Mr. Dixy Lee Ray Pape 4 April 17, 1974 in comprehending risks from backeround radiation. In any case, we believe that it is vitally important to state the risks, however, small, from low dosage radiation, sible to the Bikini people. lief, in a manner that is comprehen- We are sure that you share this be- and that the AEC will have constructive ideas as to how to present sophisticated concepts of radiation to a non-technological society such as the Bikini people. We ‘realize that the above request to state the risks of low dosage radiation in a meaningful manner intrudes somewhat into the controversial areca surrounding the threshold or no threshold debate. ive do not suggest that we accept or reject cither theory. However, as stated by the National Council or Radiation Protection and Measurements, ". . . prudence demands that, even though unproven, the no threshold concept should be used for estimating the maxinun deleterious effects of ionizing radiation." (Basic Radiation Protection Criteria, p. 58) What we are saying is that although it may not be standard AEC volicy, for the purpose of evaluating and Stating the risks to the Bikinians, the AEC should assume the nothreshold theory. At the very least, we reauest that you evaluate the risks using both threshold and no threshold assumnticns. A number of Kili people may be able to return permanently to Bikini We do not believe that their return is -in the next month or so. contingent upon receipt of the information requested in this letter. Nevertheless, it would seem appropriate that a response he prepared as soon as possible. We look forward to receipt of the AEC evaluation of the concerns expressed above. Sincerely, HAMLET J. BARRY ,Iif THEODORE R. MITCHELL By: xc: -- Hamlet J. Distad Marshalls TT Environmental Protection Board U.N. Trusteeship Council ‘Ataji Balos “Ralph Waltz . res Roger Ray HJBILI:bm 5009517 (Le fil CLOT ove E- Barry, . ”

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