Depleted zinc oxide
The depletion of 64Zn is necessary, because this isotope is transformed into 65Zn by neutron capture. 65Zn with a half-life of 244.26 days emits gamma radiation with 1.115 MeV. 64Zn has a natural abundance of 48.6%, but in DZO it is reduced below 1%. The addition of zinc oxide to the primary water loop of a pressurized water nuclear reactor reduces the corrosion and therefore minimizes the amount of dissolved materials, especially the amount of 60Co.
- Cowan, R. L. (2001). "BWR water chemistry—a delicate balance". Nuclear Energy. 40 (4): 245–252. doi:10.1680/nuen.188.8.131.52338.