高温堆芯熔融物池反应机制研究  

Reaction Mechanism of High-Temperature Corium Pool of Core

作　　者：薛宝权 杨亚倩 梁田[2,3] 陈波[2,3] 马颖澈[2,3] 刘奎[2,3] 单宏祎[4] 康泰峰[4] 顾培文[5] Xue Baoquan;Yang Yaqian;Liang Tian;Chen Bo;Ma Yingche;Liu Kui;Shan Hongyi;Kang Taifeng;Gu Peiwen(School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;CAS Key Laboratory of Nuclear Materials and Safety Assessment,IMR(NMSA),Shenyang 110016,China;CNNC North Nuclear Fuel Components Co.,Ltd,Baotou 014000,China;Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd,Shanghai 200233,China)

机构地区：[1]中国科学技术大学材料科学与工程学院,辽宁沈阳110016 [2]中国科学院金属研究所师昌绪先进材料创新中心,辽宁沈阳110016 [3]中国科学院核用材料与安全评价重点实验室,辽宁沈阳110016 [4]中核北方核燃料元件有限公司,内蒙古包头014000 [5]上海核工程研究设计院有限公司,上海200233

出　　处：《稀有金属材料与工程》2022年第3期913-920,共8页Rare Metal Materials and Engineering

基　　金：中国科学院核用材料与安全评价重点实验室2021年度开放课题(2021NMSAKF04)。

摘　　要：为模拟核电厂高温堆芯熔融物堆内滞留的瞬态现象,采用冷坩埚电磁感应加热熔炼50 kg级ZrO_(2)-Fe-Zr体系的混合物,通过XRD、SEM、EDS等检测手段分析了凝固后的熔融物铸锭的氧化层、金属层和氧化结壳的物相和元素分布情况。结果表明:50 kg级初始熔池形成过程中,高温熔融物由于重力作用和不相容性分离成金属层和氧化层的2层结构,在熔池顶部及周围形成氧化结壳。之后,由于二次加料形成顶部液态金属3层熔池,顶部金属熔池可穿过氧化物硬壳以液滴状逐渐沉降到熔池底部。In order to simulate the transient phenomenon of retention in high temperature core melt of nuclear power plant,the mixture of 50 kg ZrO_(2)-Fe-Zr system was melted by electromagnetic induction in a cold crucible.The phase and element distribution of oxide layer,metal layer and oxide crust of solidified melt ingot were analyzed by XRD,SEM,EDS and so on.The results show that during the formation of the 50-kg-scale initial molten pool,the high temperature molten material is separated into a two-layer structure of metal layer and oxide layer due to gravity and incompatibility,and an oxidation crust is formed on and around the top of the molten pool.After that,due to the secondary feeding to form a three-layer molten pool with the top liquid metal,the top metal molten pool can gradually settle to the bottom of the molten pool by the oxide hard crust.

关 键 词：核电安全 严重事故 熔融物堆内滞留(IVR) 熔融氧化锆 分层机制 

分 类 号：TL69[核科学技术—核技术及应用]