NRC Approves Construction Permit for Dow’s Four-Reactor Seadrift Project

The U.S. Nuclear Regulatory Commission approved a construction permit for Long Mott Generating Station on November 9, 2026. The proposed facility would use four X-energy Xe-100 small modular reactors at Dow’s UCC Seadrift Operations in Seadrift, Calhoun County. Long Mott Energy LLC, a wholly owned Dow subsidiary, is the project developer.

Dow and X-energy describe it as the first advanced nuclear facility approved for a U.S. industrial site and the first high-temperature gas-cooled reactor construction permit in nearly 60 years. The approval does not mean building work has started: engineering and Dow’s investment approvals remain ahead.