As part of our commitment to keep you informed, this report tracks performance for Ontario Power Generation’s (OPG’s) Darlington Nuclear in the areas of safety, operational and environmental performance and significant accomplishments during the first quarter of 2022.
4.7 TWh
Electricity production
The electrical energy generated, minus station needs
OPG’s nuclear electricity generation for Q1 of 2022 totalled 10.3 terawatt hours (TWh) compared to 8.9 TWh in 2021 in the same quarter. In Q1, Darlington Nuclear produced 4.7 TWh of electricity, which was 11 per cent of the electricity produced in Ontario.
99.86% UCF
Reliability
Unit capability factor
Compared to Q1 in 2021, Darlington’s Unit Capability Factor (UCF) for Q1 2022 is higher (99.86) primarily as a result of an increase in the number of days the station has been shut down for maintenance outages.
0 spills
Environment
Spills to the environment
During Q1 2022, there were no spills to the environment at Darlington Nuclear reportable to a regulatory authority.
0.3 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 Q1 2022, Darlington Nuclear recorded 0.3 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 4,850 megawatts with Darlington Unit 1 and Unit 3 currently on refurbishment. Accounting for 24.9 per cent of the electricity produced in Ontario in Q1, OPG’s nuclear units generated 10.3 terawatt hours.
4.7 TWh 
0.3 TRIF
