Tokamak radiation-shield design · 14.1 MeV

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SAFE ≤ 5.0 W/cm³QUENCH > 5.0 W/cm³10-50 cm · f 0.10-0.90 · 4 material systems

Thickness (cm) vs
Absorber Fraction

1016222832384450
13
12
11
10
9.8
9.1
8.4
7.7
7.0
5.6
10
9.5
8.9
8.4
7.8
7.3
6.7
6.2
5.6
4.5
6.6
6.2
5.9
5.5
5.1
4.8
4.4
4.0
3.7
2.9
5.4
5.1
4.8
4.5
4.2
3.9
3.6
3.3
3.0
2.4
4.3
4.1
3.8
3.6
3.4
3.1
2.9
2.7
2.4
1.9
2.9
2.7
2.6
2.4
2.2
2.1
1.9
1.8
1.6
1.3
2.4
2.2
2.1
2.0
1.8
1.7
1.6
1.4
1.3
1.1
1.6
1.5
1.4
1.3
1.2
1.1
1.1
1.0
0.9
0.7
.10.18.26.34.42.50.58.66.74.90
f → absorber fractionthickness ↑
32cm · f.42 → 3.4 W/cm³ SAFE · ±0.4

Heating

3.4W/cm³

Damage

0.09DPA/fpy

Toroidal field coil limit 0.15

Flux

4.5e9n/cm²/s

SAFE

Sample data · Surrogate v0.4.2 · Drag to scrub · Click to lock

What engineers get

Tokamak shield design without waiting on transport runs

OpenMC surrogate, in milliseconds

Total, neutron and gamma magnet heating, DPA per full-power year, fast-neutron flux and a ±σ band as you drag — instead of multi-hour OpenMC runs per design.

HTS magnet protection

A 5.0 W/cm³ quench threshold and Machine Protection Layer interlocks (plasma β ≤ 1.2, coil ≤ 68 kA, thermal ≤ 5) flag designs that would put superconducting magnets at risk.

Fusion neutron shielding design space

Sweep shield thickness × absorber fraction across four material systems, click any cell to load it, and export the telemetry array or OpenMC geometry.

Fusion neutronics optimizer + assistant

Auto-Optimize finds the thinnest safe shield; the assistant explains why a design quenches and always points you back to OpenMC verification.

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FAQ · Tokamak shield design

Fusion neutronics questions, answered

OpenMC surrogate predictions for fusion neutron shielding and HTS magnet protection.

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