SAN LUIS OBISPO, Calif. (AP) — Federal regulators have cited the Diablo Canyon nuclear power plant for a problem that may have knocked out a reactor cooling system for a year-and-a-half.
The Tribune of San Luis Obispo says the Nuclear Regulatory Commission issued a "white finding" on Thursday. That color-coding means the problem created a low-to-moderate safety risk at the Central California nuclear plant.
During a test in May, workers found that an emergency cooling system for one of the two reactors wasn't working — and may not have been operating since it was last checked in October 2014.
The problem was traced to an improperly installed switch.
A spokesman says the plant operator, Pacific Gas & Electric, has corrected the problem and it plans to appeal the NRC finding.