Long Mott Generating Station
Proposed nuclear power station
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The Long Mott Generating Station is a planned nuclear power station in Calhoun County, Texas. It will consist of four 80 MWe Xe-100 small modular reactors (SMRs) and is being developed by X-energy and Dow Chemical Company. The plant will produce both power and process heat for Dow's Seadrift chemical facility, which is currently powered by natural gas, and is expected to come online in the early 2030s. It is expected to be the first commercial facility in the United States to use an advanced reactor for process heat.[1]
| Long Mott Generating Station | |
|---|---|
| Country | United States |
| Location | Calhoun County, Texas |
| Status | Proposed |
| Owner | Long Mott Energy |
| Nuclear power station | |
| Reactor type | HTGR |
| Reactor supplier | X-energy |
| Thermal capacity | 800 MWth |
| Power generation | |
| Make and model | Xe-100 |
| Units planned | 4 × 80 MWe |
| Nameplate capacity | 320 MWe |
History
X-energy, a Rockville, Maryland-based SMR developer, received $80 million in 2020 from the Department of Energy's Advanced Reactor Demonstration Program (ARDP) to build four units of their 80 MWe (200 MWth) Xe-100 SMR, as well as to build a fuel fabrication facility for TRISO fuel.[2]
Union Carbide, a subsidiary of Dow, operates the Seadrift Operations site, also known as Long Mott. The site manufactures around 4 billion pounds of plastics and other materials per year. Natural gas turbines located onsite supply both electricity and process heat.[3]
In May 2023, X-energy and Dow announced the selection of the Seadrift Operations site for deployment of four Xe-100 reactors.[4] During operation, two reactors would supply electricity to the facility while the third would supply 200 MWth of heat in the form of steam. The fourth would supply and sell power to the grid.[3] The project will receive milestone-based funding through the ARDP.[5]
X-energy broke ground on their TX-1 fuel fabrication facility, which will fabricate the company's proprietary TRISO-X fuel, in Oak Ridge, Tennessee in 2022. The facility is supported by the ARDP as well as the Inflation Reduction Act.[5]
Dow's subsidiary, Long Mott Energy, LLC, submitted their construction permit to the Nuclear Regulatory Commission (NRC) on March 31, 2025.[6] The NRC expects to complete their review within 18 months. However, Dow stated that they may not make a final decision to fund the project until 2028, after submitting an operating license application to the NRC.[7]