System for keeping constant temperature of target window of accelerator driven sub-critical reactor

Abstract

The invention discloses a system for keeping the constant temperature of a target window of an accelerator driven sub-critical reactor. The system is composed of a current sensor, a DCCT, a target loop rack, a cock, a proton beam tube, a guide tube, an outer sleeve, a target fixing plug, an automatic temperature control electromagnetic induction coil, the target window, a sub-critical reactor core, a reactor container and a reactor-core lower grid tray. The system has the advantages that after proton beam currents of an accelerator suddenly disappear, as the beam current strength is reduced, working signals of the electromagnetic coil are triggered through current changes, the electromagnetic coil rapidly works, the bottom of the outer sleeve is heated, coolants located in the outer sleeve and below the target window are further heated, the temperature of the target window after the proton beam currents disappear is kept constant, it is guaranteed that after the proton beam currents of the accelerator disappear, the temperature of the target window can not drop obviously, heat stress changes, caused by beam disappearing, of the target window are greatly reduced, and the target window material fatigue fracture risk caused by the fact that the heat stress cycle of the target window is generated due to the proton beam currents of the accelerator frequently disappear is further lowered.

Description

Technical field [0001] The invention relates to accelerator-driven sub-critical reactor spallation target technology, and belongs to the technical field of safety of accelerator-driven sub-critical reactors. Background technique [0002] The accelerator-driven subcritical reactor is currently an ideal device dedicated to the transmutation of radioactive nuclear waste, the effective use of nuclear resources and the production of nuclear energy. It is mainly composed of three parts: a proton accelerator, a spallation target, and a subcritical reactor. It is a lead-bismuth-cooled pool-type fast reactor. The basic principle is: the proton beam generated by the accelerator bombards the heavy metal target (lead-bismuth alloy) set in the subcritical reactor, causing a spallation reaction, and then generating neutrons through the inner nuclear cascade and the outer nuclear cascade. A proton with an energy of 1GeV produces about 30 neutrons on a thick target, and the spallation target pr...

AI Technical Summary

Problems solved by technology

[0004] The technology of the present invention solves the problem: aiming at the problem that the windowed target window of the existing accelerator-driven subcritical reactor may cause thermal fatigue when the proton beam of the accelerator is frequently lost, it provides a method that can maintain the target after the proton beam of the accelerator is lost. The temperature of the window is constant, and it is an efficient and real-time system for maintaining the constant temperature of the target window of the accelerator-driven subcritical reactor after beam loss

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