SECURITY MONITORING EQUIPMENT IN NUCLEAR FUEL STORAGE FACILITY

摘要

PROBLEM TO BE SOLVED: To provide a monitoring system that enables visual observation of a pressure gauge, and also maintenance and calibration work at a place as distant as possible from a cask, so as to improve safety of work and reduce exposure.SOLUTION: The security monitoring equipment in a nuclear fuel storage facility includes: a cask 1 for nuclear fuel storage which has a space 14 between lids at an upper opening of a cask body 10 having a storage chamber 11 for housing nuclear fuel; and a pressure gauge 2 for measuring pressure of the space 14 between the lids. In the equipment, a primary valve 16 is provided near the space 14 between the lids and connected with the space 14 between the lids, a secondary valve 22 is provided near the pressure gauge 2 and connected with the pressure gauge 2, and a conduit 21 connecting the primary valve 16 and the secondary valve 22 is disposed so as to constitute a pressure introduction path 21 for introducing the pressure of the space 14 between the lids to the pressure gauge 2 provided at a place distant from the cask 1.