SAN ONOFRE, Calif. — U.S. Nuclear Regulatory Commission officials are scheduled to meet with Southern California Edison executives Wednesday to discuss proposed license amendments that would allow the utility to restart the troubled San Onofre Nuclear Generating Station at 70 percent power.
No decision on a restart will be made at the meeting in Rockville, Md., according to the NRC.
Edison’s draft license amendment seeks to change a technical section requiring structural integrity of steam generators from “across the full range of normal operating conditions” to compliance at 70 percent power. It also includes a promise that power would not exceed that amount, which equates to 3,438 megawatts thermal.
Another license section, which currently states that the reactors are allowed to operate at 100 percent power, would be changed to 70 percent power, or 2,406.6 megawatts thermal.
Edison requested that the NRC rule on the proposed amendments by May 24. The utility’s plan to restart the plant at a lower power had been known previously.
The nuclear power plant on the northern San Diego County coastline has been shut down since January 2012, when a small, non-injury leak occurred in one of the reactors. The other reactor was undergoing maintenance and not operating at the time.
An investigation found that vibration caused premature wear in steam generator tubes.
SCE said operating Unit 2 — the reactor where the leak did not occur — at a lower power level would allow it to supply electricity to the region during the summer months without causing any potential damage to the tubes.
“Since last fall, SCE has provided the public and the NRC with detailed analyses from global experts that support safe restart of Unit 2,” said SCE President Ron Litzinger. “We are considering the proposed voluntary amendment as the best path to get Unit 2 safely up and running before the hottest months of the year hit our region.”
SCE wants to operate the reactor at 70 percent for five months, then shut it down so its steam generator tubes can be inspected. The reactor would resume at 70 percent for 18-24 months while officials use the inspection data to determine a safe long-term operating level.
Friends of the Earth, an anti-nuclear group that opposes a restart and wants tighter scrutiny of San Onofre’s license, contends Edison is trying to avoid a safety review and public hearing.
“The NRC must stand firm and demand a comprehensive license amendment process that includes all safety issues and the opportunity for a full public hearing,” said Kendra Ulrich, nuclear campaigner for Friends of the Earth. Unit 2 is “a severely damaged reactor that is unsafe to operate,” she said.
The group also objects to today’s meeting being held out of state because local interested parties will not be able to participate.
San Diego Gas & Electric owns 20 percent of the plant and receives one- fifth of the generated electricity.