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the last quarterly report,(') has been
started. A plan view oE the instal-
lation is shown in Fig. 7.7. The
animals are contained in watertight
cages that are lowered under water into
positioning frames on either side of
the reactor as shown. The cages are
located SO 5/8 in. from the center of
the reactor with 7 1/2 in. of lead
between the reactor and the cages.
The animal irradiation is done only
on the week end, and the reactor is
free to be moved forward or backward
for shielding experiments during the
week,
In cooperation with the Health
Physics Division, an extensive set of
'7'ANP Quar. Prog. Rep. Sept. 10, 1952. ORNL-
1375. p. 66.
~osimetry measurements in the cages
has been completed. The results will
be reported later.
OTHER EXPERIMENTS
A report on the results obtained
from the irradiation of electronic
equipwent has been issued.(*) The
experiment for determining the energy
"2 35
released per fission has been
completed, but the ea1 cu la tions have
not yet been finished. Because of low
priority on reactor time, no progress
has been made on measuring neutron
spectra or capture gamma-ray spectra.
(*)A. N, Good and W. T. Price. Effects of
Nuclear Radiation on Electronic Components and
Systems, WADC-TR-187 (Aug. 18, 1952).
TABLE 7.1. SPECTROMETER POSITIONS FOR GAMMA-RAY SPECTRAL MEASUREMENTS
WITH THE DIVIDED-SHIELD MOCKUP (WITH LEAD DISKS)
0
50
60
5, 10, 15, 20, 25, 30
0
0
0
0, 10, 20, 30, 40, 50
-20, -10, 0, +lo, +20, +30, +40,
+SO, +60, +70
-30, -20, -10, 0, +IO, +20, t30,
+40, +SO, t60, t70, +80
60
See footnote
~_____
"$ is the angle between the aircraft sxis and a line connecting the pseudo reactor center with the
nose of the spectrometer collimator.
**@ is the angle between the horizontal plane anda plane that includes the aircraft axis and thenost
of the spectrometer collimator.
***e is the angle between the spectrometer collimator and the line joining the pseudo reactorcsn t e r
and the nose of the spectrometer collimator.
92