Vallecitos Nuclear Center

The Vallecitos Nuclear Center is a nuclear research facility, and the site of a former GE Hitachi Nuclear Energy electricity-generating nuclear power plant in unincorporated Alameda County, California, United States. The facility is approximately 30 miles east of San Francisco, under jurisdiction of the US Nuclear Regulatory Commission's Region IV.
The Vallecitos boiling water reactor was the first privately owned and operated nuclear power plant to deliver significant quantities of electricity to a public utility grid. During the period October 1957 to December 1963, it delivered approximately 40,000 megawatt-hours of electricity. This reactor—a light-water moderated and cooled, enriched uranium reactor using stainless steel-clad, plate-type fuel—was a pilot plant and test bed for fuel, core components, controls, and personnel training for the Dresden Nuclear Power Plant, a Commonwealth Edison station built in Illinois five years later.

Wikipedia