X-energy and Dow are developing the Long Mott Generating Station, a four-unit Xe-100 high-temperature gas-cooled plant (4 x 80 MWe, 320 MWe) at Dow's Seadrift, Texas site, under the DOE Advanced Reactor Demonstration Program on a 50/50 cost share. It would be the first grid-scale advanced reactor at an industrial facility in the US, supplying electricity and steam to Dow's operations and replacing ageing fossil-fuel infrastructure; Fluor is the EPC partner. The NRC accepted the construction permit application in May 2025 for an 18-month review, the first such application for a high-temperature gas-cooled reactor, and completed its environmental review with a Finding of No Significant Impact in May 2026. On 30 October 2026 X-energy announced that the NRC had issued its Final Safety Evaluation Report, completing both primary reviews; the construction permit decision is the remaining step. Amazon invested $700 million in X-energy in 2025. Earlier records targeted construction in 2026 and operations in 2030, while Dow has indicated it will not commit to a final investment decision until around 2028.