TOP100 2025 Report - Report - Page 16
Darlington
Nuclear Refurbishment
$12.8 BILLION
The Darlington Nuclear Refurbishment Project was managed in three distinct
phases: Initiation Phase (2007 – 2009); Definition Phase (2010-2015); and
Execution Phase (2016-2026). In november, 2024, OPG announced the completion
of the refurbishment of Unit 1 five months ahead of schedule. The refurbishment
of Unit 1 involved the successful removal and replacement of major components
16
RENEW CANADA – TOP100 2025
2024 Rank: 4
Location: Clarington, Ont.
Owner: Nalcor Energy; Ontario Power Generation
Project/Construction Manager: Aecon Group Inc./ AtkinsRéalis JV (execution
phase of the retube and feeder replacement)
Engineer: Wood (WSP) (environmental)
Contractor: Generation: Andritz Hydro Canada, Astaldi Canada, Barnard-Pennecon JV
Transmission: GE Energy (formerly Alstom Grid Canada and Alstom Renewable
Power Canada), Andritz Hydro Canada, H.J. O’Connell Construction, Valard
Construction; Bird Construction
Other Key Players: E.S. Fox; GE Power; ABB; Amec Foster Wheeler; Deloitte;
Kiewit; Black & McDonald; Tetra Tech; BDI Canada; Burns & McDonnell/Modus
(Independant Project Oversight); Cameco (calandria tubes and annulus spacers);
Alstom AA6Power & Transport Canada Inc. (turbine generator refurbishment);
Hatch (engineering services); Armtec; Accenture (management consultant); Golder
(WSP) (geotechnical services); Dillon Consulting; KPMG; Wood (WSP) (geotechnical
studies)
Supplier: DECAST Ltd.; Laker Energy (nuclear components); Nu-Tech Precision
Metals (calandria tubes)
Legal: Blake, Cassels & Graydon; Torys (acting for the owner)
Funding: Public
Substantial Completion: 2026
of the reactor and its associated equipment including pressure tubes, calandria
tubes and feeder pipes, as well as inspection and upgrades of the turbine generator
equipment. Unit 1 is the third of four units that have been successfully refurbished
to date, with the overall project tracking on-time and on-budget. Unit 4 is tracking
to be completed by 2026.
TOP100PROJECTS.CA
OPG
4
NUCLEAR
