Southern California Edison\u2019s plan to restart San Onofre Nuclear Generating Station unit 2 at 70 percent power for a trial run requires more data and rationale, according to Nuclear Regulatory Commission staff Dec. 18. Even so, a decision by federal regulators whether or not to allow the five-month restart could come as early as February, said Doug Broaddus, chief of the commission\u2019s SONGS special projects branch. Edison presented technical answers to an initial round of questions from commission staff in order to allow engineers to vet the data. Out of 31 commission requests for additional information to the utility, many went unquestioned by commission staff. A few, such as why the utility plans to use the trial run to look backwards after-the-fact at steam generator tube wear rather than relying on predictions, caught some attention. Another is the use of experimental data from Canada to apply to San Onofre. While open to the public, openness clearly made commission staff uncomfortable in its technical atmosphere. Kendra Ulrich, Friends of the Earth nuclear campaigner, and others who were allowed to address staff pressed for transparency of all documents. Edison \u201cexpects us to simply accept this without opportunity for review,\u201d she said. Utility representatives stood their ground on not allowing public transparency of utility data. Edison stated after the meeting that the steam generators\u2019 manufacturer, Mitsubishi Heavy Industries, was not relied on as a source of information for the proposed restart (see sidebar). The utility used assessments from Areva, Westinghouse, and Intertek\/Aptech for assessment of restart potential. Edison is the primary owner and the operator of the facility. San Diego Gas & Electric has a 20 percent share. SDG&E attempted to relinquish ownership of the plant in the past, but was forced to remain part owner by the California Public Utilities Commission.