EQUILIBRIUM PRECIPITATION OF PROTACTINIUM OXIDE FROM MOLTEN LiF--BeF$sub 2$- -ThF$sub 4$--UF$sub 4$--PaF$sub 5$ MIXTURES. Page: 2 of 17
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EQUILIBRIUM PRECIPITATION OF PROTACTINIUM OXIDE FROM
MOLTEN LiF-Be F2 ThF4-F -PaF5 MIXTURES
O. K. Tallent and L. M. Ferris
The purpose of this work has been to develop a precipitation process for separating
protactinium from an MSBR-type fuel salt without otherwise appreciable changing the salt.
It was decided, based on previous studies, that a process in which the protactinium would
be precipitated as Pa205 by passing mixed H2O-HF gas through the salt should be
feasible. Some of the things that we wanted to find out about are:
1. What concentrations of H2O and HF are required to affect the protactinium
2. Does the ratio of wafer to HF effect the precipitation?
3. What a the effect of temperature?
4. What conditions result in uranium precipitation - what is something we do
5. Is there a serious corrosion problem? I would like to answer this question now.
There does not appear to be a serious corrosion problem at the HF concentrations
at which we are working. Mainly, we have used nickel and monel as a material
A diagram of the equipment we have used for this work is shown on the FIRST SLIDE. SI
This equipment is located in a glove box in Building 3019. The salt is contained in a nickel
liner in what we call a reaction vessel. The salt is maintained at a temperature of 600-650 C.
An aqueous solution of hydrofluoric acid is added accurately at a controlled rate continuously
from this syringe using a sage syringe pump. So far, we have used two HF concentrations,
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Tallent, O.K. & Ferris, L.M. EQUILIBRIUM PRECIPITATION OF PROTACTINIUM OXIDE FROM MOLTEN LiF--BeF$sub 2$- -ThF$sub 4$--UF$sub 4$--PaF$sub 5$ MIXTURES., report, October 31, 1972; Oak Ridge, Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc1035637/m1/2/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.