【摘要】 针对含60 Co 3 8× 10 5Bq/L、152 Eu 6 67× 10 5Bq/L、总放射性活度为 2× 10 7Bq的放射性废液进行了水泥固化配方及工艺试验研究。结果表明 :水泥浆流动度和初凝时间随水灰比增大而增大 ,而固化体的抗压强度则随其增大而降低。优选配方的水泥固化体各种性能均满足中低放废液固化体性能要求 :水泥浆流动度≥ 130mm ;水泥固化体 2 8d抗压强度 >7MPa ;4 2d浸出率60 Co为1 84× 10 - 4cm/d、152 Eu为 2 76× 10 - 5cm/d(剂灰比 0 15 ) ,60 Co为 5 4 7× 10 - 4cm/d、152 Eu为1 5 5× 10 - 4cm/d(无添加剂 ) ;总 β的累积浸出分数 (4 2d)分别为 1 7× 10 - 2 cm(剂灰比 0 15 )和3 5× 10 - 2 cm(无添加剂 )更多还原

【Abstract】 The cementation formulation and technology for radioactive liquid waste containing 3 8× 10 5 Bq/L 60 Co, 6 67×10 5 Bq/L 152 Eu and total radioactivity 2×10 7 Bq are studied. The results show that both fluidity and setting time increase and the compression strength decreases with increasing water cement ratio. The properties of cement waste forms of recommended formulations meet the characteristic requirements for solidified waste of low and intermediate level liquid waste. The major properties of the cement mortar are as follows: fluidity is greater than 130 mm, compression strength in 28 d is greater than 7 MPa, and leaching rate in 42 d is 1 84×10 -4 cm/d for 60 Co and 2 76×10 -5 cm/d for 152 Eu(additive cement ratio 0.15), 5 47×10 -4 cm/d for 60 Co and 1 55×10 -4 cm/d for 152 Eu(no additive), the accumulative leaching fraction of gross β in 42 d is 1 7×10 -2 cm(additive cement ratio 0.15) and 3 5×10 -2 cm(no additive).更多还原