Page 233

209

OANL- DWG 71-95498

c

k

A CIRCULAR CONTACTOR, 10 in. DIA

LAR CONTACTOR.

20

50 loo 200 500 LIMITING AGITATOR SPEED ( r m )

WOO

Fig. 17.6. Correlation of limiting agitator speed with agitator diameter in several contactom

The rate at which mercury circulated between the two halves of a l@in.-diam contactor having a 3-in.diam agitator was determined by measuring the rate of return of the liquids to a common temperature on resumption of mercury flow after one side of the cell had been chilled and the other side of the cell had been heated. The mercury flow rate was found to be about 15 liters/min and depended, to some extent, on propeller configuration. A bismuth circulation rate of 0.5 literlmin or greater is desired in the contactor for metal transfer experiment MTE-3, which uses a 10-in.diam contactor. Thus, it appears that circulation of the bismuth phase will be more than adequate.

The three carbon steel vessels required for the experiment are shown in Fig. 17.7. The fluoride salt reservoir is on the left, the compartmented salt-metal contactor is in the center, and the rareearth stripper vessel is on the right. The fluoride salt pump, which has been fabricated, will be inserted in the large flange on the fluoride salt reservoir. Both the pump discharge line to the salt-metal contactor and the return stream from the contactor pass through the upper horizontal 3-in.diam pipe between the two vessels. The lower pipe is a structural member. The agitators for promoting contact of the salt and bismuth will be mounted on the two flanged nozzles on the salt-metal contactor vessel (only one nozzle can be seen in this view) and on the vertical flanged nozzle on the rare-earth stripper. The lithium chloride will be pumped back and forth between the salt-metal contactor and the rareearth stripper vessel by varying the gas pressure in the stripper vessel. Figure 17.8 shows a detailed view of the top of the rareearth stripper vessel with the agitator shaft seal housing and shaft cooler installed in the agitator nozzle. The vessel is

17.4 DESIGN OF THE THIRD METAL TRANSFER EXPERIMENT E. L. Nicholson

W. F. Schaffer, Jr.

E. L. Youngblood L. E. McNeese H. 0.Weeren

t j.

'

The design of the third engineering experiment MTE-3 for development of the metal transfer process for removing rare earths from MSBR fuel carrier salt has been completed. Most of the equipment has been fabricated, and the main process vessels are now being installed. This experiment will use salt flow rates that are 1% of the estimated flow rates required for processing a 1000-MW(e) reactor. The planned experiment and equipment have been described previ~usly.~

3. E. L. Nicholson et al., MSR Program Semiannu. Progr Rep. Feb. 28, 1971, ORNL-4676, pp. 245-55.

Bd

Fig. 17.7. Equipment for metal transfer experiment MTEr3.

ORNL-4728  

http://www.energyfromthorium.com/pdf/ORNL-4728.pdf

ORNL-4728  

http://www.energyfromthorium.com/pdf/ORNL-4728.pdf

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