ORNL-TM-7207 - the Molten Salt Energy Technologies Web Site

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3. EXTERIOR SALT CHANNEL
TEMPERATURE
a 1 2 3 4 5 8
AXIAL POSITION (rn)
Fig. 9. Axial temperature profiles: graphite and fuel salt for core
hot channel.
Table 23 gives flow areas, salt velocities, Reynolds numbers, and
heat-transfer c~efficients for the interior and exterior channels (in
both core zones A and R) for two cases: the core hot channel and the
core average channel. The salt velocities are those necessary for an
equal 139'C (25Q°F) temperature rise ~CPQSS the core in the interior and
exterior channels. The hydraulic diameters are not equal; thus, orificing
of the interior channels would be necessary. This could be accomplished
easily by reducing the diameter of the interior channel by -50% for a
short interval near core inlet and/or outlet, Overall core orificing
would also be neeessary t o equalize core exit temperatures. The fric-
tional pressure drop across the core [-a kPa (1 psi)] is insignificant
when compared with the pressure drop across the primary heat exchanger