ML20138E255
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DEC 2 21993
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MEMORANDUM FOR:
Herbert N. Berkow, Director Project Directorate II-2 4
Division of Reactor Projects I/II FROM:
James A. Norberg, Chief Mechanical Engineering Branch Division of Engineering l
SU8 JECT:
SUPMARY OF MEETING HELD DECEMBER 16, 1993 (REDUCEO. SCOPE US!
l A-46 PROGRAM FOR FPL AND FPC)
}
The Division of Engineering, Division of Reactor Controls and Human Factors, r
and Project Directorate II-2 set on December 16, 1993, in order to discuss the i
appropriateness of a reduced USI A-46 program scope for the affected plants i
owned by the Florida Power and Light Company (St. Lucie Unit I and Turkey l
Point Units 3 and 4), and the Florida _ Power Corporation (Crystal River Unit 3). Specifically, the discussion focused on the feasibility of a reduced
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effort approach for evaluating the seismic adequacy of electrical relays.
Based on the meeting discussion and subsequent discussions with NRC l
management, an agreement was reached on an acceptable framework for a reduced-scope relay program. Enclosures I and 2 provide the details of the meeting l
discussion and the attendance list.
!I It is noted that the staff is currently reviewing the details of FPL's overall l
USI A-46 implementation programs for St. Lucie and Turkey Point, and is awaiting the licensee's response to a request for additional information.
In addition, the staff is reviewing FPC's proposed implementation program for Crystal River, and, based on an initial assessment of the program, the staff 4
i does not expect any major issues of disagreement except in the case of relays
- i which is addressed in Enclosure 1 as stated above. With regard to roiays, the i !
staff will determine the acceptability of each of the above licensee's program based on the staff agreements which were reached during the subject meeting.
i If you have any questions, please contact me at 504-3286.
i ORIGINAL SIGNE0 BY:
James A.S A.NORBERG i
JAME Norberg, Chief 4
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Olvision of Engineering
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Enclosures:
(1) Meeting Summary 1
(2) Meeting Attendance List DISTRIBUTION: Central Files EME8 Rf/PF/CHRON B0llaw 88oger W8utler i
H8erkow AThadant MVirgilio JWermell G8agchi RJones i
KManaly EMarinos MCaruso IMcBrearty PVChen HGarg
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l KDesal JNorris LRaphavan HSilver tueng RCroteau g
i 00erman CThomas LCa lan WRussell y
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mae incBrearty PYChen KManoly G8anchi JWernell Mk
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MEMORANDUM FOR:
Herbert N. Berkow, Director 4
Project Directorate II-2 j
Division of Reactor Projects I/II FROM:
James A. Norberg, Chief Mechanical Engineering Branch Division of Engineering i
SUBJECT:
SUMMARY
OF MEETING HELD DECEMBER 16, 1993 (REDUCED SCOPE USI A-46 PROGRAM Ft>R FPL AND FPC)
/
The Division of Engineering, Division of Reactor Contro anddumanFactors, and Project Directorate !!-2 met on December 16,1993/in order to discuss the appropriateness of a reduced USI A-46 program scope or th'e affected utilities owned by the Florida Power and Light Company (St.
cie onit I and Turkey f
Point Units 3 and 4), and the Florida Power Corpo tion (Crystal River Unit t
3). Specifically, the discussion focused on thpfeasibility of a reduced
- }
effort approach for evaluating the seismic adeq0acy'of electrical relays.
Based on the meeting discussion and subsequent discussions with NRC management, an agreement was reached on an acceptable framework for a reduced-scope relay program. Enclosures 1 and 2 provide the details of the meeting discussion and the attendance list.
/
/
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It is noted that the staff is currentJy reviewing the details of FPL':: overall
/
USI A-46 implementation programs for/St. Lucie and Turkey Point, and is awaiting the licensee's response t/a request for additional information.
In addition,thestaffisreviewingf9C'sproposedimplementationprogramfor Crystal River, and, based on an/nitial assessment of the program, the staff does not expect any major issues of disagreement except in the case of relays s
which is addressed in Enclosure 1 as stated above. With regard to relays, the staff will determine the acceptability of each licensee's program based on the staff agreements which were reached during the subject meeting.
If you have any questions, please contact me at 504-3286.
)
James A. Norberg, Chief
/
Mechanical Engineering Branch i
Division of Engineering i
Enclosures:
(1) Meeting Summary (2) Meeting Attendance List DISTRIBUTION: Central Files EMEB Rf/PF/CHRON BDLiaw BBoger W8utler HBerkow AThadant MVirgilio JWermell G8agchi RJones KManoly EMarinos MCaruso P99eBrearty PVChen HGarg KDesal JNorris LRaghavan HSilver (Meng RCroteau DDorman CThomas
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OHitt '
EMEB:DE:eh EMES:DE EME8:DE ECG8:DE HICB:DRCH EMEB:DE Jh$)fearty PYC b KManol'y GBagchi JWermeil JNorbtrg l4 DMt
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0FFICIAL RECORD COPY FILENAME: g:\\mcbreart\\a46 relay.atg
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MEMORANDUM FOR:
Herbert N. Berkow, Director Project Directorate 11-2 l
Division of Reactor Projects I/II 4
i FROM:
James A. Norberg, Chief l'
\\
Mechanical Engineering Branch Division of Engineering
SUBJECT:
SumARY OF MEETING HELD DECEMBER 16, 1993 (REDUCED SCOPE USI A-46 PROGRAM FOR FPL AND FPC)
The Division o Engineering, Division of Reactor Controls and Human Factors, and Project Dir ctorate 11-2 met on December 16, 1993, in order to discuss the appropriateness f a reduced USI A-46 program scope for the affected plants owned by the Flor da Power and Light Company (St. Lucie Unit I and Turkey Point Units 3 and
), and the Florida Power Corporation (Crysta.1 River Unit i
3). Specifically, he discussion focused on the feasibility of a reduced i
4 effort approach for valuating the seismic adequacy of electrical relays.
ll Based on the meeting iscussion and subsequent discussions with NRC management, an agreene t was reached on an acceptable framework for a reduced-scope relay program.
closures 1 and 2 provide the details of the meeting j
discussion and the atten ance list.
i, i
It is noted that the staff s currently reviewing the details of FPL's overall s1 USI A-46 implementation prog ans for St. Lucie and Turkey Point, and is i
l l
awaiting the licensee's respo e to a request for additional information.
In l
addition, the staff is reviewi FPC's proposed implementation program for Crystal River, and, based on an nitial assessment of the program, the staff 4
does not expect any major issues f disagreement except in the case of relays which is addressed in Enclosure I s stated above. With regard to relays, the l
staff will determine the acceptabil ty of each licensee's program based on the staff agreements which were reached ring the subject meeting.
If you have any questions, please contact me at 5 -3286.
i James Norberg, Chief Mechan al Engineering Branch Divisio of Engineering i
Enclosures:
(1) Meeting Summary (2) Meeting Attendance list DISTRIBUTION: Central Files EME8 Rf/PF/CHRON BOL BBoger W8utler HBerkow AThadani MVirgilio JWermell G8agchi RJones KManoly EMarinos MCaruso McBrearty YChen HGarg KDesal JNorris LRaghavan HSilver RCroteau DDorman CThomas
- Previously concu t eed o m cs EMEB:DE:eh*
EMEB:DE*
EME8:DE*
Ebk HIC 8tDM EME8:DE we McBrearty PYChen KManoly J8agkhi JWeM1h JNorberg
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l WE 12/21/93 12/21/93 12/22/93 v/v/93
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0FFICIAL RECORD COPY FILENAME: g:\\mebreart\\a46 relay.mtg
DEC 2 2 B93 o
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MEMORANDUM FOR:
Herbert N. Berkow, Director i
Project Directorate II-2 Division of Reactor Projects I/II i
j FRON:
James A. Norberg, Chief j
Mechanical Engineering Branch Division of Engineering 1
SUBJECT:
SUtt4ARY OF MEETING HELD DECEMBER 16, 1993 (REDUCED SCOPE USI A-46 PROGRAM FOR FPL AND FPC) 1 The Division of Engineering, Division of Reactor Controls and Human Factors, l'
and Project Directorate 11-2 set on December 16, 1993, in order to discuss the appropriateness of a reduced USI A-46 program scope for the affected plants 4
owned by the Florida Power and Light Company (St. !*"is Unit I and Turkey Point Units 3 and 4), and the Florida Power Corpora...on (Crystal River Unit 3). Specifically, the discussion focused on the feasibility of a reduced effort approach for evaluating the seismic adequacy of electrical relays.
Based on the meeting discussion and subsequent discussions with NRC management, an agreement was reached on an acceptable framework for a reduced-scope relay program. Enclosures 1 and 2 provide the details of the meeting discussion and the attendance list.
It is noted that the staff is currently reviewing the details of FPL's overall USI A-46 implementation programs for St. Lucie and Turkey Point, and is awaiting the licensee's response to a request for additional information.
In addition, the staff is reviewing FPC's proposed implementation program for Crystal River, and, based on an initial assessment of the program, the staff does not expect any major issues of disagreement except in the case of relays which is addressed in Enclosure 1 as stated above. With regard to relays, the staff will determine the acceptability of each of the above licensee's program based on the staff agreements which were reached during the subject meeting.
If you have any questions, please contact me at 504-3286.
ORIGINA1. SIGNED BY:
JAMES A.NORBERG James A. Norberg, Chief Mechanical Engineering Branch Division of Engineering
Enclosures:
(1) Meeting Sumary (2) Meeting Attendance List DISTRIBUTION: Central Flies EMEB Rf/PF/CHRON BDLiaw BBoger WButler H8erkow AThadani MVirgilio JWermell GBagcht RJones KManoly EMarinos MCaruso pticBrearty PYChen HCarg i
KDesai JForris LRaghavan HSilver DJeng RCroteau DDorman CThomas LCallan WRussell
- Previously cencurred o m er EMEB:DE:eh*
EMEB:DE*
EMEB:DE*
ECGB:DE*
HICB:DRCH*
Ept@ dew.
)ticBrearty PYChen KManoly GBagcht JWermell JNek out 12/21/93 12/21/93 12/22/93 12/22/93 12/22/93
/f/Pr/93 0FFICIAL RECORD COPY FILENAME: g:\\mebreart\\a46 relay.mtg
l 9 '.
ENCLOSURE 1 l.
Summary of Staff Meetir.g Held.on December 16, 1993 i
The subject meeting was held to discuss the appropriate content of a reduced-1-
scope program for resolving USI A-46 for the facilities owned by the Florida l
Power and Light Company (St. Lucie Unit I and Turkey Point Units 3 and 4), and 1
the Florida Power Corporation (Crystal River Unit 3). Specifically, the 4
discussion focused on: an acceptable reduced effort approach for evaluating the
! I seismic adequacy of electrical relays. This issue has been a longstanding point of contention between the staff and the Florida licensees. They have i
maintained that any relay evaluation is not warranted due to the low seismicity of their'glant sites (FPL has recently modified its position to include a review of certain low ruggedness relays), while the staff has been j
reluctant to accept anything less than the approach delineated in the Generic j
Implementation Procedure, Revision 2 (GIP-2).
In light of the meeting discussion, the staff has reconsidered its earlier position that the Florida licensees should perfom full-scope relay functionality evaluations (i.e., p9r the GIP-2 guidelines) in order to resolve USI A-46 for their respective plant sites. The bases for a reduced progran is as follows:
1.
The staff acknowledges that the FPL and FPC nuclear facilities are located in a region with very low seismic hazard that is substantially lower than any other nuclear site in the United States; thus, the likelihood of encountering a Safe Shutdown Earthquake (in the range of 0.lg to 0.15g peak ground acceleration for the subject plants) is extremely low.
I l
2.
For a plant located in a region with such a relatively-low seismic hazard, it is unlikely that a potential seismic event would produce vibratory ground motion of substantial intensity to cause a significant number of relays to. experience chatter, especially if it is confirmed that the anchorages for the relays and the equipment housing them are sufficient to withstand a design basis earthquake.
3.
For the small number of relays which may experience chatter and for which the chatter produces an undesirable affect on safe shutdown i
equipment, it is considered likely that operator action will be sufficient to cope with the undesirable effects (e.g., reset the-relay, work around any affected equipment, etc.) within the time needed to avoid core damage.
Based on the above, and in order to satisfy the intent of the USI A-46 concern regarding potential seismic-induced relay malfunction, the staff agrees that the following reduced program is an acceptable approach for evaluating the seismic adequacy of relays in the FPL and FPC facilities:
Licensees need not perform a full-scope relay review (e.g., GIP-2 approach) provided they confirm, by plant walkdowns, that all essential relays in the safe shutdown path are properly installed; 1.e., installed per design drawings with adequate anchorages.
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2 Additionally, since there is a known group of relays considered as " Bad Actor Relays" (EPRI NP-7148-St., Appendix E) which are susceptible to chatter at very low vibration levels, licensees should confirm that operator action will be sufficient to cope with the malfunction of any such relays, or any other relays, in the srie shutdown path in the context of the procedure described below. The licensees should also 4
consit to replace all " Bad Actor Relays" cf any are identified during t
maintenance or modification activities that occur for other reasons for the balance of plant licensed life.
,t The licensees should commit to develop a top level procedure for coping with the consequences of relay chatter. This procedure should alert operators to the potential for seismically-t.;m.ed relay chattering, describe the expected effects and diagnostic tools available to the operators, and describe methods for coping with the situation.
For the remaining cu,paent in the USI A-46 scope, the licensees are expected i
to perform walkdowns to demonstrate that the safe shutdown path equipment (e.g., pumps, valves, heat exchangers, tanks, cabinets, raceways, etc.)
satisfy the intent of GIP-2, and take whatever action warranted to restore the condition of that equipment and ensure their functional operability in accordance with design requirements, as necessary. Special emphasis should be l
placed on evaluating the adequacy of safe shutdown tanks to ensure that GIP-2 l
criteria are satisfied; for tanks which do not satisfy GIP-2, licensees should l
implement modifications to ensure positive fixes.
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l, ENCLDSURE 2 i
December 16, 1993 Meeting List of Attendees 1
James Wiggins, NRR/DE James Norberg, NRR/EMEB Goutan Bagchi, NRR/ECG8 i
Kamal Manoly NRR/EMEB Dave Jeng, NRR/ECGB Pei-Ying Chen, NRR/EMEB Michael McBrearty, NRR/ EMES Thomas Cervoski, NRR/ECG8 3ruce Boger, NRR/DRCH
?,
Cecil Thomas, NRR/DRCH l
Jerry Wermeil, NRR/HICB Evangelos Marinos NRR/ HIC 8 Hukas Garg, NRR/ HIC 8 Herb Berkow, NRR/PD!!-2 l
Jan Morris, NRR/PDil-2 j
L. Raghavan, NRR/PDil-2 Richard Croteau, NRR/PD!!-2 I
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