Alteration of reactor installation (alteration of No.3 reactor facilities) in Fukushima No.2 Nuclear Power Station, Tokyo Electric Power Co., Inc. (Report)

The Nuclear Safety Commission received the report on December 15, 1989 from the Committee on Examination of Nuclear Reactor Safety on this alteration, about which the instruction to the Committee had been made on November 9, 1989, and after the deliberation, it presented the report to the Minister of International Trade and Industry. It was recognized as the result of examination that the technical capability of the applicant is appropriate. It was judged as the results of investigation and deliberation that the safety after this alteration of reactor installation can be ensured. The content of this alteration of installation is, at the time of third fuel replacement, to use the replacement fuel, of which the average enrichment degree is lowered to about 2.2 mt.%, in addition to the conventional replacement fuel of 3.0 wt.% enrichment because it is necessary to charge more new fuel than usual case. The mechanical design and the nuclear design of the replacement fuel were examined, and it was confirmed that the safety design is appropriate. (K.I.)