SLIDE 61 Return to Bikini. The ratio of total internal committed effective. dose equivalent to external dose equivalent was plotted by us versus time of return relative to the BRAVO detonation. It is apparent to us that the ratio increases with increasing time post return. In general, the ratio at Bikini Island would be about 2.5 if return in 2020 is hypothesized. From 2020 to 2050, we estimate an external whole body dose equivalent if 0.015 Sv (1.5 rem). The total estimate of internal plus external dose equivalent would be about 0.05 Sv (5 rem) for this 30 year period. Therefore, an unrestricted rehabitation of Bikini Atoll might begin in 2020 if their enygroment is not cleaned-up. This dose equivalent estimate is exclusive of Pu dose equivalent. 1 | | , 9 _ a wa BIKINI 5 WB = = S WTR ud 3 / <q @ ul / ELSE 5 = / ql4r z / / / / / / 7 “ “ => 4 . 4 @ RONGELAP _ / EZ13 |/ Le °° = | _ =12b | < 2 | Lt l 4 @® UTIRIK i I 5 id TIME BETWEEN CONTAMINATION AND REHABITATION, YEARS | 15 14%