AtkinsRéalis—and Candu—is the OEM for the CANDU technology. We're actively marketing the CANDU technology globally on behalf of the Government of Canada.
When it comes to the small modular reactor space, yes, we are an engineering firm of 42,000 people that's been based in downtown Montreal for over 115 years now. It's an engineering firm that has nuclear expertise globally. We are the architect engineer and the project engineer on behalf of OPG and GEH at the SMR that's currently under construction at the Darlington new nuclear site here in Ontario.
We're also, through our U.K. office, working with Rolls-Royce and the small modular reactor in the U.K. South of the border, we've been working with X-energy. We've been working with Natrium as well, which is the Bill Gates reactor. We have global expertise, and each of our offices around the world is working on small modular reactors.
When it comes to the BWRX-300 small modular reactor from GVH that's being built in Ontario right now, certainly when that reactor gets exported globally there will be a benefit to Ontario and there will be a benefit to Canada, but it's nowhere near the benefit that will come from building CANDUs abroad. We talked about some of the numbers. Building, let's say, a stand-alone CANDU unit in an international jurisdiction will have a massive multi-billion-dollar impact on GDP here in Canada. Yes, there will be an impact from the SMR, but that technology and IP rests in the United States. It will be subject to export controls and all of those things.
There is one Canadian technology, and that's the CANDU reactor. If we're looking to get the biggest bang for the buck and see the biggest impact in our country, then there's no question that CANDU, with 96% of its components being manufactured in Canada, will have a massive impact. I'm glad to see that the federal government understands that.