Well there is a very good reason why modern nuclear reactors have a negative void coefficient (you just turn off the neutron source and the reactor naturally turns itself off
Or if really paranoid have a supply of Xenon-135 handy and that reactor will be shutdown in microseconds (which by the way is naturally produced by the reactor itself and why early prototype rectors kept turning themself off after running for a bit)
Well there is a very good reason why modern nuclear reactors have a negative void coefficient (you just turn off the neutron source and the reactor naturally turns itself off
Or if really paranoid have a supply of Xenon-135 handy and that reactor will be shutdown in microseconds (which by the way is naturally produced by the reactor itself and why early prototype rectors kept turning themself off after running for a bit)