Osvaldo calzetaFE DESIGN - International Atomic Energy Agency
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SIMPOSYUM SMALL MODULAR REACTORS FOR NUCLEAR POWER RIO DE JANEIRO JULIO 2014 RIO DE JANEIRO JULIO 2014 FUEL ELEMENT DESIGN FOR THE FUEL ELEMENT DESIGN FOR THE FUEL ELEMENT DESIGN FOR THE FUEL ELEMENT DESIGN FOR THE CAREM CAREM-25 REACTOR 25 REACTOR M. Markiewicz F l El t D i Di i i Fuel Element Design Division Bariloche Atomic Centre Argentina Atomic Energy Commission
Transcript of Osvaldo calzetaFE DESIGN - International Atomic Energy Agency
SIMPOSYUM SMALL MODULAR REACTORS FOR NUCLEAR POWERRIO DE JANEIRO JULIO 2014RIO DE JANEIRO JULIO 2014
FUEL ELEMENT DESIGN FOR THEFUEL ELEMENT DESIGN FOR THEFUEL ELEMENT DESIGN FOR THE FUEL ELEMENT DESIGN FOR THE CAREMCAREM--25 REACTOR25 REACTOR
M. Markiewicz
F l El t D i Di i iFuel Element Design Division
Bariloche Atomic Centre
Argentina Atomic Energy Commission
CONTENTCONTENT
Design DescriptionDesign Description
Functional RequirementsFunctional Requirements
Criteria and Design LimitsCriteria and Design LimitsCriteria and Design LimitsCriteria and Design Limits
Design VerificationDesign Verification
DevelopmentsDevelopments
DESIGNDESIGN DESCRIPTIONDESCRIPTION
FUEL ELEMENT FUEL ELEMENT
Main Dimensions and dataMain Dimensions and dataMain Dimensions and data Main Dimensions and data
Shape HexagonalTotal length 1800 mmTotal length 1800 mmNumber of fuel rods 108Number of guide thimbles 18Number of guide thimbles 18Instrumentation thimble 1Number of spacer grids 4Pitch 13.8 mmDistance between FE 160 mmWeight 100 kg
DESIGN DESCRIPTION (cont.)DESIGN DESCRIPTION (cont.)FuelFuel ElementElementFuel Fuel ElementElement
DESIGNDESIGN DESCRIPTION (cont.)DESCRIPTION (cont.)
FUEL RODFUEL ROD
Main Dimensions and DataMain Dimensions and DataMain Dimensions and Data Main Dimensions and Data
Total length 1600 mmActive length 1400 mmActive length 1400 mmCladding outside diameter 9 mmCladding thickness 0.625 mmCladding thickness 0.625 mmPellet diameter 7.6 mmFuel density 95 %Plenum volume 6.8 cm3
Cladding material Zry-4Fuel pellet UO2/UO2-Gd2O3
DESIGN DESCRIPTION (cont.)DESIGN DESCRIPTION (cont.)F lF l R dR dFuel Fuel RodRod
DESIGNDESIGN DESCRIPTION (cont.)DESCRIPTION (cont.)
CONTROL RODCONTROL ROD
Main Dimensions and DataMain Dimensions and DataMain Dimensions and Data Main Dimensions and Data
Total length 1708 mmActive length 1400 mmActive length 1400 mmCladding outside diameter 8.5 mmCladding thickness 0.65 mmCladding thickness 0.65 mmPellet diameter 7 mmPellet length 50 mmCladding material AISI 316 LAbsorbent pellet Ag-In-Cd
DESIGNDESIGN DESCRIPTION (cont.)DESCRIPTION (cont.)ControlControl RodRodControl Control RodRod
DESIGNDESIGN DESCRIPTION (cont.)DESCRIPTION (cont.)ControlControl RodRod ClusterClusterControl Control RodRod ClusterCluster
FUNCTIONALFUNCTIONAL REQUIREMENTSREQUIREMENTS
Provide and maintain acceptable fuel geometry and position Provide and maintain acceptable fuel geometry and position i ll di ll d di lldi llaxially and axially and radiallyradially
Provide for acceptable coolant flow and heat transferProvide for acceptable coolant flow and heat transfer
Provide a barrier to separate fuel from coolantProvide a barrier to separate fuel from coolant
Allow for axial and radial expansion of FR and FEAllow for axial and radial expansion of FR and FE
Provide structural resistanceProvide structural resistance
Resist action by fluid forcesResist action by fluid forcesResist action by fluid forcesResist action by fluid forces
FUNCTIONALFUNCTIONAL REQUIREMENTS (cont.)REQUIREMENTS (cont.)
Provide for control of the fission processProvide for control of the fission process
Provide for inProvide for in--core instrumentationcore instrumentation
Accommodate chemical, thermal, mechanical and irradiation Accommodate chemical, thermal, mechanical and irradiation effects on materialseffects on materials
Provide for handling, shipping and core loadingProvide for handling, shipping and core loading
Provide compatibility for all fuel elements within the coreProvide compatibility for all fuel elements within the core
CRITERIACRITERIA AND DESIGN LIMITSAND DESIGN LIMITS
Th l f
FUEL RODFUEL ROD
Thermal performance
-maximum heat flux
-maximum temperature of fuel pellet
Pellet-cladding interaction limit to linear powerPellet cladding interaction, limit to linear power
Maximum hydrogen content on FR and cladding
Corrosion rate, limit to the oxide thickness
Cladding collapse
CRITERIACRITERIA AND DESIGN LIMITS (cont.)AND DESIGN LIMITS (cont.)
FUEL ROD (cont.)FUEL ROD (cont.)
Static loads on the cladding
- circumferential stress
- equivalent stress
Dynamic loadsDynamic loads
Fretting wearFretting wear
Cladding strainCladding strain
Internal pressureInternal pressure
CRITERIACRITERIA AND DESIGN LIMITS (cont.)AND DESIGN LIMITS (cont.)
Thermal performance
CONTROL RODCONTROL ROD
p
- maximum temperature of absorbent
- avoid coolant boilingavoid coolant boiling
Cladding collapse
Fretting wear
Stresses on the claddingStresses on the cladding
Cyclic stresses
Residence time
CRITERIACRITERIA AND DESIGN LIMITS (cont.)AND DESIGN LIMITS (cont.)
FUEL ELEMENTFUEL ELEMENT
Static loads
Normal Normal OperationOperation ConditionsConditions
Static loads
Dynamic loads
Irradiation growth
CRITERIACRITERIA AND DESIGN LIMITS (cont.)AND DESIGN LIMITS (cont.)
FUELFUEL ELEMENT (cont.)ELEMENT (cont.)
AccidentAccident ConditionCondition
Maximum cladding temperature
Maximum cladding oxidationMaximum cladding oxidation
Seismic event
Reactivity insertion
DESIGN VERIFICATIONDESIGN VERIFICATION
Fuel rod behavior with simulation code
Mechanical strength
Analysis of control rod behavior
Material characterization
Hydrodynamic tests
Seismic tests
I di ti f f l dIrradiation of fuel rods
DEVELOPMENTSDEVELOPMENTS
Fuel pellets
LaboratoryLaboratory -- PilotPilot plantplant -- FabricationFabrication
Fuel cladding
Fuel pellets
Spacer grids
Fuel rodsFuel rods
Control rods
Fuel elements
FUEL ELEMENTFUEL ELEMENT
SPACER GRIDSPACER GRID
TOP AND BOTTON NOZZLETOP AND BOTTON NOZZLE
FiniteFinite elementelement evaluationevaluation
FUEL ELEMENT PROTOTYPEFUEL ELEMENT PROTOTYPE
THANKTHANK YOU !!!!!!!!!YOU !!!!!!!!!
