A comment on the assessment of internal dose to the total body from radionuclides incorporated into sea food

In the equations to assess the dose commitment from the consumption of sea food polluted with radionuclides, the absorption of the radionuclides from the gastrointestinal tract or the fraction of the radionuclides passing from the blood to the body organ of concern and the effective half-time in the organ are included as biological parameters. After summarizing briefly the effects on the parameters from amounts of the stable isotopes, the physico-chemical states in the sea food and the time of age and the duration in which the sea-life was in contact with the radionuclide, it is emphasized that the values of parameters in the equations are not constant but variable, especially in cases of some biologically important radionuclides. (author)