Application of dose limits

The operating organization of the nuclear power plant is required to ensure that doses conform to the dose limits specified by the regulatory body in respect of the exposure of workers and of members of the public (Ref. [2], paras 1.4 and III.2). These dose limits should be in accordance with those specified in Schedule II of the BSS. Guidance on how to verify compliance with the dose limits for workers is given in the Safety Guide on Occupational Radiation Protection [6]. 

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On the one hand, for the practice, what is intended to be controlled is the increase in exposure caused by the introduction of the practice, above the background level of radiation. Public dose limits and other relevant numerical standards applicable to practices refer to incremental dose values, a delta - not an absolute value - above the backgroimd level. Intervention, on the other hand, deals with the reduction of a de facto existing level of radiation. Application of dose limits, constraints and other design restrictions have no meaning in the field of intervention. 

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