Sable Fast Reactor, Series B

Preferred equity in a sodium fast reactor with integrated salt storage, siting where a coal plant already has the transmission.

A fast spectrum needs no moderator, and sodium at atmospheric pressure removes the high-pressure containment problem. Bolting a molten salt heat store onto the secondary side turns a baseload machine into one that can follow load and sell into peak pricing. Siting at a retiring coal plant inherits the switchyard, the transmission rights and the workforce.

Hams Fork Energy Center · Kemmerer, WYConstruction permit filedEscrow: Cadence Escrow Services

TRL 6 of 9, band 5.3 to 6.4, signed by Dr. Samuel Adeyemi, PhD Nuclear Engineering; ASME Section III reviewer, on Apr 18, 2026.See the evidence it rests on

$4,410,000 committed of $5,000,000

$2,205,000 released · 88% subscribed

Released to the issuerCommitted, held in escrowRemaining

Minimum: $100
Instrument: Preferred equity
Term: None
Investors: 2,218

Closes September 15, 2026 · 2 days remaining

Eligibility depends on residency, accreditation status and how much you have already invested this year.
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TRL assessment

Technology readiness level, 1 to 9

Confidence band 5.3 – 6.4

A prototype sodium loop with representative components has operated at temperature under third-party witness, which is what level 6 describes. Sodium fast reactors have operating precedent going back decades, so the physics is not the question; the fuel supply and the license are. On the commercial side there is a letter of intent rather than a contract, and a HALEU supply chain that is itself under construction.

At TRL 6, the ladder permits Preferred equity and releases up to 50% of committed capital. This offering is structured as a preferred equity, which is consistent with that band.

Signed and published

Reviewer: Dr. Samuel Adeyemi
Credential: PhD Nuclear Engineering; ASME Section III reviewer
Signed: April 18, 2026
Published: April 19, 2026
Methodology: v1.4
Model: ci-trl-2026.06
Generated: Apr 13, 2026

How scoring works

Evidence

Every score cites the documents it was derived from, with the weight each carried. An assessment without evidence is an opinion.

Source	Document	Date	Weight
Independent test report	Integrated sodium loop, witnessed 1,500-hour campaign Independent witness test report, prototypic components Pump, intermediate heat exchanger and purification system performed to specification.	Feb 27, 2026	35%
National lab result	Metallic fuel irradiation data, legacy and current campaigns National laboratory archive plus current campaign interim results Historical metallic fuel performance supports the design burnup target.	Nov 20, 2025	28%
NRC docket	Pre-application topical reports accepted NRC pre-application engagement, three topical reports Application not yet docketed. Topical review in progress.	Mar 30, 2026	22%
DOE award	Advanced reactor demonstration cost-share award DOE award with milestone structure Federal cost share is milestone-gated and does not guarantee later tranches.	Sep 5, 2024	15%

Score history

A score changes on the day a reviewer signs a new assessment, which is why this is a step line rather than a curve.