Quantitative relationship among area of relocation and intervention level of dose and source term

Relocation is one of the important countermeasures which can be introduced to protect the public from high health risks in the event of major nuclear accidents. Extensive parameter studies have been performed with the program package COSYMA for probabilistic accident consequence assessments to quantify by means of PRA methods the relationship among area of relocation, intervention level of dose for relocation and source term of release. In order to estimate the possible limitation on the general application of the results obtained in the paper, sensitivity analysis has been conducted for the key parameters of a source term. The findings of this study are useful for establishing reasonable strategy of taking relocation