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AECL and Korean utility KHNP complete successful retube and refurbishment project
Mississauga, Ontario, CANADA; July 27, 2011 — Atomic Energy of Canada Limited (AECL) and Korea Hydro & Nuclear Power Company Ltd. (KHNP) today announced the completion of the retubing of its Unit 1 CANDU 6 reactor located in Wolsong, South Korea.

The reactor was successfully returned to full power on the Korean electrical grid on July 18, marking the first time that a CANDU 6 reactor has been successfully dismantled, retubed and restarted.
“This final milestone in the Wolsong 1 Retube Project represents the culmination of an enormous effort by KHNP and AECL to safely retube the reactor and to ensure successful operations going forward,” said Hugh MacDiarmid, AECL President and CEO.

“AECL ramped up its capabilities in Wolsong, applying lessons learned from other retube projects, and ultimately proving the future commercial viability of the CANDU retube business.”

The Wolsong reactor retube outage was completed in 839 days, during which KHNP conducted various refurbishment activities. Earlier this year, AECL completed its work on a CANDU reactor (Bruce A, Unit 2) at the Bruce Power Generating Station in Ontario, Canada. AECL is nearing completion on its Bruce A, Unit 1 retube and work at the Point Lepreau Generating Station in New Brunswick, Canada is currently on track to meet its revised schedule.

There are four CANDU 6 plants owned and operated by KHNP in Korea and all have ranked among the world’s top performing nuclear plants. The Wolsong 1 CANDU unit went into operation in 1983 and has achieved a lifetime capacity factor, or operating success rate, of 86.2 per cent. Wolsong Units 2, 3 and 4 were each delivered on time and on budget by AECL in 1997, 1998 and 1999, respectively.

“The outstanding performance of the Wolsong reactors is a testament to the robust Canadian CANDU design and KHNP’s ability to manage and optimize the performance of its reactors,” said Andrew Johnson, AECL’s General Manager responsible for the Wolsong Project.

The retube of Wolsong 1 allows KHNP to build upon its tremendous safe operating record and to provide clean, safe, reliable nuclear power to the people of Korea.

“The Wolsong Retube Project should serve as a model for future international partnerships in which CANDU can deliver economical and reliable electricity production through successful refurbishment and new build contracts,” said MacDiarmid.

Robin Forbes
Manager, External Communications
1-866-886-AECL (2325)






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