Time-dependent estimates of dose to the critical group of fish and shellfish consumers near Sellafield

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Abstract
Data on concentrations of radionuclides in the marine environment near Sellafield have been used to estimate past, present and future doses to the critical group of local fish and shellfish consumers. Doses are compared with criteria recommended by the International Commission on Radiological Protection (ICRP); it is shown that, in the past, doses are likely to have been well within the subsidiary dose limit of 5 mSv y-1 for members of the public. Following the trend of liquid radioactive waste discharges, doses are currently reducing rapidly, and on the basis of measures already implemented at Sellafield, they will reduce to within the principal limit of 1 mSv y-1 even if consumption occurs at the highest rates observed in the past. Further measures planned to be effective by 1992 will reduce doses to well within these levels. Any potential lifetime members of the critical group are likely to receive less than 1 mSv y-1 on average.