C. ‘lational Council on “Vadiation Protection and “{easurements* (NCNP) The IC. position is tuat the rational use of rautlation shoull conforn to levels of safety to users and the public which are at least as gtrincrent as those achieved for other powerful asents. Continuing and chronic exposure attributable to peaceful uses of ionizing radiation are assumel, Jos eT. epee gees { cea Tid SIRT Tans has ado,te.t cha assumption of no-thras iit luse-arfects £e rt yoy relationship and uses the term "dose linits"” in providing guidance on population exposures. practicable, All radiation exposures are to be kept as low as The numerical values of exposure as presented are to be interpreted as recommendations, not regulations. Use of the no-threshold concept involves t!.2 thesis that thera ts ne exposure linit free fron some degree of risk. To establish criteria, ‘ICRP uses the concept of "acceptable risk" (where the risk is compensated by a demonstrable benefit) broken dowm to fit classes of individuals or population groups exposed for various purposes to different quantities of radiation. ‘lumerical recommendations for dose limits are necessarily arbitrary because of their mixed technical valuejudgment foundation. The dose limits for individual members of the public and for the average population recommended by NCRP represent a level of risk considered to be so small compared with other hazards of life, and *Tormerly ‘“nown as the National Committee on Radiation Protection and ‘feasurenents.