Design method for reducing maloperation rate of reactor protection system

A technology of reactor protection and design method, applied in the direction of reducing greenhouse gases, nuclear power generation, safety devices of power plants, etc., can solve the adverse effects of nuclear power plant safe operation, reduce the operating economy of nuclear power plant, etc., and achieve the reduction of accidental shutdown /Risks of misdesigning drivers, effects of improving economy and safety

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

Therefore, when actually implementing the above-mentioned "two out of one" reactor protection system function, there is a risk that the digital instrumentation and control system (DCS) module of any protection channel in the two protection channels will accidentall

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  • Design method for reducing maloperation rate of reactor protection system

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[0021] In order to be able to understand the above objectives, 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 the embodiments of the present application and the features in the embodiments can be combined with each other if they do not conflict with each other.

[0022] In the following description, many specific details are explained in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from the scope described here. Therefore, the protection scope of the present invention is not disclosed below. Limitations of specific embodiments.

[0023] In order to minimize the misoperation rate of the reactor protection system introduced due to the failure or maintenance of the DCS module, and to improve the economy of the nuclear power plant ...

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Abstract

The invention discloses a design method for reducing the misoperation rate of a reactor protection system. The method comprises the following steps: an acquisition and operation unit in a third protection channel firstly screens received signals, and then the screened signals are quantitatively compared; acquisition and operation units in a first protection channel and a second protection channelrespectively quantitatively compare the received signals; and the signals quantitatively compared by the three acquisition and operation units undergo two-out-of-three logic operation processing, andthe generated final protection action signal is input into the reactor protection system. The method avoids the maloperations of the protection system, caused by failure or maintenance of a DCS modulein one channel of a one-out-of-two voting logic function in the running period of a nuclear power plant, reduces the spurious shutdown/wrong special driving risks of the nuclear power plant, and is beneficial for improving the economical and safe property of the nuclear power plant.

Description

technical field [0001] The invention relates to the design field of the reactor protection system of a nuclear power plant, in particular to a design method for reducing the malfunction rate of the reactor protection system. Background technique [0002] The reactor protection system is a very important part of the nuclear power plant, and plays a vital role in the safe, economical and reliable operation of the nuclear power plant. Reactor protection system involves two performance indicators: rejection rate and malfunction rate. The rejection rate refers to the probability that the system cannot act due to random faults when the system is required to generate protection actions; the false action rate refers to the number of false actions of the system or components within a unit time. [0003] For a nuclear power plant reactor protection system structure that is generally designed with three protection channels and the logic vote is "two out of three", when some of the rea...

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Application Information

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IPC IPC(8): G21D3/06
CPCG21D3/06Y02E30/00
Inventor 王琳冯威朱攀肖鹏何正熙青先国王远兵刘堂胜刘宏春王殳李谢晋许东芳罗炜陈鹏伍巧凤李昱孙诗炎孙剑
Owner NUCLEAR POWER INSTITUTE OF CHINA
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