licensing a centralized spent fuel storage facility...mr. miguel a. martinez hlw engineering...
TRANSCRIPT
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International Workshop on the Development and Application of a
Safety Case for Dual Purpose Casks for Spent Nuclear Fuel.
IAEA Headquarters. Vienna, Austria.
Licensing a Centralized Spent Fuel Storage
Facility
ENRESA (National Enterprise for Radioactive Waste)
Mr. Miguel A. Martinez HLW Engineering Department
May 20th 2014
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Licensing a Spent Fuel Storage Facility
ALMARAZ I Y II
JOSÉ CABRERA
ASCÓ I Y II
VANDELLÓS I
VANDELLÓS II
STA. Mª DE GAROÑA
COFRENTES
TRILLO
• 10 Nuclear Reactors
• 7 reactors in operation at 5 sites
– 7.400 MW
– 21% of country’s electricity generation (2012)
• 2 NPP shut down under decommissioning
• 1 NPP stopped
NPPs LOCATION AND SF SITUATION
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Licensing a Spent Fuel Storage Facility
1.- Reracking 90´s
2.- ISFSI 2000-2016
3.- ATC 2017-2077
4.- DGP 2068-
MANAGEMENT STRATEGY FOR SF AND HLW
• PROVIDING ENOUGH CAPACITY TO ASSIST THE OPERATION OF NPPS
WHILE LOOKING FOR A FOR LONG TERM INTERIM STORAGE SOLUTION. • PLANNING FOR LONG-TERM DISPOSAL SOLUTIONS
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Licensing a Spent Fuel Storage Facility
General aspects of SNF management
• Different options presented and assessed according Spanish Nuclear Program Size
– Deep Geological Disposal preferred
• Needs extended public acceptance and technical development
• Interim storage in the meantime
- It allows R&D to provide solutions to future decisions: confirming geological disposal or even
coming back to recycling if advanced cycles are industrially deployed.
- Centralized solution preferred with ad-hoc facilities when needed
• Conclusions:
– The priority is the Centralized Interim Storage Facility (ATC)
– Complemented by In situ Increased Storage capacity when required
– Deep Geological Disposal studies continuation to support decision making about
management options. Considered as an assumption for financing the Waste Fund.
– R&D Plan 2009-2013. Following one is being prepared.
– Costs supported by the NPPs as a fee on nuclear electricity gross production
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Licensing a Spent Fuel Storage Facility
(CENTRALIZED STORAGE FACILITY FOR SF) ATC. MAIN ADVANTAGES OF ATC OPTION
ATC (CENTRALIZED STORAGE FACILITY FOR SF AND HLW)
• Enables SF and HLW common management
Interim management becomes
independent of (disposal)
• Provides extra capacity to deal
with potential unexpected events
• Reduces the amounts of management facilities thus decreasing the risks and
obligations
• Allows the declassification of nuclear grounds after NPPs decommissioning
• Allows to comply with existing obligations of bringing back waste from foreign
reprocessing
• Significantly saves costs
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Licensing a Spent Fuel Storage Facility
Vaults for spent fuel and high level waste (vitrified) and a Concrete building for medium long-lived waste
Selected criteria:
• Safety: - Multiple barrier confinement (Passive safety features) - Cooling by natural flow - Low doses
• Economy: - Compact and modular - Low operating costs
• Strategy: - Independence between management stages - Long life design - Reversibility - Flexibility
• Internationaly proven technology
SELECTED TECHNOLOGY: VAULTS AND CONCRETE BUILDING
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Licensing a Spent Fuel Storage Facility THE FULL EXTENT OF ATC FACILITIES
• ATC AND ANCILLARIES • Main facility: Storage vaults, reception and process areas • ILW-GTCC Storage building, casks storage, maintenance workshop
• ASSOCIATED RESEARCH CENTER
• SF and Radwaste lab (Integrated in the Nuclear Installation) • Conventional labs
• BUSINESS PARK
Enterprises center Industrial area
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Licensing a Spent Fuel Storage Facility
Contains:
• Vaults for spent fuel and high level waste (vitrified) and a concrete building for medium long-lived waste
Selected technology criteria:
• Design: - Multiple barrier confinement - Cooling by natural draft - Low dose
• Economy: - Compact and modular - Low operating costs
• Strategy: - Independence among management stages - Long life design - Reversibility - Flexibility
• International benchmark of technology
SELECTED TECHNOLOGY: VAULTS AND CONCRETE BUILDING
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Licensing a Spent Fuel Storage Facility
CONCEPTUAL DESIGN
http://www.enresa.es/publicaciones_y_audiovisuales/videos_e_interactivos/interactivo_atc
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Licensing a Spent Fuel Storage Facility
PROPOSED LAYOUT
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Licensing a Spent Fuel Storage Facility
SECTION
CELDA DEDESCARGA
CONTENEDOR
DE MANEJO
ZONA DE
PREPARACIÓNDE CONTENEDORES
NIVEL +17.000
NIVEL +23.500NIVEL +22.700
NIVEL +25.800
NIVEL +45.500
NIVEL +8.500
NIVEL +0.000
NIVEL - 6.500
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Licensing a Spent Fuel Storage Facility
LIFE MANAGEMENT PLAN
PITCH = 1600 x 17501
HEAT INSULATING
THICKNESS: 50mm
1415
SHIELDING PLUGØ ext. 1030 x 10 thk
Ø ext. 960 x 10 thk
(WELL)
ext. 1030 x 4 thk
(Air double jacket)
CANISTERS
(See detail)
4 GUIDES
INTERMEDIATE FLOOR
3 (clearance)
SHOCK ABSORBER
Ø ext. 810 x 4 thk
LOWER GUIDE
PLATE FOR HORIZONTALITY
ADJUSTMENTANCHORS
(Out of scope)
SITE WELD AFTER
x, y POSITIONNING
15000
1500
1240
225
4780
2300
300
4780
13500
2400
H (
See
note
1)
Ø ext. 910 x 6 thk
Ø 920
66
Ø 220
95
43
50
(H
EIG
HT
OF
CU
PR
O-A
LU
AN
D H
OLL
OW
ED
AL
U
BLO
CK
IN
TE
RN
AL P
AR
TS
)
(EX
CE
PT
ED
FO
R F
UE
L A
SS
EM
BL
IES
AN
D B
OT
TLE
S T
YP
E 1
4 x
14)
292
0 (
HE
IGH
T O
F C
UP
RO
-ALU
AN
D H
OL
LO
WE
D A
LU
B
LO
CK
IN
TE
RN
AL
PA
RT
S)
(ON
LY
FO
R F
UE
L A
SS
EM
BLIE
S A
ND
BO
TT
LE
S T
YP
E 1
4 x
14
)
95
11
0
DETAIL OF CANISTER
NOTE 1
H = 3340 mm for short canister of fuel assemblies and bottles type 14x14
H = 5030 mm for long canister of fuel assemblies type BWR 8x8 bottles
H = 47800 mm for standard canister (other fuel assemblies and bottles)
CELDA DEDESCARGA
CONTENEDOR
DE MANEJO
ZONA DE
PREPARACIÓNDE CONTENEDORES
NIVEL +17.000
NIVEL +23.500NIVEL +22.700
NIVEL +25.800
NIVEL +45.500
NIVEL +8.500
NIVEL +0.000
NIVEL - 6.500
3 Axes
Fuel Metallic
components
Concrete
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Licensing a Spent Fuel Storage Facility
DESIGN REQUIREMENTS & CRITERIA
Main Facility Postulated Accidents: • Transport Cask - Vehicle Collision Accidents - Cask Tip over
• Handling: - Spent Fuel Element Drop. - HLW/MLW cask fall (applicable also for the CMF). - Loss of Process Building HVAC.
• Storage : - SF Canister & HLW Canister Drop. - Partial obstruction of convective air flow on vaults/ Chimney loss. - Loss of Process Building HVAC.
• Other: - Shielding Function Failure. - Confinement Barrier Failure. - SSC Structural Failures - Internal Fire
• External: - Long term loss of external power supply. - Earthquake - Internal Flooding - Tornados & Lightning.
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Licensing a Spent Fuel Storage Facility
ATC RECEPTION BUILDING
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Licensing a Spent Fuel Storage Facility
ATC PROCESS BUILDING
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Licensing a Spent Fuel Storage Facility
ATC STORAGE BUILDING (VAULTS) PHASE 1
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Licensing a Spent Fuel Storage Facility
VAULTS AND TUBES DETAILS
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Licensing a Spent Fuel Storage Facility
STORAGE VAULTS HEAT REMOVAL PRINCIPLE
PLANIFICACIÓN Y DECISIÓN POLÍTICA
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Licensing a Spent Fuel Storage Facility
CASK INTERIM STORAGE FACILITY
CASK BUFFERING:
Immediate needs from NPPs.
ISFI´s liberations
Operational need for the ATC cell.
Preliminar capacity for 70 casks.
Design according nuclear standards.
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Licensing a Spent Fuel Storage Facility
• Dual Purpose Casks are presently
licensed for Storage in NPP ISFSI´s,
some in buildings and some in pads.
• Dual Purpose Casks shall have to be re-
licensed for storage in the ICSF storage
conditions at Villar de Cañas
(Eartquake, external flooding,,etc.,
etc.).
• Thermal, shielding, criticality analysis
must be performed with the most
unfavourable combination of casks.
• Cask interim Facility should be operable
before the main facility, to accomodate
particular needs of the different
ISFSI´s.
• Cask Interim Facility Layout
CASK INTERIM FACILITY NEW STORAGE LICENSING CONDITIONS.
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Licensing a Spent Fuel Storage Facility
CASK MAINTENANCE FACILITY
LIGHT MAINTENANCE POSITIONS
DECONTAMINATION CELL
INTERNAL MAINTENACE POSITION
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Licensing a Spent Fuel Storage Facility CASK MAINTENANCE FACILITY (CMF)
• Maintenance Types:
- “Light”: Only external maintenance 20 ÷ 80
operations / year - “Heavy”: Internal decontamination
in hot cell, Internal & external maintenance
• 15 operations / year - Up to 3 casks simoultaneously.
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Licensing a Spent Fuel Storage Facility CASK MAINTENANCE FACILITY (CMF) CASK RECEPTION DOCKING
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Licensing a Spent Fuel Storage Facility
CASK MAINTENANCE FACILITY (CMF) DECONTAMINATION & INTERNAL MAINTENANCE
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Licensing a Spent Fuel Storage Facility
CASK MAINTENANCE FACILITY (CMF) INTERNAL MAINTENANCE
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Licensing a Spent Fuel Storage Facility
CASK MAINTENANCE FACILITY (CMF) EXTERNAL MAINTENANCE & SHIPMENT
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Licensing a Spent Fuel Storage Facility
• Generic Design of a vault-type facility in 2003 • Approved with conditions by the CSN (Spanish Safety Authority) in 2006
• Complementary preliminary projects developed between 2006 and 2010:
• Loaded Cask Facility • Spent Fuel and Radioactive Waste Laboratory • Cask Maintenance Facility
• Preliminary Characterization of the three areas offered by the Municipality
• 1st Phase of the detailed study of the site finally purchased
• Awarding Process & Selection of the Engineering Companies
• Preliminary Safety Assessment Report (PSAR) + Environmental Impact Assessment (EIA): Previous and Construction Permits
• Detailed Design
• Industrial classification of the site
• Ongoing information to local stakeholders
PROJECT STATUS
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International Workshop on the Development and Application of a
Safety Case for Dual Purpose Casks for Spent Nuclear Fuel.
IAEA Headquarters. Vienna, Austria.
Licensing a Centralized Spent Fuel Storage
Facility
ENRESA (National Enterprise for Radioactive Waste)
Mr. Miguel A. Martinez HLW Engineering Department
May 20th 2014