Basic differences in the methods used in ICRP Publications 2 and 30 to derive limits for the intakes of radionuclides by workers are discussed. Although the philosophy on dose limitation now adopted by the Commission has changed, this has resulted in only small changes in the limits on intake of radioactive materials. Much greater changes result from improved knowledge about radioactive decay schemes and the uptake and retention of radionuclides in body tissues. The limits on intake recommended in ICRP Publication 30, Part l, are about equally divided above or below the corresponding values given in ICRP Publication 2 and the geometric mean of all the ratios new/old is very close to unity, although in a few instances the values differ by an order of magnitude or more.
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J. Vennart (1981) studied this question.