There are higher-energy reactions, like p+B11, that generate very few neutrons (it's dubbed "aneutronic" for the main reaction, if you can get there cleanly), a

There are higher-energy reactions, like p+B11, that generate very few neutrons (it's dubbed "aneutronic" for the main reaction, if you can get there cleanly), and instead yield high energy charged (alpha) particles and photons. These could maybe be directly converted to electrical energy by a number of proposed mechanisms[2]. Highly challenging, but if possible, a very nice energy source, and we're finally out of the steam age! [1] https://en.wikipedia.org/wiki/Aneutronic_fusion#Boron https://en.wikipedia.org/wiki/Aneutronic_fusion#Boron [2] https://en.wikipedia.org/wiki/Direct_energy_conversion https://en.wikipedia.org/wiki/Direct_energy_conversion