夹带剂对超临界CO_2去除铀表面冷却液粘污的影响

Influence of Entrainers on the Supercritical Carbon Dioxide Cleaning of Coolant Contamination on the Uranium Surface

机加工后的铀试样,表面不可避免地残留下影响其腐蚀行为的冷却液粘污。利用含夹带剂的超临界CO2对铀表面机加冷却液粘污进行有效清洗,并利用红外光谱和拉曼光谱对清洗效果进行表征。从初步的实验结果来看,超临界CO2清洗能够去除铀表面大量冷却液粘污;而引入夹带剂甲醇、乙醇后,可进一步提高其清洗效果,且通过红外、拉曼光谱几乎检测不到表面任何冷却液粘污。

The residual coolant on the surface of uranium after manufacture is inevitable and it will be effective on the corrosion of uranium.The coolant contamination has been cleaned by supercritical carbon dioxide（SCCO2）,SCCO2＋methanol and SCCO2＋ethanol.IR and Raman spectra have been used to investigate the cleaning efficiency for residual coolant in this study.The results show that a large amount of coolant contamination has been removed by SCCO2.In addition,the results also show that the cleaning efficiency for residual coolant with SCCO2 can be further enhanced by the addition of entrainers,including methanol and ethanol.