1. MERIT Primary Containment Chamber Surface Inspection – Updated Dec 5, 2011 V. Graves MERIT EVO November 23, 2011

2. 2Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Surface Profilometer Measurements of MERIT Primary Containment Chamber Concern that high-velocity mercury beads generated during MERIT experiment might have induced pitting on the interior surface of mercury jet chamber Photography of the surfaces in Sept 2010 revealed no observable surface issues Desired to have a quantitative measurement of the surface profile around the viewports

3. 3Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Zeiss HandySurf E-35 Portable, hand-held surface tester for measuring roughness and contour Output – Read-out unit provides calculated values – Printer – Data points to Excel

4. 4Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Handysurf Specifications Traversing length:12.5mm Tracing speed:0.6mm/s Evaluation length:0.4 – 12.5mm with 0.1mm step 0.4/1.25/4/12.5mm Measuring range:40/160 μm Resolution:0.02 μm Stylus radius:5 μm Skid:Sapphire, radius 40mm

5. 5Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Surface Finish Applications Guide Various statistical parameters that Surface Profilometers support Various international standards define these parameters We’re really interested only in the raw profile data

6. 6Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Split-Hopkinson Pressure Bar used for SNS Hg Target Pitting Simulation Studies Process automated for high test cycles 1 Hz repetition rate

7. 7Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Some Control Measurements Specimens had known surface finishes prior to experiment Specimens have varying degrees of surface damage Click Image to Play Video

8. 8Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Comparative Results – Different Scales Specimen 18Specimen 14 Specimen 11 Specimen 13 Approximately 7500 pts / 8mm sample length What distinguishes a pit from other surface irregularities?

9. 9Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Additional Comparative Testing – Stainless Steel Specimens Raw stock and sandblasted specimens measured with Handysurf Sandblasted Stock Raw Stock

10. 10Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Scans Performed On/In MERIT Chamber Scans obtained around 4 viewports on right side as seen by beam – A few scans on exterior for comparison All scans 12.5mm in length (maximum)

11. 11Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Some Exterior Scans on Chamber – A Machined Surface Ra1.83Rmr6.5 Rmax20.92Rk3.24 Rz12.74Rpk0.81 RSm320.20Rvk7.45 Rq2.54Mr18.3 Rpm3.42Mr278.7 Rp4.62Vo0.0793 Rt21.68K2.3 Pc101 R01 Ra1.20Rmr18.6 Rmax18.98Rk2.22 Rz7.77Rpk0.72 RSm262.50Rvk4.75 Rq1.65Mr18.1 Rpm2.36Mr278.4 Rp4.48Vo0.0513 Rt18.98K2.14 Pc139 R02 Note the peaks of these scans are relatively flat from machining, while the valleys are deep

12. 12Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Arithmetic Mean Deviation of Profile

13. 13Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Some Random Interior Scans – A Raw Stock Surface Ra4.77Rmr7.1 Rmax28.42Rk17.59 Rz22.53Rpk1.72 RSm246.60Rvk5.44 Rq5.68Mr13.7 Rpm9.43Mr289.3 Rp12.16Vo0.029 Rt28.64K0.31 Pc117 R04 Ra4.10Rmr4.6 Rmax28.90Rk13.32 Rz20.22Rpk1.85 RSm227.20Rvk7.14 Rq4.87Mr13 Rpm8.00Mr285.8 Rp10.44Vo0.0507 Rt28.90K0.54 Pc135 R03 Both the peaks and valleys of these scans are relatively jagged

14. 14Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Interior/Exterior Comparison Ra1.83Rmr6.5 Rmax20.92Rk3.24 Rz12.74Rpk0.81 RSm320.20Rvk7.45 Rq2.54Mr18.3 Rpm3.42Mr278.7 Rp4.62Vo0.0793 Rt21.68K2.3 Pc101 R01 (Exterior Scan) Ra4.77Rmr7.1 Rmax28.42Rk17.59 Rz22.53Rpk1.72 RSm246.60Rvk5.44 Rq5.68Mr13.7 Rpm9.43Mr289.3 Rp12.16Vo0.029 Rt28.64K0.31 Pc117 R04 – Interior Scan

15. 15Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Measurement Photos

16. 16Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Viewport 2 Upstream Side Photos Taken Sept 2010 General surface appearance is uniform Jet

17. 17Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Viewport 2 Upstream Side Close-Ups Complete presentation http://www.hep.princeton.edu/~mcdonald/mumu/target/graves/graves_101310.pdf

18. 18Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Viewport 2 Scans 1-2 Ra4.31Rmr2 Rmax25.02Rk13.12 Rz21.37Rpk2.34 RSm266.30Rvk7.04 Rq5.17Mr13.7 Rpm8.68Mr282.5 Rp11.08Vo0.0617 Rt27.84K0.54 Pc108 P2_01 P2_02 Ra4.59Rmr1.9 Rmax30.62Rk14.28 Rz23.03Rpk2.61 RSm231.50Rvk7.4 Rq5.51Mr14.2 Rpm9.41Mr283.1 Rp14.16Vo0.0625 Rt31.58K0.52 Pc108

19. 19Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Viewport 2 Scans 3-4 P2_03 P2_04 Ra4.69Rmr2.3 Rmax28.84Rk15.78 Rz24.30Rpk2.38 RSm256.50Rvk6.74 Rq5.71Mr15.3 Rpm10.12Mr286.1 Rp13.64Vo0.0469 Rt32.54K0.43 Pc109 Ra4.17Rmr0.1 Rmax26.82Rk11.53 Rz21.45Rpk1.7 RSm209.80Rvk7.91 Rq5.07Mr14.8 Rpm8.22Mr279.4 Rp13.92Vo0.0817 Rt31.64K0.69 Pc118

20. 20Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Viewport 2 Scans 5-6 P2_05 P2_06 Ra3.99Rmr8.8 Rmax24.44Rk10.16 Rz19.43Rpk1.31 RSm264.70Rvk7.23 Rq4.74Mr15.1 Rpm7.12Mr276.7 Rp9.20Vo0.0842 Rt25.54K0.71 Pc110 Ra4.38Rmr4.3 Rmax31.02Rk13.68 Rz22.45Rpk2.12 RSm234.60Rvk7.79 Rq5.31Mr14.1 Rpm8.50Mr284.2 Rp12.20Vo0.0615 Rt31.10K0.57 Pc117

21. 21Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Viewport 2 Scans 7-8 P2_07 P2_08 Ra4.60Rmr0.2 Rmax35.70Rk15.6 Rz22.70Rpk4 RSm246.40Rvk5.8 Rq5.50Mr12.8 Rpm9.60Mr285.7 Rp19.40Vo0.0417 Rt35.70K0.37 Pc116 Ra4.45Rmr0.5 Rmax30.82Rk14.42 Rz22.16Rpk2.27 RSm228.60Rvk6.57 Rq5.35Mr13.6 Rpm9.09Mr283.7 Rp15.42Vo0.0534 Rt33.18K0.46 Pc112

22. 22Managed by UT-Battelle for the U.S. Department of Energy MERIT Primary Containment Inspection 23 Nov 2011 Comments SNS specimens were polished to a roughness of a few microns prior to use – a known condition – Would like to compare scans from impacted specimens with those from unused specimens No distinguishable differences between any of the interior scan profiles of MERIT chamber, whether around a viewport or not Scan patterns seem to correlate to the “mottled” surface appearance from photographs Detecting minute pits in a rough surface is practically impossible using mechanical means