# HALEU TRISO fuel production by Standard Nuclear Canonical page: https://technooptimist.io/energy/haleu-triso-fuel-production Frontier: [Energy](https://technooptimist.io/energy.md) · Field: Nuclear fuel · Company: [Standard Nuclear](https://technooptimist.io/companies/standard-nuclear.md) Stage: Pilot (3 of 5: Research → Proto → Pilot → Deploy → Scaling) Updated: last update 2026-07-16, facts checked 2026-10-11 Goal: Make enough TRISO fuel for the first wave of US microreactors and small reactors. Fuel, not reactor design, is a main bottleneck for these reactors, and few US lines can make TRISO. Status: Making HALEU TRISO fuel at Oak Ridge (~500 kg/yr); expanding past 2 t/yr; Idaho site built. Next milestone: Oak Ridge capacity above 2 tonnes a year ## Milestones | Status | Milestone | Date | Slip | | --- | --- | --- | --- | | Done | Buys Ultra Safe Nuclear's fuel assets out of bankruptcy | Q4 2024 | | | Done | Emerges from stealth with $42M | Jun 2025 | | | Done | First company picked for DOE's Fuel Line Pilot Program | Aug 2025 | | | Done | Construction starts on the Idaho Falls assembly site | Oct 2025 | | | Done | DOE safety-oversight agreement signed | Dec 2025 | | | Done | First HALEU arrives; HALEU TRISO production begins | Jan 2026 | | | Done | Lists on the NYSE, raising $150M | 16 Jul 2026 | | | Current | Oak Ridge capacity above 2 tonnes a year | | | ## Most important updates - **16 Jul 2026**: Standard Nuclear lists on the NYSE as STDN after a downsized $150 million IPO. Standard Nuclear sold 10 million shares at $15, raising $150 million, and began trading on the NYSE under STDN on 16 July 2026. ([our story](https://technooptimist.io/stories/standard-nuclear-lists-on-the-nyse-as-stdn-after-a-downsized-150-741354bc.md) · [original source](https://www.orrick.com/en/News/2026/07/Standard-Nuclear-Announces-IPO)) - **16 Jun 2026**: Oklo and Standard Nuclear sign an MOU to turn recycled reactor material into TRISO fuel. Oklo and Standard Nuclear signed a non-binding memorandum to explore feeding uranium and transuranic material recovered at Oklo's planned recycling plant in Oak Ridge into Standard Nuclear's TRISO production. ([our story](https://technooptimist.io/stories/oklo-and-standard-nuclear-sign-an-mou-to-turn-recycled-reactor-material-d8ea786f.md) · [original source](https://www.businesswire.com/news/home/20260616604000/en/)) - **26 Jan 2026**: Standard Nuclear starts producing HALEU TRISO fuel and raises a $140 million Series A. Standard Nuclear began making HALEU TRISO fuel at its Oak Ridge plant after receiving its first HALEU from DOE's Savannah River Site, for Radiant's Kaleidos microreactor under DOE's Reactor Pilot Program. ([our story](https://technooptimist.io/stories/standard-nuclear-starts-producing-haleu-triso-fuel-and-raises-a-140-50666678.md) · [original source](https://www.businesswire.com/news/home/20260126420607/en/Standard-Nuclear-Begins-Production-of-Advanced-HALEU-Fuel-and-Raises-140-Million-in-Series-A-Funding)) ## Current obstacles - **Scaling from kilograms to tonnes**: Going from ~500 kg to over 2 t a year means more coaters, more HALEU and stricter security for richer uranium. - **HALEU feedstock**: Production depends on scarce HALEU, so far from DOE's Savannah River Site; commercial US HALEU enrichment is years away. ## Physics limits - **Slow, careful manufacturing**: Each particle needs several coatings deposited in sequence and checked for defects; a few failed coatings let fission products escape, so quality control sets the pace. - **Less uranium per litre**: Most of a TRISO fuel element is coating and graphite, so cores need richer HALEU to pack enough fissile material into a small reactor. ## How it works ### Kernel: A grain of uranium Each particle starts as a uranium kernel smaller than a poppy seed, here made with HALEU so small cores can run for years. ### Coatings: Ceramic shells around each grain Layers of porous carbon, dense carbon and silicon carbide wrap the kernel; each layer works as a tiny containment vessel. ### Forms: Compacts and pebbles Thousands of coated particles are pressed into graphite pellets or balls, the form a given reactor design loads. ### Oversight: DOE, not NRC, for now The Oak Ridge line runs under DOE safety authority via a December 2025 agreement, serving DOE's reactor pilot projects. ## Spec sheet | Spec | HALEU TRISO fuel production | Provenance | | --- | --- | --- | | Current line capacity | About 500 kg TRISO fuel/year | reported | | Expansion target | Over 2 tonnes/year | reported | | Oak Ridge facility | 19,000 sq ft on a 36.8-acre campus | reported | | Contract backlog | Up to $245 million | reported | | Revenue (12 months to Mar 2026) | $3 million | reported | Provenance: reported = stated by the company; estimated = our estimate; sample = a sample figure. ## About Standard Nuclear Oak Ridge, Tennessee maker of TRISO fuel for small and micro reactors, built on Ultra Safe Nuclear's fuel line bought out of bankruptcy in 2024. It began making HALEU TRISO fuel in January 2026 and listed on the NYSE in July 2026. - Describes itself as the only independent US maker of TRISO fuel; reactor-agnostic, also radioisotope power for space and defense. - Making HALEU TRISO fuel since Jan 2026 for Radiant's Kaleidos microreactor; ~500 kg/yr line, expanding past 2 t/yr. - Raised $140M Series A (Jan 2026) and $150M in a July 2026 NYSE IPO; backlog up to $245M. - Founded: 2024 - Headquarters: US - Status: public - Listing: STDN (NYSE) - Raised: $182M - Last round: IPO (NYSE: STDN) $150M, 16 Jul 2026, led by BofA Securities, Goldman Sachs - People: Kurt Terrani (Chief Executive Officer) - Partners, customers, investors: Radiant (customer); Oklo (partner); Framatome (partner); Ultra Safe Nuclear (supplier); Decisive Point (investor) Company page: https://technooptimist.io/companies/standard-nuclear.md ## Related programs Everything in Energy: https://technooptimist.io/energy.md --- The Techno Optimist tracks every frontier of technology, program by program: https://technooptimist.io/ (a Markdown version of any page: add .md to its URL; site map for agents: https://technooptimist.io/llms.txt). 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