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Design method for core cooling function control strategies in nuclear power plant on basis of signs

A core cooling and control strategy technology, applied in nuclear power plant control, computer-executed nuclear control, nuclear power plants, etc., can solve system design and function changes, control and mitigate design changes, affect core cooling control strategy framework and Design issues such as the design of fixed values ​​to achieve the effect of reducing the risk of misjudgment, avoiding delays in handling accidents, and comprehensively analyzing the scope

Pending Publication Date: 2019-11-12
CHINA NUCLEAR POWER ENG CO LTD
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Problems solved by technology

On the other hand, even for different units of the same reactor type, due to the continuous improvement of unit design, changes in system design and functions may occur, which will lead to changes in the control and mitigation design of the core cooling function of the unit, and then Affects the design of core cooling control strategy architecture and design settings

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  • Design method for core cooling function control strategies in nuclear power plant on basis of signs

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[0050] (1) Analysis of core cooling symptom limits

[0051] According to the design characteristics of the nuclear power plant and the simulation calculation results of the core operating conditions, the symptoms of insufficient core cooling function are analyzed. After analysis, the abnormal physical quantities when the core cooling is insufficient include: parameter A-core outlet temperature (the corresponding instrument is Tco1, Tco2, Tco3), parameter B-main system heat pipe section temperature (Thl1, Thl2, Thl3), parameter C-pressure vessel liquid level (Lv1, Lv2). Analysis and determination of core cooling control target core hot spot factor Y and instrument reading change relationship function set is F A (Tco1, Tco2, Tco3), F B (Thl1, Thl2, Thl3), F C (Lv1, Lv2), this is a well-known technology in the art. The range of Y within the safety criteria of the unit is R, and according to the relationship function between Y and the instrument reading, the corresponding readi...

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Abstract

The invention relates to a design method for core cooling function control strategies in a nuclear power plant on the basis of signs. The design method comprises the following steps: (1) performing core cooling sign limit value analysis, and determining a meter combination theta which characterizes insufficient core cooling so as to obtain a limit value demand for a meter reading in the meter combination theta of core cooling characterization signs; (2) determining the list of accidents in which core cooling is challenged; (3) analyzing core cooling manners in the nuclear power plant, determining a core cooling manner set omega, and determining an optimal core cooling manner sequence according to the comprehensive cooling capacity ranking of the core cooling manners; (4) verifying and adjusting the core cooling manner sequence; and (5) acquiring core cooling function control strategies designed for nuclear power units with different technical characteristics. The design method providedby the invention can obtain an optimal sign-oriented strategy for recovering insufficient cooling of a key safety function core according to the design characteristics of different nuclear power units, and the advancement and safety of the design method are better shown.

Description

technical field [0001] The invention belongs to the technical field of nuclear power plant design, and in particular relates to a design method of a symptom-based nuclear power plant core cooling function control strategy. Background technique [0002] The design of nuclear power plants is complex, involving a large number of systems and equipment, which may lead to a large number of initial causes of accidents, and if respective countermeasures are formulated for them, the number will be huge. The symptom-based accident procedure, by controlling the key safety functions of the nuclear power plant affected after the accident, realizes the purpose of controlling and mitigating the consequences of the accident. It can effectively deal with complex working conditions and superimposed accidents, and is the most widely used advanced accident procedure in the world. Approach. Compared with the accident procedure system of the simple event-oriented method, the symptom-oriented met...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18G21D3/00G21D3/04
CPCG21D3/001G21D3/04G21C15/18Y02E30/30Y02E30/00
Inventor 易珂孙涛赵侠张圣陶朱金刚
Owner CHINA NUCLEAR POWER ENG CO LTD
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