A core melt trap

Abstract

The invention belongs to the technical field of nuclear reactor safety, and particularly relates to a reactor core fused mass catching device. The reactor core fused mass laying and spreading of the existing fused mass catching device is nonuniform; the process is slow; a kinetic component can easily fail in serious accidents; the laying and spreading temperature reduction operation on the reactor core fused mass is influenced, and great potential safety hazards are caused. The reactor core fused mass catching device provided by the invention comprises a fused mass retention compartment, wherein the fused mass retention compartment is provided with a fused mass guiding device and is positioned under the reactor; a fused mass blasting laying and spreading device is arranged in the fused mass retention compartment; the laying and the spreading on the reactor core fused mass are uniform and fast; a non-kinetic mode is used; the reliability during the occurrence of the serious accidents is high.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor safety, and in particular relates to a reactor core melt catcher. Background technique [0002] After the serious accidents at the Three Mile Island Nuclear Power Plant in the United States and the Chernobyl Nuclear Power Plant in the former Soviet Union, the nuclear power industry began to concentrate on research and research on the prevention and mitigation of severe accidents. and improve the requirements of human factors engineering and other aspects. When a serious accident occurs in a pressurized water reactor nuclear power plant, the loss of core waste heat removal means will evaporate and exhaust the coolant, the core will be exposed and continue to heat up, the fuel elements will melt due to the loss of cooling, and the core melt will fall into the pressure vessel ( RPV) lower chamber, which in turn causes the failure of the lower head of the pressure vessel. If effective measure...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the spreading process of the core melt is relatively slow, and the spread of the core melt is uneven, which may easily cause the accumulation of the core melt, which is not conducive to the cooling of the core melt, and is also not conducive to the full use of the trap to capture. collection effect

And none of the above-mentioned patents related to the core catcher considers the use of blasting devices to passively promote the spread of the core melt

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