Sub-critical miniature reactor driven by neutron tubes

Abstract

The invention discloses a sub-critical miniature reactor driven by neutron tubes. The sub-critical miniature reactor comprises fuel rods, the neutron tubes, a coolant, cladding tubes, a reflecting layer, a shielding layer and other ingredients, wherein the neutron tubes are taken as neutron sources for operation of a sub-critical miniature reactor and are uniformly dispersed and distributed in a sub-critical reactor core, and the neutron-flux density distribution of the reactor core is initiatively flattened in design. The quantity of neutrons output by each neutron tube in the reactor core in unit time can be continuously adjusted, so that power in each position in the reactor can be continuously adjusted, and the output power in each position of the reactor core is actively controlled. Under the accident condition, a power supply for the neutron tubes can be turned off at any time as required, reactor shutdown is completed, and serious accidents are completely eradicated. Due to the advantages, the reactor has high safety and economic performance and has great significance in improvement of geometric dimension miniaturization and maneuverability of the reactor.

Description

technical field [0001] The invention belongs to the field of reactor core design, in particular to a subcritical micro-reactor driven by a neutron tube. Background technique [0002] Compared with critical reactors, the safety of subcritical reactors has unique advantages. A subcritical reactor can be shut down by disconnecting the external source system from the subcritical reactor. At present, the main external neutron sources used in the operation of subcritical reactors are in the following two ways: (1) The proton accelerator generates high-energy proton beams to bombard the target material, through (p, 2n) reaction or (p, n) reaction Generate high-energy spallation neutrons as the external neutron source of the subcritical reactor; (2) use high-energy neutrons produced by fusion reactions as the neutron source of the subcritical reactor. Both of the above two driving methods have the characteristics of large geometric size of the external device, high output power of...

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Problems solved by technology

[0008] The purpose of the present invention is to: aim at the problem of uneven spatial distribution of neutron flux density in the current subcritical reactor, as well as the problems of reactivity control and power output control of the core in the reactor, the present invention aims to provide a method that can develop It is a kind of subcritical micro-reactor, which is capable of real-time active control of the reactivity and output power of each part of the core due to the spatial distribution of neutron flux density in the flat reactor. The designed reactor has the characteristics of small geometric size and high mobility.

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