Two federal lawmakers appealed Feb. 6 to the Nuclear Regulatory Commission chair to investigate \u201cnew information\u201d that leads them to believe that Southern California Edison knew more about the potential problems with San Onofre Nuclear Generating Station than the utility let on. \u201cThe new information also raises concerns that [Edison] and Mitsubishi Heavy Industries rejected enhanced safety modifications and avoided triggering a more rigorous license amendment and safety review process,\u201d wrote Sen. Barbara Boxer (D-CA) and Rep. Ed Markey (D-MA) to nuclear agency chair Allison Macfarlane. Mitsubishi manufactured the steam generators for the facility. They showed abnormal wear a year after being installed, leading to a radioactive leak January 2012. Edison, the primary owner of the facility, noted, \u201cIt is simply not accurate to suggest, as the letter does, that when they were installed [Edison] and [Mitsubishi] were aware of serious problems with the design of San Onofre nuclear plant\u2019s steam generators.\u201d Edison \u201cwould never, and did not, install steam generators that it believed would not perform safely,\u201d the utility stated. Friends of the Earth, which is pursuing a retroactive hearing on the nuclear plant\u2019s steam generator replacement at the NRC, noted, \u201cWe didn\u2019t know that [Edison] would go so far as to refuse needed safety changes to the flawed design\u201d in order to avoid license hearings.