The Experience of Safety System Refurbishment in Wolsong Unit 1

Abstract

Wolsong Unit 1 is a CANDU-6 type nuclear power plant designed by Atomic Energy of Canada Limited (AECL) in Canada. Wolsong Unit 1 has been operating successfully since 1983, and its design life will be expired in November 2012. To renew its operational license for another 10 or 20 years, several refurbishment projects including Periodic Safety Review (PSR) Safety Improvement and Safety System Refurbishment were suggested by Korea Hydro and Nuclear Power Company (KHNP), and have been performed by several domestic organizations and AECL. The PSR Safety Improvement, which includes 2 refurbishment items, has been performing by Korea Power Engineering Company (KOPEC) since December 2007. The Safety System Refurbishment, which includes 15 refurbishment items, has been performing by KOPEC since January 2008. Each refurbishment item and its workscope are briefly summarized herein. These refurbishment items include various engineering works such as fluid systems design, mechanical design, I&C design, civil design, piping design, electric design, procurement support, safety analysis input, licensing support and so on. It is expected that the PSR Safety Improvement and the Safety System Refurbishment could be contributed to the improvement of the safety and reliability of Wolsong Unit 1.