ORNL-5388 - the Molten Salt Energy Technologies Web Site

%-
f
$400
J
2
s
2,
1
THE LWR FOLLOWED BY AN AWAKED CONVERTER
ON THE THROWAWAY CiCLf
YEAR
Fig. 6.2-8. The Effect on the Nuclear
Contribution of Adding Advanced Converters
on the Throwaway Cycle (200 GWe in 2000
plus 10 GWe/yr Thereafter) (High-Cost U308
Supply 1 -
0 an0
6 0.001s -
B
G
j.
2 o.0010
n
s
r
-
REFEINCE ENRICHMEM IAILS COMPOSITION @.m?O)
IMPROVED ENRICHMNl TARS
I
I
-I
Fig. 6.2-10. The Enrichment Tails
Composition as a Function of Time for the
Reference Case and for an Improving Tails
Strategy.
I
6-26
in Fig. 6.2-8, for which a reduced growth rate was assumed.
Im, 1 I I I I I
THE LWR ON TI€ THROWAWAY CYCLE
YEAR
Fig. 6.2-9. The Effect of Enrichment
Tails Composition on the Nuclear Contri-
bution with the LWR on the Throwaway Cycle
(High-Cost U308 Supply).
WAR
Fig. 6.2-11. The Amounts of U308
Processed Through the Enrichment Plants
as a Function of Time for the LWR on the
Throwaway Cycle (High-Cost U308 Supply).
With the intermediate-cost
supply, the effect of the 4-yr difference in introduction dates between the SSCR and the
HTGR is no longer significant, and the HTGR makes the greater contribution.
The effect of changing the enrichment tails composition upon the nuclear contribution
with the LWR on the throwaway cycle is shown in Fig. 6.2-9 in which the reference case with
a constant enrichment tails composition of 0.0020 is compared with two other cases: one in
which the enrichment tails composition decreases linearly from 0.0020 in 1980 to 0.0005 in
2010 and remains constant thereafter; and another in which the tails composition similarly
decreases and in addition the tails stockpile accumulated prior to 2010 is mined at a later
date with a tails composition of 0.0005. The decreasing enrichment tails composition, shown
in Fig. 6.2-10, is the industry average, and hence the improving tails strategy-implies low-
ering the tails composition of the gasequs diffusion plants beginning in 1980. In addition,
the strategy implies a continual transition toward an industry based upon an enrichment
process capable of operating at an average tails composition of 0.0005.
L;
I;
L
C ?
b
c
L
L
L