increasing proton beam current. Fortunately, MAs are fertile material that becomes
fissile after capturing one neutron, and the drop is very small, as shown in the
following section. Table 19.3 provides weight composition of MA fed to MA-ADS.
Figure 19.2 illustrates the R-Z model for calculation.
19.3.2 Assumption of Pu Feed
Two cases of Pu feed were assumed in the present design for Pu transmutation:
Pu-ADS, to which only Pu is provided from reprocessing process of LWR SF, and
Pu+U-ADS, to which Pu accompanied by U with 50 % weight ratio is provided
from the process. Treatment of pure Pu raises proliferation concern in a country
without nuclear weapons, and the reprocessing plant is designed to add depleted
Table 19.1 Parameters of
minor actinides-acceleratordriven system (MA-ADS) [8]
Thermal power
800 MWt
Electricity generation
260 MWe
Proton energy
1.5 GeV
Transmutation rate
250 kg/300 EFPDs
Coolant
LBE
Upper limitation of k eff
0.97
Operation period
600 EFPDs
Batch number
1
Fuel composition
(Pu+MA)N+ZrN
Pin outer diameter
7.65 mm
Pin pitch
11.48 mm
Table 19.2 MA composition
fed to MA-ADS
MA-ADS (%)
Np-237
49.5
Am-241
32.2
Am-243
13.4
Cm-244
4.4
Cm-245
0.4
Table 19.3 Pu composition
fed to Pu-ADS and Pu+UADS
ADS case
Pu (%)
Pu+U (%)
U-235
–
0.1
U-238
–
49.9
Pu-238
2.4
1.2
Pu-239
54.5
27.2
Pu-240
24.2
12.1
Pu-241
11.9
6.0
Pu-242
7.0
3.5
19 Transmutation Scenarios after Closing Nuclear Power Plants
211