..:.... ............:....: :..”J .... ...... . .. .. .. . . FRC states that the operational mechanism described used. for application of criteria to limit the whole body dose for individuals to O. 5 rem per year and to limit exposure of a suitable sample of the population to O. 17 rem per year is likely to assure that the gonadal exposure guide will not be exceeded. (“ “me child, infant, and unborn infant are identified as being more sensitive to radiation than the adult. Exposures to be compared with the guidance are to be derived for the most sensitive members \ The guide for the individual applies when inin the population. i dividual exposures are known; otherlvis e, the guide for a suitable sample (one-third the guide for the individual) is to be used. This operational techpique may be modified to meet special situations. ...... ... . . ..... -.-... ..... — The FRC primary numerical guides, expressed in rem, are in protided in isvo reports, FRC SOS. 1 and 2, summarized numerical guides developed by FRC are Table I. Secondary expressed in terms of daily inta’~e of specific r=dionuc~des Conside~ation is given corresponding to the annual RPG’s. to all radio nuclides through all pathways to derive a total However, annual exposure for comparison with FRC guides. relatively few radio nuclides yield many practical situations, by comparison, maj~r-contribution to total esposure;from others are very for the