避免出料管破裂或断裂是保证核废料高放废液玻璃固化进程的重要措施之一。通过建立力学模型，分析了服役工况下不同因素对出料管的受力作用及应力大小。结果表明，熔融高放废液玻璃固化料静水压力作用和玻璃固化料及出料管自重作用导致的出料管最大拉应力，远小于出料管不同服役温度时对应的拉伸强度，其对出料管破裂风险影响极低。出料管在停止出料阶段，同时承受固化料对其作用的静水压力和内外壁温差导致的热应力叠加作用，由此导致的最大拉应力分布在出料管内壁，且足以对出料管产生明显不利影响。通过对出料管内、外径进行优化设计，可降低服役过程中导致的最大拉应力值，从而保障出料管的安全可靠应用。

One of the important measures to ensure the glass solidification process of high-level radioactive waste from nuclear waste is to avoid rupture or breakage of the discharge pipe. In this paper, a mechanical model is established, and the stress effects and magnitude of different factors on the discharge pipe under service conditions are analyzed. The results show that the maximum tensile stress on the discharge pipe caused by the hydrostatic pressure of the molten high-level radioactive waste glass curing material and the self weight of the glass curing material and the discharge pipe is much smaller than the corresponding tensile strength at different service temperatures of the discharge pipe, and its impact on the risk of discharge pipe rupture is extremely low. The discharge pipe is subjected to the combined effect of hydrostatic pressure of the curing material and thermal stress caused by the temperature difference between the inner and outer walls during the stop discharge stage. The maximum tensile stress caused by this is distributed on the inner wall of the discharge pipe and is sufficient to have a significant adverse effect on the discharge pipe. By optimizing the design of the inner and outer diameters of the discharge pipe, the maximum tensile stress caused during service can be reduced to ensure the safe and reliable application of the discharge pipe.

TQ171

国家自然科学基金面上项目（52072356）；山东省科技型中小企业创新能力提升工程项目（2022TSGC1194）