Siemens Energy, a German power‑technology firm, is no longer acting as a technical supplier for Hungary’s Paks II nuclear power plant project. Rosatom, the Russian state nuclear company and general contractor for the plant, terminated the contract, as confirmed to the news outlet Politico by both companies.
Rosatom said the agreement was cancelled at the end of 2025 because Siemens Energy was unable to meet its contractual obligations. The Russian state company emphasized that it partners only with reliable providers, but it did not specify which commitments were not fulfilled. The original scope involved providing the control‑electronics for the non‑nuclear portion of the two new reactor blocks at Paks II. Those contracts were signed in 2019 and 2020 together with the French nuclear firm Framatome.
A Siemens Energy spokesperson clarified that the contract termination came from the customer’s side. At the time of cancellation, there were no sanctions‑related obstacles. The spokesperson added that Siemens Energy had met its duties in accordance with national and international law, but the client had withdrawn its interest at a point when service could still have been rendered.
Rosatom is now searching for a new supplier. In its statement, the company noted that Siemens Energy’s role was limited to only a few elements of the control and regulation system-less than four percent of the project’s total equipment-so its loss is not critical. Rosatom said that the required equipment could be replaced by Russian or European alternatives and that it is already evaluating several replacement options, though it has not named any potential suppliers.
