PRECRITICAL EXCORE DETECTOR SUBCHANNEL CALIBRATION METHOD OF NUCLEAR POWER PLANT

摘要

PURPOSE: A precritical excore detector subchannel calibration method of nuclear power plant is provided to improve a use ratio of a nuclear power plant by reducing a low-power running time. CONSTITUTION: A process for acquiring power station measurement data needed for excore detector calibration is omitted. A calibration coefficient is determined by the following equation which reflects an accuracy of previous period calibration to a current period after reflecting a ratio(KACL) of a previous-period reference output to an excore protection system output to a current-period calibration constant. Kj = ((a previous-period initial-period measuring machine signal/a current-period initial-period measuring machine signal))*KCAL(previous-period), (j=1,2,3).