## 3 Nuclear Analyses
### Spatial Distributions of the Nuclear Loads on the Divertor Targets, Both for WCLL and HCPB Blanket
Figures 17 and 18 show the nuclear damage (dpa/FPY) distribution on W-monoblocks of the inner and outer target, both for WCLL and HCPB, respectively. Considering the maps shown in Figure 17, related to the WCLL case, the following observations can be noted: the absolute peak value is 2.10 dpa/FPY, achieved in correspondence of the 67 th row of the W-monoblock arrangement, and in particular non the external columns (1 st, 2 nd and 30 th, 31 st) of the inner target. The maximum value on the outer target amounts to 2.07 dpa/FPY, which appears to be quite similar to the inner target case, and it can be observed on the 53 rd row and external columns (1 st, 2 nd and 42 nd, 43 rd) of the W-monoblock array. The absolute minimum value of nuclear damage on W is 0.43 dpa/FPY which is reached on the 1 st row and internal columns (21 st, 22 nd, 23 rd) of the outer target. The minimum value on the inner target is 0.52 dpa/FPY, reached on the innermost columns and lowest row of the array (1 st row; 15 th, 16 th and 17 th columns). Observing Figure 18, which show the maps of the nuclear damage (dpa/FPY) distribution on W-monoblocks for both the target with the HCPB blanket, the following assertion can be made: the absolute peak value amounts to 1.84 dpa/FPY, and it can be observed on the 53 rd row and external columns (1 st, 2 nd and 42 nd, 43 rd) of the outer target. The maximum value on the inner target is 1.83 dpa/FPY, dpa/FPY, reached on the 66 th row and external columns (1 st, 2 nd and 30 th, 31 st) of the inner target. The absolute minimum value is 0.39 dpa/FPY, which is reached on the 1 st row and innermost columns (21 st, 22 nd and 23 rd) of the outer target. The lowest value on the inner target is 0.44 dpa/FPY, once again on the 1 st row and innermost columns (15 th, 16 th and 17 th). Additionally in this case, the highest values of the nuclear damage are achieved on the external edges of both the targets and in particular on the baffle region, showing overall a symmetrical distribution with respect to the central column of both the targets. Figure 16: Nuclear heating (W/cm\({}^{3}\)) distribution on PFC-CB supports (Eurofer) of the inner (**left**) and outer (**right**) target, with HCPB blanket. Figure 15: Nuclear heating (W/cm\({}^{3}\)) distribution on PFC-CB supports (Eurofer) of the inner (**left**) and outer (**right**) target, with WCLL blanket. Figures 19 and 20 show the maps of the nuclear damage (dpa/FPY) distribution of the Cu/CuCrZr components on the inner and outer target, both for WCLL and HCPB, respectively. In particular, looking at the maps of Figure 19, which are referred to the DEMO configuration with WCLL blanket the following highlights can be noted: the absolute peak value amounts to 8.75 dpa/FPY and it is achieved in correspondence of the 60 th row and external columns (1 st, 2 nd, 30 th and 31 st) of the inner target Cu/CuCrZr components. The maximum value on the outer target Cu/CuCrZr components, is 8.47 dpa/FPY, which is reached on the 54 th row and external columns (1 st, 2 nd and 42 nd, 43 rd) of the array. Figure 19: Nuclear damage (dpa/FPY) distribution on Cu/CuCrZr components of the inner (**left**) and outer (**right**) target, with WCLL blanket. Figure 17: Nuclear damage (dpa/FPY) distribution on W-monoblocks of the inner (**left**) and outer (**right**) target, with WCLL blanket. The absolute minimum value is 1.42 dpa/FPY, observed on the 1 st row and innermost columns (21 st, 22 nd and 23 rd) of the Cu/CuCrZr components of the outer target. The lowest value of the inner target is 1.78 dpa/FPY, once again reached on the bottom and central part of the target (1 st row and 15 th, 16 th, 17 th columns). Regarding the HCPB blanket, the same maps of the nuclear damage distribution on Cu/CuCrZr components, can be seen in Figure 20, pointing out the following highlights: the absolute peak value is reached on the 60 th row and external columns (1 st, 2 nd and 30 th, 31 st) of the inner target, and it amounts to 7.31 dpa/FPY.