ORNL-1771 - Oak Ridge National Laboratory

ANP QUARTERLY PROGRESS R€PORT
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TEMPERATURE ("GI
Fig. 8.1. Enthalpy vs Temperature for biF-NaF-UF, (51.6-38.4-4.8 mole %IO).
where T is the liquid temperature in "C. Measure-
ments were made by the buoyancy principle. A
calculated value for the liquid density at the
melting point, given in the Liquid Metals [fund-
book,2 falls within 3% of the value yielded by this
study.
This experiment was carried out at the request
of the QRSORT group currently studying the use
of rubidium vapor in an aircraft reactor cycle.
Measurements were mode on a sample of metal
'R. N. Lyon (ed), Liquid Metals Handbook, p 52,
AEC-Department of the Navy, NAVEXOS P-733 (rev),
June 1952.
128
produced by the Stable Isotope Research and Pro-
duction Division by reduction of a high quality
fluoride which was prepared by the QRSORT group
from RbF furnished by the Materials Chemistry
Divi s ion.
In order to obtain more accurate viscosity data
it was decided to initiate a program of refining
viscometry techniques. In particular, the influence
of fluid density on calibrations of bath the ro-
tational and the capillary devices is being studied.
Easily handled fused salts are being uSed as
calibrating fluids. The present studies indicate
that some of the old calibration curves, which were