Underwater vertical volume shrinkage treatment method and device for fuel-related components

Abstract

The invention relates to the technical field of spent fuel post-treatment, and particularly discloses an underwater vertical volume shrinkage treatment method and device for fuel-related components ofa pressurized water reactor nuclear power station. According to the device, a storage rack is arranged at the bottom of a canning well, a clamping device is arranged on the upper end face of the storage rack, and the clamping device can be used for clamping and positioning fuel-related components to be sheared; a shearing device is arranged on the storage rack and can shear the fuel-related components into single rods and connecting handles; storage containers are arranged at the bottom of the canning well and are positioned near the storage rack; and single rods and connecting handles whichare cut and separated from the fuel-related components can be stored in different storage containers in a classified mode through a mechanical arm. According to the method, underwater chipless shearing separation can be conducted on the fuel-related components in a vertical state, the separated single rods and connecting handles are stored in a classified mode and finally stored in a spent fuel pool grillwork, and the purpose of reducing the storage space of the related components is achieved.

Description

technical field [0001] The invention belongs to the technical field of spent fuel reprocessing, and in particular relates to an underwater vertical shrinkage treatment method and device for fuel-related components of a pressurized water reactor nuclear power plant. Background technique [0002] Fuel-related components mainly include control rod components and burnable poison components, among which the control rod components are used to control the reactivity of the reactor; the burnable poison components are used to reduce the residual reactivity of the initial core and ensure that the reactor has a negative moderator temperature coefficient; Both are used to ensure the safety of the reactor operation. [0003] Because the spent fuel reprocessing plant does not receive discarded related components, the discarded related components will always be stored in the spent fuel pool spent fuel components or special adapter components before the decommissioning of the nuclear power ...

AI Technical Summary

Problems solved by technology

This method reduces the distance between single rods of related components and reduces the storage space of discarded related components with a shrinkage ratio of nearly 10:1. However, this shrinking method needs to turn the related components to a horizontal state before cutting and separating them. During the storage process, the single rod is turned over to the vertical state. The process is relatively complicated, not only requires various complicated turning equipment, but also requires a relatively large cross-sectional size of the shrinking site

[0005] In similar Tianwan WWER units, the size of the tanking well is small, and it is impossible to turn the relevant components to a horizontal state in the tanking well

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