2
133 -%�
c4
T a b l e 6.3.
C h a r a c t e r i s t i c s of Fuel C i r c u i t of 1000-Mwe Molten S a l t Converter Reference Design Reactor
Locat ion
Velocity (ft/sec 1
Pump discharge Top of heat exchanger
190 185
35
-
Heat exchanger tubing
Pressure (psia)
8A
Bottom of heat exchanger Bottom of reactor
35
-
Fuel channels i n core
4.3
Top of r e a c t o r (Pump suction)
-
-
0.035
95
0 250
22.5
20
0e 406
80
7,4
Minimum Wall Thickness (inches )
-
-
0 312
*Shell-side
6.2.4
Fuel Volume Contributions t o t h e volume of t h e f u e l system are l i s t e d i n Table 4.1
f o r the reference design.
The volume of f u e l i n t h e e x t e r n a l system de-
pends on t h e power l e v e l and various l i m i t a t i o n s such as those on s a l t temperature, pressure, velocity, thermal stress i n and minimum thickness of heat exchanger tubing, etc. The reference system was designed with considerable conservatism. The f u e l volume could be reduced appreciably w i t h an increase i n s p e c i f i c power; pumping power c o s t s and c a p i t a l investment i n pumps would increase.
Cost of heat exchangers might also increase.
The
design of t h e system should be optimized with respect t o t h e sum of a l l t h e c o s t s affected; but t h i s l a y o
i d e t h e scope of t h e present study.
ernal portion of t h e f u e l system of t h e 3 This is very much smaller reference design is approximately 2.8 M w t / f t 3 than t h e 7.6 M w t / f t used i n a - p r i o r study of a molten s a l t breeder (3) The power density i n t h e
.
which was based on a study by Spiewak and Parsly (991, who estimated a s p e c i f i c power of 4,9 M w t / f t 3 f o r a first generation p l a n t and 7.6 M w t / f t 3
u
for subsequent p l a n t s ,