Radiation durability of aluminophosphate glass prepared for the stable storage of high-level nuclear wastes

57Fe Moessbauer spectra of 30CaO x 15Al2O3 x 5Fe2O3 x 25PbO x 25P2O5 glass consist of two quadrupole doublets due to distorted Fe(III)O6 and Fe(II)O6 octahedra. Moessbauer spectra of the aluminophosphate glass irradiated with 60Co γ-rays (∼5 x 104 Gy) were essentially the same as those of non-irradiated glass. Moessbauer spectra of γ-ray irradiated aluminophosphate glass, containing 10 stable isotopes (Sr, Y, Zr, Nb, Mo, Ba, La, Ce, Pr, and Nd) as the simulated nuclear waste, were also the same as those of non-irradiated glass. These results indicated that the aluminophosphate glass containing iron and lead has high radiation-durability, in addition to high heat resistivity and high water resistivity. (author)