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Terrestrial Energy and NRG PALLAS Begin Final Phase of Graphite Irradiation Testing for Supplier Selection
Materials testing enables selection of graphite grade and licensing for its Generation IV Integral Molten Salt Reactor (IMSR) nuclear technology, designed to
About this update from Terrestrial Energy Inc.
[{"type":"text","content":"Materials testing enables selection of graphite grade and licensing for its Generation IV Integral Molten Salt Reactor (IMSR) nuclear technology, designed to supply high- temperature, clean, firm and flexible thermal and electric energy, with sector-competitive economics and leading time-to-market at fleet scale Testing leverages world-class testing and research capabilities of the NRG PALLAS Petten Research Centre’s High Flux Reactor CHARLOTTE, N.C. and PETTEN, The Netherlands, July 08, 2025 (GLOBE NEWSWIRE) -- Terrestrial Energy Inc., (Terrestrial Energy) a developer of small modular nuclear power plants using Generation IV reactor technology, and NRG PALLAS, a global leader in nuclear science and technology, today announced the start of the final phase of its graphite irradiation and selection program for Terrestrial Energy’s Integral Molten Salt Reactor (IMSR). The irradiation tests, conducted at NRG PALLAS’ High Flux Reactor (HFR) in Petten in the Netherlands, will enable Terrestrial Energy to finalize the qualification of graphite for licensing and operation of its IMSR plant. Terrestrial Energy’s IMSR is a thermal spectrum reactor that uses ~125 tonnes of graphite as the neutron moderator. The completion of tests at NRG PALLAS’ HFR, one of the most powerful multi-purpose research and test reactors in the world, will confirm the predicted performance of selected graphite grades throughout the seven-year operating cycle of each IMSR Core-unit. The Company sourced multiple graphite grades from suppliers of nuclear graphite in western markets, including the U.S., to commence a test program in 2020 for the selection and qualification of the most suitable graphite grade. The test program benefits from NRG PALLAS’ decades of experience performing materials irradiation tests for nuclear reactor development, as well as the engineering expertise of the Frazer-Nash Consultancy. “Comprehensive irradiation tests are essential for advanced reactor development and reactor licensing, as they validate the performance of critical materials under actual operating conditions. Our pioneering work with NRG Pallas is providing the data needed to make our final graphite grade selection for the IMSR, marking another important milestone in our supply chain development,” said Simon Irish, CEO of Terrestrial Energy. “NRG PALLAS’ technical expertise ...