Effects of stoichiometry on cladding reaction in mixed-oxide fuel

Conference · Sun Apr 01 04:00:00 EST 1979

OSTI ID:6075335

Lawrence, L. A.

Initial fuel stoichiometry (oxygen-to-metal ratio, O/M) has been established as one of the major parameters influencing the character and extent of fuel-cladding chemical interaction (FCCI) in UO/sub 2/--25 wt% PuO/sub 2/ fuels clad with 20% cold worked type 316 stainless steel. How the character of the interaction changes with initial O/M and the O/M dependence that has been established for the depth of interaction are discussed. the data base for this analysis consists of 134 data sets from P-23 series fuel pins irradiated in EBR-II. As-fabricated O/M's ranged from 1.938 to 1.984 with the bulk of the data in the range 1.96 to 1.98. Fuel pins operated to 9.5 atom %, with local cladding inner surface temperatures to 725/sup 0/C, for exposure times to 415 equivalent full power days at heat rates of approx. 400 W/cm.

• Research Organization: Hanford Engineering Development Lab., Richland, WA (USA)
• Sponsoring Organization: USDOE
• DOE Contract Number: EY-76-C-14-2170
• OSTI ID: 6075335
• Report Number(s): HEDL-SA-1749-FP; CONF-790602-75
• Country of Publication: United States
• Language: English

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