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DOE Light Water Reactor Sustainability Program

DOE Light Water Reactor Sustainability Program

Research and Development Initiative

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Stories

America's nuclear fleet goes digital

Built World

Supporting industry digital transformation through R&D and demonstrations

The NRC approved something unprecedented in January 2026: replacing analog safety controls at an operating reactor with fully digital systems. Constellation's $167 million upgrade at Limerick replaces 1980s-era control rooms with digital command centers — the first time regulators have approved swapping multiple analog safety systems for a single digital platform with fuel rods still running.

Updated May 21