ORNL-1816 - the Molten Salt Energy Technologies Web Site

into operation with a Reynolds number of 10,000
and a temperature gradient of 2OOOF in the fuel
mixture NaF-ZrF,-UF, (50-46-4 mole %). The
design of this loop is illustrated in Fig. 3.4. A
failure occurred in the heater section of this loop
when the pump was stopped after 48 hr, without
reducing the power input into the heater section,
to take a faulty instrument out of operation. This
loop was constructed of O.ti-in.-OD, 0.020-in.-wall
lnconel tubing. Three unsuccessful attempts have
been made to get the loop back in operation, but,
in each case, failures of the tubing occurred during
the cleaning operation with barren fuel mixture.
Another loop (loop No. 3) constructed of 0.5-
in.-OD, 0.040-in.-wall lnconel tubing was suc-
cessfully started and a Reynolds number of 10,000
and a temperature gradient of 300°F were attained.
After operation for 3 hr, the test was terminated
because of failure of tubing near a welded joint.
The data from the startup revealed conclusively
that the loop could be operated without a heat
economizer; therefore construction of the loop can
be simplified.
A third loop, without the economizer, was built
with OS-in.-OD, 0.045-in.-waI I lnconel tubing.
This loop included a sump pump (model LFB),
a cooler, and a heater. The loop has been in
operation over 150 hr with a Reynolds number of
10,000 and a 2OOOF temperature gradient. The
fuel being used is NaF-ZrF,-UF, (53.5-40-6.5
mole %). The maximum fuel temperature of 1500°F
is produced by a power input of about 72 kw. This
loop is scheduled to operate for 1000 hr.
Beryllium-Sodium-Inconel Mass Transfer
PERIOD ENDING DECEMBER 70,7954
Fig. 3.4. Forced-Circulation Corrosion Test
Loop.
and other sections of the loop have been sub-
mitted for metallographic examination. A fourth
for testing combinations
ntact with high-velocity
'L. A. Mann and F. A. Anderson, ANP Quar. Prog. 'L. A. Mann, ANP Quar. Ptog. Rep. Sept. 10, 1954,
Rep. Sept. 10, 1954, ORNL-1771, p 32. ORNL-1771, p 41.
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