ORNL-1771 - Oak Ridge National Laboratory

ANP QUARTERLY PROGRESS REPORT
Fig. 9.4. Motor Irradiated in the First Test.
In the second test the motor operated as long as
it would be expected to under normal conditions,
However, postirradiation inspection showed that
the commutator segments had been loosened as a
result of the deterioration of the plastic commutator
segment spacers under irradiation (Fig. 9.5). The
bearing grease proved to be adequate and WQS
essentially unaffected, as evidenced by the constant
power demand by the motor at constant rpm. The
RPM coil also showed no resistance change or
visible breakdown (Fig. 9.6). The brush wear
appeared to be normal. A high-temperature motor
is being constructed for testing that will have
g lass-insu loted-w ire, m ica, and h ig h-a It i tude
brushes.
WEMQVAL OF XENON FROM FUSED FLUORIDES
M. T. Robinson G. 14’. Keilholtz
Solid State Division
D. E. Guss
United States Air Force
W. A. Brooksbank
Anatytical Chemistry Division
A program has been initiated to study removal of
Xe13’ from fluoride fuels by means of helium
140
c
Fig. 9.5. Ccornniwtator Segments from Motor Ir-
radiated in the Second Test.
purging. A stainless steel capsule will be con-
structed in CJ manner that will allow bubbles of
helium to pass through a filter plate arid through
the fissioning fuel in hole HB-3 of the LITR.
Plastic mockups of the capsule are being used to
study the characteristics of the helium flow. A
four-channe! gamma-ray spectrometer has been
constructed by the Instrument Department to monitor
the Xe135 concentration in the flowing stream of
helium.
C 7 F 1 ,-U F6 1R R A Dl AT ION
W. E, Browning G. W. Keilhoitz
Solid State Division
An experiment is being conducted to determine
in a very rough fashion the effect of pile irradiation
on a 20% solution of UF, in C,F,. This material
is of interest tathe ShieldingSection of the Physics
Division for simulating liquid fuels in dynamic
shielding experiments, and the experiment is being
conducted with the aid of personnel from that