A method and system for simulating a safety injection system of a nuclear power plant based on risk guidance

Abstract

The invention discloses a method and system for simulating the safety injection system of a nuclear power plant based on risk guidance. The method of the invention identifies the minimum cut set of the functional requirements of the safety injection system through determinism, and determines the realization principle, system setting and operation of the safety injection system Methods: Identify the weak links of the safety injection system through probability theory, determine the importance of different design schemes of the safety injection system to the safety of nuclear power plants, and propose optimization suggestions for the system combination in the design of the safety injection system. The present invention integrates the analysis of determinism and probability theory to form a set of safety injection system design method oriented by risk guidance, realizes the goal of minimizing safety injection system settings and maximizing safety performance, and further optimizes while ensuring the safety of nuclear power plants The cost of building a nuclear power plant.

Description

technical field [0001] The invention relates to the technical field of nuclear power plant safety design, in particular to a method and system for simulating a safety injection system of a nuclear power plant based on risk guidance. Background technique [0002] After the reactor coolant pipe breach accident condition (LOCA) occurred in the pressurized water reactor nuclear power plant, the reactor coolant was lost from the pressure vessel, which caused the reactor core fuel elements to lose coolant and burn out, further threatening the safety performance of the reactor; Or when the reactor rod control system fails to function, the power of the core fuel elements is too high and burned due to the loss of reactivity control, which further threatens the safety performance of the reactor. Therefore, it is necessary to set up a safety injection system for core reactivity control and LOCA accidents, to deal with the core reactivity control when the rod control system cannot be ad...

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Problems solved by technology

[0003] The design of the traditional safety injection system is mainly based on the cognition of determinism. According to the requirements of the safe injection water volume of the LOCA accident and the boron concentration requirement of the main steam pipe rupture accident under thermal shutdown, the design requirements of the safety injection system are put forward, but the safety injection is not considered. The optimal configuration of the system, so the safety injection system designed by the existing design method cannot achieve the maximum function and the optimal setting

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