FIXED TYPE INSTRUMENTATION SYSTEM IN NUCLEAR REACTOR

摘要

PROBLEM TO BE SOLVED: To provide a fixed type instrumentation system in nuclear reactor using a gamma ray detector causing no extension of plant starting time. SOLUTION: The number of heater controllers 13 heating a plurality of fixed type gamma ray detectors 4a to 4k and sequentially heating heaters 44 one by one is determined as a number so that all calibrations of the gamma ray detectors are finished while reactor power is constant at starting of a nuclear reactor.