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Energy Fuels Enters into MOU to Secure Near-Term, Large-Scale Australian Source of Rare Earth Minerals to Supply New U.S.-Based Supply Chain for Decades Energy Fuels and Astron Corporation execute non-binding MOU to jointly develop the Donald Mineral

Partnerships & JV

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Energy Fuels Enters into MOU to Secure Near-Term, Large-Scale Australian Source of Rare Earth

Minerals to Supply New U.S.-Based Supply Chain for Decades

Energy Fuels and Astron Corporation execute non-binding MOU to jointly develop the Donald Mineral

Sands Project, a large heavy mineral sand deposit that has the potential to supply Energy Fuels with

approximately 7,000 tonnes of rare earth-bearing monazite sand per year starting in 2026, ramping up

to 14,000 tonnes per year soon thereafter.

LAKEWOOD, Colo., Dec. 27, 2023 /CNW/ - Energy Fuels Inc. (NYSE American: UUUU) (TSX: EFR) ("Energy

Fuels" or the "Company" ), a leading U.S. producer of uranium, rare earth elements (“ REE”), and

vanadium, is pleased to announce that it has entered into a non-binding Memorandum of Understanding

(“MOU”) with Astron Corporation Limited (“Astron”) to jointly develop the Donald Rare Earth and Mineral

Sands Project, located in the Wimmera Region of the State of Victoria, Australia (the “ Donald Project”).

The MOU describes indicative commercial terms and provides Energy Fuels with a binding exclusivity

period to end on March 1, 2024, during which Energy Fuels will be entitled to conduct due diligence and

the parties will negotiate definitive agreements.

The Donald Project is a world -class, world scale, ‘shovel-ready’ critical mineral deposit that Energy Fuels

believes would provide it with another near-term, low-cost, and large-scale source of monazite sand in an

REE concentrate (“REEC”) that would be transported to the Company’s White Mesa Mill in Utah, USA (the

”Mill”) for processing into REE oxides and other advanced REE materials and recovery of the contained

uranium. Energy Fuels is announcing this non-binding MOU at this time, because Astron has determined

that it is required to announce the MOU at this time under applicable Australian Securities Exchange

(“ASX”) rules.

With supportive U.S. government policies, and U.S. and European companies increasingly focused on

security of supply, Energy Fuels is rapidly creating a new significant REE supply chain that can reduce

America’s reliance on REE’s from China. As part of this strategy, the Company is actively securing long-term

sources of REEC through offtake (Chemours), joint venture (Astron), and direct ownership (the Company’s

100% owned Bahia Project in Brazil). Through these assets and potentially others, Energy Fuels is building

a world significant REE oxide supply chain that the Company believes will be attractive to EV manufacturers

and their Tier 1 suppliers.

THE DONALD PROJECT

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With Energy Fuels’ proposed investment of approximately A$180 million (approximately US$122 million

at current exchange rates), and most licenses and permits in place (or at an advanced stage of completion),

the Donald Project (see Figure 1) is expected to soon be a new, long-term source of several critical minerals

key to the clean energy transition, including REE’s, titanium, zir con, and uranium. The Donald Project is

expected to provide Energy Fuels with 7,000 to 14,000 metric tons (“tonnes”) of REEC per year, containing

4,000 to 8,200 tonnes of total REE oxides (“ TREO”), with commissioning and ramp-up expected to begin

in 2026. Most of Energy Fuels’ proposed investment is expected to be disbursed in 2025.

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Figure 1 - The Donald Project Joint Venture Area (Blue), along with the Jackson Deposit (Red) where the Company holds a right

of first refusal on development

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This annual quantity of REEC contains roughly 850 to 1,700 tonnes of neodymium-praseodymium (“NdPr”)

oxide, 70 to 140 tonnes of dysprosium (“Dy”) oxide and 12 to 25 tonnes of terbium (“Tb”) oxide. The REEC

from the Donald Project is also expected to contain approximately 50,000 to 100,000 pounds of low-cost

recoverable uranium per year, which, in addition to the Company’s large-scale uranium production from

its numerous US mines and other sources, would be sold to the U.S. nuclear industry for the generation of

clean, carbon-free electricity.

NdPr, Dy and Tb are known as the “magnet rare earths,” as they are key ingredients in powerful permanent

REE magnets used in the most efficient electric vehicles (“ EVs”), wind generators, and other defense -

related and advanced technologies. For scale, REEs provide significantly greater power and range for EVs,

and the typical REE-powered EV uses about one kilogram (“kg”) of NdPr oxide per vehicle. Therefore, the

Donald Project could supply enough of these critical elements for up to 1.4 million EVs per year.

The following tables summarize the updated Ore Reserve Statement for the Donald Project, prepared in

accordance with the Australasian Code for Reporting of Exploration Results, Mineral Resources and Ore

Reserves, 2012 Edition (“2012 JORC Code”), as of June 27 , 2023. The Company is treating the Mineral

Reserves disclosed in the table below as historical in nature as a Qualified Person (“QP”) for the Company

has not conducted the due diligence necessary to classify these as current Mineral Reserves. There can be

no assurance that additional due diligence work will convert the historical Mineral Reserves to current

Mineral Reserves under S-K 1300 and NI 43-101:

MIN5532

% of total HM

Tonnes HM Slimes Oversize Zircon Rutile + Anatase Ilmenite Leucoxene Monazite Xenotime Classification (Mt) (%) (%) (%)

Proved 263 4.4 15.4 9.8 16.7 5.5 21.6 25.9 1.8 0.67

Probable 46 4.1 19.7 11.1 15.3 5.5 21.3 20.1 1.8 0.64

Total 309 4.4 16.1 10.0 16.5 5.5 21.6 25.1 1.8 0.66

Notes:

1) The ore tonnes have been rounded to the nearest 1 Mt and grades have been rounded to two significant figures.

2) The Ore Reserve is based on Indicated and Measured Mineral Resources contained within the mine designs above an economic cut-off.

3) A break-even cut-off has been applied defining any material with product values greater than processing cost as Ore.

4) Mining recovery and dilution have been applied to the figures above.

5) The area is wholly within the mining license (MIN5532).

6) The rutile grades are a combination of rutile and anatase minerals.

7) The Ore Reserve estimates have been compiled in accordance with the guidelines defined in the 2012 JORC Code.

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THE DONALD PROJECT JOINT VENTURE:

The MOU sets out in broad terms the basis upon which the parties would enter into an Australian

incorporated Joint Venture (the “Venture”) covering the tenements MIN5532 and RL2002, which together

form the Donald Deposit (see the attached figure). The MOU provides for the continuation of due diligence

by Energy Fuels and the negotiation of definitive and binding agreements governing the Venture. The

transactions contemplated by the MOU, including formation of the Venture, are conditional on a number

of factors, including the Company being satisfied with the results of its due diligence investigations and

the ability of the parties to successfully negotiate and enter into definitive and binding agreements. There

can be no assurance that the Company will enter into definitive agreements to govern the Venture, or if

entered into that the terms will be as set out in the MOU.

The MOU contemplates that the Venture would initially consist of operations to mine 7.5 million tonnes

per year of ore to produce approximately 200,000 to 250,000 tonnes per year of heavy mineral

concentrate (“HMC”) and approximately 7,000 to 8,000 tonnes per year of monazite -bearing rare earth

element concentrate (“REEC”) (“Phase 1”). It is further contemplated that, as soon as practicable after

commencing Phase 1 commercial production, the Venture would double ore production to 15 million

tonnes per year to produce approximately 400,000 to 500,000 tonnes per year of HMC and approximately

13,000 to 14,000 tonnes per year of REEC (“Phase 2”) for decades to come.

The MOU provides for Energy Fuels to invest A$180 million (approximately US$122 million at current

exchange rates) to earn a 49% interest in the Venture, most of which is expected to be spent in 2025. In

addition, the Company w ould issue to Astron common shares having a value of US$17.5 million in

consideration of RL2002 being included in the Venture to cover the entire Donald Deposit.

RL2002 outside of MIN5532

% of total HM

Tonnes HM Slimes Oversize Zircon Rutile + Anatase Ilmenite Leucoxene Monazite Xenotime Classification (Mt) (%) (%) (%)

Proved 152 5.6 7.1 18.8 21.1 9.4 31.3 18.2 1.8

Probable 364 4.1 13.7 15.7 17.1 7.5 32.8 19.3 1.6

Total 516 5.6 11.7 16.6 18.6 8.2 32.3 18.9 1.7

Notes:

1) The ore tonnes have been rounded to the nearest 1 Mt and grades have been rounded to two significant figures.

2) The Ore Reserve is based on Indicated and Measured Mineral Resources contained within the mine designs above an economic cut-off.

3) The economic cut-off is defined as the value of the products less the cost of processing.

4) Mining recovery and dilution have been applied to the figures above.

5) The updated RL2002 Ore Reserve does not include an announced figure on xenotime due to historical samples used in the Ore Reserve

calculation not being analyzed for xenotime.

6) The rutile grades are a combination of rutile and anatase minerals.

7) The Ore Reserve estimates have been compiled in accordance with the guidelines defined in the 2012 JORC Code.

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Energy Fuels’ investment of A$180 million is expected to satisfy most of the equity capital requirements

for the construction of the Phase 1 project. Astron, with a 51% interest, would be the Manager and

Operator of the Venture, with specified major decisions subject to approval of both parties. Any future

Venture expenditures, including development of Phase 2, would be funded by Energy Fuels and Astron on

a pro-rata basis.

The MOU contemplates that under the Venture, Energy Fuels would enter into an offtake agreement for

100% of the Donald Project’s Phase 1 and Phase 2 REEC production based on market prices of contained

rare earth elements. Astron w ould have the right, but not the obligation, to enter into an offtake

agreement with the Venture for up to 100% of the HMC product at market prices. Following payment of

all joint venture expenses, all profits from the Venture would be distributed to Energy Fuels and Astron,

pro-rata according to their respective ownership percentages.

The MOU also provides that the agreements will provide Energy Fuels with a first right of refusal over

participation in the development of Astron’s Jackson Deposit which is contained in the tenement RL2003

and adjoins the Donald Deposit to the south -west (see the attached figure). The Donald Deposit and the

Jackson Deposit, together, form the Donald Rare Earth and Mineral Sands Project.

The Donald Project would greatly supplement Energy Fuels’ other near-term monazite supplies. Earlier in

2023, Energy Fuels announced the acquisition of its 100% owned Bahia Mineral Sand Project, which is

comprised of 60+ square miles of mineral concessions in Brazil containing large in -ground heavy mineral

sand resources, including monazite. The Company is currently completing a sonic drill program at the Bahia

Project to expand the heavy mineral sand resources and guide mine planning and additional permitt ing.

The Bahia Project is expected to commence production in 2026, producing in the range of 3,000 to 10,000

tonnes of REEC per year.

Therefore, between the Bahia Project and the Donald Project, Energy Fuels would control roughly 10,000

to 24,000 tonnes of low-cost REEC per year, containing approximately 1,150 to 2,700 tonnes of NdPr along

with significant quantities of “heavy” REEs and uranium for decades to come. The Company is continuing

to evaluate additional opportunities to secure low-cost, large-scale monazite concentrates globally.

ENERGY FUELS’ NEW U.S.-CENTRIC RARE EARTH SUPPLY CHAIN:

For the past four years, Energy Fuels has been developing a secure, U.S. -centric REE oxide supply chain

that sources monazite concentrates from the US and around the world. Monazite is an excellent source of

REE’s, as it has superior distributions of the ‘magnet’ REE’s versus other minerals. Energy Fuels is utilizing

excess capacity at the Mill, and installing additional infrastructure, to produce advanced REE materials,

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including mixed REE carbonate and separated REE oxides. The Mill is the only operable conventional

uranium mill in the U.S., and these REE capabilities are additive to the Company’s uranium production

capabilities.

Energy Fuels is utilizing the Mill for REE recovery, as most major REE-bearing minerals, including monazite,

bastnaesite, ionic clays, xenotime, and others, contain uranium, thorium, and other radioactive elements

that become concentrated through the REE e xtraction process. Therefore, companies that process REE -

bearing minerals must have the licenses, infrastructure, tailings capacity, and expertise in radioactive

hydrometallurgy to properly manage, process, recover, and/or dispose of uranium, thorium and o ther

radioactive elements. As a result, the Company believes the Mill is an ideal facility to perform these

functions, as it already possesses these attributes and is further able to recover the associated uranium

for beneficial use. The Mill is licensed and constructed in the United States and overseen by an array of

federal and state government agencies with expertise in the processing of radioactive materials. The Mill

has an exceptional record of regulatory compliance and operates to the highest global standards for the

protection of human health and the environment.

Furthermore, the proven processing method for producing high purity separated REE oxides is solvent

extraction (“SX”), and the Mill has been utilizing SX for over 40 years to produce high-purity uranium and

vanadium oxides. Therefore, it has not been difficult for Energy Fuels to deploy this institutional knowledge

and experience with relatively minor Mill modifications to produce mixed REE carbonates since 2021 and

to begin producing separated REE oxides, expected in early 2024, that meet applicable specifications.

As previously announced, the Company is currently installing a “Phase 1” REE separation circuit (the

“Phase 1 REE Separation Circuit ”) within the Mill’s existing SX building that will have the capacity to

process 8,000 to 10,000 tonnes of REEC per year and produce up to 1,000 tonnes of high-purity NdPr oxide

per year. Based on current committed REEC supplies, the Company expects to pro duce 40-50 tonnes of

NdPr oxide in 2024, while continuing to negotiate for the procurement of additional feedstock. The Mill

has pilot-tested NdPr separation at its in -house laboratory for over two years, which has allowed the

Company to compile extensive real- time data that it is using to design and optimize its soon -to-be-

operational NdPr circuit. As previously announced, the Phase 1 REE Separation Circuit is expected to be

operational in Q1-2024. Also in Q1-2024, the Company plans to perform pilot-scale testing on “heavy” REE

separation, including the production of high -purity Dy and Tb oxides, along with potentially samarium

(“Sm+”) oxides and others.

The Company is also in the process of designing a “Phase 2” REE separation circuit (the “ Phase 2

Separation Circuit”) and a “Phase 3” REE separation circuit (the “Phase 3 Separation Circuit”) at the Mill.

The Phase 2 Separation Circuit, which is currently expected to be completed in 2027, subject to receipt of

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any required regulatory approvals and the Company securing sufficient supplies of REEC, will consist of

expanding NdPr oxide capacity to process between 30,000 and 40,000 tonnes of REEC per year and

produce approximately 3,000 to 4,000 tonnes of NdPr oxide per year. The Company also plans to construct

a dedicated “crack-and-leach” circuit in conjunction with its Phase 2 Separation Circuit, in order to allow

the Mill to simultaneously process conventional uranium ore and REEC independently, thereby allowing

for more efficient utilization of Mill capacity. The Phase 3 Separation Circuit, which is currently expected

to be completed in 2028, subject to receipt of any required regulatory approvals, will consist of installing

the capacity to produce “heavy” REE ox ides, including Dy, Tb, and potentially Sm and other oxides. The

Company continues to evaluate opportunities to enter the REE metal, alloy, and magnet-making space, in

order to fully-integrate the entire REE magnet supply chain.

Assuming completion of the transactions contemplated by the MOU and formation of the Venture, the

Company would expect to receive Phase 1 quantities of REEC from the Donald Project commencing in

2026. The Phase 1 quantities of REEC from the Donald Project would then be processed through the Mill’s

Phase 1 Separation Circuit, which is expected to be completed in 2024, for the production of NdPr oxide,

with the heavies, Tb and Dy, either stockpiled at the Mill for future processing for the recovery of Tb and

Dy in the Mill’s Phase 3 Separation Circuit when constructed (currently expected to be in 2028) or sold as

an SM + carbonate to third parties in the interim. The Company currently expects that the Phase 2

Separation Circuit at the Mill will be completed prior to receipt of Phase 2 quantities of REE from the

Donald Project.

MARK S. CHALMERS, PRESIDENT AND CEO OF ENERGY FUELS STATED:

“Energy Fuels is working to secure future large-scale in-situ rare earth element projects around the world,

which we expect to become low -cost sources of feed to supply our U.S. -centric REE supply chain in the

coming years. Earlier in 2023, we acquired the Bahia Project in Brazil, and now we are working toward

partnering with Astron on the Donald Project in Australia. Energy Fuels’ goal is to source monazite from

the US and around the World and become a reliable, globally diversified, multi- decade supplier of U.S.-

produced magnet REE oxides to EV manufactures and other end-users. Our announcement today should

help people ‘connect -the-dots’ to better understand the magnitude of our burgeoning REE business

strategy. We are earning into an essentially ‘de-risked’ heavy mineral sand project that is in Australia, has

many years of detailed resource and project evaluation, and has all the main regulatory approvals in place

or well-advanced.

“And we are able to develop this U.S. -centric REE supply chain without diminishing our U.S. -leading

uranium production capability in any way. Uranium will always continue to be our primary focus. However,

REE and uranium production go hand-in-hand, as the REEC from the Donald Project contains decades of