a
3S
a
o
a
|
AREA OF HEAVY FALLOUT
Lo
F
Dn
DISTANCE FROM BURST POINT (statute miles)
150
4
N
50
0
50
100
150
200
250
DISTANCE FROM BURST POINT (statute miles)
Figure 90.
R/hr
CASTLE, YANKEE heavy fallout area.
(and increasing) were noted.
procedures.
The area
within the contour would have been a full radex
area 24 hours after the shot had the fallout
been over dry land (after Reference 81).
The LSTs carried out decontamination
At 1700, readings averaged 0.020 R/hr
with the highest readings on wind-exposed surfaces.
at 2000 was 13°16 'N, 177°97'E.
(0.040 R/hr maximum),
The ships’ position
A steady decrease in radiation intensity
was noted after 2330, and decontamination continued throughout the night.
LST-762 reported a maximum of 0.040 R/hr; LST-975, 0.096 R/hr.
By 0800 on
7 May (position 14°30'N, 178°40'E), intensities had dropped to an average
of 0.005 R/hr and a maximum of 0.015 R/hr.
At 0700 on 8 May at position
15°5'N, 178°44'E, LST-762 indicated an average of 0.003 R/hr and a maximum
of 0.008 R/hr; LST-975 reported 0.007 and 0.010 R/hr, respectively.
No individual exposures are available for this incident.
It is not
clear whether the cumulative exposures reported for the crew of LST-762
and reported in Reference 13 included this radiation, or whether the
ship's film badges had been given to TU 7 for processing before the ship
departed Enewetak.
309