聚乙烯醇基可剥离膜去除不锈钢表面放射性污染的研究  

Novel Polyvinyl Alcohol Base Peelable Coating for Removal of Radioactive Contamination from Stainless Steel Surface

作　　者：周道辉 苏冬萍 王孝强 雷浩 罗婷[2] 梁帮宏[2] 匙芳廷[1] 张劲松[2] 陈云明[2] 甘泉 ZHOU Daohui;SU Dongping;WANG Xiaoqiang;LEI Hao;LUO Ting;LIANG Banghong;CHI Fangting;ZHANG Jinsong;CHEN Yunming;GAN Quan(Fundamental Science on Nuclear Wastes and Environmental Safety Laboratory,Southwest University of Science and Technology,Mianyang 621010,China;Nuclear Power Institute of China,Sichuan Nuclear Facilities Decommissioning and Radioactive Waste Treatment Engineering Laboratory,Chengdu 610005,China)

机构地区：[1]西南科技大学核废物与环境安全国防重点学科实验室,四川绵阳621010 [2]中国核动力研究设计院,四川省核设施退役及放射性废物治理工程实验室,四川成都610005

出　　处：《原子能科学技术》2021年第9期1650-1655,共6页Atomic Energy Science and Technology

摘　　要：针对放射性热室去污难点,以聚乙烯醇(PVA)作为成膜基材,添加改性淀粉等成分制备可剥离膜涂料,通过改变成膜环境温度及模拟污染液pH值和初始浓度,研究了可剥离膜的稳定性及其对ASUS304钢板表面污染物的施工适宜性和去污性能。结果表明,聚乙烯醇基可剥离膜涂料具有良好的施工性和可剥性,对金属表面单一铀污染物和混合污染物(含钴、锶、铀)的去污率均大于90%。在工装配合下对热室进行去污,取得了极佳的效果,表明本文所研制可剥离膜涂料可用于热室或核设施金属表面的放射性污染去污。In this study,a new peelable polyvinyl alcohol(PVA)base coating was prepared by mixing PVA with modified starch and some other reagents.The properties of stability,film-forming and strippable ability of the coating were studied in detail.The decontamination performances of the coating for removing uranium contamination from the 304 steel plate surface were investigated by varying the temperature of film-forming,the pH value of uranium contamination,and the initial uranium concentration.Furthermore,the overall decontamination ability for several contaminations including uranium,cobalt and strontium by using the coating was tested.The results show that the coating exhibits good peelable and the removal rate of single uranium contamination and mixture contaminations are more than 90%.The excellent decontamination results for the hot chamber under the cooperation of tooling suggest that the peelable coating can be used in the decontamination of radioactive contaminations from metallic surface in hot cell or nuclear facilities.

关 键 词：聚乙烯醇 热室去污 可剥离膜涂料 不锈钢表面 去污率 

分 类 号：TL75[核科学技术—辐射防护及环境保护]