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Tuning method for verification criterion of periodic test of overtemperature and overpower circuit protection channel of nuclear power plant

A technology for circuit protection and regular testing, which can be applied to nuclear power generation, power plant safety devices, and greenhouse gas reduction, and can solve problems such as inapplicability

Active Publication Date: 2016-02-10
CHINA TECHENERGY +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] At present, the setting method of periodic test verification criteria for protection channels can only be applied to the protection logic of simple channels, and is not suitable for complex circuit calculations such as over-temperature and over-power

Method used

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  • Tuning method for verification criterion of periodic test of overtemperature and overpower circuit protection channel of nuclear power plant
  • Tuning method for verification criterion of periodic test of overtemperature and overpower circuit protection channel of nuclear power plant
  • Tuning method for verification criterion of periodic test of overtemperature and overpower circuit protection channel of nuclear power plant

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Embodiment Construction

[0089] The entire primary circuit in the Ling Ao Phase I nuclear power plant is composed of three loops, and the over-temperature and over-power protection functions of these three loops are completely the same, such as figure 1 As shown, 033MT and 030MT represent the on-site thermal resistance signals of the temperature of the cold pipe section and the hot pipe section respectively; 419CT and 418CT modules convert the thermal resistance signal into a voltage signal; 415FI, 416FI and 401FI are first-order inertial link modules; 402ZO, 403ZO, 404ZO, 405ZO and 406ZO are adder operation modules; 404MT is a first-order lead-lag link module; 401DR is a differential link module; 402MS and 416AM are neutron flux collection, processing and calculation modules; 403GD and 404GD are function generation modules; The 443XU1 / 2, 444XU1 / 2 and 445XU1 / 2 are the average temperature threshold module, over-temperature threshold module, and over-power threshold module respectively. Each protection ...

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Abstract

The invention provides a tuning method for a verification criterion of a periodic test of an overtemperature and overpower circuit protection channel of a nuclear power plant. The method comprises the steps of: according to an accident working condition, simulating an accident working condition signal collected from a site; obtaining a function of an input voltage obtained by calculation of a threshold value module in a time domain in the accident working condition; when the input voltage reaches a threshold value voltage, triggering the threshold valve module in the accident working condition to act; and then obtaining a time range and a voltage range, in which the accident working condition is triggered to act according to systematic deviation of the whole protection channel: Tmax, Tmin and Vmax, Vmin, thereby providing the verification criterion of the periodic test of the overtemperature and overpower circuit protection channel of the nuclear power plant.

Description

technical field [0001] The invention belongs to the technical field of safety inspection of nuclear power plants, and in particular relates to a method for setting regular test verification criteria for over-temperature and over-power circuit protection channels of nuclear power plants. Background technique [0002] The instrument control system is the nervous system of the nuclear power plant, which is directly related to the safe, reliable and stable operation of the nuclear power plant. The KRG system is a centralized control analog system, which is the key system of the instrument control system of the nuclear power plant. Its function defines the output from the on-site sensor, The input signal to the reactor protection system (RPR system), after the signal is processed in the KRG system (including square extraction, linearization, filtering, differentiation, lead-lag, etc.), threshold comparison is performed, when the signal exceeds the set limit After the value is set...

Claims

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Application Information

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IPC IPC(8): G21D3/06
CPCY02E30/00
Inventor 李景志刘旭东张红梅孙洪涛郑伟智白玮柏祥基夏利民
Owner CHINA TECHENERGY
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