Protection system for dealing with heat rejection increase superimposed SWCCF accidents

A protection system, heat increase technology, applied in the direction of reducing greenhouse gases, nuclear power generation, power plant safety devices, etc., can solve the problems of endangering the safety of the core and containment, loss of function, failure of safety functions, etc., and achieve the effect of improving 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, safety injection function, containment spray function, etc., which may endanger the safety of the core and containment

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  • Protection system for dealing with heat rejection increase 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] Basic principle of the present invention is:

[0022] After the primary loop heat dissipation increases and the superimposed safety level platform SWCCF ...

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Abstract

The invention discloses a protection system for dealing with heat rejection increase superimposed SWCCF (software common-mode failure) accidents. The protection system is used for protecting a nuclearpower 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 improves the safety of the nuclear power plant.

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 responding to an increase in heat exhaust and a superimposed SWCCF accident. Background technique [0002] For nuclear power plants with a digital control system (DCS) for the reactor protection system, under normal circumstances, when the water supply system fails to cause an increase in the feedwater flow rate, the main steam system accident pressure relief, or the main steam system pipe rupture, etc., the safety level The reactor protection system (RPS) of the 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 system function will be lost, and the automatically triggered safety functions wi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21D3/06
CPCG21D3/06Y02E30/00
Inventor 方红宇卢毅力吴清关仲华冉旭李峰邱志方蒋孝蔚陈宏霞喻娜初晓蔡容鲜麟刘宏春
Owner NUCLEAR POWER INSTITUTE OF CHINA
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