Protection system for dealing with heat rejection reduction superimposed SWCCF accidents

A protection system and accident technology, applied in the field of safety protection of PWR nuclear power plants, can solve problems such as damage, safety function failure, function loss, etc., and achieve the effect of ensuring safety

Active Publication Date: 2019-11-05
NUCLEAR POWER INSTITUTE OF CHINA
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Problems solved by technology

When a software common mode failure (SWCCF) occurs in the DCS system due to some unpredictable software errors or system-level failures, the RPS system function will be lost, and the automatically triggered safety functions will basically fail, mainly including: emergency shutdown protection, start-up assistance Water supply system, etc., may cause damage to the core and damage to the pressure boundary of the primary circuit

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  • Protection system for dealing with heat rejection reduction superimposed SWCCF accidents

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[0019] In order to understand the above-mentioned purpose, features and advantages of the present invention more clearly, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, under the condition of not conflicting with each other, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope of this description. Therefore, the protection scope of the present invention is not limited by the following disclosure. limitations of specific examples.

[0021] Please refer to figure 1 , the present application provides a protection system for coping with SWCCF accidents with heat reduction reduction, and the pr...

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Abstract

The invention discloses a protection system for dealing with heat rejection reduction superimposed SWCCF (software common-mode failure) accidents. The protection system is used for the heat rejectionreduction accident of one loop in a nuclear power plant, and protects the nuclear power plant when the safety level platform of the nuclear power plant has the SWCCF condition and a reactor main protection system loses the protection function. The protection system comprises: a measurement unit used for measuring relevant safety data of the nuclear power plant; a processing and transmitting channel used for processing the measured relevant safety data and transmitting the processed data to a control unit; and the control unit used for performing logical judgment on the data processed by the transmitting channel and performing a protection operation on the nuclear power plant according to the judgment result. The protection system of the invention can trigger emergency shutdown and start anauxiliary water supply system when the main protection system fails in order to avoid the nuclear power plant from losing protection, so the safety of a core and the integrity of a containment are ensured.

Description

technical field [0001] The invention relates to the field of safety protection of a pressurized water reactor nuclear power plant, in particular to a protection system for dealing with heat discharge reduction superimposed SWCCF accidents. Background technique [0002] For nuclear power plants whose reactor protection system adopts a digital control system (DCS), under normal circumstances, the loss of external loads, accident shutdown of steam turbines, loss of non-emergency AC power supply for auxiliary equipment of the plant, loss of normal feed water flow, and rupture of main feed water system pipes, etc. In the event of a thermal reduction accident, the reactor protection system (RPS) of the safety-level platform will realize the functions of triggering the emergency shutdown system and driving the special safety facilities. When a software common mode failure (SWCCF) occurs in the DCS system due to some unpredictable software errors or system-level failures, the RPS sy...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21D3/06G21C17/00
CPCG21C17/00G21D3/06Y02E30/00Y02E30/30
Inventor 喻娜卢毅力吴清关仲华冉旭方红宇李峰邱志方陈宏霞初晓蔡容鲜麟蒋孝蔚刘宏春
Owner NUCLEAR POWER INSTITUTE OF CHINA
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