核电厂放射性废树脂处理技术研究

Study on Treatment Technology of Radioactive Waste Resin in Nuclear Power Plant

在对放射性废树脂进行处理的过程中,由于反应环境的稳定性难以得到保障,导致废树脂中核素衰变时刻放射性活度速率较慢,为此,提出核电厂放射性废树脂处理技术研究。在废树脂容器材料选择阶段,充分考虑了辐照敏感性和清洁解控下的处理要求,将C15混凝土作为最终的容器材料,并对具体的材料配比进行设计。在处理工艺流程设计阶段,采用了烘干封装形式的HIC放射性废树脂处理方式,定量化地在锥形干燥器中对放射性废树脂进行干燥处理,将蒸发的气态物转入至放射性废液处理系统,将烘干废物移送至HIC封装工位实施二次包装处理。并根据核素检测结果,确定出厂时间。在测试结果中,设计处理技术下,废树脂核素衰变时刻放射性活度在短时间内实现了快速下降,与对照组相比具有明显优势。

In the process of trea ting radioactive waste resin,because the stability of the reaction environment is difficult to be guaranteed,the radioactive activity rate in the spent resin at the time of nuclide decay is slow.Therefore,the research on the treatment technology of radioactive waste resin in nuclear power plant is proposed.In the selection stage of waste resin container materials,the irradiation sensitivity and treatment requirements under cleaning and decontamination are fully considered,and the c15concrete is taken as the final container material,and the specific material proportion is designed.In the design stage of the treatment process flow,the HIC radioactive waste resin treatment method in the form of drying and packaging was adopted.After the radioactive waste resin was quantitatively dried in the conical dryer,the vaporized gaseous substances were transferred to the radioactive waste treatment system,and the drying waste was transferred to the HIC packaging station for secondary packaging treatment.The delivery time shall be determined according to the nuclide test results.In the test results,under the designed treatment technology,the radioactive activity of spent resin nuclide at the time of decay decreased rapidly in a short time,which has obvious advantages compared with the control group.