGEN COMPOUNDS
REACTORS
SIMULATION
THERMAL REACTORS
THORIUM COMPOUNDS
TIN ALLOYS
URANIUM COMPOUNDS
URANIUM OXIDES
WATER COOLED REACTORS
WATER MODERATED REACTORS
ZIRCALOY
ZIRCONIUM ALLOYS
ZIRCONIUM BASE ALLOYS
220900* - Nuclear Reactor Technology- Reactor Safety
210500 - Power Reactors
Breeding
360105 - Metals & Alloys- Corrosion & Erosion