pressurized water reactor constructed by Bechtel and rated at 1347 MWthermal . It began commercial operation on January 1, 1968, and ceased operation on November 30, 1992. Defueling was completed on March 6, 1993. On December 28, 1993, NRC approved the Permanently Defueled Technical Specifications. On November 3, 1994, SCE submitted a Proposed Decommissioning Plan to place SONGS-1 in SAFSTOR until the shutdown of Units 2 and 3. On December 15, 1998, following a change in NRC decommissioning regulations, SCE submitted a post shutdown decommissioning activities report (PSDAR) for SONGS-1, to commence DECON in 2000. SCE actively decommissioned the facility, and most of the structures and equipment have been removed and sent to a disposal facility. The NRC issued a license amendment in February 2010 releasing the off-shore portions of the Unit 1 cooling intake and outlet pipes in place, under the Pacific Ocean seabed, for unrestricted use. The fuel from Unit 1 was transferred to Phase 1 of the independent spent fuel storage installation (ISFSI). In 2015, the ISFSI was expanded onto the area previously occupied by Unit 1 in order to store all Unit 2 and Unit 3 spent fuel. SCE completed transferring all of the nuclear fuel to dry storage in 2020. The Unit 1 Reactor Pressure Vessel was transported via rail and then highway to the Energy Solutions disposal facility in Clive, Utah. The shipment left May 24, 2020 from San Onofre and arrived at the disposal facility on July 14, 2020. Safety issues The San Onofre station had technical problems over the years. In July 1982, Time wrote, "The firm Bechtel was ... embarrassed in 1977, when it installed a 420-ton nuclear-reactor vessel backwards" at San Onofre. In 2008, the San Onofre plant received multiple citations over issues such as failed emergency generators, improperly wired batteries and falsified fire safety data. In its annual review of 2011, the Nuclear Regulatory Commission (NRC) identified improvements but noted that in the area of human performance, "corrective actions to date have not resulted in sustained and measurable improvement". According to the NRC, workers at San Onofre were "afraid they will be retaliated against if they bring up safety problems, something that's against the rules". As of 2011, according to the NRC, there had been progress on the issue and the problems were not considered a threat to the safety of plant workers or the public. In November 2011,