1. Operating Experience Feedback Process in Korea May 30, 2006 Korea Institute of Nuclear Safety – focusing on closing the feedback loop - Kim, MinChull Operational Safety Analysis Dept. Safety Preparedness Division Korea Institute of Nuclear Safety (KINS) k400kmc@kins.re.kr

2. first KINS -1- Contents 1. Introduction 2. OEF process in Korea (Utility) 3. OEF process in Korea (Regulatory body) 4. Closing the feedback loop 5. Corrective action tracking system

3. first KINS -2- 1. Introduction Operating experience feedback process in Korea –Main elements of operating experience feedback process  Collection of operating experience  Storage, management and processing of collected information  Investigation and analysis for identifying lessons-learned  Applying identified lessons  Tracking implementation of lessons-learned –Utility : internal procedures –Regulatory body  Internal process  Periodic inspection on utility’s OEF process and implementation

4. first KINS -3- 2. OEF process in Korea (Utility) Domestic experienceAbroad experience Collection operational and maintenance experience, near miss events, etc. international organization such as WANO, INPO and Owner Groups reports Storage & management KONIS (KOrea hydro & nuclear power Nuclear Information System) Screening & analysis self-assessment procedure Applying KONIS and feedback procedure Tracking tracking and monitoring the status of implementation using the KONIS

5. first KINS -4- 3. OEF process in Korea (Regulatory body) Domestic experienceAbroad experience Collection reporting criteria –MOST notice 2005-7 Inspection findings web-site, the international organization reports, individual event reports Storage & management OPIS (Operational Performance Information System for NPPs) Inspection finding management system Screening & analysis screening criteria –provisional event rating : Level 1 or higher, –external effect, –radiological hazards, –leakage of radioactive materials, –violation of safety limits, –Rx. trip due to human error, etc. lessons-learned screening & analysis lessons-learned Applying administrative order Tracking lessons-learned management system

6. first KINS -5- 4. Closing the feedback loop Characteristics of corrective action itself –Design modification dealt or linked by other regulatory process such as a review process on modifying an individual plant’s licensing basis –Generic issues applied to the related nuclear power plants Relationship between events and corrective actions –Effectiveness of actions depends on the accuracy of analysis on the occurred event –So it is necessary to review and analyze the event considering:  the performance of the components related to the event; and  all information related to similar events occurred in the past –Proper corrective actions could prevent recurrence of similar events

7. first KINS -6- 4. Closing the feedback loop in Korea The time of closing feedback: –The time that all approved corrective actions completed in a timely manner ※ under the suppose that corrective actions identified from specific operational experience are effective to prevent recurrence of similar events → need for development of the tracking system –The system will help:  To analyze an operating experience;  To monitor the status of the implementation; and  To ensure that the approved corrective actions completed properly. ※ In addition, we are also developing the ESCORTS (Event Sequence COding and ReTrieval System) for detailed management and classification of operating experience

8. first KINS -7- 5. Corrective action tracking system Objectives –Management of the lesson-learned effectively and efficiently; –Monitoring utility’s implementation in a timely manner; and –Management of all information from the cradle to the grave.

9. first KINS -8- 5. Corrective action tracking system Standardization of work flow –Users : regulatory body, utility –Main steps  Event report : utility  Investigation and analysis : regulatory body – Utility : self investigation & analysis  Administrative order : regulatory body  Implementation of corrective actions : utility  Review a plan and/or a results of implementation : regulatory body – If correct : terminate the review – If incorrect : re-implementation and/or complementation  Verification of the results of the implementation (inspection) : regulatory body

10. first KINS -9- 5. Corrective action tracking system Main information – Reporting type  Verbal report, initial written report, detailed report –Investigation and analysis  Investigation report, collected material –Corrective action  Items, applied plants and due date  Plan and result of implementation  Results of review of the plan the results  Results of inspection for verifying appropriateness of implementation

11. first KINS -10- 5. Corrective action tracking system Development of web-based system –Log-in page

12. first KINS -11- 5. Corrective action tracking system Development of web-based system (cont’d) –Main page

13. first KINS -12- 5. Corrective action tracking system Development of web-based system (cont’d) –Reporting

14. first KINS -13- 5. Corrective action tracking system Development of web-based system (cont’d) –Investigation

15. first KINS -14- 5. Corrective action tracking system Development of web-based system (cont’d) –Corrective actions, implementation

16. first KINS -15- 5. Corrective action tracking system Development of web-based system (cont’d) –Confirmation & verification of implementation