Evaluation of occurrence and distribution of natural radionuclides in groundwater of Korea

Sang Woong Yun, Kangwon National University, Department of Geology, Chuncheon, Korea, Republic of (South), Jin-Yong Lee, Kangwon National University, Department of Gelogy, Chuncheon, Korea, Republic of (South) and Yu-Chul Park, Kangwon National University, Department of Geophysics, Chuncheon, Korea, Republic of (South)