ML20052F306

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LER Output on BWR Compressed Air Sys & Other Instrument Sys Not Required for Safety from 1969 to Present
ML20052F306
Person / Time
Issue date: 03/25/1981
From:
NRC
To:
Shared Package
ML19219B002 List:
References
FOIA-81-417 NUDOCS 8205120332
Download: ML20052F306 (30)
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  • CONTROLS COMPONENTA SREAK AT A POCONNECTOR. CABLE BROWN $

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  • CONTROLS WEAR.

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MAR 25, 1989 LER CUTPUT ON SWR COMPRE55ED AIR SYSTEMS A%D PA!E 2 OIHER INSIRUMENT SYSTEMS NOI REQUIRED FOR SAFETY FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACIL11Y/5Y5 FEM / DOCKET NO./ CortPONENT/ COMPONENT SUSCODE/ LER No./ EVENT DATE/ CAUSE/CAUSE SU8 CODE / CONTROL MO./ REPORT DATE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPI!ON BRUNSWICE-2 85088324 841878 WHILF DOING P.T. 14.1 (CONTROL RCDOPERASILITY), THE OPERATORS NOTICED Ho OTHR INST SYS NOF'IEOD FR SFTY 78-834/03L-0 050278 INDICATION OF POSITION 45 WHEN R0D 26-83 WENT FROM 46 10 44 AND AGAIN F INSTRUMENTATION + CONTROLS 828984 38-DAY ROM 44 10 46 (IECHNICAL SPECIFICATION 3.1.3.7). $ WITCH -' GE OTHE$/' N,DT APPLICABLE ,)ENERAL ELECIRIC CO. A TROUBLE TICKET WA5 SUBMITIED. THE REED SWITCH WILL SE r. NECKED Ai THE FIRST OPPORTUNITY (AN OUIAGE OF SUFFICIENT DURATION TO ALLOW CHECKING IH ESE SWITCHES) AND BE REPLACED AS NEEDED. BRUNSWICK-2 85808324 872178 COND;3CTIVITY RECORDER CO-CR-24 WHICH MONITORS THE OUIPUT OF FOUR CHLORI OTHR INST SYS NOT RE00 FR SFTY 78-054/83L-0 es2s78 DE LIAK DEIECTORS ON THE PLAMi'S MAIN CONDENSER HOTWE(L OUILET AND MECHA INSTRUMENTATION JrCONTROLS 822894 30-DAY NICALLY INITIATES HIGH CONDUCIIVITY ALARMS, WA5 FOUND IMOPERA8LE. (IECH RECORDER GE NICAL $PECIFICATION 3 3.5.6) COMPONENT FAILURE INSTRUMENT LEED5 8 MORTHRUP CD. FAILURE OF THE RECORDER WAS CAUSED BY A BROKEN DRIVE CORD INSIDE THE REC ORDER. THE DRIVE CORD WA5 REPL ACED AND THE RECOPDER DECL ARED OPERATIONA 1. THE RECENILY APPROVED PREVENT ATIVE MAINIENANCE Ib;TRUCTION Mlle-IF 1 NCLUDES DRIVE CORD INSPECTION AND REPLACEMEHi IF NECESSARY. SRUNSWICK-2 85888324 820878 CHLORIDE LEAK DETECioR (CDD-CIT-1) WAS FOUND INOPERABLE DURING PERIODIC OTHR INST-5YS NOT REOD FR SFTY 78-883/03L-0 014879 TEST 5.4.P. THIS INSTRUMENT INDICATES THE INLET CONDUCTIVITY OF THE COM INSTRUp(NTAi!OH + CONTROLS 825294 30-DAY DENSATE DEEP BED DEMINERALI2ER (CDD). (IECHNICAL SPECIFICATION 3.3.5.6) SWITCH GE COMPONENT FAILURE . INSTRUMENT tEEDS S NORTHRUP CO. f j D-CIT-l. A FAULIY INTERRUPIER SWITCH IN RECORDING UNIT CAUSED CHLORIDE LEIK DETECTOR TO FAIL. INTERRUPIER SW11CH WAS REPL ACED AND THE CHLORIDE LEAK DEIECTOR DECLARED OPERABLE. THIS IS CONSIDERED AN ISOLAIED EVENT AND HO FURIHER CORRECilVE ACTION 15 REQUIRED. COOPER-l 05000298 058077 (77-25) DURING ROUTINE SURVEILLANCE TESTING RWCU-TIS-99 (TEMPERATURE IND OTHR INST SYS NOT R OD FR 5FTY 77 03L 060777 ICATING SWITCH) WAS FOUND 10 SE HIGHER THAN ALLOWED IN TECHNICAL SPECIFI INSTRUMENTATION + CONTROLS 018886 30-DAY CATIONS. THE SYSTEM IS NOT REDUNDANT AND THE EVENT IS NOT REPETITIVE. TH NO SUBCOMPONENT PROVIDED GE E bEIPDINT WA5 RECALIBRATED AND PLACED WIIHIM TECHNICAL SPECIFICATION LI ~ COMPONENT FAILURE MII5. CAUSE SUICODE NOT PROVIDED FENWA ELECTRONICS CO. THE FENWAL MODEL 56500-1 TEMPERATURE INDICATING SWITHCH HAD APPARENTLY D RIFTED ONE DEGREE FAHRENHEli. ~ I

i MA9 25, 8981 LER OUTPUT ON BWR COMPRESSED AIR SYSTEMS AND PAGE 3 OIHER IN5IRUMENT SYSTEMS NOT REQUIRED FOR SAFETY FROM 1969 10 THE PRESENI OUTPUT 50RIED SY FACILITY AND EVENT DATE FACILITY /5YSTEN/ DOCEET No./ COMPONENT /CDMPONENT SURCCDE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUBCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / CDMPONENT MANUFACIURER h555 REFORT TYPE CAUSE DESCRIPTION COOPER-t 05808298 872777 (77-34) CABLES At38 AND AtS8 IN THE CABLE SPREADING ROOM WERE FOUND ROU OTHR INST SYS N0T R GD FR SFTY 77 83L 882577 TED THROUGH CABLE TRAYS OF BOTH DIVISIONS FOR A SHORT DISTANCE OF ABOUT f COMPONENT COD Di APPLICA8tE 018895 30-DAY 3 FEET. SUSCOMPONE NOT APPLICABLE GE OTHER CAUSE CODE NOT PROVIDED ITEM APPLICABLE PERSONNEL ERROR DURING CONSTRUCTION. COOPER-t s/ 05800298 128178 DURING NORMAL OPERATION PRES 5URE RECORDER PC-PR-5824 WAS FOUND READING F E4D FR 58TY 78-837/83L-0 122778 ULL SCALE AND DETERMINED INOPERABLE. TECHNICAL SPECIFICATIONS TABLE 3.2 INST SYS NO A+ CONTROL 5 OTHE 023377 38-0AY F REQUIRES TKO OPERABLE CHANNELS OF INDICATION. THERE WAS NO EFFECT UP INSTRUMENTATIDR INDICATOR GE ON PUBLIC HEALTH AND SAFETY. THE REDUNDANT INDICATION WA5 AVAIL ABLE AND COMPONEN T AILURE OPERABLE. ELECTRO C HONEYW L CORPORATION THE CAUSE OF THE EVENT WAS ISOLATED TO A BAD AMPLIFIER CIRCUIT 80ARD. TH E CIRCUIT BOARD WA5 REPLACED AND THE RECORDER RECALIBRAIED. THE RECORDE R IS A HONEYMELL VUIRONIC MODEL 37302. THE PART NUMSER FOR THE AMPLIFIE R CIRCUIT BOARD IS 3868357D-58L 05088298 888979 WHIL E PERFORMING SURVEILL ANCE PROCEDURE (5.P. 6.2.2.2.5) ON THE RELIEF V C00PER-l OTHR INST SYS NOI'RE0D FR SFTY 73-02e/05t-0 898579 ALVE BEtt0WS MONITORING SYSTEM AS REQUIRED BY TECH. SPEC. 4.6.D.4 PRESS INSTRUMENTATION + C3HIROLS 826895 38-DAY URE SWITCH MS-PS-71G F AILED 10 ACTUATE. THE PRE 5"URE SWITCHES ON ALL TH SENSOR / DETECTOR / ELEMENT GE E DIHER RELIEF VALVES WERE OPERABLE. THERE WERE N0 SIGHIFICANT O_CURREN DESIGN / FABRICATION ERROR CES AS A RESULT OF THE EVENT. SIMILAR EVENT WAS DE 75-8. THERE WERE NO ADVERSE AFFECTS TO PUBLIC HEALTH AND SAFETY. MANUF4CTURING ITEM i APPLICABLE A PRE 55URE SWITCH. MODEL A 17-9. MANUFACTURED BY PRES 5URE CONTROLS. INC. FAILED TO ACTUATE. PRES 5URE SWITCH WAS REPLACED 4 SURVEILLANCE TESTING PERFORMED SATI5FACTORILY. REMOVED PRESSURE SWITCH WAS RETURNED 10 MANJ FACTURER WHOSE ANALYSIS SHOWED THAT IT HAD SEEN IMPROPERLY ASSEMBLED. M ANUFACTURER STATED THIS WAS A UNIQUE OCCURRENCE 8 NO FURTHER ACTION RE4. 85808298 113079 DUR*s'G HORMAL OPERATION. SUPPRESSION CHAMBER LEVEL INSTRUMENT PC-LI-12 F COOPER-l OTHR INSI SYS Noi REQD FR 5FTY 79-838/03L-e 122879 AILED DOWN-SCALE. 1.5. TABLE 3.2.F REQUIRES ALL LEVEL IN51RUMEN15 OPERA INSTRUMENTATION + CONIROL5 027959 30-DAY SLE. ALL OIHER LEVEL INDICATORS WERE INDICATING PROPERLY. THERE WERE N POWER SUPPLY GE O SIGNIFICANT OCCURRENCES A5 A RESULT OF THIS EVENT AND THERE WERE NO AD ~ VERSE AFFECTS TO PUBLIC HEALTH AND 54FETY. THIS EVENT IS NOT REPElli!VE COMPONENT FAILURE INSTRUMENT OTHER THE LEVEL INDICATOR FAILED DUE 10 A FAILURE OF THE POWER SUPPLY. THE PO WER SUPPLY IS A MODEL CPS-15 24/28 MANUF ACTURED BY SI ANDARD INCORPORATED . THE POWER SUPPLY WAS REPL ACED AND PROPER INDICATION WAS VERIFIED. TH E FAILURE OF THE POWER SUPPLY WAS APPARENTLY DUE TO AN INTERNAL SHORI. W HICH CAUSED THE POWER SUPPLY TRANSFORMER TO OVERHEAT AND FAIL. I I

I MA2 25, l938 LER 00TPui FN SWR COMPRE55ED AIR SYSTEMS AXD PATE 4 OTHER IN51RUMENI SYSTEMS NOT REQUIRED FOR SAFETY FROM 8969 10 THE PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ COMPONENT / COMPONENT SUSCODE/ LER No./ EVENT DATE/ CAUSE/CAUSE SURCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / COMPONEHi MANUFACTURER H555 REPORT TYPE CAUSE DESCRIPTION COOPER-l 85888298 048888 WHILE PERFORMING SP 6.2.2.2.6 TO CHECK OPERABILITY OF ADS ACCUMULATORS. CBMPRESSED AIR SYSTEMS + COHi 88-818/03L-t 851288 3 0F 6 CHECK VALVES UPSTREAM OF ACCUMUL WERE FOUND 10 HAVE EXCESSIVE SAC VALVE 5 / 832080 30-DAY K LEAKAGE. (I.S. 3.5.E.8) AT TIME FAILED VALVE 5 WERE DISCOVERED. PLANT CHECK / GE WAS 5NUIDOWN FOR REFUELING 4 MAINT. ADS HAS MEVER SEEN IMOPER BECAUSE IN CGMPONENT F AILURE STRUMENT AIR (IA) HAS ALWAYS BEEN AVAIL. 8011 LED NITROGEN. A SACKUP SUPP MECHANICAL ' LY TO IA. WAS ALSO AVAIL. THERE WERE NO SIGNIF OCCURRENCES A5 A RESULT 0 F THIS EVENT AND THERE WERE NO ADVERSE EFFECis 10 PUBLIC HEALTH & SAFELY DRAGONVplVE,INC. THE 6 VALVES (DRAGON. MODEL C12457R WlIH BUNA-N SEATS) WERE REMOVED TRON THE SYSTEM FOR INSPECTION ANO REPAIR. THE SEAIS WERE EMBRITILED ALLOWI HG EXCESSIVE BACK LEAKAGE. ETHYLENE PROPYLENE 0-RINGS WERE INST ALLED AN / D THE VALVES RETURNED 10 SERVICE. 5.P. 6.2.2.2.6 WA5 PERFORMED SUCCE55F ULLY. (76-3) THE B" TIP PROBE INDICATOR SHOWED THE PROBE TO BE P AST THE CHAME ER SHIELD, "IN iMIS SITUATION. THE SALL VALVE REMAINS OPEN AND ISOLATION DRE5 DEN-2 r# 85800237 810976 OIHR INSI SYS H REQD FR SFTY 76 03L 812676 CIRCUIT CLOS / INTERRUPTERS 884076 38-DAY FUNCTION LOST. THE BACK UP 5 HEAR VALVE WAS OPERABLE HQ SUSCOMPO ENT PROVIDED GE f PERSONNE V RROR GENERA (SutCODE NOT PROVIDED CAUSE ELECTRIC CO. THE CHAMBER SHIELD GRAVITY OPERATED LIMIT SWITCH WAS MI5 ALIGNED ANO WAS I' REALIGNED BY TECHNICIANS. THESE LIMIT SWITCHE5 WILL SE REPLACED BY PROXI MITY SWITCHES. DRE5DEH-3 05860249 082775 DURING INSTRUMENT SURVEILLANCE WHILE THE UNIT WAS SHUIDOWN FOR REFUELING CIHR IN51 SYS H REQD FR SFTY 75 Oli 090475 , PRESSURE SWITCH F53-263-51A AND 8 WERE FOUND WITH SE1POIN15 0F 685 AND INSTRUMENTAT + CONTROLS Ol3207 2-WEEK 61% PSI. EXCEEDING THE TECH SPEC LIMIT OF 600 PSI. SWITCHES PERMIT LOW C HQ SUBCOM ENT PROVIDED GE DHDEN5ER VACUUM AND MAIN STEAM LINE VALVE CLOSURE SCRAM 10 BE BYPASSED 5 COMPONEN AILURE ELOW 600 PSI. (50-249/75-40) CAUS UBCODE NOT PROVIDED MELI N CORP. LONG PERIODS Ai ZERO PRES 5URE APPARENTLY CAUSE IN51RUMENT SET POINTS TO DRIFT. SWITCHE5 WERE RESET TO WITHIN LIMITS. DRE5 DEN-3 05800249 182676 ( 76-30 ) DURING REFUELING OUIAGE LOCAL LEAK-RATE TESTING. THE TIP PURGE OTHR INST SYS HOT QD FR SFTY 76 03L 681876 CHECK VALVE EXHIBITED A LEAKAGE RATE OF 188 SCFH (IECH SPEC LIMIT 29.a VALVES 016298 30-DAY 88 SCFH). THE VALVE WAS REMOVED FRDM THE SYSTEM AND CLEAMED WITH COMPRE5 NO SUSCOMPON PROVIDED GE SED AIR. FOLLOWING REINSTALLATION, TE5flNG YIELDED A LE AK AGE RATE WELL 5 ~ COMPONENT F URE ELOW THE PERMISSISLE LIMIT. CAU5E SUB DE NOT PROVIDED OTHER THE VALVE LEAKAGE WAS APPARENTLY CAUSED BY DIRT ON THE BALL OR THE SEAi! HG AREA. I

I MAR 25, SCSS LER OUTPUT ON BWR COMPCESSED AIR SYSTEMS 0]3 PAGE 5 OINER INSTRDMENT SYSTEMS NOT REQUIRED FOR S AFETY FROM 1969 TO THE PRESENI OUTPui 50RIED af FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ CDMPONENT/ COMPONENT SURCODE/ LER No./ EVENT DATE/ CAUSE/CAUSE SUBCODE/ CONTROL NO./ REP 0ff DATE/ EVENT DESCRIPTION / COMP 3MENI MANUFACIURER M555 REPCRT TYPE CAUSE DESCRIPTION DOANE ARHotD 85808338 882975 $URVEILL ANCE TESTING REVEALED ONE OF TWO SQUARE ROOT CONVERIERS IN THE A OTHR INST SYS NOT E4D FR 5FTY 75 GIT 898875 PRM/RBM FLOW SIAS UNIT D To BE oui 0F CAtisRATION (5ET POINI 0F 6.667 VO IN57RUMENTATI e CONIROLS 883322 2-WEEK LTS VS 6.647). LOGIC INCLUDES AUCTIONEERING AND HIGN SIGN AL WOULD HAVE 8 M0 SUSCOMP Ni PROVIDED GE EEN EtIMINATED. OTHER CHANNEL WAS OPERABLE (50-33s/75-463. COMPONENT AILURE CAUSE SCODE NOT PROVIDED NO FACTURER SPECIFIED INSTRUMENT DRIFT. CALIBRATION WILL SE RECHECKED IN TWO WEEKS 10 CEIERMIN E IF DRIFT IS RECURRING. DUAdE ARNot0 05888338 862688 DURING HORMAL POWER OPERATION. THE A DRYWELL GASEOUS RADIATION RECORDER OTHR INSI SYS NO REOD FR SFTY SS-827/83L-0 872580 (RR 4379A) WAS FOUND DOWH5CALE AND WAS UNRESPONSIVE TO A SOURCE CHECK INSTRUMENTATI + CONTROL 5 838772 38-DAY PREVIOUSLY THE B MONITOR WAS FOUND INOPERABLE. FAltuRE OF THE A MONIIOR SENSOR /DET IOR/ ELEMENT GE PLACED THE PLANT IN A SEVEN DAY LCO IN ACCORDANCE WITH TECH SPEC 3.6.C. COMPONENT A! LURE 2. THE 10 DINE AND PARTICULATE MONITORING FUNCTIONS OF THE MONITOR WERE INSTRU NT 511LL OPERABLE. HD PREVIOUS DCCUPRENCES OF THIS NATURE HAVE BEEN RECORD TGM DE CTORS. INC. ED. THE CAUSE OF THE FAILURE WAS DETERMINED TO BE FAULIY RADIATION ELEMENTS (RE Sl82A AND B). BOTH HAVE BEEN REPL ACED AND ARE FUNCIIONING PROPERLY (RE 8882B OPERABLE 6-27 AND RE Sit 2A OPERABLE 7-96-80). 50lH ELEMENIS ARE TGM DETECIORS MODEL N187. NO FURTHER CORRECTIVE ACTIDH 15 PLANNED A i THIS TIME. EDWIN 1. HATCH-t 85480321 024475 F0tt0W TIP MACHINE C OPERATION. THE DETECTOR WAS WITHDRAWN TO THE STORAG OTHR INST SYS OT RE4D FR SFTY 75 Sti 022475 E CONTAINER. THE ISOLATION VALVE (SALL VALVE) FAILED TO CLOSE WHEN IHE VALVES 012379 l 2-WEEK DETECTOR REACHED II5 STORAGE LOCATION. THE SECOND ISOLATION VALVE. A $4 No SUSCO ONEHi PROVIDED GE UIS VALVE. WAS NOT OPERATED. INSTEAD THE SALL VALVE WAS MANUALLY CLOSED. COMPONEN FAILURE (50-328/1975-8) CAUSE JURCODE NOT PROVIDED GENE G ELECTRIC CD. A GE MODEL NO. It2C239tP001 TIP BAtt VALVE FAILED TO CLOSE BECAUSE SOME TIP CABLE LUBRICANI BECAME PACKED AROUND THE BALL VALVE PREVENTING II5 0 PERATION. THE BALL VALVE WAS REPLACED. EDWIN I. HATCH-1 05084328 110475 (ER 75-85) DURING MORMAL POWER OPERATION. SAMPLE LINE WAS ACCIDENTALLY I OTHR INST SYS H RE4D FR 5FTY 75 841 192775 50L ATED AT THE INT AKE STRUCTURE CUlilHG OFF FLOW 10 THE PH AND TEMPER A1U COMPONENT CD NOT APPLICABLE 013700 2-WEEK RE MONITORS. THIS CONDITION WA5N'T DETECTED UNTIL THE NEXT DAY RESULTING $U8COMPON NOT APPL!CA51E GE IN A MISSED TEMPERATURE SAMPLE PER 2.0.9. OF THE ENVIRONMENTAL TECH SPE C5. THE SAMPLE FLOW WAS RESTORED. PERSONNE RROR CAUSE BCODE NOT PROVIDED ITEM APPLICABLE PERSONNEL INVOLVED IN THE INCIDENT WERE MADE AWARE OF THE SITUATION. I It

I MA2 25, 3981 LER DUTPUT CN SWR COMPRESSED AIR SYSTEMS AND PAGE 6 OIHER INSTRUMENT 5) STEMS NOT REQUIRED FOR SAFETY FROM 1969 to THE PRESEHi OUIPUT $0RIED BY FACILITY AND EVENT DATE FACILITf/5YSTEM/

DOCKET NO./ ConPONENT/CDMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / CDNPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION EDWIN I. HATCH-1 05000321 052676 (76-46) DURING STEADY-STATE OPERATION. NORMAL SURVEILLANCE REVEALED THAT OTHR INST SYS NOT QD FR SFTY 76 OlL 062476 THE CALIBRATION OF INSTRUMENis 148-N008 A85. N009A88. R608. R609. M010A INSTRUMENTATIO CONTROL 5 985573 30-DAY

83. AND R622A88 HAD DRIFTED JUST OUTSIDE THEIR TOLER ANCES. No RE DUNDANT NO SU8 COMP 0 i PROVIDED GE SYSTEMS EXIST AND THIS 15 NOT A REPETATIVE OCCURRENCE. THE INSTRUMENTS W COMPONENT

.A LURE ERE RECALIBRATED 10 BRING THEM WITHIN TOLERANCE. CAUSE 5 ODE NOT PROVIDED GENERA LECTRIC CD. COMPONENT FAILURES THE GE MFG. CO. MODEL 555 AND 556 PRES $URE TRANSMlliE RS HAD DRIFTED QUI 0F CALIBRATION. THE PRES $URE TRANSMITTER $ WERE RECALI BR ATED AND RETURNED TO SERVICE. EDWIN I. HATCH-8' 05008329 080977 (77-58) WHILE PERFORMING A ROUTINE TEST PER PROCEDURE HNP-t-522. R3. ON OTHR INST SYS NOT PQD FR SFiY 77 03L 088777 PRESSURE TR ANSMITTERS C32-N005 A. B. 8 C OF THE FEEDWATER CONTROL SYSTEM. INSTRUMENTATION CONTROLS 018651 30-DAY 11 WAS FOUND THAT THE HEAD CORRECTIDH WAS DELETED FROM THE PREVIOUS CAL N0 SUSCBMPON PROVIDED GE 10 RATION. INSTRUMENTS RECALIBRATED. EVENT WAS A NON-REPETITIVE OCCURRE PERSONNEL @R R HCE. CAUSE 5 E ODE NOT PROVIDED GENER LECTRIC CO. TECHNICI AN INADVERTENTLY DELETED THE HEAD CORRECTION FROM THE PREVIOUS C ALIBRATION OF GENERAL ELECTRIC CD. MODEL $55 PRE 55URE TRAN$ Miller. TECH MICIAN5 WERE IN51RUCTED TO FOLLOW PROCEDURES MORE CAREFULLY. EDWIN !. NATCH-t 85000329 098577 (77-68) ON 9/15/77 WITH REACTOR AT STEADY STATE POWER OF 2802 MWT HPCI T OTHR INST SYS NOT QD FR 5FTY 77 O IL 180577 URRINE EXHAUST DIAPHRAGM PRES 5URE SWITCH E41-Nel2C FOUND OUT OF T.S. LIM INSTRUMENIATIO CONTROLS 820025 30-DAY ITS (IABLE 3.2-2). DURING SURVEIL SWITCH FOUND TO TRIP AT 25.6 PSIG RAT NO SUSCOMPO i PROVIDED GE HER THAN T.S. CRITERIA 0F </- It + 13.8 PSIG HEAD CORRECTION. COMPONENT LURE CAUSE ODE NOT PROVIDED STATIC-ING CAUSE OF DEVIATION WAS SWITCH SETPoINT DRIFT OF STATIC-0-RIPS SWITCH 5/N 71-2-640. HHP-t-5240 PERFORMED TO BRING SWITCH ACTUATION INTO TOLERANC E. EDWIN I. HATCH-85000329 098577 (77-67) OH 9/15/77 WITH REACTOR AT STEADY STATE POWER OF 2002 MWT HPCI T OTHR INST 5 NOT REQD FR SFTY 77 GIL 180577 URBINE EXHAUST DIAPHRAGM PRESSURE SWITCH E48-N012A FOUND OUT OF T.S. LIM INSTRUME ATION

  • CONTROL 5

$20026 30-DAY ITS (TAGLE 3.2-2). DURING SURVEILLANCE SWITCH FOUND 10 TRIP Al 24 PSIG NO SU MPONENT PROVIDED GE RATHER THAN AT T.S. CRITERIA 0F </- It + 13.8 PSIG HEAD CORRECIION. ~ COMPO HI FAILURE CA% E SUSCODE NOT PROVIDED SLATIC-0-RING CAUSE OF DEVIATION WAS SWITCH SETPOINT DRIFT OF STATIC-0-RING SWITCH 5/N 78-2-635. HNP-1-5240 PERFORMED TO BRING SWITCH ACTUATION INTO 10LERANC E. "l I

.l P MAO 25, 1989 LER DUTPUT ON BWR COMPOE55ED AIR SYSTEMS AND PAGE 7 0THER IN51RUMENT SYSTEMS NOT REQUIGED FOR SAFETY FROM 1969 TO THE PRESENT GUIPUT SORTED BY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ COMPONENT / COMPONENT SUSCODE/ LER 40./ . EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION EDWIN I. NATCH-1 85000329 118277 ON 98/2/77 WITH THE REACTOR AT A STEADY STATE PDWER OF 2417 MWI THE HPCI OTHR INST SYS N RE4D FR 5FTY 77-8BI/03L-0 113077 TURBINE EXHAUST DIAPHRAGM PRESSURE SWITCH E48-NSI20 WAS FOUND 10 BE AT INSTRUMENTATI + CONTROLS 820005 30-DAY A SETPOINT IN VIOLATION OF IECH SPEC LIMIis (TABLE 3.2-2 REF. 882). DUR SWITCH GE ING NDRMAL SURVEILL ANCE, PRES 5URE SWITCH E41-N8120 TRIPPED Ai 27.8 PSIG COMPONENT AILURE INSIEAD OF 21.8 + 1 PSIG AS SPECIFIED IN TECH SPEC. REDUNDANT SYSTEMS WE ELECTRI. L RE OPERABLE. THIS WAS A NON-REPEllilVE OCCURRENCE FDR SWITCH E48-Mel20. STAi!CA- -RING / THE DEVI ATION WAS CAUSED BY A SWITCH SETPOINT DRIFT OF ST ATIC-O-RING SWI TCH 5/N 71-2-637 CAT. 06M-AA2-X. TO CORRfCT THE SETPOINT VIOLATION. THE STATIC-0-RING PRES 5URE WAS RECALIBRATED PER HNP-t-5240 (STATIC-0-RING PR E55URE SWITCH). EDWIN I. HATCH-9 05088321 881477 WHILE PERF. NORMAL SURVEIL. DURING STEADY ST ATE OPERATION SWITCHES E41-N I OTHR INST SYS i RE4D FR SFTY 77-883/03L-0 120777 601 A & B (HPCI EQUIPMENT ROOM DELTA T) SEIPOINIS WERE F00MD 10 SE OUTSI INSTRUMENT OM + CONTROLS 820014 38-DAY DE OF ALLOWED TOLERANCE LISTED IN T.S. TABLE 3.2-2 REF. 9. ALARM CONDli SW!iCH GE IONS SHOULD HAVE OCCURRED WITH 40 F DIFFERENIIAL TEMP. BUT FOUND AT 59 F COMPONE FAILURE 8 58 F RESPECTIVELY. NOT ANY SIGNIFICANT OCCURRENCES THAT TSOE PLACE A INSTR ENT 5 RESULT OF EVENT. FIR 5T-TIME OCCURRENCE. TRAN TION. INC. EVENT DUE TO INSTRUMENT DRIFT OF SW!iCHES. SWITCHES (E41-N689 A 8 B) WE RE MANUFACTURED BY TRAN5MATION. INC., M0bfL N0 $1064. SERIAL N05. 32724 i 8 35375 RESPECTIVELY. PROBLEM CORRECTED BY RECALIBRATION OF 5 WITCHES PE R PROCEDURE HNP-t-5235 TO BRING SE1 POINT BACK IN TOLERANCE. EDWIN 1. HATCH-t 85008329 192777 DURING NORMAL SURVEILLANCE TESTING. WITH THE RX Ai STEADY STATE POWER. T OTHR INST SYS OT RE00 FR SFTY 77-087/03L-8 122077 HE RX SHROUD LEVEL SWITCH B21-N037 AND ITS ASSOCIATED RECORDER B24-R685 i INSTRUMENT ION + CONTROLS 820215 30-DAY WERE FOUND INOPERABLE. THE SWITCH WAS REPLACEO AND FUNCIIONALLY TESTED SWITCH GE Sail 5FACTORILY PER RX SHROU LEVEL INSTRUMENT FUNCTIONAL 1[Si (HHP-t-38 COMPON FAILURE 76). AT THE TIME OF THE EV5 i THE REDUNDANT IN51RUMENT B21-N836 WAS AWA NATU L END OF LIFE ILABLE AND OPERABLE. YARW Y CORP. CAUSE OF EVENT WAS A FAILURE OF THE YARWAY SWITCN. COMP 0NEhi WAS REPLAC 6 ED BY HEW YARWAY SWITCH (5/N 34106. MODEL 04488tC). NEW SWITCH WAS FUNC . TIONALLY TESTED SATI5F ACTORILY 8 PL ACED INio SERVICE. RECORDER 82 8-R6 55 WAS OPERABLE HOWEVER IT IS FED BY YARWAY B21-NO37 WHICH HA5 INOPERABLE. THUS MAKING THE RECORDER INOPERABLE UMTIL YARWAY SWITCH WAS FIXED. 05008321 858278 DURING STEADY STATE OPERATION STAFF WAS INFORMED BY M555 5UPPLIER THAT I EDWIN 1. HATCH-1 OTHR INST SYS NOF'RE4D FR 5FTY 78-0 26/S I T-4 058578 TS QUALITY CONTROL PERSONNEL HAD DISCOVERED AN ERROR IN IHE PROCESS COMP IN5iRUMENTAIRON + CONTROLS 821348 2-WEEK UIER DATA BASE WITH A POTENTIAL FOR INCREASING THE UNCERTAINIY ASSOCIATE COMPUTAT PdN MODULE GE D WITH THE THERMAL HYDRAULIC PARAMETERS BY LESS THAN 4 PERCENT. THIS WA ~ DESIGP (ABRICAi!0N ERROR 5 CONSIDERED TO BE AN R0 PER TECHNICAL SPECIFICATION 6.9.t.2.A.9. MA WACTURING N0 YWELL CORPORei!ON PROCESS COMPUTER ARRAYS WERE NOT PROPERLY UPDATED TO REFLECT DESIGN OF M i EW FUEL. OPERATING DATA WAS REVIEWED 10 ENSURE THAT NO SAFETY LIMIT WAS VI3 LATED AND DAILY CHECKS ARE BElHG MADE 10 VERIFY COMPLIANCE WITH SAFE TV LIMIis. GE HAS REGENERATED THE DATA ARRAYS TO REFLECT ACTUAL FUEL DE SIGN AND THEREBY REMOVE EXTRA UNCERIAINTY. I 1 i

A MA2 25. 1989 LER OUTPUT ON BWR CDNPRESSED AIR SYSTEMS t.ND PAGE & OTHER IN51RUMENT SYSTEMS NOT REQUIRED FOR SAFETY FROM 8969 10 THE PRE 5fMI OUTPUT 50RIED BY FACIL!iY AND EVENT DATE FACILITY /5Y5 FEM / DOCKET NO./ CGMPONENT/CDMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SURCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / CDMPONENT MANUFACTUFkR M555 REPORI TYPE CAUSE DESCRIPTION EDWIN I. HAICN-l so 05800328 080579 WHILE PERFORMING NORMAL SURVEILL ANCE PROCEDURE HNP-t-3453. REACIOR FRE55 OTHE INST SYS RE0D FR SFTY 79-860/03L-0 880779 URE RECIRC PUMP IRIP INSTRUMENT FUNCTIONAL TEST AND CALIBRATION, AUXILLA REtAYS 826535 30-DAY RY RELAY R21-K430 FAILED TO ACTUATE. REDUNDANT TRIP CIRCUII. 328-K43A. SWIICHG . AUXILIARY GE

3. ARD C DPERAIED CORRECILY. THIS REL AY TRIPS INE B RECIRC PUMP ON HIGN COMPO FAILURE REACTOR PRESSURE. THERE WERE NO PREVIOUS EVENIS OF A SIMIL AR NATURE.

ELE ICAL THE PUBLIC HEALTH AND SAFETY WERE NOT AFFECTED. AGA) At RELAY CO. THE CAUSE OF THE EVENT WAS AN OPEN RELAY CGIL. THE RELAY WA5 REPLACED A ND THE FUNCTIONAL TEST SUCCES5 FULLY COMPLETED. EDWIN 1. HAICH-l 05000325 062379 WHILE SHUIDOWN FOR REFUEL 1HG & PERFORMING HANGER SURV IN RESPONSE TO IE CDMPRESSED AIR SYSTEMS + CONT 79-065/ SIT-0 883879 BULLETIN 79-14 IT WAS DISCOVERED THAT A SECTION OF PIPING IN PLANI IN51 MANGERS.5UPPORTS,5H0CK SUPPR55 026731 2-WEEK RUMENT AIR SYSIEM (P52) WAS NOI SEISMICALLY SUPPORTED PER ORIGlHAL DESIG HANGERS ./ GE N. FURTHER ANALYSIS SY ARCHITECT ENG MAS REVEALED THAT SINCE CONTROLLING DESIGM/ FABRICATION ERROR LOAD FOR SUPPORT WAS FOR SEISMIC CONCERNS ONLY & SINCE NO SEl5MIC EVENT CONSTRUCTION /INSTALLAi!ON HAS DCCURRED. PIPING WAS NOT DEGRADED. THIS 15 A REPETITIVE OLCURRENCE. SEE LER 50-366/1978-02. BECHTEL' CORP. DURING INIIIAL INST ALL ATION OF THE PIPING AND ITS A550CIAIED H ANGERS. T / HE AFOREMENIIONED HANGER WAS INADVERTENTLY LEFT OFF. THE PR08 TEM WAS C ORRECTED BY INSTALLING A PIPE HANGER A5 CALLED FOR SY ORIGINAL DESIGN. EDWIN 1. HATCH-1 05008321 199379 WHILE PERFORMING HMP-t-3480. RCIC STEAM LINE FLDW FUNCTIONAL TEST AND CA OTHR INST SYS NOT RE0D FR SFiY 79-085/03L-0 182579 LIBRATION. AT STEADY SIAIE PDWER OPERATION. IN51RUMENI IE58-N017 SWIICH INSTRUMENTATI + CONTROLS 827223 30-DAY CONIAC15 NO. 2 FAILED To ACTUAIE WIIHIN TECH SPECS LIMITS (<*l82 + 16 IN SWITCH GE . H2O HEAD CORRECTION). THE SWITCH ACTUATED AT 289 IN. H20. THERE WAS OTHER NO EFFECT ON SAFE PLANT OPERATION SINCE IH51RUMENI SE51-Nel8 WAS OPERAII NOT AFF ICABLE NG AND AVAILABLE FOR THE SAME FUNCTION. THIS 15 A RE-0CCURRING PRotLEM ITE -WOT APPLICABLE AS REPORTED ON LER 77-98. INSTRUMENT M9tFUNCTION WAS ATTRIBUTED TO INSTRUMENT DRIFI. IE58-NSIP WA 5 CALIBRATED PER HNP-l-5202 AND SET TO THE CORRECT SETPOINT. FUNCTIDMAL TEST AND CALIBRATION PROCEDURE HNP-t-3418 WAS PERFORMED AND COMPLETED 5 Ail 5FACTORILY. EDWIN I. HATCH-1 05000320 072440 WITH UNIT I IN COLD SHUTDOWN FOR REPAIR OF DRYWELL COOLERS. A REVIEW OF COMPRESSED AIR SYSTEM $"(' CONT 88-086/087-0 080480 DATA FOR IES 79-14 SY THE AE REVEALED THAT A SUPPORT (PS2-F582-H784) WAS ~ HANGERS.5UPPORTS. NdCK SUPPR$5 031845 2-WEEK MISSING ON THE INSTRUMENT AIR SYSTEM AND THAT ibE PIPING INTEGRITY COUL SUPPORIS GE D NOT BE ASSURED IN A SEISMIC DBE. PIPING FAILURE WOULD HAVE RENDERED 4 DESIGN /FABR}CA ION ERROR VALUES FOR POSI-LOCA HYDROGEN WENIPNG OF THE CONTAINMENT IMOPERAllVE. THERE WERE NO EFFECIS ON PUBLIC HEALTH AND SAFEIV. THIS IS A REPETIIIVE DESIGN s' EVENis SEE LER 50-329/1979-065. B E CHI E, pef 0RP. THE INITIAL SMALL BORE PIPING $UPPORT DE5IGN WAS DONE U$1HG THE COOKBOOK METHOD AND DID NOT RELY ON COMPUTER ANALYSIS. THIS SUPPORT WAS NOT INS TALLED DUE TO AN ERROR IN IMPLEMENTING THIS METHOD OF DESIGN. A NEW HAN GER DESIGN WAS SUPPLIE3 BY THE AE. THE NEW HANGER WAS INSTALLED PRIOR T 0 STARTUP OF THE UNIT. ~ is e

.I MA3 25. 1981 LER CUIPUI EM BWR COMPRESSED AIR SYSTEM 3 AND P&GE 9 O T *..R IM51RUMENT SY5f EMS NOT REQUIRED FOR SAFETY FROM 1969 10 THE PRESENT OUTPUT 50RIED BY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ COMPONENT /CDMPOhENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONTROL No./ REPORT DATE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION EDWIN I. NATCN-2 85808366 182678 WHILE REVIEWING DAT A SHEETS OF UNIT 2 LCO IN51RUMENTS COVERED BY PROCEDfa OTHR INST SYS NOT REQD FR SFTY 78-859/03L-1 122278 RE HHP-832. II WA5 DISCOVERED THAT THE FOLLDWING 32 INSIRuMENIS HAD EXC CDrtPONENT CODE DF" APPLICABLE 822750 38-DAY EEDED THEIR CALIBRATION INTERVAL 2828-R687. 2831-R628 A-B. 2C32-E683. 2 SURCCMPONEN i APPLICABLE GE C32-K685 A-D. 2C32-M883 A-D, 2C32-H888. 2C32-N889 A-D. 2C32-R689. 2C49-N PERSONNEL OR 80s, 2C41-R$81. 2C41-R882. Ell-N8878. 2E ll-R 88 3C. 2E2 9-R6.8 88. 2E48-K688. MAINTEp CE 8 REPAIR PERSONNEL 2E41-k648-1 2E51-R688-1 2G38-K688 2G38-R687. 2P48-R3tlA. AND 2P41-R3 ITEMEDI APPLICABLE tlc. / THE DEVIAIION WAS CAUSED BY THE FAILURE OF PERSONNEL TO MAINIAIN ACCURAI E CALIBRATION RECORDS. THE INSTRUMENTS WERE SCHEDULED FOR CALIBR ATION A ND ALL CALIBRATION 5 WERE COMPLETED ON 82/14/78. PERSONNES. WERE ADVISED OF THE IMPORT ANCE OF ACCUR ATE RECORDS AND A SYSTEM HAS SEEN DEVISED TO P REVENT REOCCURRENCE. 85888366 123178 WITH THE UNIT IN COLD SHUTDOWN WHILE PERFORMING HNP-2-3456. RPS M-G SET EDWIN 1. HATCH 79-882/03L-8 881279 OVERVOLTAGE. UNDERFREQUENCY. AND UNDERVOLIAGE FISC. THE OVERVOLTAGE TRIP OTHR INST SYS T REQD FR SFTY RELAYS 823454 38-CAY SEIPOINT FOR RPS M-G SET "B" WAS FOUND Ai 133.5 WAC. THE EXPECTED SEIP REED GE OINT PER HHP-2-3456 15 130 +/- t VAC. THE TECHNICAL SPECIFICATION LIMIT OTHER 15 < / = 132 WAC (4.8.2.1.2.B.9). NO SIGNIFICANT EVENTS DCCURRED A5 A CONS NOT PLICABLE EQUEhCE. THERE ARE NO SIMILAR OCCURRENCES. GE @ AL ELECTRIC CD. THE OVERVOLTAGE TRIP SETP0!NT WAS FOUh3 TOO HIGH DUE TO SETPOINT DRIFT. ( ADDIIIDHALLY THE SETPOINT CALLED FOR IN THE SYSTEM PRE-0P TEST WAS 832 VAC WHICH IS EQUIVALENT TO THE TECHNICAL SPECIFICATIONS LIMIT. THE SEIP OINT WAS RECALIBRATED SATI5FACTORILY PER HNP-2-3456. 85088366 888379 WITH THE UNIT IN COLD SHUTDOWN WHILE PERFORMING HNP-P-3456. RP5 M-G SET EDWIN !. HATCH-2 79-885/83L-8 818779 OVER VOLTAGE. UNDERFREQUENCY. AND UNDER VOLTAGE FISC. THE UNDERfREQUENCY OTHR INST SYS h0T R D'FR SFTY RELAYS 825100 38-DAY TRIP SEIPOINT WA5 FOUND AT 54.8 H2 FOR RPS M-G SET "A". EXPECTED SEIP0 CONTROL. SEALE GE INT PER HHP-2-3456 15 58 +/- 8.5 HZ. THE TECHNICAL SPECIFICATION LIMIT DEFECTIVE PR0fEDURES 15 >/= 57 HZ (4.8.2.1.2.B.3). NO SIGNIFICANT EVENTS OCCURRED AS A CONSE NOI APPLIC SLE QUENCE. THERE ARE ho 5IMILAR OCCURRENCES. GENERAL E TRIC CO. THE UNDERFREQUENCY TRIP SE1 POINT WA5 FOUND 100 LOW BECAUSE THE PRE-OP TE ST OH THE SYSTEM HAD CAUSED IT TO BE SET 10 54 H2. THE SURVEILLANCE TES T. HNP-2-3456. CONTAINS A SETPolNT MORE CONSERVATIVE THAN TECHHICAL SPEC IFICATIONS. NO PROCEDURE REVISION 15 NECESSARY. THE SEIPOINI WAS ADJUS TED PER HNP-2-3456. EDWIN I. HATCH-2' 85080366 888379 WITH THE UNIT IN COLD SHUTDOWN WHILE PERFORMING HNP-2-3456. RPS M-G SET OTHR INST 5 5 NOT REQD FR 5FTY 79-007/03L-8 881779 OVERVOLTAGE. UNDERFREQUENCY. AND UNDERVOLTAGE FTSC. THE UNDERVOLTAGE TR RELAYS 825182 38-DAY IP DN RPS M-G SET "A" WAS FOUND AT 59.8 VAC. THE EXPECTED SEIPOINI PER 5WII AR. PROTECTIVE GE HNP-2-3456 15 lit VAC +/- 8. THE TECHNICAL SPECIFICATION LIMIT 15 >/= 1 DESI FABRICATION ERROR 88 VAC (4.8.2.1.B.23. (SIMILAR EVEN4. 79-2 FOR M-G SET B). DG5IGN GfMERAL ELECTRIC CO. UNDERVOLTAGE SETPOINT WAS TOO LOW SECAUSE THE BREAKER 15 DESIGHED 10 TRI P Ai 38% 10 60% OF RATED VOLTAGE (120 VAC3. IT 15 NOT CAPABLE OF MEETIN G TECH. SPEC. REQUIREMENTS. THE UNDERVOLTAGE TRIP CIRCUIT IS BEING STUD IED 10 FIND A FIX. IT IS PART OF A G. E. MODEL TFJ 226 175 CIRCUIT BREAK ER. A FOLLOW-UP REPORT WILL BE SUBMITTED. II

11 MAR 25, 1989 LER Duirui ON BWR COMPRESSED OIR SYSTEMS AND PAGE 14 OIMER INSTRUMENT SYSTEMS NOT REQUIRED F0k 5AFETY FROM 1969 TO THE PRESENT DUIPUT 50RIED BY FACILITY AND EVENT D4TE FACILITY /5YSTEM/ DOCKET NO./ i CDNPONENT/CDMPONENT SUSCODE/ LER NO./ EVENT DATE/ j CAUSE/CAUSE SUSCODE/ CONIROL MO./ REPORT DATE/ EVENT DESCRIPi!ON/ l COMPONEN! MANUFACTURER M555 REPORI TYPE CAU5E DESCRIPTION EDWIN I. HAICN-2 85808366 012779 WITH THE UNIT IN COLD SHUTDOWN WHILE PERFORMING HNP-2-3456. RP5 M-G SET OTHR INST 5 T RE4D FR SFIY 79-084/03L-0 020779 OVERVOLTAGE. UNDERFREQUENCY, AND UNDERVOLTAGE FI8C. INE UNPERFREQUENCY T RELAYS 825031 30-DAY RIP SETPOINT WAS FOUND At 54.4H2 FOR RPS M-G SET *B". THE EXPECTED SEIP SEALED GE DIMI #ER NNP-2-3456 15 58 +/- 0.5 H2. THE TECHNICAL SPECIFICATICM LIMli CON C TIVE PAOCEbORES 15 >/s 57 H2 14.8.2.1.B.3). NO SIGNIFICANT EVENTS OCCURRED AS A CONSEG Of APPLICABLE UENCE. REFERENCE SIMILAR LER 79-005. GENERAL ELECTRIC CO. THE UNDERFREQUENCY TRIP SETPOINT WAS FOUND TOO LDW 3ECAUSE THE PRE-CP TE Si DN THE SYSTEM HAD CAUSED IT 10 SE SET TO 54 H2. THE SURVEILLANCE TES

1. NNP-2-3456. CONTAINS A SEIPOINT MORE CONSERVATIVE THAN TECH. SPECS.

NO PROCEDURE REVISION IS NECESSARY. THE SEiPOINI WAS ADJUSIED PER HNP-2 -3456. EDWIN !. HATCH-2 05888366 012779 WITH THE UNIT IN COLD SHUIDDWN WHILE PERFORMING HNP-2-3456. RPS M-G SET OTHR INST SYS NO EQD FR SFTY 79-015/03L-0 820779 OVERVOLTAGE. UNDERFREQUENCY. AND UNDERVOLTAGE FISC. THE UNDERVOLTAGE TR RELAYS 825032 38-DAY IP ON M-G SET "B" WAS FOUND AT 40 VAC. INL EXPECTED SETPOINT PFR HHP SWITCHGEA. PROTECTIVE GE 3456 15 tte +/- t WAC. THE TECHNICAL SPECIFICATION LIMIT IS >/s 988 UAC DESIGN /p RICATION ERROR (4.8.2.1.B.2). HO SIGNIFICANT EVENIS OCCURRED A5 A CONSEQUENCE. REFER DESIM ENCE SIMILAR LER 79-887. GENERAL ELECTRIC CO. THE UNDERVOLTAGE SETPOINT WAS 100 LDW BECAUSE THE BREAKER IS DESIGHED TO TRIP Ai 30% TO 604 0F RATED VOLTAGE (120 VAC). If IS NOT CAPABLE OF HE Ei!NG TECHNICAL SPECIFICATIONS REQUIREMENIS. THE UNDERVOLIAGE TRIP CIRC Uli IS BEING STUDIED TO FIND A FIX. CIRCulf BREAKER IS G.E. MODEL IFJ 2 26 175. A FOLEDW-UP REPORT WILL BE SUBMITTED. EDWIN I. HATCH-2 85000366 012779 WITH THE UNIT IN COLD SHUTDDWN WHILE PERFORMING HNP-2-3456. RPS M-G SET 01NR INST SYS NOT RESS/FR SFTY 79-St&#83L-0 020779 OVERVOLTAGE. UNDERFREQUENCY. AND UNDERVOLTAGE FT&C. INE OVERVOLTAGE IRIP RELAYS 825033 30-DAY SETPOINT FOR RP5 M-G SET "B" WAS FOUND AT 825.6 VAC. THE EXPECTED SEir REED s' GE OINT PER HNP-2-3456 IS ISO +/- t VAC. THE TECN. SPEC. LIMIT IS </a 132 I GTHER /' VAC I4.S.2-1.B.93. NO SIGNIFICANT EVENIS OCCURRED A5 A CONSEQUENCE. DR IFT WAS IN CONSERVATIVE DIRECT 10N. REFERENCE SIMILAR LER 79-082. l NOT APPLICABLE GENERAL ELECTRIC CO. THE OVERVOLT AGE TRIP SETPOINT WAS FOUND 100 LOW DUE TO SEIPOINT DRIFT. THE SEIPOINT WAS RECALIBRATED SATI5FACTORILY PER HNP-2-3456. EDWIN I. HATCH-2 05008366 000979 DURING REACTOR STARTUP AND HEATUP FROM COLD CONDITION THE DRYWELL PRE 55U OTHR INST SYS HM REQD FR SFTY 79-111/43L-8 198979 RE EXCEEDED.75 PSIG LIMIT OF TECH. SPEC. 3.6.1.6. THE HIGHEST DRYWELL COMPONENT CODE NO T APPLICAOL E 027220 38-DAY PRE 55URE REACHED WA5 0.83 PSIG. PREVIOUS OCCURRENCE IS NOTED IN LER 79-SU800MPONENT NJT APPLICABLE GE 54. THERE WERE NO EFFECTS UPON THE PUBLIC HEALTH AND SAFEIY DUE TO THIS DESIGN / FABRICATION ERROR EVENT. DE SIGN / ITEM NDI APPLICABLE AT BEGINNING OF 5HIFT. DRYWELL VENTED VIA SBGT SYSTEM UNill " PRIMARY CON / TAIMMENT HI/ LOW PRESS." ALARM RECEIVED. REAC10R STARTUP & HEATUP CONilN UED 4 HUMERIOUS SPURIOUS ALARMS BEING RECEIVED. DURING THIS TINE " PRIMA RY CONTAINMENT HI/ LOW PRESS." ALARM CLEARED WHEN ALARM CAME BACK ON AT. 65 PSIG. ACKNOWLEDGE UNKNOWING ALARM TO BE CHANGED FROM DULL 10 2 ALARMS I (

MAR 25. 1985 LER OUTPUT ON BWR COMPCESSED AIR SYSTEMS AND PAGE lt OTHER INSTRUMENT SYSTEMS E01 REQUIRED FOR 5AFETY FROM 1969 IO THE PRESENT GUTPUI 50RIED BY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCRET NO./ COMPONENT / COMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTIDH/ CDMPONENI MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION EDWIN 1. HATCH-2 85808366 433880 WITH THE REACTOR IN COLD SHuiDOWN THE TRIAXIAL PEAK RECORDING ACCELERBME INST SYS N0T fE0D FR SFTY as-833/03L-0 843588 TERS ON INE RE ACIOR PEDEST AL AND THE FEEDWATER INLET LINE WERE NOI CALIB OTHR f INSTRUMENTATIpH + CONIROLS 830768 38-DAY RATED BEFORE 3/30/80 AS REQUIRED BY AMENDMENT NO. 12 0F THE UNIT 11 IECH RECORDER GE SPEC 5. THERE WAS HO EFFECT ON SAFE PLANT OPERATION OR UPON PUBLIC HEAL CottPONENT IAILURE TH OR SAFETY. INSTRQMEHi ENGDAHL ENTERPRISES r CALIBR ATIDHS WERE ST ARTED PRIOR 10 THIS DATE BUT BECAUSE OF INSTRUMENT F ,f AILURES THE CALIBRATION COULD N01 BE COMPLETED. THE IN51RUMENTS WERE RE TURNED 10 THE VENDOR FOR REPAIR. THEY ARE AN ENGDAHL MODEL PAR 400. A SPECIAL REPORT WILL BE SUBM!iTED IF THEY ARE NOT REPAIRED WITHIN 30 DAYS e, e . UMIT I DOES NOT HAVE THIS TYPE OF INSTRUMENT. EDWIN I. HATCH-2'f 85008366 042888 DURING REACTOR STARTUP. THE CMFLPD WAS CALCUL ATED TO BE 70.3X. CORRECil OTHR INST SYS'hGI REQD FR 5FTY 88-875/03L-S 954580 WE ACIION WAS TAKEN BUT DID NOT LOWER THE CMFLPD TO ALLOW ADJUSIMENT OF CDitPONENT, CODE NOT APPLICABLE 831185 30-DAY APRMS PER TECH SPEC 5 3.2.2. PREPARATIONS WERE MADE TO REDUCE REACIOR PO SUSCOMPONENT NOT APPLICABLE GE WER TO LESS THAN OR EQUAL TO 25X WITHIN THE NEXT 4 HOURS. BUT IHE PROBLE PERSONNEL ERROR M WAS CORRECTED BEFORE ANY SIGNIFICANT REDUCTION. THERE WERE NO EFFECIS OTHER ON PUBLIC HEALTH AND SAFEIV. THIS IS A REPETITIVE EVENT. ITES~NOT APPLICABLE / THE HIGH CMFLPD WAS DUE TO LOWER THAN EQUILIBRIUM XENON DISTRIBUTION DUR ING STARIUP. THE INIllAL CORRECTIVE ACIION FAILED BECAUSE OF INEFFECIIV E CONTROL R0D ADJUSTMENis. PER50HHEL WERE FAMILIARIZED WITH BEITER. M02 E EFFECTIVE CORRECTIVE ACTIONS 10 TAKE IN SIMILAR SliUATIONS TO PREVENT ,e, RECURRENCE. 05000366 182680 ON 11-25-80, WITH UNII 2 IN REFUELING. AN LLRT BY PROCEDURE HNP-2-3952 W EDWIN 1. HATCH-2 40-158/03L-0 128980 A5 PERFORMED ON THE DRYWELL PNEUMATIC RETURN ISOLAll0N VALVE 2P70 FS20. COMPRESSEDAIR3YSTEMS+ CONT 833424 38-DAY CH 19-26-80. IHE LLRT COORDINATOR REVIEWED THE DATA IN WHICH THE WALVE VALVES CHECX / GE WAS FOUND TO BE-LEAKING AT 6589 ACCM. THIS LEAK AGE COULD CAUSE THE.68 COMPONENT, FAILURE OVERALL ALLOWABLE LEAKAGE LIMIT OF TECH. SPEC 5. 3.6.5.2.5.1 10 BE EXCEED MECHANJCAL ED. THIS IS A REPETITIVE OCCURRENCE - SEE LER 50-366/1980-851. THERE W ROCKWELL MANUFACTURING CO. ERE NO EFFECIS ON PUBLIC HEALTH OR SAFETY DUE TO THIS EVENT. THE LEAKAGE WAS DUE 10 SCRAICHES ON THE SEAT OF THE VJLVE WHICH WERE PRO BABLY DUE TO THE VALVE CLOSING ON DEBRIS. THE VALVE SEAT WAS POLISHED i 0 REMOVE THE SCRATCHE5s THEN A SUCCES5FUL RETEST WAS PERFORMED BY LLRT P ROCEDURE HHP-2-3952. THE RETE 51 LEAKAGE OF THE DRYWELL PHEUMATIC REIURN ISOLATION VALVE 2P70-F020 WAS 0 ACCM. 05880333 022275 DURING SURVEILLANCE TESTING. IRM D READ LOW WHEN TEST SWITCH WAS PL ACED FIT 2 PATRICK-1 75 99T 830375 AT 125 AND TRIP POINT. TEST CIRCUIT WAS REPAIRED 10 GIVE PROPER SIGNAL F OTHR INST SYS NOT RE00 FR SFiY INSTRUMENTATION #' CONTROLS 012278 2-WEEK OR TEST PURPOSES. FAILURE WAS NOT IN THE SAFETY SYSTEM BUT IN THE IEST C HG SURCOMPONENT PROVIDED GE IRCUIT. THE IRM OPERAIED SAi!SFACTORILY. THEREFORE THIS 15 HOT AOR BUT C ~ COMPONENT F ATLU*E LOSES OUT PRELIM!HARY REPORT. (AO-75-23) CAUSE SUBdODE NOT PROVIDED NO MAN ACTURER SPECIFIED TEST CIRCUIT INPUT SIGNAL WA5 ERROMEOUS. I ?E

il MAR 25, 1988 LER OUTPUT ON BWR COMPRESSED AIR SYSTEMS ACD PCGE 12 OINER INSTRDMENT SYSTEMS NOT REQUIRED FOR SAFETY FROM 1969 10 THE PRESENT GuiPUT SORTED BY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKEI NO./ COMPONENT / COMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SU8 CODE / CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER NS$5 REPORI TYPE CAUSE DESCRIPTION FITZPAIRICE-t 85888333 042476 (76-16) ouRING SURVEILLANCE TESTING. SI-tC (PRIMARY CONTAINMENI VALUE EX OIHR INST SYS NOT REON FR SFTY 76 StL 852476 ERCISE) A FUSE SLEW ON 27 50V 1238 DUE TO A DEFECTIVE $0LEN0!D. THE VALV INSTRUMENTATION + CONTROLS 484687 30-DAY E 15 A SAMPLE %IREAM 15CLATING VALVE. VALVE WAS PLACED IN 150LAIED CONDI NO SUSCOMPONENT PROVIDED GE TION, THUS SATISFYING TECHNICAL SPECIFICATIONS. COMPONENT FAILURE CAUSE SUSCODE NOT PROVIDED AUTDMATIC SWITCH CO (ASCO DEFECTIVE SOLENOID WHICH WA5 REPLACED. MILL 510NE-l 05850245 872177 (77-22/3L) DURING NORMAL OPERATION. A BELLOWS LEAKACE ALARM WAS RECEIVED OTHR INST SYS NOT ACQD FR 5FTY 77 03L 081977 IN THE MAIN CONTROL ROOM INDICATING THAT BELLDWS OF A TARGET ROCK SAFET OTHER COMPonENJk' 018626 30-DAY V/ RELIEF VALVE HAD FAILED. A PLANT SHUIDOWN WAS MADE DUE 10 POSSISLE L0 SUSCOMPONENI' HOT APPLICABLE GE $5 0F THE SAFETY FUNCTION OF THE WALVE, REPLACED FAULTY CABLE AND TESTED COMPONENT FAILURE VALVE. CAUSE SUSCODE NOT PROVIDED KERITE CO, 2 CONDUCTOR. 884 AWG COPPER WITH INSULATION LEVEL OF I KILOVO KERITE CO., THE Lt. j THE CAUSE OF THE OCCURRENCE WAS ATTRIBUTABLE TO A SHORT CIRCUIT BETWEEN THE WIRES CONNECTED TO THE PRESSURE SWITCH WHICH SENSES BELLOWS LEAKAGE . CABLE DEGRADATION WAS EVIDENT. MILLSTONE-1 85008245 880677 (77-24/3L) DEGRADATIDH OF THE FWCI SYSTEM OCCURRED WHEN A DECREASE IN IN COMPRESSED AIR SYSTEMS + CONT 77 03L 083077 STRUMENT AIR PRES $URE OCCURRED. ON AUGUST 6. 1977 A DECREASE IN INSTRUM OTHER COMPONENTS 018625 30-DAY ENT AIR PRES $URE OCCURRED WHICH cad 5ED THE FEEDWATER REGULATING VALVE 5 i SU8 COMPONENT NOT APPLICASLE GE O LOCK UP "A5 15* AND THE REAcioR SCR AMMED ON LOW WATER LEVEL. A FAUiTY COMPONENT FAILURE AIR COMPRESSOR WA5 REPAIRED AND SYSTEM RETURNED TO SERVICE. CAUSE SUSCODE NOT PROVIDED SEE REPORT INGERSOLL-R AND CO THE CAUSE OF THE OCCURRENCE WAS ATTRIBUTABLE 10 A FAILED HEAD CA5KET ON 4 THE HIGH PRES 5URE END OF AN INGERSOLL-RAND CDMPANY TYPE XLE-2-ML-2 AIR C OMPRE550R. MILLSTONE-l 85800245 088777 (77-25/3L) WHILE PERFORMING A SURVEILLANCE TEST (RELIEF / SAFETY VALVE BEL DIHR INST SYS Noi REQD FR SFTY 77 83L 883877 LOWS MONITOR OPERABILITY TEST) OPERASILITY OF THE BELLOWS MONITOR ON'ONE ~ INSTRUMENTAi!ON + CONTROL 5 818624 30-DAY OF THE SAFETY / RELIEF WALVES (1-MS-3F) COULD NOT BE VERIFIED. 41 1234 H NO SUSCOMPONENT PROVIDED GE OURS, AUGUST 7, 1977 A PLANT COOLDOWN COMMENCED. FOR IMWESTIGAIION OF IN COMPON @T FAILURE CIDENT. A F AULTY SWITCH WAS REPL ACED. AMD SYSTEM RETURNED TO SERVICE. CAUSECSUSCODE NOT PROVIDED SEE ATTACHED REPORT. OTHER A PRE 55URE SWITCH MANUFACTURED BY CUSTOM COMPONENil SWITCHE5 INC. (MODEL NUMSER 604GW3405) WAS FOUND TO BE DEFECTIVE. ~. 'I

i MAR 25. 3988 LER OUTPUT (N BWR COMPCE55ED AIR SYSTEMS AND PAGE 13 OTHER INSTRUMEMi SYSTEMS NOT CEQUIRED FOR SAFETY FROM 1969 10 THE PRESENI OUTPUI SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM / DOCKET h0./ COMPONENT / COMPONENT SURCODE/ LER NO./ EVENT DATE/ CAUSE/CAU5E SUSCCDE/ CONTROL NO./REPORI DATE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION 85888245 182477 (77-34) OH 10/28/77. At 2130 HRS. DURING PWR REDUCTION. BELLOWS LtAKAGE MILLSTONE-t DiMR INST SYS NOE-RE4D FR SFTY 77 All 182377 ALARM RECEIVED IN MAIN CONTROL ROOM INDIC AllNG BELLOWS OF T ARGET ROCK SA OTHER COMPONEJf5 019557 30-DAY FETY/ RELIEF VALVE (I-MS-3E) HAD FAILED. SURCOMPONE Y NOT APPLICABLE GE COMPONENT ILURE CAUSE SW CODE NOT PROVIDED KERITE 40.. INE CAUSE OF OCCURRENCE WAS ATTRIBUTABLE TO SHORT CIRCUIT BETWEEN WIRES CONN ECTED TO PRES 5URE SWITCH SENSING BELLOWS LEAKAGE. MILLSTONE-1 45880245 022279 ON FEBRUARY 22. 1979. AT 2005 HOURS. WHILE PERFORMING ROUTINE SURVEILLAN OTHR INST SYS NOT RE00 FR SFTY 79-089/03L-t 832279 CE (RELIEF / SAFETY VALVE BELLOWS NON110R SYSTEM OPERABILITY). THE OPERAtt PIPES. FIJI!NG5 025353 30-0AY LITY OF THE BELLOWS MONITOR ON ONE OF THE SAFEIY/ RELIEF VALVES (1-MS-3A) LESS IMAN 4 INCHES GE COULD HOT BE WERIFIED. ALTHOUGH THIS ALONE WOULD NOT FREVENT SAFEIV/RE COMPOWENT FAILURE LIEF VALVE OPERATION. IT DID RESULT IN THE INABILITY TO DEIECT A FAILED MECHANICAL DELLOWS. OTHER INSPEP.IION OF THE BELLOWS LEAK DETECTION AIR IUSING REVEALED A CRACK IN A FITTING THAT CONNECTS THE tutING TO INE VALVE SONNET CAP. THIS CRACK ALLOWED THE TEST AIR TO ESCAPE. RESULTING IN INSUFFICIEMI PRES 5URE FOR 5 WITCH ACTUATION. FITIING WAS REPLACED. SYSTEM TE5 FED SATI5FACIORILY. MILLSTONE-l /' 05000245 852879 ON MAY 28, 1979. AT 2130 HOURS. DURING REFUEL OPERATIONS. IT WAS NOTED i OTHR INST SYS NOT,REOD FR SFTY 79-t$5/03L-0 e62279 HAT NO CONTROL ROD CUT BLOCK OCCURRED WHEN THE REFUEL BRIDGE WAS OVER IN INSTRUMENTATION'+ CONTROLS 826845 30-DAY E CORE WITH A FUEL ASSEMBLY LOADED GRAPPLE. NO PROBASLE CONSEQUENCE 53 R SWITCH GE EFUEL PROCEDURES PREVENT INADVERIENT CRITIC".LITY DURING CORE ALTERATIONS COMPONENT F)!LL'RE ELECTRICAr GENERAL JEECTRIC Co. THE PRIMARY CAUSE OF THE OCCURRENCE WAS AliRIBUTED TO A WORN TRACK LIMIT / </ SWITCH. THE FUNCTIONAL SURVEILLANCE WA5 ACCOMPLISHED IN SUCH A WAY THA T THE WORN SWITCH WA5 NOT DETECTED. THE SWITCH WAS REPL ACED AND THE SHR VEILLANCE PROCEDURE WA5 CHANGED. p0NTICE.LO-l 85800263 090579 LOW AIR PRES 5URE CONDITIDH RESULTED IN REACTOR SCRAM. ISOLATION AND ECC5 COMPRESSED AIR SYSTEMS + CONT 79 83L 180571 INITIATION. CIRCUIT CLOSERS / INTERRUPTERS 803947 30-DAY NO SURCDitPONENT PROVIDED GE j PERSONNEL ERROR P CAUSE SURCODE NOT PROVIDED d NO MANUFACTU7ER SPECIFIED OPERATOR IMPROPERLY SET LOW AIR COMPRESSOR CONTROLS. I I 0 i

i MA2 25. 1988 LER CUTPUT ON BWR COMPRESSED AI2 SYSTEMS AND P*GE 14 OINER INSTRUME T SYSTEM 5 NOI REQUIRED FIR SAFETY FROM 8969 10 THE PRESENT OUTPUT SORTED BY FACILIIY AND EVENT DATE FACILITY /5YSTEN/ DOCKET NO./ COMPONENT / COMPONENT SU8 CODE / LER No./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONIKOL NO./ REPORT DATE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION MONTICELLO-1 85085263 092379 DURING NORMAL OPERATION A LEAK DEVELOPED IN A REAC10R PRES $uRE GAUCE, i OTHR IN51 SYS NOT PE00 FR SFTY 79-419/83L-0 18s479 NE LEAK LOWERED THE REFERENCE LEG OF THE SCRAM AND ECCS YARWAY LEVEL SWI INSTRUMENTATIDH + CONTROLS 827576 30-DAY TCHES CONNECTED TO INE SAME FROCE55 T AP. A5 A RESULT INE YARWAYS INDICA INDICAIOR ' GE TED A F AL5E HIGG LEVEL AND WOULD NOT HAVE TRIPPED WIININ THE SEIIING5 SP COMPONENT FAILURE ECIFIED IN T.S. 3.1.A. AND T.S. 3.2.A. AND I.S. 3.2.S. REDUNDANI L EVEL METALLURGICAL INSTRUMENTS WERE OPERASLE. DNE PREVIOUS SIMILAR OCCURRENCE REPORIED IN HEISE BOURDON TUBE CO. AD 50-263/75-12. PRES 5URE GAUGE IS A HEISE MODEL C. 8 t/2 INCH DIAL. D-8500 PSIG. 483 55 BOURDON TURE. SMALL CRACK DISCOVERED IN BOURDON TUBE MOST PROB ABL E C AU SE th FATIGUE. GAUGE 150ltiED AND REMOVED. NEW GAUGE WIIN WIDER RANGE AND IMPROVED SOURDON TUBE MATERI AL TO BE INSTALLED ON DIFFERENT PROCESS TAP NINE MILE POINT-3 05080228 680576 IER 76-14). DURING THE PERIOD OF JULY 47-JULY 22. 1976 CONDEN5ER DELTA OTHR INST SYS Hot RE0D FR SFIY 76 84T 888376 i AND DISCHARGE CANAL TEMPERATURE WERE NOT RECORDED HOURLY AS PER EIS SE INSTRUMENTATION

  • CONTROLS 015283 2-WEEK CT. 2.1. COMPUTER DATA WAS NOT WALID FOR THE PERIOD OF JULY 22-31 1976.

NO SUBCDMPONENT PROVIDED GE COMPONJNT F AILURE CAUSE SUSCODE NOT PROVIDED GEBERAL ELECTRIC CO. / THE COMPUTER TYPER5 WERE DOWN FROM JULY 17-JULY 22. 1976. NEW INSTRUMENT ATION FOR CANAL TEMPERATURES AND DELTA i MEASUREMENTS WERE INSTALLED AND CALIBRATION PROBLEMS INVALIDATED THE COMPUIER DATA. I STER CREEK-9 85000289 198678 FAILURE OCCURED IN STATION AIR SYSTEM RESULTING IN COMPLETE 1055 0F IN51 COMPRESSED AIR SYSTEMS + CONT 78 03L 821771 RUMENT AIR IN FACILITY. OPERATOR INITIATED MANUAL SCRAM AFTER HE NOTICED PIPES.FIfi!NG5 083483 30-DAY IN0!WIDUAL ROD 5 5 CRAMMING. NO SUBCOMPONENT PROVIDED GE COMPONENT FAILURE CAUSE SUSCODE NOT PROVIDED ,, N0 MANUFACTURER SPECIFIED RUPTURE OF 6 INCH STAINLESS STEEL FLEXIBLE CONNECTION MOUNTED ON DISCHAR 6 GE SIDE OF AIR COMPRESSOR. PEACH 30TIOM-2 s/ 05800277 020876 (2-74-6/3L) TIP MACHINE NO. 4 OVERTRAVELED ITS LIMIT SWITCH WHEN THE PRO OTHR INST SYS NOT RE0D FR SFTY 76 03L 030476 SE WAS BEING WIIHDRAWM TO ITS SHIELD. THE PROBE WIINDRAWAL WAS IMMEDIATE IN51RUMENTATION + CONTROLS 814155 30-DAY LY TERMINATED BY THE TIP MACHINE OPERATOR AND INE PROBLE WAS REINSERIED NO SUBCOMPONENT PROVIDED GE AND WITHDRAWN A SECOND TIME. SATISFACTORY OPERAi!ON HA5 CONTINUED 10 THI ~ COMPONENT FAILURE 5 DATE. SEVERAL $1MILAR OCCURRENCES. CAUSE SUSCODE Hoi PROVIDED OTHER THE OCCURRENCE WAS APPARENTLY CAUSED SY FAILURE OF THE SHIELD LIMIT SWIT CH TO ACTUATE. HUMEROUS ATTEMPIS TO RECREATE THE FAILURE, HOWEVER. PROVE D UH5UCCE55FUL. I

MAR 25. 1;BS LER DUTPUT (N BWR COMPIE55ED AIR SYSTEMS CMD PAGE IS OTHER INSTRUMENT SYSTEMS NOT REQUIRED FOR SiFETY FRDM 1969 TO THE PRESEMI OUTPUT 50RIED BY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ COMPONENT / COMPONENT SUICODE/ LER MO./ EVENT DATE/ CAUSE/CAUSE SUBCODE/ CONTROL NO./ REPORT DATE/ EVENT DESCRIPTION / COMPONENT MANUFACIURER M555 REPORT TYPE CAUSE DESCRIPi10M PEACH BoilDM-2 05000277 062076 (2-76-45/3L) A LIGHTHING STRIKE ON THE MAIN SIACK DISABLED BOTH MV/I UNI OTHR INST SYS NOT LEOD FR SFTY 76 03L 072B76 15 $UPPLYING THE INPUT TO MAIN STACK FLOW RECORDER. PRIOR FLOW RAIE WA5 INSTRUMENTATION

  • CONTROLS 085343 30-DAY KNOWN, THE MAJORITY BEING SUPPLIED BY TWO DILUTION FANS. FANS REMAINED 0 NO SUBCOMPCNENT PROVIDED GE N DURING IHOPERASILITY. ONE MV/I UNIT WAS RETURNED 10 SERVICE IN 5 HOUR 5 OTHER

. THE SECOND UNIT REMAINS OUT OF SERVICE PENDING SPARE PARIS. CAUSE SUBCODE NOT PROVIDED LEEDS B NORINRUP CO. LEEDS AND NORTHRUP MODEL 444535 MV/I UNITS-ELECTRONIC COMPONENTS DAMAGED BY CURRENT SURGE FROM LIGHINING STRIKE. PEACH B0110M-2 05000277 120776 (LER 2-76-83/3L). NUMBER 2 TIP MACHINE SHIELD LIMIT SWITCH TRIPPED WITH OTHR INST SYS NOT REOD FR SFTY 76 03L 122276 THE TIP DEIECTOR INCORE. THIS CAUSED THE ISOL ATION BALL VALVE 10 CLOSE A INSTRUMENIATION + CSMTROLS 096487 30-DAY ND PREVENT WITHDRAWAL OF THE TIP PROBE. THE SWIICH WAS RE ADJU5IED AND PR HO SUBCOMPONENT M OVIDED GE OPER TIP OPERATION WAS CONF 1kMED. SEVERAL SIMILAR OCCURRENCES HAVE BEEN COMPONENT FAILURE REPORTED. CAUSE SUSC00V NOT PROVIDED GENER AL ELECJu!C CO. / IIP MACHINE SHIELD LIMIT SW!iCH (G.E.CO. i3ENTIFICATION HO. 209A4043P005 ) OPER ATED SPURIOUSLY CAUSING IMPROPER CL OSING OF IHE BALL VALVE PREVENT ING IIP WIIMDRAWAL. THE SWITCH WAS ADJUSTED AND CHECKED SATI5FACIORILY. PEACH BOTTOM-2 / 05000277 018177 (2-77-6/3L)MD 9 TIP MACHINE PROBE IR AVELLED BEYOND IN-SHIEL D LIMIT SWITC OTHR INST SYS NOT REOD FR SFTY 77 03L 820477 H DURING WITHDRAWAL. PROBE WITHDRAWAL IMMEDI ATELY IERMINAIED BY OPER AIOR INSTRUMENTATION + CONTROL 5 986865 30-DAY . PROBE REINSERIED AND DURING SUB5EQUENT OPER ATIONS. LIMIT SWITCH PERFOR NO SURCOMPONENT PROVIDED GE MED SATISFACTORILY. SEVERAL SIMILAR OCCURRENCES. BACK-UP CIRCUIT IN0PERA COMP 0H&MT FAILURE TIVE DUE TO WIRING SHORT. SHORT CORRECTED - NO PREVIOUS OCCURRENCE. CAUSE SURCODE NOT PROVIDED CA%NON TOOL CO. MISOPERATION OF IN-SHIELD LIMIT SWITCH AND SHORT CIRCUIT IN BACK-UP CIRC UIT. NUNEROUS ATIEMPT5 TO DUPLICATE FAILURE PROVED UNSUCCUS5FUL FOLLOWIN G REPAIR AND CHECK OF BACK-UP CIRCUIT. PEACH BOTTOM-2 05000277 042277 (2-77-24/3L) 'JHILE TROUBLE SHOOi!NG THE "B" 0FF-GA5 STACK FLOW INDICATIO OTHR INST SYS N0f 77 031 052077 N LOOP. THE REDUNDANT "A" LOOP WAS INADVERIENTLY REMOVED FROM SERVICE. F INSTRUMENT ATION +f GD FR SFTY CONTROLS 017716 30-DAY LDW RAIES OF DILUTION FAN 5 WERE KNOWN PRIOR TO OCCURRENCE. BOTH FAN 5 REN f N0 SUBCOMPONEC PROVIDED GE AINED IN SERVICE. "A" FLOW LOOP WA5 RETURNED 10 SERVICE WHEN ERROR WAS D ~ PERSONNEL ERRdR 15 COVERED. "B" LOOP REMA1HS OUT OF SERVICE AWAITING PARIS. CAUSE SUBCODE NOT PROVIDED IIEM NOT APPLICABLE / "A" FLOW LOOP WAS IMADVERIENTLY MADE INOPER ABLE WHEN MISL ABELED PRINIED CIRCUIT BOARD WAS REMOVED FROM SERVICE. LABELING OF OFF-GAS SIACK FLOW E QUIPMEHi NAS BEEN REVIEWED AND CORRECTED 10 PREVENT RECURRENCE. ~

MAR 25, 1981 LER CUTPUT ON BWR COMPOESSED AIR SYSTEMS OND PAGE 16 OINEk INSIRUMENT SYSIEMS NOT REQUIRED FOR SAFETY FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACIlliY AND EVENT DATE FACILITf/5f5 FEM / DOCKET NO./ COMPONENT / COMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONIROL NO./ REPORT DATE/ FVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPi10N E3800277 458577 IMOPERABILITY OF MAIN STACK FLOW INDICATOR-LIGHINING STRIKE ON MAIN STAC PEACH SOT 10M-2 OINR INST SYS NOT REQD FR 5FTY 77 03L 860377 K CAUSED LOSS OF 2ND ST ACK FLOW INDICATOR (*S"). PRIOR FLOW RATE WAS KNO INSTRUMENTAll0N + CONTROLS 017778 30-DAY WN. THE MAJORITY BEING SUPPLIED BY TWO DILUTION FANS. FANS REMAINED ON D OTHER GE URING IMOPERABILITY. FLOW INDICATOR "A" NAS SEEN RETURNED 10 SERVICE AND h0 SUSCOMPONENT PROVIDED "B" REMAINS OUT OF SE2VICE PENDING PART5. PREVIOU5 OCCURRENCE. CAUSE SURCODE NOT PROVIDED LEEDS 8 MORTHAUP CO. LEEDS AND NORINRUP MODEL 444535 MV/I UNIT "t* INSTRUMENT L OOP-ELECTRONIC COMPONENTS DAMAGED BY CURRENT SURGE FROM LIGNINING 51RIKE. PEACH B0iinM-2 85088277 850577 IMOPERABILITY OF MAIN STAfK FLOW INDICATOR-LIGNINING STRIKE ON MAIN STAC OTHR INST SYS NOT R FR SFTY 77 03L 060377 K CAUSED LOSS OF 2ND SI ACK FLOW INDICATOR ("B"). PRIOR FLOW RATE WAS ENO INSTRUMENTATION ONTROL5 857775 38-DAY WN. INE MAJORITY BEING SUPPLIED BY TWO DILUTION FANS. FANS REMAINED ON D OINER /' GE URING IMOPERASILITY. FLOW INDICATOR "A" NAS BEEN RETURNED 10 SERVICE AND NO SUSCOMPONEpY PROVIDED "B" REMAlH5 OUT OF SERVICE PENDING PARTS. PREVIOUS OCCURRENCE. CAUSE SUSCODE NOT PROVIDED LEEDS 4,MORTHRUP Co. LEEDS AND NORINRUP MODEL 444535 MW/I UNIT "B" INSTRUMENT LOOP-ELECTRONIC COMPONENIS DAMAGED BY CURREMI SURGE FROM LIGNINING STRIKE. PEACH BOTTOM-2 05000277 850577 (77-26) IMOPERASILITY OF MAIN ST ACK FLOW INDICATOR-LIGHTHING tlRIKE ON OTHE INST SYS NOT BOD FR 5FTY 77 83L 860377 MAIN ST ACK C AUSED LOSS OF 2ND ST ACK FLOW INDICATOR ("4"). PRIOR FLOW RA INSTRUMENTATION CONIROLS 828124 30-DAY TE WAS KNOWN, THE MAJOR!iY BEING SUPPLIED BY TWO DILUTION FANS. FANS RE NO SUSCDMPONEN PROVIDED CE MAINED ON DU3ING IMOPERASILITY. FLOW INDICATOR "A" HAS BEEN RETURNED TO OTHER SERVICE AND "B" REMAINS OUT OF SERVICE PENDING PART5. PREVIOUS OCCUR. NOT APPLICABLE LEEDS MORTHRUP CD. LEED5 AND NORINRUP MODEL 444535 MV/I UNIT "B" INSTRUMENT 00P-ELECTRONIC COMPONENTS DAMAGED BY CURRENT SURGE FROM LIGNINING SIRIKE. PEACH BOTTOM-2 / 05408277 860977 (2-77-31/3L) A LIGHTNING STRIKE ON INE MAIN STACK CAUSED LOSS OF 2ND STA OTHR INST SYS HDT REQD FR 5FTY 77 03L 061577 CK FLOW INDICATOR ("A"). PRIOR FLOW RATE WAS KNOWN. THE MAJORITY BEING S INSTRUMENTATIdH + CONTROLS 817958 30-DAY UPPLIED BY TWO DELUTION FANS. FANS REMAINED ON DURING INOPERASILITY. INE No SUSC05PONENT PRGWIDED GE "A" FLDW LOOP WAS RETURNED TO SERVICE 6/2/77 AND INE "B" LOOP APPROXIMA ~ OTHER -< TELY ONE WEEK LATER. PREVIOUS OCCURRENCE. CAUS$'5USCODE NOT PROVIDED LEE 95 & NORINRUP CO. OMPONENTS DAMAGED BY CURREHi SURGE FROM LIGHTHING STRIKE. ADDIIIONAL LIG HINING SURGE PROIECTION WAS INSTALLED ON 6/6/77. ~. {

I

I MAR 25. 1989 LER CUIPui ON SWR COMPIE55ED AI2 SYSTEMS A%D PAGE T7 OINER INSTRUMENT SYSTEMS NOT REQUIIED FOR SiFEIY FROM 1969 10 THE PRESENT OUIPUT 50RIED BY FACILIIY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ COMPONENT / COMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONIROL NO./ REPORT DATE/ EVENT DESCRIPTION / CDNPONENT MANUFACTURER H555 REPORT TYPE CAUSE DESCRIPTION PEACH B0iiOM-2 s# 45488277 868777 (2-77-32/3L) A LIGHINING STRIKE ON MAIN STACK CAUSED LOS$ OF MAIN SI ACK OTHR INST SYS NOT RE4D FR SFTY 77 83L 879577 FLOW INDICATOR FOR 10 NINUIES. PRIOR FLOW RATE WAS KNOWN WIIH MAJORITY B INSTRuMENTAT!0N + CONTROLS 818275 38-DAY EING SUPPLIED BY 2 DILUITON FANS WHICH CONTINUED 10 OPERATE. FLOW INDICA OTHER s' GE T10HL REIURNED WITHOUT ANY ACTION BEING TAKEN. AM INVE5flGATION !$ SEING No SutCOMPONENT PROVIDED CONDUCTED SY THE ENGINEERING DEPT. CAUS '5USCODE NOT PROVIDED ITEM not APPLICABLE f TEMPORARY INOPERASILITY APPARENTLY CAUSED BY VOLTAGE SURGE DUE 10 LIGHIN j ING STRIKE. / PEACH BOTTOM-2 85808277 870677 (2-77-33/3L). LIGHTNING STRIKE C AUSED LOS5 OF MAIN ST ACK FLOW INDIC ATION OTHR INSI SY MOT REE3 FR SFTY 77 03L 888277 FOR 18 HRS. FLOW R AIE PRIOR TO OCCURRENCE WAS KNOWN AND WAS SUPPLIED SY INSTRUMENTA ION + CONTROLS 488258 38-DAY 2 DILUi!ON FANS. BOTH FANS REMAlHED ON DURING INSTRUMENTATION OUTAGE. i NO SUBC W ONENT PROVIDED GE HE A INSTRUMENT LOOP WAS RETURNED TO SERVICE ON 7-7-77. 8 LOOP REMAINED COMPONENT FAILURE DUT PENDING INST ALL OF AN !$0L ATION TRANSFORMER 10 IMPROVE RELI ABILITY. CAUSE.5USCODE NOT PROVIDED LEEDS,8 NORTHRUP CO. CURRENT SURGE FROM LIGHTNING STRIKE DAMAGED LEEDS AND NORTHRUP MODEL 444 535 MV/1 UNITS IN BOTH STACK FLOW LOOPS. DOTH MV/1 UNITS WERE REPLACED. PEACH BOTTDM-1 85000278 821076 (5-76-24/3L) HUMBER 2 TIP MACHINE CONTAIMMENT 150LAll0N SALL VALVF FAI OTHR INST SYS 40i RE4D FR SFTY 76 83L 930876 L ED TO CLO5E AUTOMATICALLY FOLLOWING PROBc REIRACTION. THE VALVE WAS CLO VALWE5 / S14474 30-DAY SED USING THE REMOTE MANUAL SWITCH. THE VALVE WAS DISASSEMBLED. CLEANED, M0 SUSCOMP,0NENT PROVIDED GE REASSEMBLED, AND TEST SATI5FACTORILY. COMPONEHji FAILURE CAUSE atCODE NOT PROVIDED CONSOL ATED CONIROLS CORP. CONSOLIDATED CONTROLS CORPORATIDH 50LEH0lD OPERLTED VALVE CONTAINED IN G .E. ASSEMBLY 89898564G004 - EXCESSIVE LUBRICATION BUILDUP CAUSED THE WAL VE TO BIND WHEN STROKED. THIS INCIDENT 15 RECURREMI. PEACH 80T10M-5 05888278 080477 (3-77-39/IT) NUMBER 3 TIP MACHINE 20NIAINMEHi ISOL Ai!ON SALL VALVE FAILE OTHR INSI SYS NOT RE4D FR SFTY 77 eli 081277 D TO CL OSE AUIDMATICALLY FOLLOWING PROSE RETR ACTION. THE BALL VALVE WAS VALVES e' 888470 2-WEEK REMOV[D AND REPL ACED WITH AN IDENIICAL VALVE. THE TIP SHEAR VALVE WAS AV NG SUSCOMPDNENT PROVIDED GE AILABLE FOR ISOLATION IF REQUIRED. THERE HAVE BEEN SIMILAR PREVIOUS OCCU ~ COMPONENT / FAILURE RRENCES. CAUSE OBCODE HOI PROVIDED CON 50L ATED CONTROLS CORP. CONSOLIDATED CONTROLS CORPORATION SOLEHOID OPERATED VALVE CONTA!HER IN G .E. ASSEMBLY 0919056G004 FAILED TO CLOSE DUE TO BINDING CAUSED BY EXCES5 IVE LUBRICATION SulLDUP FROM THE TIP CABLE. ~ t

I MAR 25. Ital-LER CUTPUT ON SWR COMPRESSED AIR SYSTEMS AND PDGE IS OIMER INSTRUMENT SYSTEMS NOT REQUIRED FOR SAFETY FRDM 8969 10 THE PRESENT GUTPUT SORTED SY FACILITY AND EVENT DATE FACILITY /5YSTEM/ DOCKET NO./ COMPONENT / COMPONENT SUSCODE/ LER NO./ EVENT DATE/ CAUSE/CAUSE SUSCODE/ CONTROL NO./REPORY DAIE/ EVENT DESCRIPTION / COMPONENT MANUFACTURER M555 REPORT TYPE CAUSE DESCRIPTION QUAD CITIES-t 85888254 872975 WHEN THE TIP DETECTOR WAS WITHDRAWN INTO INE SHIELD. THE BALL VALWE FAIL OTHR INST SYS NOT REOD FR 5FTY 75 eli 873875 ED 10 CLOSE. UNDER ACCIDENT CONDITI0t:5. LEAKAGE THROUGH THE OPEN TIP TUS VALVES St3892 2-WEEK E WOULD HAVE BEEN WITHIN THE CAPABILITY OF THE 58GI5. VALVE WAS OPEN 3H NO SUSCOMPONENT PROVIDED GE I R AND 15 MIN (50-254/75-17) COMPONENT FAILURE CAUSE SUSCODE NOT PROVIDED NO MANUFACTURER SPECIFIED FAILURE OF THE VALVE SPRING TO CLOSE THE VALVE COMPLETELY. VALVE 15 SPRI NG LOADED CLOSED. VALVE REPL ACED AND NEW DESIGN OPERATOR INSTALLED. / VERMONT YANKEE-1 85888278 932879 DURING PLANT REFUELING OPERATIDMS. " ROD WITHDRAW PERMISSIVE" LIGNI ON CR OTHR INST SYS.NOT RE4D FR SFTY 79-est/03L-0 042479 P 9-5 WAS OPERATING IN AN INTERMITIEMI FA5HION WHEN REFUELING PLATFORM W INSTRUMENTATION + CONTROL 5 025814 30-DAY AS MOVING TOWARD CORE WITH LOADED FUEL BUNDLE. THIS INDICA 1ED A POIENTI 5 WITCH GE AL REFUELING INTERLOCK CIRCUITRY INOPERAblLITY. ALL REFUELING OPERATION COMPONENT FAILURE' 5 IMM[D. SUSPENDED. THE " REFUELING PLATFORM NEAR OR OVER INE CORE" 1RAC OTHER K SWITCHES FUNCTIONED INTERMITTENTLY CONTRARY TO TECH. SPEC. 5.12.A.t.A li p NOT APPLICABLE 8 B AND 3.12.A.S.A. REFUELING INTERLOCK $ ARE BACKUP TO OPE

R. PROCEDURE

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I OUTLINE OF SOME OF THE MAIN EVENTS IN THE BROWilS FERRY FIRE bbtk!$Hb 12:20 0 THE POLYURETHANE IGillTED lilSIDE THE CABLE PENETRATION. 12 :35 0.25 FIRE WAS REPORTED TO THE CONTROL ROOM. 12 :40 0.33 FALSE ALARM 0F LOW WATER LEVEL ON THE EMERGENCY CORE COOLING (ECCS) PAtlEL. I SOME SYSTEMS (E.G. ECCS) ALARNED AS RUtiNING. SlfillAR SPURIOUS ACTUATIONS OCCURRED DURING THE NEXT FIFTEEN MINUTES AND ECCS THAT STARTED WAS MANUALLY TERMINATED. 12:48 0.47 MANY OF THE L,1GHTS 0:1 THE ECCS PANEL WERE LOST. THE REACTOR POWER LEVEL DECREASED DUE TO RECIRCULATION PUNP DISORDERS. SEVEN OF ELEVEN REllEF VALVES FAILED. 12 :51 0.52 REACTOR WAS SCRAff1ED. i 12:55 0.58 NEUTRON MONITORING AND CONTROL R0D POSITION INDICATORS LOST.

f .h OUTLINE (CONTINUED) 5 i l bh-lkFkHhbf 12 :56 0.60 .BY THIS TIME, MNY ELECTRICAL BOARDS i AND ALL ECC SYSTEllS FAILED, EXCEPT { THE MNUALLY OPERABLE FOUR REllEF VALVES. THE MIN STREAMLINE ISOLATION VALVES CLOSED. THE ONLY HIGH PRESSURE i COOLANT INJECTION PUMP OPERATING WAS THE CONTROL ROD DRIVE (CRD) PUMP.. 13:30 1.17 THE VESSEL WAS DEPRESSURIZED BY THE REllEF VALVES TO BELOW 350 PSIG TO ALLOW THE AVAll.ABLE C0llDENSATE B0OSTER PUMPS TO INJECT WATER. 18:00 5.67 REllEF VALVES FAILED. VESSEL PRESSURE STARTED T0 INCREASE. HOWEVER, THE CRD PUMP WAS PROVIDING MKEUP FLOW. IT IS ESTIMTED THAT. : 6 HOURS WOULD HAVE LAPSED BEFORE WATER LOSS FR011 REllEF -{ VALVES OCCURRED. l l

l l l h OUTLINE (CONTINUED) } ~ b[! kk Hbh f 19:00 6.67 WATER WAS SPRAYED ON THE FIRE. ITS EXTitlCTION WAS AfifiOUNCED IN llALF AN HOUR. 21:50 9.5 REllEF VALVES WERE RESTORED. THE VESSEL WAS AGAIN DEPRESSURIZED ALLOWING CONDENSATE f%KEUP TO BE PROVIDED. e 0 l l

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~ .T Reb.f velve &flef,,e., contro s failedN / renerete removed I I I I i 10 5 j, s l / j g Discrete steps uyd c meni ia f is ) ,a-> r +. w l i ,e Pectori.1 es em.te of espected 10'I - 1 1 l v.retion with time i I l l l l l < 0.5 - 5.5 - 9.5 Time After Fire thours) e, r.... ~ w. e m i

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a.......,~.....-...... -....-~,~e. ....e .m i. ooo w........... e.. -,_ ~,-, ~ .de.ea PREDICTED PROBABILITY OF CORE MELT VERSUS Tine DURING THE BRONNS' FERRY FIRE, l l l l

i FAILURE POSSIBILITIES FOR TIME LESS rartveE TO MAINTarN VESSEL INVENTORT THAN 5.5 HOURS AFTER FIRE START DURING PHASE 2 P2 = 0.M3 t-3 f RCS CRD T=f r FAILURE TO PROVIDE FAILURE TO CONTROL HIGH-PRESSURE DELIVERT RCS PRESSURES TO LESS TO AUGMENT CRD PUMP IN THAN 350 PSIG BY STEAM , ~2 HOURS WHEN RCS RELIEF PRESSURE IS HIGH P = 0.06 l P = 0.05 1 T 1 HPIS M51Y tT RY RCIC / i 1 i FAILURE OF REMAINING FAlltfRE TO VALVE IN FAILURE TO RESTORE RELIEF VALVES AND FAILURE TO RESTORE RCIC OTHER POSSIBLE SOURCES HPIS OPERATION IN -2 FAILURE TO REPA!R AT ' OPERATION IN ~2 HOURS 'TO AUGMENT CRD DELIVERY , LEAST ONE VALVE OF 11 HOURS 1 P = 0.4 IN-2 HOURS P = 1.0 IN -2 HOURS P = 0.12 P = 0.0A f 7 CRD-FLO M' CR D-5LC 1 I FAILURE TO VALVE IN FAILURE TO REPAIR SLC FAILURE TO REPAIR CRD BYPASS FLOW IN FOR DELIVERY IM-2 HOURS M51Y IN -2 HOURS ~2 HOURS P = 0.4 P=1 P = 0.3 l t m ,y-,,, ,e,,,,r-,w ,m,

4 I f PROBABILITY Cr FAILURE TO MAINTAIN i . ADEQUATE VESSEL 1;r!ENTORY DURING PHASE 2 ( ? f i I P = P(RCIC) x Pggggg) x P(CRD-FLO) x P(CRD-SLC) x Pggy) x P(33;y) 2 i = 0.4 x 1 x 0.3 x 0.4 x 0.% x 1 I = 0.003 = 1/200 RY x 0.003 = 1 x 19-5 /RY P xP = P h0h.ff[hhAS$2 d - -+-, + _e-. --*w ,.- - - +. - - - e- _~.

N PHASE 2 STANDBY LIQUID CONTROL SYSTEM P(CRD-SLC) = EXP ( T /w TR) - ExP (-2/2.5) 1 = 0.4 EERE: - EShillATED TIME WINDOW T0 f1ELT 1 =2 HOURS (RSS ESTim TE) T MEAN REPAIR TIME =2.5 HOURS = n tlQIES 1. C0flTROL POWER INTERRUPTED TO SLC PUitPS a VALVES FOR -3 HOURS AFTER START OF FIRE. 2. ACTUAL SLC REPAIR DONE IN ~3.5 HOURS AFTER START OF FIRE. 3. IT liAS ESTim TED THAT REPAIR COULD HAVE. BEEfl DONE IN ~1 HOUR HAD THE URGEtlCY EXISTED. 4. RSS USED t1EAN REPAIR Tif1E ESTimTE OF~2.5 HOURS. 5. SLC COULD HAVE SATISFACTORILY AUGMENTED EXISTING CRD PUt1P MKEUP, Afl0 GIVE ADDED TIME WiflDOW FOR OTilER REPA!RS. r -- - - - - ' - - - - -}}

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