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Reactor shielding layer component with high density and large neutron-absorption cross section

A shielding layer and high-density technology, applied in the field of nuclear engineering, can solve the problems of reactor safety uncertainty, shielding layer component installation, fixation and replacement problems, low density of boron carbide pellets, etc., to achieve small neutron capture area change, The effect of less loss of physical value and high density

Active Publication Date: 2016-01-13
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Boron carbide has the advantages of high neutron capture cross-section, wide absorption energy spectrum, no secondary radiation pollution, and low price, but the density of boron carbide pellets is low. The density is lower than that of liquid heavy metal coolant, so that when this shielding layer assembly is applied in a liquid heavy metal coolant reactor, the buoyancy of the shielding layer assembly is greater than its own gravity, which brings technical difficulties to the installation, fixing and replacement of the shielding layer assembly, and also Brings uncertainty to reactor safety

Method used

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  • Reactor shielding layer component with high density and large neutron-absorption cross section
  • Reactor shielding layer component with high density and large neutron-absorption cross section
  • Reactor shielding layer component with high density and large neutron-absorption cross section

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Embodiment Construction

[0029] Such as figure 1 , figure 2 As shown, the shielding layer assembly of the present invention includes: an operating head 1, an outer sleeve 2, a neutron shielding block 3, a connecting rod 4, and a lower pin 5; the upper end of the shielding layer assembly is the operating head 1, and the lower end is the lower tube The pin 5, the operating head 1 and the lower pin 5 are connected through the outer sleeve 2; the outer sleeve 2 is a regular hexagonal hollow cylinder, and the center is a connecting rod 4, and the connecting rod 4 is fixedly connected with the operating head 1 and the lower pin 5; the outer sleeve A neutron shielding block 3 is arranged between the tube 2 and the connecting rod 4; the neutron shielding block 3 is fixedly connected to the lower pin 5, and the outer wall of the neutron shielding block 3 contains a spacer 10; between the neutron shielding blocks 3, the outer casing 2 and the neutron shielding block 3, between the connecting rod 4 and the neu...

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Abstract

The invention provides a reactor shielding layer component with high density and a large neutron-absorption cross section, which comprises five parts: an operation head, an outer sleeve, a neutron shielding block, a connecting rod and a lower pipe foot. According to the invention, the materials with high density and large neutron-absorption cross section like metal hafnium and tungsten are used as neutron-absorption shielding materials, so as to make the buoyancy of the shielding layer component applied in the liquid-state heavy metal coolant reactors smaller than self-gravity, thus the installation, the fixation and the replacement are convenient. The reactor shielding layer component with high density and the large neutron-absorption cross section provided herein is suitable for liquid-state heavy metal coolant reactors with coolant provided with high density.

Description

technical field [0001] The invention relates to a reactor shield assembly with high density and large neutron absorption section, which is suitable for reactors with relatively high coolant density and belongs to the field of nuclear engineering. Background technique [0002] The liquid heavy metal coolant reactor is a type of fast neutron reactor firstly developed and successfully applied to nuclear submarines in Russia. Due to its inherent safety features, it was recommended as the sixth-generation nuclear reactor at the Fourth Generation Nuclear Reactor International Symposium held in Tokyo, Japan in 2002. It is one of the main concept reactor systems of Generation IV nuclear power plants. Accelerator-driven subcritical system is an ideal nuclear waste transmutation device. Liquid heavy metal coolant is the main candidate material for accelerator-driven subcritical reactor coolant due to its good neutronic characteristics, safety characteristics and heat transfer capabili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21F3/00
Inventor 梅华平陈建伟吴庆生黄群英刘少军
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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