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本文研究了以苯乙烯为固化剂,聚合固化核燃料后处理厂产生的废溶剂和核电站产生的废树脂的可能性。对合成条件,固化工艺进行了探索研究。确定了常温、常压下进行固化的工艺条件,并对固化过程中反应热进行了测定,而且,还用核燃料后处理中产生的实际废溶剂(TBP-煤油)和被~(134)Cs 沾污了的废树脂进行了热实验。废溶剂,废树脂两种聚苯乙烯固化体研究结果分述如下:42天浸出率为10~(-6)—10~(-7)和10~(-6)cm/d;累积浸出分数为5×10~(-4)和4×10~(-4)cm;抗压强度为125和180kg/cm~2;包容比为3/5和1/1;减容比为0.40—0.47和0.66—0.87;吸收剂量为10~8rad时,固化体无异常变化;无损伤坠落高度为10m和9m,并且有较好的耐热性和抗燃烧性。实验表明聚苯乙烯固化体性能良好,可以满足长途运输和安全贮存的要求。此外固化工艺简单易用于工程。
In this paper, the possibility of using waste styrene as a curing agent to polymerize and solidify waste solvents from nuclear fuel reprocessing plants and waste resins from nuclear power plants has been investigated. The synthesis conditions, curing process were explored. The conditions of curing under normal temperature and pressure were determined. The heat of reaction during the curing process was also determined. The actual waste solvent (TBP-kerosene) produced in the aftertreatment of nuclear fuel was also measured. Polluted waste resin was subjected to thermal experiments. The results of two kinds of polystyrene solidified bodies, including waste solvent and waste resin, are summarized as follows: the leaching rates in the 42 days are 10 -6 -10 -7 and 10 -6 cm / d; the cumulative leaching fraction 5 × 10 -4 and 4 × 10 -4 cm, the compressive strength was 125 and 180 kg / cm 2, the inclusion ratio was 3/5 and 1/1, and the volume reduction ratio was 0.40-0.47 And 0.66-0.87, respectively. No abnormal changes were observed in the cured product at the absorbed dose of 10 ~ 8 rad. The height of the non-destructive fall was 10 m and 9 m, and had good heat resistance and combustibility. Experiments show that polystyrene cured body performance is good, to meet the long-distance transport and safety requirements. In addition the curing process is simple and easy to use for engineering.