Oklo Advances Part 52 Licensing Strategy to Speed Non-Light-Water Reactors

Oklo Inc. has advanced a regulatory strategy built around a Part 52 combined license for its fast fission plants, submitting what the company says is the first custom combined construction-and-operation application for an advanced reactor and positioning that filing as a reusable precedent for future non-light-water projects. The move dovetails with a Department of Energy selection announced in Oklo’s 10/01/2025 press release naming the company, along with three other firms, to the Advanced Nuclear Fuel Line Pilot Projects and committing Oklo to build and operate three fuel-fabrication facilities.

Title 10 of the Code of Federal Regulations Part 52 is central to Oklo’s plan because the single application covers both construction and operating approvals, aligning with the company’s model of designing, building, and operating its own plants. The company and market reporting describe the filing as a regulatory benchmark intended to let Oklo reuse major regulatory documents, including safety and design reports, to narrow the scope of future reviews and shorten review cycles for subsequent sites.

On-site work at Idaho National Laboratory supports the approach. Progress at the Aurora–INL location shows readiness activities completed and the license application currently under review, Nasdaq reporting states, while Oklo’s 10/01/2025 release says the company “was the first to receive a site use permit from the U.S. Department of Energy for a commercial advanced fission plant” and that it “was awarded fuel from Idaho National Laboratory.”

Oklo’s reactors are fast fission designs with company claims of passive safety features that may simplify regulatory review. The 10/01/2025 release also highlights Oklo’s work on advanced fuel recycling in collaboration with DOE and national laboratories and the company’s intention to establish a domestic supply chain for critical radioisotopes. Oklo’s subsidiary Atomic Alchemy was selected in August 2025 for three of DOE’s 11 projects under the Reactor Pilot Program and is described in the release as “an innovator in radioisotope production.”

DOE’s Fuel Line Pilot Projects are framed in Oklo’s release as “designed to accelerate the permitting, construction, and operation, drive private sector investment, and create a fast-track approach to licensing.” The program selection and the three planned fuel-fabrication facilities make the company a focal point for linking licensing strategy to on-the-ground fuel supply capabilities.

The regulatory backdrop is changing. Nhjournal notes May 2025 executive orders directing the Nuclear Regulatory Commission to accelerate advanced reactor reviews and calls for earlier environmental reviews and predictable timelines. Nhjournal quotes Judi Greenwald, CEO of the Nuclear Innovation Alliance: “Both the industry and the NRC are learning by doing, and we are seeing some [licensing successes],” and attributes to Barnard the line: “Modernizing nuclear licensing doesn’t mean lowering safety standards. It means applying them intelligently, using risk-informed science and modern tools instead of paperwork for paperwork’s sake.” Industry reporting also recalls that Oklo’s initial federal license application was denied three years earlier, prompting the second attempt now under way.

Market signals reflect investor appetite and remaining risks. Finance Yahoo’s Zacks rundown notes “Shares of Oklo Inc. have surged nearly 250% so far this year” and lists intraday moves such as OKLO +2.77% and SMR +2.29%. NucNet reported the company recently announced a financial loss and said it is seeing growing data-center demand.

Key documents remain to be seen: the NRC docket number and filing date for the custom Part 52 application, the denial paperwork from the earlier NRC decision, DOE award letters and contract terms for the Fuel Line Pilot Projects, and Oklo’s SEC filings showing the financial loss cited by NucNet. The outcome of the NRC’s review and the details of DOE’s project awards will determine whether Oklo’s combined license approach establishes the reusable precedent the company is betting on.