[en] KEPCO (Korea Electric Power Corporation) opened its HWR program in 1977 by starting the construction of Wolsong 1 (CANDU-6). Wolsong 1 completed its construction in 1983 and has been operated successfully achieving an average lifetime capacity factor of 85%. As far as PHWR technology is concerned, KEPCO did not have self reliance program like PWR but for the PHWR technology development of Korea, KEPCO and AECL made technology transfer agreement for the CANDU-6 NSSS design at the time of Wolsong 3 and 4 contracts. Under this agreement, AECL has provided the CANDU-6 design technology and it is contributing to the development of Korean PHWR design technology. In the field of fuel, KAERI (Korea Atomic Energy Research Institute) is carrying out the feasibility study of CANFLEX and DUPIC. Planning of future CANDU projects in Korea as well as type and capacity if constructed is under study by KEPCO. The economic aspects of CANDU-6, the future prospects of CANDU-9 technology development and availability of construction site will be the important points of study and it will be finished next year. The result of study will be reflected to the new Korean electric power development plan, which will extend Korean power plant construction schedule until 2010