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Safety injection trigger method, device and system when main pump is running in shutdown condition of nuclear power plant

A technology for nuclear power plants and working conditions, applied in power plant safety devices, nuclear engineering, nuclear power generation, etc., can solve problems such as system pressure reduction, safety injection system, and nuclear power plant safety.

Active Publication Date: 2022-04-15
NUCLEAR POWER INSTITUTE OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This design would result in the system pressure drop induced by some LOCA accidents not being able to trigger the injection of the safety injection system under shutdown conditions, thus reducing the safety of the nuclear power plant

Method used

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  • Safety injection trigger method, device and system when main pump is running in shutdown condition of nuclear power plant
  • Safety injection trigger method, device and system when main pump is running in shutdown condition of nuclear power plant
  • Safety injection trigger method, device and system when main pump is running in shutdown condition of nuclear power plant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] like figure 2 As shown in the figure, the safety injection triggering method when the main pump is running in the shutdown condition of the nuclear power plant includes the following steps:

[0082] S1. Determine whether the main pump is running under shutdown conditions, determine whether the pressure regulator pressure is low and the safety injection blocking signal is triggered, and determine whether the heat pipe section is in a low subcooling degree. If the above determination results are all: "Yes", then generate : safety injection signal of main pump operation in shutdown condition;

[0083] S2. The safety injection system of the primary loop of the reactor triggers the execution of the safety injection action after receiving the safety injection signal of the main pump running in the shutdown condition;

[0084] The above-mentioned method for triggering the safety injection when the main pump is running in the shutdown condition of the nuclear power plant: it ...

Embodiment 2

[0100] like image 3 and Figure 4 As shown in the figure, the safety injection triggering device when the main pump is running in the shutdown condition of the nuclear power plant includes:

[0101] a first controller for judging whether the main pump is running under shutdown conditions,

[0102] A second controller for judging whether the voltage regulator pressure is low and the safety injection blocking signal is triggered,

[0103] a third controller for determining whether the heat pipe section is in a low subcooling degree,

[0104] When the determination results of the first controller, the second controller, and the third controller are all: "Yes", the controller is used to generate the "main pump running safety injection signal in shutdown condition" and start the controller.

Embodiment 3

[0106] like image 3 and Figure 4 As shown, preferably, in order to realize the above-mentioned first controller, second controller, third controller, and safety injection start controller, the present invention provides two specific implementation schemes, wherein scheme 1 adopts the existing Manual operation triggers the acquisition of "voltage regulator pressure low and low safety injection blocking signal". In Scheme 2, automatic logic is used to automatically trigger "voltage regulator pressure low and low safety injection blocking signal". In the prior art, when the above-mentioned controller is not provided, the second controller that triggers the low-pressure and low-safety injection blocking signal of the voltage stabilizer is only used to trigger the blocking instruction. In this application, the second controller is given New function, the new function is used as the criterion for triggering the safety injection signal.

[0107] like image 3 , Scheme 1 is:

[...

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Abstract

The invention discloses a method, device and system for triggering safety injection when the main pump is running in the shutdown condition of a nuclear power plant, comprising the following steps: S1, determining whether the main pump is running under the shutdown condition, and determining whether the pressure of the voltage stabilizer is low or low for safety injection Whether the blocking signal is triggered, determine whether the heat pipe section is at a low subcooling degree, if the above judgment results are all: "Yes", then generate: a safety injection signal for the main pump running in the shutdown condition; S2, the safety injection system of the primary circuit of the reactor is closed The safety injection action is triggered after the main pump running safety signal in the shutdown condition; the safety injection trigger method when the main pump is running in the shutdown condition of the above-mentioned nuclear power plant: used to realize the operation of the main pump and the reactor coolant in the shutdown condition The loss accident triggers the safety betting action for the double constraint.

Description

technical field [0001] The invention relates to the control field of a safety injection system, in particular to a safety injection triggering method, device and system when the main pump is running in the shutdown condition of a nuclear power plant. Background technique [0002] As an important protection signal in the special protection system of a nuclear power plant, the safety injection signal is used to trigger the operation of the safety injection system under specific accident conditions (such as a loss of coolant accident (LOCA)) and inject emergency core cooling water into the primary circuit. [0003] like figure 1 As shown, under normal working conditions, the general system will set a normal working condition safety injection pressure setting value P2 (12.3Mpa or a point value selected from the range of 11MPa to 13MPa), when the system detects that the pressure of the regulator is less than When it is equal to the set value P2 of the safety injection pressure u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G21D3/04G21C15/18
CPCG21D3/04G21C15/18Y02E30/00Y02E30/30
Inventor 申亚欧丁书华吴清邓坚冷贵君刘昌文陈伟钱立波吴丹李仲春黄涛党高健马海福鲍辉沈丹红
Owner NUCLEAR POWER INSTITUTE OF CHINA