防災機器の保護装置

Protection device of disaster preventing equipment

Abstract

PROBLEM TO BE SOLVED: To provide a protection device for disaster preventing equipment capable of surely operating without being influenced by radiation by doubly shielding the disaster preventing equipment installed in a high radiation district by shielding members. SOLUTION: The protection device for the disaster preventing equipment 5 installed in a high radiation district is provided with a 1st shielding member 10 arranged in the vicinity of the disaster preventing equipment 5 and capable of shielding the equipment 5 from γ rays and a 2nd shielding member 20 arranged in the vicinity of the 1st shielding member 10 and capable of shielding the equipment from neutron radiation. Since the disaster preventing equipment 5 is a smoke sensor, the 1st and 2nd shielding members 10, 20 are provided with smoke inflow opening parts 15, 23 and these opening parts 15, 23 are formed as shapes capable of blocking straight radiation. COPYRIGHT: (C)2004,JPO
【課題】高放射線区域に設置される防災機器を遮蔽部材で二重に遮蔽することにより、放射線の影響を受けることなく、確実に動作することのできる防災機器の保護装置を提供する。 【解決手段】高放射線区域に設置される防災機器5の保護装置であって、防災機器5の近くに設けられてγ線を遮蔽する第1の遮蔽部材10と、この第1の遮蔽部材10の近くに設けられて中性子線を遮蔽する第2の遮蔽部材20とを備えた。 また、防災機器5は煙感知器であって、第1の遮蔽部材10及び第2の遮蔽部材20には煙流入用の開口部15,23が設けられており、これら開口部15,23を放射線の直進を遮る形状に形成した。 【選択図】    図1

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    JP-2015004555-AJanuary 08, 2015日立Geニュークリア・エナジー株式会社, Hitachi-Ge Nuclear Energy LtdMethod of retrieving fuel debris from boiling water nuclear plant and work house system