Nuclear Power in 2026: The Operating Record, the Cost of Building New, the Small Reactors, and the Data Centers 94 U.S. reactors ran at 91.0% in 2025, new nuclear costs $175 to $255 per megawatt-hour, and no small reactor powers any data center—delivered small-reactor capacity is zero megawatts. objectivedailynews.com/special-r…