1. Korea Atomic Energy Research Institute, 111 Daedeok-daero 989 Beon-gil, Yuseong-gu, Daejeon 34057, Korea
2. Seoul National University, Department of Nuclear Engineering, 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Korea
3. Pusan National University, School of Mechanical Engineering, 63-2 Busandaehak-ro, Geumjeong-gu, Busan 46241, Korea