Nuclear emergency unit state diagnosis and accident consequence comprehensive assessment method

Abstract

The invention belongs to the emergency technology field of nuclear power plants of millions of kilowatts and provides a nuclear emergency unit state diagnosis and accident consequence comprehensive assessment method. According to the method, a nuclear emergency unit is divided into N rings from inside to outside from a reactor core. The method includes the following steps that: whether the secondring breaks is judged, and if the second ring breaks, a next step is executed, otherwise, monitoring is strengthened; whether the breakage occurs in a containment is judged, if the breakage occurs inthe containment, a next step is executed, otherwise, whether the fourth ring to the N-th ring are abnormal is judged; whether abnormal leakage occurs on the third ring is further judged, if abnormal leakage occurs on the third ring, the fourth ring to the N-th ring are directly warned against an abnormality, and monitoring is strengthened; and if the abnormal leakage does not occurs on the third ring, attention is paid to the pressure parameters of the containment until the pressure of the containment reaches a preset value, the leak rate of the containment is set, and from this movement, a warning is given about the abnormality of the fourth ring to the N-th ring, and at the same time, monitoring is strengthened. With the method of the invention adopted, multi-ring joint derivation is realized, automatic error correction can be realized after one ring or a plurality of rings are wrongly misdiagnosed, and therefore, the analysis and early warning of the consequences of nuclear accidents can be greatly enhanced.

Description

technical field [0001] The invention belongs to the emergency technical field of mega-kilowatt nuclear power plants, and in particular relates to a comprehensive evaluation method for state diagnosis and accident consequences of nuclear emergency units. Background technique [0002] In the existing technology, the state diagnosis and comprehensive assessment of accident consequences of PWR nuclear power plant units are only partially assessed from their respective levels, and the assessment results are relatively one-sided, with certain limitations, and cannot effectively analyze and warn the consequences of nuclear accidents , and thus cannot guarantee the safe and stable operation of the pressurized water reactor nuclear power plant unit. Contents of the invention [0003] The purpose of the present invention is to provide a comprehensive evaluation method for state diagnosis and accident consequences of nuclear emergency units, aiming to solve the problem of the state d...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a comprehensive evaluation method for state diagnosis and accident consequences of nuclear emergency units, aiming to solve the problem of the state diagnosis and comprehensive evaluation of accident consequences of pressurized water reactor nuclear power plant units in the prior art. technical issues that have limitations in the evaluation of

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