Repeating the electrolysis of deutirium, by constucting a cathode sphere over a strong neutron source such as a smallish nuclear reactor. If the modulator used is heavy water this can form the electrolyte. The resulting oxygen/hydrogen can be combined to return energy. If the whole thing is pressurized with a heat exchanger to supply system running energy, it could be seen if there is a nett energy gain over and above that of the neutron source.
Of course this implies a proton to proton ( if the H+ really looks like that ) distance in which a presumed P-N-P bonding can take place (assuming correct Neutron speeds. )
