}wa DS S 0 te na Su b pu ew vi Re TANS 6O(V pparr | Hh U Oe t SS WSchroebel: 13 6/20/73 \ THE INTERNATIONAL COMMISSION ON RADIOLOGICAL PROTECTION oNCiGRP The ICRP originated in the Second International Congress of Radiology in 1928, It has been looked to as the appropriate body to give general guidance on widespread use of radiation sources caused by rapid developments in the field of nuclear energy. ICRP recommendations deal with the basic principles of radiation protection. . To the various national protection councils is left the responsibility for introducing the detailed technical regulations, recommendations, vier vinesor‘codes ofpractice best suited: ‘to:“‘their-countries.” ‘ Recommendations” “307-857 are intended to guide the experts responsible for radiation protection oT ae: practice. . 4 . ; . . . 2SyL Me EE RRO Guta tie Mr are oP Diet fred loket cee pe eb ease othe ICRP states that the objectives of radiation protection are to oc prevent acute radiation effects. and to limit the risks of -late effects - _ to an acceptable level. ! It holds that is unknown whether a threshold .:,,@kists, and.it. is assumed that even the smallest doses involve -@@.... s iis re, ey eT ae a proportionately small risk. : soe re tyes rn . we TN ats ethe Sob No practical alternative was found to assuming a linear relationship between dose and effect. This implies that there is no wholly ."safe" dose of radiation. Exposure afeem- natural background radiation carries a probability of causing some somatic or hereditary injury. However, the Commission believes that the risk resulting from exposures received from natural background should not affect the justification of an additional risk from man-made exposures. Accordingly, any dose limitations recommended by the Commission refer only to exposure resulting from technical ' ‘ aoe ~~”