Oklo Signs Definitive Centrus HALEU Deals for Up to 5 Aurora Units

Oklo said on Nov. 12 it signed multiple definitive multi-year contracts with Centrus Energy for HALEU fuel, enough for up to five Aurora powerhouses, with deliveries from 2029.

HALEU, high-assay low-enriched uranium, is enriched above 5% and below 20% U-235. Under the contracts, Oklo will make prepayments for future deliveries, which Centrus will use to build new U.S. enrichment capacity, according to the joint release distributed by Business Wire and posted on Centrus's site. The fuel comes from Centrus's American Centrifuge Plant in Pike County, Ohio. Neither company gave a contract value, a HALEU quantity or the size of the prepayments, which the release calls "meaningful."

Most of the outline was already visible. As Voltgrid reported on Nov. 8, Oklo's 10-Q described a Centrus supply agreement signed Sept. 30 and an undisclosed Meta payment released from escrow on Nov. 2 as credit toward fuel orders, while Centrus's 10-Q said its June letter of intent had been definitized. What the Nov. 12 release adds is the first public description of the contracts themselves: several of them, definitive, formalizing the June letter of intent. It gives no signing date, so it does not say whether they are the Sept. 30 agreement or later paper.

The consequence is fuel for a 1.2 GW campus that exists only as a plan. The release says the HALEU secures fuel for the first phase of the Ohio campus, and that Meta's prepayment for future Oklo power production supports the purchase. The Scioto Valley Guardian, a regional paper covering Piketon, reported the same chain: Meta prepaid Oklo for electricity, and Oklo is using that money to prepay Centrus. The release gives no output per powerhouse, so the share of the 1.2 GW that five powerhouses cover cannot be worked out from it.

Fuel beyond Ohio, including the Idaho reactor

The release says the contracts also cover future Aurora projects and "later refueling" of Aurora-INL, Oklo's first powerhouse at Idaho National Laboratory. That unit's first fuel is Oklo's allocation of recovered Experimental Breeder Reactor II (EBR-II) fuel, so the Centrus HALEU is for later refueling, not the first fuel. Oklo chief executive Jacob DeWitte said in the release that securing fuel is essential to scaling beyond the first reactor in Idaho.

For Centrus, chief executive Amir Vexler said Oklo's prepayments add to ones it has already received and will help fund the build-out. The release repeats that Centrus has secured $5.4 billion in customer contracts and commitments for the new capacity, the same figure it reported for Sept. 30 on Nov. 4, as Voltgrid covered. It does not say how much of that is Oklo's. The release adds that Centrus has completed and begun shipping its first new centrifuge, which we reported on Oct. 30.

What is not confirmed yet

No price, volume or prepayment amount is public, and the release does not say what conditions remain on the contracts. Oklo targets the first Ohio phase as early as 2030 and the full 1.2 GW by 2034, and as we reported on Oct. 31, no licence application for Ohio is on file with the NRC.

The fuel also depends on Piketon staying available. Centrus's lease with the Department of Energy expires on Oct. 1, 2027, and DOE has said it will work toward a long-term extension before Dec. 31, 2026 without an obligation to grant one, as we covered on Nov. 5. First deliveries are a 2029 target, not delivered fuel.