And if not there's always the option to make people do lethal things against their will. People have been sent to their deaths by the millions over the course of history, that's totally doable.
IMO, dotting the landscape with such reactors is just asking for some state or other to take them and use them to leapfrog a lot of the effort required to build nuclear bombs.
Or less if you don't have long to live anyway.
Those are "carrot" versions. There are also "stick" ones.
Given that even the US Military doesn't have infinite resources, how can you guarantee there will be a fast response, or any response at all, or even that anyone will notice 20 years after deployment if someone with the resources of a nation state tries to get at that Pu? There might be wars where that reactor is deployed, there might be natural disasters, people might switch to 100% renewables and lose interest in the reactor, ...
So what? Put them under military control, then.
Hooraa!
NWO, there you go!