A sustained nuclear reaction is then one that generates enough opposite/negative particles for the reaction to proceed at a constant rate.
A controlled nuclear process is then one that is able to control (increase/decrease) the number of opposite/negative particles in the reaction.
Run away! I am nuclear.
What then are boron, silver, indium and cadmium as control rods and what are neutrons? If we are looking at heavy metal as nuclear fuel, then electrons are probably the negative particles of interest and protons, the generators of weak \(g\) fields sites at the nucleus; at least at the on start. Upon initiation, opposite/negative particles released from the nucleus trigger further nuclear disintegration. If neutrons are \(g^{+}\) particles then they have nothing to do with triggering this process of nuclear collapse described here.
Come back! I am not nuclear just foolish.
Note: \(g^{+}\) particle increases gravitation potential locally. When interior parts of any structure are lifted up, horizontal cracks can appears. And that's how they crack up. \(g^{+}\) particles are regulated for this different reason. \(T^{+}\) is heat. A reactor do not crack because of a faulty temperature gauge. A \(g^{+}\) particle detector is needed. \(e^{-}\) is the key particle to control nuclear rate of reaction. \(p^{+}\) is probably the blue hue photons.
