-+ . .. .. . ............. ...... --) ........... .... the term “action level” is recommended. In general it will be appropriate to institute countermeasures only when their social cost and risk will be less than those resulting Setting of action levels is the responsibility from the exposure. of national authorities. members of the public to doses as It is not desirable to expos e high as those considered to be acceptable for radiation workers members of the public do not because children are involved, of the public are make the choice to be expo seal, and members supervision and monitoring, and are not subject to selection, For planning exposed to the risks of their own occupations. dose limits for members of the public are set a purposes, factor of ten below those for radiation workers. .... ......... - The ICRP dose limits for indi~idual members of the public are presented in Table II. NTOmaximum “somatically significant” dose for a population is given. The genetic dose to the population should be kept to the minimum amount consistent with necessity and should not exceed 5 reins in 30 years from all sources other N-O single type than natural background and medical procedures. of population expo sure should take up a disproportionate share of the total of the recommended dose iimit. TABLE ICRP DOSE II LIMITS 1/ – Population Individuals .. . .......... .. ....... . ... ..... .......... ... ............. ..... ... . .......... Gonads, red bone-marrow O. 5 rem/yr Skin, bone, thyroid 3.0 rems/yr Hands and forearms; feet and ankles 7.5 rems/yr Other 1.5 rems/yr single organs 2/ – - 3/ – Genetic dose ~/ For conditions ~1 1.5 rems/yr ~/ See paragraphs 5 rems/30 and qualifications to thyroid of children 84, and 86, 85, III-4 see ICRP Publication up to 16 years ICRP Publication 9. of age. 9. yrs