Judgment method for radioactive material transportation risk acceptability

Abstract

The invention belongs to the probability safety analysis technology, and in particular relates to a judgment method for radioactive material transportation risk acceptability. According to the method,the risk objective for each package is made in a classified way by constructing a risk matrix so as to determine the corresponding acceptable risk boundary. The composition of the risk matrix includes two dimensions, namely the radiation hazard consequence and the accident occurrence probability. The acceptability of the radioactive material transportation risk is classified and judged accordingto the severity of the radiation hazard consequence with combination of the accident occurrence probability. The proposal that the acceptable criteria (or objectives) applicable to the radioactive transportation risk should take the form of the risk matrix is put forward for the first time. A matrix framework for the acceptability criteria of the radioactive material transportation risk is finallyproposed based on the study of the dose threshold for the acceptability of the consequences of various radiation accidents in relevant standards at home and abroad and the division method of the expected value of the accident probability at home and abroad.

Description

technical field [0001] The invention belongs to probabilistic safety analysis technology, in particular to a method for judging the risk acceptability of radioactive material transportation. Background technique [0002] At present, for the risk management of nuclear facilities, many countries in the world have successively formulated some relevant criteria or target values ​​of acceptable risks through research. Especially in terms of nuclear power plants, the US Nuclear Regulatory Commission (NRC) took the lead in passing a large number of secondary PSA studies. In the 2001 research report SECY-01-0009, it gave the probabilistic safety goals of nuclear power plants, and proposed the operational safety goals of reactors for the first time. Should reach: [0003] ●The core failure frequency (CDF) of each reactor year is less than 10 -4 ; [0004] ●The radioactive large early release frequency (LERF) of each pile year is less than 10 -5 [0005] That is to say, the nucle...

AI Technical Summary

Problems solved by technology

On the one hand, it is due to the lack of reliable data basis, and more importantly, due to the lack of acceptable criteria for radioactive transport risks, it is difficult to make further decision-making judgments even if the corresponding risk level is given.

In addition, the probability of accidents of different severity levels for different types of radioactive cargo packages and their radiation consequences are very different, and it is not appropriate to simply apply the single probability safety goal of nuclear power plants.

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