About the data

Blankets and heat recovery

Official name
Fusion reactor blanket
ENGLISH
Breeding blanket

In a D–T fusion reactor, the blanket receives neutron energy as heat and also supports tritium breeding. Heat extraction and material durability are crucial.

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A terminology guide explaining meaning and role.Checked: 2026-10-08。
The blanket captures neutrons from D–T plasma and transfers heat to the cooling system. Lithium-bearing breeder material also produces tritium for extraction. Durability, shielding and remote maintenance are needed.
The demonstration-reactor blanket connects heat recovery for power generation with fuel breeding. This original diagram follows QST’s explanation of the principle; dimensions and specifications of the former JA DEMO are not presented as finalized Q-DEMO specifications.FUSION INDUSTRY editorial team — original diagram

In a D–T fusion reactor, the blanket receives neutron energy as heat and also supports tritium breeding. Heat extraction and material durability are crucial.

Business considerations

Consider manufacturing repeatability, maintenance, quality assurance and supply availability alongside individual performance. Check the reactor's overall objectives and the scope demonstrated for each component.

Conceptual tritium fuel cycle: breeding in a lithium-bearing blanket, extraction and purification, fuel supply and D–T fusion. Unburned fuel is recovered from exhaust and reused.
Conceptual diagram: breeding tritium in the blanket and recovering unburned fuel follow different paths. This is not evidence of fuel self-sufficiency; production, recovery and inventory management must be verified together.FUSION INDUSTRY editorial team — original diagram

Understanding the organizations and companies

A D–T reactor blanket is an in-vessel system combining heat recovery, shielding and tritium breeding. Materials, coolants and replacement methods depend on the approach and design. ITER's test blanket modules test future technologies; they do not demonstrate fuel self-sufficiency or electricity generation across ITER. Company test loops and conceptual designs must also be distinguished from long-term irradiation tests inside a reactor.

ITER Organization / Members' Domestic Agencies / Kyoto Fusioneering / Helical Fusion / Type One Energy

Official information from related companies and research institutions

Check each organization’s announcements for development progress and technical documentation.

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