a de facto license amendment requiring an adjudicatory public hearing, for three independent reasons: the SCE proposal to limit unit 2 to 70% power is inconsistent with the license, so constitutes an amendment; unit 2 cannot safely operate within the full license scope, so the license needs to be amended; restarting the plant with the steam generator tubes in the current degraded state is outside historical experience, and the proposal to operate them at 70% power for a limited duration before reinspection constituted the regulatory definition of "tests or experiments", requiring a license amendment. In May 2013, Senator Barbara Boxer asked that the United States Justice Department investigate possible malfeasance by Edison officials, and released a 2004 letter by an Edison executive that expressed worries that the new steam generators, though similar, would not be "like for like" replacements and could lead to the same kind of potential "disastrous" issues that in fact led to the plant's shutdown in 2012. In making the request for a possible criminal investigation, Boxer stated "This correspondence leads me to believe that Edison intentionally misled the public and regulators in order to avoid a full safety review and public hearing in connection with its redesign of the plant." Edison denied any wrongdoing. but reportedly signaled it might shut the plant down for good should the company not be allowed to restart one of the reactors at 70% of capacity. Plant closure, June 2013 On June 7, 2013, Southern California Edison announced it would "permanently retire" Unit 2 and Unit 3, ending their attempt to restart the plant at a reduced capacity. The utility said it would cut the SONGS workforce from about 1,500 to some 400 employees, with most reductions "expected to occur in 2013". The company also said it would "pursue recovery of damages from Mitsubishi Heavy Industries, the supplier of the replacement steam generators", although the contract limited liability to $138 million and excluded consequential damages. The chief executive of Edison International explained that the current licenses expire in 2022, and with post-Fukushima requirements, which include re-evaluating earthquake vulnerability, it was uncertain renewal would be economic, so it made little sense making costly and politically difficult repairs now that would not make a return on investment before 2022. California Senator Dianne Feinstein signaled approval of the decision to permanently close the plant, stating "I firmly believe this is the right thing to