CLAM钢中氕氘的渗透与去除  

Permeation and Release Behavior of Protium/Deuterium in CLAM Steel

作　　者：陆光达[1] 向鑫[1] 张桂凯[1] 包锦春 范东军 杨飞龙[1] 陈长安[2] 唐涛[1] LU Guangda;XIANG Xin;ZHANG Guikai;BAO Jinchun;FAN Dongjun;YANG Feilong;CHEN Chang＇an;TANG Tao(Institute of Materials,China Academy of Engineering Physics,Jiang you 621907,China;Science and Technology on Surface Physics and Chemistry Laboratory,Jiangyou 621908,China)

机构地区：[1]中国工程物理研究院材料研究所,四川江油621907 [2]表面物理与化学重点实验室,四川江油621908

出　　处：《原子能科学技术》2018年第8期1474-1480,共7页Atomic Energy Science and Technology

基　　金：国家磁约束核聚变能发展研究专项资助(2015GB109006);国家自然科学基金资助项目(51471154)

摘　　要：低活化铁素体/马氏体钢(RAFM钢)是聚变堆产氚包层的优选结构材料。氢同位素在结构材料中的扩散渗透特性关系到产氚回收率、燃料循环及运行安全。本工作对国内研发RAFM钢之一的CLAM钢进行了气体驱动的氘渗透实验,得到573~873K温度范围内氘的宏观溶解度S(mol/(m3·Pa0.5))为0.264exp(-22 447/RT),扩散系数D(m2/s)为1.38×10-7exp(-17 271/RT),渗透率Φ(mol/(m·s·Pa0.5))为3.64×10-8exp(-39 718/RT)。还进行了氕氘气体混合物的渗透实验,确认了渗透同位素效应;探索了钢中溶解氘的真空热释放去除。The reduced activation ferritic/martensitic（RAFM）steel is a promising structure material candidate for tritium blanket module in fusion reactor.Hydrogen isotopes transport within the material must be well characterized for affecting the tritium recovery from the module,the self-sufficiency of the fusion fuel recycling and the radiological safety.The deuterium transport parameters of diffusivity,Sieverts constant and permeability in CLAM（China low activation martensitic）steel which is one of RAFM steel developed in China were experimentally measured by means of the gas permeation technique over the temperature range of 573-873 K with driving pressure from 0.03 to0.1 MPa.The resultant transport parameters are：A Sieverts constant of S（mol/（m3·Pa0.5））=0.264 exp（-22 447/RT）,a diffusivity of D（m2/s）=1.38×10^（-7）·exp（-17 271/RT）and a permeability ofΦ（mol/（m·s·Pa0.5））=3.64×10^（-8）·exp（-39 718/RT）.There is an obvious isotope effect on H-D mixture permeation in which permeability of deuterium is less than that of protium.Experiments and theoretical analysis reveal that thermal release at high temperature shall be an efficient way for removal of the deuterium dissolved in the steel.

关 键 词：CLAM钢 氕 氘 渗透 除氢 

分 类 号：TL341[核科学技术—核技术及应用]