放射性废树脂中^(90)Sr与^(137)Cs和^(134)Cs的比例相关性  

Correlation between proportion of^(90)Sr to^(137)Cs and^(134)Cs in radioactive waste resin

作　　者：杨静远 姚晓琦 叶沥 靳海睿 王毅[1] YANG Jingyuan;YAO Xiaoqi;YE Li;JIN Hairui;WANG Yi(School of Environment,Tsinghua University,Beijing 100084,China;Nuclear and Radiation Safety Center,Ministry of Ecology and Environment,Beijing 100082,China;Sanmen Nuclear Power Co.,Ltd.,Taizhou 317100,Zhejiang Province,China)

机构地区：[1]清华大学环境学院,北京100084 [2]生态环境部核与辐射安全中心,北京100082 [3]三门核电有限公司,浙江台州317100

出　　处：《化学工程》2024年第11期1-3,25,共4页Chemical Engineering(China)

摘　　要：难测核素^(90)Sr易沉积在人体骨骼中,并对人体产生长期高能量β射线内照射损伤。高能β射线来自于^(90)Sr本身及其子体^(90)Y。核电厂废离子交换树脂放射性剂量和产量均较大,更需重点监测。评估易测核素^(137)Cs和^(134)Cs对^(90)Sr比例因子相关度,以确定优选方案。通过对5个来源于不同机组的放射性废树脂样品分别进行灰化、碱熔,再酸浸的方式对废树脂吸附的放射性离子进行提取,对每个样品的^(90)Sr/^(137)Cs与^(90)Sr/^(134)Cs活度浓度比例进行分析并计算方差以衡量稳定性。结果表明:^(137)Cs对^(90)Sr有更好的相关度,可作为比例因子研究对象。The DTM(difficult to measure)nuclide^(90)Sr is prone to deposit in human bones and produce long-term internal irradiation due to high-energyβirradiation from^(90)Sr and its daughter^(90)Y.The radioactive dose and production of waste ionic exchange resin in nuclear power plants are both high,and more emphasis is needed to be placed on monitoring.The correlation of ratio factors between easily detectable nuclides^(137)Cs as well as^(134)Cs and the^(90)Sr was evaluated to determine the optimal solution.By ashing,alkali melting,and acid leaching five radioactive waste resin samples from deference nuclear power units,the radioactive ions adsorbed by the waste resin were extracted.The activity concentration ratios of^(90)Sr/^(137)Cs and^(90)Sr/^(134)Cs in each sample were analyzed and variance was calculated to measure the stability.The results indicate that^(137)Cs has a better correlation with^(90)Sr and can be used as a study object for proportional factors.

关 键 词：^(90)Sr 放射性离子交换树脂 比例因子 

分 类 号：TL942.1[核科学技术—辐射防护及环境保护]