No Candu’s operating life has ever been extended beyond its design life. The industry has no experience with this. As reactors age the likelihood of an accident increases due to the degradation of components. Why risk an accident on our Great Lake?
The Pickering nuclear station has a greater risk of accident than other nuclear stations because the containment and Emergency Core Cooling System are shared between all reactors at the A and B stations. Fukushima highlighted the risks of operating multiple reactors at the same site, but they had separate safety systems. Pickering has multiple reactors at the same site that share safety systems in order to save money. Indeed, they are theonly reactors in the western world with only one emergency shutdown system.
The Pickering station is also closer to a large urban centre (Toronto) than any other nuclear plant in the world. For that reason, regulatory authorities would never allow a new plant to be built at Pickering today. During the Fukushima disaster, 150,000 people were evacuated in the 20 km area around the station. By comparison, 1.3 million live within 20 km of Pickering, and millions live within the Greater Toronto Area. An accident would be disastrous; indeed we could never evacuate that many people.