n APH:sow Srewhtaty , gs wi ponded to 3.5 r/hr fall-out at H+2 br, Use Because of small particle size this fall-out was much more diffi. eee cult to decontaminate than the macroscopic particles o 4 we Secondary fall-out levelled off between O700 - O800M, R+2. Maximum levels were 20_to 45 mr/hr, Lagoon contamination covered levels oe a) = eastern quarter of the lagoon wit, ae comparable to those aa Lagoon flushing through the southwest passage materially imtfeased background radiation levela in the vicinity of Ourukaen, Bokoaetokutoku, and Bokororyuru. 2 3 3 >. mumps) 2 - A partial Rad-Safe survey was conducted on with incomplete atoll results. “Results of this surv Day = id inditate = that Bokobyaadaa, Namu, Eniirikku, Bikini, and the Yurochi-Aomoen. chain were materially contaminated. Reentry and recovery were accomplished to a large degree on shot day. No secondary fall-out was detected as results of this shot. Lagoon contamination was restricted to a V-shaped pattern with apex at Eninman and tips covering the Bokobyaadea-Aomoen area. A reading of 100 mr/hr was obtained over the Eninman anchorage at H+4 hr. Enyu anchorage was clear of contamination while Bikini anchorage showed tracpm of contamination at H+ hr. + Th saibioiles «..:-. was materially different from that ~- in that radiation levels within the crater were dependent on "shine" from the lip of the crater and surrounding "sand dunes." wih alellUa Ve "yet the Bikini-Enyu sequence of islands. No material secondary fall-out was encountered at Bikini as a result of this detonation. re iit ort [eres AsareBla orag byA bsa Raed hy eagee OE PEPES ets, mt val ike cass, koe Wye t inNN LT Ie \Fly tn MEA \ i A demage and radiation survey was conducted on Day. This survey covered the eastern and northern islands of the atoll and was conclusive enough to limit reent Bikini, and Airukiiji on the first day. The survey on day indicated that recontamination was limited to the Yurochi-Aomoen and ment. Lagoon water was materially contaminated with radioactive sediReadings of 4.2 r/hr were obtained at an altitude of 500 ft 116 Copled/DOE LANL, J-Dly, me mr/pr, and Bairoko - 30 mr/hr, Ainsworth - 8 mr/hr, Estes ~- 12 ac Pa mt! dual topside levels on ships were: Res4- 7 iG “Fy :