Mk22 out-of-specification fractional fuel tube ratios and indeterminate fuel and target tubes

Technical Report · Wed Dec 28 00:00:00 EST 1988

OSTI ID:5780079

Lambert, D P

Fractional Fuel Tube Ratio is defined as the ratio of grams {sup 235}U/ft in each outer fuel tube to the total g {sup 235}U/ft in each assembly. The ratios for the affected assemblies range from 0.518 to 0.520 with the minimum allowable specified as 0.521. Eight out-of-specification assemblies and 95 indeterminate assemblies were discovered in the P-11, K-14, and L-4 MK22 reactor charges. The eight out-of-spec assemblies in the P-11 charge did not meet the specification set forth in RTM-4432, Mark 22 Charge Specifications, Revision 6. The indeterminate assemblies either did not have a process history record to confirm the target or fuel content on the matchlist, or the process history record did not agree with the matchlist values. Twenty-five assemblies (8 out-of-spec and 17 indeterminate) in the P-11 cycle were charged to the reactor between 9/9/88 and 9/11/88. The indeterminate assemblies in the K-14 and L-4 reactor charges were discovered after shipment but before being charged to K or L Reactors. The out-of-specification assemblies will be irradiated with appropriate operating limits and the indeterminate target and fuel tubes will be replaced prior to reactor startup.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 5780079
• Report Number(s): RER-P-1853; RER-K-2228; RER-L-789; ON: DE92009896
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
FUEL ASSEMBLIES
SPECIFICATIONS
COMPLIANCE
K REACTOR
L REACTOR
P REACTOR
REACTOR SAFETY
URANIUM 235
ACTINIDE ISO
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
EVEN-ODD NUCLEI
HEAVY NUCLEI
HEAVY WATER MODERATED REACTORS
INTERNAL CONVERSION RADIOISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEI
PRODUCTION REACTORS
RADIOISOTOPES
REACTORS
SAFETY
SPECIAL PRODUCTION REACTORS
SPONTANEOUS FISSION RADIOISOTOPES
URANIUM ISOTOPES
220900* - Nuclear Reactor Technology- Reactor Safety
220600 - Nuclear Reactor Technology- Research
Test & Experimental Reactors