Yea, I was off by a factor of 10.<p><a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Equivalent_dose" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Equivalent_dose</a>
1W of 2.5Mev neutrons ~= 10W worth of Gamma Rays in terms of equivalent dose.  (<a href="http:&#x2F;&#x2F;ocw.mit.edu&#x2F;courses&#x2F;nuclear-engineering&#x2F;22-01-introduction-to-ionizing-radiation-fall-2006&#x2F;lecture-notes&#x2F;absorbed_dose.pdf" rel="nofollow">http:&#x2F;&#x2F;ocw.mit.edu&#x2F;courses&#x2F;nuclear-engineering&#x2F;22-01-introdu...</a>) There are several 14.1+Mev fusion products see chart: <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Nuclear_fusion" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Nuclear_fusion</a> (Which is probably where I was thinking 100Mev), but it’s already normalized so we are talking 10W equivalent.<p>Granted that 10W dose equivalent is not focused so a person standing next to it might get 8% of that which is .8W, or ~0.01W&#x2F;kg equivalent (for a 80kg person) which just happens to be ~1 Rads per second.  (1 rad = 0.01 Gy = 0.01 J&#x2F;kg. 250 to 500 rads is the LD&#x2F;50.<p>So, Standing next to an unshielded 1W neutron source has a 50&#x2F;50 shot giving you a lethal dose within ~4 to 9 minutes.<p>PS: 2.5Mev Neutron radiation @ 1J per kg is ~10 Gy which is ~LD100 and probably where I was thinking 1W = death.<p>(Please double check my math.)