The journey to Darlington Unit 2 refurbishment
A first, historic step for the province
The Darlington Nuclear Generating Station has been a reliable source of power for the province for more than 30 years. In October 2016, after a decade of planning and preparations, OPG and our project partners took the first step on a historic, 10-year journey towards extending the lifetime of the power plant and providing another 30 years of low-cost, reliable and clean energy for Ontarians.
Throughout Unit 2 refurbishment, the project team worked hand in hand with thousands of workers and hundreds of suppliers from across the province to safely deliver on our commitment. Along the way, we incorporated lessons learned from both successes and challenges; developed innovations that improved efficiencies; and, towards the end, adapted to changing conditions in response to the global COVID-19 pandemic. This agile and focused approach ensured each complex task was completed safely and with quality.
In June 2020, following more than three years in the execution phase, we successfully reconnected Unit 2 to Ontario’s grid at 100% full power, returning the first newly refurbished reactor to service a month ahead of our revised schedule.
With the completion of this first of four refurbishments, OPG is demonstrating our commitment to completing the four-unit Darlington Refurbishment in 2026 on time and on budget, and to generating jobs and clean energy for the province.
Unit 2 refurbishment fast facts
24 million hours
worked since 2016
spent on training in the Mock-up and Training Facility
18 of 18
safety and infrastructure projects complete
100,000 work order tasks
Darlington Unit 2 powers on
After more than a decade of planning followed by more than three years of safe, quality work, Unit 2 at Darlington is now back in service.Read more
Darlington’s refurbished Unit 2 reactor returns to service
OPG and its project partners and vendors have successfully completed refurishing Darlington Unit 2 and have reconnected it to Ontario’s electricity...Read more
Darlington Refurbishment includes significant safety enhancements
New safety systems will further enhance defences at OPG's Darlington Nuclear station, which already boasts an excellent safety record.Read more
Darlington Unit 2 achieves major milestone with first criticality
After years of planning and execution on the Darlington Refurbishment, OPG has achieved a historic milestone on Darlington Unit 2.Read more
Darlington Nuclear Unit 2 refurbishment construction now complete
OPG has marked another major milestone in the Darlington Refurbishment project – the completion of construction at Darlington’s Unit 2.Read more
Final stages of Unit 2 reactor construction underway
The installation of lower feeder tubes is currently underway at Darlington Nuclear's Unit 2, with completion targeted for early October.Read more
Darlington Nuclear marks 30 years since first fuel loaded into Unit 2
On June 18, 1989, the first fuel bundle was loaded into Darlington Nuclear Generating Station’s Unit 2 reactor.Read more