A solid state critical device

Abstract

The invention discloses a solid-state critical device, comprising a container, an integrated core, a reactivity adjustment mechanism, a quick shutdown mechanism and a shielding body, wherein the integrated core is arranged in the container, and the rapid shutdown mechanism extends from the container The center of the top penetrates the integrated core and goes out from the bottom end of the container, the reactivity adjustment mechanism is arranged on the inner wall of the container, the shielding body is covered outside the container, and the bottom end of the container is provided with a bracket, the bracket and the shield The bodies are all placed on the support. The invention solves the problem of rapid rod dropping under the small size of the rapid shutdown mechanism, and significantly improves the safety of the experimental device.

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] A critical device is a device that is composed of enough fissile material and other materials to maintain a controlled nuclear chain reaction and operate at very low power levels in order to grasp the physical properties of the reactor. Traditional critical devices generally use sealed containers, with water as moderator and heat-conducting material. The disadvantage of such critical devices is the risk of accidental loss of coolant. In addition, the rapid shutdown mechanism of the traditional critical device generally uses the method of dropping the neutron absorber rod under the action of gravity to realize the shutdown of the device after the motor is powered off. The acceleration of the neutron absorber rod falling is fixed, especially in the initial stage of falling The effect of this disad...

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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