An emergency reactor vessel head support device and method for a reactor upper internals

Abstract

The application discloses a reactor upper in-core component emergency back-to-pile support device and method, relates to the technical field of maintenance operation of pressurized water reactor nuclear power plants, and aims to solve the problem that the upper in-core component cannot be directly hoisted back to the core when the underwater component of the fuel transfer system fails during the unloading or loading process of the existing device. The device comprises a temporary support ring as the main body of the device, the temporary support ring is an integral ring structure, a plurality of uniformly distributed circular through holes are formed in the temporary support ring, a plurality of positioning grooves and a plurality of lifting lug holes are arranged at the outer edge of the temporary support ring, a plurality of spin lock grooves are formed in the upper surface of the temporary support ring, and a guide sleeve is detachably connected to the temporary support ring. The device can hoist the upper in-core component back to the core in the case that the underwater component of the fuel transfer system fails during the unloading or loading process, and the upper in-core component is raised on the temporary support ring, so that the low-span of the refueling pool can be independently drained, and the maintenance of the underwater component of the fuel transfer system on the reactor plant side can be implemented.

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