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Pressurized water nuclear reactor sleeve type standby shutdown system and method

A technology for nuclear reactors and shutdown systems, which is applied in the fields of reactors, nuclear engineering, nuclear power generation, etc., can solve the problems of mixing liquid neutron absorbers with primary circuit coolants, shorten the restart interval, save system layout space, and save The effect of cleaning workload

Inactive Publication Date: 2019-01-15
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a casing-type backup shutdown system for pressurized water nuclear reactors, which solves the problem that the existing backup shutdown system causes the liquid neutron absorber to mix with the primary circuit coolant

Method used

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  • Pressurized water nuclear reactor sleeve type standby shutdown system and method
  • Pressurized water nuclear reactor sleeve type standby shutdown system and method

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Embodiment 1

[0045] Such as figure 1 , figure 2 As shown, the casing-type backup shutdown system of a pressurized water nuclear reactor includes a casing-type injection unit 4 arranged in the pressure vessel and a shutdown fluid circulation system arranged outside the pressure vessel, and the casing-type injection unit 4 is inserted into the reactor In the core, the sleeve type injection unit 4 includes an inner sleeve 41 and an outer sleeve 42 arranged outside the inner sleeve 41, the lower end of the inner sleeve 41 is an open structure, and the outer sleeve 42 is a closed structure , There is a certain gap between the lower end of the inner sleeve 41 and the bottom of the outer sleeve 42, specifically, the gap between the lower end of the inner sleeve 41 and the bottom of the outer sleeve 42 is greater than or equal to the inner diameter of the inner sleeve 41 , the upper end of the inner casing 41 protrudes from the top of the outer casing 42, the side wall of the outer casing 42 is ...

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Abstract

The invention discloses a pressurized water nuclear reactor sleeve type standby shutdown system and method, the shutdown system comprises a sleeve type injection unit arranged in a pressure containerand a shutdown liquid circulation system arranged outside the pressure container, the sleeve type injection unit comprises an inner sleeve and an outer sleeve arranged on the outer side of the inner sleeve, the shutdown liquid circulation system comprises a soluble neutron poison box and a de-ionized water tank, the liquid discharging ends of the soluble neutron poison box and the de-ionized watertank are communicated with the outer sleeve through pipelines, circulating pumps are arranged on the pipelines, the liquid inlet end of the soluble neutron poison box and the liquid inlet end of thede-ionized water tank are communicated with the inner sleeve through pipelines, an outlet valve R1 and a return valve R 2 are respectively arranged on the pipelines of the liquid discharging end of the soluble neutron poison box and the liquid inlet end of the soluble neutron poison box, and an outlet valve W1 and a return valve W2 are respectively arranged on the pipelines of the liquid discharging end and the liquid inlet end of the de-ionized water tank. The shutdown system solves the problem that a liquid neutron absorber and a loop coolant are mixed due to the existing standby shutdown system.

Description

technical field [0001] The invention relates to the technical field of shutdown of pressurized water nuclear reactors, in particular to a bushing type standby shutdown system and method for pressurized water nuclear reactors. Background technique [0002] According to the newly promulgated "Nuclear Power Plant Design Safety Regulations (HAF 102-2016)" on nuclear power plant system design requirements, for reactor shutdown, the system design "must be composed of at least two diverse and independent systems" And guarantees that "even when the core is at its most reactive state, there must be at least one system capable of independently maintaining the reactor at a subcritical state at sufficient depth and with high reliability." [0003] According to the above requirements, the current pressurized water nuclear reactors are equipped with two sets of reactor shutdown systems. The first shutdown system mostly uses the control rod system to control the reactivity of the core. He...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C9/033
CPCG21C9/033Y02E30/30
Inventor 杨帆冉旭黄代顺张渝夏榜样喻娜张丹李峰卢川李松蔚邱志方鲜麟张卓华周科彭传新吴广皓林欣茹魏宗岚陆雅哲杨韵佳
Owner NUCLEAR POWER INSTITUTE OF CHINA
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