zapkitty wrote:

As for using D-T and other neutronic fuels?

Also tritium is much more costly than the common isotopes of boron and hydrogen:

http://en.wikipedia.org/wiki/Tritium#Production_history

“225 kg (496 lb) of tritium has been produced in the United States since 1955. Since it continually decays into helium-3, the total amount remaining was about 75 kg (165 lb) at the time of the report.”

This is a key advantage of FF over almost all other concepts. There is no need to “breed” the fuel. Quite frankly ITER is pie in the sky on this count alone.