In brief
The US once dominated uranium enrichment but let it lapse after the Cold War, and now depends on Russia and Europe for reactor fuel. Scott Nolan argues that this fuel gap, not reactor design or licensing, is the key bottleneck for new nuclear power. His company, General Matter, is building a fresh enrichment plant in Paducah, Kentucky, to supply HALEU and ordinary reactor fuel by 2030.
The tension is between a hard deadline and a hard business. A US ban on Russian uranium imports begins on January 1, 2028, while General Matter will not deliver fuel until about the end of the decade. Nolan says the real challenge is not the physics, which is old and well understood, but making enrichment cheap enough to compete globally, using a clean-sheet design and SpaceX-style speed.
Facts
Stated by the speakers. Each quote matches the transcript, which shows what was said, not that it is true.
The US Congress passed a ban on imports of Russian uranium in mid-2024, taking effect on January 1, 2028, with imports continuing under a waiver until then.
“Congress passed a ban on imports of Russian uranium. That ban goes into effect January 1, 2028. Right now, they're still importing under a waiver.”
0:04:52 · Scott Nolan · Russian uranium ban · 2024
The US gets about a quarter of its enriched uranium from Russia, with imports set to continue until 2028.
“So in the U .S., we get about a quarter from Russia, still imported. That's going to keep going until 2028.”
0:03:25 · Scott Nolan · Uranium imports · 2028
Most reactors on the US grid use uranium enriched to 3% to 5%, while advanced reactors use fuel enriched to just under 20%.
“Most of the reactors in the grid today, they go at 3 % to 5%.”
0:02:08 · Scott Nolan · Enrichment levels
Nuclear fuel production has five steps: mining uranium, converting it to gas, enriching it, converting it back to solid, and making fuel pellets.
“you then separate the gas to enrich it, meaning get more density of U-235, the fissile material. You then turn it back into a solid and then you make your fuel pellets.”
0:01:39 · Scott Nolan · Fuel cycle
Nolan says most uranium supplied to the US comes from Kazakhstan and Canada.
“Most of U .S. supply will come from Kazakhstan and Canada.”
0:03:55 · Scott Nolan · Uranium mining
Nolan says about 20% of the cost overruns at the Vogtle nuclear plant were due to interest payments.
“20 % of Vogel's cost overruns were interest rate overruns, interest payment overruns.”
0:16:06 · Scott Nolan · Nuclear costs
Nolan says US mortgage interest rates peaked around 18% in 1981, which he argues made financing large nuclear projects very difficult.
“you had interest rates that peaked, I think, in 1981 on mortgages, like 18 % mortgages at that point.”
0:16:41 · Scott Nolan · Interest rates · 1981
Nolan says the Biden administration aimed to triple US nuclear production by 2050 and the Trump administration wants to quadruple it.
“the Biden administration went into triple nuclear production in the U .S. by 2050. The Trump administration wants to quadruple it.”
0:21:44 · Scott Nolan · Nuclear policy · 2050
Nolan says submarine reactors run on uranium enriched above 90% because refuelling requires cutting the submarine open.
“Submarines care even more about refueling cycles. So when you refill a submarine, you have to cut it open and remove the reactor.”
0:24:52 · Scott Nolan · Naval reactors
General Matter is building its enrichment facility in Paducah, Kentucky.
“The facility that we're building is in Paducah, Kentucky, so Western Kentucky.”
0:25:44 · Scott Nolan · Paducah facility
General Matter's site search took over a year and covered more than 10 states and over 1,000 plots of land before choosing Paducah.
“We went to over 10 states, looked at over 1 ,000 plots of land.”
0:38:29 · Scott Nolan · Site selection
General Matter was down-selected under the Biden administration and awarded $900 million under the Trump administration for building capacity.
“We were down selected under the Biden administration, awarded under the Trump administration earlier this year for a $900 million award for capacity building”
0:34:32 · Scott Nolan · Government funding · 2026
Natural uranium contains about 0.711% uranium-235, the fissile isotope, with the rest mostly uranium-238.
“So uranium out of the ground is 0 .7%, 0 .711 % U235. That's what you want.”
0:40:10 · Scott Nolan · Uranium isotopes
After the Cold War, the US imported blended-down Russian warheads to fuel its reactors under a deal nicknamed Megatons to Megawatts.
“It was nicknamed megatons to megawatts. So we imported Russian warheads, blended them down, ran our reactors on it”
0:00:00 · Scott Nolan · Megatons to Megawatts · 1990s
Nolan says the US once supplied over 90% of global enrichment using a first-generation technology that proved uncompetitive with European and Russian methods.
“We were over 90 % of supply globally. And ultimately that approach, that specific design and technology, was not cost competitive”
0:42:15 · Scott Nolan · US enrichment history · Cold War
Nolan says for some small modular reactors, enrichment-related fuel cost could be up to 50% of total levelized cost of energy.
“at today's market prices, it can be.”
0:33:17 · Scott Nolan · Fuel costs
Scott Nolan joined SpaceX as an intern in 2003, worked on Merlin engine components and Dragon, and left in 2007.
“SpaceX, when I started, I was just an intern in 2003.”
0:30:24 · Scott Nolan · SpaceX career · 2003
General Matter uses an in-house engineering, procurement and construction team, copying a Tesla approach, rather than outsourcing construction.
“we copied the Tesla playbook of build your own in-house construction EPC team.”
0:55:42 · Scott Nolan · Construction
General Matter submitted its license application to the Nuclear Regulatory Commission shortly before the interview.
“We just submitted our NRC license last week.”
0:25:44 · Scott Nolan · NRC licensing · 2026
Nolan says the incumbent enrichers are Russia, China and two European firms using the same underlying technology, with no clean-sheet redesign in decades.
“the last time anyone's done a clean sheet redesign was decades ago.”
0:44:55 · Scott Nolan · Enrichment competition
Nolan interned at Boeing on a cost-plus military program before SpaceX.
“before SpaceX, I did work at one of the aerospace incumbents as an intern. Which one? Boeing.”
0:48:16 · Scott Nolan · Boeing experience
General Matter has not yet disclosed which enrichment technique it will use and plans to reveal it in the first half of the following year.
“our technique is one that we'll unveil first half of next year when we'll talk about it.”
0:37:49 · Scott Nolan · Enrichment technology