Nuclear power plant fire accident safe shutdown path evaluation method

Abstract

The invention discloses a nuclear power plant fire accident safe shutdown path evaluation method comprising the following steps: identifying a system affecting a safety shutdown function, and buildinga safety shutdown path; identifying executed or influenced equipment according to the safe shutdown function; identifying and determining a cable of a device that affects safe shutdown; and carryingout circuit analysis and evaluation on the cable related to safe shutdown in the fireproof subarea. According to the nuclear power plant fire accident safe shutdown path evaluation method, the system,the equipment and the cable required by operation of each safe shutdown path in the nuclear power plant are identified, and the misoperation condition of the cable under the fire condition is considered; a measure for relieving the influence of a fire disaster on components of a safe shutdown path required by each fireproof partition or components possibly influencing the required safe shutdown path is provided for the nuclear power plant, so that the nuclear power plant reaches an acceptable safety level, and the safety design of the nuclear power plant is realized.

Description

technical field [0001] The invention belongs to the technical field of nuclear safety, and in particular relates to an evaluation method for a safety shutdown path of a nuclear power plant fire accident. Background technique [0002] The operating experience of nuclear power plants for decades has shown that fire is a major potential threat to the safety of nuclear power plants. A fire in a nuclear power plant will directly break through the layers of barriers set up by the deterministic accident analysis of nuclear power plants, causing reactive accidents, and will also cause serious economic losses and social impacts. [0003] In order to prevent fire accidents and extinguish fires in time, nuclear power plants have carried out systematic analysis and research on the impact of fire accidents on reactor shutdown during the design and operation process. [0004] As we all know, a nuclear power plant is an extremely complex system, and the operation of the reactor depends on...

AI Technical Summary

Problems solved by technology

Therefore, once the systems and equipment required for thermal shutdown of the unit are damaged due to fire, the shutdown of the unit will be seriously affected, thereby seriously affecting nuclear safety.

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