A Multi-Cock System for Accelerator-Driven Subcritical Stack Refueling

Abstract

A multi-cock system for an accelerator to drive a subcritical reactor to refuel comprises a large cock, a first small cock, a second small cock, a control deflection barrel and a refueling machine, wherein the large cock is installed on a reactor top cover to be concentric with the reactor top cover, the first small cock and the second small cock are installed on the large cock and are eccentric to the large cock, the refueling machine is installed on the first small cock and is eccentric to the first small cock, the control deflection barrel is connected onto the second small cock, the control deflection barrel is a cylindrical mechanism carrying a control bar system, and the control deflection barrel is provided with a curved through groove from the axis to the outside and from top to bottom, which is used for detaching an accelerator proton beam tube. When the reactor runs, the control deflection barrel is positioned right above a reactor core. Fusible alloy at the sealed position of the cock is molten in refueling operation, the second small cock firstly translates the control deflection barrel to the position which is away from the reactor core so as to reserve a space for the refueling operation, and then a crankshaft connecting rod mechanism consisting of the large cock, the first small cock and the refueling machine can align the refueling machine to any refueling position on the reactor core through the reciprocating movement. Due to the adoption of the multi-cock system, the refueling circulation of an accelerator drive system (ADS) reactor can be well completed, and the normal work of other systems of the ADS is not influenced.

Description

technical field [0001] The invention belongs to the technical field of refueling of an accelerator-driven subcritical reactor (ADS reactor for short), and in particular relates to a multi-cock system for refueling of an accelerator-driven subcritical reactor. Background technique [0002] The ADS reactor is the "combination" of the two major projects in the development of nuclear science and technology in the last century - the accelerator and the reactor. It is considered to be the most promising nuclear waste transmutation technology. The ADS reactor consists of a proton accelerator, a spallation target and a subcritical reactor. The proton beam generated by the accelerator bombards the heavy alloy spallation target to undergo a spallation reaction, and neutrons are generated and supplied to the subcritical core. The spallation reaction is a process in which intermediate-energy protons hit heavy atomic nuclei and some neutrons are bombarded out. Each proton interacts wit...

AI Technical Summary

Problems solved by technology

However, in the ADS reactor, due to the existence of the accelerator proton beam tube, the range of movement of the small cock is greatly reduced. If the control rod lifting mechanism is still installed on the small cock, due to the relatively small rotation range of the small cock, the movement of the small cock The control rod system cannot be rotated to a position concentric with the core, and the function of the control rod system cannot be realized

[0007] In recent years, the research on the ADS reactor has focused on the neutron physics performance, and the research literature on the refueling system of the ADS reactor is relatively small or not described in detail, but the refueling problem of the ADS reactor brought about by the accelerator needs to be solved urgently

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