Solid critical device

Abstract

The invention discloses a solid critical device. The device comprises a container, an integrated reactor core, a reactivity adjusting mechanism, a rapid shutdown mechanism and a shielding body, the integrated reactor core is arranged in the container, the rapid shutdown mechanism penetrates through the integrated reactor core from the center of the top of the container and penetrates out of the bottom end of the container, the reactivity adjusting mechanism is arranged on the inner wall of the container, the shielding body covers the container, a support is arranged at the bottom end of the container, and the support and the shielding body are both erected on a supporting piece. The problem of rapid rod falling of the rapid shutdown mechanism under a small size is solved, the safety of theexperimental device is significantly improved, and the device has the advantages of environmental friendliness, high inherent safety, compact structure, small size, light weight and the like.

Description

technical field [0001] The invention belongs to the technical field of nuclear engineering, and in particular relates to a solid-state critical device. Background technique [0002] The critical device is to control the physical performance of the reactor, it is composed of enough fissile materials and other materials, it can maintain a controllable chain reaction, and it operates at a very low power level. Traditional critical devices generally use sealed containers with water as the moderator and heat-conducting material. The disadvantage of this type of critical device is that there is an accident risk of coolant loss. In addition, the rapid shutdown mechanism of the traditional critical device generally uses the method of the neutron absorber rod falling under the action of gravity after the motor is powered off to realize the shutdown of the device. The falling acceleration of the neutron absorber rod is fixed, especially at the initial stage of falling. Small, and the...

AI Technical Summary

Problems solved by technology

Traditional critical devices generally use airtight containers with water as the moderator and heat-conducting material. The disadvantage of this type of critical device is that there is an accident risk of coolant loss

In addition, the rapid shutdown mechanism of the traditional critical device generally uses the method of the neutron absorber rod falling under the action of gravity after the motor is powered off to realize the shutdown of the device. The falling acceleration of the neutron absorber rod is fixed, especially at the initial stage of falling. Small, this disadvantage is more pronounced in small devices with a short drop stroke

In addition, the traditional critical device has no reactivity adaptive module, and its reactivity control needs to be adjusted by monitoring the core neutron flux data and feeding it back to the control system

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