Orange County Register
Posted by Teri Sforza, Register staff writer
The nuclear power plant in your back yard, San Onofre Nuclear Generating Station, has some “substantive” issues with human performance.
In 2007, Nuclear Regulatory Commission inspectors logged:
* nine findings of human performance problems (“failing to provide adequate procedures or work instructions”)
* and another eight findings tied to “problem identification and resolution” (“failing to thoroughly evaluate problems such that the resolutions address causes”).
In a letter to San Onofre’s bigwigs, the NRC said: “To address these problems, we understand your staff has developed a performance improvement plan. However, implementation of these actions has not been effective in addressing this issue.”
All 17 of the NRC’s findings had “very low safety significance,” though, the NRC says. (Feel better?!)
The Watchdog will be detailing San Onofre’s inspection reports in this space in the coming weeks. In the meantime, the NRC will hold a public meeting on San Onofre’s safety record at 6:30 p.m. Thursday, July 31, at the Country Plaza Inn, 35 Via Pico Plaza, San Clemente.
Not only will NRC staff be there, but reps from Southern California Edison – the company that runs San Onofre – will be there as well. Folks can ask questions and everything.
Read the current performance information on San Onofre here or here.
For highlights from the NRC’s Annual Assessment Letter on San Onofre, keep reading.
* “Overall, San Onofre Nuclear Generating Station…operated in a manner that preserved public health and safety….”
* “The NRC staff has identified a substantive crosscutting issue in the human performance area at San Onofre Nuclear Generating Station. There were a total of nine Green findings (green is the lowest level finding) with crosscutting aspects in the human performance area….. involving instances of failing to provide adequate procedures or work instructions. Four Green findings were related to this theme, affecting the Mitigating Systems and Barrier Integrity cornerstones. Examples of these included: a failure of operations personnel to address high offsite power voltage on multiple occasions, inadequate procedures to establish temporary ventilation in the safety-related switchgear rooms when the normal ventilation system was out of service, and inadequate procedures for installation of a feedwater isolation valve hydraulic pump discharge filter housing. To address these problems, we understand your staff has developed a performance improvement plan. However, implementation of these actions has not been effective in addressing this issue.”
* “The NRC staff has also identified a substantive crosscutting issue in the problem identification and resolution area at San Onofre Nuclear Generating Station. There were a total of eight Green findings with crosscutting aspects in the problem identification and resolution area…. involving instances failing to thoroughly evaluate problems such that the resolutions address causes and extent of conditions. Six Green findings were related to this theme, affecting the Mitigating Systems cornerstone. Examples of these included: a failure to promptly identify and correct the formation of gas pockets in the piping of the Units 2 and 3 component cooling water systems, ineffective corrective actions for a failed control room annunciator for actuation of the backup nitrogen supply to the instrument air system, and a failure to prevent recurrence of premature tripping of … thermal overloads used for equipment protection on safety-related equipment. To address these problems, we understand your staff has developed a performance improvement plan. However, full implementation of these actions is not yet complete. “
The NRC will focus its inspections on these “substantive crosscutting issues” until it determines that the problems have been addressed.








