A Neutron Poison Encapsulation Particle with Thermal Attachment Properties

Abstract

The invention relates to an encapsulation particle and in particular relates to a neutron poison encapsulation particle with hot adhesion characteristics. The neutron poison encapsulation particle has a multi-layer shell structure, wherein a particle surface layer which can be shrunk and broken at high temperature is adopted as the outermost shell structure; a central area of the particle is provided with a particle poison core which has high-temperature gelling characteristics and is doped with a neutron poison; a particle middle cladding layer which is in a one-layer or multi-layer shell structure and has the high-temperature gelling characteristics is formed between the particle surface layer and the particle poison core. The neutron poison encapsulation particle can be carried and injected into a reactor core by a cooling agent through a special system under a severe accident condition that the reactor core of the nuclear reactor is melt down, so that the reactor core is deeply poisoned, and recriticality of the damage reactor core is completely avoided.

Description

technical field [0001] The invention relates to a coating body particle, in particular to a neutron poison coating body particle with thermal adhesion properties. Background technique [0002] The criticality safety of nuclear materials is the cornerstone of nuclear safety and the safety prerequisite that all processes, methods and systems must ensure. Regardless of the working conditions, the means to be adopted, and the final price paid, criticality safety must be guaranteed, otherwise the intermittent or continuous chain reaction of nuclear materials will cause immeasurable losses. The present invention seeks to manufacture a kind of neutron poison coating body particles with thermal adhesion characteristics, in order to effectively inject neutron poison into the reactor core under the serious accident condition of nuclear reactor core meltdown, and utilize the heat of the poison particles The attachment feature realizes long-term and reliable residence of neutron poison...

AI Technical Summary

Problems solved by technology

Regardless of the working conditions, the means to be adopted, and the ultimate cost, criticality safety must be guaranteed, otherwise the chain reaction of nuclear materials that occurs intermittently or continuously will cause immeasurable losses

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