ORNL-1816 - the Molten Salt Energy Technologies Web Site

ANP QUARTERLY PROGRESS REPORT
kw at a pressure drop of 50 Ib, 10 kw at 5 Ib,
d 5 kw at approximately 1 Ib. Since the maximum
at removal required is expected to be no more
an 10 kw, the heat exchanger appears to be more
CREEP AND STRESS-CORROSION TESTS
avis J. C. Wilson
N. E. Hinkle
J. C. Zukas
Solid State Division
stress-corrosion apparatus described pre-
s has been bench tested. The design ap-
o be sound, and therefore a new rig is being
canned for insertion in the LITR. Temperature
control to within 52°F at 150OOF has been achieved
by using a Speedomax air-controller to drive the
that supplies the furnace power. Operation
riods of 500 hr has shown that, if sodium
distills out of the hot zone of the furnace, so little
sodium is lost that its effectiveness as a heat
'W. W. Davis et al., ANP Qwr. Prog. Rep. Sept. 10,
1954, ORNL-1771, p 142.
.t
transfer agent is not diminished. Welding of some t
joints has been poor, and therefore Dy-Chek is
being used in the inspection of all new welds.
The LITR Experiment Review Committee has ape
proved the apparatus for irradiat
necessary safety circuit for the LITR has been
completed.
In the bench tests the outside of t
was in air,rather than in sodium as it would be in
the in-pile apparatus. The tests were for periods
of 432 and 866 hr at 15OOOF and a stress of 1500
psi. The specimen exposed for the longer time
showed roughly twice as many voids per unit area
on the sides of the tube stressed in tension and
compression as there were on the sides at zero
stress. The maximum depth of voids was about
0.001 in. It was also noticed that the etching (or
perhaps staining) characteristics of the salt-metal
interface were not the same for the stressed and
unstressed regions when etched in aqua regia.
The reproducibility of the creep data obtained was
not good, and therefore the specimen shape has
been modified in order to concentrate more of the * .
Fig. 9.5. Sandwich-Type U0,-Stainless Steel Fuel Element After 29% Burnup in MTR
S Nize, 3p). 250X.
126
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