ML20236K216

Summary of Operating Reactors Events Meeting 87-24 on 870728.List of Attendees,Events Discussed & Summary of Reactor Scrams & Significant Events for Input to NRC Performance Indicator Program Encl

ML20236K216
Person / Time
Site:	Calvert Cliffs
Issue date:	08/03/1987
From:	Lanning W Office of Nuclear Reactor Regulation
To:	Rossi C Office of Nuclear Reactor Regulation
References
OREM-87-024, OREM-87-24, NUDOCS 8708070034
Download: ML20236K216 (11)

Text

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. . j AUG 0 81987 i

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I MEMORANDUM FOR: Charles E. Rossi, Director l Division of Operational Events Assessment FROM: Wayne Lanning, Acting Chief Events Assessment Branch Division of Operational Events Assessment

SUBJECT:

THE OPERATING REACTORS EVENTS MEETING July 28,1987 - MEETING 87-24 On July 28,1987 an Operating Reactors Events meeting (87-24) was held to l brief senior managers from NRR, RES, AE0D and Regional Offices on events

which occurred since our last meeting on July 21,1987. The list of attendees I

is included as Enclosure 1.

The events discussed and the significant elements of these events are presented in Enclosure 2. Enclosure 3 provides a summary of reactor scrams and "significant events" that will be input to NRC's performance indicator l

program.

/s/

Wayne Lanning, Acting Chief Events Assessment Branch Division of Operational Events Assessment

Enclosures:

As stated cc w/ Encl.:

See Next Page DISTRIBUTION sCentral File NRC PDR EAB Rdg Oudinot Rdg w/o Enclosure EAB Members Pt ~ d. B SL:BWR:EA A i B not ^

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[ k\ [b RLOBEL PB/R ANOWSKY WLN)}ING 7 hl /87 $' /0/87 (,Y e y/$//87 f /87 8700070034BQO3 ORG I4

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, ENCLOSURE 1 4 LIST OF ATTENDEES OPERATING REACTORS EVENTS BRIEFING (87-24 )

July 28,,1987 '

-NAME DIVISION NAME DIVISION O tarostecki NRR Dinners DRP5 C. E. Rossi NRR T. M. Novak AE0D T. Murley NRR R.A.Capra NRR J. Partlow NRR J. Heltemes AE0D P. Baranowsky NRR A. Thadani NRR

~ R. Karsch - NRR S. Varga NRR W. Swenson NRR G.R. Matezis RES J. Carter NRR J. Hopenfeld RES E. Weiss AEOD S. Black NRR J. Roe NRR M. Peranich NRR S. Rubin AEOD L. Engle NRR G. Klingler NRR V. Benaroya AE00 ,

F. Schroeder NRR

ENCLOSURE 2 OPERATING REACT 0PS EVEt(IS BRIEFING 87-24' TUESDAY JULY 28-1987, 11 A.M.

. TIE AGENDA INF0PfMTION f%Y ALSO BE OBTAINED BY DIALING EXTENSION 27174, CALVERT CLIFFS 1, 2 LOSS OF 0FFSITE POWER NORTH ANNA 1. STEAM GENERATOR TUBE RUPRlRE VIDE 0 I

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CALVERT CLIFFS 1 AND 2 LOSS OF 0FFSITF POWER - JULY 23, 1987 PROBLEM ALL OFFSITE POWER LOST TO BOTH UNITS

_CiUSE FAULT ON 500 KV LINE AND PROTECTIVE RELAY PROB'LEMS SAFETY SIGNIFICANCE STATION BLACK 0UT INITIATOR DISCUSSION SEQUENCE OF EVENTS- SEE ATTACHMENT ANOMALIES

1. FAULT ON ONE OFFSITE LINE RESULTED IN LOSS OF BOTH OFFSITE LINES

2. NO 11 AUXILIARY FEEDPUMP (STEAM DRIVEN) TRIPPED ON OVERSPEEE ON STARTUP.

3. 69KV (SMECO) LINE BREAKER TRIPPED ON OVERLOAD ON INITIAL ATTEMPT TO SUPPLY POWER TO STATION - OPERATOR / ELECTRICIAN COMMUNICATION PROBLEM NO 11 RCP (OPEN CIRCUIT IN WINDING) -

FOLLOWUP COMPLETE 1

CONTACT: R. SCHOLL l

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CalVFRT FlIFFS EVENT I

SE0VENCE OF EVENTS 23 JULY 3:25 P.M. -

SITE LOST 5052 500KV 0FFSITE LINE RELAY PROBLEMS RESULTED IN LOSS OF SECOND (5051) 0FFS AND BOTH TURBINE GENERATORS BOTH REACTORS TRIPPED ALL RPS/ESF FUNCTIONED A5 DESIGNED 3: 30 P.M. - 1 AIFRT DFCLARED: NOTIFIED STATE AND LOCAL AUTHORITIES HQ DO NOTIFIED BY PLANT REGION I NOTIFIED BY HQ DO AND BRIDGED TO CCNPS CONTROL RO 3:9u P.M. -

MtG10N 1 UECLARES STANDBY BOTH UNITS IN NATURAL CIRCULATION WITH PRIMARY AND STEAM GENERATOR PARAMETERS STABILIZED 3:45 P.M. -

MANUALLY STARTED 22 AFW PUMP REGIONAL ADMINISTRATOR BRIEFS HEADQUARTERS i

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3:55 P.M. -

REGION I IN STANDBY

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'4:20 P.M. -

69KV SUPPLY TRIPPED WHEN ATTEMPTING TO POWER 23 SERVICE BUS f 4:45 P.M. - i 11 AFW PUMP TRTPPFD ON OVERSPEED ON MANUAL' START. RESTARTED I SATISFArTARilY 5FrilRF013 AFW PUMP 1 BACKUP RESIDENT INSPECTORS FROM SALEM DISPATCHED TO CCNPS 5:00 P.M. -

500KV LINE VERIFIED AVAILABLE IN SWITCHYARD 5:05 P.M. -

ALERT DOWNGRADED TO UNUSUAL EVENT 5:10 P.M. -

PLANT SECURING FROM UNUSUAL EVENT AND EMERGENCY RESPONSE PLAN 5:23 P.M. -

0FFSITE POWER RESTORED TO PLANT VIA 69KV LINE l

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7:00 P.M. -

POWER RESTORED TO RED BUS'FROM 5051 7:20 P.M. -

RING BUS ENERGIZED 8:05 P.M. -

0FFSITE POWER RESTORED TO PLANT VIA 5051 500KV LINE 0.10 P.M. -

UNUSUAL EVENT TERhlNAltU 0:30 P.M. -

REGION I PARTICIPATED IN POST TRIP REVIEW WilH PLANT OPERATIONAL SAFETY REVIEW COMMITTEE 8:37 P.M. -

UNIT 1 ON FORCED CIRCULATION WITH 2 RCP 8:45 P.M. -

UNIT 2 ON FORCED CIRCULATION WITH 2 RCP 8:55 P.M. -

WITH REPORT OF BOTH PLANTS ON FORCED CIRCULATION, REGION I 0FF STANDBY 24 JULY 6:50 A.M. -

UNIT 2 CRITICAL 7:30 A.M. -

UNIT 2 PARALLELED WITH GRID AND INCREASINC POWER W

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ENCLOSURE 3 F!a:it; S (4* StwAFY E!Er ENLIN3 (7/26/E7

1. PLANI E:ECIFIC PATA -

LATE $!TE L' NIT FCeIE EFI CAUEE COM.5t!- YTD yid YTL  %,

CA11053 A!2VI EELOW TCTAL .

!!! 151 07/20!E7FE5N.! 2 4E A EG!F.".

. INT C 0 5 07/21/97 k%F CF.ED 1 10? A .It0lT/ILECT 1:2 7 0 7 07/22/E7V:iiLE 1 100 A E;21.5/ ELECT. h2 13 11 24 07/22/!? FALC VEE 2E 2 100 M E0JIFMENT NO 2 0 2 07/22/E7 CO2K- 2 19 A EDU!FREAT N; 2 2 4 07/23/97 ElLLSTONE 2* E$A EDs!FKINT N3 3 0 2 C7/23/E7 CALVERT CL1rFS 1 100 A UNrN3sN N2 4 0 4 07/23/E7 CALVERT CLIFFS 2 103 A UNtN:rN NO 2 0 2

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i II. COMPARISON OF WEElLY ETATIETICE WITH I!OUE TRY (.' T E't :-E E

. ECRAMS FOR WEEU ENDING 07/2e/87 s

ECFAM.CAUEE POWER NUMBER 1987 1986'. 1;Er DF WED .L Y WEEKLY WEE Lv SCRAME(5) AVEPAGE AVERAGE A .'EF -GF YTD (3) (4 ) (E,'t) 2# POWER >15%

COJIP. RELATED :15% 6 4.4 4.5 5.4 PERS. RELATED(6) >15% 0 1.4 1.8 OTHER(7) >15%  :.C 6 1.2 O.4 O.6 48 Eubtotsi 44 12 7.0 6.5 0.0 4# POWER ':15%

EDUIP. RELATED <15% 0 1.2 PERS. RELATED 1.4 1.3

<15% 0 0.7 OTHER <15%

0.8 0. 9 O O.5 0.2

1. 1. Subtotal ** 0.2

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O 2.0 2.4 2.4

#** Total 44*

12 9.3 8. 9 10.4 MANUAL VS AUTO SCRAMS TYPE NUMBER 1987 1986 1985 OF WEEKLY WEEf:LY WEEf:LY r

- SCRAMS AVERAGE AVERAGE AVERAGE

. YTD t'

MANUAL SCRAMS 3 AUTOMATIC SCRAMS

. .O 1. O -

11 7.7 7.9 9,4 t

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s NOTES s

1. '

PLANT SPECIFIC DATA BASED ON INITIAL PEVIEW OF 50.72 PEPORTS .

FOR THE WEEK OF INTEREST. PERIOD IS MIDNIGHT SUNDAY THROUGH MIDMIGHT SUNDAY SCRAMS ARE DFFINED AS REACTOR PROTECTIVE '

ACTUATIONS WHICP PESULT IN ROD MOTION, AND EXCLUDE PLANNED TESTS OR SCRAMS AS PART OF PLANNED. SHUTDOWN IN ACCORCANCE I WITH A PLANT PROCEDURE.

. 2.

RECOVERY COMPLICATED BY EQUIPMENT FAILURES OR PERSONNEL ERRO UNRELATED TO CAUSE OF SCRAM.

3.

19P6 INFORMATION DERIVED FROM ORAS STUDY OF UNPLAFNED REACTOR TP.IPS IN 1986. WEEKLY DA7A DETERMINED BY TAKING TOTAL TRIPS IN A GIVEN CATEGORY AND DIVIDING BY 52 WEEKS / YEAR.

4. IN 1986, THERE HERE AN ESTIMATED TOTAL OF 461 AUTOMATIC AND MANUAL UNPLANNED REACTOR TRIPS AT 104 PIACTORS (HOLDING

~;

OPERATINGLICENSES). THIS YIELDS AN AVEPAGE RATE OF 4.4 TRIPS PER REACTOR PER YEAR AND AN AVEPAGE RATE OF 8.8 TRIPS PER WEEK

, FOR ALL REACTORS.

5.

BASED ON 107 REACTORS HOLDING AN OPERATING LICENSE.

6. PERSONNEL RELATED PROBLEMS INCLUDE HUMAN ERROR, PROCEDUPAL -

DEFICIENCIES, AND MANUAL STEAM GENERATOR LEVEL CONTROL PROBLEMS.

7.

"OTHER" INCLUDES AUTOMATIC SCRAMS ATTRIBUTED TO ENVIRONMENTAL CAUSES (LIGHTNING), SYSTEM DESIGN, OR UNKNOWN CAUSE.

B.

1985 INFORMATION DERIVED FROM AN ORAS STUDY OF UNPLANNED R IN 1985. WEEKLY DATA DETERMINED BY TAKING TOTAi TRIPS IN A GIVEN 1 CATEGORY AND DIVIDING BY 52 WEEKS / YEAR.

9.

IN 1985 THERE WERE AN ESTIMATED TOTAL OF 541 AUTOMATIC AND MAN UNPLANNED REACTOR TRIPS AT 93 REACTORS (POLDING FULL POWER LICENSES). THIS YIELDS AN AVEPAGE RATE OF 5.8 TRIPS PER REACTOR YEAR AND AN AVERAGE PATE OF 10.4 TRIPS PER WEEK FOR ALL REACTO l

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! $ $hk he (7/27./E7 FERF0WCf ICI:?it:.." !!BNIFICthi EVEliiS l K AEi W E E'.'ENT EVENT LES:FI8710h Gi' CAJ5E s -

LATE '

CiaVEU CL1rF5 1 P/03'E' 1:Te 5M kV FIEEEFE TO THE Fi %i kEFI LCET FO: SEVEFAL  ! RDST CAUSE. ti y!T h :.'.

h7.':S LA.VEti CLIFFS 2, 07!;3/E7 F0ik 5(*.S tv FEEEEKS TO THE FiANT h!FE LCET F0F $!VERA; I FDCT CAUE! kOT VEi th;s',

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