dry cask storage of nuclear spent fuel · susquehanna dry cask storage susquehanna uses a...
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Earl Easton
Division of Spent Fuel Storage and Transportation
U.S. Nuclear Regulatory Commission
Dry Cask Storage
of Nuclear Spent Fuel
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U.S. Commercial Nuclear
Power Plants
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Commercial Nuclear Power
Generation
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Current Expiration Dates for
existing Reactor Licenses
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Proposed New Nuclear Power Plants
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Existing Commercial Spent Fuel
Storage Facilities
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Spent Fuel Storage by State
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Spent Fuel Storage by State
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Impacts Associated with Transfer of Spent Nuclear Fuel from Spent Fuel Storage
Pools to Dry Storage After Five Years of Cooling, EPRI 11/10
SOURCE:
Spent Fuel Storage over Time
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Spent Fuel Management
Current practice is to move
fuel to dry storage when
reactor storage pools become
filled.
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Spent Fuel Storage Casks
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Preparation of Empty
Canister
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Fuel Loading in Transfer Cask
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Welding of Canister Lid
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Transfer of Canister
into Overpack
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Transfer of Overpack to
ISFSI Pad
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Storage Cask Array on
ISFSI Pad
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NAC MPC Dual-Purpose Canister System
Connecticut Yankee ISFSI
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Susquehanna Dry Cask
Storage
Susquehanna uses a horizontal storage module, a Transnuclear model
NUHOMS 52-B. Note the transporter and alignment of the transport cask so
that the canister containing the spent nuclear fuel can be pushed into the
storage module by a hydraulic ram.
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Impacts Associated with Transfer of Spent Nuclear Fuel from Spent Fuel Storage Pools
to Dry Storage After Five Years of Cooling, EPRI 11/10
SOURCE:
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Evolving Spent Fuel
Management Program
• Blue Ribbon Commission on America’s
Nuclear Future
• Revising the Paradigm on Spent Fuel
storage
• Waste Confidence Decision
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BRC Recommendations
• DOE or FEDCORP may submit an
application for a dry cask storage facility
to NRC - focused on orphan sites?
• Proceeding could be similar to Private
Fuel Storage Application
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Revising the Paradigm Program goals
• Technical basis and regulating long-term storage (100+ years)
• Transition to risk-informed and performance-based regulation
• Evaluate spent fuel storage and transport regulations
• Address issues with transporting very old fuel
• Cradle to grave view including stakeholder input
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• Near-Term
– Evaluate key aging issues important for eventual transportation
– Identify issues requiring further research (e.g. high burnup fuel)
• Long-term
– Demonstration program
– Known condition of spent fuel consistent with transportation requirements
Revising the Paradigm Propose evaluations
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Example: Cladding Integrity
• Safety Functions
– Primary fission product barrier
– Geometry control
– Defense in Depth
• Technical Challenges
– Higher burnup levels
– Temperature effects
– New cladding types
– In-situ monitoring in sealed
canisters 25
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Example: Canister Integrity
• Safety Functions
– Confinement
– Inert environment
– Criticality control
• Technical Challenges
– Long-term corrosion
– Basket properties
– Absorber efficiency
– Monitoring sealed internals
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Example: Overpack
Performance
• Safety Functions
– Shielding
– Heat transfer
– Robustness against severe
events
• Technical Challenges
– Long-term degradation
– Response to external natural
events and external disruption
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Waste Confidence Rule
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Waste Confidence Rule
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Waste Confidence Rule
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Waste Confidence Rule
- Schedule
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Questions ?
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