[sbierwagen]

He3 is never added? How long can a reactor run without supplying He3?

(This thread is having a hard time settling on a single isotope notation.)

[dkirtley]

The best way to make Helium 3 is with Deuterium fusion. Its a very interesting bootstrap question -- how do you build new reactors, if you have to have working reactors to generate fuel?

[sbierwagen]

So really it's a mixed-mode D-D/3He-D reactor? How much more common are D-D reactions than 3He-D reactions while the reactor is running normally?

How much does the initial charge of 3He cost, given that the stuff costs $7,000 a gram?