核电厂放射性废液环境对设备衬胶耐老化性能的影响
2024-05-21贾斌斌黄皓张树刚韩健彭舒舒关银柏
贾斌斌 黄皓 张树刚 韩健 彭舒舒 关银柏



摘要:國内某核电厂放射性废液收集、处理、贮存、排放系统容器类设备采用内衬橡胶防腐设计,随着服役时间
增长,内衬橡胶层性能会逐渐降低,乃至老化失效,影响设备运行安全,甚至导致放射性液体泄漏。通过 橡胶热老化实验,推算对比内衬胶板在辐照、辐照浸渍等不同条件下的使用寿命;红外测试、热重测试、冲击强度测试、硬度测试,对比原始胶板、辐照胶板、辐照浸渍胶板各项理化性能的变化,最终确定核电厂放射性废 液环境下橡胶老化的主要影响因素。
关键词:放射性废液 辐照橡胶 老化 性能影响
中图分类号:TL94
The Effect of the Radioactive Waste Liquid Environment in Nuclear Power Plants on the Aging Resistance of Equipment Linings
JIA Binbin1 HUANG Hao2 ZHANG Shugang1 HAN Jian2 PENG Shushu1 GUANG Yinbo1
1. Suzhou Nuclear Power Research Institute Co., Ltd., Suzhou, Jiangsu Province, 215004 China; 2. Taishan Nuclear Power Joint Venture Co., Ltd., Jiangmen, Guangdong Province,529228 China
Abstract: The container equipment of the collection, treatment, storage and discharge system of radioactive waste liquid in a nuclear power plant in China adopts rubber-lined anti-corrosion design. With the increase of service time, the performance of the lined rubber layer will gradually decrease, even age and fail, which affects the safety of equipment operation and even leads to the leakage of radioactive liquid. This paper calculates and compares the service life of lined rubber plates under different conditions such as irradiation and irradiation immersion through thermal aging experiments for rubber, compares the changes of the physical and chemical properties of original rubber plates, irradiated rubber plates and irradiated impregnated rubber plates through infrared tests, thermogravimetric tests, impact strength tests and hardness tests, and ultimately determines the main influencing factors of rubber aging in the radioactive waste environment of nuclear power plants.
Key Words: Radioactive waste liquid; Irradiation; Rubber; Aging; Performace impact
橡胶作为一类有机高分子化合物,具有较高的体积弹性和较低的形状弹性, 以及优良的机械强度、化学稳定性和耐候性[1],因其优异的综合性能而广泛应用。相比于金属材料,橡胶易受环境因素影响,特别是经受强辐照、高温后性能严重衰退,在一些特殊工况条件下应用会受到一定限制[2]。国内某核电厂放射性废液收集、处理、贮存、排放系统容器类设备采用内衬橡胶防腐设计,随着服役时间增长,内衬橡胶层性能会逐渐降低, 乃至老化失效,影响设备运行安全。因此,对核电厂放射性废液环境下设备衬胶耐老化性能开展研究,确定衬胶老化的主要影响因素,对于开展放射性废液环境下衬胶设备的寿命评估、老化管理、失效分析、预防性防腐管理保证设备长期安全稳定运行具有重要意义。……
