Nuclear power plant double-layer containment equipment sealed cabin and opening and closing method thereof

Abstract

The invention provides a nuclear power plant double-layer containment equipment sealed cabin and an opening and closing method thereof. A double-layer containment comprises an outer containment and aninner containment, the inner containment and the outer containment are correspondingly provided with an inner penetration piece and an outer penetration piece, respectively, and the inner penetrationpiece and the outer penetration piece are in flexible sealed connection; the sealed cabin further comprises a first door body assembly, a second door body assembly and a floor assembly; the first door body assembly is detachably connected with the inner penetration piece and used for establishing a pressure-bearing sealing barrier on the boundary of the inner containment; the second door body assembly is movably arranged on the outer containment and used for establishing a shielding sealing barrier on the boundary of the outer containment; the inner penetration piece, the outer penetration piece, the first door body assembly and the second door body assembly jointly form a sealed space through surrounding; and the floor assembly is arranged in the sealed space in a turnover and telescopicmode and used for equipment transportation and passing in the working state. The sealed cabin provided by the invention realizes sealing performance and continuity of access channels of double-layercontainment equipment, and ensures that radioactive substances in a nuclear power plant cannot be leaked to the natural environment.

Description

technical field [0001] The technical invention relates to the field of nuclear power plant equipment, in particular to a sealed compartment of nuclear power plant double-layer containment equipment and an opening and closing method thereof. Background technique [0002] The containment of nuclear power plants is provided with passages for the entry and exit of large equipment. This passage is composed of embedded penetration parts welded with the containment and the passage floor, and the opening and closing of the passage is realized by the equipment gates. Press to seal the barrier. [0003] The existing nuclear power plant has a double-layer containment structure. The double-layer containment structure caused the original pre-embedded penetration to be divided into two parts, the inner and outer parts, and the middle was disconnected, which brought about the sealing and traffic problems of the equipment access. The existing equipment gate sealing system can no longer mee...

AI Technical Summary

Problems solved by technology

[0003] The existing nuclear power plant has a double-layer containment structure. The double-layer containment structure caused the original embedded penetration parts to be divided into two parts, the inside and the outside, and the middle was disconnected, which brought about the sealing and traffic problems of the equipment access channels.

The existing equipment gate sealing system can no longer meet the sealing leakage rate requirements under severe accident conditions

[0004] Therefore, there is an urgent need to find a double-layer containment equipment airtight cabin and its opening and closing method to solve the problem of sealing and continuity of the access passage

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