Federal Radiation Council (FRC) Basic FRC nunerical guidance and health protection philosophy are similar to those of the ICRP and NCRP. Radiation Protection Guides (RPG's) are provided which deal with exposures of individuals and of population groups. Actions are to be directed primarily toward controi of the sources of radioactivity to restrict entry into the environment but also toward control of radioactive materials after entry into the environment in order to limit intake by humans. The RPG's express the dose that should not be exceeded without careful consideration of the reasons for doing so. [Every effort snould be made to encourage the maintenance of radiation doses as far below this guide as practicable. The RPG's are intended for use with normal peacetine operations. There Suculd beitwe muncmude radiation cenpoocure wichoul enpeciution of benefits fron such exposure. Considering such benefits, exposure at the level of the R°G is considered as an acceptadle ris: for 2 lifetime. The RPG's for the population are expressed in terms of annual exposure, except for the gonads, wiere the ICR? recommended value of 5 rems in 39 years is used. FRC states that the operational mechanisn described for application of criteria to limit the whole body dose for individuals te 0.5 rei per year and to limit exposure of a suitable sanple of the population to 0.17 rem per year is likely to assure that the gonadal exposure guide will not be exceeded. The 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 in the population. guide for the individual applies when individual exposures are known; B21-02 The