( C , - 34 e oe we aa 12 of individual doses is not contemplated,Ose Actual doses received by individuals will vary according to age, size, metabolism, and customs, as well as variations in their environment. These variations are_said tomake it impossible to determine en the maximum individual doses. ~ ad Pa es Su! In practice it is feasible to take ™ account of these sources of variability by the selection of appropriate |, 7 critical groups within the population, provided the critical group is small enough to be homogeneous with respect to age, diet and those aspects of behavior that affect the doses received. Such a group should be representative of those individuals in the population expected ICRP believes that it will be reasonable to A The inate variability within an apparently homogeneous group means that some members of the critical group will receive doses somewhat At the very low levels of risk implied, the ‘ health consequence is likely to be minor whether the dose limit is marginally or substantially exceeded. Limitation of exposure of whole popuiations is achieved partly by limiting the individual doses and partly by limiting the number of persons exposed. Y It is of the utmost importance to avoid actions that may prove to be a serious hazard later, when correction may be impossible or costly. ¥y Ny. , ft Re ok oo . te ~— win Chae ae ' a ee oF vee La tse — peel . i wp ae] ett ate OU sear asey, ae ‘os $ ke . . 7a — 8 Ee ye. ‘ , : *y i ~ os cee a “ee Ne Core we te done ERY Rays7 A ” : ’ ‘| DOL ve ae f oor aed peeOe «wl ' * “CA ; eit Y cues, HA . er A ~ 6 af Lat a diauer ¢ w 209) / arrve wl . "ror : , - 8 coe } . aieation «4s rae He we META DS a‘ Tete HT asoP jPee _ eee wi EX seo { hegre Remreranar aie PES wk et cts |{poe re : ine higher than the dose limit. % dose of this group. ne eee apply the appropriate. dose limit for members of the public to the mean — —- to receive the highest dose. * py beg an ee! . et . “tp ~\ fe ~ an oe ~ ; ‘ wat eden joo :