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CCO.TO ·

Cameco, GE Hitachi, GEH SMR Canada and Synthos Green Energy to Collaborate on Potential Deployment of BWRX-300 Small Modular Reactors in Poland

Corporate Updates

TSX: CCO w e b s i t e : cameco.com

NYSE: CCJ currency: Cdn (unless noted)

2121 – 11th Street West, Saskatoon, Saskatchewan, S7M 1J3 Canada

Tel: 306-956-6200 Fax: 306-956-6201

Cameco, GE Hitachi, GEH SMR Canada and Synthos Green Energy to Collaborate

on Potential Deployment of BWRX-300 Small Modular Reactors in Poland

Saskatoon, Saskatchewan, Canada, September 23, 2021 . . . . . . . . . . . . .

Cameco (TSX: CCO; NYSE: CCJ), GE Hitachi Nuclear Energy (GEH), GEH SMR

Technologies Canada, Ltd. (GEH SMR Canada) and Synthos Green Energy (SGE), a member of

the Synthos Group S.A., have entered into a Memorandum of Understanding (MOU) to evaluate

the potential establishment of a uranium fuel supply chain in Canada capable of servicing a

potential fleet of BWRX-300 small modular reactors (SMRs) in Poland.

Synthos, a manufacturer of synthetic rubber and one of the biggest producers of chemical raw

materials in Poland, is interested in obtaining affordable, on-demand, carbon-free electricity from

a dependable, dedicated source. In 2019 SGE and GEH agreed to collaborate on potential

deployment applications for the BWRX-300 in Poland. SGE and GEH signed a strategic

agreement in 2020 that further advanced the cooperation.

Cameco supplies uranium, uranium refining and conversion services to the nuclear industry

worldwide. In July 2021, Cameco, GEH and Global Nuclear Fuel-Americas (GNF-A) agreed to

explore several areas of cooperation to advance the commercialization and deployment of

BWRX-300 SMRs in Canada and around the world.

“We believe nuclear energy will play a major role in helping countries and companies around the

world achieve their net-zero emission targets,” said Cameco president and CEO Tim Gitzel.

“This MOU is a great example of the kind of innovative solutions businesses like Synthos Green

Energy are exploring and how SMRs could contribute to industry-driven efforts to decarbonize.”

“We look forward to working with Cameco and GEH in understanding the uranium requirements

for a fleet of BWRX-300s in Poland and the support that Canada has to offer,” said Rafał

Kasprów, President of the Board of SGE. “In addition to this MOU, SGE is working closely with

GEH to identify supply chain opportunities in Poland that complement the export capabilities

being developed in Canada for the BWRX-300, which could enable us to successfully deliver

carbon-free electricity to the grid.”

“GEH is honored to be working with Cameco and Synthos Green Energy to deploy the BWRX-

300,” said Jay Wileman, President & CEO, GEH. “Through our collaboration we look forward to

the opportunity to bring carbon-free energy generation to Poland and support the creation of

valuable uranium supply jobs in Canada.”

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The BWRX-300 is a 300 MWe water-cooled, natural circulation SMR with passive safety

systems that leverages the design and licensing basis of GEH’s U.S. NRC-certified ESBWR.

Through dramatic and innovative design simplification, GEH projects the BWRX-300 will

require significantly less capital cost per MW when compared to other SMR designs. By

leveraging the existing ESBWR design certification, utilizing the licensed and proven GNF2 fuel

design, and incorporating proven components and supply chain expertise, GEH believes the

BWRX-300 can become the lowest-risk, most cost-competitive and quickest to market SMR.

This MOU is non-exclusive and non-binding.

Profile

Cameco is one of the largest global providers of the uranium fuel needed to energize a clean-air

world. Our competitive position is based on our controlling ownership of the world’s largest

high-grade reserves and low-cost operations. Utilities around the world rely on our nuclear fuel

products to generate power in safe, reliable, carbon-free nuclear reactors. Our shares trade on the

Toronto and New York stock exchanges. Our head office is in Saskatoon, Saskatchewan.

Caution Regarding Forward-Looking Information and Statements

This news release includes statements considered to be forward-looking information or forward-

looking statements under Canadian and U.S. securities laws (which we refer to as forward-

looking information), including: the intention of Cameco, GEH, GEH SMR Canada and SGE to

evaluate the potential establishment of a uranium fuel supply chain in Canada capable of

servicing SMRs in Poland; SGE’s interest in obtaining affordable, on-demand, carbon-free

electricity; the ability of Cameco, GEH and GNF-A to explore advancing the commercialization

and deployment of BWRX-300 SMRs in Canada and around the world; our view that nuclear

energy will play a major role in achieving net-zero emission targets and the ability of SMRs to

contribute to decarbonization; the efforts of SGE and GEH to identify supply chain opportunities

in Poland that complement export capabilities being developed in Canada for the BWRX-300

that could provide carbon-free electricity in Poland; the potential to create additional uranium

supply-related employment in Canada; the expectation of GEH that the BWRX-300 will require

significantly less capital cost than other SMR designs; and GEH’s belief that the BWRX-300

could become a low-risk, cost-competitive and quickest to market SMR. This forward-looking

information is based on a number of assumptions, including assumptions regarding: the ability of

Cameco, GEH, GEH SMR Canada and SGE to potentially establish a uranium fuel supply chain

in Canada capable of servicing SMRs in Poland; the ability to commercialize and deploy

BWRX-300 SMRs successfully in Canada and around the world; the ability of nuclear energy

and SMRs to contribute to decarbonization; the potential for success in providing carbon-free

electricity in Poland and additional employment opportunities in Canada; the capital cost

requirements for the BWRX-300; and the speed and costs involved in bringing the BWRX-300

to market. This information is subject to a number of risks, including: the risk that a uranium fuel

supply chain to service SMRs in Poland may not be successfully established; the risk that the

BWRX-300 may not be commercialized and deployed within the expected time and at the

expected costs, or at all; the risk that nuclear energy and SMRs may not contribute to

decarbonization to the extent expected; and the risk that it may not prove possible for the parties

to provide carbon-free electricity in Poland or create additional employment opportunities in

Canada. The forward-looking information in this news release represents our current views, and

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actual results may differ significantly. Forward-looking information is designed to help you

understand our current views, and may not be appropriate for other purposes. We will not

necessarily update this information unless we are required to by securities laws.

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Investor inquiries:

Rachelle Girard

306-956-6403

[email protected]

Media inquiries:

Jeff Hryhoriw

306-385-5221

[email protected]