Team Hot RodDesign Review

Andy Griff, Bill Crane & Jerrod WarnerNovember 15, 2007 JEB 111, Moscow, ID

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BackgroundIdaho National Laboratory (INL)Hanford fuel assembliesHot Cell environmentFuel disassembly

Cut hex ductRemove fuel elementsContainerize

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Problem Statement

Design, build, and test a device for use in a “hot cell” environment that

is capable of separating 169 fuel elements from a hexagonal grid plate

assembly.

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Mock-Up

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Task AnalysisFive Tasks

Securing of fuel assemblyPositioning/alignmentPin removalFin removalElement removal

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Pin Removal (Design 1)Lever ArmPros

Mechanical advantage

Simple operation (MSM)

ConsPin and linkage

alignmentSize

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Pin Removal (Design 2)Screw Punch

(Manual/Pneumatic)

ProsEase of use (MSM)Minimizes impactSize

ConsAlignmentVisibility

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Fin Removal (Design 1)Gripper Rail SystemPros

Use of rod contourRange of motion

ConsElement spacingAdjacent row

alignmentAlternate gripping

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Fin Removal (Design 2)Grip Fin Rail SystemPros

Balanced forceExisting surface

areaNot cantilevered

ConsRod/Fin integrityPrecise movements

(MSM)

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Fin Removal (Design 3)Gripping Element

EndsPros

Gripping areaEasy access

ConsRow clearanceSlippingFin binding

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Element Removal (Design 1)Waffle MakerPros

Elements secured rigidly

Use of existing fin holes

ConsElement spacingPositioning

elements (weight)

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Element Removal (Design 2)Fin/Element

CombinationPros

Combines processesElements held by

contourCons

Element spacingBinding

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Element Removal (Design 3)Push PinPros

Only hold one element

Minimal binding moment

Element spacing irrelevant

ConsRemoving push pinPin alignment

Element Holder

Push Pin

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Element Removal (Design 4)Individual Element

RemovalPros

Eliminates stepsEasy motionsCompact size

ConsClearance issuesRod end support

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Axiomatic DesignFR 0 Remove Fuel Elements DP a Punch/Gripper/HolderFR 1 Remove Grid Plate Pins DP a Punch rodFR 1.1 Align on pin holes DP 1.1a Set Screw/SliderFR 1.2 Brace for removal DP 1.2a Pneamatic clamp on hex headFR 1.3 Push/Pull pins DP 1.3a Punch

 1 Lever Arm2 Threaded/Pneumatic (MS manipulator)

FR 2 Remove Grid Plate Fins DP 2a Element gripper/railFR 2.1 Align on fins or hex duct DP 2.1a Slider on gripperFR 2.2 Brace for removal DP 2.2a Rail SystemFR 2.3 Grip fins/elements DP 2.3a Gripper

 

1 Element contour follower2 Grip Fin 3 Ends of elements

FR 2.4Pull/Slide fins away from hex head DP 2.4a Threads on linear slider-rail

1 Fin/Element Combination

FR 3Remove Fuel Elements from Fins DP 3a Holder

FR 3.1 Align on fins/elements DP 3.1a master/slave manipulationFR 3.2 Brace for removal DP 3.2a Holder mechanism

 1 Wafflemaker2 Contour follower on element end

FR 3.3 Push/Pull elements DP 3.3a Slider

 1 Fin slider using existing holes2 Push Pin

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Schedule/Work PlanSenior Snapshot (Nov. 30th)Final Design Chosen (Dec. 5th)Semester Report (Dec. 7th)Detailed Design (Jan. 9th-Feb. 15th)Build Prototype (Feb. 15th-Mar. 28th)Prototype Testing (Mar. 28th-Apr. 11th)INL Presentation (Apr. ???)Engineering Expo (Apr. 25th)

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Questions/Ideas (Tom & Jim)Verify cut locationPneumatic devices onsite (grippers, motors,

etc…)Table information (dimensions, etc…)Clearance under sidebackSideback dimensionsPositioning method/equipment (specific way?)Fin material strengthParts from dummy assemblyPositions/Securing ideas?