A priority management system for nuclear power plants

Abstract

The invention provides a priority management system of a nuclear power plant; the priority management system of the nuclear power plant is mainly used for managing instruction priorities and interfaces among a digital instrument control system and other systems of the nuclear power plant and driving devices of engineered safety facilities; the priority management system is used for directly receiving instructions from an engineered safety driving cabinet ESFAC, a safety related control cabinet SRC, a diversified driving control cabinet DAC, a serious accident control cabinet SAC and a power plant standard automatic system PSAS in a hard wiring manner, collecting feedback information of a field executor, supporting a self-diagnostic function and a periodic test of a safety system, and transmitting the feedback information, a self-diagnostic result, a quantitative test result and the like of the field executor to a DCS (Data Communication System) of the nuclear power plant; the priority logic part of the priority management system is in the form of a logic circuit; therefore, the priority management system is completely different from the DCS; and thus, software common-cause failures can be effectively avoided.

Description

Technical field [0001] The invention belongs to the technical field of nuclear power plant safety control, and particularly relates to a nuclear power plant priority management system. Background technique [0002] The priority management system is the interface module of the nuclear power plant DCS control system (distributed control system) and field equipment. It is the final output management part of the DCS control system and is a part of the safety-level DCS control protection system. The drive devices of nuclear power plant field equipment (such as electrical switch panels, solenoid valves) require multiple systems (such as protection systems, diversity systems, post-serious accident systems, power plant standard automation systems, etc.) to be controlled, in order to ensure that the drive devices are in a safe position State, the priority management system needs to manage the drive instructions from different systems, and define the priority relationship of these instruct...

AI Technical Summary

Problems solved by technology

The design of PIF card and AV42 board adopts the design form of processor and programmable logic device PLD. Although the priority management module is implemented by PLD (hardware mode), the function of receiving DCS instructions adopts the form of communication, which is the processor The software function does not explain the effective avoidance of software common cause failures with the DCS system; at the same time, the self-diagnosis coverage of the AV42 board is low, and at the same time, the support for the regular test function of the safety-level system is not high; the PIF card There is a high degree of support for the regular test of the safety system, but for the intelligent actuator with a fast response time, the disturbance of the intelligent actuator will be caused during the test, that is, there are special requirements for the selection of the actuator

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