SR peepee nr ae age CRERRO rm A meeeRene RRoS PIR on III O45 Aah te Personnel Dosimetry. Each member of the team will be provided one or more personnel dosimeters to be worn throughout the stay at Bikini Atoll. These devices will be processed at the first opportunity and records will be prepared showing the dose received and the itinerary of the individual wearing the dosimeters. Where practical, each member of the team will arrange for whole body counting for 137¢s prior to departure and again upon return. These measurements will be included in the records of measurements obtained by the team, Special Measurements. A return to Bikini Atoll will undoubtedly result in some modification of the radiation environment. It is desirable to take account of this fact in any estimates of exposures that may be received. For instance, the clearing of vegetation for a village site may have a significant effect upon external radiation levels in that area. Such vege- tation provides shielding against radiation from radioactivity in the environment. However, there may be a contribution to the external radiation field from radioactivity in the vegetation. | Measurements of gamma and beta-gamma radiation will be made at ground level and at three feet before and after removal of vegetation. These measurements will be made in conjunction with another study, based on agricultural considerations, to determine the weight of vegetation per unit area. Ideally it would be desirable to remove the vegetation in a large Nee circular area within the village site on Bikini Ax Island. From a practical viewpoint, the size of the cleared area will be determined by the physical chore ; ability of those who perform this And available equipment. A single area 2 akin } 3728) alos POW §