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©2014 Analysis and Measurement Services Contact Us
AMS Technology Center, 9119 Cross Park Drive, Knoxville, TN 37923 USA
P. 865-691-1756/ info@ams-corp.com
UPDATE ON INDUSTRY EMC
STANDARDS AND IAEA RESEARCH
FOR CABLE AGING MANAGEMENT
M
A
S
PRESENTED BY:
Chad Kiger EMC Engineering Manager
AMS Corporation
Chad Kiger
PRESENTED TO:
26TH ANNUAL
EQ TECHNICAL MEETING
Clearwater Beach, Florida
Wednesday, November 12th, 2014
Slide 2 of 18
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• Industry EMC Standards
– EPRI TR-102323 Revision 4 released in December 2014
– Start of the update to NRC Regulatory Guide 1.180 (Revision 2)
– Revision to IEC 62003
– 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
Presentation Outline
Slide 3 of 18
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EPRI TR-102323 Rev 4 encompasses
updates for newer plant EMC conditions
• 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 62003 (standard not endorsed)
– Recommended grounding and connector practices
– Endorses latest revision of test standards
Slide 4 of 18
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Efforts have begun to update
NRC Regulatory Guide 1.180
• 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
Slide 5 of 18
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IEC 62003 is currently going through
its first revision
• 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
Slide 6 of 18
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Several IEEE activities in the EMC arena
• 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 62003
• 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
Slide 7 of 18
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• 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
IAEA Research Activities – Coordinated
Research Project (CRP) Objectives
Slide 8 of 18
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Current U.S. Practice for Cable Aging Management
Risk Rank the Cables
Environmental Assessment
Perform Walk Down
Perform In-Situ Tests
Slide 9 of 18
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CRP Timeline
2011 2012 2013 2014 2015
Official Meeting
at SNERDI
(Oct 2014)
Final Meeting at IAEA
(2015)
Original Proposal at IAEA
(Feb 2011)
Informal Meeting at AMS
(Aug 2011)
Official Meeting at IAEA
(April 2012)
Official Meeting at AMS
(July 2013)
Slide 10 of 18
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CRP Report
• 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
COMPLETED (70%) REMAINING (30%)
Slide 11 of 18
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Aging of Samples for CRP Benchmark
• Thermal
• Radiation
• Thermal-Radiation
Irradiation Cell (AECL) Irradiation Thermobox (UJV)
Thermal (AMS and others)
Slide 12 of 18
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Thermal Aging Time and Temperatures
for AMS Tests
MATERIAL AGING TIMES
CSPE 120°C
SiR 190°C
PEEK 190°C
XLPE/XLPO 135°C
EPR 135°C
EVA 120°C
8760 Hours = 1 Year
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Slide 13 of 18
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Testing of CRP Cable Samples at AMS
Electrical Tests
• Time Domain
Reflectometry (TDR)
• Frequency Domain
Reflectometry (FDR)
• Insulation Resistance
(IR)
• Capacitance (C)
• Dissipation Factor (DF)
Mechanical and
Chemical Tests
• Elongation at Break
(EAB)
• Indenter Modulus (IM)
• Oxidation Induction
Time (OIT)
• Thermogravimetric
Analysis (TGA)
Indenter EAB
Chemical Electrical
Slide 14 of 18
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In-Situ Cable Testing in U.S. Nuclear Power Plants
LCR
RDC
FDR
I-V
IR
TDR
RTDR
Slide 15 of 18
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CRP Test Results
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 - - - - -
Trending Moderate Trending No Trending
Slide 16 of 18
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CRP Test Conclusions
• 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.
Slide 17 of 18
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• 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
Cable Research Projects at AMS