RC119 JulyAugust 2025 - Magazine - Page 21
To ensure a successful buildout, OPG will be leveraging
more than 7,000 lessons learned from its Darlington Refurbishment project, which remains on track to be completed
by 2026. The company will also incorporate lessons learned
from the construction of the 昀椀rst SMR to the rest of the 昀氀eet.
The Province’s approval to proceed comes after OPG
received a Licence to Construct the 昀椀rst SMR unit in April
from the Canadian Nuclear Safety Commission.
On the ground, the project team has been busy preparing
for this pivotal moment, including advancing site
preparation work and procuring long-lead components.
Since Fall 2022, dozens of trucks have been busy
relocating clean soil across the site to level out the lands
intended for the future SMR units. Crews have also
been busy installing various utilities, including 昀椀re lines,
water lines, sanitary sewer lines, and network cabling.
Construction on a few important buildings, including the
on-site fabrication building, is also progressing well.
Meanwhile, the team continues to excavate for the
Reactor Building shaft—a critical milestone—in preparation
for construction of the reactor building.
To support a 昀氀eet of SMRs, the DNNP team has worked
to secure several long-lead items, including the reactor
pressure vessel. As the SMR’s largest component, the
vessel will contain the reactor core, coolant, and support
structures. Measuring over 30 metres in length and over
six metres in diameter, and weighing 550 tonnes, this is a
positively massive piece of equipment.
Meanwhile, the generator rotor—a key component of
the turbine-generator system that converts heat from the
reactor into electrical power—has been forged and is now
undergoing pre-machining. It’s expected to arrive at the
project site by summer 2027.
“This made-in-Ontario project will support
provincial companies, create jobs for Ontarians,
and spur growth for our economy.”
Finally, later this summer, the project’s heralded tunnel
boring machine—nicknamed “Harriett Brooks” after
Canada’s 昀椀rst female nuclear physicist—will arrive from
Germany at the new nuclear site for storage until assembly
in early 2026. Once operational, the massive machine will be
used to drill the condenser cooling water tunnel, which will
measure 3.4 kilometres long and 6.05 metres in diameter.
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