According to the Nuclear Safety and Security Commission (NSSC) Notice No. 2021-26 “Delivery Regulations for the Low- and Intermediate Level Radioactive Waste (LILW)”, the activity of 3H, 14C, 55Fe, 58Co, 60Co, 59Ni, 63Ni, 90Sr, 94Nb, 99Tc, 129I, 137Cs, 144Ce, and gross alpha must be identified. Currently, the scaling factor of the dry active waste (DAW) for LILW is applied as an indirect evaluation method in Korea. The analyses are used the destructive methods and 55Fe, 60Co, 59Ni, 63Ni, 90Sr, 94Nb, 99Tc, and 137Cs, which are classified as nonvolatile nuclides, are separated through sequential separation and then measured by gamma detector, liquid scintillation counter (LSC), alpha/beta total counter (Gas Proportional Counter, GPC), and ICP-MS. We will introduce how to apply the existing nuclide separation method and improve the measurement method to supplement it.

• Heung Nae Lee(Korea Standards Analysis Co. LTD.) Corresponding author
• Kwy Hwan Cho(Korea Standards Analysis Co. LTD.)
• Kyu Kwang Kang(Korea Standards Analysis Co. LTD.)
• Hyeong Min Park(Korea Standards Analysis Co. LTD.)
• Jun Hwi Bang(Korea Standards Analysis Co. LTD.)
• Yun Han Lee(Korea Standards Analysis Co. LTD.)