The work at NASA GRC is based on the idea that gamma radiation with energy greater than 2.22 million electron volts (MeV) can cause deuterons to disintegrate into protons and neutrons. The gamma radiation is produced by a high voltage electron accelerator. Bremsstrahlung gamma rays are produced as the high voltage electrons are slowed down in a metal target. Protons and neutrons produced in the disintegration process will each have about 240 keV of kinetic energy. In a second step, the neutrons produced are envisioned to scatter against atoms of the metal absorber and against deuterons in the absorber. Neutron scattering against deuterium is an elastic process. Neutron velocity will be moderated; and only about half of the energy will be given to the deuteron. Scattering of the neutrons with about 240 keV of kinetic energy against deuterons, however, will result in deuterons with sufficient kinetic energy (velocity) themselves to fuse with other deuterons in the absorber. The fusion reactions can produce about equal amounts of helium-3 and neutrons, and also tritium and protons. These will have MeVs of kinetic energy that, by scattering in the absorber, could possibly result in useful heat energy. Subsequently, neutrons with 240 keV of energy and the neutrons with higher energy from the fusion process could be absorbed into the metal atoms, producing isotopes with higher mass. Protons having 240 keV of energy and protons with higher energy could be absorbed into the metal atoms, producing elements with higher atomic number. The probability (nuclear cross section) for each step should be considered to determine the potential for success of GRC’s approach.