UPDATE ON INDUSTRY EMC STANDARDS AND IAEA RESEARCH FOR CABLE AGING MANAGEMENT

Transcription

1 A M UPDATE ON INDUSTRY EMC STANDARDS AND IAEA RESEARCH FOR CABLE AGING MANAGEMENT PRESENTED BY: Chad Kiger EMC Engineering Manager AMS Corporation S PRESENTED TO: 26 TH ANNUAL EQ TECHNICAL MEETING Clearwater Beach, Florida Wednesday, November 12 th, 2014 Chad Kiger 2014 Analysis and Measurement Services Contact Us AMS Technology Center, 9119 Cross Park Drive, Knoxville, TN USA P / info@ams-corp.com

2 Presentation Outline Slide 2 of 18 Industry EMC Standards EPRI TR Revision 4 released in December 2014 Start of the update to NRC Regulatory Guide (Revision 2) Revision to IEC IEEE has considered an EMC standard IAEA Cable Aging Management Research Establish qualification methods for new cables Qualify condition monitoring methods for aging management and fault finding Create a database/website of cable properties and characteristics

3 EPRI TR Rev 4 encompasses updates for newer plant EMC conditions Slide 3 of 18 Guidelines for Electromagnetic Interference Testing of Power Plant Equipment Released in December 2013 NRC is expected to review Updates/Changes Clarification of tests methods/limits Only limit changes were for RE101/CS114 Addition of wireless considerations ESD is now evaluate instead of optional Addresses modular testing Reviewed IEC (standard not endorsed) Recommended grounding and connector practices Endorses latest revision of test standards

4 Efforts have begun to update NRC Regulatory Guide Slide 4 of 18 Guidelines for Evaluating Electromagnetic and Radio-Frequency Interference in Safety-Related Instrumentation and Control Systems Anticipated Release in 2017 Will address areas of concern such as CS114 May involve site measurements and/or cooperation with the industry to determine the plant s electromagnetic environment

5 IEC is currently going through its first revision Slide 5 of 18 Nuclear Power Plants Instrumentation and control important to safety Requirements for electromagnetic compatibility testing Original Release in 2009 Anticipated Update Release is 2018 Will be expanded to address new technologies such as wireless and variable frequency drives May encompass electrical systems in addition to I&C systems

6 Several IEEE activities in the EMC arena Slide 6 of 18 IEEE may look into generating a nuclear specific EMC standard Similar to the EPRI/NRC guide Guidance for the use of Military standards Complement to IEC IEEE Std 473 is currently in the beginning stages of resurrection Standard for EME site surveys Not a nuclear-specific standard Originally released in 1985 Was withdrawn in the 2005 timeframe

7 IAEA Research Activities Coordinated Research Project (CRP) Objectives Slide 7 of 18 Acquire representative NPP cables and measure their baseline properties Age the cables and repeat the measurements Use the results to: Establish qualification methods for new cables Qualify condition monitoring methods for aging management and fault finding Create a database/website of cable properties and characteristics Identify areas of future research

8 Slide 8 of 18 Current U.S. Practice for Cable Aging Management Risk Rank the Cables Environmental Assessment Perform Walk Down Perform In-Situ Tests

9 CRP Timeline Slide 9 of 18 Informal Meeting at AMS (Aug 2011) Official Meeting at IAEA (April 2012) Official Meeting at AMS (July 2013) Official Meeting at SNERDI (Oct 2014) Original Proposal at IAEA (Feb 2011) Final Meeting at IAEA (2015)

10 CRP Report Slide 10 of 18 COMPLETED (70%) REMAINING (30%) Introduction Fundamentals of cable systems Condition monitoring techniques Baseline test results Cable acceptance criteria Related R&D Related standards Appendix: Details of benchmark work Final test results Regulatory aspects of cable aging management and condition monitoring Validation of cable condition monitoring techniques Country practices Conclusions and Recommendations

11 Aging of Samples for CRP Benchmark Slide 11 of 18 Thermal Radiation Thermal-Radiation Thermal (AMS and others) Irradiation Cell (AECL) Irradiation Thermobox (UJV)

12 Thermal Aging Time and Temperatures for AMS Tests Slide 12 of 18 MATERIAL AGING TIMES CSPE 120 C SiR 190 C PEEK 190 C XLPE/XLPO 135 C EPR 135 C EVA 120 C Hours = 1 Year

13 Testing of CRP Cable Samples at AMS Slide 13 of 18 Mechanical and Chemical Tests EAB Indenter Electrical Tests Elongation at Break (EAB) Indenter Modulus (IM) Oxidation Induction Time (OIT) Thermogravimetric Analysis (TGA) Chemical Electrical Time Domain Reflectometry (TDR) Frequency Domain Reflectometry (FDR) Insulation Resistance (IR) Capacitance (C) Dissipation Factor (DF)

14 Slide 14 of 18 In-Situ Cable Testing in U.S. Nuclear Power Plants RTDR LCR TDR RDC IR FDR I-V

15 CRP Test Results Slide 15 of 18 Trending Moderate Trending No Trending Which tests trend with each polymer type? Manufacturer Component Material EAB IM TGA OIT IR C DF TDR FDR Shanghai Jacket XLPO Shanghai Insulation XLPO - Changzhou Jacket EPR Changzhou Insulation EPR - Hew Jacket SiR Hew Insulation SiR - - Eupen Jacket EVA Eupen Insulation EPR Habia Jacket XLPO Habia Insulation PEEK - Rockbestos Jacket CSPE Rockbestos Insulation XLPE

16 CRP Test Conclusions Slide 16 of 18 Mechanical EAB and IM test results correlated very well with thermal aging except for materials XLPE, PEEK and XLPO. Chemical TGA and OIT tests indicated a clear change for EPR insulation material during increased aging. IR and Impedance test results did not correlate with thermal aging of any insulation material. Reflectometry tests proved to detect aging degradation in silicon rubber. More thermal aging time is required for the other insulation materials.

17 Cable Research Projects at AMS Slide 17 of 18 Develop correlation between insulation and jacket degradation/damage and measurable electrical and/or mechanical properties Develop equipment and techniques for in-situ testing of cable insulation material Develop prognostic methods to estimate remaining useful life of cables Develop equipment and techniques for on-line monitoring of live cables

18 Questions? Slide Slide 03 of 33 18