强伽马射线对硬脂酸锌的辐照实验及失效行为分析  

Irradiation Experiment and Failure Behavior Analysis of Zinc Stearate by Strong Gamma-rays

作　　者：兰心雨 李业辉 戴子帆 高文祥 陈阿伟 李翔 魏强林 LAN Xinyu;LI Yehui;DAI Zifan;GAO Wenxiang;Chen Awei;LI Xiang;WEI Qianglin(School of Nuclear Science and Engineering,East China University of Technology,Nanchang 330013,China)

机构地区：[1]东华理工大学核科学与工程学院,南昌330013

出　　处：《能源研究与管理》2023年第1期120-125,共6页Energy Research and Management

基　　金：东华理工大学博士启动基金资助项目(HJSJYB2021-9);江西省大学生创新创业训练计划资助项目(S202010405043);大学生校外创新创业实践教育基地建设资助项目(2022JD04)。

摘　　要：硬脂酸锌作为制备新型混合氧化物燃料(MOX)的团聚剂和润滑剂,对燃料芯块的压制成型具有重要意义。使用钴源辐照装置对硬脂酸锌在不同剂量下辐照,采用X射线衍射和傅里叶红外光谱等分析手段,探究了辐照剂量对硬脂酸锌成分变化,并分析了其失效机制;为进一步明确辐照对其熔点的影响,对1500 kGy辐照样品还开展了升温实验。结果表明,相对于未辐照样品,经500 kGy和1000 kGy的剂量辐照后硬脂酸锌的X射线吸收强度变弱,但分子结构未发生改变。而经1500 kGy的高剂量辐照后,生成了新的羧酸盐或二羧酸产物,从而导致其出现润滑失效行为,升温实验也表明辐照后硬脂酸锌熔点降低约20℃。研究结果对MOX燃料制备过程中成型剂的选择具有一定的参考意义。Zinc stearate is used as agglomerant and lubricant of new mixed oxide fuel(MOX),which is very important for the pressing and forming of fuel pellets.After different irradiated doses with strong cobalt source device,the changes of zinc stearate composition were investigated by X-ray diffraction(XRD)and Fourier infrared spectroscopy(FT-IR),and the failure mechanism was also analyzed.In order to further clarify the effect of irradiation on the melting point,temperature rise experiments were also carried out on 1500 kGy irradiated samples.The results showed that compared with the unirradiated samples,the X-ray absorption intensity of zinc stearate was weakened after low doses of 500 kGy and 1000 kGy irradiation,but the molecular structure of zinc stearate did not change.After high dose irradiation of 1500 kGy,new carboxylate or dicarboxylic acid products were generated,resulting in lubrication failure behavior.Temperature rise experiment also showed that the melting point of zinc stearate decreased by about 20℃after irradiation.The research results have a certain reference significance for the selection of forming agent in the preparation of MOX fuel.

关 键 词：硬脂酸锌 MOX燃料 失效 伽马辐照 

分 类 号：TL99[核科学技术—核技术及应用]