aa
to a later prriod of fall-out then expected,
For the next
event the cemera station will be turned on at a later hour
with more hope of success,
Ship Decontamination Studies
Adequate data have been obtained for the evaluation
of firehosing, hand-scrubbing and hot liquid jet cleaning in
the decontamination of naval ships.
A gross reduction of 82%
in the dose rate aboard the YAG-40 was obtained by use of
these methods.
No decontamination was required aboard the
YAG-39.
|
The radiological protective coating was not as
readily removable with the hot liquid jet as it had been during
laboratory scale tests.
developed.
An on-the-spot procedure was therefore
This procedure successfully removed from 90 to 95%
of the paint with a corresponding removal of 75 to 90% of
the radioactive contaminant itself.
An adjacent area not coated
with this paint, was decontaminated by means of the same
procedure and a resultant reduction of 40 to 60% of the radioactive level was obtained.
An additional reduction of 10% in the initial dose
rate aboard the YAG-40 was obtained by high pressure - high
temperature - high volume liquid jet cleaning of steel surfaces
and by surface removal of wood deckinz.
effectiveness was therefore 92%.
Total decontarination
The average final dose rate
throughout the weather surface of the ship was 52 mr/hr.
OPED /DOE
unt
Seen
ome
.
_..
69 UC