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Aegis / MetroVolt burner · design render
Aegis / MetroVolt burner · design render · © 2026 KFE

Neutron Flux

Neutron flux versus radius through blanket and shield — OpenMC.
Neutron flux versus radius through blanket and shield — OpenMC. canon 2026-08-27 · © 2026 KFE

How many neutrons cross a unit area per second — the driver of damage and breeding.

Glossary of Fusion & Plasma TermsUpdated 2026-08-11

Neutron flux measures the intensity of the neutron field. It sets both the tritium breeding rate in the blanket and the damage rate in structures. The breeder's 70.7 MW of neutron power makes its flux the design driver; the burner's is far lower.

Neutron flux sets both value and damage: it drives the tritium breeding rate in the blanket and the degradation rate in structures. The breeder's 70.7 MW of neutron power makes its flux the dominant design driver, treated as a product to be captured rather than merely a hazard to be shielded.

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