ORNL-2106 - the Molten Salt Energy Technologies Web Site
ORNL-2106 - the Molten Salt Energy Technologies Web Site
ORNL-2106 - the Molten Salt Energy Technologies Web Site
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(d<br />
. terminated after 1217 and 1339 hr of <strong>the</strong> 1500 hr<br />
schedu fed because of. excessive oxidation and<br />
resultant leaks in <strong>the</strong> heated<br />
The remaining loop, 880, compl<br />
* 1OOQ' hr of operation. Meta<br />
of <strong>the</strong>se loops have not been completed,<br />
c<br />
SPECIAL FLUORIDE FUEL MIXTURES IN<br />
INCONEL THERMAL-CONVECTION LOOPS<br />
J. H. DeVan<br />
Additional lnconel <strong>the</strong>rmal-convection loops<br />
have been operated to evaluate corrosion properties<br />
PERIOD ENDING JUNE 10, l956<br />
of several special fluoride fuel mixtures. Tests<br />
of 500 hr duration were completed for mixtures in<br />
<strong>the</strong> MF-ZrF,-UF, system, where MF is KF, LiF,<br />
NaF, or RbF. Mixtures with each of <strong>the</strong>se fluorides<br />
and 40 or 46 mole % ZrF, have been tested; each<br />
mixture contained 4 mole % UF,. The results<br />
obtained for <strong>the</strong> fuels sontaining 46 mole % ZrF,<br />
were reported previously,3 but <strong>the</strong>y are repeated in<br />
Table 3.1.6 for comparison. Lowering <strong>the</strong> ZrF,<br />
content, as shown in Table 3.1.6, had no effect on<br />
attack by <strong>the</strong> NaF-containing mixture, but <strong>the</strong><br />
attack by <strong>the</strong> KF- and RbF-containing mixtures<br />
increased from 1 to 2 mils. The LiF-containing<br />
TABLE 3.1.6. RESULTS OF METALLOGRAPHIC EXAMINATIONS OF INCONEL THERMAL-CONVECTION<br />
LOOPS OPERATED WITH SPECIAL FLUORIDE FUEL MIXTURES<br />
AT A HOT-LEG TEMPERATURE OF lSOO°F<br />
Loop Fuel Mixture Fuel Mixture Composition<br />
Operating<br />
Time<br />
Metal lograph ic Results<br />
Maximum Hat-Leg<br />
No. Code Designation (mole X) Attack Cold-Leg Deposits<br />
(hr)<br />
(mils)<br />
845 94 KF-ZrF4-UF4; 50-46-4 500<br />
846 94 K F*Zr F4-U F4; 50-46-4 500<br />
883 94 K F-ZrF4-U F4; 50-46-4 1500<br />
884 94 K F-Zr F4-U F4; 50-46-4 1500 '<br />
930 WR4 K F-Zr F4-U Fa; 54-40-4 500<br />
931 WR4 KF-ZrF4-UF4; 56-40-4 500<br />
847 93 L i F-Zr F4-UF4; 50-46-4 500<br />
93 LiF*ZrF4-UF4; 50-46-4 500<br />
WR3<br />
WR3<br />
95<br />
95 R bF-Zr F4-UF4; 50-46-4<br />
WRS<br />
WR5<br />
30 NaF-ZrF4=UF4; 50-46-4<br />
30 NaF-ZrF4-UF4; 50-46-4<br />
WR2<br />
WR2<br />
6.5 Metallic layer<br />
8 Metallic layer<br />
11 ktallic layer<br />
9 Metallic layer<br />
7<br />
Metallic layer<br />
9 Metallic layer<br />
17.5 Possible crystals<br />
19 Possible crystals<br />
10 Metallic layer and crystals<br />
10 Metallic layer and crystals<br />
9<br />
9<br />
Me ta I I ic layer<br />
10 Metallic layer and crystals<br />
11<br />
10.5<br />
9<br />
10<br />
7<br />
,139