For almost three years, AECL went through its calculations, but nothing changed: if its model of how the reactor functioned was correct, the PCR should be negative.

This is where having a negative PCR is handy, because it automatically limits the number of neutrons flying through the reactor, so it damps itself down after a momentary power increase.

Aeration has a negative effect on the two-dimensional electrode reactor, whereas it enhances the removal effect of the three-dimensional electrode reactor on COD.