## 3 Nuclear Analyses
### Spatial Distributions of the Nuclear Loads on the Divertor Targets, Both for WCLL and HCPB Blanket  
Figures 11 and 12 show the nuclear heating (W/cm\({}^{3}\)) distribution on W-monoblocks of the inner and outer target, both for WCLL and HCPB, respectively. From the maps shown in Figure 11 the following considerations can be pointed out: the absolute peak value amounts to around 21.40 W/cm\({}^{3}\) with the WCLL blanket and it is achieved in correspondence of the 47 th monoblock along the vertical direction of the 1 st and 43 rd columns (external sides) on the outer target. The maximum value on the inner target amounts to around 21.20 W/cm\({}^{3}\), achieving it in correspondence of the 58 th monoblock along the vertical direction of the external edges of the target (1 st, 2 nd, 30 th and 31 st columns). More in general, for both the targets, the highest values of nuclear heating are reached on the baffle regions than the straight leg of the vertical target, this latter area being less exposed to neutron irradiation (smaller plasma view factor). In this regard, the minimum values amount to about 12.80 W/cm\({}^{3}\) for the inner target, achieved in correspondence of the 4 th monoblock on the innermost arrays (columns: 14 th, 15 th and 16 th) and 8.31 W/cm\({}^{3}\) on the 4 th monoblock arranged on the innermost arrays (columns: 21 st, 22 nd, 23 rd arrays) of the outer target. In addition, a symmetrical trend of the distribution with respect to the target central axis is highlighted for both the targets. It can also be noted that the intensity of the nuclear heating tends to be greater on the external sides of the target than on the internal ones. This effect on the toroidal distribution of the loads is much more accentuated on the inner target than the outer one and it is probably since the external sides (especially on the baffle region) are subjected to higher irradiation levels due to the radiation streaming in the gaps between the cassettes. From the maps shown in Figure 12 the following highlights can be underlined: the absolute peak value amounts to around 19.00 W/cm\({}^{3}\) with the HCPB blanket both for the outer and inner target. They are achieved in correspondence of the 47 th monoblock along the vertical direction of the 1 st and 43 rd columns (external sides) for the outer target and of 58 th monoblock towards the vertical direction of the external edges of the inner target (columns: 1 st, 2 nd, 30 th and 31 st arrays). Once again, for both the targets, highest values of nuclear heating are reached on the baffle regions than the straight leg of the vertical target, being the minimum values about 10.44 W/cm\({}^{3}\) for the inner target, reached in correspondence of the 4 th monoblock on the innermost arrays (columns: 14 th, 15 th and 16 th) and 7.84 W/cm\({}^{3}\) on the 4 th monoblock arranged on the innermost arrays (21 st, 22 nd, 23 rd columns). The symmetrical trend of the distribution with respect to the target central axis for both the targets is confirmed also with the HCPB blanket. The intensity of the nuclear heating tends to be greater on the external sides of the target, which is the maximum value of the nuclear heating. the target than on the internal ones (especially for the inner target), also considering the HCPB case. The nuclear heating density distribution (W/cm\({}^{3}\)) on Cu\(\backslash\)CuCrZr components of the inner and outer target, are shown in Figures 13 and 14, for the WCLL and HCPB case, respectively. Looking at the maps of Figure 13, the following highlights can be underlined: the absolute maximum value amounts to 8.77 W/cm\({}^{3}\), considering the WCLL blanket and it is achieved in correspondence of the 60 th copper element along the vertical direction of the external sides of the inner target (1 st, 2 nd, 30 th and 31 st arrays). The peak value on the outer target is reached in correspondence of the 49 th copper element placed along the vertical direction, again on the external edges (1 st, 2 nd, 42 nd and 43 rd arrays), amounting to around 8.28 W/cm\({}^{3}\).