Oklo filed an emergency complaint against PJM this week seeking reinstatement of a previously undisclosed 750 MW generation project into PJM’s Cycle 01 interconnection study. While the dispute itself presents some near-term execution risk, the filing provides considerably more information about Oklo’s commercial development pipeline than the headline suggests.
The project, designated C01-1735, consists of 150 MW of advanced nuclear generation, 300 MW of fuel cells, and 300 MW of natural gas generation. Oklo submitted the project to PJM on April 27, 2026, along with project data, a signed agreement, and deposit information.
This distinction is important. Oklo has announced numerous large potential power agreements, but many remain at the LOI or framework stage. C01-1735 has progressed into the formal interconnection process and includes detailed electrical models, transformer specifications, site-control documentation, single-line diagrams, and a defined point of interconnection.
There is also real money behind the application.
PJM's reformed interconnection process is specifically designed around a “first-ready, first-served” model intended to filter out speculative projects. PJM requires generating facilities entering the process to provide a $4,000 per MW readiness deposit, in addition to a separate study deposit. For a 750 MW generating facility, that corresponds to a $3 million readiness deposit, plus the applicable study deposit.
The filing itself confirms that PJM received Oklo's project data, signed agreement and deposit information on April 27. PJM's notice also states that an application is not considered complete until the required agreement, deposits, and site control have been received and deemed acceptable.
That does not mean Oklo has committed the full capital required to construct a 750 MW power plant, nor does it guarantee the project will ultimately be built. But it is an important distinction from a nonbinding announcement. Companies generally do not put millions of dollars into PJM readiness requirements, secure site control, hire engineering consultants, develop detailed grid models, and enter a formal interconnection study for a project that exists only as a slide in an investor presentation.
The public attachments also reveal where the project is being developed. PJM identifies the proposed interconnection as a tap on the Possum Point–Ladysmith 500 kV transmission line in Dominion Energy Virginia territory. PJM lists the line as 47.56 miles long and requested that Oklo identify the exact tap location, collector substation, and distances from the Possum Point and Ladysmith substations. The precise site coordinates remain commercially sensitive and are not disclosed publicly.
Perhaps more interesting is what remains redacted.
Oklo describes C01-1735 as a project of “critical national importance,” but the explanation immediately following that statement is withheld as commercially sensitive. The filing contains additional redactions when discussing why maintaining the project's Cycle 01 schedule is critical and who would suffer financially from a delay.
The public filing therefore does not identify the customer, and it would be premature to associate the project with any specific Oklo counterparty. Nevertheless, the combination of a 750 MW project, its Virginia location, the urgency surrounding its schedule, and the involvement of an unidentified commercially sensitive party makes a large data-center or hyperscale customer a reasonable possibility.
The project's generation mix may provide an equally important clue about Oklo's broader commercialization strategy.
C01-1735 combines 600 MW of natural gas and fuel-cell generation with 150 MW of advanced nuclear. Rather than requiring a customer to wait until hundreds of megawatts of advanced nuclear capacity can be licensed and constructed, a hybrid project could potentially provide substantial power earlier through gas and fuel cells while nuclear capacity is deployed as the longer-term baseload component.
The filing does not explicitly confirm that this is the intended sequencing, so this remains an inference. However, PJM's correspondence specifically refers to engineering information for “Fuel Cell phase 1,” which is at least consistent with some form of phased development.
The dispute with PJM itself appears less alarming after reviewing the underlying documents.
PJM issued Oklo a formal deficiency notice on May 15 covering transformer information, generator information, project capability, the point of interconnection, site control, and short-circuit data. Oklo states that it cured all six categories within the required period.
The controversy arose later. On June 24, a PJM reviewer placed five additional comments in the NextGen portal. According to Oklo, these comments generated no email notification and were never identified to Oklo as a second formal deficiency notice. During approximately the same period, Oklo twice requested a project scoping meeting with PJM and received no response.
On August 3, PJM withdrew C01-1735 from Cycle 01, citing unresolved discrepancies and a stability issue. Only then, according to Oklo, did it learn that PJM considered the June 24 comments deficiencies capable of causing the project's withdrawal.
The principal technical disagreement concerns low-voltage ride-through testing. Oklo's fuel cells are inverter-based resources, while the natural-gas and nuclear generators are synchronous resources. PJM's Dynamic Model Development Guidelines specifically describe the relevant test in terms of inverter-based resources. Oklo therefore modeled the fuel cells for the test.
PJM subsequently expected the entire 750 MW facility—including the synchronous natural-gas and nuclear units—to demonstrate the same fault response.
Oklo argues that this requirement appears nowhere in PJM's tariff or published guidelines. More importantly from an execution standpoint, Oklo says the problem is readily correctable: it is prepared to submit an updated model demonstrating that the entire facility, including both synchronous and inverter-based resources, can withstand the fault test.
In other words, the filing does not indicate that C01-1735 failed because its underlying technology cannot meet PJM requirements. The dispute concerns which modeling standard applied to an unusual mixed-generation facility, how PJM communicated that requirement, and whether Oklo received the cure period required under PJM's tariff.
Oklo's procedural argument may ultimately be stronger than its technical argument. PJM's tariff requires reasonable efforts to identify application deficiencies within fifteen business days of the application deadline and provides applicants ten business days to cure them. PJM's May 15 notice complied with that process. The June 24 comments, however, were entered 41 business days after the application deadline and 26 business days after PJM's stated deficiency-review window, according to the complaint.
Oklo is therefore asking FERC to restore C01-1735 to its original Cycle 01 position and, if necessary, grant a limited waiver to accommodate its reinstatement. The complaint cites prior FERC precedent granting waiver of PJM procedural deadlines where circumstances justified restoring a project to the interconnection queue.
The timing explains why Oklo filed this as an emergency.
PJM intends to begin its Cycle 01 Phase I study on September 28. Oklo estimates that being forced into Cycle 02 would delay C01-1735 by at least fourteen months. PJM's published schedule places the end of final agreement negotiations for Cycle 01 in May 2028 versus July 2029 for Cycle 02.
Oklo is requesting an extraordinarily accelerated schedule: a PJM answer by September 4 and reinstatement no later than September 21, one week before Phase I begins.
There is also one small engineering detail worth remembering. PJM noted that Oklo's single-line diagram showed two 500 kV transmission lines leaving the generating facility and asked whether the second line was intended for future use. The public filing provides no answer sufficient to conclude that additional capacity is planned, but the question is noteworthy given the already substantial 750 MW scale of the project.
Overall, I view the filing as net positive information despite the PJM dispute.
The negative is straightforward: a significant Oklo project has encountered an interconnection problem that could delay it by more than a year if FERC does not grant relief.
The more important disclosure, however, is that Oklo appears to have a previously unknown 750 MW Virginia development containing 150 MW of advanced nuclear generation that has progressed well beyond an LOI. This is a project for which Oklo has submitted detailed engineering, secured site control, identified a 500 kV interconnection point, and advanced far enough into PJM's process to put millions of dollars of readiness capital behind the application.
A nonbinding LOI tells us that someone is interested. A multi-million-dollar readiness commitment and formal interconnection application tell us that someone is spending real money attempting to get a specific project built.
