The U.S. Nuclear Regulatory Commission began a special inspection last week at South Texas Project nuclear power plant into two incidents at the site, which led to separate, unplanned shutdowns of both Units 1 and 2.

• On May 12, a transformer that supplies off-site power to the station shut down unexpectedly and took Unit 2 off line.
• On July 24, a fire in an electrical switchyard at the site caused an unplanned shutdown of Unit 1.