[maccam94]

It captures neutrons and breeds tritium, which will be separated out and used to fuel the fusion reaction.

https://www.sciencedirect.com/topics/engineering/breeding-bl...

[tremon]

The relevant breeder equations, since I was wondering how to create tritium by neutron capture without deuterium:

n + ⁷Li → T + ⁴He + n′

n′ + ⁶Li → T + ⁴He

(and ⁴He + n → D + T)

It didn't help that I was scanning the equations for ²H and ³H, not D or T.