Segmented material change pool water gate for nuclear power plant and assembly method thereof

Abstract

The invention relates to a segmented material change pool water gate for a nuclear power plant and an assembly method thereof. The segmented material change pool water gate for the nuclear power plantcomprises an upper section, a middle section and a lower section; connection sealing pads are arranged between two adjacent sections, and are connected through bolts and nuts; two lifting lugs are arranged at the top of the upper section; a bolt rope ring is arranged on the side surface of the upper section; two guide pins are arranged at the tops of the middle section and the lower section; holes are formed in the bottoms of the upper section and the middle section; holes in each section correspond to the guide pins on the adjacent sections; pressing bar modules are arranged on the side surfaces of the upper section, the middle section and the lower section; the pressing bar modules comprise multiple pressing bars; and inflation sealing modules are arranged between the adjacent pressingbars. The segmented material change pool water gate for the nuclear power plant solves the difficulty of accessing limit by the safety shell size, can realize the process demands of in-shell assemblyand out-shell storage of the material change pool water gate, and reduces excessive radiation risk of maintainers through excellent tightness.

Description

technical field [0001] The invention relates to a segmented refueling pool water gate for a nuclear power plant and an assembly method thereof. It belongs to the field of nuclear power technology. Background technique [0002] Segmented refueling pool water gate is a special equipment used during the outage and overhaul of AP / CAP1000 series nuclear power plants. The maintenance operation of the equipment has created conditions. Under operating conditions, the water gates need to be used to isolate both sides of the reactor pool, and the component storage pool for storing reactor internals and upper components maintains a high water level of about 19m to realize the radiation protection of activated radioactive reactor internals shielded, while the sump on the side of the pressure vessel can be drained to facilitate low-water maintenance operations. The good water tightness of the water gate of the refueling pool can reduce the risk of the maintenance personnel being expos...

AI Technical Summary

Problems solved by technology

When the water gate of the refueling pool is not installed and used, it is stored vertically in the compartment of the voltage stabilizer. There is a device for fixing the water gate on the top of the compartment of the voltage stabilizer. The water gate can only be transferred, tilted and stored in the containment building Installation and use cannot perfectly solve the problem of limited access to and exit from the containment size, and subsequent maintenance and replacement are very inconvenient

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