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Independent Spent Fuel Storage Installation (ISFSI ) Dry Cask Storage NUCP 2311. 1982 Congress Passed Nuclear Waste Policy Act Spent Fuel Pools near Capacity 1 st Dry Storage System licensed in 1986 at Surry Power Station. History. 27 Dry Storage Sites (as of March 2003)
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Independent Spent Fuel Storage Installation (ISFSI)Dry Cask StorageNUCP 2311
1982 Congress Passed Nuclear Waste Policy Act Spent Fuel Pools near Capacity 1st Dry Storage System licensed in 1986 at Surry Power Station History
27 Dry Storage Sites (as of March 2003) Licensed at Reactor Sites 1 Licensed for TMI-2 Fuel Debris History
Licensing • 10CFR72 • Dry Storage Casks • Designs Approve by NRC • Currently 15 in use (as of December 2004) • Independent Spent Fuel Storage Installation (ISFSI) • Site-Specific • General
Licenses (one or both) Storage Transport Specifications 17 feet height 180,000 lbs. (230,000 lbs. fully-loaded) Holds 30 – 60 fuel assemblies Licensing – Dry Storage Casks
Licensing – Dry Storage Casks • Maximum Burnup 60 MWD/MTU (most around 45 MWD/MTU) • Minimum Decay time in SFP:5 – 10 years • 20 – 30 kW thermal (depends on size) • Maximum Enrichment 5%
Typical Materials Structural Carbon Steel Stainless Steels Concrete Shielding Borated Resin Borated Aluminum Lead Licensing – Dry Storage Casks
Licensing – Dry Storage Casks • Mother Nature • Wind / Tornados • Missiles (trees, telephone poles) • Snow and Ice • Earthquakes • Accidents • Cask Tip-over • Cask Drop • Fire • Loss of Cooling (vents blocked)
Licensing – ISFSI Pad • Example Pad (At Indian Point Energy Center) • 3 feet thick • 100 x 200 feet • 21 miles of rebar • 2000 cubic yards of concrete
Licensing – ISFSI Vaults • Pre-made concrete structures • Assembled on-site
CASTOR – General Nuclear Systems, Inc. NUHOMS – Transnuclear, Inc. NAC – NAC International, Inc. Dry Storage Casks - Types
Dry Storage Casks - Loading • Loading Cask in SFP
Dry Cask Storage - Loading • Remove water and fill with Inert gas • Bolt and Weld Lid
Dry Cask Storage - Transportation • Load onto Cask Transporter
Dry Cask Storage - Transportation • Place on Cask Pad or in Vault
Dry Cask Storage - Transportation • Transport off-site • Train, Barge, and Truck
ISFSI Summary • ISFSI is a good temporary disposal method • New casks designs can be safely transported to Yucca Mountain • New cask designs can handle high-burnup fuel