 As of December 31, 2011, KEPCO had a total installed generating capacity of 67,001MW produced by 503 generation units including nuclear, oil, coal, liquified natural gas, hydro, wind and solar sources.The length of KEPCO's transmission lines stood at 31,249 circuit kilometers as of end-2011.KEPCO's involvement in the nuclear energy sector ranges from design and engineering of the nuclear power plant to nuclear fuel, commissioning and operation, maintenance and decommissioning.