核级阳离子交换树脂的辐照性能研究

Study on the Irradiation Behaviour of Nuclear Grade Cation Exchange Resins

本文模拟压水堆核电厂水化学环境,利用辐照试验装置进行核级阳离子交换树脂辐照试验,选取新树脂和浸泡树脂,对其辐照后的有机物(TOC)和硫酸根(SO_4^(2-))释放量进行测定、计算和分析,研究核级阳树脂的辐照性能。结果表明辐照对TOC释放量影响较小,但会导致核级阳树脂的磺酸基脱落,产生硫酸根,辐照剂量存在阈值,超过阈值后SO_4^(2-)释放量会显著增加。

In the simulation of nuclear power plant water chemistry irradiation test of nuclear grade cation exchange resins were carried b environment, the y the γ-irradiation apparatus. To study the irradiation behaviour of the resins, the release amount of TOC and sulfate would be measured and analyzed through selecting new resins and bathed resin. The results show that the release amount of TOC would be little effected. But the irridiation dose would be lead to sulfonic acid groups breaking, sulfate radical would be produced. The value of the threshold is efffected by irradiation dose, so, the sulfate radical would be increased sharply as the irradiation dose exceeding the threshold.