Uranium & Nuclear Energy Corner

Thursday, 2026-09-17 · covering the last 24h

Market signal

Spot sits still near $90/lb while nuclear equities take the hit. U3O8 spot held around US$90/lb per public trackers, little changed from recent sessions. The louder move was in equities: nuclear-linked names sold off through the week as an AI-datacentre-demand wobble spread through the sector — the VanEck Uranium and Nuclear ETF, whose top holding is Constellation and which also carries Cameco and Denison, has fallen from a January peak above $160 to below $110, with SMR-adjacent names among the hardest hit (see Holtec, below). Spot chart

Upstream — mining & supply

Russia bans sulphuric acid exports through year-end, hitting the acid Kazakhstan's ISR mines depend on. A resolution signed by Russian PM Mikhail Mishustin on 12 September bars sulphuric-acid exports until 31 December, framed as protecting domestic fertiliser and industrial supply; Kazakhstan takes nearly all of Russia's acid exports and Kazatomprom uses acid as the primary leachant for its in-situ-leach mines, importing roughly a fifth of its annual acid needs mostly from Russia while its own new acid plant slips to late 2027/2028. Exceptions exist for intergovernmental arrangements, but absent one, analysts estimate a hit to Kazatomprom's 2027 output on the order of a few million pounds — a fresh strain on the world's largest producer's supply chain, on top of existing acid-driven guidance cuts. Interfax · The Deep Dive

Stealth startup Fluxnium emerges with DOE-licensed tech to pull uranium from seawater. Fluxnium says polymer fibres braided onto ocean buoys, aquaculture-style, adsorb dissolved uranium over 30–60 days at sea before being brought ashore and eluted into yellowcake; it has licensed the underlying adsorbent chemistry from US national-lab research and closed a US$7 million seed round led by Congruent Ventures, with Constellation Energy — a fuel buyer as well as investor — among the backers. It's an early-stage, unproven route (prior national-lab demonstrations priced seawater uranium above $200/lb) rather than a near-term supply source, but a notable new entrant chasing an unconventional resource estimated at over 4 billion tonnes of dissolved uranium. TechCrunch · Fluxnium

Midstream — conversion, enrichment & fuel

No material conversion, enrichment or fabrication news broke this window.

Nuclear energy — reactors, industry & demand

Holtec postpones its roughly $900m Nasdaq IPO as data-centre demand jitters spread. Holtec Nuclear shelved the listing late on 16 September, a day before it was due to price at US$15–18 a share (implying a valuation up to US$10.2bn); CEO Krishna Singh pointed to market sentiment turning against companies seen as tied to AI-datacentre power demand. It lands as recently listed peers have struggled — Standard Nuclear and X-energy are both trading well below their IPO prices — and marks a pause, not a cancellation, for the SMR-services firm's public-market ambitions. World Nuclear News · Bloomberg (paywall)

The Chatter

Robert Friedland (X): argues the Russian acid ban is a bigger problem for Kazakhstan's ISR uranium than for copper, calling sulphuric acid a non-discretionary input for Kazatomprom and framing the ban as confirmation that "the world's largest uranium producer has a supply chain problem now," part of a wider point about reagent-driven bottlenecks across critical minerals. His view, not this desk's. Post

Asymmetric Research (Substack): works through Kazatomprom's acid math in detail — roughly a fifth of annual acid needs imported, mostly from Russia, against a delayed domestic acid plant — and puts a rough number on it: absent an intergovernmental carve-out, the ban could cost 2027 output on the order of a few million pounds. Its estimate, framed as scenario analysis rather than guidance. Post (paywall)