Ontario Power Generation advances Darlington nuclear rehab project

Ontario Power Generation (OPG) is pursuing a number of generation development and other projects in support of Ontario’s electricity planning initiatives.

In an Aug. 12 quarterly financial report, OPG gave these projects as examples:

Darlington Refurbishment

The Darlington nuclear generating units are approaching their originally designed end-of-life. Refurbishment of the units is expected to extend the operating life of the station by approximately 30 years. In January 2016, the Darlington Refurbishment project transitioned from the planning phase to the execution phase. OPG has begun the preparation for the refurbishment of the first unit, Unit 2, and is on track to commence the unit’s refurbishment in the fourth quarter of 2016.

The Government of Ontario’s support for the Darlington Refurbishment project has been affirmed through the Minister of Energy’s announcement in January 2016 endorsing OPG’s plan to refurbish the four Darlington units. OPG plans to commence subsequent unit refurbishments after Unit 2 is successfully returned to service, and expects to seek the province’s concurrence prior to proceeding with subsequent unit refurbishments.

Once refurbished, Unit 2 is scheduled to be returned to service in the first quarter of 2020, at which time capital expenditures of approximately C$4.8 billion are planned to be placed in service. This includes expenditures incurred during the definition and planning phase of the project.

Preparation activities on the major sub-projects are progressing in line with the first unit’s refurbishment schedule. The manufacturing of the specialized tooling that will be used to remove and replace fuel channel assemblies and feeder tubes in each reactor has been completed, and the tooling was delivered to OPG’s reactor training and mockup facility in the second quarter of 2016, as planned. Extensive tool testing and refurbishment task rehearsals are in progress at OPG’s full-scale reactor mock-up facility. All of the tools and materials required to de-fuel the Unit 2 reactor also have been delivered.

De-fueling is the first critical refurbishment activity once the unit is removed from service. Execution of pre-breaker open work to support the first unit’s refurbishment continues and is expected to be substantially completed prior to the commencement of refurbishment activities on the first unit.

Project support activities and activities in support of requirements set out in the Canadian Nuclear Safety Commission (CNSC) approved Integrated Implementation Plan for the Darlington GS are also underway. Prerequisite projects including construction of facilities, infrastructure upgrades and installation of safety enhancements have either been completed or are tracking to be completed in line with the refurbishment execution schedule.

Peter Sutherland Sr. GS

The project to construct the Peter Sutherland Sr. hydroelectric station is tracking on budget and on schedule. Construction work on the project continued during the second quarter of 2016, including the completion of the coffer dam rebuild, headpond clearing activities, power house concreting and slope stabilization of the intake canal. Work continues to progress on the powerhouse superstructure and spillway concreting.

About Barry Cassell 20414 Articles
Barry Cassell is Chief Analyst for GenerationHub covering coal and emission controls issues, projects and policy. He has covered the coal and power generation industry for more than 24 years, beginning in November 2011 at GenerationHub and prior to that as editor of SNL Energy’s Coal Report. He was formerly with Coal Outlook for 15 years as the publication’s editor and contributing writer, and prior to that he was editor of Coal & Synfuels Technology and associate editor of The Energy Report. He has a bachelor’s degree from Central Michigan University.