101重水研究堆含氚轻水脱氚方案研究

101重水研究堆(HWRR)是中国第一座核反应堆,现已停堆进入退役准备期。其乏燃料水池和废水贮存罐中存有一定量的含氚轻水,含氚浓度较高,需进行脱氚处理。本文针对HWRR含氚轻水的处理量和含氚浓度,分别评价了3种含氚水脱氚方案:两种联合电解催化交换(CECE1和CECE2)工艺和水蒸馏(WD)工艺。结果表明,与WD相比,CECE工艺的塔径和塔高更小,CECE电解槽的能耗也较WD工艺的蒸发器稍低;两种CECE工艺相比,顶部进天然水的CECE2工艺更适合处理HWRR的含氚轻水。

Study on Detritiation from Tritiated Light Water in 101 Heavy Water Research Reactor

101 Heavy Water Research Reactor (HWRR) in CIAE is the first nuclear reactor constructed in China. It was permanently shut down and is preparing for decommissioning. Since tritium concentration in the light water of spent fuel pool and wastewater tanks is high, the detritiation has to be carried out. Considering the amount and the tritium concentration of the tritiated light water in HWRR, three detritiation processes which are water distillation (WD) process and two combined electrolysis and catalytic exchange (CECE1 and CECE2) processes, were evaluated for the recovery of tritium from the wastewater. It is found that the diameter and height of CECE column are much smaller than those of WD column, and the energy consumption of the electrolyzer in CECE process is smaller than that of evaporator in WD process. With the comparison of CECE1 and CECE2 processes, the CECE2 process with natural water fed to the top of the exchange column is more suitable for the treatment of tritiated light water of HWRR.