核素在弱含水层三维迁移的现场示踪试验  

Three-dimension Migration Test of Radio-nuclides in Weak Phreatic Aquifer

作　　者：王志明[1] 李书绅[1] 刘春立[2] 姜凌[1] 杨月娥[1] 江洪[1] 李冰[1] 李丹[1] 

机构地区：[1]中国辐射防护研究院,山西太原030006 [2]北京大学化学与分子工程学院应用化学系,北京100871

出　　处：《原子能科学技术》2003年第2期149-153,共5页Atomic Energy Science and Technology

摘　　要：对核素在弱含水层中的三维迁移进行了现场试验。试验结果表明:经过1023d的试验,示踪核素90Sr、237Np、238Pu和241Am纵向分布的浓度峰均在最初释放的源层位置未动,迁移最快的90Sr的质心移动了0 32cm;按质心计算,90Sr、237Np、238Pu和241Am的延迟系数(Rd)分别为4 0×102、1 6×103、2 7×105和∞。这表明,黄土介质对这几种示踪核素具有强的吸附能力。A field tracer threedimension migration test in weak phreatic aquifer is conducted. It can be seen from the results of migration test of radionuclides that the peak positions of the radionuclides, 90Sr, 237Np, 238Pu and 241Am, don't move, the mass center of 90Sr, which migrates at fastest velocity among them,only moves 0.32 cm during the 1 023 days, as well as the retardation coefficients, Rd, are 4.0×102 for 90Sr, 1.6×103 for237Np, 2.7×105 for 238Pu and ∞ for 241Am, respectively according to migration velocity of mass center. It shows that loess has stronger sorption capacity for the radionuclides.

关 键 词：三维迁移 现场示踪试验 核素 弱含水层 放射性废物 地层处置 

分 类 号：TL942.1[核科学技术—辐射防护及环境保护]