Underwater switching device realizing light and heavy assembly load simulation integration of refueling machine of nuclear power plant

Abstract

The invention applies to debugging and regular tests of a refueling machine of a nuclear power plant, particularly relates to an underwater switching machine realizing light and heavy assembly load simulation integration of the refueling machine of the nuclear power plant and aims to solve the problem that the light and heavy assembly load modes cannot be switched by a conventional device underwater. The underwater switching device is characterized by comprising a bottom plate, a supporting frame, a basic weight module, an underload counterweight compensation module, an overload counterweight compensation module, a lifting rod, a grabbing module, a top plate, lifting lugs, an overload counterweight compensation module support ring, an underload counterweight compensation module support ring, a basic weight module support ring, a heavy assembly compensation module and a lifting plate. With the adoption of the underwater switching device, load difference values under two modes including a light fuel assembly and a heavy fuel assembly can be compensated, switching can be finished underwater, integrated design of load, overload and underload test devices for the refueling machine is realized, and device structure change or accessory increase or decrease is not needed in a test process; besides, the underwater switching device adopts stainless steel machining and has low probability of being corroded by a boric acid solution.

Description

technical field [0001] The invention is applied to the commissioning and periodic test of a loading and unloading machine of a nuclear power plant, and in particular relates to an underwater switching device integrating load simulation of light and heavy components of a loading and unloading machine of a nuclear power plant. Background technique [0002] The pressurized water reactor nuclear power plant uses the heat released by the controlled self-sustaining chain fission reaction of nuclear fuel to generate electricity. As the fission reaction continues, the enrichment of the fuel components loaded in the reactor core is gradually reduced. Therefore, in a certain operating cycle After that, the fuel assembly at the corresponding position of the core needs to be replaced. The loading and unloading of fuel assemblies in the reactor is mainly done by the fuel handling and storage system (referred to as the PMC system). The loading and unloading machine is the core equipment o...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem that the existing device cannot switch the load mode of the light and heavy components underwater, and provides an underwater switching device that integrates the load simulation of the light and heavy components of the nuclear power plant loading and unloading machine

Images