Xe-100

Overview

80 MWe high-temperature gas-cooled reactor (HTGR) using TRISO fuel, deployable as single unit or in a four-pack configuration for 320 MWe.

DOE ARDP-funded HTGR advancing NRC licensing. The first deployment is the Amazon-backed Cascade Advanced Energy Facility with Energy Northwest in Washington (four units / 320 MWe, upsizable to 960 MWe), with construction targeted around 2030 and operations in the mid-2030s. The NRC issued a Finding of No Significant Impact for Dow's four-unit Seadrift project in Texas, and in June 2026 X-energy submitted the Xe-100 into the UK Generic Design Assessment toward a 6 GW build-out with Centrica. New gigawatt-scale evaluations are underway with Talen Energy (Pennsylvania) and LG&E and KU (Kentucky).

Key Specs