- 46 - f The MPLPB=0.2 particles implies that the existing MPCa for non-occupational exposure to Pu-239 should also be reduced by a factor of 115,000 to a value of 9x10718 uCi/ml unless it is determined that the plutonium is not in hot particles. Cc. Exposure from Accidental Releases There are no direct statements by standard-setting organi- zations regarding an “acceptable" exposure associated with release of radioactivity in an acciden +, 81 For purposes of evaluating sites for, nuclear reactors, establishing site boundaries, and preparing safety analysis reports, however, the AEC has adopted specific criteria. “The reactor site boundary (surrounding the exclusion area) must meet the following criteria (10 CFR 100.11(a)(1)): (1) An exclusion area of such size that an individual located at any point on its boundary for two hours immediately following onset of the postulated. fission product release would not receive a total radiation dose to the whole body in excess of 25 rem? or a total radiation dose —--- in excess of 300 rem? to the thyroid from iodine exposure. : : 81/ Fish, B.R., G.W. Keilhalte, W.S. Snyder, and S.D. Swisher, Chapter 7 of early draft version of B.R. Fish, et al, “Calculation of Doses Due to Accidental Released Plutonium from an LMFBR," ORNL-NSIC-74 (Nov. 1972), p. 128. This chaoter was deleted from the final version at the direction of AEC-Divisicn of Reactcr Development and Technology because it was judaed to be not directiy aprlicable to the objective of the study, anc the information base from which it was develovec was alresacavailable in other documents. AEC-DRET further stated thir it Was. not removec becaus2 ci the quality of the work. of Ly”