Author Contributions
Conceptualization, I.P., F.A.H., P.P., D.R. and G.Z.; methodology, I.P. and P.P.; formal analysis, I.P.; investigation, I.P.; data curation, I.P.; writing—original draft preparation, I.P.; writing—review and editing, I.P., F.A.H. and G.Z.; visualization, I.P. and G.Z.; supervision, F.A.H., P.P., D.R. and G.Z.; project administration, F.A.H., D.R. and G.Z. All authors have read and agreed to the published version of the manuscript.
Figure 1.
HCPB BB CAD model and proposed BSS segmentation for shielding assessments (a); neutronic detailed model of the BB, BSS, VV and TFC (b).
Figure 1.
HCPB BB CAD model and proposed BSS segmentation for shielding assessments (a); neutronic detailed model of the BB, BSS, VV and TFC (b).
Figure 2.
Radial profile at the IB equatorial plane from the FW to the VV of the dpa/FPY for the baseline model and the 3 shielding configurations.
Figure 2.
Radial profile at the IB equatorial plane from the FW to the VV of the dpa/FPY for the baseline model and the 3 shielding configurations.
Figure 3.
Nuclear heating radial profile at the IB equatorial plane from the FW to the VV (a) and just for the BSS (b) for the baseline model and the 3 shielding proposals.
Figure 3.
Nuclear heating radial profile at the IB equatorial plane from the FW to the VV (a) and just for the BSS (b) for the baseline model and the 3 shielding proposals.
Figure 4.
(a) HCPB baseline configuration with 15 cm Eurofer BSS (violet); (b) configuration v1 with 1 cm of B4C (yellow) and 14 cm of Eurofer, with the arrow showing the direction of increasing B4C shielding thickness from 1 cm (v1) to 10 cm of B4C (v10); (c) configuration v10 with 10 cm B4C (yellow) and approximately 5 cm of Eurofer (violet).
Figure 4.
(a) HCPB baseline configuration with 15 cm Eurofer BSS (violet); (b) configuration v1 with 1 cm of B4C (yellow) and 14 cm of Eurofer, with the arrow showing the direction of increasing B4C shielding thickness from 1 cm (v1) to 10 cm of B4C (v10); (c) configuration v10 with 10 cm B4C (yellow) and approximately 5 cm of Eurofer (violet).
Figure 5.
Nuclear heating for the baseline version, the 10 modified versions, and the inverted versions v5 and v10 from the BSS to the TFC (a); zoomed view from the BSS to the VV (b).
Figure 5.
Nuclear heating for the baseline version, the 10 modified versions, and the inverted versions v5 and v10 from the BSS to the TFC (a); zoomed view from the BSS to the VV (b).
Figure 6.
Neutron flux for the baseline model, the 10 modified versions, and inverted versions v5 and v10 from the BSS to the TFC (a); zoomed view from the BSS to the VV (b).
Figure 6.
Neutron flux for the baseline model, the 10 modified versions, and inverted versions v5 and v10 from the BSS to the TFC (a); zoomed view from the BSS to the VV (b).
Figure 7.
Helium production for the baseline model, the 10 modified versions, and inverted versions v5 and v10 from the BSS to the VV.
Figure 7.
Helium production for the baseline model, the 10 modified versions, and inverted versions v5 and v10 from the BSS to the VV.
Figure 8.
He and T production for the baseline model, the 10 modified versions, and inverted versions v5 and v10 as at. He/n (a), at. T/n (b), appm He/FPY (c) and total TBR (d).
Figure 8.
He and T production for the baseline model, the 10 modified versions, and inverted versions v5 and v10 as at. He/n (a), at. T/n (b), appm He/FPY (c) and total TBR (d).
Figure 9.
Horizontal section at equatorial level of the neutronic HCPB model (a); detail of the standard VV in the homogenized neutronic model (b); VV novel configuration with ribs (c).
Figure 9.
Horizontal section at equatorial level of the neutronic HCPB model (a); detail of the standard VV in the homogenized neutronic model (b); VV novel configuration with ribs (c).
Figure 10.
Nuclear heating for the baseline and v10_inverted versions with modified VV.
Figure 10.
Nuclear heating for the baseline and v10_inverted versions with modified VV.
Figure 11.
Helium production (appm He/FPY) as radial profile from the BSS to the TFC for the 3 VV new configurations applied to the baseline and v10_inverted versions in comparison to the standard baseline, v5_inverted and v10_inverted versions.
Figure 11.
Helium production (appm He/FPY) as radial profile from the BSS to the TFC for the 3 VV new configurations applied to the baseline and v10_inverted versions in comparison to the standard baseline, v5_inverted and v10_inverted versions.
Table 1.
Damage function (dpa/FPY) in different cells of the inner and outer VV shell at the equatorial IB level for the baseline model and 3 configurations of the BSS shielding materials.
Table 1.
Damage function (dpa/FPY) in different cells of the inner and outer VV shell at the equatorial IB level for the baseline model and 3 configurations of the BSS shielding materials.
Shielding Configuration | VV Inner Shell | VV Outer Shell |
---|
Baseline | 0.1302 | 4.0611 × 10−5 |
B4C | 0.0319 | 2.8009 × 10−5 |
YH1.6 | 0.0290 | 3.8602 × 10−5 |
WC | 0.0338 | 2.0670 × 10−5 |
Table 2.
Nuclear heating (W/cm3) at first cm of TFC.
Table 2.
Nuclear heating (W/cm3) at first cm of TFC.
Analyzed Versions | X = 425–430 cm; Y = 10–15 cm; Z = 0–50 cm |
---|
baseline | 8.69 × 10−5 |
v1 | 7.36 × 10−5 |
v2 | 6.83 × 10−5 |
v3 | 5.37 × 10−5 |
v4 | 5.16 × 10−5 |
v5 | 4.72 × 10−5 |
v6 | 4.16 × 10−5 |
v7 | 3.69 × 10−5 |
v8 | 3.32 × 10−5 |
v9 | 3.30 × 10−5 |
v10 | 3.24 × 10−5 |
v5_inverted | 4.06 × 10−5 |
v10_inverted | 2.81 × 10−5 |
Table 3.
Neutron flux (n/cm2/s) at first 5 cm of TFC for the baseline model, versions v1–v10, and v5_inverted and v10_inverted.
Table 3.
Neutron flux (n/cm2/s) at first 5 cm of TFC for the baseline model, versions v1–v10, and v5_inverted and v10_inverted.
Analyzed Versions | X = 425–430 cm; Y = 10–15 cm; Z = 0–50 cm |
---|
baseline | 2.21 × 109 |
v1 | 2.07 × 109 |
v2 | 2.29 × 109 |
v3 | 1.82 × 109 |
v4 | 1.74 × 109 |
v5 | 1.66 × 109 |
v6 | 1.57 × 109 |
v7 | 1.47 × 109 |
v8 | 1.43 × 109 |
v9 | 1.41 × 109 |
v10 | 1.40 × 109 |
v5_inverted | 1.65 × 109 |
v10_inverted | 1.33 × 109 |
Table 4.
Damage function (dpa/FPY) at first 5 cm of TFC and at the first cm of the VV for the baseline model, versions v1–v10, and v5_inverted and v10_inverted.
Table 4.
Damage function (dpa/FPY) at first 5 cm of TFC and at the first cm of the VV for the baseline model, versions v1–v10, and v5_inverted and v10_inverted.
Analyzed Versions | X = 425–430 cm; Y = 0–5 cm at First cm of TFC | X = 503–504 cm at First cm of VV |
---|
baseline | 1.81 × 10−5 | 1.53 × 10−1 |
v1 | 1.69 × 10−5 | 1.28 × 10−1 |
v2 | 1.24 × 10−5 | 9.27 × 10−2 |
v3 | 1.42 × 10−5 | 9.43 × 10−2 |
v4 | 1.50 × 10−5 | 8.58 × 10−2 |
v5 | 1.40 × 10−5 | 7.70 × 10−2 |
v6 | 1.41 × 10−5 | 6.94 × 10−2 |
v7 | 1.41 × 10−5 | 6.29 × 10−2 |
v8 | 1.24 × 10−5 | 5.76 × 10−2 |
v9 | 1.27 × 10−5 | 5.52 × 10−2 |
v10 | 1.24 × 10−5 | 5.27 × 10−2 |
v5_inverted | 1.28 × 10−5 | 7.46 × 10−2 |
v10_inverted | 1.16 × 10−5 | 5.07 × 10−2 |
Table 5.
Helium production (appm He/FPY) at the first 3 cm of the VV steel layer and inside the water and steel layer in which the peak was located for the baseline model, versions v1–v10, and v5_inverted and v10_inverted.
Table 5.
Helium production (appm He/FPY) at the first 3 cm of the VV steel layer and inside the water and steel layer in which the peak was located for the baseline model, versions v1–v10, and v5_inverted and v10_inverted.
Analyzed Versions | Inside Water and Steel Mixed Layer | Inside ~3 cm Steel Layer |
---|
X = 490–495 cm | X = 495–500 | X = 500–501 | X = 501–502 | X = 502–503 | X = 503–504 |
---|
baseline | 1.23 | 1.16 | 0.56 | 0.49 | 0.47 | 0.37 |
v1 | 0.96 | 0.88 | 0.42 | 0.37 | 0.34 | 0.27 |
v2 | 0.72 | 0.68 | 0.35 | 0.32 | 0.33 | 0.27 |
v3 | 0.64 | 0.59 | 0.29 | 0.26 | 0.25 | 0.19 |
v4 | 0.55 | 0.51 | 0.27 | 0.25 | 0.25 | 0.20 |
v5 | 0.47 | 0.44 | 0.24 | 0.22 | 0.22 | 0.18 |
v6 | 0.41 | 0.39 | 0.22 | 0.21 | 0.21 | 0.19 |
v7 | 0.36 | 0.33 | 0.18 | 0.18 | 0.18 | 0.15 |
v8 | 0.31 | 0.29 | 0.17 | 0.17 | 0.18 | 0.15 |
v9 | 0.28 | 0.27 | 0.16 | 0.16 | 0.16 | 0.14 |
v10 | 0.25 | 0.25 | 0.15 | 0.15 | 0.16 | 0.15 |
v5_inv | 0.37 | 0.35 | 0.19 | 0.17 | 0.17 | 0.15 |
v10_inv | 0.21 | 0.21 | 0.14 | 0.14 | 0.14 | 0.13 |
Table 6.
Helium production in different magnitudes at B4C shield for the baseline model, versions v1–v10, and v5_inverted and v10_inverted configurations.
Table 6.
Helium production in different magnitudes at B4C shield for the baseline model, versions v1–v10, and v5_inverted and v10_inverted configurations.
He in B4C | v1 | v2 | v3 | v4 | v5 | v6 | v7 | v8 | v9 | v10 | v5_inv | v10_inv |
---|
HeBR at. He/n (1) | 1.93 × 10−4 | 2.66 × 10−4 | 3.13 × 10−4 | 3.45 × 10−4 | 3.68 × 10−4 | 3.85 × 10−4 | 3.99 × 10−4 | 4.09 × 10−4 | 4.17 × 10−4 | 4.24 × 10−4 | 2.93 × 10−4 | 3.74 × 10−4 |
at He/cm3 n | 2.00 × 10−9 | 1.38 × 10−9 | 1.09 × 10−9 | 8.98 × 10−10 | 7.68 × 10−10 | 6.70 × 10−10 | 5.95 × 10−10 | 5.34 × 10−10 | 4.85 × 10−10 | 4.44 × 10−10 | 5.48 × 10−10 | 3.71 × 10−10 |
appmHe/fpy | 325.31 | 224.59 | 176.81 | 146.28 | 125.10 | 109.11 | 96.91 | 87.07 | 79.01 | 72.40 | 89.37 | 60.44 |
cap/m3 | 2.68 × 1026 | 1.85 × 1026 | 1.46 × 1026 | 1.21 × 1026 | 1.03 × 1026 | 8.99 × 1025 | 7.98 × 1025 | 7.17 × 1025 | 6.51 × 1025 | 5.96 × 1025 | 7.36 × 1025 | 4.98 × 1025 |
mol He/fpy (1) | 7.18 | 9.87 | 11.64 | 12.82 | 13.69 | 14.31 | 14.81 | 15.19 | 15.49 | 15.76 | 10.88 | 13.90 |
mol He/fpy (2) | 229.75 | 315.98 | 372.41 | 410.22 | 438.00 | 457.87 | 473.98 | 486.16 | 495.81 | 504.32 | 348.17 | 444.85 |
Table 7.
Tritium production at the B4C shield and the rest of the BB structures for the baseline model, versions v1–v10, and v5_inverted and v10_inverted configurations. The material numbering used in the MCNP input is maintained in this table.
Table 7.
Tritium production at the B4C shield and the rest of the BB structures for the baseline model, versions v1–v10, and v5_inverted and v10_inverted configurations. The material numbering used in the MCNP input is maintained in this table.
(at. T/n) | Baseline | v1 | v2 | v3 | v4 | v5 | v6 | v7 | v8 | v9 | v10 | v5_inv | v10_inv |
---|
T in B4C | 0 | 2.43 × 10−7 | 4.54 × 10−7 | 6.55 × 10−7 | 8.30 × 10−7 | 9.87 × 10−7 | 1.13 × 10−6 | 1.25 × 10−6 | 1.36 × 10−6 | 1.46 × 10−6 | 1.55 × 10−6 | 4.53 × 10−7 | 1.03 × 10−6 |
T in m10 | 3.32 × 10−2 | 3.31 × 10−2 | 3.32 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.31 × 10−2 | 3.32 × 10−2 | 3.31 × 10−2 |
T in m35 | 2.11 × 10−3 | 2.11 × 10−3 | 2.10 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 | 2.11 × 10−3 |
T in m36 | 1.07 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.06 × 10−3 | 1.07 × 10−3 | 1.06 × 10−3 |
T in m30 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97 × 10−4 | 2.97× 10−4 |
tot m10---m30 | 3.67 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 |
tot + B4C | 3.67 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 | 3.66 × 10−2 |
TBR 360° in BB | 1.1734 | 1.1717 | 1.1716 | 1.1708 | 1.1707 | 1.1707 | 1.1705 | 1.1704 | 1.1704 | 1.1704 | 1.1704 | 1.1722 | 1.1714 |
TBR 360° in BB+B4C | 1.1734 | 1.1717 | 1.1716 | 1.1709 | 1.1707 | 1.1707 | 1.1705 | 1.1705 | 1.1705 | 1.1705 | 1.1705 | 1.1722 | 1.1715 |
(mol T/FPY) | Baseline | v1 | v2 | v3 | v4 | v5 | v6 | v7 | v8 | v9 | v10 | v5_inv | v10_inv |
T in B4C | 0 | 0.0090 | 0.0169 | 0.0243 | 0.0309 | 0.0367 | 0.0418 | 0.0464 | 0.0506 | 0.0542 | 0.0575 | 0.0168 | 0.0384 |
T in m10 | 1233.3 | 1231.6 | 1231.8 | 1230.7 | 1230.5 | 1230.5 | 1230.3 | 1230.3 | 1230.3 | 1230.2 | 1230.2 | 1232.1 | 1231.3 |
T in m35 | 78.32 | 78.23 | 78.08 | 78.23 | 78.23 | 78.25 | 78.23 | 78.23 | 78.23 | 78.23 | 78.23 | 78.28 | 78.27 |
T in m36 | 39.74 | 39.57 | 39.37 | 39.48 | 39.46 | 39.46 | 39.45 | 39.44 | 39.43 | 39.44 | 39.43 | 39.62 | 39.51 |
T in m30 | 11.04 | 11.03 | 11.04 | 11.03 | 11.03 | 11.03 | 11.03 | 11.03 | 11.03 | 11.03 | 11.03 | 11.03 | 11.03 |
tot m10---m30 | 1362.4 | 1360.5 | 1360.3 | 1359.4 | 1359.3 | 1359.2 | 1359.1 | 1359.0 | 1359.0 | 1358.9 | 1358.9 | 1361.0 | 1360.1 |
tot + B4C | 1362.4 | 1360.5 | 1360.3 | 1359.5 | 1359.3 | 1359.3 | 1359.1 | 1359.0 | 1359.0 | 1359.0 | 1359.0 | 1361.1 | 1360.2 |
tot BB 360° | 43,597 | 43,535 | 43,529 | 43,502 | 43,496 | 43,496 | 43,490 | 43,487 | 43,487 | 43,486 | 43,486 | 43,553 | 43,524 |
tot BB+B4C 360° | 43,597 | 43,535 | 43,530 | 43,503 | 434,97 | 43,497 | 43,491 | 43,489 | 43,488 | 43,488 | 43,488 | 43,554 | 43,525 |
Table 8.
Nuclear heating at first radial cm of the TFC for the baseline and v10_inverted versions with modified VV.
Table 8.
Nuclear heating at first radial cm of the TFC for the baseline and v10_inverted versions with modified VV.
Nuclear Heating at First cm of TFC (X = 425–430 cm; Y = 10–15 cm; Z = 0–50 cm) |
---|
Analyzed Versions | W/cm3 | Δ% Over Baseline | Δ% Over v10_inverted |
---|
Baseline | 8.69 × 10−5 | | |
Baseline_VV1 | 3.06 × 10−5 | 64.76% | |
Baseline_VV2 | 2.64 × 10−5 | 69.67% | |
Baseline_VV3 | 2.60 × 10−5 | 70.11% | |
v10_inverted | 2.81 × 10−5 | 67.72% | |
v10inv_VV1 | 1.60 × 10−5 | | 43.17% |
v10inv_VV2 | 1.47 × 10−5 | | 47.81% |
v10inv_VV3 | 1.31 × 10−5 | | 53.45% |
Table 9.
Neutron flux at first radial cm of the TFC for the baseline and v10_inverted versions with modified VV.
Table 9.
Neutron flux at first radial cm of the TFC for the baseline and v10_inverted versions with modified VV.
Neutron Flux at First cm of TFC (X = 425–430 cm; Y = 10–15 cm; Z = 0–50 cm) |
---|
Analyzed Versions | n/cm2/s | Δ% Over Baseline | Δ% Over v10_inverted |
---|
Baseline | 2.21 × 109 | | |
Baseline_VV1 | 1.72 × 109 | 22.46% | |
Baseline_VV2 | 1.59 × 109 | 28.26% | |
Baseline_VV3 | 1.36 × 109 | 38.46% | |
v10_inverted | 1.33 × 109 | 39.80% | |
v10inv_VV1 | 1.07 × 109 | | 20.06% |
v10inv_VV2 | 9.77 × 108 | | 26.67% |
v10inv_VV3 | 8.65 × 108 | | 35.07% |
Table 10.
Damage function (dpa/FPY) at first radial cm of the TFC for the baseline and v10_inverted versions with modified VV.
Table 10.
Damage function (dpa/FPY) at first radial cm of the TFC for the baseline and v10_inverted versions with modified VV.
dpa/FPY at First cm of TFC (X = 425–430 cm; Y = 0–5 cm; Z = 0–50 cm) |
---|
Analyzed Versions | dpa/FPY | Δ% Over Baseline | Δ% Over v10_inverted |
---|
Baseline | 1.81 × 10−5 | | |
Baseline_VV1 | 1.57 × 10−5 | 13.13% | |
Baseline_VV2 | 1.49 × 10−5 | 17.81% | |
Baseline_VV3 | 1.34 × 10−5 | 25.98% | |
v10_inverted | 1.16 × 10−5 | 35.85% | |
v10inv_VV1 | 9.60 × 10−6 | | 17.40% |
v10inv_VV2 | 9.94 × 10−6 | | 14.42% |
v10inv_VV3 | 8.94 × 10−6 | | 23.00% |
Table 11.
Helium production in the VV for the baseline and v10_inverted versions with modified VV.
Table 11.
Helium production in the VV for the baseline and v10_inverted versions with modified VV.
|
appm He/fpy at the VV (at Y = 5–10 cm; Z = 0–50 cm)
|
---|
Analyzed Versions
|
Internal Layers
| |
Inside ~3 cm External Steel Layer 2 |
---|
X= 495–500 cm 1 |
X = 500–501 3 |
X = 501–502
|
X = 502–503
|
X = 503–504
|
---|
Baseline 1 | 1.16 | 0.56 | 0.49 | 0.47 | 0.37 |
| X= 497–498 | X = 498–499 | X = 499–500 | X = 500–501 | X = 501–502 | X = 502–503 | X = 503–504 |
Baseline_VV1 | 94.54 | 305.96 | 116.00 | 0.206 | 0.161 | 0.191 | 0.178 |
Baseline_VV2 | 99.51 | 323.01 | 154.45 | 0.233 | 0.174 | 0.204 | 0.189 |
Baseline_VV3 4 | 0.40 | 0.52 | 359.28 | 274.30 | 0.162 | 0.193 | 0.183 |
| X= 495–500 cm 1 | X = 500–501 | X = 501–502 | X = 502–503 | X = 503–504 |
v10_inverted 1 | 0.21 | 0.136 | 0.137 | 0.145 | 0.125 |
| X= 497–498 | X = 498–499 | X = 499–500 | X = 500–501 | X = 501–502 | X = 502–503 | X = 503–504 |
v10inv_VV1 | 13.65 | 41.15 | 15.72 | 0.135 | 0.099 | 0.116 | 0.109 |
v10inv_VV2 | 13.78 | 41.53 | 19.63 | 0.136 | 0.102 | 0.120 | 0.115 |
v10inv_VV3 4 | 0.098 | 0.117 | 45.92 | 34.33 | 0.096 | 0.120 | 0.121 |