特种水泥固化放射性废离子交换树脂的初步研究

STUDY ON SOLIDIFICATION OF SPENT ION EXCHANGE RESIN USING ASC CEMENT

本文采用一种新型的 ASC特种水泥 ,研究了放射性废离子交换树脂的水泥固化技术。实验得到的最佳配方为 10 0 0 g水泥 + 5 0 0 g树脂 + 35 0～ 4 0 0 m L水 ,据此配方获得的固化体包容量为 4 2 %～4 8% ,其 2 8d抗压强度为 2 0± 2 MPa。第 4 2 d13 7Cs、90 Sr和60 Co的浸出率分别为 :7.92× 10 -5、5 .7× 10 -6和 1.19× 10 -8cm/ d。结果表明 ,该种水泥固化体的抗压强度。

In this paper, a new type of cement, named ASC cement, is used to solidify spent ion exchange resin (IER). The best formula of solidification matrix is:100 g cement+500 g waste resin+350~400 mL water. The strength of the matrix is 20±2 MPa when curied for 28 days. Loading capacity of spent IER is over 42%(v)~48%(v), and leaching rate of 137 Cs, 90 Sr and 60 Co at the 42 nd day is 7.92×10 -5 ,5.7×10 -6 and 1.19×10 -8 cm/d, respectively. The results show that the ASC cement has much better performance than ordinary cement in compression strength, loading capacity and leaching rate. (