Editing Openai/691a304a-7348-8006-acb3-9a6e103bb5bc (section)

===== Incidents that did not (or likely did not) pose significant external risk: =====
* 1983 (pressure tube rupture): Although there was a loss-of-coolant, no radioactive material was released from containment, so no public or environmental release. Canada<ref>{{cite web|title=Canada|url=https://www.canada.ca/en/health-canada/services/health-risks-safety/radiation/radiological-nuclear-emergencies/previous-incidents-accidents.html|publisher=canada.ca|access-date=2025-11-17}}</ref>
* 1988 (operator error, fuel damage): According to sources, radioactive iodine contaminated the cooling system and was “vented … over weeks,” but the exact level of release to the environment and corresponding risk is not clear in publicly cited summaries. Pembina Institute<ref>{{cite web|title=Pembina Institute|url=https://www.pembina.org/reports/energyreport-fullreport_a.pdf|publisher=Pembina Institute|access-date=2025-11-17}}</ref>
* 1990 (power shifts / flux tilt): This was a reactor control issue; not clearly associated with a radioactive release to the environment. Pembina Institute<ref>{{cite web|title=Pembina Institute|url=https://www.pembina.org/reports/energyreport-fullreport_a.pdf|publisher=Pembina Institute|access-date=2025-11-17}}</ref>
* 2020 false alarm: On January 12, 2020, an emergency alert was sent in error, but there was no abnormal release of radioactivity, and authorities stated there was “no danger to the public or environment.” CityNews Toronto<ref>{{cite web|title=CityNews Toronto|url=https://toronto.citynews.ca/2020/01/12/emergency-alert-warns-of-incident-at-pickering-nuclear-plant/|publisher=CityNews Toronto|date=2020-01-12|access-date=2025-11-17}}</ref>