Operating experience of Shimane Nuclear Power Station and core management engineering systems

The Shimane Nuclear Power Station of Chugoku Electric Power Company went into commercial operation on March 29, 1974 as the first Japanese-made commercial nuclear power plant. After scheduled operation, the plant was shut down on February 16, 1975 for the first annual maintenance and inspection outage. The plant capacity factor of 1974 fiscal year has been as high as 75.6% and fuel has maintained integrity for more than a year and a half since start-up. Described is the core management engineering system applied to the operating strategy for mitigating thermal duty of the fuel and to core management engineering including control rod pattern required for operation of the nuclear reactor. (auth.)