One of Bruce Power's nuclear reactors is setting its own ironman record.
The company announced on Tuesday that Unit 5 at Bruce B produced 521 straight days of electrical power beating its previous mark of 520 consecutive days.
The run at Unit 5 joins the three others on Bruce B that have ran for long periods between maintenance.
Unit 6 went 556 consecutive days on February 15, 2013, 487 days at Unit 7 on September 9, 2016, and Unit 8 had the longest at 623 consecutive days on February 13, 2018.
Officials at Bruce Power say with Unit 5 not scheduled to be shut down for maintenance until August, there is a chance it can set Unit 8's site record.
All four units on Bruce B also produces Cobalt-60, a medical isotope used to sterilize single-use medical devices and to fight cancer.