On 13 October 2026, ZE PAK, its subsidiary PAK Pątnów 2 (rebranded "PAK SMR") and SGE signed a shareholders' agreement to create a joint-venture special-purpose vehicle for a nuclear project at the Pątnów site near Konin. The JV will develop up to six GE Vernova Hitachi BWRX-300 small modular reactors, with a planned combined capacity of about 1,800 MWe — by far the largest single BWRX-300 commitment announced to date outside North America and the first to specifically target a former lignite site.
The agreement is a genuine milestone, but it is a corporate milestone, not a construction one. No EPC contractor has been named, no financing structure is public, no site licence has been applied for and no final investment decision has been taken. Metal procurement of any kind — structural steel, reinforcement, pressure-boundary materials, piping — remains speculative. Readers looking for supplier opportunities should treat this as a watch item, not a bid pipeline.
What the agreement actually does
The shareholders' agreement (ZE PAK current report 28/2026) establishes the JV structure and splits roles:
| Party | Role in JV | Contribution / basis |
|---|---|---|
| SGE S.A. (formerly Synthos Green Energy; founded by Michał Sołowow) | Managing partner, majority shareholder | Holds the exclusive right to promote and implement the BWRX-300 within the Pątnów area and a 10 km radius; co-owner of the BWRX-300 standard design alongside GVH, OPG and TVA |
| ZE PAK S.A. via PAK Pątnów 2 (PAK SMR) | Minority shareholder, site provider | Owns freehold and perpetual usufruct over the Pątnów land |
| GE Vernova Hitachi Nuclear Energy (GVH) | Technology owner and licensor | BWRX-300 design; not an equity party at this stage |
The transfer of SGE's licensing rights into the SPV is the mechanism that lets the JV hold a single interface with GVH. ZE PAK's contribution is essentially land plus site services; it is not a capital-heavy participant. This asymmetry matters: the project's financial and technical risk sits primarily with SGE, whose wider Polish programme (26 units under government Decisions in Principle, with an initial CfD application covering 14 units at Włocławek, Stawy Monowskie and Stalowa Wola) is far from bankable itself.
Why Pątnów, and why it matters beyond itself
Pątnów is a case study in the Polish coal transition. The site's older lignite units were retired at the end of 2024; its 474 MW Pątnów II unit runs on an extended life with a 409 MW capacity obligation for 2026, and lignite extraction from the adjacent Pątnów IV deposit ended in 2023. ZE PAK has been looking for a post-coal future for the Konin region for years — this is its third attempt at nuclear at the site (an earlier SMR initiative and a larger reactor plan both stalled).
What is different this time:
- The BWRX-300 has an operating reference build. OPG's Darlington unit is under construction, with BWXT contracted for the first reactor pressure vessel and roughly 80% of that project's supply chain in Ontario. SGE's design co-ownership gives it direct insight into Darlington's cost and schedule performance.
- GVH has industrialised delivery. The October 2025 GE Vernova Hitachi–Samsung C&T alliance, and the September 2026 Studsvik agreement for four BWRX-300 units in Sweden, show a repeatable commercial template: GVH supplies the nuclear island, a construction partner executes, a local developer provides the site and offtake.
- The Polish programme has regulatory scaffolding. Decisions in Principle cover up to 26 BWRX-300s; the National Atomic Energy Agency (PAA) has issued a general opinion on the technology. Pątnów would still need its own site licence.
That is the real significance: Pątnów is the first BWRX-300 project to be sited on a retiring coal plant with established grid connection, land title and a capacity-market history. If it works, the model is replicable across Central Europe's coal regions.
What is still missing
The unresolved list is long and commercially decisive:
- EPC/EPCI contractor — not identified. Samsung C&T is the obvious candidate given the GVH alliance, but no selection has been disclosed.
- Final number of units — "up to six" is not six.
- Financing — no capital structure, debt package or state-aid route (CfD, contract-for-difference, or capacity mechanism) is public. SGE announced a PLN 500 million investor commitment to its broader BWRX-300 programme in late September 2026, but that is programme-level, not Pątnów-specific.
- Schedule and FID — no target dates have been stated.
- Site licensing — not yet initiated for Pątnów specifically.
Each of these is a precondition for meaningful equipment procurement. Until at least FID and likely the EPC award, no credible steel, piping, valve, pressure-vessel or balance-of-plant tender can be expected.
The steel angle — deliberately muted
The BWRX-300 is marketed on reduced material intensity: lower concrete and steel volumes per MWe than large LWRs, simpler seismic category and modular open-top construction, with a 24–36 month construction target. Even at six units, Pątnów's structural steel demand would be measured in tens of thousands of tonnes — meaningful for regional fabricators but small relative to a conventional 1,800 MWe nuclear or CCGT build.
The more relevant European steel linkage is upstream: BWRX-300 pressure-boundary components have so far been sourced from North American and Korean supply chains (BWXT for the first RPV; Samsung C&T for delivery). Whether the Pątnów units localise fabrication — for example through Polish or wider EU heavy forging and fabrication capacity — is an open question that the JV has not addressed. Any localisation commitment would likely be negotiated as part of the EPC package and Polish-content conditions attached to any CfD.
For now, the honest conclusion is that no procurement is open and none is imminent. This article should be revisited when the EPC route and financing framework are disclosed; that is when supplier engagement will begin in earnest.
What to watch next
- JV close and SPV registration — confirms the agreement is operational, not merely signed.
- EPC strategy announcement — Samsung C&T, a Polish-led consortium, or a split nuclear-island/balance-of-plant package. This determines the procurement structure.
- CfD or equivalent support application for Pątnów — SGE's Polish programme has already applied for a CfD on 14 units at other sites; Pątnów's inclusion would signal state backing.
- PAA site licence application — the first hard regulatory gate.
- FID and first concrete — the point at which real steel demand begins.
Assessment
Pątnów is the most concrete expression yet of the SGE–GVH strategy to convert Poland's coal belt into an SMR fleet, and the ZE PAK shareholders' agreement gives it a credible land and corporate foundation. But the project remains at announcement stage. Six BWRX-300s at Pątnów would be a substantial industrial undertaking if built; today, the deliverable is a signed JV agreement, a site, and a technology licence. The gap between that and a steel order book is measured in years and in several undisclosed decisions.