1. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 AGING BENCHMARKING

2. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 TEAM MEMBERS Luis Yague Cofrentes N. P.P. Mike Ballard WANO-London Fernando Mirallas Ascó & Vandellos N. P. P. Cedric Stappaerts GDF-SUEZ Esko Luukkonen Loviisa N.P. P. (Fortum) Emanuele Zampini Slovenske Elektrarne (ENEL) Nuboyuki Tagashira EPCO (JANSI) Paul Thomas EDF- Energy Luboslav Jasovsky Slovenske Elektrarne Patrick Ryckaert Electrabel Vladimir Vebr Cez Vladimir Ondrejka Slovenske Elektrarne Rober Comby EDF Dam Philipps First Energy Angel Benito (Chairperson) Almaraz & Trillo N. P. P.

3. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015  PROCESS DESCRIPTION  REACTOR VESSEL RESULTS  CABLES RESULTS  BURIED AND UNBURIED PIPES RESULTS  HEAT EXCHANGERS RESULTS  ELECTRICAL MOTORS RESULTS  NEXT STEPS

4. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 PROCESS DESCRIPTION  Selection of the 5 most relevant equipment  Preparation of questionnaire  Reception of answers  Evaluation of answers  Issue of the report PROCESS DESCRIPTION

5. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 TOP 5  REACTOR VESSEL  CABLES  BURIED AND UNBURIED PIPES  HEAT EXCGHANGERS  ELECTRICAL MOTORS PROCESS DESCRIPTION

6. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 QUESTIONNAIRE  One questionnaire for every type of equipment  Question focus in:  Inspection criteria  Inspection results PROCESS DESCRIPTION

7. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 ANSWERS RECEIVED  7 companies; more than 9 Nuclear Power Plants; more than 28 reactors  Six Countries (Slovakia; Belgium; Finland; Slovenia; Japan and Spain)  Three different technologies (VVER; PWR Framatome & Westinghouse and BWR General Electric)  As a results of participate different countries with different regulatory criteria and use different technologies the answers received are not so homogeneous.  Some answers require some clarification a new questions  However interesting information and conclusion could be achieve. PROCESS DESCRIPTION

8. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 PRELIMINARY ANALYSIS The analysis is based in:  Identify different between plants, countries and technologies.  Identified good practices usefull for other plants

9. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 REACTOR VESSEL RESULTS (Nobuyuki & Angel)  All plants use specimens for measuring the irradiation and brittleness. Spanish and Slovenia plants additionally are using external dosimetry.  Belgium, Spanish and Slovenia use ASME code to analyze specimen, Japan use a code similar to ASME, Slovakia Plants use criteria agree with IAEA.  The plant Westinghouse design are involved in the baffle bolts inspection. One plant has discovered cracks in the baffle bolts.  The Westinghouse plants have had problems with split pins in fact split pins have been replaced in some plants.  All plants have inspection programme for the head weld penetration, one plant needed take actions.  None plants has problems with the bottom weld penetration.  Spanish; Belgium, Slovenia Japanese plants inspect thimbles all plants have wear problems.

10. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 ELECTRICAL CABLES RESULTS (Vladimir & Vladimir)  Every company has a cable inspection/testing programs.  All companies have own programme based on similar methodologies and approach (mostly NUREG, GALL, IAEA).  There are differences of scoping of inspection/testing cables. Good practice for cables scoping : * safety important, * real environmental condition, * type of cable insulation, * voltage levels (power: HV, LV; I&C)  Most of companies use EPRI Guidelines  All companies monitor environmental condition, but by different way (for example only hot spot, etc.)

11. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 ELECTRICAL CABLES RESULTS (Vladimir & Vladimir)  Good practice for type of inspection test : * walkdowns, * electrical measuring real cables (Insulation resistant, capacitance and tgd, TDR... ) * mechanical test of tensile (elasticity) of cables deposit samples, * voltage levels (power: HV, LV; I&C)  Testing period is between 1-6 years,  Degradation signs are very similar : decoloration, cracking, elasticity changes, insulation resistance reduction,

12. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 BURIED AND UNBURIED PIPES RESULTS (Robert) The information received required a lot of qualifications

13. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 HEAT EXCHANGERS RESULTS (Mike)  Heat Exchanger Programmes – All had a programme to address ageing. Slovakia has maintenance templates for HXs  GALL and OE was used as an input for HX programmes (Slovakia and Spain)  Degradation mechanisms – Condenser with Brass tubes have under deposit, surface, and flow induced corrosion (Slovakia)  Degradation mechanisms – Fouling, tube fouling (Spain, Tepco)  Degradation mechanisms – wear, impingement, loose parts (Slovenia)  Tube Leaks (Tepco)  When ECT is not possible – use of tracer gas (Spain-Almaraz)  Stations not using ECT on HX – Spain (Asco, Vandellos), Slovakia  When ECT is not possible, tubes are replaced Japan (Tepco)

14. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 ELECTRICAL MOTORS RESULTS (Esko)  Every plant has inspection and testing programme  All programmes based on EPRI guides except Loviisa & Asco- vandellos  Everybody do very similar tests and inspections  All plants do trend analyses to identify sings of aging  Almost everybody have renewal and refurbishment programs  All have similar criteria based on Failure rate, condition assessment, test results etc. Only difference is that in Japan (TEPCO) will replace most of motors every 20 years at least.

15. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 NEXT STEPS For achieving a more useful benchmarking we need:  More replies.  Some clarifications about some answers We are waiting your reply.

16. AGING AND OBSOLESCENCE SUBCOMMITTEE Bratislava 14 & 15 of April of 2015 NEXT STEPS All Community members:  Before 30.06.15. Send us questionnaire answers Answer to new questions and clarifications Team members:  Before 15.05.15: Will request new answers and clarifications  Before 15.09.15: Survey other aging management organizations´ activities and identify core values of this group.  Before the September meeting: Create progress report.  September meeting: Discussion about benchmarking and core values.  April of 2016: Create draft report if the team identifies core values.