At Enewetak, TG 7.2 used an "electronic" radiation monitdr an ion chamber) coupled to an Esterline-Angus recorder. In (presumably addition, a cascade impactor driven by a Gast pump and an Electrolum sampler were in operation under the supervision of the TG 7.2 Radsafe Officer Specialized instrumentation (described on page 138) was ifstalled in the TG 7.4 sampler aircraft to alert pilots to both dose ratejJand cumulative dose. Three types of pocket dosimeter, the Victoreen (0 to 5 R)@ the Cam- bridge (0 to 1 R), and the Keleket (0 to 0.2 R)}, were used by were found to be unreliable. monitors but The dosimeters reportedly gave rbadings that were consistently high by a factor of two; of those used, 63 pkrcent either became inoperative or were lost (Reference 17, pp. 43~44). 7.3 com- C mented that about 15 percent of its pocket dosimeters would no hold a charge and generally proved to be “awkward and slow" in operatdon (Reference ll, p. 11b-1). No information has been found regarding the methods used tq calibrate the survey meters except for a paragraph in Reference 25 that iftdicates: 1. Some meters may not have been calibrated before use 60 226 2. The calibration may have been against Co or Ra 3. The low range on the AN/PDR-39 and the AN/PDR-TIB wa not calibrated. PERSONNEL FILM BADGES AND RECORDS. Personnel film badge doqgimetry em- ployed badges that combined two types of film to achieve an extdnded range of exposure readings. DuPont 502 provided low dose coverage, refsonably accurate between 0.1 R and 3.0 R and usable to about 10 R. DuPpnt 606, with a range of approximately 10 R to 300 R, ensured high dose c however, this particular combination of films had decreased accu the region of 10 R to 15 R. Both films were probably used in ev this range (Reference 17, p. 43). The initial plan was to badge "all personnel expected to recai nificant amounts of radiation... [and]... a representative 101