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A platform for research: civil engineering, architecture and urbanism
METHOD FOR DECOMMISSIONING NUCLEAR REACTOR
To provide a method for decommissioning a nuclear reactor which can surely shield radiation for a long time while avoiding influence of change of severe environments and also is advantageous for reducing the burden of monitoring and maintenance.SOLUTION: A caisson body 10 for containing a nuclear reactor building 22 and a supporting foundation 24 is formed. A caisson shovel 20 digs the foundation in the lower part of the caisson body 10 so that weight of the nuclear reactor building 22, the supporting foundation 24, and the caisson body 10 makes the caisson body 10 sink. When the caisson body 10 is sunk, a space 28 in the lower part of the caisson body 10 and the inside of the caisson body 10 are filled with concrete C. After that, the nuclear reactor building 22, the supporting foundation 24, and the caisson body 10 are buried in the ground and the decommissioning work is finished.SELECTED DRAWING: Figure 10
【課題】過酷な環境の変化の影響を回避しつつ長期間にわたって放射線を確実に遮蔽でき、監視作業およびメンテナンス作業の負担の軽減化を図る上で有利な原子炉の廃炉方法を提供すること。【解決手段】原子炉建屋２２と支持地盤２４とを収容するケーソン躯体１０を構築する。ケーソンショベル２０でケーソン躯体１０の下方の地盤を掘削していくことにより、原子炉建屋２２と支持地盤２４とケーソン躯体１０の重量によりケーソン躯体１０を沈下させていく。ケーソン躯体１０を沈下させたならば、ケーソン躯体１０の下方の空間２８と、ケーソン躯体１０の内部にコンクリートＣを充填し、原子炉建屋２２と支持地盤２４とをケーソン躯体１０と共に地中に埋設して廃炉作業を終了する。【選択図】図１０
METHOD FOR DECOMMISSIONING NUCLEAR REACTOR
To provide a method for decommissioning a nuclear reactor which can surely shield radiation for a long time while avoiding influence of change of severe environments and also is advantageous for reducing the burden of monitoring and maintenance.SOLUTION: A caisson body 10 for containing a nuclear reactor building 22 and a supporting foundation 24 is formed. A caisson shovel 20 digs the foundation in the lower part of the caisson body 10 so that weight of the nuclear reactor building 22, the supporting foundation 24, and the caisson body 10 makes the caisson body 10 sink. When the caisson body 10 is sunk, a space 28 in the lower part of the caisson body 10 and the inside of the caisson body 10 are filled with concrete C. After that, the nuclear reactor building 22, the supporting foundation 24, and the caisson body 10 are buried in the ground and the decommissioning work is finished.SELECTED DRAWING: Figure 10
【課題】過酷な環境の変化の影響を回避しつつ長期間にわたって放射線を確実に遮蔽でき、監視作業およびメンテナンス作業の負担の軽減化を図る上で有利な原子炉の廃炉方法を提供すること。【解決手段】原子炉建屋２２と支持地盤２４とを収容するケーソン躯体１０を構築する。ケーソンショベル２０でケーソン躯体１０の下方の地盤を掘削していくことにより、原子炉建屋２２と支持地盤２４とケーソン躯体１０の重量によりケーソン躯体１０を沈下させていく。ケーソン躯体１０を沈下させたならば、ケーソン躯体１０の下方の空間２８と、ケーソン躯体１０の内部にコンクリートＣを充填し、原子炉建屋２２と支持地盤２４とをケーソン躯体１０と共に地中に埋設して廃炉作業を終了する。【選択図】図１０
METHOD FOR DECOMMISSIONING NUCLEAR REACTOR
原子炉の廃炉方法
OKANO RIKIZO (author) / SHIBUYA MITSUO (author)
2023-04-06
Patent
Electronic Resource
Japanese