ML20141F046

Summary of Operating Reactors Events Meeting 85-28 on 851223.List of Attendees & Viewgraphs Encl

ML20141F046
Person / Time
Site:	Hatch, Browns Ferry, Palo Verde, Catawba, Sequoyah, Byron, Arkansas Nuclear, Turkey Point, Crystal River, Diablo Canyon, Waterford, Rancho Seco, McGuire, 05000000, Trojan
Issue date:	12/30/1985
From:	Holahan G, Holahan G Office of Nuclear Reactor Regulation
To:	Harold Denton Office of Nuclear Reactor Regulation
References
OREM-85-028, OREM-85-28, NUDOCS 8601080523
Download: ML20141F046 (17)

Text

F DEC30febi MEMORANDUM FOR: Harold R. Denton, Director Office of Nuclear Reactor Regulation FROM: Gary M. Holahan, Director Operating Reactors Assessment Staff

SUMMARY

OF THE OPERATING REACTORS EVENTS MEETING ON DECEMBER 23, 1985 - MEETING 85-28 On December 23, 1985, an Operating Reactor Events meeting (85-28) was held to brief the Office Director, the Division Directors and their representatives on events which occurred since our last meeting on December 16, 1985. The list of attendees is included as Enclosure 1.

The events discussed and the significant elements of these events are presented in Enclosure 2. In addition, the assignment of follow-up review responsibility was discussed. The assignments made durin,q this meeting and the status of previous assignments are presented in Enclosure 3.

Completion dates have been assigned for items in Enclosure 3. Each assignee should review Enclosure 3 with regard to their respective responsibilities.

Note that several assignees are approaching the due date. Please be responsive and advise ORAB (D. Tarnoff, x29526) if the target completion date cannot be met.

Gary M. Holahan, Director Operating Reactors Assessment Staff

Enclosures:

As stated cc w/ encl:

See next page DISTRIBUTION Central Files NRC PDR ORAB Rdg ORAB Members i

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• • .....** DEC 30 N6 MEMORANDUM FOR: Harold R. Denton, Director

. Office of Nuclear Reactor Regulation FROM: Gary M. Holahan, Director Operating Reactors Assessment Staff

SUMMARY

OF THE OPERATING REACTORS EVENTS MEETING ON DECEMBER 23, 1985 - MEETING 85-?8 On December 23, 1985, an Operating Reactor Events meeting (85-28) was held to brief the Office Director, the Division Directors and their representatives on events which occurred since our last meeting on December 16, 1985. The list of attendees is included as Enclosure 1.

The events discussed and the significant elements of these events are presented in Enclosure 2. In addition, the assignment of follow-up review responsibility was discussed. The assignment made during this meeting and '.he status of previous assignments are presented in Enclosure 3.

Completion dates have been assigned for items in Enclosure 3. Each assignee should review Enclosure 3 with regard to their respective responsibilities.

Note that several assignees are approaching the due date. Please be responsive and advise ORAB (D. Tarnoff, x29526) if the target completion date cannot be met.

, \ .A . . .x l c. ,

Gary M. Holahan, Director Operating Reactors Assessment Staff

Enclosures:

As stated cc w/ encl:

See next page

', Harold R. Denton cc: D. Eisenhut E. A. Licitra J. Taylor R. Lee C. Heltemes G. Rivenbark T. Murley, Reg. I- D. Muller J. Nelson Grace, Reg. II L. Olshan J. Kepp,ler, Reg. III V. Noonan R. D. Martin, Reg. IV G. Knighton J. B. Martin, Reg. V S. Israel R. Starostecki, Reg. I R. Singh R. Walker, Reg. II C. Norelius, Reg. III E. Johnson. Reg. IV D. Kirsch, Reg. V H. Thompson F. Miraglia R. Bernero T. Speis W. Russell T. Novak F. Schroeder W. Houston B. Sheron D. Ziemann J. Knight D. Crutchfield G. Lainas V. Benaroya W. Regan D. Vassallo E. Jordan E. Rossi R. Baer E. Weiss R. Hernan K. Seyfrit l

ENCLOSURE 1 LIST OF ATTENDEES OPERATING REACTORS EVENTS BRIEFING (85-28)

DECEMBER 23, 1985 NAME ,

DIVISION NAME DIVISION H. R. Denton NRR T. S. Rotella NRR/ DBL /BWD#1 D. Eisenhut NRR W. Regan NRR/PWR-B/FOR D. Ziemann DHFT K. Mitchell NRR/ADLB-B D. Tarnoff NRR/0 RAS B. Sheron DSR0 R. Lee NRR/PBD-7 T. Speis DSR0 E. Butci.cr DHFT/TSCB L. Kelly NRR/0 RAS J. Stone IE/VPB F. Miraglia NRR/PWR-B G. Rivenbark NRR/PD#2 S. Varga NRR/PWR-A R. Bosnak NRR/DSR0 D. Muller NRR/ DBL

0. Parr NRR/PWR-B C. Rossi IE/DEPER/EAB R. Benedict NRR/8-FOB R. Bernero NRR/ DBL G. Edison NRR/PWR-B V. Noonan NRR/PWR-A J. Stolz NRR/PWR-B M. Virgilio NRR/0 RAS C. Ader OCM M. Clausen OCM V. Benaroya NRR/PWR-A/F0B J. Knight NRR/PWR-A J. Wilson NRR/PWR-B/#7 R. Singh IE/DEPER/EAB E. Weiss IE/DEPER/EAB E. Leeds AEOD/R0AB D. Zukor AEOD/ROAB K. Seyfrit AE00/R0AB I. Ahmed NRR/PEICSB/PSB-B' R. Wright NRR/DPLB/ADTS J. A. Calvo NRR/DPLB/PEICSB S. Israel NRR/DPLA/F0B F. Ashe AE0D/ROAB M. Licitra NRR/DPLB

. OPERATING REACTORS EVENTS BRIEFING 85-28 DECEMBER 23, 1985 PALO VERDE UNIT 1 ESFAS ACTUATION, REACTOR TRIP AND COMPONENT MALFUNCTIONS ARKANSAS NUCLEAR ONE UNIT 2 INOPERABLE REACTOR TRIP BREAKERS HATCH UNIT ] FLOODING OF SAFETY RELATED AREAS BYRON UNIT 1 LOSS OF SERVICE WATER

b' PALO VERDE UNIT 1 - ESFAS ACTUATION, REACTOR TRIP AND COMPONENT MALFUNCTIONS

. DECEMBER 16, 1985, (E.A. LICITRA, NRR)

PROBLEMS:. B0P ESFAS ACTUATION (A-TRAIN), LOSS OF POWER (A-TRAIN)

. AND REACTOR TRIP (2% POWER)

MALFUNCTION OF LOAD SEQUENCER (A-TRAIN), ESSENTIAL CHILLER (B-TRAIN) AND AFW PUMP INSTRUMENTATION, SIGNIFICANCE:. CHALLENGES TO SAFETY SYSTEMS AS A RESULT OF RELAY CABINET OVERHEATING CIRCUMSTANCES:

PLANT AT 50% POWER T0'FIX CONDENSER LEAKS, FAN ON AUXILIARY RELAY CABINET FAILED ( A-TRAIN),

CABINET OVERHEATED AND LOAD SEQUENCER MALFUNCTIONED, SEQUENCER TRIPPED FEEDER BREAKER TO 4160V BUS (S03),

A-TRAIN DIESEL STARTED BUT BREAKER TO S03 BUS COULD NOT BE CLOSED UNTIL SE0llENCER CIRCUIT FUSES REMOVED, B-TRAIN ESSENTIAL CHILLER TRIPPED AND PLANT. SHUTDOWN INITIATED, AT 2% POWER UNABLE TO MAINTAIN S.G, LEVEL IN MANUAL FEEDWATER MODE, PLANT TRIPPED FROM S.G. LOW LEVEL INDICATION, FOLLOWUP:

POST EVENT REVIEW DETERMINED:

SEQUENCER MALFUNCTION CAUSED BY OVERHEATING IN CABINET, SEQUENCER MALFUNCTION ACTIVATED ESFAS SYSTEM AND PREVENTED REENERGIZING S03 BUS, ESSENTIAL CHILLER TRIP CAUSED BY LEAKING REFRIGERANT.

SEQUENCER CARD REPLACED AND CHECKED OUT, LEAK IN ESSENTIAL COOLER REPAIRED, PLANT RESTARTED ON DECEMBER 17, 1985,

.. ._ - . _ . - _. .= - - - -

ARKANSAS NUCLEAR ONE UNIT ?-INOPERABLE REACTOR TRIP BREAKERS,

, j DECEMBER 18, 1985 (R, SINGH, IE) l PROBLEM: UNDERVOLTAGE ARMATURES OF TWO RTBS FOUND IN MID-POSITION SIGNIFICANCE:

TWO RTBS INOPERABLE DUE TO BREAKDOWN OF ADMINISTRATIVE CONTROLS CIRCUMSTANCES:

UNIT IN MODE 1

MONTHLY SURV TESTING 0F RPS B CHANNEL IN PROGRESS UNDERVOLTAGE ARMATilRES OF BOTH RTBS FOUND IN MID-POSITION FAILURE MECHANISM WAS PREVIOUSLY DESCRIBED IN IE IN 83-76

UNDERVOLTAGE ARMATURE POSITIONS MAY NOT HAVE BEEN VERIFIED AFTER PREVIOUS OPERATION MAINT, OPENED THE BKRS MANUALLY, RESET AND TESTED THEM SUCCESSFULLY NO PROBLEMS WITH OTHER SIX RTBS FOLLOWUP

NONE t

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Attachment 1 IN 83-76 e, November 2,1983

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TRIP SHAFT I UNDERVOLTAGE TRIP PADDLE ma

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HATCH-UNIT 1 - FLOODING 0F SAFETY-RELATED AREAS DECEMBER 21,1985 (G, RIVENBARK, NRR)

PROBLEM  !

RHR PUMP ROOM ACCIDENTALLY FLOODED DURING MAINTENANCE 0THER ROOMS CONTAINING SAFETY-RELATED EQUIPMENT SUBSE0VENTLY FLOODED TO LOW LEVELS SIGNIFICANCE POOR MAINTENANCE PROCEDURE i

POSSIBLE INTERACTION OF DRAIN SYSTEM CIRCUMSTANCES UNIT TOTALLY DEFUELED MAINTENANCE BEING PERFORMED ON ISOLATION VALVE IN RHR TORUS SUCTION LINE SINGLE AIR-0PERATED VALVE RELIED ON FOR ISOLATION OF TORUS LOSS OF ELECTRIC POWER TO ACTUATOR SOLEN 0ID DUE TO DIESEL TESTING RESULTED IN OPENING ISOLATION VALVE WATER FLOWED BY GRAVITY THROUGH VALVE ON WHICH MAINTENANCE WAS BEING PERFORMED RHR ROOM FLOODED 14 FEET DEEP SUBSEQUENT DRAINING OF RHR ROOM RESULTED IN WATER BEING INTRODUCED TO OTHER SAFETY EQUIPMENT ROOMS FOLLOW-UP

- REGION II SENDING GR0llP TO SITE TO EVALUATE DAMAGE, MAINTENANCE PRACTICES, AND POTENTIAL DRAIN SYSTEM

-INTERACTION i

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H It RHR SYSTEM P&ID A EDWIN 1. HATCH GeorgiaPower mA nucuan n. ant - u=ir i FIGURE 7.4-7 (SHEET 2 OF d

. - - . . _ - - _ _ _ - . ---_-_.- - _ . - --- . -. =

i l- BYRON UNIT 1 - LOSS OF SERVICE WATER S, ISRAEL L

PROBLEM: LOSS OF BOTH SERVICE WATER TRAINS (PRA SEQUENCE) l .

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SIGNIFICANCE: RCP SEAL LOCA WITH CONSEQUENTIAL LOSS OF ECCS CIRCUMSTANCES:

REVIEW 0F LICENSEE'S SIMPLIFIED PRA

BROOKHAVEN IDENTIFIED A NEW CORE MELT SEQUENCE WITH HIGH LIKELIHOOD IN 5 X 10-4/RY IF OPERATING SERVICE WATER TRAIN FAILS AND STANDBY TRAIN IS NOT

AVAILABLE OR FAILS

A. CCW PUMP TRIPS IN SIX MINUTES (CCW COOLS RCP SEALS, CHARGING PUMPS, ECCS PUMPS) l j B. RCP SEALS FAIL (N0 CCW NOR CHARGING FLOW)

C. ECCS FAILS FOLLOWUP:

l LICENSEE ~HAS MADE AVAILABLE A THIRD SERVICE WATER PUMP i (FROM UNIT 2), .THIS WAS ACCOMPLISHED PRIOR TO RETURN TO POWER I

(DECEMBER 18)

~

l SURVEY OF W PLANTS DOES NOT INDICATE SIMILAR DEPENDENCE ON

ONLY TWO SW PUMPS (BRAIDWOOD TO TMPLEMENT CROSSTIE)

SURVEY OF OTHER PWR'S IN PROGRESS 1 l

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REACTOR SCRAt1 EUMMARY I WEEK ENDING 12/22/85 I. PLANT SPECIFIC DATA i

DATE SITE UNIT POWER RPS CAUSE COMPLI- YTD

CAT. IONS TOTAL 1

1 4 12/17/85 PALD VERDE 1 2A PERSONNEL NO --

12/19/05 W AT ERFDP*.; - 3 100 A EQUIP /E M VLV NO -

12/20/E5 PALO VERDE 1 41 A PERSONNEL NO -

! 12/20/85 CATAWBA 1 100 A EQUIP /MFW VLV NO --

12/21/85 DIABLD CANYON 2 50 A EDUIP/MFW VLV NO -

I 12/22/E5 MCGUIRE 1 100 A EQUIP /V POW SUP NO -

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II. COMPARISON OF WEEKLY STATISTICS WITH INDUSTRY AVERAGCC SCRAMS FOR WEEK ENDING

- 12/22/E5 SCRAM CAUSE FOWER NUMBER NUMBER 1984 OF NORMALIZED (6) WEEELY SCRAMS (5) TO 1984 AVERAGE (3) (4)

• • POWER 15%

EQUIF. RELATED >15% 4 3.6 3.9 (60%)

PERS. RELATED (7 ) >15% 1 0.9 1.8 (25%)

OTHER(S) >15% 0 0.0 0.8 (12%)

• • Subtotal **

5 4.5 6.5

• • FOWER <15%

EDUIP. RELATED <15% 0 0.0 1.4 (46%)

FERS. RELATED <15% 1 0.9 1.4 (46%)

OTHER <15% 0 0.0 0.2 (8%)

• • Subtetel **

1 0.9 ~.0

• • • Total **4 6 5.4 0.5 I.

MANUAL VS AUTO SCRAMS i TYPC NUMBER NUMBER 1984 OF NORMALIZED WEEKLY SCRAMS TO 1984 AVERAGE MANUAL SCRAMS (9) 0 0.0 1.1 AUTOMATIC SCRAMS (9) 6 5.4 8.4

[

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i$. NOTES (1) PLANT SPECIFIC DATA BASED ON INITIAL REVIEW OF 50.72 REPORTS FOR THE WEEK OF INTEREST. PERIOD IS MIDNIGHT SUN. THROUGH  !

l MIDNIGHT SUN SCRAMS ARE DEFINED AS REACTOR PROTECTIVE ACTUATIONS WHICH RESULT IN R0D MOTION, AND EXCLUDE PLANNED TESTS OR SCRAMS AS PART OF' PLANNED SHUTDOWN IN ACCORDANCE WITH A PLANT PROCEDURE.

(2) RECOVERY f_0MPLICATED BY EQUIPMENT FAILURES OR PERSONNEL ERRORS UNRELATED TO CAUSE OF SCRAM

! (3) 1984 'INFORMATION DERIVED FROM AEOD TRENDS AND PATTERNS REPORT OF UNPLANNED REACTOR TRIPS IN 1984, DATED 9/11/85. (SEE TABLES i 2.0-2, 2.1-4, AND 2.2-1) WEEKLY DATA DETERMINED BY TAKING-TOTAL

. _ TRIPS IN A GIVEN CATEGORY AND DIVIDING BY 52 WEEKS / YEAR.

(4) IN 3984, THERE WERE A TOTAL OF 492 AUTOMATIC AND MANUAL REACTOR l,

TRIPS AT 83 REACTORS (HOLDING FULL POWER LICENSES). THIS YIELDS AN AVERAGE RATE OF 5.9 TRIPS PER REACTOR PER YFAR AND AN AVERAGE l RATE OF 9.5 TRIPS PER WEEK FOR ALL REACTORS.

l (5) BASED ON 92 REACTORS HOLDING A FULL POWER LICENSE, AS OF 11/30/85.

1 l- (6) NORMALIZED VALUES ALLOW COMPARISON TO 1984 DATA BY MULTIPLYING

! ACTUAL 1985 VALUE BY: (83 REACTORS IN 1984)= 0.90 l (92 KEACTORS IN 1985)

I (7) PERSONNEL RELATED PROBLEMS, AS USED IN AEOD TRENDS AND PATTERNS REPORT, INCLUDE HUMAN ERROR, PROCEDURAL DEFICIENCIES, AND MANUAL STEAM GENERATOR LEVEL CONTROL PROBLEMS.

I (8) "0THER" INCLUDES AUTOMATIC SCRAMS ATTRIBUTED TO SOME COMBINATION i 0F HARDWARE FAILURE'AND HUMAN ERROR, ENVIRONMENTAL CAUSES

! (LIGHTNING), SYSTEM DESIGN, OR UNKNOWN CAUSE, l

(9) MANUAL SCRAMS ONLY AND AUTOMATIC SCRAMS ONLY ARE DERIVEn FROM TOTAL AUTOMATIC AND MANUAL SCRAMS DATA PROVIDED IN TABLE 2.0-2 0F AEOD REPORT.

- _,. - . - .. .. .. . -_ ~ . _ . _ -_ _- . - . -

t 1'

Page No. 1 12/:7/!:

2 OPERATING REAtiGRS EVENTS MEET!NS FDLLOWUP ITEMS AS OF MEETINS 85-28 DN DE: EMBER 23,1985 (IN ASCEN !NS MEETINS CATE, NSSS VENDUR, FA !LITY ORDER)

REETINS FA:!LITY RESFCN!!PLE TASrt!!:RIPTICN SCHEDULE CLOSED DATE CCMMENTS l

E !!RI NSSS VENOM / DIVISICU CC'!?LET. SY DOCU*ENT,

REETINE EVENT!!SC;1P. IN !V! DUAL DATE(S) EETING,ETC.

! SUE I ,

, CRYSTA' . RIVER 3 ICSB/ ROSA,F. CONS!?ER NEEt FCR A::!TIONAL 12/30/25 OPEN / / ICSS CONSitERINS

! 0!!C /25 BM / TEM'. LDSS / REQUIREMENTS ON ALARMS / 09/30/85 OCONIE 1 LCSS OF

! 0: N't! 12/:S/84 AN O :!ATCES 07/30/S: ANNUN:lA.

(4/25/851 IN ANAL.

.CF REGUIREMENTS.

E5-13 TURKEY P !NT 3  !!! /FARR, D. REV!EW A!ECUA:Y OF 60VERNCR 01/05/86 0 FEN / /

08/13/E5 W /FDEi-TRIP / CES!SX CN TURF!NE l RIVEN AFW 10/13/S5 LCSS CF AFW PUMFS / /

B5-14 SE2 D AM EL / STAT. C INITIATE STAFF REVIEW CF TVA 12/30/95 OPEN / /

CE/26/55 W / UNITS 1 & 2 /- SUEMITTALS 09/30/E5 VOLUNTA;Y 'l /

l 'SH"T::WN EY TVA BE:AUSE C* EC INA:EEUA:!ES

, 85-21 TRO:AN ESI /WERMIEL J REEIAM!NE NEED FOR THIS 01/31/86 0 FEN / /

10/22/85 / IN RFECT / INSTALLATICN AND GENERIC / /

, SETFDINTSFOR AFFLICA!!LITY / /

TRIP GF AFW I

P!N S ON LDW SL'OTICN FRES$"!E l 8!-23 BR gN! FERRY IE /F KA% TOR DISCUSS WITH FEMA NRC POSITICN 01/30/E6 OPEN / / TO EE t!SCUSSED

!!/18/S5 / CFFSITE / WITH FESARD TC EMER6EN:Y PLAN 12/18/95 DUtlN3 hEIT-CONTAM!N. EIEF:ISE / / FEMA /NRC STEERINS j IN:!LEhi DURING COMP!TTEE MONTHLY EMERSEN:YPLAN MEETINS j EXEF:!!!

! 65-26 RANCHO SEOD DHFS/ RUSSELL R WILL REVIEW WITH H R DENTON THE 12/31/85 OPEN / /

. 1 /09/25 - / PEA !CF TF!F / E!!!T!NS FDLICY ON INFORMATION / /

PLA;ED IN LICENSED OPEFATOR / /

FILE l

] 83-26 RAM:F SE:0 RSB /LAN!! E DETERf!!NE THE NEED FOR 01/30/E6 DPEN / /

j 12/C9/25 / FEA TCR TRIP / OPERATION 0F THE HIGH FRESSURE / /

! INJECTION SYSTEM DURING THE / /

! DEC. 5,1985 CVERHEATIN6 EVENT 4

ATRAN;MOSECO 1 i 23-25 FAL: VIF:! ! NFF /CE"!CHTIEL: ASSESSMENT OF STARTUP AND CF. 01/30/26 OPEN / /

l 12/23/85 CE / ESFAS / EIFERIEN;E FOR PALO VERDE UNITS //

A:TUAT!:N,REACTO _IL2. / /

R TRIF, AND COMPCNENT l -MALFUN:T!DNS

! I Pa;e Ms. 2 .

• 12/27/95~  !

e DFERATING REntTORS EVENTS Mi* TINS FOLLONUP ITEMS AS OF EETING B5-28 DN DECEMBER 23,1985 1

(IN ASCENDIN6 MEETINS DATE, NSSS VENDDR, FA !LITY ORDER)

MET NS FA:!LITY RESFDNSIBLE TASKCESCRIPTICN SCHEDULE CLOSED DATE COMMENTS

-NUM!ER/ NSSS VENDOR / DIVISION / COMFLET. BY D0tuMENT, MEETINS EVENT IESCRIP. INDIVIEUAL DATE(S) MEETINS,ETC.

DATE 85-28 HATCH 1 NRR /HOLAHAN, 6 INFORM SHDRENAM P.M. OF HATC4 12/31/85 CLOSED 12/27/E5

12/23/25 6E / FLC00!%S OF / FLDC:lNS EVENT / /

SUMMARY

OF SAFETY RELATED / / PAICH FLOD !N3 AREAS- RHR ROOM EVENT SENT TC 14 FT DEEF $93REHAM 12/27/85

! E!-28 M1TI NRR /HDLAHAh, 6

SUMMARY

FOR CALENDAR YEAR 1985 01/15/56 0CEN //

12/23/25 NA / FALD VERIE / OF 0.R. EVENTS' BRIEFINGS / /

STARTUF PRESENTATICNS ON A PEE- PLANT //

DIFFIC:7.T!ES BASIS i

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