Each cover was secured in a rolled-up position by a short length of
nickelechromium (n-c) wire. Release of the spring tension
maintained by this wire was controlled by a battery operated, alarm
clock timing mechanism which, at a predetermined time, applied an
overload current to the wire. This fused the wire which in turn
released the springs and permitted the cover to close over the face
of the panel. Unfortunately, the long delay which occurred between
the time of set+ting of the clock mechanism and the firing of the shot
so depleted the battery that insufficient current remained to actuate
the fusing mechanism, No attempt was made to use the weather covers
following this experience on Shot 2.
2.204
Decontamination Stands
After recovery, the contaminated panels were mounted on simple
2 in. x k in. wood stands at the Parry Island decontamination area,
ready for decontamination operations. During Shot 2 decontamination
operations, it was found that the ground underneath the panels became
Significantly contaminated.
Therefore, a drainage ditch for
contaminated run-off liquid was provided for all subsequent decontamination operations,
2.2.5
items:
Decontamination Apparatus
The apparatus for decontamination consisted of the following
1.
Pump, centrifugal, gasoline engine driven, Engineer Stock
#11-4619.240.100.
2. Vapor Clarkson Heavy Duty Cleaner, Model n-1992 with
Sellers Hi-Pressure Jet Clesner,.
°
- 3, Decontaminating ‘pparatus Power-Driven Truck-Mounted
M3A2, TM 3-223,
lh,
5.
2.2.6
Brush, GI scrub, with handle,
Detergent, household, trade name "Tide",
Radiological Instrumentation
The following radiological survey instruments were used:
1. Radiac Training Set AN-PDR/T1B
2. Beta Directional Instrument, NRDL Model RB1-12,
(This is
a light, self-contained, battery operated portable instrument with
ah in. x 4 in. window, which measures beta activity when placed
against a surface.
Four sensitivity ranges in decades provide
readings fron 0 to 20,000 microcuries.)
18
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