ORNL-2106 - the Molten Salt Energy Technologies Web Site

ANP PROJECT PROGRESS REPOR7
surface revealed no cracks or other flaws. X-ray
photographs taken through the shell wall and the
thick outer housing wall likewise did not indicate
cracks or flaws, but it is iudged that this inspection
technique was not sufficiently sensitive to
reveal hairline cracks, if such existed, on the
exterior surface of the core shell.
The internal contour of he shell was mapped by
centering the shell on a lathe and measuring 264
radii. For these measurements, 15 axial stations
4 in. apart were designated. The radius was then
measured for each 30 deg of rotation from an
assigned zero position at the eight stations nearest
the small-diameter end. At the seven stations
nearest the large-diameter end, the radius was
measured for each 15 deg of rotation from the zero
position. The measurements obtained were compared
with measurements taken after the initial
machining of the model, It was found that the
average radius at each station in no case differed
from the original radius by more than 0.012 in.
At no station did the spread from minimum to
maximum radius exceed 0.021 in., and the average
spread for the 15 stations was 0.014 in. The
a'
crests" and *'valleys*' in a plot of radius vs
rotation indicated that the basic deformation at
each axial station was from circular to elliptical
or pear shaped. This comparison between final and
initial shape is invalid to some degree, because
the initial measurements were taken before the
shell was welded at euch end and installed into
the outer housing.
The shell is now back in the test rig and it is
to be cycled a total of 300 cycles or to failure.
Parts are being fabricated for a second 3Wcycle
test on another core-shell model.
F OR CE D -CI RCU LA T ION COR RO S I ON AN D
MASS-TRANS FE R TESTS
W. B. McDonald
Fused Salts in lnconel and Hastelloy B
J. W. Kingsley P. G. Smith
A. G. Smith24
Nine forced-circulation loops, seven fabricated
of Inconel and two of Hastelloy B, were operated
with fused salts as the circulated fluids during
66
240n assignment from Pratt & Whitney Aircraft.
this quarter. The operational data for these loops
are summarized in Table 1.4.6. Eight of these
loops were electrically heated and one (loop 4935-6)
was heated with a natural-gas furnace. Two of the
lnconel loops circulated a new fuel mixture (No. 70)
NaF-ZrF,-UF, (56-39-5 mole %), and the Hastelloy
B loops circulated the fuel mixture (No. 107)
NaF-KF-Li F-UF, (1 1.2-41-45.3-2.5 mole %). All
other tests were made with the fuel mixture (No. 30)
NaF-ZrF4-UF4 (50-46-4 mole X). Other parameters
investigated were operating temperature of the
fluid, surface-area-to-volume ratio, temperature
differential, and Reynolds number. When com-
pleted, the results of metallurgical examinations of
the loops are reported in Chap. 3.1, '*Dynamic
Corrosion Studies."
The first Hastelloy B loop failed during attempts
to put it into operation. Therefore no corrosion
data were obtained, but valuable information per-
taining to the engineering, fabrication, and opera-
tion of Hastelloy B loops was obtained. As a
consequence, the second Hastelloy B loop operated
satisfactorily for the scheduled 1000 hr,
The one gas-fired loop was terminated at 8319 hr
as a result of a leak in the cooled section. This
leak occurred while the cooled section was being
thawed out after a freezeup which occurred when
the pump-drive unit failed.
Liquid Metals in lnconel and Stainless Steel
J. W. Kingsley P. G. Smith
A. G. Smith
Twelve forced-circulation loops were operated
with sodium or NaK as the circulated fluid, and one
was operated with water. Ten of these loops were
electrically heated and three were heated , by
natural-gas furnaces. The operational data for
these loops are summarized in Table 1.4.7. The
three loops that are heated by gas furnaces are
being operated as life tests. Small centrifugal
pumps (model LFB) are used on the gas-heated
loops; the other loops that circulate liquid metals
have electromagnetic pumps. The model LFB
centrifugal pump was used on the loop that circu-
lated water.
When completed, the results of metallurgical
examinatimsof the loops are reported in Chap. 3.3,
"Dynamic Corrosion Studies."
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