After nearly a decade of work, Darlington Nuclear Generating Station has successfully completed the refurbishment of its Unit 4 and reconnected it to the grid at 100% of its capacity. With this, Ontario Power Generation (OPG) celebrates the completion of the largest modernization project in its history, establishing Darlington as a key source of clean and reliable energy for the province of Ontario for the next three decades.
A Decade of Planning and Precise Execution
The Darlington refurbishment project began in 2016 and covered all four units of the station. Unit 4, the last to complete its process, was disconnected in July 2023 and finished its refurbishment in a record time of 968 days. This is the first unit at the station to be refurbished in less than a thousand days, thanks to meticulous planning, the commitment of thousands of workers, and the experience gained throughout the process.
Economic Results Above Expectations
The project was completed with savings of 150 million Canadian dollars and 4 months ahead of the established schedule. This result reinforces OPG’s ability to execute large-scale nuclear projects under high standards of efficiency, budget, and time.
In addition to ensuring energy supply until at least 2055, the refurbishment will generate up to 90 billion dollars in economic benefits for Ontario, support more than 14,000 jobs, and provide enough energy to power 3.5 million homes.
Lessons Learned for the Future of Nuclear Energy
OPG has compiled more than 8,000 lessons learned throughout the project, knowledge that will be key for upcoming challenges in the nuclear sector. Among them, the refurbishment of Pickering Nuclear Generating Station, the installation of small modular reactors (SMRs) at the Darlington site itself, and a large-scale nuclear development in Port Hope.
A Precedent for the Global Industry
Nicolle Butcher, President and CEO of OPG, emphasized the strategic value of the project: “Through this refurbishment we have demonstrated to the world that complex nuclear projects can be completed ahead of schedule and within budget. This experience gives us the confidence, tools, and skills needed to move forward.”
Darlington not only reaffirms itself as a pillar of the Canadian energy system, but also as a global reference in the execution of efficient, sustainable, and visionary nuclear projects.
Source: Ontario Power Generation