NUCLEAR REACTOR SAFETY PROTECTION DEVICE AND METHOD FOR DETERMINING ABNORMALITY OF SOLENOID OF SOLENOID VALVE

摘要

PROBLEM TO BE SOLVED: To determine abnormality of either one of a plurality of solenoids of solenoid valves by a simple configuration in a nuclear reactor safety protection device.SOLUTION: A nuclear reactor safety protection device 1 includes: a plurality of solenoids 6 of solenoid valves connected in parallel; a power supply 4 for supplying the solenoids 6 of the solenoid valves with power; an excitation contact 7 for cutting off the power by an opening operation; a current measuring section 15 for measuring a current flowing through the excitation contact 7 as a current measurement value 31; an excitation determining section 12 for determining that the plurality of solenoids 6 of the solenoid valves are excited by the fact that the current measurement value 31 exceeds an excitation determining threshold; and a solenoid abnormality determining section 13 for determining that, when the excitation determining section 12 determines that the plurality of solenoids 6 of the solenoid valves are excited and the solenoid abnormality determining threshold is less than the current measurement value 31, there is abnormality in one of the solenoids 6 of the solenoid valves.