1. July 11-13, 2005 Chan-Hee Cho Korea Electric Power Research Institute Data Analysis Performance Demonstration in Korea

2. 2 1 1 Background Outline 2 2 Overview of Steam Generators in Korea 3 3 Performance Demonstration 4 4 KEPRI NDE Center Summary 5 5

3. 3 Background Requirements for the performance of SG tubing analysts  QDA was not mandatory.  SSPD was not implemented.  KEPRI had been preparing PD for the SG tubing analysts. Secondary : only 20% of collected data (2002) SG Tube Rupture in Ulchin Unit 4(2002. 4)  SG2 R14C38(1RF03)  Long bulge indication (length: about 75mm from TSH) Increased social concerns on the safety of NPPs Before 2004

4. 4 Background (cont.) Increase of Inspection Scope  Bobbin: 100%  MRPC (H/L TTS): 100%  MRPC (C/L TTS): 20% Reinforcement of Plugging Criteria for OPR1000 Model  Wear ≥ 30% for tubes around stay cylinder  Wear ≥ 36% for all other tubes Revision of Notice on the ISI by MOST

5. 5 Background (cont.) Secondary shall analyze 100% of collected data. QDA Requirement Requirement for the Implementation of SSPD Program Revision of Notice on the ISI by MOST

6. 6 Overview of Steam Generators Kori: 4 Units  W-delta 60: 1, W-F: 3 Yonggwang: 6 Units  W-F: 2, OPR1000: 4 Ulchin: 6 Units  FRAM-51B: 2, OPR1000: 4 Wolsong: 4 Units  F/W(CANDU): 1, B&W(CANDU): 3 B&W(CANDU): 3 Operating Steam Generators in Korea Ulchin #1,#2,#3,#4, #5,#6 Wolsong #1,#2,#3,#4 Kori #1,#2,#3,#4 Yonggwang #1,#2,#3,#4, #5, #6 KEPRI

7. 7 Performance Demonstration KEPRI has prepared Performance Demonstration programs since 2001. programs since 2001. Introduced QDA package and SSPD software from EPRI. Has collected eddy current data from all sites for the SSPD database. database. Performance demonstration program in Korea has been implemented since July 1, 2004. implemented since July 1, 2004. Performance Demonstration Program in Korea

8. 8 Performance Demonstration KEPRI NDE Center is Operating QDA Program in accordance with Appendix G of EPRI Guidelines: Rev.6 QDA Program in Korea Applicants for QDA Test (by June 2005) Qualification29 Re-qualification5

9. 9 Performance Demonstration 5 Categories for the SSPD Test Yearly-Based & Category-Based Rule for SSPD Test  For the same category and the same calendar year, the examination can be exempted. the examination can be exempted. SSPD Program in Korea

10. 10 Performance Demonstration (cont.) The following rules are applied:  A score of 80% is required to pass.  A time limit of 2 hours is allowed for the test.  In the event that an 80% score is not achieved, additional training and re-examination will be required. training and re-examination will be required.  In the event that an 80% score is not achieved on the re-examination, the individual will not be allowed to analyze re-examination, the individual will not be allowed to analyze data at that plant during that outage. data at that plant during that outage. SSPD Program – Written Examination

11. 11 Performance Demonstration (cont.) The following rules are applied:  A score of 80% minimum is required to pass.  Only two attempts are permitted.  All missed indications shall be reviewed with the examinee.  If the examinee fails the first demonstration, additional one on one training by the Level Ⅲ shall be performed on missed indications training by the Level Ⅲ shall be performed on missed indications and any general area deemed necessary by the Level Ⅲ. and any general area deemed necessary by the Level Ⅲ. SSPD Program – Practical Examination

12. 12 Performance Demonstration (cont.) SSPD Program – Practical Examination (Scoring Scheme) INDICATION CATEGORY ACTUAL %TW NOT CALLED SIZING ERROR MISMATCHED CODE LOCATION ERROR TW INDICATION 40-100%-10NA 20-39%-5NA <20%-2NA SAI,MAI,SCI,MCIALL-10NA-5 OTHER 3-L CODES ALL-2NA ORIENTATIONALLNA -2NA FALSE CALL-1 per 10 false calls

13. 13 Performance Demonstration (cont.) SSPD Program - Examinees Examinees for SSPD in Korea (by June 2005) Steam Generator TypeExaminees W-delta 6030 W-F48 Framatome29 OPR100085 CANDU32 TOTAL224

14. 14 Performance Demonstration (cont.) To develop SSPD procedures and database for the sizing analysts Plan to obtain more data from destructive examination SSPD – Further Work Plan

15. 15 KEPRI NDE Center Development & Implementation of NDE Solutions to Promote Safety and Reliability of NPPs

16. 16 KEPRI NDE Center (cont.) Research Projects  Development of NDE System for BOP Heat Exchanger Tubes  Development of Diagnostic Techniques for RCCA by NDE  Development of UT Technique for LP Turbine Technical Supports for Utilities’ Requests  NDE for Main Components of Nuclear Power Plants  ECT for Various Heat Exchangers  Safety Assessment for the Foreign Objects outside SG tubing NDE Personnel Training & Qualification Work Areas

17. 17 KEPRI NDE Center (cont.) SG Mock-up for ECT & Hands-on Training for UT

18. 18 KEPRI NDE Center (cont.) K-PD Program  Co-work with EPRI  Established Performance Demonstration Programs for UT and ECT for UT and ECT Steam Generator Management Program(SGMP)  KEPRI is a member of EPRI SGMP.  SGMP in Korea was implemented in 2005. Retired Steam Generator Project  Kori Unit 1 steam generators were replaced in 1998.  Old steam generators have many types of degradation.  Study on these degradations. On-going Projects

19. 19 Summary Reinforcement of requirements for SG tubing inspection  Increase of Inspection Scope  Strengthening of Plugging Criteria  Implementation of Performance Demonstration Programs Established performance demonstration programs Plan to develop SSPD procedures and database for sizing analysts analysts Plan to obtain more data from destructive examination of pulled tubes pulled tubes Summary and Further Work