Project 2,72 -— Evaluation of Standard Navy Dosimeters in Residual Radiation Fields Aboard Ship - ©, C. Rainey
OBJECTIVE
To determine whether or not the standard dosimeters DT-60/PD and
IM-107/PD read the biologically significant 3-5Sem depth dose when worn
aboard ships by personnel under atoric warfare conditions,
PROCEDURE
Nine man-sized masonite (unit density) phantoms were used,
These
were mounted on the YAG-39 and YAG-40, seven above decks and two below *
decks,
On the chest of each phartom, 10 DT-€0/PD's, 6 IM-107/PD's, 2
IM-93/UD's, and 2 NBS film badges were mounted,
mounted on the backs of the phantoms,
A similar array was
Depth dose configurations in
each phantom were determined by the use of small phosphate glass needles
at a number of depths through the pharntor,
a
These loaded phantoms accompanied the YAG's on their sorties for
ot
a (Tewa).
heer
Upon return of the ships to Fmiwetok, the dosimeters
and nes were removed, and the radiation doses were read,
RESULTS _
Depth dose configurations were obtaired from four phantoms,
Corparisons showed that the DT~60/PD readings on the surface of the
phantom read about 50% higher than the 3cm depth dose,
The quartz
fiber dosimeters (IM-107/PD and LM-93/UD) averaged nearly a factor of
two higher than the three centimeter depth dose,
averaged about 20% higher,
Con. FOOSE
' aN
RG
The film badges
Position variations in readirgs of the
U)