Energy digest — 2026-10-23
Top line: The lead is a first for the nuclear back end: Finland's Posiva was granted the operating licence for its used-fuel encapsulation and disposal facility at Olkiluoto — the world's first used-fuel repository to get one. Beside it: Westinghouse detailed progress on its $1 billion LEU+ fuel plant in South Carolina, Rosatom said construction of Uzbekistan's planned large reactors should launch in 2027, and the Bannerman–CNNC Etango uranium project in Namibia entered full-scale construction on a final investment decision. New on the day: a first-in-two-decades joint meeting of the NRC and FERC on nuclear generation and grid reliability, a roundup line putting testing under way at China's Linglong One, a second account of the Navy's Radiant microreactor selection, and Los Alamos turning to electrochemistry to clean up retired plutonium gloveboxes — while the Marathon Fusion mercury-to-gold claim stays claims-grade with an unchanged evidentiary basis, now with the NDTV Profit explainer as a second walk-through.
1. Marathon Fusion's mercury-to-gold claim, explained again
What happened: San Francisco-based startup Marathon Fusion says it has converted mercury into stable gold using a process involving fusion neutrons, and NDTV Profit published an explainer (Oct 23) laying out what the company says it did. The claim rests on isotope transmutation inside a suitably designed fusion plant; the company's 2025 paper estimates roughly 2 tonnes of gold annually from such a plant, framed against CERN's demonstrated transmutation record as about a 10x multiple.
What's genuinely new: A second outlet has now walked through the claimed mechanism in detail following the skeptical explainer that surfaced the claim on Oct 22 — but the evidentiary ledger is unchanged: no demonstration, no named partner reactor developer or utility, and no independent verification of the yield math in the window. The story remains claims-grade.
Watch: Independent assessment of the paper's ~2-tonne-per-year yield estimate, and whether Marathon Fusion names a partner reactor developer or utility.
Links: NDTV Profit
2. Posiva granted the world's first operating licence for a used-fuel repository
What happened: Finnish radioactive waste management company Posiva has been granted a licence to operate the encapsulation and final disposal facility for used nuclear fuel at Olkiluoto, Finland (World Nuclear News, Oct 23, ~12:00 PM ET) — per the report, the world's first repository for used fuel to be granted such a licence.
What's genuinely new: the licence itself — used-fuel disposal crossing from construction to operating permission for the first time anywhere, after decades in which no country had an operating repository for spent power-reactor fuel.
Watch: dates for first encapsulation and first emplacement of canisters, annual disposal volumes, and the signal this sends to countries still sitting on spent fuel with no operating disposal route.
Links: World Nuclear News
3. Westinghouse details the $1B LEU+ fuel plant: pre-construction done, NRC amendment path named
What happened: Westinghouse's planned plant, on the site of its Columbia Fuel Fabrication Facility in Hopkins, South Carolina, took a step past the Oct 21 announced investment: the American Nuclear Society reports (Oct 23, ~9:45 AM ET) that pre-construction preparation work on the site is complete, that Westinghouse has engaged with the Nuclear Regulatory Commission since 2024 ahead of submitting a licence-amendment application on the existing facility licence, and that the plant is designed to fabricate fuel with uranium enriched up to 8 percent U-235 at 600 metric tons of uranium per year.
What's genuinely new: status and specifics beyond the $1 billion announcement — pre-construction preparation complete, the regulatory path named as an amendment to the existing Columbia licence rather than a new one, the 8 percent enrichment ceiling reaffirmed, and the 600 MTU/yr target on record. Construction and production remain announced, not built.
Watch: the NRC licence-amendment application's timing, a construction schedule, and customer linkage to the operating fleet or the SMR cohort.
Links: ANS
4. Rosatom eyes a 2027 construction start for Uzbekistan's large reactors
What happened: Rosatom CEO Alexey Likhachev said during a visit to the construction site of Uzbekistan's planned power plant that construction of the large-scale nuclear units there is planned to launch in 2027 (World Nuclear News, Oct 23, ~7:59 AM ET).
What's genuinely new: a dated build-start plan for large reactors in Uzbekistan — a Central Asian build joining an export push that until now ran through Tanzania's mining-and-workforce lane (Oct 11) and the Oct 19 floating-plant agreement for Indonesia. Plan-stage, not ground broken.
Watch: whether construction actually launches in 2027, and unit, capacity, and contract specifics.
Links: World Nuclear News
5. Etango uranium project enters full-scale construction on FID
What happened: A positive final investment decision by the Bannerman Energy–CNNC Overseas joint venture allows Namibia's Etango uranium project to transition into full-scale construction, with commissioning and production targeted for 2028 (World Nuclear News, Oct 23, ~10:13 AM ET).
What's genuinely new: the FID and the move from development-stage commitments to full-scale construction — with a Chinese state-enterprise-backed partner (CNNC Overseas) inside the ownership, and 2028 pinned as the commissioning-and-production target.
Watch: construction milestones against the 2028 target, and production volumes plus offtake arrangements.
Links: World Nuclear News
6. NRC and FERC hold a joint meeting on nuclear generation and grid reliability
What happened: The Nuclear Regulatory Commission hosted the Federal Energy Regulatory Commission for a joint meeting on nuclear generation and grid reliability (ANS, Oct 23, ~4:09 PM ET). The agencies' first joint meeting came 20 years ago, spurred by the 2003 Northeast blackout, during which nine U.S. nuclear reactors tripped offline.
What's genuinely new: the two agencies convene jointly again — a regulator-level forum on nuclear generation and grid reliability, twenty years after the blackout-era precedent set that pattern.
Watch: what comes out of the joint forum — any follow-up actions from either agency on nuclear generation and grid reliability.
Links: ANS
7. Los Alamos turns to electrochemistry to decontaminate retired plutonium gloveboxes
What happened: ANS reported (Oct 23, ~5:04 PM ET) on an electrochemical system for semiautonomous decontamination of radiological gloveboxes at Los Alamos — the heavily contaminated enclosures used in plutonium operations. Every glovebox used in plutonium work eventually reaches the end of its service life, and disposing of one in its contaminated state as transuranic waste is orders of magnitude more expensive than disposal as low-level waste, while consuming limited capacity at the transuranic waste repository.
What's genuinely new: a concrete technique aimed at moving glovebox disposition out of the costliest waste class — contamination stripped electrochemically, run semiautonomously rather than by crews in hands-on contact.
Watch: deployment status at Los Alamos, measured decontamination results, and whether gloveboxes treated this way can be down-classified to low-level waste.
Links: ANS
Brief
- Slovenia's radioactive waste agency has a Deep Isolation cost assessment concluding it would be more economic to place used fuel from the TRIGA II research reactor and from the Krško Nuclear Power Plant in the same deep underground disposal facility (WNN, Oct 23, ~7:06 AM ET). Study-grade — no siting decision or program commitment in coverage: World Nuclear News
- ANS's roundup of new nuclear developments in Europe and Asia (Oct 23, ~1:07 PM ET) adds thin, roundup-grade lines: testing has begun at Linglong One in China, and the Mochovce plant in Slovakia has reached a milestone (unspecified in the roundup). It also recaps Poland's large- and small-reactor projects, Rosatom's floating-plant plans for Indonesia, a nuclear supply-chain conference in the Philippines, and the Radiant microreactor selection for Naval Weapons Station Crane in Indiana — ANS. The Mochovce milestone sits inside the storyline already on record from Oct 16 (grid connection and first electricity) with no new specifics named.
- ANS's separate account (Oct 23, ~2:32 PM ET) of the Department of the Navy announcing on Wednesday (Oct 21) that it has selected Radiant Industries to design, build, and deliver a "prototype microreactor power plant" with the company's Kaleidos design at Naval Weapons Station Crane in Indiana — the same selection, with no new contract value, deployment timeline, or licensing detail: ANS
Dropped
- Business Standard's Oct 23 write-up of the Marathon Fusion mercury-to-gold claim is a same-claim repeat that adds no new facts beyond the Oct 22 and Oct 23 explainers covered above — by its own summary the quantity produced, production cost, and commercial viability remain unclear — so it stands as corroboration inside the claims-grade item rather than a separate story: Business Standard
- World Nuclear News's "Viewpoint: Four million workers won't be enough without the right leaders" (Oct 23) — Isis Leslie, head of leadership and capacity development at the World Nuclear Association, arguing on what the next generation of nuclear leaders will need as the industry pursues a tripling of nuclear capacity, via the World Nuclear University. A labeled opinion piece with no announcement, data point, or event: commentary from an industry body doesn't clear the beat as news: World Nuclear News
- The Globe and Mail's "Can Industrial Heat Demand Drive Growth for NuScale Stock?" (Oct 23, ~12:25 PM ET) is investor commentary in stock-page syndication — a price-information wrapper with no new commercial fact; the NuScale/ENTRA1 up-to-6 GW track remains non-binding with no PPA. An investment-thesis piece doesn't clear the beat as news: The Globe and Mail