not fully understood.
At Station 212.05 the 10-r thermal and blast exposures were the result
of residual contamination from Shot Zuni. Film indicated about! “{nitial exposure, and quartz-
fiber dosimeters indicated about!
_ The switches in the mechanical drop devices at Stations
213.02, 213.03, and 213.04 funct foned, but the dosimeters did not fall below the surface because
of a constriction in the pipes.
Table 3.6 and Figure 3.1 give results from the quartz-fiber rate devices for exposure versus
time.
The rate device at Station 211.01 did not drop; therefore it was necessary to subtract the
residual exposure of /
, At Station 210.02, it was assumed that the
that arrived after
15 seconds was residual since the shielding was only 90 percent effective.”The device at Station
100
.
°
|
@ Station 211.01 Flathead
© Station 20.02 Flathead
®
°
a
s
ww
°
e
ty
o
2
c
©
oO
he
o
o.
=
4
30
—_——
4
=
+
=
o__|
°
l
2
4
L
6
|
8
Time After
|
10
I
12
|
14
|
16
1
18
|
20
Shot , seconds
Figure 3.1 Initial-gamma exposure versus time for quartz
fiber rate device.
212.04 operated in reverse, yielding only total residual information. The exposure at Station
211,03 was small and could not be resolved properly.
Table 3.7 lists installation, recovery, and residual exposure information. Project 2.2 infor-
mation indicated that Stations 210.23 to 210.41 received about{ 6ffallout exposure from this
shot, the remainder having come from Shot Zuni.
L. a
3.5 SHOT DAKOTA
Tables 3.8 and 3.9 list instrumentation and recovery and initial exposure, respectively, for
Shot Dakota. High residual-gamma exposure rates resulted from Shot Flathead at the time of
the Shot Dakota instrumentation. Therefore, it was necessary to keep the instrumentation to a
minimum. The project was not aware of the change in shot coordinates at the time of instrumentation, and since the shot was moaved about Y, mile closer to the Fox complex, the lowest
initial exposure recorded was about —
-)
Dosimeters were placed in two locations on Man-Made Island No. 3 prior to Shot Flathead.
One group of dosimeters was found during Flathead recovery, and the second group was recovered
after Shot Dakota. A Shot Dakota data point was obtained by subtracting the Shot Flathead exposure.
3.6 SHOT NAVAJO
Tables 3.10, 3.11, and 3.12 list instrumentation and recovery, initial-gamma exposure, and
residual exposure, respectively, for Shot Navajo.
33
Some phenomenon, perhaps the shock, caused
fy.52 delesed.