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Component | Dimension | Material | Composition [wt%] | Density [g⋅cm−3] |
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Centre tube coolant | 4.6 cm radius | Light water | 100% H2O | Variable |
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Centre flow tube | 4.60 cm inner radius; 0.1 cm thick | Zr-modified 310 stainless steel | C: 0.034; Si: 0.51; Mn: 0.74; P: 0.016; S: 0.002; Ni: 20.82; Cr: 25.04; Fe: 51.738; Mo: 0.51; Zr: 0.59 | 7.9 |
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Inner fuel pins (24) | 0.415 cm radius; 5.4 cm pitch radius | 0–3 m ∣ 12.8 wt% PuO2 in ThO2 | Pu: 11.293; Th: 76.632; O: 12.075 | 9.91 |
3-4 m ∣ 12.3 wt% PuO2 in ThO2 | Pu: 10.851; Th: 77.072; O: 12.077 |
4-5 m ∣ 11.5 wt% PuO2 in ThO2 | Pu: 10.146; Th: 77.775; O: 12.079 |
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Outer fuel pins (24) | 0.44 cm radius; 6.575 cm pitch radius | 0–3 m ∣ 10.24 wt% PuO2 in ThO2 | Pu: 9.034; Th: 78.882; O: 12.084 | 9.87 |
3-4 m ∣ 9.84 wt% PuO2 in ThO2 | Pu: 8.682; Th: 79.233; O: 12.085 |
4-5 m ∣ 9.20 wt% PuO2 in ThO2 | Pu: 8.117; Th: 79.796; O: 12.087 |
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Inner fuel pins with burnable absorber (8) | 0.415 cm radius; 5.4 cm pitch radius (evenly spaced, π/8 angular offset) | 0–3 m ∣ 12.8 wt% PuO2 in ThO2; 3 wt% Gd2O3 in PuO2/ThO2 | Pu: 10.954; Th: 74.333; O: 12.11; Gd: 2.603 | 9.82 |
3-4 m ∣ 12.3 wt% PuO2 in ThO2; 2 wt% Gd2O3 in PuO2/ThO2 | Pu: 10.635; Th: 75.53; O: 12.10; Gd: 1.735 | 9.85 |
4-5 m ∣ 11.5 wt% PuO2 in ThO2; 2 wt% Gd2O3 in PuO2/ThO2 | Pu: 9.943; Th: 76.219; O: 12.103; Gd: 1.735 | 9.85 |
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Outer fuel pins with burnable absorber (8) | 0.44 cm radius; 6.575 cm pitch radius (evenly spaced, no angular offset) | 0–3 m ∣ 10.24 wt% PuO2 in ThO2; 3 wt% Gd2O3 in PuO2/ThO2 | Pu: 8.764; Th: 76.515; O: 12.118; Gd: 2.603 | 9.79 |
3-4 m ∣ 9.84 wt% PuO2 in ThO2; 2 wt% Gd2O3 in PuO2/ThO2 | Pu: 8.508; Th: 77.649; O: 12.108; Gd: 1.735 | 9.81 |
4-5 m ∣ 9.20 wt% PuO2 in ThO2; 2 wt% Gd2O3 in PuO2/ThO2 | Pu: 7.955; Th: 78.20; O: 12.11; Gd: 1.735 | 9.81 |
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Cladding | 0.06 cm thick | Zr-modified 310 stainless steel | As above | 7.9 |
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Coolant | | Light water | 100% H2O | Variable |
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Liner tube | 7.2 cm inner radius; 0.05 cm thick | Zr-modified 310 stainless steel | As above | 7.9 |
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Insulator | 7.25 cm inner radius; 0.55 cm thick | Yttria stabilized Zirconia | Zr: 66.63; Y: 7.87; O: 25.5 | 5.37 |
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Outer liner tube | 7.8 cm inner radius; 0.05 cm thick | Excel aloy | Sn: 3.5; Mo: 0.8; Nb: 0.8; Zr 94.9 | 6.52 |
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Pressure tube | 7.85 cm inner radius; 1.2 cm thick | Excel alloy | Sn: 3.5; Mo: 0.8; Nb: 0.8; Zr 94.9 | 6.52 |
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Moderator | 25 cm square lattice pitch | Heavy water | 99.833 D2O; 0.167 H2O | 1.0851 |
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Plutonium isotopics | | Reactor grade plutonium | Pu238: 2.75; Pu239: 51.96; Pu240: 22.96; Pu241: 15.23; Pu242: 7.10 | |
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Control blade body | Span 48.4 cm; thickness 1 cm; | Excel alloy | Sn: 3.5; Mo: 0.8; Nb: 0.8; Zr: 94.9 | 6.52 |
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Control blade absorber | Position on the blade’s arm: 16–24 cm; thickness 0.8 cm | Stainless steel 304 | | 7.94 |
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