Depleted zinc oxide

zinc isotope with the atomic mass 64, and used as a corrosion inhibitor in nuclear pressurized water reactors

MeV.^{[1] 64}Zn has a natural abundance of 48.6%, but in DZO it is reduced below 1%. Adding zinc oxide to the primary water loop of a boiling water reactor or pressurized water nuclear reactor reduces corrosion and therefore minimizes the amount of dissolved materials, especially ⁶⁰Co