放射性表面污染金属废物激光去污工艺研究  

Study on Laser Decontamination Technology for Metal Scraps with Radioactively Contaminated Surfaces

作　　者：赵菀 曹俊杰[1] 王帅[1,2] 文小军 张永领[1] 丁然[1] 彭婧[1] Zhao Wan;Cao Junjie;Wang Shuai;Wen Xiaojun;Zhang Yongling;Ding Ran;Peng Jing(Nuclear Power Institute of China,Chengdu,610213,China;Sichuan Provincial Engineering Laboratory of Nuclear Facilities Decommissioning and Radwaste Management,Chengdu,610213,China)

机构地区：[1]中国核动力研究设计院,成都610213 [2]四川省核设施退役及三废治理工程实验室,成都610213

出　　处：《核动力工程》2021年第5期250-255,共6页Nuclear Power Engineering

摘　　要：为实现激光去污技术在放射性表面污染金属废物清洁解控或循环再利用方面的应用,以350 W的纳秒脉冲光纤激光器为基础搭建了激光去污实验装置,针对激光功率、脉宽、频率、线间距、扫描速度等关键参数开展了一系列激光剥离去污工艺实验,根据实验结果分析得出激光去污工艺规律和不同去污深度的最佳工艺参数,并以某核电厂控制棒水池贮存搁架底板为对象开展验证试验。验证试验结果显示,采用激光去污技术,去污深度达到10μm后,样品的β射线放射性表面污染水平已低于0.8 Bq/cm2,可达到清洁解控的表面污染水平要求。In order to apply the laser decontamination technology to the clearance or recycling of metal scraps with radioactively contaminated surfaces,this study builds a laser decontamination experimental setup based on the 350 W nanosecond pulsed fiber laser.Then,this study conducts a series of experiments for the key parameters of the laser ablation and decontamination technology,including laser power,pulse duration,frequency,line spacing and scanning speed.According to these experimental results,the rule and the optimum parameters corresponding to different decontamination depths for the laser decontamination technology are obtained.This study in turn conducts verification test of this technology by applying it to the storage rack baseplate of the control rod pool for a nuclear power plant(NPP).The test results show that after the laser decontamination technology is used and the decontamination depth reaches 10μm,the contamination level of the surface radioactively contaminated byβrays of the sample is reduced to less than 0.8 Bq/cm2,and can meet the clearance level.

关 键 词：激光去污 激光剥离 放射性 金属废物 去污工艺 

分 类 号：TL944[核科学技术—辐射防护及环境保护]