The Lithium Blanket at End-of-Life

A spent breeding blanket is recovered for its tritium and recyclable materials, not disposed of as a monolithic high-level object.

The breeding blanket is the breeder's most functionally complex component and, because it sits in the highest neutron flux, its most activated. At end of life or scheduled replacement, it is not treated as one lump of waste but disassembled into its material streams, each recovered or disposed of on its own terms.

The end-of-life sequence

• Tritium recovery: residual tritium is outgassed and returned to the fuel cycle before further handling.
• Decay storage: the module is held so short- and medium-lived activation decays, lowering dose for processing.
• Separation: structural steel, multiplier, and lithium breeder are separated for their respective recycling routes.
• Recycle or dispose: most mass recycles or clears; the residual is LLW/ILW.

Because the blanket contains specially formulated, scarce materials — reduced-activation steel, beryllium or lead, enriched lithium-6 — recovery is useful as well as waste-reducing. Enriched lithium-6 in particular is recovered and recycled rather than discarded, conserving a scarce feedstock and keeping it out of the disposal stream.

Treating the blanket as a set of recoverable material streams rather than a single waste object is what keeps its end-of-life favorable. Each stream — steel, multiplier, lithium, tritium — has its own recovery path, and planning those paths during design is what makes the recovery achievable when the module finally comes out.

The honest qualifier is that blanket end-of-life is a real remote-handling and processing operation requiring decay time and controlled facilities. But the outcome is materials recovery plus a modest LLW/ILW residual — not a long-lived monolith. These are design-and-simulation expectations for the breeder, whose blanket is not yet built.