【摘要】 本文采用国家标准方法 ,对硝酸钠、偏硼酸钠和阳离子交换树脂三种模拟低中放废物水泥固化体在浅地层处置环境地下水中的浸出性能进行了实验研究。实验结果表明 ,浸出实验第 42天时 ,硝酸钠、偏硼酸钠和阳离子交换树脂三种模拟废物水泥固化体中 90 Sr的浸出率分别为 1 .5× 1 0 - 6、8.9× 1 0 - 6和 6 .5× 1 0 - 6cm/d,1 37Cs的浸出率分别为 4.5× 1 0 - 6、1 .3× 1 0 - 6和 1 .4× 1 0 - 5cm/d,均优于标准要求。按浸出结果计算了三种模拟废物固化体中 90 Sr和 1 37Cs的扩散系数 ,可作为低中放废物浅地层处置安全评价研究的源项参数更多还原

【Abstract】 This paper describes study on leaching performance of cement solidified forms of three simulated LILWs, NaNO 3, NaBO 2, and spent cation exchange resin, in the atmosphere of underground water of LILW disposal. The results show that leaching rates of 85 Sr from the three simulated waste forms of NaNO 3, NaBO 2, and spent cation exchange resin are 1.5×10 -6 , 8.9×10 -6 and 6.5×10 -6 cm/d respectively. While for 137 Cs, they are 4.5×10 -6 , 1.3×10 -6 and 1.4×10 -5 cm/d respectively. These are all below the regulatory limits. The diffusion coefficient of 85 Sr and 134 Cs in the three simulated waste forms are derived from the leaching results, which can be used as source term parameter for safety assessment of LILW disposal in near surface facilities.更多还原