Podcast Episode Summary

Catalyst with Shayle Kann

Episode: Building a Domestic Nuclear Fuel Supply Chain
Guest: Scott Nolan, CEO of General Matter
Released: April 2, 2026
Host: Shayle Kann
Producer: Latitude Media

Episode Overview

This episode focuses on the critical but often overlooked front-end of the nuclear fuel supply chain in the United States. With an eye toward the anticipated "nuclear renaissance," Shayle Kann and Scott Nolan discuss the steps required to produce reactor-ready nuclear fuel, the geopolitical dependencies (particularly on Russia), the unique bottleneck at the enrichment stage, and efforts to build a secure, domestic supply chain—especially for the advanced fuels needed for next-generation reactors.

Key Discussion Points & Insights

1. The Nuclear Fuel Supply Chain: "Soup to Nuts"

[02:39–03:37]

• Five Steps, One Bottleneck:
  1. Uranium mining
  2. Conversion to a gas (UF6)
  3. Enrichment (raises concentration of U235)
  4. Deconversion to a solid
  5. Fuel fabrication
• The US covers all steps domestically except commercial-scale enrichment, a key bottleneck.
  • Quote:

    "The US does all of the steps. The US does not do the middle step at commercial scale. So that's where the bottleneck is." — Scott Nolan [02:51]

2. Geography and Bottlenecks in Conversion & Enrichment

[03:37–07:11]

• Mining Sources: Mostly Kazakhstan and Canada, with some from the US and Australia.
• Conversion: Only one US facility (Honeywell's Solstice Materials in Metropolis, IL), operating for over 50 years. Expanding but limited.
  • Quote:

    "There has been one conversion plant owned by Honeywell... operating in the US as you said in Illinois for what, like 50 years... literally only one." — Shayle Kann [04:42]

• Conversion Capacity Not Critical—Yet:
  • There's still spare capacity and inventory, but if enrichment doubles in the US, conversion could become a bottleneck. NEI surveys show utilities see this as the next big challenge.

3. Enrichment: The Critical Bottleneck

[08:22–13:11]

• The Enrichment Process:
  • Utilities buy uranium, then "toll" it through enrichment (i.e., they upgrade rather than buy finished fuel).
  • Enrichment increases the percentage of fissile isotope U235. Standard nuclear fuel (LEU) needs about 3–5% U235; advanced reactors need more (up to 19.75%, just under weapons grade).
• Current Enrichment Dependency:
  • ~75% from Europe, ~25% from Russia. Only one US-based facility (operated by European company Urenco) covers about 20% of US demand, the rest is imported.
  • There is no US-owned commercial-scale enrichment currently.
• Russian Dependence & History:
  • US enrichment declined from 86% global market share (1980s) to less than 0.1% today.
    • Result of treaties (e.g., "Megatons to Megawatts"), US tech lagging (continued using outdated gaseous diffusion), and subsequent shutdown of US operations.
  • Russian import waiver process in place until 2028 under a congressional ban. A looming supply gap is coming with the end of waivers.

"We went from 86% global market share to less than 0.1% today by US companies or US entities." — Scott Nolan [15:17]

4. Advanced vs. Incumbent Fuels: LEU and HALEU

[18:49–23:45]

• LEU (Low Enriched Uranium): Used in current reactors (3–5% U235).
• HALEU (High Assay LEU): Needed for advanced Gen IV reactors (up to 19.75% U235); currently, only Russia produces HALEU at scale.
  • This fuel bottleneck stalls next-generation nuclear.
  • US DOE is seeding capacity but only covers initial demonstrations.
  • General Matter (& Centrus) aiming to build commercial-scale domestic HALEU production by the end of this decade.

"The only place we can get it is actually Russia and we have to import it." — Scott Nolan [21:22]

• Process Differences: Technically, enrichment is the same physics (distillation/separation), but safety/criticality and licensing rules require some differences in equipment and process scale, especially for HALEU.

5. General Matter’s Plans & US Government Support

[26:46–31:09]

• Business Model:
  • For LEU: Pure tolling (service fee); utility owns uranium
  • For HALEU: Likely a mix, as reactor companies may not have fuel teams—General Matter might supply enriched product directly.
• Paducah, Kentucky:
  • Site of the former US commercial-scale enrichment facility (shut in 2013)
  • General Matter building on 100 acres at Paducah DOE site, supported by strong local expertise and community buy-in.
  • DOE awarded funds specifically for HALEU enrichment capacity.
  • Targeting enough capacity to serve US HALEU demand through mid-2030s to 2040.
• Market Dynamics: LEU demand is stable and predictable; HALEU demand is uncertain, driven by advanced reactor deployment.

6. The Path to a Fully Domestic Supply Chain

[34:42–37:54]

• Other Bottlenecks:
  • Conversion: Needs to expand as enrichment grows.
  • Mining & Permitting: US resources are smaller and more fragmented, permitting is slow, and regulations lag behind newer, cleaner in-situ mining methods.
• A Full Domestic Chain Needed:
  • Mining → Conversion → Enrichment → Deconversion/Fabrication → Reactor
  • Ensures energy security, removes adversarial dependencies.

"If I had to wave a magic wand, I would say let's make it easier for US miners to compete with miners in other countries just so we can strengthen that domestic supply chain." — Scott Nolan [37:54]

Notable Quotes & Memorable Moments

• "[The] US does all of the steps. The US does not do the middle step at commercial scale. So that's where the bottleneck is." — Scott Nolan [02:51]
• "There has been one conversion plant owned by Honeywell... operating in the US as you said in Illinois for what, like 50 years... literally only one." — Shayle Kann [04:42]
• "We went from a place of 86% global market share to down to less than 0.1% today by US companies..." — Scott Nolan [15:17]
• "The only place we can get [HALEU] is actually Russia and we have to import it... there really is no US-owned production." — Scott Nolan [21:22]
• "As a producer, why should producers produce capacity for something that hasn't even been deployed... we're willing to lean into that and produce a lot of capacity." — Scott Nolan [27:32]
• "If I had to wave a magic wand, I would say let's make it easier for US miners to compete..." — Scott Nolan [37:54]

Timestamps for Key Segments

| Timestamp | Topic | |-------------|---------------------------------------------------------------| | 02:39–03:37 | Nuclear fuel supply chain breakdown (five steps) | | 04:42–05:19 | US conversion bottleneck | | 08:22–11:31 | Enrichment process, tolling model, U235 concentrations | | 12:24–13:46 | US reliance on overseas enrichment (Europe, Russia) | | 13:46–16:35 | Russian import ban, history of US decline in enrichment | | 18:49–21:22 | LEU vs. HALEU, advanced reactor needs, current bottlenecks | | 26:46–29:30 | Market uncertainty and General Matter's bullish strategy | | 29:30–31:09 | Paducah facility, DOE award, plans for scale | | 34:42–37:54 | Bottlenecks beyond enrichment: mining, conversion, permitting |

Conclusion

This episode offers a comprehensive look at the hidden complexities of the nuclear fuel supply chain, emphasizing the urgent need for the US to establish domestic enrichment and advanced fuel capabilities to secure its position in the next wave of nuclear energy. Scott Nolan and General Matter are taking on both a stable but geo-politically fraught market (LEU) and a strategically vital, but still-nascent advanced fuels segment—ultimately positioned to be a linchpin in US energy security and the broader energy transition.