nn a G,. 57 RADIOLOGICAL CONTROL, MONITORING AND DECONTAMINATION Radiol6gical decontamination was of primary importance in all Joint Task Force and Air Task Group planning. An allowable dosage of 3.9 r was set for all Joint Task Force SEVEN personnel other than those involved in special missions in which sampling was included. The Air Task Group planned to expose its pilots to 12 r during the entire operation and hoped to use them for three to four cloud sampling missions. Sampler pilots assigned to Task Group 7.4 who were expected to take part in future atomic tests were to be limited to 7.5 vr for CASTLE, sampling effort. A maximum exposure of 20 r was to be allowed for the If necessary, B-36 maintenance personnel were to be permitted an increased allowable radiation dosage up to 7.8 r. In its Final Report,” LASL stated that the then-current maximum permissible exposure of 3.9 r per thirteen-week period was not realistic in consideration of the heavy work loads in extensively contaminated areas. The use of vaivers to cover exposures in excess of 3.9 r became a needless routine without much significance when operations were conducted in large contamination areas with short shot intervals. Matiy people exceed- ed the 3.9 r, but very few exceeded 6.0 r. Three factors determined the aircrew dosage on each of the sampling missions: the time of penetration with relation to time of detonation; the time spent in or near the cloud; and the time spent in each contaminated aircraft in returning to the base. A sampler entering the cloud two to three hours after the detonation would be normally flying in a radiation field of approximately 60 to 120 roentgens per hour, Radia- tion of this intensity limited the aircraft's penetration of the cloud AEWI/HO Wa f