聚变堆用CuCrZr合金腐蚀模型研究及实验验证  

Study on corrosion model and experimental verification of CuCrZr alloy for fusion reactor

作　　者：朱卉平[1] 刘旭东[1] 陈嘉威 杨鹏威 黄柏锟 马雁[1] ZHU Huiping;LIU Xudong;CHEN Jiawei;YANG Pengwei;HUANG Bokun;MAYan(North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学,北京102206

出　　处：《核技术》2020年第11期76-82,共7页Nuclear Techniques

基　　金：国家自然科学基金(No.11705059、No.U1967212);国家科技重大专项(No.2019ZX0600409);中央高校基本科研业务费(No.2019MS034)资助。

摘　　要：铜铬锆(CuCrZr)合金是聚变堆偏滤器水冷却回路中的重要结构材料,也是聚变堆活化腐蚀产物的重要贡献者。因此,在聚变堆放射性源项计算程序中急需开发CuCrZr合金的腐蚀模型。通过对CuCrZr合金在国际热核聚变实验堆(International Thermonuclear Experimental Reactor,ITER)相同的水环境下的动态水腐蚀和连续水腐蚀实验,研究其腐蚀机理,发现CuCrZr合金的腐蚀是由流体冲刷腐蚀与水氧化腐蚀两部分共同作用的结果,由此构建了CuCrZr合金腐蚀模型。通过实验验证,模型计算值与实验值之间的相对误差最大点12.1%,表明该腐蚀模型比较科学合理。[Background]CuCrZr alloy is an important structural material for divertor water cooling circuit of fusion reactor.It is the primary contributor to the activated corrosion products of the fusion reactor.Therefore,it is urgent to develop the corrosion model of CuCrZr alloy in the calculation program of radioactive source term of fusion reactor.[Purpose]The study aims to clarify the corrosion mechanism and develop the corrosion model in the calculation program of the CuCrZr alloy radioactive source term in fusion reactor.[Methods]First of all,the corrosion experiments for CuCrZr alloy samples were carried out in the same dynamic and continuous water environment as the International Thermonuclear Experimental Reactor(ITER).Then the corrosion weight loss analysis and microscopic analysis were carried out to find the corrosion mechanism.Finally,the corrosion model of CuCrZr alloy was established and verified by experimental data.[Results]Corrosion experimental results indicate that the corrosion of CuCrZr alloy was caused by the combined action of fluid erosion and water oxidation corrosion.The maximum relative error between the calculated value and the experimental value of the established CuCrZr alloy corrosion model is 12.1%.[Conclusions]The model built in this study can be used as an empirical formula to predict the corrosion behavior of CuCrZr alloy in fusion reactor conditions.

关 键 词：CUCRZR合金 ITER工况 溶氧 腐蚀模型 

分 类 号：TL99[核科学技术—核技术及应用]