ADPEMBIX I
EXTERNAL GAMA DATA
During the operation four camma intensity readings daily
were taken at the populated off-site atolls utilizing a radiac
meter AN/PDR 27F, calibrated against a standard consisting »f 7
micrograms of Nadium.
Following each test hourly reedings were
taken for an interval of time dependent upon fallout forecasts,
wind conditions at and following test time, cloud tracking, and
readings obtained at the atolls. The attached tables and charts
show the weighted daily averages of these readings for the atolls
at which stations were maintained.
An estimated cumulative exposure of the population of
these atolls resulting from operation HAFDTACK has been computed
based on the meter readings. These exposures are tabulated and
are compared with a calculated 70 year dose in TARLE I. The
computation for these exposures are attacned, The two exposures
agree quite well when one considers that one is an infinite exposure.
In a further comparison, the indicated dose on the film-
badges exposed for the entire operation is also included.
TAPLE I,
ATOLL
COMULATIVE
WOTHO
142 mr
194 mr
RONGELAP
285 mr
469 or
393 mr
UJELANG
222 mr
251 mr
334 mr
UTIRIK
230 mr
399 mr
307 mr
PARRY IS,
2.605 pr
3.492 ir
-
CALCULATED
70 YEAK BOSE
FILM PADGE
DOSE
Badge Watermarked
/+
EXPOSURE