TION i ne ONee SPAER AERO ne hyn TTF fe® Rao . oohiplets blood count, erythrocyte ie, ad uriralysis in accord» naval regulations. The find“nes. Of thee: saminations were to be recorded of Sinndaed Ferm @8 and in the health records of the man isvalved, Complete blood counts and urinalyses were to be accomplished at weekly inter vale and findings appropriately recorded. Follow-up physical examinations were to be conducted in accordance with naval regulations. The men were not permitted for the remainder of Operation Greenhouse to enter areas in which any radiological hazard existed. It is strongly suspected that a deliberate attempt was made to obtain a high exposure on the subject film badges, probably by leaving them on the shot island in a contaminated area for a considerable period of time, although none of the subject men would admit this. Certainly no other boat crew members operating under almost identical conditions obtained exposure within an order of magnitude of that obtained by the subject men. Additional study on the fall-out problem was done by Thomas N. White and Harry F. Schulte (see Sec. 2.6). Results of island surveys following Easy shot appear in Appendix B, and results of atoll surveys are given in Table 2.2. 2.4 GEORGE SHOT The radiological safety problem after George shot was much simpler than after Dog and Easy shots. The winds were ideal, being from the west-southwest throughout their entire structure, thus eliminating the immediate downwind fall-out hazard in the Atoll. No secondary fall- out was detected on the Atoll from George shot. A new procedure wasinitiated on this shot in that recovery operations were delayed until a radiological safety survey of the shot island was conducted. This survey was started about 14 hr after the detonation, and at noon, 23 hr . after the shot, a radiological safety clearance for proceeding with recovery operations was issued. Recovery operations were practically complete on 19 May 1951, and no significant or ex' cessive exposures had been reported. The res Ce ae te ee eee ..RyTHsding Hingerprints, 7... » Average.exposulsfor personnei of TU 3.1.5 was + nae OR te ORO 2 ete ee ee Orne ee tm ee tee ow eteerr eg Precio 2 ttle nine aoe about 700 mr pexshot. Film badge dais from 3,180 individuals as of 15 May showed an average radiation dose of 422 mr. If casual visitors were eliminated from the list, the average dose received by 2,236 persons was 600 mr: This does not include exposures from fall-out after Dog shot and the subsequent lighter fall-out from Easy shot. The cumulative dosage on Parry from fall-out as of 14 May 1951 was approximately 2,200 mr outof-doors. For further information concerning fall-out, see Secs. 2.6 and 2.7. A radiological survey made during the week of 7 to 14 May 1951 on Ujelang, Ponape, Bikini, Rongelap, Lae, Ujae, and Kwajalein showed no significant contamination. Water samples that were collected on these islands showed no significant activity. Results of island surveys following George shot appear in Appendix C, and results of atoll surveys are given in Table 2.3. 2.5 ITEM SHOT Item shot was fired at the usual predawn time. According to the latest meteorological reports, the winds were in a transition period, and it was evident that the probability of fallout on Parry and Eniwetok was borderline. It had been agreed that no recovery would be attempted until at least 3 hr following the shot, at which time a preliminary radiological survey would be made. However, owing to some changes made on the night before the test regarding air transportation, it became necessary to attempt an early recovery. Therefore, at H+30 min, Maj Gerald M. McDonnel, Dr. Howard L. Andrews, and Gen Cooney flew to Engebi by helicopter and landed near Building 69. Upon arrival, the radiation intensity was about 400 mr/hr outside Building 69. The building was opened, and radio and telephonic communications were established with the radiological safety building on Parry. Another radiological survey was then made around Building 69, and it was found that the intensity had risen to 1.2 r/hr. It was evident that a large-particle fall-out was in progress. As a matter of fact, the falling particles could be felt on the face and hands. Radio communication was established ate fee ra ee ote eT t Re a na et eer remnan e we Lae peA eI He mee we