A former manager at California’s San Onofre nuclear power plant is suing the facility’s owners for allegedly firing him in retaliation for reporting safety concerns. Paul Diaz says officials at Southern California Edison fired him shortly after the U.S. Nuclear Regulatory Commission ordered the company to address what it called a “chilling effect” on addressing workplace safety. Diaz’s lawsuit says the NRC first investigated the plant after it received anonymous reports of infractions, including “shortcuts on testing new generators, unreported safety violations, falsifying records, promoting a culture of cover-up” and ignoring chronic fatigue amongst overburdened workers.