delt0r wrote: It is a easy calculation and you need a lot more than a meter for that kind of power.
Sorry, I spaced out and conflated the question with the shielding stuff and answered something you didn’t ask. Gomen!
The following really is what Lerner had to say about primary gammas:
https://focusfusion.org/index.php/forums/viewreply/6932/
That reaction occurs only at energies above 7Mev and even at 14 Mev is about a million times less likely than the tri-alpha one is at 600 keV.
