SAN CLEMENTE, Calif. (AP) - The California Public Utilities Commission approved a massive $680 million renovation that would extend the life of the San Onofre Nuclear Generating Station by at least 13 years. The commission on Thursday gave Southern California Edison the green light to replace four aging steam generators that power the two nuclear reactors at the seaside plant about 60 miles south of Los Angeles. Under the PUC's decision, Edison's ratepayers would be on the hook for up to $782 million, including possible cost overruns. Customers would pay about 50 cents extra on their monthly bills beginning in...