-13- The ICRP dose limits for individual members of the public are in Table I. is given. No maximum "somatically significant" dose for a population Using the linear dose-effect relationship and assuming no threshold, the ICRP indicates that an annual exposure of active red Marrow, averaged over each individual in the population, of 0.5 rem (corresponding to the annual dose limit for members of the public) might at equilibrium lead to an increased incidence of leukemia, at . co most, of about ten cases per year per million persons exposed. . The genetic dose to the population should be kept to the minimum amount consistent with necessity and should certainly not exceed 5 rems ee in 30 years from all sources other than natural background and medical or procedures. fe disproportionate share of the total of the recommended dose limit. \ For exposures from uncontrolled sourced?e-g., following an acci- No single type of population exposure should take up a dent, ICRP identifies the term "action levels." The setting of action levels for particular circumstances is considered to be the responsibility of national authorities. SK ee apSee I 4 i pee . . Se Lorre rye wl? Torn Bolle I — Meee eeeee eee ne nee eg ee re haa an Sl. “tp a Te Oe aoe ae, So, . Tas, ‘ : Pon woot 2 a