本研究運用TEVA樹脂前處理技術，結合ICP-MS感應耦合電漿質譜儀對蘭嶼儲存場低放射性廢棄物Tc-99進行濃度定量分析，結果顯示此方法與傳統運用低背景值液態閃爍計數器比較時將會低兩個級數，目前低放射性廢棄物Tc-99濃度僅是運用Tc-99/Cs-137校正因子推估，會導致Tc-99濃度高估情形，造成廢棄物處理成本大幅增加，故有需要重新檢視此種推估方法正確性。另外我們使用RO逆滲透薄膜濾除低放射性廢料溶液，運用LA-ICP-MS量測核種以評估RO逆滲透薄膜濾除效果，結果證實溶液中添加APDC錯合劑，鈷的濾除效果從68%增加至84%;銫的濾除效果從55%增加至71%;鍶的濾除效果從20%增加至34%，推測為溶液中APDC與金屬離子形成錯合，產生共沉澱效果增加RO逆滲透膜濾除效果，同時運用雷射剝蝕RO逆滲透薄膜表面及不同深度的金屬分佈情形時亦得到相同驗證。

In this study, we demonstrated that by adopting the analytical method comprising TEVA resin pretreatment and ICP-MS measurement, the determined Tc-99 concentrations in representative waste stream samples from the Lan-Yu low-level radioactive waste temporary storage site in Taiwan were approximately two orders of magnitude lower than those determined from the beta radiation measurement using a low background liquid scintillation counter. The currently used Tc-99/Cs-137 scaling factor should be carefully revised, or it might lead to a considerable overestimation of the Tc-99 concentration. Another, we used LA-ICP-MS to visualize the fouling induced by seeded filtration for efficient removing liquid low-level radwaste relevant nuclides using a reverse osmosis (RO) membrane. Evidenced by a significant permeate flux drop, these APDC additives pronouncedly increased the rejection from 68 % to 84 % for cobalt, 55 % to 71 % for strontium, and 20 % to 34 % for cesium. This suggested that the improved rejection is closely related to the formation of APDC-metal complexes, and the possible coprecipitation of these elements with APDC-metal complexes.

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