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Task 3.3
Fuel Transfer System
Conceptual design
Joel JanssensSCK•CEN
LEADER WP3 Technical Meeting, Karlsruhe, 20/11/2012 Copyright © 2011
SCK•CEN
Fuel Transfer System MYRRHA - ALFRED comparison
© SCK•CEN
Component Item MYRRHA ALFRED
Reactor In vessel storage YesIn-vessel fuel storage
no
Cooling period 420d (840d) (not fixed)
10d (confirmed)
FA Geometry Hexagonal wrapper, wired fuel pin
Hexagonal wrapper
Reshuffling At the bottom, by IVFH machine
On top, no in-vessel machines
Loading/unloading Top loading Top loading
Fuel Transfer System MYRRHA - ALFRED comparison
© SCK•CEN
Component Item MYRRHA ALFRED
FA Fuel vector (U,Pu)O2 MOX–30%Pu U / Pu / minor actinides
Max. burn-up 60MWd/kgHM 100MWd/kgHM(confirmed as target)
Deacy heat 1200W/FA 8.600W/FA (confirmed)
Max. clad T 600°C (long exposure time to creeps, 10y)
650°C (short exposure time to creep, confirmed)
Fuel Transfer System MYRRHA - ALFRED comparison
© SCK•CEN
Component Item MYRRHA ALFRED
Storage Storage period Several decades Several decades
Storage type Dry storage Wet storage – in water
Storage Containment
In canister Direct contact
Storage cooling Gas convection Natural convection
Fuel Transfer System MYRRHA - ALFRED comparison
© SCK•CEN
Component Item MYRRHA ALFRED
Transfer Containment In canister (probably)Providing limited shielding
In canister (flask)
Providing limited shielding
Building requirement
Red zone - No hot cell
Red zone – No hot cell
Reliability Back-up system Back-up system
Cleaning before storage
Probably not no
FA leak test yes yes
Fuel Transfer System CFD
© SCK•CEN
CFD simulation / input data: Steady state FA:
Hexagonal 127pins/FA height 600mm Active profile: axial cosine with extrapolation length of 1.035m Total pin length 1430mm Pin external diameter: 10.50mm Pin material: MOX Wrapper: T91 Cladding: Ti15-15 N2 environment
Residual decay heat after 10d: 8.6kW/FA
Criterium: cladding temp. <650°C (due to creep)
check in all conditions
- > safety authorities
Fuel Transfer System CFD
© SCK•CEN
CFD simulation / output data: Case 1: 8.6kW, natural convection, thermal radiation, no cask
check in all conditions
- > safety authorities
Fuel Transfer System CFD
© SCK•CEN
CFD simulation / output data: Case 2: 4.3kW, natural convection, thermal radiation, cask
check in all conditions
- > safety authorities
Fuel Transfer System CFD
© SCK•CEN
CFD simulation / output data: Case 3: 8.6kW, forced convection 2m/s at bottom of cylinder,
thermal radiation, cask (cylinder dia. 200mm)
check in all conditions
- > safety authorities
Fuel Transfer System CFD
© SCK•CEN
CFD simulation / output data: Case 4: 8.6kW, forced convection 20m/s at bottom of cylinder,
thermal radiation, cask (cylinder dia. 200mm)
check in all conditions
- > safety authorities
Fuel Transfer System Lay-out
© SCK•CEN
Fuel transfer lay-out: concept
check in all conditions
- > safety authorities
Fuel Transfer System Cask
© SCK•CEN
Cask: concept
check in all conditions
- > safety authorities
Fuel Transfer System Gripper
© SCK•CEN
Gripper: concept
check in all conditions
- > safety authorities
Fuel Transfer System Canister
© SCK•CEN
Canister: concept
check in all conditions
- > safety authorities
Fuel Transfer System Problem & concerns
© SCK•CEN
Fuel active zone above
lead level, but not cooled.
check in all conditions
- > safety authorities
Copyright notice
Copyright © 2011 - SCKCEN
All property rights and copyright are reserved. Any communication or reproduction of this document, and any communication or use of its content without explicit authorization is prohibited. Any infringement to this rule is illegal and entitles to claim damages from the infringer, without prejudice to any other right in case of granting a patent or registration in the field of intellectual property.
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