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Vogtle 3&4 Update

  • By Admin
  • June 1, 2020
  • 31 Views

The final module for Vogtle’s Unit 3, a massive water tank, had been placed atop the containment vessel and shield building roof last week.  This is the final major lift for the unit 3 team at the construction site in GA.  

The Passive Containment Cooling Water Tank module measures 35 feet tall with an outer diameter of 85 feet. The tank module, including the outfitting and rigging, weighs more than 720,000 pounds and took a year for crews to assemble at ground level.

“This is an important milestone for the project and signifies the topping out of the Shield Building for the unit,” said Bechtel Project Director Brian Reilly.

The tank is a major part of the AP1000’s safety systems. The water tank system requires no active intervention from the operator or electricity in order to bring the reactor to a safe shutdown state. The tank will hold approximately 750,000 gallons of cooling water ready to flow down into the containment vessel in the event of an emergency, even if external power is lost. The water could also be directed to top off the spent fuel pool, while the tank itself can be refilled from water stored elsewhere on site.

Fit-out and preparation continues inside, but setting the module completes the distinctive silhouette of the AP1000 design.

“This is a significant day on the project because this is the last big, heavy lift for Unit 3,” added Reilly. “I am extremely proud of the team that completed this milestone task. They safely delivered an impressive milestone in challenging circumstances for our customer. We continue to make progress on the project as we transition these units closer to operation. We are proud to be a part of building the future of nuclear power in the United States.”

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