ae.
PRIVACY ACT MATERIAL REMOVED
enter an area where the radiation intensity was greater than 100 or/hr.
Other tasks-in connection with the tests consisted of drone aircraft
monitoring and decontamination operations at Eniwetok, aircraft monitoring and personnel decontamination operations at Kwajalein, cloud
tracking operations until H plus 108 hours, instrument maintenance and
recalibration operations, preparation of medical dosimetric records
and compilation of mission reports,
Each monitor completed an average of two training flights with
his assigned crew prior to Peter X~ray Day.
The flights were extremely
valuable in that each monitor was able to work out radiological safety
procedures that, while adequate, would not hamper the primary mission.
Instrument performance data began to beaccumilated and as a result of
these data considerable changes became necessary in instrumentation
procedures,
Initial practice missions showed that altitudes of 10,000' or
higher had a definite effect on ion chanber type instruments.
In
general all ion chamber instruments, except the Beckman MX-6 Gamma
Survey Meter which had a sealed case, failed due to rupture of the ion
chamber.
This problem was solved by modificationof the instruments
to include an air hole in the chamber and by calibration of the
instrument at the altitude for which it was to be used. Capt AMMs
designed and supervised construction of an experimental instrument
pressure tank which operated off the radar pressurizing system of a
B-17 aircraft.
Tests showed this tank to be excellent and instruments
could be used in it without air calibration.
Section Ix
99
PRIVACY ACT MATERIAL REMOVED
ps