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