I said overall the TBR is less than one when practical considerations are accounted for. Another point - the calculation ignores fusion neutron interactions with and absorbtion by structural eleements. His materials list assumes pure material. In fact practical structural materials have lots of impurities and there will be neutron losses there before breeding can occur. Same with first wall.
“I said overall the TBR is less than one when practical considerations are accounted for. “
Let me correct you: I said overall the TBR is less than one when practical considerations are NOT accounted for.
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” It gets you close to 1 Tritium bred per fusion created, but it assumes 100% of neutrons go to breeding and it assumes no losses due to hydrogen diffusion into metals, pump losses, etc.”
“I said overall the TBR is less than one when practical considerations are accounted for. Another point - the calculation ignores fusion neutron interactions with and absorbtion by structural eleements.”
I refer you back to my first link which had TBR values greater than 1.2 considering structural materials.