H'cdacsday, May 18, 1960 FEDERAL REGISTER plies when the individual whole body duses are known, As an opcrational technique, where the Individual whole body doscs aie not known, a suitable anampic of the exposed population should be developed whose prolection Buide for annual whoie body duse will be 0.17 rem per capita per year. It is emphasized that this is an oprrational technique which should be modificd to meet speela] situations. . (2) Considerations of population re- _ netics impose a per capita dose hmivation for the gonads of 5 rems in 30 years. The operational mechanism described above for the annual individual whole body dose of 0.5 retn js likely in the immediate future to assure that the gomnadal exposure Guide (5 rem in 30 years) is not excecded. (3) These Guides do not differ substantially from certain other recori“mendations such as those made by the National Committee on Radiation Protection and Measurements, the National Academyof Sciences, anc the International Commission on Radiological Protection. (4) The term “maximum permissible on Radiation Protection (NCRP) and the Intemational Commission on Radiologica! Protection (ICRP). However, this term is often miusunderstond. The words “maximum” and “permissible” both have unfortunate connocations not intended by either the NCRP or the ICRP. (5) There can be no single permissible or acceptable level of exposure without regard to the reason for permitting the exposure, It should be general practice to reduce exposure Lo rac:ation, and pasitive effort should be carried out to fulfill the sense of these recommendations. It is basic that exposure to radiation should result from 2 rea) dewrmination of its necessity, (6) There can be different. Radintion Protection Guides with different numerical values, depending upon the circumstances. The Guides herein recommended are appropriate for normal peacetime operations. (7) These Guides are not intended to apply to radiation expesure resulting fron natural backeround or the purposeful exposure of patients by practitioners of the healings arts. (8) It §s recogniczed that our present scientific knowledse does not pravide a firm foundation within a factor ¢f two or three for selcchon of any parucular numeorica) value in preference to another \ value, It should be recosnized that the Radiation Protection Gindes reconmended in this paper are well below the level where biolosical damage has been observed in humans, It is recommended that: 4. Current protection guides used by the agencies be continued on an intern basis for orsan doses to the population, Recomnniendations are not nude coneerning the Radiation Protection Guides “ ~— (+ dose” is used by the Nationa] Committee for individual orgnn doses to the popu- Intion, other than the ponads. Unfortunately, Qhe complexities of establishing fuldes applicable to radiation expoiure of all body ornans preclude the Council from making reeommendntions concern- ™ ing them at this time. 41 However, current proteclion ruiucs used by the neencics appear appropriate on an interim basis. It is reconunended that: 5. The term “Radioactivity Concentration Guide” be adopted for Fuderal use. This term ts defined as the concentration of radioactivity {n the environment which is determined to result in whole body or orran doses cqua) to the Radiation Protection Guide. Within this definition, Radioactivity Concentration Guides can be determined aller the ladiavion Protection Guides are decided upon. Anygiven Radioac- tivity Concentration Guide is appbcable only for the circumstances under which the use of its correspondins Radiation Protection Guide is appropriate. Itis recommended that: 6. The Federal agencics, as an interim measure, use radioactivity concentration guides which are consistent with the recominended Radiation Protection Guides. Where no Radiation Protection Guides are provicced, Federal agencies cont:nue Present practices. No specific numerical recommendations for Radioactivity Concentration. Guides are provided at this time. However, concentration guides now used by the agencies appear appropriate on an interim basis. Where appropriate radioactivity concentration fuices are not available, and where Radiation Protection Guides for specific organs are provided herein, the latter Guides can be used by the Federal! agcncies as a starting point for the derivation of radioactivity conceniration gundes applicable to their pariicular probiems. The Federal Radiation Council has also initiated action directed towards the development of additional protection. Guides : for radiation Ji is recommended that: i. The Federal agencies apply these Radiation Protection Guides with judgment and discretion, to assure th2t reasonable probability is achieved in the attainment of the desired coz) of protecting man from the undesirable effects of radiation. The Guides may be exceeded only after the Federal agency having jurisdiction over the matter has carefully considered the reason for doing so in light of the recommendations in this paper. The Radiation Protection Guides provide a general framework for the radiation pratection requircments. It is expected that each Federal asency, by viriue of its immediate knowlcdse of its operating problems, wid use these Guides o£ a basis upon which to develop detailed Standards tailored to mect ifs particular requirements, The Council will follow the activili¢s of the Federal agencies in this aren and will promote the necessary coordination to achieve an effecuve Federal pragrain, ‘ If the forezoing recommendations are approved by you for the pruidance of Federal agencies in the conduct of their radiation protection activities, it ls further recomended that this memorandum be published in the Fepenan Recister. Aumior 5S. FLramina, 5011513 Chairman, Federal ficcietion Council, The recommendations numbercs ': throurh “7" memorandum contained are in the uappreves or 2:° Guidance of Federal agencies, anc * memorandum shall be pubishea us... FEDERAL REGISTER. DwicnuT D. E1senrowrs May 13, 1960. [F-R. Doc. 60-4539: Filed, May 17, 157° 8:51 am.)