Team Hot RodDesign Review

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

2

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

Cut hex ductRemove fuel elementsContainerize

3

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.

4

Mock-Up

5

Task AnalysisFive Tasks

Securing of fuel assemblyPositioning/alignmentPin removalFin removalElement removal

6

Pin Removal (Design 1)Lever ArmPros

Mechanical advantage

Simple operation (MSM)

ConsPin and linkage

alignmentSize

7

Pin Removal (Design 2)Screw Punch

(Manual/Pneumatic)

ProsEase of use (MSM)Minimizes impactSize

ConsAlignmentVisibility

8

Fin Removal (Design 1)Gripper Rail SystemPros

Use of rod contourRange of motion

ConsElement spacingAdjacent row

alignmentAlternate gripping

9

Fin Removal (Design 2)Grip Fin Rail SystemPros

Balanced forceExisting surface

areaNot cantilevered

ConsRod/Fin integrityPrecise movements

(MSM)

10

Fin Removal (Design 3)Gripping Element

EndsPros

Gripping areaEasy access

ConsRow clearanceSlippingFin binding

11

Element Removal (Design 1)Waffle MakerPros

Elements secured rigidly

Use of existing fin holes

ConsElement spacingPositioning

elements (weight)

12

Element Removal (Design 2)Fin/Element

CombinationPros

Combines processesElements held by

contourCons

Element spacingBinding

13

Element Removal (Design 3)Push PinPros

Only hold one element

Minimal binding moment

Element spacing irrelevant

ConsRemoving push pinPin alignment

Element Holder

Push Pin

14

Element Removal (Design 4)Individual Element

RemovalPros

Eliminates stepsEasy motionsCompact size

ConsClearance issuesRod end support

15

Axiomatic DesignFR 0 Remove Fuel Elements DP a Punch/Gripper/Holder

FR 1 Remove Grid Plate Pins DP a Punch rod

FR 1.1 Align on pin holes DP 1.1a Set Screw/Slider

FR 1.2 Brace for removal DP 1.2a Pneamatic clamp on hex head

FR 1.3 Push/Pull pins DP 1.3a Punch

 

1 Lever Arm

2 Threaded/Pneumatic (MS manipulator)

FR 2 Remove Grid Plate Fins DP 2a Element gripper/rail

FR 2.1 Align on fins or hex duct DP 2.1a Slider on gripper

FR 2.2 Brace for removal DP 2.2a Rail System

FR 2.3 Grip fins/elements DP 2.3a Gripper

 

1 Element contour follower

2 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 manipulation

FR 3.2 Brace for removal DP 3.2a Holder mechanism

 

1 Wafflemaker

2 Contour follower on element end

FR 3.3 Push/Pull elements DP 3.3a Slider

 

1 Fin slider using existing holes

2 Push Pin

16

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)

17

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?