Nuclear power plant overhaul safety risk management tool development method

Abstract

The invention discloses a nuclear power plant overhaul safety risk management tool development method. The method comprises the following steps of 1, selecting a key safety function; 2, analyzing theoperation state of a power plant; 3, determining risk characterization; 4, establishing a safety function analysis tree; 5, establishing a system fault tree; and 6, creating a risk management guide rule. The method has the beneficial effects that (1) the method is provided for overhaul planners, so that the optimal time period for the system to quit operation is determined from the perspective ofnuclear safety, and the overhaul plan is optimized; (2) the method is provided for overhaul planners, and overhaul stages with high nuclear safety risks are systematically determined from the perspective of safety so as to make appropriate prevention measures and emergency plans; (3) an operator is helped to identify the nuclear safety risk in the overhaul period, and execute prevention measures and emergency plans under the condition of relatively high risk; and (4) the employee is helped to independently examine the overhaul plan from the perspective of nuclear safety.

Description

technical field [0001] The invention belongs to the field of nuclear safety risk management in overhaul of nuclear power plants, and particularly relates to the development of an overhaul nuclear safety risk management tool. This tool can be used to evaluate the degree of degradation of the nuclear power plant's defense-in-depth level and the risk of loss of key safety functions according to the power plant operation mode, system status, equipment failure, etc. Defense in depth or protect critical equipment to reduce risk. Background technique [0002] During the shutdown and overhaul of the nuclear power plant, due to the large amount of work to be performed, the centralized shutdown of system equipment, unreasonable work arrangements, personnel operation errors, and random failure of system equipment may affect the nuclear safety during the shutdown period. Therefore, the nuclear power plant overhaul should be Properly managed to ensure that nuclear safety is maintained. ...

AI Technical Summary

Problems solved by technology

The technical specifications limit the status of each safety system and equipment in a nuclear power plant in different operating modes, but the technical specifications generally give requirements for a single system, and cannot measure the risk of multiple systems or equipment being unavailable at the same time. Out of guidance

Although some technical specifications have made some simple regulations on multiple equipment failures, and some nuclear power plants have added other management requirements in addition to the technical specifications, but due to the complexity and diversity of nuclear power plant configurations, these regulations and management requirements It is not possible to systematically and effectively identify, measure and manage nuclear safety risks in power plant overhaul

Images