3. Little lagoon contamination should result from the deep water surface shot. Something on the order of 10% of the total radioe activity from the remainder of the shots should eventually be deposited in the lagoon. Using this assumption, a 200 KT shot should give about thesame results as Bikini BAKER; or 2 UT about five tines 3AicR, etc. Thefollowing BAKER results are presented for cocparison: ™* Dinensio Tine After Explosion (hours) Sxposure _ Rates of Contaminated Contaninat Yean Olameter Are (miles) Vaximuc Exposur Rata (r day) 4 16.6 4.6 75 38 18.4 68 Lo 62 LB.6 7.9 5 86 4.8 8.9 i 100 70.6 9.5 0.6 430 107.0 11.7 0.2 200 166.0 4.3 C.c1 b. No health hasard should exist after any shot; tne princisal adverse effect should be limited to an operational nuisance. Freon tne above SAXZR results, cone could expect to operate in the lagoon at tne end of 24 hours for reasonable lengths of tine, with the situation rapidly improving daily. ec. -«fter a verind of a faw days, diffusion and currents should d. Reduction in the intensity of radiation in the watur snowld have spresé contamination frou tae shut sites to Bll paris cr “ne .agoon. take place at @ rate governed by at lesst 1/T¢, with the probability tnat the rodustion will be more rapid (based 1/T for radioactive decay and lft for diffusion in the water). e. Critical ships and beste: CURTIS, LSD, LST, Au, .7F and emall craft of the boat pools. f. Residual contamination resulting from intako of lagoon water and discharge upon complution of its funstion (such as taxes place through conduasere) should leave little redloactivity except «nore trap ped in pipo fittings at bends in watar lines. It is expscted that such "hotespota” should not be hasardous and could be mrkod off for +so.stion; also, flushing occasionally with uncontaminated water snou-s “a.7 ’ ruaeve soma of the trapped sodiaont. Fe / | |