The aim of the studies about the stability of nuclear glasses is to predict as accurately as possible their behavior over geological timescale. It requires the development of experimental methods to accelerate their irradiation and leaching ageing. This study focuses on the International Simple Glass behavior under irradiation by evaluating its structural and macroscopic property evolutions, and also its long-term chemical durability. Two irradiation ageing scenarios are considered: an alpha self-irradiation of a ²⁴⁴Cm-doped-ISG glass and an external irradiation with few MeV gold ions of non-radioactive ISG glass coupons. The results obtained from the Raman spectroscopy, density, and hardness measurements led to the conclusion that ballistic effects from the recoil nuclei are responsible of the changes with dose observed under alpha self-irradiation and that the ISG glass is a good surrogate of the French nuclear SON68 complex glass under such irradiation conditions. The assessment of the structural evolution with dose of this glass reinforces the mechanistic concepts about the glass response under alpha self-irradiation damage, where the glass response to a recoil nucleus event is the result of a very fast quenching of the damaged zone in the displacement cascade. Furthermore, the irradiation damage induced by gold ions does not fully mimic the ²⁴⁴Cm-doped glass evolution with nuclear dose, since the results of this simulation method overestimates the amplitude of the irradiation damage in the glass because the effects of the alpha particle are not included. Finally, this study demonstrates that the ISG glass water alteration at high-reaction progress is impacted by the glass damage, which indicates that the long-term glass chemical durability will depend on the glass structure when water arrives in contact.

关于核玻璃稳定性的研究的目的是尽可能准确地预测其在地质时间尺度上的行为。它需要发展实验方法以加速其辐照和浸出老化。本研究通过评估其在结构和宏观性质上的演变以及其长期化学耐久性，着眼于国际简单玻璃在辐照下的行为。考虑了两种辐照老化方案：²⁴⁴的alpha自辐照掺Cm的ISG玻璃和外部照射的非放射性ISG玻璃试样的MeV金离子很少。从拉曼光谱，密度和硬度测量获得的结果得出这样的结论：反冲核的弹道效应是阿尔法自辐照下观察到的剂量变化的原因，并且ISG玻璃是法国核材料的良好替代品SON68复合玻璃在这种辐照条件下。对这种玻璃剂量的结构演变的评估加强了关于玻璃在α自辐照损伤下的响应的力学概念，其中玻璃对后坐核事件的响应是位移中受损区域非常快速淬火的结果级联。此外，金离子引起的辐照损伤不能完全模仿²⁴⁴ Cm掺杂的玻璃具有核剂量的析出，因为此模拟方法的结果高估了玻璃中的辐照损伤的幅度，因为不包括α粒子的影响。最后，这项研究表明，ISG玻璃在高反应进度下的水蚀变化受到玻璃损伤的影响，这表明水接触后，玻璃的长期化学耐久性将取决于玻璃结构。