The knowledge of chemical conditions, especially of redox
potential, inside waste packages with radioactive wastes is
important for the determination of radionuclides speciation and
their leaching rate after failure of waste packages. Conditions
inside waste packages will be determined primarily by the
reactions of thermodynamically unstable iron with groundwater
penetrating into waste packages and by the nature of the iron selected original L/ILW coming form the light water PWR type
Paks Nuclear Power Plant (Hungary) were placed into special
hermetic containers and the gas generation in them was measured
carefully