David McNew/Getty Images
With both of San Onofre's reactors powered down, the troubled nuclear power plant by the sea is about to get a visit from the chairman of the Nuclear Regulatory Commission, it was announced on Wednesday.
The visit by NRC Chairman Gregory Jaczko emphasizes the concern over safety and equipment that began in January with a radioactive steam leak.
Since then, the commission determined that tubes carrying hot, pressurized, radioactive water inside the steam generators were deteriorating at a dangerous and unusual rate at least in part because they are rubbing against each other.
Amid reports that the nuclear plant misled federal regulators about equipment changes, the plant was barred last week from restarting operations until the situation is understood and resolved.