·  Completion of the Structural Integrity Test and Integrated Leak Rate Test – The structural integrity test and integrated leak rate test were completed in succession and demonstrated the containment vessel meets construction quality and design requirements.

·  Placement of the final module for Unit 3 – The water tank that sits atop the containment vessel and shield building roof, known as module CB-20, is a major part of the AP1000 reactor’s advanced safety system and will hold approximately 750,000 gallons of water ready to flow down in the unlikely event of an emergency to help cool the reactor.

·  Placement of the Unit 3 integrated head package (IHP) atop the reactor vessel – Standing 48 feet tall, weighing 475,000 pounds and containing more than three miles of electrical cables, the IHP will eventually be used by highly-trained nuclear operators to monitor and control the nuclear reaction that will occur inside the Unit 3 reactor vessel. 

·  Completion of Open Vessel Testing for Unit 3 – This successfully demonstrated how water flows from the key safety systems into the reactor vessel ensuring the paths are not blocked or constricted, and confirmed the pumps, motors, valves, pipes and other components of the systems function as designed.

· Placement of the polar crane and containment vessel top for Unit 4 – This signifies that all major lifts inside the containment vessels for both units are now complete.