OPPD officials notified the Nuclear Regulatory Commission on Monday, Nov. 14, that the Fort Calhoun Station (FCS) defueling outage has been completed. The defueling outage ended on Thursday, Nov. 10, 17 days after it began.
The work began on Nov. 3 and 4, when the head from the reactor vessel was removed and placed on the head stand (shown below) within the FCS containment building.
The defueling outage, which started Oct. 24, is going well, said Craig Longua, outage manager at FCS.
“Everyone has stayed focused on safety and strong human performance. We are working safely and efficiently,” he said. “We’ve had no injuries, and we are doing better than our outage dose goal for radiation exposure.”
From Oct. 29 through early Monday, Nov. 7, employees successfully offloaded the nuclear fuel from the reactor core. The following photos show the process as it occurred.
Overnight Nov. 8 into the morning of Nov. 9, employees lifted the reactor vessel head and installed it atop the reactor cavity, where the vessel head will then be bolted into place.
On Nov. 10, workers at FCS installed six studs into the plant’s reactor vessel head, completing the physical work for the defueling outage. The Outage Control Center was secured at 2:46 p.m. that day, officially marking the end of the outage.
This process was completed safely and efficiently with zero injuries or safety issues.
With all of the nuclear fuel assemblies now safely moved from the reactor to the spent-fuel pool, Fort Calhoun Station is ready to transition from an operating state to decommissioning. Below are some highlights from the events of Nov. 10.
About Andrew Roger
Andrew Roger is a multimedia contributor to The Wire and digital media coordinator at Omaha Public Power District. Andrew produces powerful videos and photos to highlight OPPD’s impact in Nebraska. View all posts by Andrew Roger →