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Control rod for liquid heavy metal cooling reactor

A liquid heavy metal and reactor technology, applied in the field of reactor equipment, can solve problems such as low density, and achieve the effect of simple structure and easy maintenance

Inactive Publication Date: 2013-08-07
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

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a control rod for liquid heavy metal cooling reactors, which can solve the problem of traditional control rods on the basis of satisfying the reactivity control ability of lead-bismuth and lead-cooled reactors. In the environment of lead bismuth and lead coolant, due to the low density, it is impossible to rely on gravity to fall under the accident state and to stay in the core stably during the reactor refueling operation; and the present invention is simple in structure, reliable and easy to maintain

Method used

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  • Control rod for liquid heavy metal cooling reactor
  • Control rod for liquid heavy metal cooling reactor
  • Control rod for liquid heavy metal cooling reactor

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Embodiment Construction

[0023] Such as Figure 1-6 As shown, the present invention proposes a control rod applied to lead-bismuth and lead-cooled reactors, including a high-density absorber 1 (density greater than 10g / cm 3 ), void 2 and cladding 3;

[0024] The high-density absorber 1 is located in the center of the control rod structure and is used to absorb neutrons to meet the requirements of reactivity control and shutdown; the size of the high-density absorber 1 depends on the design requirements of the reactor, and the density of the high-density absorber 1 The density of the high-density absorber 1 is greater than that of lead, bismuth and lead. There are two types of implementations. The first type is a heavy metal absorber, including natural tungsten, natural rhenium or natural tantalum; the second type is a combination of heavy metal absorber and boron carbide. Mixtures, including a mixture of tungsten and boron carbide, a mixture of rhenium and boron carbide, a mixture of tantalum and bor...

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Abstract

The invention discloses a control rod for a liquid heavy metal cooling reactor, belonging to the field of nuclear reactors. The control rod is a part of a control rod assembly and is inserted into the core of the reactor together with a fuel assembly to control the reactivity. The control rod comprises a high-density neutron absorber (1), a gap (2) and an involucrum (3). The control rod provided by the invention is used for overcoming the problem that the traditional control rod cannot drop by virtue of gravity at an accident state due to small density in a bismuth-lead / lead cooling environment or stably stay in the reactor core when materials of the reactor are changed on the basis of meeting the reactivity control capability of a bismuth-lead / lead cooling reactor. The control rod provided by the invention is simple in structure and reliable and convenient to maintain.

Description

technical field [0001] The invention relates to the field of reactor equipment, belongs to the technical field of reactor engineering, in particular to a control rod of a lead-bismuth / lead cooling reactor. Background technique [0002] A commonly used way to control the reactor reactivity is to control the reactivity of the reactor by moving the control rods inserted into the reactor. The critical operation of the reactor is maintained by the chain fission reaction caused by neutrons, and the absorber in the control rod has a large neutron absorption capacity, which is used to absorb the neutrons of the reactor, thereby adjusting the neutron balance in the reactor, So as to achieve the goal of reactivity control and shutdown. In the control of the reactor, the reactivity is controlled by changing the amount of the absorber in the core by moving the control rod up and down. If the control rod is lifted up, part of the absorber will go out of the core, and the ability of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C7/103G21C7/10
CPCY02E30/35Y02E30/39Y02E30/40Y02E30/30
Inventor 王明煌肖会文刘超吴宜灿
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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