ORNL-2106 - the Molten Salt Energy Technologies Web Site

ANP PROJECT PROGRESS REPORT
hole to one of the traps is shown in Figs. 4.2.8
and 4.2.9. The walls of the trap on the inlet side
also showed a black deposit around the sides for
a depth of approximately 1 in., as shown in Fig.
4.2.10.
MTR in-pile loop No. 4 has been sectioned at
NRTS, and the active portion is being shipped to
Oak Ridge. Disassembly of the loop will begin
as soon as the hot cell equipment has been re-
paired and checked out. Priorities have been
established for the examination of sections that
were removed from the ARE, and these exami-
Fig. 4.2.8. Inlet Side of Fission-Gas Adsorption
Trap from MTR In-Pile Loop No. 3. V2X. Re-
duced 15%. (- i
Fig. 4.2.9. Enlargement of Deposit Shown in
Fig. 4.2.8. 2X. Reduced 28.5%
236
nations will proceed as rapidly as cell time
allows.
INVESTIGATIONS OF MATERIALS REMOVED
FROM MTR IN-PILE LOOPS NOS. 3 AND 4
Operation of MTR in-pile loop No. 3, described
previously12 was terminated because a plug
formed somewhere in the purge system. Therefore
a postoperational inspection of the fission-gas
adsorption traps was undertaken. A gas sample
was obtained by purging the traps for 2 hr with
helium and collecting the effluent fission gas in
two refrigerated charcoal traps. A radioassay of
the gas is to be made. The purged traps were
sectioned, and samples of the charcoal adsorber
and tubing were collected for radioassay. An
extensive black deposit was observed around the
inlet to one trap, and a thin brownish film was
present around the inlet to the second trap. These
deposits were photographed (Figs. 4.2.8, 4.2.9,
and 4.2.10) and then collected for analysis. The
results of the analyses of the samples are not yet
available, but it is suspected that oil or decompo-
sition products of.oil entered the traps from the
fuel-pump bearing housing and sump and caused
'On assignment from Pratt & Whitney Aircraft.
2L. P. Carpenter et aL. ANP Quar. frog. Rep. Dec.
10, 1955, ORNL-2012, p 27.
Fig. 4.2.10. Inner Walls of Inlet Side of Fission-
Gas Adsorption Trap from MTR In-Pile Loop No. 3
Showing Depth of Formation of Black Deposit.
1/2X. Reduced 25.5%.
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