[en] This study added Mo and Zr as simulated waste elements to a vitrified object for the purpose of the geological disposal of high active liquid waste (HALW), and compared their behavior in the glass network structure through local structure analysis. It was confirmed that by increasing the alkali content, the temperature dependence under high temperature state becomes high. Both Mg, which has a smaller ionic radius, and Zn, which forms a covalent bond, tended to show higher temperature dependence than Ca. It was confirmed that the temperature dependence can be reduced by increasing the addition amount of divalent elements. Since Mo does not change the coordination number compared with Zr, it was confirmed that Mo maintains a strong four-coordination structure even at high temperature and does not contribute to the network structure of glass. In the high temperature state of Zr, the oxygen coordination number decreases and the distance between Zr and O extends, so that what was present as charge compensation in the gap of the network structure collapses due to glass melting, and the structural order of Zr-O is broken. In the leaching test, it was confirmed by chemical durability test that structure change was little when comparing the glass surface and inside in the period after 1.5 days, which verified that the altered layer was formed during this period. It was also confirmed that Mo that forms the yellow phase is easily affected by leaching, and tends to change its valence. (A.O.)