Oklo Nuclear Fuel Strategy Explained: HALEU, Centrus, Fuel Recycling and Surplus Plutonium

Summary

Nuclear fuel is one of the most important constraints facing Oklo's plan to deploy Aurora powerhouses at scale.

The fuel strategy is broader than simply buying uranium.

It includes:

Uranium

↓

Enrichment to HALEU

↓

Deconversion / Fuel Fabrication

↓

Aurora

while also developing:

Used Nuclear Fuel

↓

Recycling

↓

Recovered Nuclear Material

↓

Future Fuel

Oklo is also exploring authorized use of U.S. surplus plutonium as potential bridge fuel while domestic advanced-fuel infrastructure expands.

What Is HALEU?

HALEU stands for:

High-Assay Low-Enriched Uranium

It contains a higher concentration of uranium-235 than conventional light-water-reactor fuel while remaining below the enrichment level associated with highly enriched uranium.

Many advanced-reactor designs use HALEU to support:

• More compact cores;
• Different fuel cycles;
• Longer operating periods.

Why HALEU Is a Bottleneck

The U.S. advanced-reactor industry is attempting to scale faster than the domestic HALEU supply chain.

Fuel must move through several steps:

Mining

↓

Conversion

↓

Enrichment

↓

Deconversion

↓

Fuel fabrication

A bottleneck in any stage can delay reactor deployment.

What Is the Centrus LOI?

On June 18, 2026, Oklo and Centrus announced a Letter of Intent.

Centrus intends to provide enough domestic HALEU to support multiple years of operation for up to five Aurora powerhouses at Oklo's planned Ohio campus.

Deliveries are scheduled to begin in 2029.

Is This a Final Fuel Contract?

No.

The announcement explicitly says the LOI anticipates a future definitive contract.

Therefore the correct language is:

Oklo has taken an important step toward securing HALEU supply.

Not:

Oklo's Ohio fuel supply is fully guaranteed.

Why 2029 Is Important

Oklo's Ohio project currently targets first-phase operation in 2030.

HALEU deliveries beginning in 2029 would therefore align fuel availability with the planned early deployment window.

That schedule still depends on both companies fulfilling future commitments.

What Is HALEU Deconversion?

After uranium is enriched, it still needs to be converted into a suitable chemical or material form before fuel fabrication.

Oklo and Centrus announced plans in March 2026 to explore a joint venture focused on HALEU deconversion and related fuel-cycle services in Ohio.

This matters because enrichment alone does not create reactor-ready fuel.

Why Vertical Integration Matters

A company that controls more of:

• Fuel;
• Manufacturing;
• Reactor construction;
• Operations

may reduce dependence on suppliers.

But vertical integration also requires:

• Capital;
• specialized personnel;
• regulatory approvals;
• execution across several businesses.

It therefore reduces some risks while creating others.

What Is Oklo's Fuel Recycling Strategy?

Oklo is developing technology intended to recover useful nuclear material from used fuel.

Its official fuel-recycling page says conventional reactors use only a fraction of the energy content of nuclear fuel and that Oklo is developing recycling technology to recover useful material for advanced reactors.

The company is developing a privately funded advanced recycling facility in Oak Ridge, Tennessee, as part of a planned $1.68 billion investment.

Why Fast Reactors and Recycling Fit Together

Fast-spectrum reactors can potentially use fuel compositions and recycled materials differently from conventional light-water reactors.

That creates the long-term possibility of converting material traditionally categorized as spent fuel into additional energy.

Commercial-scale implementation still requires substantial technical, regulatory and economic validation.

What Is the Standard Nuclear Partnership?

In June 2026, Oklo and Standard Nuclear signed an MOU to explore cooperation on:

• Nuclear fuel recycling;
• Advanced fuel manufacturing;
• Surplus plutonium utilization.

The companies described it as Oklo's first potential third-party offtake pathway for recycled materials.

Again, an MOU is an intention to explore cooperation—not guaranteed future revenue.

What Is the Surplus Plutonium Program?

DOE selected Oklo for advanced negotiations under a program exploring the use of designated U.S. surplus plutonium as advanced-reactor fuel.

The logic is:

Existing surplus material

↓

Convert under strict safeguards

↓

Advanced-reactor fuel

↓

Electricity generation

Oklo describes this as a potential bridge fuel while other domestic fuel infrastructure scales.

Does This Mean Oklo Already Owns U.S. Plutonium?

No.

Selection for advanced negotiations does not mean Oklo has unrestricted access to government nuclear materials.

Future use remains subject to:

• Definitive agreements;
• Security rules;
• Safeguards;
• material-accountability requirements;
• regulatory approvals.

Why Fuel Matters to the Meta Project

Meta's agreement specifically allows early funding to help Oklo secure fuel for the Ohio campus.

This highlights how critical fuel is to the overall economics.

The commercial chain is:

Meta demand

↓

Development funding

↓

Fuel + construction

↓

Aurora deployment

↓

Future electricity sales

Could Fuel Become a Separate Oklo Business?

Potentially.

Oklo's strategy increasingly spans:

• Power generation;
• Fuel fabrication;
• Fuel recycling;
• Nuclear materials.

If its infrastructure serves third parties as well as Oklo reactors, fuel could eventually produce independent revenue.

But investors should not assume future fuel projects are already profitable businesses.

Why Fuel Strategy Matters for OKLO Valuation

A company with customer demand but no fuel cannot deploy.

Fuel security can therefore increase the probability of future operating megawatts.

Conversely, long delays in HALEU or recycling facilities could delay revenue for the entire power business.

How Does Fuel Affect OKLOON?

OKLOON does not represent uranium or HALEU.

Fuel strategy affects Oklo's business.

That affects:

OKLO → OKLOON

For the distinction, read What Is OKLOON?.

FAQ

What fuel does Oklo need?

Oklo's advanced-reactor strategy includes HALEU and potentially recycled or other authorized nuclear materials.

Does Oklo have a Centrus deal?

The companies signed a Letter of Intent for HALEU supply, with anticipated deliveries beginning in 2029.

Is the contract final?

The current disclosed agreement anticipates a future definitive contract.

Is Oklo recycling nuclear fuel?

It is developing fuel-recycling technologies and infrastructure.

Is Oklo using plutonium?

It has been selected for advanced negotiations under a DOE surplus-plutonium program; future use remains conditional.

Is OKLOON a uranium or HALEU token?

No.

Risk Disclaimer

Advanced nuclear fuel involves regulatory, technical, security, supply-chain, cost and schedule risks. LOIs, MOUs and government selections should not be treated as guaranteed future commercial outcomes.