Remote Maintenance
Neutron-activated components are serviced by remote handling, a design requirement that shapes the blanket, ports, and foundry availability.
Why remote handling
After operation, components near the plasma are activated by neutrons and cannot be serviced by direct human contact. The breeder is designed for remote maintenance: replacing blanket modules, servicing the divertor, and inspecting internals with remote handling equipment through designed access.
What it shapes
- Blanket built as replaceable modules rather than a monolith
- Access ports and handling paths designed into the vessel from the start
- Component connections designed to be made and broken remotely
- Maintenance sequences planned alongside the assembly sequence
The availability link
A foundry lives on availability, the fraction of time it produces product. Maintenance downtime directly reduces output. Designing for efficient remote maintenance is therefore a foundry requirement, not a convenience: faster module changeouts mean more neutron-hours and more product per year.
The trade with breeding
Remote maintenance requires access and penetrations, and penetrations reduce blanket coverage and net breeding. This is one of the real trades in the design: maintainability against breeding ratio. It is part of why TBR is treated as a lever rather than a single maximized number.
Remote maintenance is a design requirement for a machine not yet built. Its effectiveness is a major factor in the NOAK and BOAK goal of high, reproducible foundry availability.