Diablo Canyon Unit 1 Operating at 50 Percent Power for Planned Tunnel Cleaning

April 9, 2018

AVILA BEACH, Calif. — Pacific Gas and Electric Company (PG&E) today announced that operators at Diablo Canyon Power Plant (DCPP) safely reduced power on Unit 1 to 50 percent in order to conduct a planned cleaning of the unit's intake tunnels, which are located on the non-nuclear side of the plant.

"Performing this work is squarely in line with our commitment to provide our customers with safe, clean, reliable and affordable power.Our team will work throughout the week, and around-the-clock, to safely perform this work and then methodically and safely return Unit 1 to full power," said Jim Welsch, PG&E's Vice President of Nuclear Generation and Chief Nuclear Officer.

During a normal operating cycle at DCPP, it is common for crews to perform a planned cleaning of the plant's cooling water system intake tunnels to maintain maximum efficiency, and to perform other scheduled maintenance.

Unit 1 will return to full power following completion of the work.Unit 2 continues to safely operate at 100 percent power.

About Diablo Canyon Power Plant

Diablo Canyon Power Plant is a nuclear power facility owned and operated by PG&E. Its two units together produce approximately 2,300 net megawatts of carbon-free power.

About PG&E

Pacific Gas and Electric Company, a subsidiary of PG&E Corporation (NYSE:PCG), is one of the largest combined natural gas and electric energy companies in the United States. Based in San Francisco, with more than 20,000 employees, the company delivers some of the nation's cleanest energy to nearly 16 million people in Northern and Central California. For more information, visit pge.com and pge.com/news.