Coordinated Research Project(CRP) - Qualification, Condition Monitoring, and Aging Management of Low Voltage Cables in NPPs

Transcription

1 Coordinated Research Project(CRP) - Qualification, Condition Monitoring, and Aging Management of Low Voltage Cables in NPPs 1 August 2011 Ki Sig Kang International Atomic Energy Agency

2 What is Coordinated Research Project? Encourage and assist research and development and practical application of atomic energy for peaceful purposes Foster the exchange of scientific and technical information Developed MSs Developing MSs 2

3 Objectives of CRP Development of qualification procedure for new cables Monitoring method for operation Npps Ageing management programme from Benchmark results Two major intended outputs Guidelines for qualification Data base from cables prosperities and benchmark results How we are achieving success NPES 3

4 Leading Remarks Continuous efforts started with TECDOC (In-containment Instrumentation and Control Cables Vol.I/II, 2000) and New NES series - NP-T-3.6 to be published in Collect / share research results and data from Benchmarking Programme started in 2011 and continuing until

5 Comparison between RP & CRP Draft NES CSI 1 Agreement or Contract CSI 6 CSI 2 Extended NES RCM (1~3) CSI 5 CSI 3 Final NES CSI 4 NES : Nuclear Energy Series CSI : Chief Scientific Investigator NPES 5 RCM : Research Coordinated Meeting

6 Comparison between RP and CRP Items Normal Programme Coordinated Research Project Objective Ad-hoc or emerging issues One specific topic Meeting Approach 2 ~ 3 times consultancy meeting to prepare draft or extended material A technical meeting Prepare draft material and review the prepared material Research topic, benchmark, round robin test, D/B Broad range topics 3 time research coordinated meetings (RCMs) At least one year interval 2 times small group meetings to prepare docs. Report research progress Share the research results Duration 3 years programme 3 ~ 5 years programme 6

7 Comparison between NP and CRP Items Normal Programme Coordinated Research Project Invitation Technical competence Personnel basis Output Relation 4~ 6 experts Technical guidelines (TECDOC, TRS, NE series reports) + appendices (country reports) No relation with national or company research programme National Research programme 10~15 research organizations (Developed and developing MSs) Contract or Agreement Open doc : Technical guidelines (final results) Closed docs : Database, benchmarking results, progress reports Combined with national or company programme How we are achieving success NPES 7

8 Reactor Pressure Vessel Integrity under Irradiation Damage Testing Irradiation damage challenge Model Matrix damage Core weld How we are achieving success NPES 8

9 CRP History on RPV Structural Integrity Phase 1 : Irradiation Embrittlement of RPV Steels (1975): 9 Org. from 8 MS. Phase 2 : Analysis of the Behavior of RPV Steels under Neutron Irradiation (1986) : 10 Org from 9 MS. Phase 3 : Optimizing RPV Surveillance Programmes and Analyses (2001) 24 Org from 18 MS. Phase 4 : Assuring Structural Integrity of RPV (2002) : 24 Org. from 19 MS. Phase 5 : Surveillance Programme Results Application to RPV Integrity Assessment ( ) : 24 Org. from 15 MS. How we are achieving success NPES 9

10 CRP History on RPV Structural integrity Phase 6 : Mechanism of Ni effect on radiation embrittlement of RPV materials ( ), 11 Org. from 10 MS Phase 7 : Evaluation of Radiation damage on WWER-440 RPV materials using DB ( ), 8 Org. from 7 MS Phase 8 : Master Curve Approach to monitor the Fracture Toughness of RPV ( ), 15 Org. from 11 MS Phase 9 : Review and Benchmark of calculation methods for structural integrity assessment of RPVs during PTS ( ), 10 Org. from 10 MS More than 120 research organizations from 20 countries since 1975 How we are achieving success NPES 10

11 Reference Material for Benchmarking Large sample of 25 ton steel manufactured Kawasaki Steel Corporation. Cutting diagram of test block with 1 M* 1M 150 mm* 150 mm test plate Chemical composition Tensile properties Impact properties Fracture properties Comparatively homogenous and can used as reference steel

12 Database on Int. RPV materials

13 Structure of RPV Main Base Database NO Table Comment 1 RPV_CV Charpy V Impact Testing results 30 RPV_DFR Dynamic fracture toughness testing results 65 RPV_DIA Illustrative diagramms collection 89 RPV_EXP Exponential curve collection 111 RPV_GEN General information and address of the contributor, material supplier, rpv manufacturer 135 RPV_HRD Hardness testing results 165 RPV_IRR Description of the irradiation conditions 204 RPV_MAT Material catalog and chemistry composition 249 RPV_MET Metyallography images collection 266 RPV_PIC Illustrative picturess collection 279 RPV_REF References on the contributor reports 290 RPV_REL References on the open reports 301 RPV_SFR Static fracture toughness testing results 338 RPV_TEC Production technology of the base material 385 RPV_TEN Tensile testing results 418 RPV_THR Description of the termal ageing conditions 438 RPV_TT Transition temperatures and tangeht hyperbolic coefficients 473 RPV_UTIL Identification of the utility which is the donor of the data 488 RPV_WEL Welding technology information

14 NO Table Field Format Unit Comment 1 RPV_CV Charpy V Impact Testing results 2 RPV_CV _MCODE Char(12) - the specimen identification code will be given randomly by the. 3 RPV_CV _NUM Char(3) - specimen number 4 RPV_CV STAND_NAME Char(15) - standard material designation( e.g. SA533 Grade B) used to identify product type. 5 RPV_CV THICKNESS Numeric mm the thickness of the material from where the specimen was cut in [mm] 6 RPV_CV DEPTH Numeric mm the distance between the nearest surface of the material and the middle of the specimen in [mm] 7 RPV_CV ORIENT Char(6) - the specimen orientation according ASTM A RPV_CV FLUENC1MEV Numeric n/m2 the average specimen fluence E> 1MeV in 10**22 [n/m2] units 9 RPV_CV IRRAD_TEMP Numeric C the average temperature of the capsule during irradiation in [ C]. 10 RPV_CV SPEC_TYP Char(2) - Type of the impact specimen CVN; Type B; Type C, or Izod according ASTM E RPV_CV TEST_TEMP Numeric C testing temperature in [ C] 12 RPV_CV KV Numeric J the energy absorbed by the failure of a Charpy V notched specimen in [J] 13 RPV_CV LAT_EXP Numeric mm the lateral expansion of a standard Charpy V notched specimen [mm] according to ASTM E RPV_CV FRAC_APP Numeric % the percentage of shear fracture surface according to ASTM-E 23 [%] 15 RPV_CV QUAL_CV Char(6) - Charpy impact testing reliability (high, medium, low) according to the judgement of the testing laboratory 16 RPV_CV TUP_TYPE Char(12) - type of tup used: ISO or ASTM 17 RPV_CV MAX_VELOC Numeric m/sec velocity of the hammer just before touching the specimen in [m/sec] 18 RPV_CV CAPACITY Numeric J capacity of the impact machine in [J] 19 RPV_CV INSTRUM Char(20) - short description of extra instrumentation used during the testing, if any. 20 RPV_CV DIAG_CODE Char(15) - code which identifies the enclosed instrumented impact testing diagram (if any) 21 RPV_CV CONTR_CODE Char(5) - *any identification. given by the contributor 22 RPV_CV SPECIMCODE Char(8) - *specimen identification 23 RPV_CV REMARK_CV Char(30) - *any remark on impact testing 24 RPV_CV REF Char(12) - *the reference code of the contributor report given by 25 RPV_CV PAGE Char(8) - *the page of the referenced report where the data can be found (or the number of the spreadsheet e.g. Table x.) 26 RPV_CV DATE Date - *the date of the contributor s report 27 RPV_CV MODIF_DATE Date - *the modification reference code of the contributor report given by 28 RPV_CV MODIF_REF Char(12) - *the page of the referenced modification report where the data can be found 29 RPV_CV MODIF_PAGE Char(8) - *the date of the last modification of the record

15 Main relationships of developed software Raw, qualified and processed materials data are stored in the database separately; Raw, qualified, processed data obtained from test reactors and power reactors are stored separately;

16 Section 3 Section 4 Section 5 Section 6 Section 7 Section 8 Type and number of SM fracture mechanics specimens Test using ASTM E1921 to obtain T o and s To (and other fracture parameters) Guidelines for Implementation of MC Adjust for small number, combination or type, censoring, or abnormal data Obtain best estimate of o T for SM Ratio or other material heat adjustment, plus homogeneity non- s H ) (including ( throughthickness) T Best estimate of o for T Material RPV Bias adjustment or other constraint adjustment Is SM irradiated? No Use D T o vs D T 41J D ( T k ) correlation; need s corr, s D and s i Yes Fluence funciton to allow projection ( s f t ) and attenuatio n Application-defined size, flaw flaw type, and stress state Deterministic Application Probabilistic Application Use ASME Code Curves and To (Code RT Case N- 629) Margin based on uncertainties, define Y and x (if necessary) Use Master with x% bound Curve lower Other considering approaches shape change, etc... Perform Use best estimate o as function T of f t, Master statistical distribution, Curve and other uncertainties

17 WWER Reactor, variation of hoop stress through the wall thickness Hoop stress [MPa] WWER 440, variation of hoop stress through the wall thickness NRI 1200 NRI 2400 NRI 3600 NRI 3895 FNS 1200 FNS 2400 FNS 3600 FNS AREVA 1200 AREVA 2400 AREVA 3600 AREVA OKB 1200 OKB 2400 OKB 3600 OKB 3895 VUJE 1200 VUJE 2400 VUJE 3600 VUJE Depth [mm] How we are achieving success NPES 17

18 PWR Max of K1 KI [MPa.m 1/2 ] PWR, first maximum of K I NRI SNERDI AREVA OKB KOR_P1 KOR_P2 KOR_P3 KOR_P4 KOR_P5 KOR_P6 KOR_P7 Comparison of Research Results Sensitivity study Find root cause Minimize human effects Develop test procedure for benchmark cal. near interface point How we are achieving success deepest point NPES 18

19 CRP 8 and CRP 9 Final Results How we are achieving success NPES 19

20 Benchmarking Cycle Planning Cable collections from Vendors and Npps Develop test procedure Data collection Preliminary assessment Qualification of data Selection of Best Class Assessment Development of monitoring and ageing procedure Recalibration of procedure through retest 20

21 Web site during CRP implementation How we are achieving success NPES 21

22 Fast Report Customization How we are achieving success NPES 22

23 Structure of CRP Documents Cable CRP Open Document CRP Members Main Text (75 p) Appendices ( 50 p) Main text Reference Docs. Main text + App Doc. Data base * Benchmark Results 1-3 RCM Presentations. EC, Others NRC IEC, etc How we are achieving success NPES 23

24 Bad Experience on CRP Could not continue RCM Not research progress after first RCM Too general technical information Not focus on CRP topics Change of Chief Scientific Investigator Lack of Leadership of Group leaders, Chairperson, secretary Not issued an official documents Working material 24

25 Recommendations Prepare detailed Chief Scientific working Investigators matrix Contributions to develop work plan and keep Group Leader commitments (1~ 3) Close cooperation during CRP duration Human networks Chairman Early start to fix table of contents and assign to test & write Technical reports from organizations Cooperation Main Chapters Coordination Group leaders (compile all information and analysis) Progress Chief report Scientific : Each Investigators CSI Researchers How we are achieving success NPES 25

26 Questions?? How can CRP members will develop cable qualification procedure or guidelines? Data on cable type, manufacturer, and physical characteristics of low voltage cables Selection of Npps : PWR, BWR, Candu and VVER Data request format Cable samples for benchmark experiments Who will provide sample cables (new and used cable) Who will machine and send cables to CRP members Test procedures(apply national test procedure or identical procedure (who develop test procedure?) Comparison approaches if the results are big differences How we are achieving success NPES 26

27 Responsibilities How we are achieving success NPES 27

28 Benchmark Benefits Provides realistic and achievable data Creates an atmosphere conducive to continuous improvement Challenges operational complacency Creates a sense of urgency for improvement Helps to identify weak areas and indicates what needs to be done to improve How we are achieving success NPES 28

29 Transfer of the data to database Following Considerations are important with regard to data transfer: 1. Development of an official agreement on transfer and use of the data to between and CRP members 2. Confidentiality of the data. Agreement of the content of transferred data 3. Transfer the data from CRP member Only authorized persons are allowed to transfer data to the database 4. Changes and replacement of the data stored in database can be done only by the CPR members after preliminary approval by the database supervisor. How we are achieving success NPES 29