The Ontario Power Generation (OPG) said that fuel loading had begun at Darlington Unit 2, where a refurbishment project was reported in September to be 90 percent complete.
Work on Unit 2 was begun in October 2016 after a five-year planning process involving OPG and BWXT. The goal was to refurbish all four Darlington unit in a $9 billion project expected to take 10 years to complete. The target date for completion is 2026, although OPG also said this week that work on Unit 3 would not commence until the second quarter of 2020, a delay of about three months due to revising the engineering plan for the project based on more than 3,000 documented lessons the company will apply to the project going forward.
By September of this year, 960 feeder tubs had been installed and 40 of 58 major plant systems were ready to go for the 878 MWe (net) CANDU reactor.
Work on Unit 2 involved defueling the core, then isolating the reactor from the rest of the plant. Four-hundred-eighty fuel channels were removed, inspected and replaced, including feeder tubes and calandria tubes.
OPG said the Unit 2 project, now considered 94 percent complete, was on time and within the established budget constraints. The safety record on the project so far, with 19.8 million man-hours put into it, involved just one Lost Time Accident, which took place in the second quarter of this year. The unit is expected to return to service in the second quarter of 2020.
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