4.1.1
Overall supervisor must keep constant watch
to see that personnel do not inadvertently
remain for long times close to high inten-
sity sources of radiation such as filter
units, "cave" with filter paper in it, box
with empty filter holders and scrap safety
wire, or filled pigs on trailer number three,
He must monitor positions of personnel relative
to each other and their handling of removal
tools so that "hot" tools do not accidently
touch personnel, He must insure that casual
observer personnel do not get in way of
removal operations, In case of accident or
equipment failure, supervisor mist determine
appropriate action to be taken, Caution:
In no case is it permissable for personnel
to use their hands (even protected by leather
palmed gloves) to restrain or maneuver "hot"
filter paper,
4.2
Information,
2.1 A single filter paper from a B-57B aircraft
may frequently have a gamma radiation intensity
of 100 rfhr at one foot.
At 25 feet the back~
ground radiation intensity from this source
alone will be approximately 0.5 r/hr,
Distances
from aircraft for trailer and for personnel
positions mst be chosen as compromise between
high background radiation and time required for
critical operations such as carrying the filter
in filter holder from airplane to cave, The
success of removal operations as described
above represents compromises between protection
by shielding or by distance from source and
time required to perform operations swiftly
and safely, The basic philosophy underlying
this operation, as for other phases of sampling,
-
is that radiation exposures will be held to the
minimum practicable to accomplish the job.
In general, Los Alamos scientists held that once experienced personnel were
transferred or disbanded, the task for rebuilding a sampling unit would be
difficult if testing resumed after sporadic periods,
“unique and existed for highly specified conditions,
225
AFWUt
The function was
Of necessity, many
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