” TBR of 1.14 for the blanket is a problem because that is an ideal breeding ratio before you account for loses in the process of actually extracting the tritium from the blanket and using it some time in the future.”
You claimed less than 1.0
Due to supply. problems, tritium will be extracted and used in very short times.
” Losing >>10% in pumps,”
I would expect that the tritium would be extracted BEFORE reaching the pumps.
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.