1. Department of Radiation Protection, Pohang Accelerator Laboratory Pohang University of Science and Technology Pohang Gyeongsangbuk‐do Republic of Korea
2. Department of Nuclear Engineering Chosun University Dong‐gu Gwangju Republic of Korea
3. Radiation & Decommissioning Laboratory, Central Research Institute Korea Hydro & Nuclear Power Co., Ltd. Yuseong‐gu Daejeon Republic of Korea
4. Division of Energy & Electrical Engineering Uiduk University Gyeongju Gyeongsangbuk‐do Republic of Korea