Westinghouse executives told the House Energy, Federal Relations and Technology Committee that the company is advancing a suite of nuclear technologies and long‑duration thermal storage that it says can serve utilities, industry and remote customers.

John Battellini, vice president for new market development at Westinghouse, described the company’s portfolio as spanning large reactors (AP1000), a small modular reactor (AP300) and a microreactor (eVinci). "We are the only company offering all three asset classes," Battellini said, summarizing Westinghouse’s strategy to provide a range of sizes and applications.

AP1000 and AP300: Battellini said the AP1000 (a Gen‑III+ pressurized water reactor) has operating units in China and the United States and that lessons from those projects inform the AP300 small modular reactor design. Westinghouse described the AP300 as a roughly 330‑megawatt electric, single‑loop SMR that shares proven AP1000 technology and passive safety features but reduces component count and the overall safety‑related footprint. The company told the committee it is engaging the U.S. Nuclear Regulatory Commission and has submitted white papers and design material in pre‑licensing steps with the aim of a design certification filing in 2025–26 and an initial commercial deployment in the early 2030s.

eVinci microreactor: Mike Velour, who led the microreactor portion of the presentation, described Westinghouse’s eVinci design as a transportable 5‑megawatt electric microreactor with an eight‑year refueling cycle and passive heat transfer. Velour said components and fuel installation would occur at a U.S. manufacturing facility, and the reactor would be delivered to site with fuel already installed and — critically, he said — removed after its operating life with spent fuel still inside the unit. "This design allows for the elimination of the tie between nuclear reactors requiring spent fuel storage on the site of operation," Velour said, arguing that removable, factory‑sealed units reduce long‑term site liabilities and could expand siting options.

Long‑duration thermal storage: Battellini also briefed the committee on a Westinghouse thermal energy storage project funded by the U.S. Department of Energy for Alaska. He described the system as large‑scale, thermal (mineral‑oil and heated concrete elements), intended to provide 10+ hours of duration for grid services and renewable firming, and scheduled for a 2029 in‑service target after FEED and a multi‑year build. Westinghouse said the technology is intended for applications where hours‑to‑days energy shifting, grid stability and resilience are required.

Why this matters: Westinghouse told the committee its portfolio covers multiple potential Montana use cases — from large utility plants to SMRs and microreactors for remote loads, and thermal storage to firm variable renewables. Committee members asked about licensing timelines, supply chains, constructability and community engagement; Battellini described ongoing NRC engagement and supplier partnerships, and he said Westinghouse is pursuing local supplier development for deployments.

The session included Q&A on efficiency comparisons between pumped hydro and thermal storage, and on community engagement and siting in Alaska and other western states; Battellini said Westinghouse has held stakeholder meetings in Alaska and is working with local partners on early projects.

Materials and contact information were provided to committee staff for follow‑up and technical questions.