Siemens Energy, the German energy group, is no longer acting as a technology supplier for the construction of Hungary’s Paks II nuclear power station. The Russian state nuclear corporation Rosatom, which is the general contractor for the project, confirmed to the news outlet Politico that it had terminated its contract with Siemens Energy.
Rosatom stated that the agreement with Siemens Energy was cancelled at the end of 2025 because the German company could not meet its contractual obligations. The Russian firm added that it only works with partners it considers reliable, but did not specify which obligations were unmet.
Originally, Siemens Energy was contracted to provide control‑electronics for two new reactor blocks at Paks II-essentially the non‑nuclear components of the plant. Those contracts, signed in 2019 and 2020, were made together with the French nuclear company Framatome.
In a statement, a Siemens Energy spokesperson clarified that the termination of the delivery of the control‑systems contract came from the customer, and that at the time of the termination there were no sanctions‑related barriers. The company reiterated that it was fulfilling its contractual duties in accordance with national and international laws, and that the customer had withdrawn their interest at the point when delivery could have taken place.
Rosatom is now already looking for a new supplier. It explained that Siemens Energy’s potential involvement covered only specific elements of the control and regulation system, amounting to less than 4 % of the total equipment scope for the project-an amount it considers non‑critical. The Russian firm said these components can be replaced by Russian or European alternatives and is examining several substitute options, though it has not yet named any prospective companies.