As part of our commitment to keep you informed, this report tracks performance for Ontario Power Generation’s (OPG’s) Pickering Nuclear in the areas of safety, operational and environmental performance and significant accomplishments during the fourth quarter of 2021.
4.4 TWh
Electricity production
The electrical energy generated, minus station needs
OPG’s nuclear electricity generation for Q4 of 2021 totalled 8.4 terawatt hours (TWh) compared to 9.8 TWh in 2020 in the same quarter. In Q4, Pickering Nuclear produced 4.4 TWh of electricity, which was 12 per cent of the electricity produced in Ontario.
78.12% UCF
Reliability
Unit capability factor
Compared to Q4 in 2020, Pickering’s Unit Capability Factor (UCF) for Q4 2021 was lower (78.12) primarily due to an increase in the number of days the station was shut down for maintenance outages.
1 spill
Environment
Spills to the environment
During Q4 2021, Pickering Nuclear recorded one spill to the environment that was reportable to a regulatory authority. Pickering Nuclear had a total of one reportable spill in 2021.
0.10 TRIF
Safety
Total Recordable Injury Frequency
Total Recordable Injury Frequency (TRIF) measures the number of injuries involving OPG employees that result in a fatality, lost time, requiring restricted work and requiring medical treatment per 200,000 hours. In Q4 2021, Pickering Nuclear recorded 0.10 injuries per 200,000 hours worked.
About OPG’s Nuclear Generating Stations
OPG owns and operates the Pickering and Darlington Nuclear Generating Stations. The two stations have a combined generating capacity of about 5,728 megawatts with Darlington Unit 1 & 3 currently in a refurbishment outage. Accounting for 22% of the electricity produced in Ontario in Q4, OPG’s nuclear units generated 8.4 terawatt hours.
4.4 TWh 
1 spill
