ORNL-5388 - the Molten Salt Energy Technologies Web Site

i
i
i
8 i!'
4-56
n
9 9'
CASE NUMBER
78-2612
Fig. 4.6-1. Breeding Ratio Com onents for LMFBRs Operating on 233U. Cases 8,8' for
20% 233U/U, and Cases 9,9' for 40% 23 5 U/U; Cases 10,lO' for 233U/Th with no 1 38U; see Tables
4.5-1 and 4.6-1.)
The heterogeneous designs also can be employed for the energy-center production
reactors required by the denatured fuel cycles. As indicated in Table 4.6-1, the three
possible production reactors all show significant increases in the quantity of 233U
produced. The net production rates are illustrated schematically by Fig. 4.6-2. More
importantly, however, use of a heterogeneous core design will allow the isotopics of the
fissile material bred in the internal blankets to be adjusted for changing demand
requirements without modifying the driver assemblies. For example the internal blankets
of the Pu/Th LMFBR could be either Tho2 or 238U02, depending on the demand requirements
for 233U and Pu.
c!
[J
c
L