HALEU & Advanced Fuel Intelligence

The most underweighted constraint in advanced nuclear: Every enrichment expansion plan — Centrus, Orano, General Matter — requires uranium conversion feedstock that must pass through a single U.S. facility (Metropolis Works, Metropolis IL). That facility is sold out through 2028, has no domestic backup, and its replacement study hasn't finished feasibility analysis. The sector talks about enrichment. The actual first chokepoint is conversion.

Primary Entities

Company & Program Intelligence

Centrus Energy

LEU · Piketon, Ohio

Bullish (lagged)

The only US company currently enriching HALEU. Operating one 16-centrifuge cascade at the American Centrifuge Plant — a DOE-contracted demonstration, not a commercial enrichment facility. Delivered 900 kg of HALEU UF₆ (Phase II) by June 30, 2025. Phase III contract extended. January 2026: awarded $900M for expanded commercial-scale capacity at Piketon.

Current production rate~900 kg HALEU/yr (pilot)

Phase III contract value~$110M through Jun 2026

Commercial expansion award$900M (Jan 5, 2026)

Commercial scale start2029 earliest

Single Natrium annual need~17,000+ kg/yr (est.)

Gap: Current 900 kg/yr output is ~1/20th of what one Natrium reactor needs at full operation. The bridge between today's pilot and 2029 commercial scale is the critical unresolved question in advanced nuclear fuel supply.

Urenco USA

UUSA · Eunice, New Mexico

Strongly Bullish

The only operating commercial enrichment facility in the United States. Post-expansion capacity of ~5.1M SWU/year after two new cascades came online in 2025. NRC authorized production up to 10% U-235 enrichment in 2025. The backbone of the entire US reactor fleet — any disruption here would be a national security event. Sole-source risk is severe and underappreciated.

Current capacity~5.1M SWU/yr

Licensed site maximum~10M SWU/yr

New cascades2 started May + Sep 2025

Max enrichment authorizedUp to 10% U-235 (2025)

HALEU capabilityNot licensed for >10%

Concentration risk: The US has zero commercial enrichment redundancy. Urenco USA is privately held (European consortium). No US-owned enrichment at commercial scale until Centrus 2029 at earliest.

TerraPower

Private · Kemmerer, Wyoming

Bullish reactor / Unresolved fuel

Construction at Kemmerer officially began April 23, 2026 — the first utility-scale advanced reactor under construction in the US in decades. NRC issued its construction permit December 2025, 11% under budget. The fuel story is more complicated: the primary fuel supplier (ASP Isotopes) relies on laser enrichment technology in South Africa, pending permits not yet in hand.

Target commercial operation2031

Construction startApril 23, 2026

NRC construction permitIssued Dec 2025

ASP Isotopes agreementUp to 150 MT over 10 yrs

ASP production target2027 (South Africa — unpermitted)

Narrative vs. reality: ASP Isotopes has never produced HALEU commercially. Its facility is planned for South Africa, permits not received. For first core, TerraPower depends on DOE HEU downblend reserves — a finite government stockpile, not a commercial supply chain.

BWX Technologies

BWXT · Lynchburg, Virginia

Strongly Bullish

The only US company that has actually manufactured and delivered a complete TRISO fuel core — Project Pele microreactor core delivered December 2025. Operating from its licensed Specialty Fuels Fabrication Facility in Lynchburg. 20+ years of TRISO manufacturing experience. Launched BWXT Advanced Fuels LLC in August 2025, signaling a strategic commercial pivot. First-mover advantage over all competitors is operational, not theoretical.

FacilityLynchburg, VA (licensed, operating)

Project Pele core deliveredDecember 2025

BWXT Advanced Fuels LLCLaunched Aug 2025

Antares Nuclear contractOct 2025 fabrication start

Competing TRISO facilityTRISO-X Oak Ridge (licensed Feb 2026, production 2028)

Oklo

OKLO · Idaho National Lab

Speculative

Pre-construction, pre-NRC license. Fuel strategy relies on legacy EBR-II fuel from INL plus a planned Aurora Fuel Fabrication Facility (A3F) on-site at INL. DOE approved internal safety design agreements (NSDA) for both the reactor and A3F in 2025–2026, but these are DOE internal checkpoints — not NRC construction permits. Public coverage frequently conflates the two, overstating Oklo's regulatory progress.

DOE NSDA (reactor)Approved early 2026

DOE NSDA (A3F fuel facility)Approved Nov 2025

NRC construction permitNot yet issued

Fuel sourceEBR-II legacy + own fabrication

Atomic Alchemy NRC licenseIssued (isotopes — not reactor)

Key distinction: DOE approvals (NSDA, PDSA) are DOE's internal safety authorization process. They are not equivalent to NRC construction or operating licenses, which Oklo still needs before building or running a commercial reactor. These are fundamentally different authorizations.

Metropolis Works (Solstice Advanced Materials / ConverDyn)

NYSE: SOLS · Metropolis, Illinois · spun off from Honeywell Oct 2025

Strongly Bullish

The only operating uranium conversion facility in the United States. Note on corporate structure: Solstice Advanced Materials (NYSE: SOLS) owns and operates the physical plant — spun off from Honeywell in October 2025. ConverDyn (a Honeywell + General Atomics JV) is the commercial marketing entity that sells conversion services from the same facility. One plant, two corporate entities. Restarted July 2023 after six years idle. Now running above restart capacity and sold out through 2028. $2B+ order backlog. Metropolis is the only US facility — western conversion also includes Cameco Port Hope (Canada, ~11M kgU/yr) and Orano Comurhex (France, ~10.5M kgU/yr, targeting 13.5M by 2028). If Metropolis goes offline, US utilities reroute through Canadian or French conversion at added cost and logistics friction. Metropolis 2.0 feasibility study underway; EPC firm engaged April 2026.

2026 planned output>10,000 t UF₆ (~+20% YoY)

Order backlog>$2 billion

Capacity statusSold out through 2028

Domestic backupNone

Metropolis 2.0Feasibility study — not committed

Supply Chain

Fuel Cycle Bottleneck Assessment

Uranium Conversion

UO₃ → UF₆ · Metropolis Works IL

Capacity utilization98%+ sold out

⚠ Critical constraint. Single facility. Sold out through 2028. No US backup. Every enrichment expansion plan depends on this step.

HALEU Enrichment

15–20% U-235 · Centrus Piketon OH

vs. projected need~4% of 1 reactor

900 kg/yr today vs. ~17,000+ kg/yr per Natrium reactor. Commercial scale not until 2029. DOE HEU downblend bridges near-term gap.

LEU Enrichment (Commercial)

<5% U-235 · Urenco USA Eunice NM

Capacity utilization~72% est.

Post-expansion ~5.1M SWU/yr. Only western commercial source. PURA Russian ban adds structural demand. Zero US-owned redundancy until 2029.

TRISO Fuel Fabrication

BWXT Lynchburg VA + TRISO-X Oak Ridge TN

Capacity utilizationLow — capacity building

BWXT operational; TRISO-X licensed Feb 2026, production ~2028. First two-source capacity in US history for TRISO — positive development.

LWR Fuel Fabrication

Framatome Richland WA · Global Nuclear Fuel Wilmington NC · Westinghouse Columbia SC

Capacity utilizationAdequate

Multiple operating facilities. Not a near-term constraint for existing fleet. Framatome expanding for NuScale NuFUEL-HTP2 (2030 target).

Russian LEU Supply

TENEX/TVEL → PURA ban Jan 2028

Waiver window remaining~18 months

Hard stop Jan 1, 2028. Russia already imposing its own counter-export restrictions. Deliveries now discretionary Kremlin decisions, not contractual. Exposure is political, not just regulatory.

Timeline

Advanced Reactor & Fuel Infrastructure Deployment

2023

Centrus delivers first HALEU · Metropolis Works restarts

Centrus Phase I: 20 kg HALEU delivered to DOE. Metropolis Works restarts after 6-year idle — sole US conversion plant back online. URENCO USA at ~4.4M SWU/yr.

2024

PURA signed · Russian LEU ban begins (with waivers)

Public Law 118-62 signed Aug 2024. Waiver-based imports continue. 2024 cap: 476,536 kg LEU. Russia imposes its own counter-ban Nov 2024.

2025

900 kg HALEU delivered · Urenco expands · TRISO-X licensed · Part 53 finalized · TerraPower NRC permit

Centrus delivers 900 kg HALEU (Phase II) by June 2025. Urenco USA adds two cascades → 5.1M SWU/yr. NRC licenses TRISO-X facility (first new US fuel fab in 50+ years). NRC finalizes Part 53 framework Apr 2026. TerraPower gets NRC construction permit Dec 2025.

2026

DOE $2.7B enrichment awards · Kemmerer groundbreaking · Part 53 live

Jan 2026: DOE awards $900M each to Centrus, General Matter, and Orano. Apr 2026: TerraPower breaks ground at Kemmerer — first US utility-scale advanced reactor under construction in decades. DOE HALEU 21 MT target (Jun 2026) met primarily via HEU downblend, not new enrichment.

2027

Russian waiver expiry pressure · ASP Isotopes target (at risk) · TRISO-X first production

Russian LEU waiver window narrows sharply. ASP Isotopes targets first HALEU from South Africa (facility unpermitted as of 2026 — timeline at risk). TRISO-X first commercial fuel production targeted.

2028

⚠ Russian LEU hard ban · Jan 1 — no exceptions

All Russian enriched uranium imports prohibited, full stop. Any utility still exposed faces forced spot market buying. Structural demand surge for Urenco USA and any other western SWU. Metropolis 2.0 expansion feasibility results expected 2026 — construction (if approved) wouldn't help by 2028.

2029

Centrus commercial enrichment · Orano Project Ike target

Centrus $900M expansion targets first commercial-scale LEU + HALEU output. Orano Project Ike (Oak Ridge, NRC application submitted 2026) also targets this window for LEU. Neither HALEU supply pathway is de-risked — 2029 dates are earliest plausible, not guaranteed.

2031

TerraPower Natrium commercial operation target

Kemmerer target commercial operation date. Fuel requirement: multiple metric tons of HALEU/year. Supply chain for operational fuel load must be established well before this date. If construction stays on schedule, 2028–2029 becomes a critical fuel procurement window.

Regulatory

Key NRC & DOE Decisions — 2025–2026

Date	Decision	Entity	Why It Matters	Signal
Apr 29, 2026	Part 53 framework finalized	NRC · all advanced reactors	First technology-inclusive licensing pathway for non-LWR designs. Ends the era of adapting LWR rules to fast reactors, HTGRs, MSRs. Reduces regulatory uncertainty — the single biggest historical complaint.	Bullish
Feb 13, 2026	TRISO-X SNM license issued	TRISO-X LLC · Oak Ridge TN	First new US fuel fabrication facility licensed in over 50 years. Category II SNM license (SNM-7007). Physical production ~2028 — but the license is real and issued.	Bullish
Dec 2025	TerraPower construction permit	NRC · TerraPower Kemmerer WY	Safety review completed 11% under budget and ahead of schedule. Enables April 2026 groundbreaking. Sets precedent for advanced reactor licensing timeline.	Bullish
2025	Urenco USA 10% enrichment authorized	NRC · Urenco Eunice NM	Expands Urenco USA's product range for research reactors and some advanced designs without requiring a new HALEU licensing tier. Incremental but real capacity expansion.	Bullish
May 2025	Xe-100 at Dow NRC CP application accepted	NRC · X-energy / Dow Seadrift TX	First industrial-application advanced reactor construction permit application. If approved, first commercial deployment of an HTGR in the US and a major validation of the advanced reactor commercial case.	Bullish
Jan 2026	DOE $2.7B enrichment awards	DOE · Centrus / Orano / General Matter	$900M each to three enrichers for domestic LEU + HALEU capacity. Largest single enrichment investment in US history. Commercial output 2029–2031. Bridge gap filled by HEU downblend.	Mixed (long lag)

Analysis

Investor Signal Summary by Sector

Sector	Signal	Key Thesis	Primary Risk
Uranium miners	Bullish	PURA 2028 hard ban forces supply chain transition. Advanced reactor pipeline adds structural demand. HALEU requires more uranium per unit of fuel than LEU.	Russian material flowing via waivers through 2027 delays urgency. Conversion/enrichment bottlenecks could strand mined uranium.
Enrichers (western)	Strongly Bullish	Urenco USA sole-source for 3+ more years. Russian ban forces utility portfolio transition. $2.7B DOE investment in new US domestic capacity is structural.	Centrus commercial capacity not until 2029. If Russian waivers extend beyond 2027, near-term SWU pricing pressure continues.
SMR / advanced reactor developers	Mixed	TerraPower genuinely under construction. Part 53 reduces regulatory risk for all developers. NRC pace materially faster than 2020–2023.	HALEU supply for first cores is not de-risked from commercial sources. Fuel availability could gate reactor deployment timelines regardless of construction progress.
TRISO fuel producers	Bullish	BWXT is the only proven TRISO manufacturer. TRISO-X now licensed — first new US fuel facility in 50+ years. First-mover advantage is operational reality, not projection.	Customer base depends on Xe-100, Pele, and microreactor programs actually proceeding. TRISO demand is real only if the reactors get built.
Conversion (Metropolis)	Strongly Bullish	Sold out through 2028. $2B+ backlog. No US backup. Every enrichment expansion requires conversion feedstock through this facility. Structural underweighting by institutional investors.	Single-facility concentration risk cuts both ways — bullish for pricing, bearish for national supply security. Metropolis 2.0 is study-phase only.
Utilities (nuclear)	Mixed/Watch	Fleet at 91.9% CF. SLR extending reactor lives. Part 53 enables new capacity addition. Low fuel cost per MWh even at $85/lb spot.	Any utility still holding TENEX contracts faces political-risk disruption before Jan 2028 hard ban. Fuel cost increases as delivered contracts roll off to spot.

Intelligence Desk

The Single Most Important Fact — Per Topic

Centrus / HALEU production: Current 900 kg/yr output is approximately 1/20th of what a single Natrium reactor needs at full operation. The US has no plan to bridge this gap from commercial enrichment before 2029.

DOE HALEU program: The DOE's 21 MT HALEU target by June 2026 is being fulfilled primarily through government HEU downblending — a finite stockpile — not new commercial enrichment capacity.

Western enrichment: The US has zero commercial enrichment redundancy. Urenco USA — European-owned — is the entire US fleet's enrichment supply. Any disruption is a national security event with no domestic backup.

TerraPower / Kemmerer: The reactor is genuinely under construction. Its primary fuel supplier (ASP Isotopes) has never produced HALEU commercially and is building its facility in South Africa, permits not yet in hand.

Oklo: DOE's NSDA and PDSA approvals are DOE internal safety checkpoints. They are not NRC licenses. Oklo still needs NRC construction and operating permits before it can build or run a commercial reactor.

Russian ban (PURA): January 1, 2028 is a hard stop — no waivers possible beyond that date. Russian LEU deliveries in 2025–2026 are now discretionary Kremlin decisions, not contractual obligations.

BWXT TRISO: BWXT is the only US entity that has actually manufactured and delivered a complete TRISO fuel core. 20 years of operational track record vs. all competitors' zero.

Conversion / Metropolis: The US has one uranium conversion plant. It is sold out through 2028. Its replacement study isn't finished. This is the first physical chokepoint in the entire US nuclear fuel cycle and the most underweighted constraint in sector analysis.

Part 53 framework: Finalized April 29, 2026 — the first technology-inclusive licensing pathway for non-LWR advanced reactors in US history. The missing regulatory piece for the entire advanced nuclear sector is now in place.

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