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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
In this paper, the national standard method was used to study the leaching performance of cement solidified body in the groundwater treatment of shallow groundwater by simulating low, medium and mid-leachate of sodium nitrate, sodium metaborate and cation exchange resin. The experimental results showed that the leaching rates of 90 Sr in the three simulated waste cement hardened by sodium nitrate, sodium metaborate and cation exchange resin were respectively 1.5 × 10-6 and 8.9 × 10-6 And 6 .5 × 10 ~ 6cm / d respectively, the leaching rates of 1 37Cs were 4.5 × 10 ~ 6,1 .3 × 10 ~ 6 and 1.4 × 10 ~ 5cm / d, respectively, which were better than the standard Claim. According to the results of the leaching, the diffusion coefficients of 90 Sr and 1 37Cs in three simulated waste solidified bodies were calculated and could be used as the source parameters for the safety assessment of shallow and medium discharges