A transporter moves the transfer cask and canister to a Horizontal Storage Module in the dry storage area. The travel route is a qualified haul path, monitored by the plants security force with multiple security gates.
A transporter moves the transfer cask and canister to a Horizontal Storage Module in the dry storage area. The travel route is a qualified haul path, monitored by the plants security force with multiple security gates.
A transporter moves the transfer cask and canister to a Horizontal Storage Module in the dry storage area. The travel route is a qualified haul path, monitored by the plants security force.
After the dry shielded canister has been sealed the surrounding platform is removed and the transfer cask and canister are loaded onto a truck within the truck bay of the fuel storage building.
After the Dry Shielded Canister has been prepped, an outer lid is installed and welded to the canister and a shielding cover is bolted onto the transfer cask.
After all moisture has been removed from the Dry Shielded Canister (DSC), it is then back filled with helium, an inert gas that prevents corrosion and promotes heat transfer.
After the water is removed from the dry shielded canister (DSC), a vacuum pump and filtration system remove all the remaining moisture from the Canister.
The water is pumped out of the Dry Shielded Canister through small port in the inner lid of the canister. That port connects to a drain tube installed in the canister which extends to the very bottom of the canister. The water is pumped back to the Spent Fuel Pool where it originated.
After loading the used fuel assemblies, the shield plug is installed and the transfer cask is removed from the loading pool. The outside of the transfer cask is decontaminated as it leaves the pool.
Underwater view of Spent Fuel Assemblies being removed from the Spent Fuel Pool and loaded into the dry shielded canister. The crane motion shown does not reflect actual crane speed which is much slower.
Elevated view of Fuel Assemblies being removed from the Spent Fuel Pool and loaded into the dry shielded canister. The crane motion shown does not reflect actual crane speed which is much slower.
After the dry shielded canister (DSC) has been prepped to receive the used nuclear fuel assemblies, the surrounding platform is removed. Then the transfer cask with the dry storage canister is lifted out of the cask preparation area and lowered into the cask loading pool where the fuel assemblies will be moved into the DSC.
The annulus between the transfer cask and the dry shielded canister (DSC) is filled with purified water and a large inflatable o-ring is used to seal the top of the annulus. The purified water and o-ring ensure that the outside of the canister stays clean and is not contaminated while submerged in the Cask Loading Pool.
When the transfer cask is ready, the Dry Shielded Canister is retrieved and is lowered into the transfer cask leaving a small gap or ring called an annulus between the canister and the cask.
The transfer cask is then upended and lifted by crane and moved to the Cask Preparation Area. Once the transfer cask is in place, a movable platform is lowered around the transfer cask. This platform provides personnel with access to the DSC for preparations, welding and vacuum drying.
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