ML20062L920
| ML20062L920 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/25/1993 |
| From: | Freeman M, Metcalf M NTS/SMA, INC. |
| To: | |
| Shared Package | |
| ML18037A638 | List: |
| References | |
| 60254.04-94N-2, NUDOCS 9401050414 | |
| Download: ML20062L920 (27) | |
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ANALYSIS OF EMI MAIN CONTROL ROOM MAPPING DATA ^ .; AND GE RBVRM EMI TESTING DATA d FOR ' 4 TENNESSEE VALLEY AUTHORITY 'i BROWN'S FERRY NUCLEAR PLANT + P.O. BOX 2000 : DECATUR,AL 35609-2000-ti 1,! t i
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Centract No. RP2409-26 Prepared by: 8. / ' Date (,-2. 5-4 3 : Martin JT Freerdan, P.E. -U ' NTS/ Northeast 533 Main Street, Acton, MA 01720 [!
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W/ , Date G-M-a .; Martin J. Metd'lf, EMC ManagerpVLAP Approved Signatory NT / Northeast I
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Qu t ily Assurance Represe htive L-N / Northeast - i KHD/EMI/60254-4.-2 9401050414 931223 E ;h~i s PDR. P ADDCK 05000259 PDR
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TABLE OF CONTENTS SECTION PAGE NO.
1.0 INTRODUCTION
l-1 l 1.1 Scope 1.2 Purpose 2.0 APPLICABLE DOCU51ENTS 2-1 , 3.0 REQUIREMENTS 3-1 4.0 ANALYSIS 4-1 4.1 General 4.1.1 Prime Power Source Impedance 4.1.2 Narrowband vs. Broadband t 4.2 Brown's Ferry Station, Units 1,2 & 3, Electromagnetic Environment 4.2.1 Power Line Conducted Emission Environment , 4.2.1.1 Frequency Domain Environment 4.2.1.2 Time Domain Environment : 4.2.2 - Radiated Emission Environment 4.2.2.1 Magnetic Field Emission Environment 4.2.2.2 Electric Field Emission Environment 4.3 Susceptibility Analysis 4.3.1 Power Line Conducted Susceptibility 4.3.2 Magnetic Field Radiated Susceptibility. ; 4.3.3 Electric Field Radiated Susceptibility 4.4 Review of Data on GE NUMAC t
5.0 CONCLUSION
S AND RECOMMENDATIONS 5-1 ! 5.1 Conclusions 5.2 Recommendations a L i Report No. 60254.04-94N-2 i Page' No.' i '- l l
r LIST OF FIGURES Figure Title falge a 4-1 Estimate of Prime Power Source Impedance and Correction Factor 4-7 4-2 Narrowband and Broadband Spectra Envelopes of Typical Data Pulse Stream 4 4-3 Composite Worst Case Envelope, CE01, Brown's Ferry Station, 4-9 Units 1,2 & 3 4-4 Composite Wor'st Case Envelope, CE03 Narrowband, Brown's Ferry Station 4-10 Units 1,2 & 3 4-5 Composite Worst Case Envelope, CE03 Broadband, Brown's Ferry Station 4-11 Units 1,2 & 3 4-6 Composite Worst Case Envelope, Conducted Transients, Brown's Ferry 4-12 Station, Units 1,2 &3 4-7 Composite Worst Case Envelope, RE01, Brown's Ferry Station, 4-13 , Units 1,2 & 3 i 4-8 Composite Worst Case Envelope, RE02 Narrowband, Brown's Ferry Station 4-14 Units 1,2 & 3 , 4-9 Composite Worst Case Envelope, RE02 Broadband, Brown's Ferry Station 4-15 , Units 1,2 & 3 4-10 Conducted Susceptibility Analysis 4-16 . 4-11 Magnetic Field Radiated Susceptibility Analysis 4-17 4-12 Electric Field Radiated Susceptibility Andysis 4-18 I k Report No. 60254.04-94N-2 Page No. ii
. _._d
4 hN
1.0 INTRODUCTION
1.1 Scope This report describes in detail the analytical methods and procedures used and the results obtained in analyzing the mapping data taken at the Brown's Ferry Station, Units 1, 2 and 3, and co,mparing these data to the EMI susceptibility test data obtained during the testing performed on the General Electric NUMAC Reactor Building Vent Radiation Monitor (RBVRM). 1.2 Puroose The purpose of this analysis is fourfold:
- 1) To establish the EMI environmental parameters of the Brown's Ferry Station, Units 1,2 & 3, ,
- 2) To review the EMI measurements performed on the GE NUMAC,
- 3) To compare the site elect omagnetic profile measurement data to the presently available GE'NUMAv RBVRM equipment conducted and radiated susceptibility measurement data to determine the adequacy of the GE NUMAC RBVRM equipment for use within the measured environment, and
- 4) To provide to TVA alternative remedial measures in the event that adequate safety margins (6 dB) are found not to exist between the site emissions profile and the GE NUMAC equipment suseptibility levels.
Report No. 60254.04-94N-2 Page No.1-1
hN 'i 2.0 APPLICABLE DOCUMENTS - IEC Standard 801-3 International Electrotechnical Commission IEC Standard, ! Edition 1, dated 9184 SAMA PMC33.1-1978 Electromagnetic Susceptibility of Process Control Instrumentation, Scientific Apparatus Makers Association- , MILSTD-461 ' Electromagnetic Emission and Susceptibility Requirements for the Control of Electromagnetic Interference, dated 4 August 1986 - MILSTD462 Electromagnetic Interference Characteristics Measurement of, dated 31 July 1967 MIbSTD463 Definitions and System of ' Units, Electromagnetic Interference and Electromagnetic Compatibility Technology. MIbSTD-45662A Calibration Systems Requirements dated 1 August 1988 DI-EMCS-80201 Electromagnetic Interference Test Plan MILSTD-1399 Interface Standard for Shipboard Systems, DC Magnetic Field Section 070, Part 1 Environment, dated 26 Febmary 1978 Code of Federal Regulations, Title 10, Part 50, Appendix B, Quality Assurance Criteria for Nuclear Power Plants and Fuel Reprocessing Plants, dated January 1988 . Code of Federal Regulations, Title 10, Part 21, Reporting of Defects and Noncompliance, as of January 1988 NTS/Acton Quality Assurance Manual, Revision 3, dated 14 July 1992 IE Information No. 83-83 Use of Portable Radio Transmitters Inside Nuclear Plants NTS Test Report Test Report for Point of Installation for Electromagnetic. 60254.04-94N-1 Interference (EMI) Mapping of Control Rooms and Refuel Floor, Brown's Ferry Station, Units 1,2 & 3 I i Report No. 60254.04-94N-2 i Page No. 2-1
.a.
j 2.0 APPLICABLE DOCUMENTS (continued) - NTS Test Procedure Test Procedure for Point of Installation Electromagnetic No. 60254.02-94N-1 Interference (EMI) Mapping of Control Rooms and Refuel
- i. . Floor, Browns Feny Station, Units 1, 2 & 3, Revision 1 NTS Test Procedure Test Procedure for Analysis of EMI Main Control Room [
No. 60254.02-94N-2 and Refuel Mapping Data - Reference Data for Radio Engineers,4th Edition
)
i
-l Report No. 60254.04-94N-2 l
Page No. 2-2
2 k g-fg > 3.0 REOUIREMENTS , The requirements of this analysis are fourfold:
- 1) To establish the EMI environmental parameters of the Brown's Ferry Station, Units 1,2 & 3,
- 2) To review the EMI measurements performed on the GE NUMAC,
- 3) T'o compare the site electromagnetic profile measurement data to the presently available GE NUMAC RBVRM equipment conducted and radiated '
susceptibility measurement data to' determine, to the best degree possible, the ' adequacy of the GE NUMAC RBVRM equipment for use within the measured environment, and
- 4) To provide, where necessary, alternative remedial measures in the event that adequate safety margins (6 dB) do not exist between the site emissions profile and the GE NUMAC equipment suseptibility levels.
a l Report No. 60254.04-94N-2 l Page No'. 3-1 l
r M 4.0 ANALYSIS - T 4.1 General 4.1.1 Prime Power Source Impedance The data taken during the site survey of the Brown's Ferry Station, Units 1,2 & 3 does not allow for directly calculating the source impedance of the prime power source feeding the equipments in Units 1,2 & 3. Therefore, an engineering estimate of the source impedance in question was made based upon past experience with such sources. Figure 4-1 shows the estimated source impedance, in dB relative to 50 ohms. In addition, the impedance of the 10 uF Line Impedance Stabilization Capacitors, used during the laboratory EMI testing, is plotted. The sum of these two curves from the correction factor to be used to normalize the site survey conducted emission data .to the laboratory EMI test data. : This correction factor is also plotted on Figure 4-1. f 4.1.2 ' Narrowband vs. Broadband An analysis has been performed to determine if the broadband conducted and radiated :, emission data taken during the site survey of the Browns Ferry Station, Units 1,2 & 3, is i of sufficient magnitude to effect the compatibility analysis. j A comparison of the narrowband and broadband spectra, generated by a typical digital data pulse stream, has been performed to determine the magnitude of the difference between the numerical values of arr.plitude (dBuA vs. dBuAMHz and dBuV vs. DBuVMHZ) associated with the narrowband and broadband spectra. If the numerical value of the difference between the composite narrowband and. broadband spectra, as measured during the site survey tests, is less than the numerical-Report No. 60254.04-94N-2 Page No. 4-1
i' . i 4.0 ANALYSIS (continued) 4.1.2 Narrowband vs. Broadband (continued) difference between the narrowband and broadband ' spectra from the typical data pulse stream then the broadband test data can be ignored as it would theoretically have been generated by.a data pulse stream whose amplitude would be lower than that which generated the narrowband data. The following data pulse stream was selected as the typical data pulse stream. Any other data pulse stream would generate similar results. T A v
~ d -+
. = T r Where: A = 1 Volt d = 1 millisecond T = 2 milliseconds The narrowband spectra for this pulse train is given by:
C , = 20 log {2A d sin nr d/T } + 120 (dB A or dBpV) T nr d/T and the broadband spectra is given by: , C33= 20 log (2Ad) + 240 (dBuA/MHz or dBuV/MHz) Report No. 60254.04-94N-2 Page No. 4-2
a B7M 4.0 - ANALYSIS (continued) 4.1.2 Narrowband vs. Broadband (continued) c Figure 4-2 shows the spectral envelopes for both the narrowband and b'oadband
- p spectra of this typical data pulse stream. As can be seen from Figure 4-2, die s;.me data pulse stream yields narrowband and broadband spectra whose numerical amplitude d fference is approximately 70 dB. Therefore, if the differences between the narrowt
- and and broadband data obtained during the site survey tests is less than 70dB, then the bmadtand data can be ignored.
Figures 4-3 through 4-9 show the composite worst case envelopes for the site survey taken at the Brown's Ferzy Station, Units 1, 2 & 3. It can be seen by comparing the narrowband and broadband data taken for CE03 and RE02 that the amplitude diffelences are less than 70 dB and therefore the broadband data may be ignored. 4.2 Brown's Ferry Station. Unit 1. 2 & 3. Electromannetic Environment The electromagnetic environment presently existing at the Brown's Ferry Station,' Units 1, 2 and 3, is shown on Figures 4-3 through 4-9. Emissions (conducted and radiated) were measured during the site survey testing at the Brown's Ferry Station, Units 1,2 & 3. These data will be used to: 1) quantify the on site electromagnetic environment, and 2) generate proposed limits to be employed during the laboratory EMI testing of the GE NUMAC RBVRM. In addition, where limited susceptibility testing has been performed on the GE NUMAC (not necessarily in the RBVRM configuration), the test data was compared to the NUMAC susceptibility data to make an analytical assessment of the NUMAC's suitability for employment in the Brown's Report No. 60254.GS-94N-2 Page No. _4-3
j ~ 4.0 ANALYSIS (continued) . 4.2 Brown's Ferry Station. Units 1. 2 & 3 (continued) Ferry Station, Units 1, 2 & 3. 4.2.1 Power Line Conducted Emission Environment 4.2.1.1 Frequency Domain Environmer The frequency domain power line conducted emissions environment is shown on Figures 4-3,4-4 and 4-5 for the Brown's Ferry Station, Units 1,2 & 3 site survey data. 4.2.1.2 Time Domain Environment Conducted transients were measured during the site survey testing at the Brown's Ferry Station, Units 1,2 & 3. The conducted transient time domain data was converted to the frequency domain and the resultant is plotted on Figure 4-6. The envelope of the time i domain is equal to or lower than the frequency domain data, and therefore the time domain data will be disregarded in the generation of the proposed conducted emission limits. 4.2.2 Radiated Emission Environment 4.2.2.1 Magnetic Field Emission Environment The on site magnetic field emission environment is shown on Figure 4-6. 4.2.2.2 Electric Field Emission Environment The on site electric field emission environment is shown on Figures 4-7 through 4-9. 4.3 Suscentibility Analysis 4.3.1 Power Line Conducted Susceptibility Figure 4-16 shows the power line conducted susceptibility analysis. Plotted on Figure 4-16 are the applied susceptibility signal spectra in terms of dBuA so as to be directly
, Report No. 60254.04-94N-2 Page No. 4-4 L
q 4.0 : ANALYSIS (continued) i 4.3 Susceptibility Analysis (continued) comparable to the conducted emission data. The susceptibility signal spectra represent the signal levels injected into the GE NUMAC (not in the RBVRM configuration) via its power lines. Also plotted on this figure is the power line conducted emission data measured during i the site survey tests at Browns Ferry Station, Units 1,2 & 3. It can be seen from the data presented on Figure 4-16 that the composite of the spectra from the susceptibility signals injected into the GE NUMAC equittnent, via its prime power lines, is at least 21 dB greater than the emissions found on the site prime power lines. This shows that the GE NUMAC will not be susceptible to noise existing on the site prime power lines with at least a 21 dB safety margin. l 4.3.2 Magnetic Field Radiated Susceptibility , l Figure 4-17 shows the electric field radiated susceptibility analysis. The radiated i magnetic field susceptibility tests performed on the GE NUMAC equipment did not cover j i the same frequency range as the magnetic field emission testing at the site. This does not pose a problem in that the magnetic field emissions measured on site are extremely low, j approaching normal background ambient noise. The existing on site equipments or the GE I NUMAC equipment will not be adversely affected by the introduction of the GE NUMAC into the on site system. j 4.3.3 Electric Field Radiated Susceptibility Figure 4-18 shows the electric field radiated susceptibinty analysis. Plotted on Figure 4-18 is the applied susceptibility signal spectra. The susceptibility signal spectra Report No. 60254.04-94N-2 Page No. 4-5
f hN 4.0 ANALYSIS (continued) 4.3.3 Electric Field Susceptibility (continued) represents the signal levels injected into the GE NUMAC via radiated electric fields. Also plotted on this figure is the radiated electric field emission data measured during the site survey tests at Brown's Ferry Station, Units 1, 2 & 3. It can be seen from the data . presented on Figure 4-18 that the spectra from the applied susceptibility signals injected into the GE NUMAC equipment is at least 12 dB greater than the emissions found on site. This shows that the GE NUMAC was not susceptible to noise existing at the site point of installation with at least 12 dB safety margin. , 4.4 Review of Data on GE NUMAC During the review of the GE NUMAC EMI test data, it was found that only susceptibility (both conducted and radiated) tests were performed on ~ the NUMAC equipment. Also, as noted in Section 4.3 above, in the areas radiated susceptibility (both magnetic field and electric field), the frequency range over which the susceptibility tests were performed do not coincide with the frequency ranges normally associated with these requirements. These limitations on the GE NUMAC EMI test data should be corrected in the near future as it is our understanding that a complete EMI laboratory test evaluation of the NUMAC equipment will be performed in the near future. Report No. 60254.04-94N-2 Page No. 4-6
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5.0 CONCLUSION
S AND RECOMMENDATIONS 5.1 Conclusions Analysis of the test data shows:
- 1) The measured site electromagnetic environment is what one experienced in EMI design, analysis and testing would expect to measure in a site such as this. No unusual measurement data was encountered.
- 2) The EMI test limits, developed for the General Electric NUMAC R3VRM, are realistic and readily achievable limits.
- 3) The analysis of the test and analysis data shows that the GE NUMAC RBVRM will not affect the present on site equipments nor be affected by these same on site equipments.
5.2 Recommendations It is recommended that further EMI/EMC testing be performed on the GE NUMAC RBVRM. The scope of this further testing should cover Conducted Emissions, Conducted Susceptibility, Radiated Emissions and Radiated Susceptibility, 9
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Report No. 60254.04-94N-2 ' Page No. 5 1
. - -+ ,_ GENuclear Energy GeneraibecmcCct pre 175 Curmer Avenue San.tcse CA 95125 September 29,1993 Mr. David Burrell TVA -
Browns Ferty Nuclear Plant Browns Ferry Road Athens, AL 35611
Dear David Burrell:
GE has successfully completed the EMC testing on the NUMAC REVRM. I have enclosed two - copies of the test resuhs report number MS31001F.TR, one bound and the other un-bound. You are permitted to make copies of this report to fuUill your documentation and distribudon needs. The NUMAC RBVRM chassis used for this test did have one difference from the RBVRM chassis installed at the Browns Ferry. This difference is the application of metal oxide varistors, MOVs, on the power ground and neutral. Your RBVRM chassis have an MOV between power and , neutral only, the test chassis has an MOV between power and neutral, between power and ground ; and between ground and neutral. Reference the attached ECN NTD0207 for a better description of this change. Had these varsifiers not been installed on the test RBVRM chassis, the RBVRM chassis would not have passed the IEC 801-5 to level 4 as the test report indicates. Failure mode would have been failure of one or both of the low vohage power supplies. Ilad the tesdng been - done on a chassis with only the MOV between the power and neutral (like your configuration) the chassis would pass IEC 801-5 to level 2 (1 KV)(O which is above maximum transient levels in operating panels. If you would like to upgrade your chassis with these additional MOVs, please let me know and I . will provide you a quotation. This quotation could also be applied to the NUMAC LRM's i currently installed at Browns Ferry and the NUMAC LRM's cu Tently on order by TVA. > If you have any questions regarding the testing or the results you may call our technical lead engineers Ulric Dennis, (408)925-2381 or Chris Miller, (403)925-2064.
- Sincerely.
Chuck Wilson Project Manager - 92993TVA. DOC m verified by test of a NUMAC LDM (Leak Detection Monitor) chassis.
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