FILE - In this Sept. 21, 2016, file photo, V.C. Summer Nuclear Station's unit two's turbine is under construction near Jenkinsville, S.C., during a media tour of the facility. Newly unsealed court documents show the former top executive for the contractor hired to build two South Carolina nuclear reactors that were never finished won’t face criminal charges. The Post and Courier reports former Westinghouse CEO Danny Roderick is now a government witness for a federal investigation into the failed multibillion project to build the reactors at the V.C. Summer site. (AP Photo/Chuck Burton, File)