METHOD OF DECONTAMINATING AND DELIVERING STEAM TURBINE FOR BOILING WATER REACTOR NUCLEAR POWER PLANT AND DECONTAMINATION AND DELIVERY APPARATUS THEREFOR

PROBLEM TO BE SOLVED: To provide a method of decontaminating and delivering a BWR steam turbine and a decontamination and delivery apparatus therefor, capable of reducing replacement time of the BWR steam turbine.SOLUTION: A method of decontaminating and delivering a steam turbine for a boiling wate...

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Hauptverfasser: YOSHIDA YOSUKE, OBARA FUMIO, OZAKI YUKIYASU, ABE TORU, SUGIURA MASAHITO, ASAI KIWAMU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a method of decontaminating and delivering a BWR steam turbine and a decontamination and delivery apparatus therefor, capable of reducing replacement time of the BWR steam turbine.SOLUTION: A method of decontaminating and delivering a steam turbine for a boiling water reactor nuclear power plant comprises the steps of: storing devices of the steam turbine to be replaced in a storage device 20A and conducting a radiation dose survey on an outer surface of the storage device 20A; after confirming that the radiation dose survey shows no problem with delivery, delivering the devices of the steam turbine from a building where a replacement target steam turbine is installed to a predetermined radiation controlled area different from another radiation controlled area to which the building belongs; and after this delivering step, decontaminating the devices stored in the storage device 20A in the radiation controlled area to which the devices are delivered. 【課題】BWR用蒸気タービンの取替時間を短縮可能なBWR用蒸気タービンの除染および搬出方法、並びにその除染および搬出装置を提供する。【解決手段】沸騰水型原子力発電プラントにおける蒸気タービンの取替作業において、交換される蒸気タービンの機器を収納装置20Aに収納し、当該収納装置の外表面を放射線量サーベイするステップと、前記放射線量サーベイによって搬出に問題がないことを確認した後、前記交換される蒸気タービンが据え付けられていた建屋から当該建屋が属する放射線管理区域とは異なる所内の放射線管理区域へ搬出するステップと、この搬出するステップの後、搬出先の放射線管理区域内で前記収納装置に収納される機器を除染するステップと、を備える。【選択図】 図2