[AndyJackson]

Studies show 1.14 TBR for blanket alone.

Which is the point. There isn't another source of breeding so to get that 1.14 all fusion neutrons have to reach the blanket and all tritium that is breed has to be extracted.

Oh, there is another huge loss - which is that the plasma loses tritium to the first wall, to vacuum pumps etc. Only a fraction of the tritium in the plasma ever fuses to produce the neutron for which breeding happens in the first place. And recovery of that lost tritium is certainly less than 100%.

[TexasGator]

“The calculated local TBR in the present design reached 1.4 or more in the Li-Pb breeder with a sufficient thickness of the breeding zone.”

https://www.sciencedirect.com/science/article/abs/pii/S0920379698001033#:~:text=A%20blanket%20design%20with%20a%20high%20local%20tritium,to%20obtain%20a%20large%20volume%20of%20component%20testing.