1. CHLE Update STP October Team Lead Meeting 11/29/2012 Janet Leavitt, Ph.D. 1

2. Overview T2 LBLOCA Results Bench Top Experiments NRC Call 2

3. Corrosion/precipitation scenario

4. T2 LBLOCA Objective – Determine the mass of aluminum corrosion – Evaluate possible effects of key corrosion and dissolution materials on head loss Conditions – 15” Temperature profile – 6.5 hr spray – Standard Chemistry Boric Acid, LiOH, TSP, HCL, HNO 3 – Multiple Materials Submerged zinc granules determined from 371 lbs of paint chips Vapor and submerged STP aluminum scaffolding (90%/10%) Submerged Fiber glass – columns and tank (41%/59%) Submerged concrete 4

5. T2 LBLOCA Preliminary Results SEM – Membranes – Scale – Coupons ICP Analysis of Scale XRD XPS 5 Temperature Profile Approach Velocity Differential Pressure pH Turbidity Select metal concentrations

6. Temperature Profile 6

7. Velocity 7

8. Temperature Corrected Dp 8

9. pH 9

10. Turbidity 10

11. Measured Aluminum 11

12. Measured Calcium 12

13. Measured Silicon 13

14. Measured Zinc 14

15. CHLE Tank

16. CHLE Head Loss Columns

17. Debris beds in head loss columns Blender bed vs. NEI bed

18. Vapor Space Materials 18 Pre-test Post-test

19. Submerged Materials Pre-test 19 Pre-test Post-test

20. Inside the Mesh 20

21. Submerged Material 21 Pre-test Post-test

22. Scale 22

23. ICET Test 2 23

24. Post-test Tank Solution 24

25. SEM of Scale 25 ElementAtomic % O56.3 P18.6 Zn25.1

26. Digested Scale ICP-OES Results Metalmg/Kg % Aluminum1800.04 Calcium10000.21 Silicon1000.02 Zinc480,00099.73 26

27. XRD of Scale Crystalline Mixture – Main phase – Zn 3 (PO 4 ) 2 ●4H 2 O (Hopeite) – Trace phase – CaAl 2 Si 7 O18 ● 6H 2 O (Heulandite) 27

28. Scale on Submerged Al Preliminary SEM results – Similar to constituents of MBLOCA scale Aluminum and oxygen Aluminum, phosphorous, and oxygen Exception; trace amounts of zinc detected – Possibly more scale 28 MBLOCA LBLOCA

29. Awaiting…. Post-test analysis of bed XPS Results – Another confirmation of scale constituents – Provides stoichiometric formula 29

30. Post-test beds 30

31. SEM 31 Elem entElement %Atomic % O7.324.2 Zn92.775.8

32. Zinc Material 32

33. SEM ElementAtomic % O73.7 P11.4 Ca3.9 Zn10.9 33 ElementAtomic % O56.3 P18.6 Zn25.1 ScaleCaptured Particle

34. SEM 34

35. SEM 35

36. T2 Observations Visible chemical product were detected Measured aluminum concentrations are ~1/3 of that detected in T1 The filtered concentrations of zinc, aluminum and calcium maybe lower than the total concentration Membrane filters appears to capture more debris as compared to T1 Turbidity has decreased to the lowest levels observed during the testing series NEI beds in C2 and C3 measure head loss due to solution constituents Chemical products may mainly be a zinc phosphate with trace amounts of aluminum and/or calcium products 36

37. Bench Top Experiments Batch Corrosion test – Three temperatures (85, 60, 35 o C) – Three solution pH values (6.0, 7.2, 7.7) – Two time frames (24 hours and 30 days) – Aluminum only, aluminum and silicon, zinc only Batch Dissolution/leaching test – Fiberglass dissolution in the presence of soluble aluminum Three temperatures, pH values and two time frames – Concrete leaching test for UNM and Southern concrete samples Path forward – Test plan will be re-visited after evaluation of current test result – More bench test for corrosion focused on zinc and aluminum materials – Another integrated tank test with blender bed 37

38. NRC Call Kerry to discuss UNM position UNM’s position is supported by four test Basis for Conclusion – The release of corroded aluminum into solution is much less than predicted – Precipitation in the bulk solution is not likely to have occurred – If precipitates were to form, they would be unlikely to cause a significant increase in head loss Conclusion – Chemical precipitates are expected to have no effect on the ECCS strainers at the STP plant for all LOCAs smaller than a 6- inch break Likely valid for breaks up to 15 inches 38

39. Questions? 39

40. Series 100: Leaching (concrete, debris) Series 200: Al corrosion T> 85 C Lab Tests Series 2000 -3000: Corrosion Test Max 30 day and initial release, variability Series 4000: Precipitation test Identification, characterization, variability 30 Day Tank Tests Test 3: SBLOCA Test 2: LBLOCA Test 1 : Shake down Test 4: MBLOCA Short Term Tank Test Test 1: Bed thickness to particulate Ratio 1 Test 2: Bed thickness to particulate Ratio 2 Test 2: Bed thickness to particulate Ratio 3 CASA Thermodynamic Modeling Precipitate calculatorHead Loss Calculator

41. Streamline CFD Calculation NE View Slide 41

42. Velocity Magnitude and Unit Vector CFD Calculation NE View Slide 42