Task 3.3 Fuel Transfer System Conceptual design Joel Janssens SCKCEN LEADER WP3 Technical Meeting, Karlsruhe, 20/11/2012 Copyright © 2011 SCKCEN

Fuel Transfer System MYRRHA - ALFRED comparison © SCKCEN ComponentItemMYRRHAALFRED ReactorIn vessel storageYes In-vessel fuel storage no Cooling period420d (840d) (not fixed) 10d (confirmed) FAGeometryHexagonal wrapper, wired fuel pin Hexagonal wrapper ReshufflingAt the bottom, by IVFH machine On top, no in- vessel machines Loading/unloadingTop loading

Fuel Transfer System MYRRHA - ALFRED comparison © SCKCEN ComponentItemMYRRHAALFRED FAFuel vector (U,Pu)O2 MOX–30%PuU / Pu / minor actinides Max. burn-up60MWd/kgHM100MWd/kgHM (confirmed as target) Deacy heat1200W/FA8.600W/FA (confirmed) Max. clad T600°C (long exposure time to creeps, 10y) 650°C (short exposure time to creep, confirmed)

Fuel Transfer System MYRRHA - ALFRED comparison © SCKCEN ComponentItemMYRRHAALFRED StorageStorage periodSeveral decades Storage typeDry storageWet storage – in water Storage Containment In canisterDirect contact Storage coolingGas convectionNatural convection

Fuel Transfer System MYRRHA - ALFRED comparison © SCKCEN ComponentItemMYRRHAALFRED TransferContainmentIn canister (probably) Providing limited shielding In canister (flask) Providing limited shielding Building requirement Red zone - No hot cell Red zone – No hot cell ReliabilityBack-up system Cleaning before storage Probably notno FA leak testyes

Fuel Transfer System CFD © SCKCEN 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 © SCKCEN CFD simulation / output data: Case 1: 8.6kW, natural convection, thermal radiation, no cask check in all conditions - > safety authorities

Fuel Transfer System CFD © SCKCEN CFD simulation / output data: Case 2: 4.3kW, natural convection, thermal radiation, cask check in all conditions - > safety authorities

Fuel Transfer System CFD © SCKCEN 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 © SCKCEN 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 © SCKCEN Fuel transfer lay-out: concept check in all conditions - > safety authorities

Fuel Transfer System Cask © SCKCEN Cask: concept check in all conditions - > safety authorities

Fuel Transfer System Gripper © SCKCEN Gripper: concept check in all conditions - > safety authorities

Fuel Transfer System Canister © SCKCEN Canister: concept check in all conditions - > safety authorities

Fuel Transfer System Problem & concerns © SCKCEN Fuel active zone above lead level, but not cooled. check in all conditions - > safety authorities

Copyright notice Copyright © SCK  CEN 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. SCKCEN Studiecentrum voor Kernenergie Centre d'Etude de l'Energie Nucléaire Stichting van Openbaar Nut Fondation d'Utilité Publique Foundation of Public Utility Registered Office: Avenue Herrmann-Debrouxlaan 40 – BE-1160 BRUSSEL Operational Office: Boeretang 200 – BE-2400 MOL