Diablo Canyon’s two units in San Luis Obispo produce approximately 18,000 gigawatt-hours of electricity annually – enough to power approximately three million California homes – with almost zero greenhouse gas emissions.

Though Diablo Canyon’s current federal operating licenses expire in 2024 and 2025 for units 1 and 2 respectively, the federal license extension review process is expected to take a few years, the company said.

John Conway, senior vice president of energy supply and chief nuclear officer at PG&E, said: “As a company and as a state we must support every option for meeting California’s ambitious greenhouse gas reduction goals while providing 24/7 reliability. Extending Diablo Canyon’s ability to operate for another 20 years helps us do just that.”