In California, there are four active nuclear power plants. These include the Diablo Canyon Power Plant, which has two reactors, and the San Onofre Nuclear Generating Station, which also had two reactors but has since been decommissioned.
The Diablo Canyon Power Plant is located in San Luis Obispo County and has been operational since the mid-1980s. It is one of the state's largest sources of electricity, providing about 9% of California's power. The San Onofre Nuclear Generating Station, located in San Diego County, operated from the 1960s until it was shut down in 2013.
California also has two other nuclear power plants that are no longer operational. These are the Rancho Seco Nuclear Generating Station and the Humboldt Bay Nuclear Power Plant, both of which have since been decommissioned.
It's important to note that while nuclear power plants can provide a significant amount of electricity, they also come with potential risks and concerns about safety and environmental impact. As a result, there has been ongoing debate about the role of nuclear power in California's energy future.