Status of Technical Report on BWR IGSCC Mitigation Monitoring Results with Noble Metal Treatment Task 3.08

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1 Status of Technical Report on BWR IGSCC Mitigation Monitoring Results with Noble Metal Treatment Task 3.08 Joe Giannelli Finetech BWRVIP Mitigation Committee Meeting San Antonio, TX June 15-16, 2016

2 Purpose of Report U.S. NRC is currently reviewing BWRVIP-62 Revision 1: Technical Basis for Inspection Relief for BWR Internal Components with Hydrogen Injection ( ). HWC-M, NMCA+HWC, OLNC+HWC NRC has issued requests for additional information (RAIs). BWRs are implementing OLNC (Online NobleChem ). To support responses RAIs, a need was identified to compile and summarize available data on noble metal applications and mitigation monitoring of IGSCC mitigation in a single document. Results support responses to NRC RAIs and final BWRVIP- 62 Revision 1 report. 2

3 Report Outline: BWR IGSCC Mitigation Monitoring Results with Noble Metal Treatment Noble Metal Addition Background OLNC Laboratory Studies GE-Hitachi/GRC NORA Project Noble Metal Measurement Techniques Classic NobleChem TM Demonstration Plant Data OLNC application details, noble metal loading results, ECP Plants with only OLNC exposure Plants with NMCA exposure prior to OLNC Summary Appendix: Coupon Deposition Results 3

4 Report Status and Plan Plan Draft Report, BWR IGSCC Mitigation Monitoring Results with Noble Metal Treatment, submitted 11/25/2015 Review report to identify updates since November 2015 that can be made easily Prepare updated report for publication Data compilation and discussion, no conclusions or guidance 4

5 Coupon Deposition Easy to update Appendix listing results 584 results of noble metal deposition on coupons Results include: NMCA only, OLNC only, redistribution, and both NMCA and OLNC 134 coupons exposed to OLNC, 398 coupons exposed to only NMCA, 9 coupons exposed to LTNC and 43 redistribution coupons Several stations have allowed coupons to be exposed to multiple applications before being extracted. Most coupons were extracted from MMS skids, which draw influent from RWCU or a Recirc loop 5

6 Platinum Loading (µg/cm2) Platinum Deposition (µg/cm 2 ) Coupons Exposed to Multiple OLNC Applications Tendency for higher loadings with multiple OLNC applications Leibstadt (KKL) and Cofrentes (COF) coupons exposed to a combination of full OLNC applications and smaller mini-applications Used updated chart Full (~annual) applications KKL and COF (full and mini applications) OLNC 2 OLNC 3 OLNC 4 OLNC 5 OLNC 6 OLNC NMP2 HAT1 HAT2 BRF3 BRF1 QUA2 DRE2 DRE KKL 1 Main KKL 2 Mini KKL 1 Main, 1 Mini KKL 1 Main, 2 Mini KKL 2 Main, 3 Mini COF 1 Main COF 1 Main, 1 Mini Coupon OLNC Exposure COF 2 Main COF 4 Main, 2 Mini COF 5 Main, 4 Mini 6

7 Pt Deposition (µg/cm 2 ) Average Coupon Loading after Multiple OLNC Applications Averages and ranges of all coupons, excluding KKL and COF 0.30 Use update chart Higher loadings may be influenced by noble metal redistribution after transition from NMCA+HWC to OLNC+HWC Average Pt deposition generally increases with the number of applications (32) 2 (9) 3 (6) 4 (5) 5 (5) 6 (3) Number of OLNC (Number of Coupon Results) Range Average 7

8 Locations and Average Deposition: Artifacts and Deposit Samples 8 *Some OLNC results may include Pt from previous NMCA applications

9 LaSalle 1 Core Shroud Noble Metal Loading, from RFO15 (February 2014) Blank Corrected Sample Pt Rh Pt Rh Sample Pt Rh Total NM Total B + S Sample ID Number mg/filter mg/filter mg/filter mg/filter Area cm 2 mg/cm 2 mg/cm 2 mg/cm 2 mg/cm 2 Blank # <0.002 n/a n/a S1B S2B S2S S3S S4S S5B S5S Blank # <0.002 n/a n/a Blank Avg B+S total NM Avg mg/cm 2 Brush (loosely adherent) and stone (tightly adherent) deposits. Sample S1: Aborted, sample rig head ram released early. Samples S2 and S5: Separate brush and stone samples. S3 and S4: Only scraped, represent total noble metals. Average of totals for S2, S4 and S5 = 93% Pt Deposit predominantly loosely adherent (S2 & S5); 90 93%. 9

10 Total Deposition (µg/cm 2 ) Pt Deposition (µg/cm 2 ) LaSalle 1 Noble Metal Deposits from Shroud OD and Coupons Update with 2016 shroud results Note: 1. All analyses performed by GE unless noted otherwise Notes: 1. Only total deposition was reported for the MDS coupon of the 1st NMCA. 2. All analyses performed by GE unless noted otherwise RFO8 RFO14 RFO9 RFO10 RFO11 RFO12 RFO RFO15 7/24/98 4/19/01 1/14/04 10/10/06 7/6/09 4/1/12 12/27/14 Shroud Head Bolt Average Shroud Average Data Range NMCA MDS Coupon NMCA MMS Coupon OLNC MMS Coupon NMCA OLNC RFO Analyzed by NWT RFO9 0.1 RFO14 RFO8 RFO10 RFO11 RFO12 RFO13 RFO /24/98 4/19/01 1/14/04 10/10/06 7/6/09 4/1/12 12/27/14 Shroud Head Bolt Average Shroud Average Data Range NMCA MMS Coupon OLNC MMS Coupon NMCA OLNC RFO Analyzed by NWT 10 MMS coupon flow conditions simulate those of core shroud OD, core mid-plane. Shroud Pt loading after OLNC was significantly higher than measured on OLNC MMS coupons Pt loading of OLNC MMS coupon after: 1 app: 0.01 µg/cm 2 2 apps: 0.02 µg/cm 2 Direct sampling of the core shroud at LaSalle 2 was conducted in February Results show total noble deposition of 0.43 µg/cm 2 after 1 NMCA and 3 OLNC applications

11 Perry Surveillance Capsules (NMCA and OLNC results) Stainless steel Located close to core shroud Three capsules sampled at multiple azimuth locations (003, 177 and 183 ) Sampling program: RFO9, RFO10, RFO11, RFO12, RFO13, RFO14 and RFO15 Results from RFO12 and later are after OLNC was implemented Latest update reflects the RFO15 results 11

12 Perry Surveillance Capsules Compare Capsule 2 results with MMS coupon loading results Date (RFO) Capsule 1, 003 Capsule 2, 177 Capsule 3, 183 (µg/cm 2 ) (µg/cm 2 ) (µg/cm 2 ) Pt Rh Pt Rh Pt Rh 2/17/2001, NMCA (RFO8) 0.70 Pt, 0.19 Rh (deposition monitor outlet tubing) Between Apr-03 and Jun-03 (RFO9) Between Feb-05 and Apr-05 (RFO10) 0.64* 0.24* Between Apr-07 and May-07 (RFO11) 0.95* 0.2* 0.24** 0.04** Nov-08, OLNC Between Feb-09 and May-09 (RFO12) 0.53* 0.22* 0.67* 0.07* 9/25/2009, OLNC 9/8/2010, OLNC Between Apr-11 and Jun-11 (RFO13) * 0.07* 1/24/2012, OLNC 10/10/2012, OLNC Between Mar-13 and May-13 (RFO14) * 0.04* 11/2/2013, OLNC 7/29/2015, OLNC Between Mar-15 and Apr-15 (RFO15) 1.06* 0.04* * Capsule sampled in a previous RFO ** Same sampling location on capsule as a previous sampling Capsule 2 replaced in RFO14 12

13 Average Pt Deposition (µg/cm 2 ) Perry Surveillance Capsules Add MMS coupon loading results to chart for comparison Pt measurements show increases following OLNC applications while residual Rh deposit from NMCA has declined. Majority of the Pt removed from the surface is from the loosely adherent outer layer. RFO14 and RFO15 samples were taken 187 days and 246 days, respectively, after the last OLNC application of the cycle (durability) Note: 1. Two of three surveillance capsules sampled each outage. 0.1 RFO8 RFO9 RFO10 RFO11 RFO12 RFO13 RFO14 RFO /1/00 5/4/02 12/5/03 7/7/05 2/7/07 9/9/08 4/12/10 11/13/11 6/15/13 1/16/15 Average Pt Deposition NMCA OLNC RFO 13

14 Duane Arnold Surveillance Capsule Basket after NMCA Charts and additional discussion have been added to the report Segments from a surveillance basket in place since initial plant operation were removed shortly after NMCA completed Loading: µg/cm 2 Pt and 0.10 µg/cm 2 Rh Segments from the surveillance basket were cut and installed in higher flow and lower flow test loops for ECP measurements at VNC H2:O2 molar ratios varied between 0-20 with Zn concentration between ppb Low Flow Test High Flow Test 14 Ref: BWRVIP-43: BWR Vessel and Internals Project, In-Plant Demonstration of Noble Metal Chemical Addition at Duane Arnold Energy Center, EPRI, Palo Alto, CA TR

15 In-Process ECP Response to OLNC 15

16 Plant ECP Monitoring Locations 16

17 ECP mv(she) Leibstadt (BWR-6) RRS ECP Include updated trend chart /9/08 11/8/09 1/7/11 3/7/12 5/6/13 7/5/14 9/3/15 ECP (Recirc) OLNC mini OLNC Mini-OLNC injections ECP shows a rapid decease from each injection followed by a gradual increase until the next application 17

18 ECP (mv SHE) Nine Mile Point 1 (BWR-2) RRS ECP Include updated trend chart /10/06 1/3/08 3/28/09 6/21/10 9/14/11 12/7/12 3/2/14 5/26/15 Avg Pt1 & Pt2 OLNC ECP rapidly decreases after each annual OLNC and then gradually increases until the next application. 18

19 Nine Mile Point 2 (BWR-5) RRS ECP Not currently included in report; suggest adding RRS flange ECP installed in April 2014 Results show a pronounced decrease to ~-575 mv(she) after OLNC Step increase in Feb-2015 following reactor scram, but still low 19

20 ECP [mv(she)] OLNC Brunswick 1 (BWR-4) Lower Plenum LPRM ECP, 1 st OLNC /21/14 6/10/14 6/30/14 7/20/14 8/9/14 8/29/14 9/18/14 10/8/14 Pt1-SS Pt2-SS Milestone Rapid decrease in ECP after OLNC, gradual increase 20

21 ECP, mv(she) Brunswick 1 (BWR-4) Lower Plenum LPRM ECP, 2 nd OLNC Include updated trend chart 2 nd OLNC July 24, 2015 ECP lowered from ~- 380 mv(she) to ~-490 mv(she) Gradual increase in ECP as after 1 st OLNC application (mid-cycle outage) ECP >-350 mv(she) after RFO Hydrogen increased to reduce ECP to ~-380 mv(she) until 3 rd OLNC application -250 HWC-M /1/ /17/2014 6/5/ /22/2015 7/9/2016 Pt-1 Pt-2 OLNC Mid-Cycle Outage Refuel Outage 21

22 ECP mv(she) Brunswick 2 Lower Plenum LPRM ECP after OLNC Not currently included in report; suggest adding /20/15 8/9/15 9/28/15 11/17/15 1/6/16 2/25/16 4/15/16 RCI ECP OLNC ECP values stable near -440 mv(she) since 1 st OLNC application. 22

23 ECP mv(she) ECP Flange Replacement ECP mv(she) ECP Flange Replacement Hatch 1 & Hatch 2 (BWR-4s) BHDL ECP Include updated trend charts -200 HAT /28/05 6/17/07 7/6/09 7/26/11 8/14/13 9/3/15 MMS ECP BHDL(Pt-3) NMCA OLNC ECP Flange Replacement /26/11 5/21/12 3/17/13 1/11/14 11/7/14 9/3/15 MMS Pt ECP OLNC HAT2 BHDL(Pt2) ECP ECP Flange Replacement Values biased low by ~30 mv(she) until April 2013 due to an error in plant calculation ECP flange replacements during the most recent outages at each unit BHDL ECP and MMS ECP show similar results ECP remains low with only a gradual and small increase between applications 23

24 Report Plan and Schedule Make identified easy updates to the draft report. Data compilation and discussion, no conclusions or guidance. Prepare updated report for publication Submit updated report to EPRI for publication: July 2016 Reviews required? Report can be updated again later, as needed, as more data become available 24

25 Together Shaping the Future of Electricity 25