A fatal accident disposal for improved type gigawatt-level PWR nuclear power plant

Abstract

The invention is suitable for the implementation field of accident management in a nuclear power station and a method of settling a severe accident for an improved 1000MW class PWR nuclear power station is provided. The method comprises the following steps of: reading measured data of the nuclear power station in a severe accident condition and judging the severity degree of the accident according to the data; determining the execution sequence for the diagnosis tree of the accident condition in a severe accident management guidance and the logical sequence for the condition of accident diagnosis in the diagnosis tree of accident condition according to the severity degree of the accident; entering the corresponded diagnosis tree of the accident condition according to the severity degree of the accident and diagnosing the accident according to the condition of the accident diagnosis in the diagnosis tree of the accident condition and entering the corresponded accident management guidance. Through the judgment of the severity of the accident and according to the diagnosis tree of the accident condition, the invention diagnoses and settles the accident with symptom as the guide and with pertinence, thereby realizing efficient, quick and correct judgment and settlement of the accident when the accident happens.

Description

technical field [0001] The invention belongs to the implementation field of nuclear power plant accident handling, and in particular relates to an improved method for handling severe accidents of a million-kilowatt pressurized water reactor nuclear power plant. Background technique [0002] As we all know, the events and accidents of PWR nuclear power plants can be divided into two categories: The first category is the normal operating conditions defined by the emergency shutdown of the reactor. Specifically, for such accident conditions, the technical specifications require that the plant be able to reach a certain fallback mode, where some equipment is not available due to failure. For such events and accidents, the priority should be the integrity of the safety barrier, that is, to ensure the integrity of the core and to prevent damage to the core; the second category is severe accidents, which refer to the failure of a large area of ​​the nuclear reactor core fuel claddi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide an improved treatment method for severe accidents in million-kilowatt pressurized water reactor nuclear power plants, aiming to solve the problem that there is no set of comprehensive accident coverage, strong pertinence, and comprehensive disposal countermeasures for serious accidents in China , Complete, Logical, and Executable Guidelines for the Management of Severe Accidents in the Improved 1000-kilowatt Pressurized Water Reactor Nuclear Power Plant

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