ML19207A033
| ML19207A033 | |
| Person / Time | |
|---|---|
| Site: | Crane  |
| Issue date: | 04/18/1979 |
| From: | HEALTH & HUMAN SERVICES, DEPT. OF, NRC OFFICE OF MANAGEMENT AND PROGRAM ANALYSIS (MPA) |
| To: | |
| References | |
| NUDOCS 7905090227 | |
| Download: ML19207A033 (83) | |
Text
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 *HD 2
" * ' L' 2 FRCM 1969 TO THE PRESEtli OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY /?YSTEM/
C OMP O N E N T / C OMP o tie N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER t10./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT mat 4UFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION T H R E E fil L E ISLAND-1 05000289 051573 MOTOR FOR NUCLEAR SERVICE WATER PUMP SYSTEM CAUGHT FIRE AFTER PUNT ING F0 STATION SERV WATER SYS + CONT 73 02X 082073 R 1 1/2 HOURS UNDER FULL LOAD CONDITIDNS.
MOTORS 001230 OTHER SUBCOMPONENT NOT APPLICABLE COMPONENT FAlLURE CAUSE SUBCODE t10 T PROVIDED NO MAtiUFACTURER SPECIFIED MOTOR SHORTED.
THREE MILE ISLAND-1 05000289 051773 DOCUMEt4T ATI0tl 0F MECH ANIC AL PROPERTIES OF FILLER EL ECTRODES USED FOR MAN COOLANT RECIRC SYS + C0tiTROLS 73 02L 061373 UAL METAL ARC PROCESS ON REACTOR VESSELS, CLOSURE HEADS AtiD PRESSURIZERS VESSELS. PRESSURE 001206 30-DAY WAS INCOMPLETE.
PI O SUBCOMPONENT PROVIDED PER50 TINEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED CAUSE FOR INCOMPLETE DOCUMENTATION WAS UNIDENTIFIED LUT FROBABLY RELATED TO INADEQUATE QA-QC PROGRAM.
THREE MILE ISLAND-1 05000289 072373 30 GREASE LEAKS WERE DISCOVERED EMERGItiG FROM REACTOR BUILDING TEtiD0hS.
REACTOR CON T AltiMLH T SYSTEMS 73 02L 081773 GREASE FCLLOWED PATH IHROUGH SHRItiKAGE CRACKS ABOVE BASE f1AT.
VESSELS, PRESSURE 001231 30-DAY NO SUBCOMPONENT PROVIDED DESIGN / FABRICATION ERROR CAUSE SUBCODE t101 PROVIDED NO MANUFACTURER SPECIFIED PROBABLY DUE TO USING GREASE OF TOO LOW VISCOSITY.
THREE MILE ISLAND-1 05000289 072373 REACTOR PROTECTIVE INSTRUMENTATI0tl AND ELECTRICAL EQUIPMENT WAS tiDT INSP REACf0R TRIP SYSTEMS 73 02L 080673 ECTED AND TESTED IN ACCORDAtiCE WITH ESTABLISHED Q.C.
PROCEDURES INSTRUMENTATION + CONTROLS 001234 30-DAY NU S U B C OMP ollE N T PROVIDED PERSONNEL LRROR CAUSE SUBCODE riot PROVIDED NO MANUFACTURER SPECIFIED psj BREAKDOWN OF Q.C.
PROGRAM.
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e APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 3 FROM 1969 TO THE PRESENT GUTPUT SURTED BY FACILITY AtiD EVENT DATE FACILITY / SYSTEM /
C OMP O N E N T / C Ct1P 0 t1E N T SUBCODE/
DOCKET tlU./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER HO.'
REPORT DATE/
EVENT DESCRIPTIDH/
C OMP 0 tlEN T MAriUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 082073 DURING TESTING OF CORE FLOODING SYSTEM, VALVE CF-V-1A COULD HOT B E O P E t4 F.
Lt1 ERG CORE C00LItiG SYS + CONT 73 02L 091873 D T10RE T H AN 2" BY H AtlD, AtiD V ALVE CF-V-1B COUL D tiOT BE OPEtiED MORE THAN VALVES 001216 30-DAY 1/2 INCH.
NO S U B C OMP 0 fi E N T PROVIDED DESIGN / FABRICATION ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER Sfi.o1FIED STEM NUT WOULD NOT TRAVEL MORE thall 5" DOWN STEM BECAUSE THERE WAS A GRA DUAL It4 CREASE I ti DIA!1ETER OF STEM. STEM llAD TO BE TAPERED FURTHER FOR PR OPER OPERATION.
THREE MILE ISLAND-1 05000289 102573 REACTOR C00L AtiT SYSTEM WAS ACCIDENTLY DRAINED OF 4000 GALLONS OF WATER.
COOLANT RECIRC SYS + C0t4TROLS 73 02L 120473 DUE TO OPERATOR ERROR. OPERATOR CORRECTED IMMEDIATELY. t40 SAFEIY SIGNIFI VALVES 000653 30-DAY CANCE. HAND WRITTEtt PROCEDURE USE
D. PROCEDURE
WRITEUP Ill PROGRESS.
110 SUBC0t1PONENT PROVIDED PERSONNEL LRROR CAUSE SUBCODE NOT PROVIDED 140 MANUFACTURER SPECIFIED OPERATOR OPENED WRONG VALVE. REALIZED ERROR AND CLOSED VALV
E. PROCEDURE
S BEING FINALIZED-THREE MILE ISLAND-1 05000289 112073 SEVEN OF EIGHT VENT VALVE THERMOCOUPLE N0ZZLES ON REACTOR VESSEL CLOSURE REACTOR VES. + APPURTENANCES 73 02L 122073 HEAD WERE DISTORTED. IN ADDITION THERM 0 COUPLE CUIDE TUDES Oti PLEtiUt1 ASS PIPES. FITTINGS 001255 30-DAY Et1BLY WERE DISTORTED.
t10 SUBCut1P0tiEtli PROVIDED PERSONNEL ERROR CAUSE SUBCODE t40T PROVIDED t10 MANUFACTURER SPECIFIED CAUSE tt0T IDENTIFIED.
THREE MILE ISLAND-1 05000289 112673 VEllT VALVE THERMOCOUPLE GUIDE TUBES WERE BENT DURING CLOSURE HEAD REMOVA REACTOR VES. + APPURTENANCES 73 02L 122073 L.
THERt10 COUPLES ARE NOT A LICENSE RLQUIREMEtiT. PARTIALLY REf10VED 110ZZLE
?IPES,FITTItiGS 000652 30-DAY S TO ret 1EDY.
NO S U B C OMP C riE N T PROVIDED P E R S O Nii E L LRROR CAUSE SUBCODE NOT PROVIDED NO MAtiUFACTURER SPECIFIED N
43 CLOSE TOLERAtiCE AND CLOSURE HEAD REf10 VAL. PARTIALLY REMOVED tiO2ZLES.
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e APR 18, 1979 LER OUTPUT ON EVEtlTS AT THREE MIME ISLAND 1 AND 2 PAGL 4 FRUM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C OMP O N E N T / C OMP 0 t4 E t4 T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER 140./
REPORT DATE/
EVENT DESCRIPTION /
Cot 1P0t4ENT M AtlU F AC T UR ER CONTROL NO. REPORT TYPE CAUSE DESCRIPTI0tl THREE MILE ISLAND-1 05000289 030474 DURING SURVEILL At4CE TESTING THE DIESEL GENERATORS FAILED TO RUti WHEN GIV EMERG GEtiERATOR SYS + C 0 tlT R O L S 74 02L 04G474 E tt A START SIGNAL.
It4S TRUMENT A T I0ti + CONTROLS 010147 30-DAY NO SU B C OMP 0 tiEN T PROVIDED DEFECTIVE PROCEDURES CAUSE SUBCODE IIOT PROVIDED NO MANUFACTURER SPECIFIED THE TEST CHANNEL DID t10T OVERRIDF THE PREVIOUSLY ACTIVATED SHUTDOWN RELA Y.
THREE MILE ISLAND-1 05000289 032974 RECIRCULATION ORIFICES WERE EXAMINED FOR WALL EROSIO;1, EUT NO SIGt45 0F E C00L At4 T RECIRC SYS + CONTROLS 74 02X 043074 ROSION WERE FOUND. NEW ORIFICES WILL BE I!4 STALLED IN THE FUTURE.
PIPES,FITTIttGS 010191 OTHER t10 S U B C 0!1P o t4 E N T PROVIDED C OMP O N E ti T FAILURE CAUSE SUBCODE t40 T PROVl]ED NO MAttufACTURER SPECIFIED HIGH FLUID VELOCITY HAD CAUSED EROSION AT ARK 1 TilREE MILE ISL At4D-1 05000289 040274 MAIN STEAM PENETRATI0tt DESIGli MODIFIC ATICN. ONE OF FOUR P EN ET R A T I O'i AIR-REACTOR CONTAINMEill SYSTEMS 74 02T 040574 COOLERS FOR THE MAIN STEAM DUMP L Ill E ( P Et4 E T R A T I0tl N O. 112 Ort PEllETRATION pet 1ETRATIONS PRIMRY CONTAINMtiT 010089 2-WEEK PRESSURIZATION SYSTEM) LEAKS. PLAN TO ISOLATE THE COOLER AND RETURil SYS NO S U B C O:1P O N E tit PROVIDED TEM TO OPERAT10tl.
C0t1PON E N T FAILORE CAUSE SUDCODE NOT PROVIDED t40 f tat 4UF ACTURER SPECIFIED CAUSE OF LEAK Ut4 REPORTED.
THREE MILE IS! AtlD-t 05000289 040374 A 3/4-INCH CARBON STEEL NUT WAS FOUtID ON TOP OF THE LOWER GRID ASSEMBLY.
REACTOR VESSEL TNTERNALS 74 02L 042674 OTHER C OMP 0 t4 E N T S 010043 30-DAY S U B C 0f!P O N E N I NOI APPLICABLE
~
C OMP 0 tl E tit FAILURE CAUSE SUCC00E NOT PROVIDED 110 MAtiUFACTURER SPECIFIED g
H0 REASON GIVEN. INVESTIGATION STILL IN PROGRESS.
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APR 18, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 5 FROM 1969 TG THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
~
C0f1PONENT/ COMPONENT SUBCODE/
DOCKET tiO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT D E S C R I P T I 0 ti/
C OMP O N Elli MAtlufACTURER C0tiTROL HO. REPORT TYPE CAUSE DESCRIPT10ti THREE MILE ISLAND-1 05000289 040974 WiiILE PUMPING A SOLUTION OF SODIUM THIOSULCAlE IN10 ITS TANK (BS-TI). TH CllT tiMN T HEAT ret?OV SYS + CONT 74 02T 041174 E UPPER 40% OF THE T At4K BUCKLED I t4W A R D. THE SOLUT ICtl W AS AT 40 DEGREES F VESSELS, PRESSURE 000977 2-WEEK r'D THE FLUID IN THE TANK ALPEADY WAS AT 110 DECREES.
NO SUBCOMPONENT PROVIDED P E R S O N t4 E L ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED PUMPING COLD FLUID INTO THE HOT VAPOR SPACE LOWERED PRESSURE IN THE TANK RAPIDLY AND Att OtiLY PARTIALLY LOOSENED BLANK FLAtiGE ON THE VENTLIti[ CAU SED BUCKLING.
THREE MILE ISLAND-1 05000289 041974 DURING PREPARATI0 tis FOR INITIAL FUEL LOADING, All UNPROTECTED UNDERWATER REACTOR VESSEL ItiT ER;! AL S 74 02T 042474 L I Git T BROKE IN THE OPEH REACTOR VESSEL.
RECOVERED ALL StilELD f R AGMEN T S.
OTHER COMPONENTS 000990 2-WEEK REVISED QC PROCEDURES.
(AO-74-1)
SU B C OMP 0 t4 E tit NOT APPLICABLE PERSONNEL ERROR CAUSE SUBCODE NOT !ROVIDED NO MANUFACTURER SPECIFIED USE OF IMPROPER EQUIPMENT.
TiiREE MILE ISLAND-1 05000289 041974 AN UsiPROVEN UNDERWATER LIGHT WAS BROKEN WITHIH Tile OPEN REACTOR VESSEL.
REACTOR VESSEL INTERNALS 74 02T 042474 (AO-74-1)
OTHER C 0f1P 0 tiEt4 T S 010042 2-WEEK SUBC0f tf ONENT NOT APPLICABLE PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED HO MANUFACTURER SPECIFIED THE LIGliT WAS INAPPROPRI ATE i. U S E Ill THE OPEtt VESSEL. AlL L I Gili PIECES WERE RECOVERED.
THREE MILE ISLAND-1 05000289 042274 HIGH REACTOR BUILDItiG PRESSURE SWITCHES WERE FOUND TO TRIP AT 4.15 AtiD 4 REACTOR TRIP SYSTEMS 74 02T 050174
.1 PSIG RATHER THAH EQUAL TO OR LESS T H Ati 4.0 PSIG (AO-74-2?
INS 1 R UMEt4 T A T I 0tl + CONTROLS 010041 2-WEEK NO SUBCOMPONEtiT PROVIDED P E R S O N t4 E L ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED SETPOINT DRIFT. THE SWITCHES liAD BEEtt SET AT 4.0, ALLOWING NO MARGIll FOR pg INSTRUMEtli ERROR. THEY UERE RESET TO 3.75 PSIG N
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APR 18, 1979 LER QUTPUT ON EVENTS AT THREE MILE ISLAND 1 AtlD 2 PAGE'6 FR0f1 1969 TO THE PRESET 4T OUTPUT SORTED BY FACILITY AtiD EVENT DATE FACILIlY/ SYSTEM /
C 0fiP O N L t4 T / C 0t:P O N E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER tt0./
REPORT DATE/
EVENT DESCRIPTI0ti/
C0:1PutlENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTIuN THREE MILE ISLAND-1 05000289 042674 A DET AIL ED INSPECTION OF TiiE CORE INTER!iALS SHOWED ti0 DAMAGE FROM A NUT REAC10R VESSEL I riT ERtl A L S 74 02T 051774 0F FOREIGil ORIGItl.
OlliER C0flP0tlEtiTS 010190 2-WEEK SUBCOMP0t4ENT t10T APPLICABLE C0f1PONENT FAILURE CAUSE SUBCODE fl0T PROVIDED NO mat 4UFACTURER SPE'CIFIED CAUSE OF Tile NUT BEING Iti THE CORE IS UtiKNOWN TilREE MILE ISLAND-1 05000289 051974 DURIt4G SURVEILLANCE TESTING DIESEL GENERATOR 1B STARTED, BUT DID NOT C0tt Ef1LRG GEt4ERATUR SYS + CONTROLS 74 02T 053074 TINUE TO RUN BECAUSE OF A LOW LUBE OIL PRESSURE SIGriAL (AO-74-3)
ELECTRICAL C ot3DUC T O RS 010201 2-WEEK S U B C OT1P O N E N T NOT APPLICABLE PERSONNEL FRROR CAUSE SUBCODE NOT PROVIDED HO MANUFACTURER SPECIFIED MAltlTENANCE PERS0tlNEL HAD LEFT Tile TilREE LOW LUBE DIL PRESSURE SWITCHES DISC 0t4HECTED ON MAY 18.
THREE MILE ISLAND-1 05000289 052174 DURING T61E SetlTROL ROD DRIVE TRIP TEST AND AFTER PATClilNG GROUP 2 ROD 3 REACTIVITY CONTROL SYSTEMS 74 02T 053174 TO GROUP a R0D 2 AtID Sii0R f LY AFT ER TRANSFER OF CROUP 2 R0D 3 TO Tile AUXI CONTROL ROD DRIVE MECHANISMS 010253 2-WEEK LIARY POWER SUPPLY A REACTOR TRIP WAS ACTIVATED AtID VARIOUS SWITCliES At4D SUBCOMPONENT NOT APPLICABLE WIRES DAMAGED. (AD 50-289/74-4)
P E R S 0 tin E L ERROR CAUSE SUBCODE NOT PROVIDED tiO MAtiUFACTUREV SPECIFIED OVERCURRENT CONDITIONS EXISTED BECAUSE OtiLY A POUER PATCil WAS MADE, t10 7 THE LOGIC PATCll. IN ADDITI0ti Tile TEST COULD HOT BE PERFORf1ED AS WRITTEtl.
TilREE MILE ISLAND-1 05000289 053174 DURING llEATUP OF REACTOR C00L AtlT SYST EM A L EAK UAS DISCOVERED lti Tile DIS C00L AtiT RECIRC SYS + CONTROLS 74 02L 061074 CllARGE Et4D PIPE PORTI0tl 0F REDUCING ORIFICE, ABOUT 1" FROM POINT :!flERE O P IP ES, F I T T I tlGS 010204 30-DAY RIFICE ASSEMBLY IS WELDED TO RECIRCULATI0ii L Ill E.
NO S U B C OMP O!!E tit PROVIDED C 0f1P O N E t4 T FAILURE CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED SEVERE EROSIDH OF PIPE WALL.
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APR 18, 1979 LER OUTPUT D tl EVEtiTS AT THREE MILE I SL AtlD 1 AND 2 PAGE 7 FROM 1969 TO Tite PRESEtiT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY /SYaTEM/
C OMP O N E ti T / C OMP 0 t4 E N T SU3 CODE /
DOCKET NO./ E V EllT DATE/
CAUSE/CAUSE SUDCODE/
LER HO /
REPORT DATE/
EVENT DESCRIPTION /
COMP 0tlEtiT mat 4UF ACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTICH THREE MILE ISLAND-1 05000289 053174 A PIllHOLE LEAK WAS DISCOVERED IN THE RECIRCULATION LINE ORIFICE ASSEMBLY COOLANT RECIRC SYS + CONTROLS 74 02T 061074 0F THE 1 "B" MAKEUP PUMP. PREVIOUS ULTRASONIC TESTIllG OF THIS ORIFICE H PIPES. FITTINGS 010256 2-WEEK AD NOT UNCOVERED THE PROBLEM, BEC AUSE PER50titiEL INSPECTED THE UPSTREAM S NO SUBCOMPONENT PROVIDED IDE RATHER THAN THE DOWNSTREAM SIDE. (A0 50-289-74-5)
DESIGti/ FABRICATION ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED llI GH EXIT VELOCITIES CAUSED THE tROSION AT TMI1 AS WELL AS AT ARK 1.
NEW ORIFICES ARE BEING PROCURED.
THREE MILE ISL AttD-1 05000289 063374 LEAK WAS DISCOVE;ED COMING FROM A SOCKE! WELD ON THE WATER SUPPLY LIllE F CHEM, VOL CONT + LIQ POISH SYS 74 02T 061374 ROM TiiE MAKEUP PUMP DISCHARGE HEADER TO THE CORE FLOOD TAliKS. (A0 53-289 P I P E S. F I T T I t4GS 010257 2-WEEK
/74-6)
NO SUBCOMPONENT PROVIDED P E R S O N t! E L ERROR CAUSE SUBCODE NOT PROVIDED N0 f1 AtlUF ACTURER SPECIFIED INSUFFICIENT REINFORCEMENT OF THE WELD ALLOWED A CRACK TO PROPAGATE FROM THE ROOT OF THE WELD OUTWARD.
THREE MILE ISLAND-1 05000289 060474 VARIOUS OUTDATED VALVE AND STARTUP CHECKLISTS FROM OUTDATED PROCEDURES W OIHLR SYSTEllS 74 02T 061474 ERE FOUND 10 llAVE BEEN USED IN TliE COURSE OF PL ANT HEATUP- (A0 50-289/74 OTHER COMP 0tlENTS 010252 2-WEEK
-7)
SUBCOMP0tlENT NOT APPLICABLE P ER 50 tit 4 E L ERROR CAUSE SUBCODE NOT PROVIDEC NO MANUFACTURER SPECIFIED PERSONNEL DID NOT CHECK WHETHER THE PROCEDURES WERE CURREN
T. PROCEDURE
S ON FILE MAINTEtiANCE DID NOT DEFINE RESP 0t4SIBILITIES.
THREE MILE ISL AtlD-1 C5000289 060574 S AMPLES OF PL ANT RIVER WATER DISCliARGE SHOWED FREE CHLORINE AND TOTAL CH ULTIMATE HEAT SINK FACILITIES 74 02X 061174 L ORIllE CONCEtiT R ATIONS OF 0.1 PPM AND 0.3 PPM RESPECTIVELY 30 MINUTES AFT OTilER C OMP 0 ti E N T S 010262 OTHER ER EVOLUTION.
(E.I.
50-289/74-3)
SUBCOMP0tlEtiT tt 0 T APPLICABLE
~ DEFECTIVE PROCEDURES CAUSE SUBCODE f40T PROVIDED MUNITORING APPAP\\TUS WAS BELIEVED TO HAVE FAILED.
NO MANUFACTURLR SPECIFIED NO GUIDFLINES EXIST FOR DETERMINING CHLORINE FEED RATE AS A FUNCTION OF rs)
EXISTIllG CONDITIONS.
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APR 18, 1979 LEP OUTPUT ON EVEtiTS AT THREE MILE ISLAND 1 AND 2 PAGE 8 FR0il 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY Al4D EVENT DATE FACILITY / SYSTEM /
CCf1PONENT/ COMPONENT SUDCODE/
DOCKET NO./ EVENT DATE/
CAUSL/CAUSE SUBCODE/
LER t10./
REPORT DATE/
EVEtiT D E S C R I P T I 0 ti/
COMP 0tlENT MANUFACTURER CONTR01 NO. REPORT TYPE CAUSE DESCRIPTION lilREE MILE ISLAND-1 05000289 060674 SAMPLES OF PLANT RIVER WATER DISCHARGE SHOW2D TOTAL CHLORINE CONCENTRATI ULTIMATE HEAT SINK FACILITIES 74 OlX 061374 OH OF 0.215 ppt 1 10 MINUTES AFTER EVOLUTION AtID 0.25 PPM 50 MINT'IES AFTER OTHER C or1PON E N T S 010261 OTHER EVOLUTI0ti.
(E.I. 50-289/74-4)
S U B C OMP 0 tl Ell T t10T APPLICABLE PERSONNEL ERROR CAUSE SUBCODE t10T PROVIDED SAME PROBLEM OR SIMILAR PROBLEM IN EI 50-289/74-2 AND 3.
HD MANUFACTURER SPECIFIED PROBAulE ERROR IN CHLORINE ANALYSIS.
THREE MILE ISLAMD 1 05000289 060674 OtlE OF FCUR HUCLEAR OVERPOWER TRIP INSTRUMENTS WAS FOUND TO T0 tlAVE AN I REACTOR TRIP SYSTEMS 74 01T 061774 NCORRECT GAIN SETTING CORRESP0tIDItlG TO 20% POWER RATHER THAN Tile DESIRED Itis T RUMEtiT A T ION + CotiTROLS 010355 2-WEEK 5% POWER (A0 50-289/74-8)
NO SU B C 0!1P0H E tit PROVIDED DEFECTIVE PROCEDURES CAUSE SUBCODE tt01 FROVIDED NO MANUFACTURER SPECIFIED TEST AtID INSTRUMEllT SURVEILLANLE PROCEDURES WERE NOT ItiTERFACED SUFFICIE NTLY TO ENSURE PROPER SETTItiGS.
THREE MILE ISLAND-t 05000289 061174 MAKEUP AND PURIFICATION PUMP 1A STARTED Otl A FALSE ENGINEERED SAFEGUARDS CHEM, VOL CONT + LIQ POISH SYS 74 01T 062174 SIGNAL AND RAN FOR A Sil0RT PERIOD OF T IME WITil ITS SUCTION VALVE CLOSED RELAYS 010255 2-WEEK (A0 50-289/74-9) t;0 SUBCOMPONENT PROVIDED PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED tl0 MAtlUF ACT URER SPECIFIED CAUSE PROBABLY WAS INADVERTANT BUI1 PING OF SYSTEM RELAYS DURING INVESTIGA TIVE MAINTENAtlCE.
THREE MILE ISLAND-1 05000289 061374 MAKEUP AND PURIFICATION PUMP 12 WAS RUN FOR 26 SECONDS WITil ITS SUCTION REAC COOL CLEANUP SYS + CONT 74 Oli 062174 VALVE, MU-V72C CLOSED. Tile PUMP Sil A FT COULD tt0T DE TURNED BY HAND IllDICA VALVES 010259 2-WEEK TING IllT E R N A L DAMAGE. (AO-50-289/74-10)
NO SUBCOMPONEllT PROVIDED Pf.RSONNEL ERROR CAUSE SUECODE NOT PROVIDED SIMILAR OCCURRENCE AT TMI 1 COVERED BY (A0 50-289/74-9)
NO MAtlUFACTURER SPECIFIED Tile VALVE WAS NOTED AS BEING OPEN WHEll IN FACT IT WAS CLOSED. THE MECHAti ICAL POSITION INDICATOR WAS NOT WGP. KING.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 11 FRCM 1969 TO Tile PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMP 0t4 ENT / C OMP ollE N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER tt0./
REPORT DATE/
EVENT DESCRIPTION /
C OMP O N Lili MAflUFACTURER C0tiTROL NO. REPORT TYPE CAUSE DESCRIPTION TilREE MIL E ISLAND-1 05000289 091674 PORTIONS OF THE RADIATION MONITORING SYSTEM HAD HOT BEEN CALIBRATED IN A AREA MONITORING SYSTEMS 74 01T 092674 tt0RDAtlCE WITit REQUIREMENTS. OF TIIE TUEtiTY-SIX MONIT ORS f40T CALIBRATED T INSTRUMEtiTATION + C 0 ti T R O L S 010619 2-WEEK WO-THIRDS HAD TilEIR AL ARM AND ALERT SETPOINTS CliECKED. ( AO-50-28 9/ 74-16 )
NO SUBCOMPONENT PROVIDED DEFECTIVE PROCEDURES CAUSE SUBCODE tiOT PROVIDED NO MANUFACTURER SPECIFIED PROCEDURES WERE NOT CONSISTENT WITil EQUIPt1EtiT AtD UNAWAREtiESS OF PLANT M AN AGEMEt1T Til AT Tile PROCEDURAL PRO B L El15 WERE CAUSING INTERRUFTIONS.
TilREE MILE ISLAND-1 05000289 091974 IT WAS DETERMINED PRIOR TO PERFORMING ROUTINE SURVEILLANCE, THAT THE SOD C N i tiMN T HEAT REMOV SYS + CDtIT 74 Oli 093074 IUM HYDROXIDE tat 4K C0tlT AIt4ED 17,677 POUT 4DS OF il A0li WilICll IS IN EXCESS OF OTHER COMPONEHTS 010620 2-WEEK REQUIREMENTS (A0 50-289/74-17)
S U B C OMP 0 t4 E ti T NOT APPLICABLE DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED THE SURVEILLANCE PROCEDURE DID HOT ACCOUNT FOR Tile NA0ll BELOW Tile ZERO L EVEL INDICATION.
TilREE MILE ISLAND-1 05000289 100674 THE RM-AS AUXILIARY AND FUEL liANDLIliG BLDG EXilAUST RADIATION MONITOR IllD LIQ RADIDACT WSTE MANAGMNT SYS 74 03X 102474 ICATED A flIGHER TilAN HORMAL READING. EXPOSURES UERE LESS T il AN L It1I T S IN VALVES 010948 OTitER THE TECif SPECS OR 10 CFR 20. ( N O N R O U T Ill E 10 DAY REPORT 74-02) tio SUBCOMPONENT PROVIDED C OMP O N E t4 T FAILURE CAUSE SUBCODE tiOT PROVILED ORr" dAL REPORT 10/24/74 SUPPLEt1ENTED BY REPORT 11/14/74.
NO MANUFACTURER SPECIFItu lEni IN Tile VACUUM PUMP DISCllARGE DIAPHRAGM VALVE OF Tile RC WASTE EVAPOR A10R THREE MILE ISLAND-1 05000289 100674 FROM 10/6 TO 10/10 SEVERAL UNPLANilED RELEASES OF RADI0 ACTIVE GAS FROM WA LIQ RADIDACT WSTE MANAGMNT SYS 74 03X 110874 STE SYSTEMS III Tile AUXILIARY BUILDING WERE DISPERSED TO O T tier AREAS WITil Oll!ER C0f1PONENTS 010985 O Tile R III THE BUILDIllG-SEE tt0NROUTINE 10 DAY A0-74-02-004 (ND!iROUTINE 30 DAY RE S U B C OMP oll E N T NOT APPLICABLE PORT 74-01)
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED NO MAtlUFACTURER SPECIFIED DISPERSI0tl TO LOW ACTIVITY AREAS, CONTRARY TO DESIGN, WERE CAUSED BY DIR N
TY FILTERS, UtiSE AL ED PELLET R A T I0 tis, DAMAGED AUT0t1ATIC C 0!i T R O L D At1P E R S, PO 4=
OR AND/OR INOPERATIVE CutliROLS.
Nw.
6N
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 12 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVEtiT DATE FACILITY / SYSTEM /
C0t*PONENT/COf1P0HENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER f40./
REPORT DATE/
E V E tlT DESCRIPTI0ti/
C0f1P0HENT f1 AliU F A C T U R E R C 0 ti T R O L NO. REPORT TYPE CAUSE DESCRIPT'ON THREE MILE ISLAND-1 05000289 10087' THE AUXILIARY BUILDitlG EXHAUST MONITGR (RM-A6) ALARMED. A SIf1ILAR CCCURR LIQ R ADI0 ACT USTE MAtlACMNT SYS 74 03X 1026 ENCE WAS REPORT ED IN tioti-ROUTIt4E 10 DAY REPORT (74-01). EXPOSURES WERE L PIPES, FITTINGS 010949 OTHER ESS THAtl TECH SPEC. LIMITS. ( N 014R O U T I N E 10 DAY REPORT 72-03)
NO S U B C OMP O N Elli PROVIDED PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED SUPPLEMENTED BY REPORT Ott 11/14/74 NO MANUFACTURER SPECIFIED Tile PLUG INSTALLED AS A RESULT OF (74-01) WAS ItiST ALL ED ItiCORRECTLY IN T HE LOOP SEAL OF THE WASTE EVAPORATOR STORAGE TANK.
TilREE MILE I S L A t4 D-1 05000289 100974 RADItTION ALARMS WERE RECEIVED FROM THE AUXILIARY BUILDING EXHAUST MONIT L I Q R '. T:10 A C T WSTE MANAGMNT SYS 74 03X 102474 OR (RM-A6). tio PERSONNEL UERE EXPOSED. TECt' SPEC. LIMIT 3 UERE NOT EXCEED PIPE;,'ITTINGS 010950 OTHER ED (t10NROUTINE 10 DAY REPORT 74-04)
NC.b0 COMPONENT PROVIDED PEk JilN E L ERROR iE SUBCODE NOT PROVIDED SUPPLEMENTED BY REPORT Ott 11/14/74 ur AtlUFACTURER SPECIFIE9 THE LOOP SEAL PLUG MAS NOT SUFFICIENTLY TIGHTENED AND A DISK Ott THE RC W ASTE EVAPORATOR FEED TANK RUPTURED BECAUSE OF THE PLUG THREE MILE ISLAND-1 05000289 101074 DURING TEST, MAKEUP PUMP 1A STARTED PROPERLY ON THREE AUTOMATIC INITIATI CHEM, VOL C 0 t4 T + LIQ POISH SYS 74 01T 101874 Oil ATTEMPTS, BUT TRIPPED Oil MANUAL ACTU AT ION. (A0 50-289/74-18)
ELECTRICAL CONDUCTORS 011016 2-WEEK SUSC0f1PONENT tiOT APPLICABLE PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED tio MANUFACTURER SPECIFIED THE WRONG KINO OF LUG WAS USED TO CONNECT A FEEDER CABLE TO THE A PHASE t10 TOR WINDING LEAD. OVER HEATING AtlD CABLE SEVERENCE RESULTED.
T11REE MILE ISLAND-1 05000289 101774 DURING TEST, MAKEUP PUMP IC STARTED Ott TUO AUTOMATIC ACTUATI0 tis, BUT FAI CHEM, VOL CONT + LIQ POISH SYS 74 Oli 102574 LED TO START ON THE TilIRD. MAKEUP PUT1PS 1A AND 1C UERE VERIFIED GPER ADL E CIRCUIT CLOSERS / INTERRUPTERS 011015 2-WEEK
. (A0 50-289/74-19)
NO SU B COI1P 0f t Et4 T PROVIDED COMPONENT FAILURE CAUSE SUDCODE NOT PROVIDED NO MANUFACTURER SPECIFIED A MESTINGHOUSE AIR CIRCUIT BREAKER 50 Dil-P 350 STYLE 25Y4440B1, 1200 At1P 5 AT 4.16 i;V, ilAD A DISLODGED TRIPPING LATCil SPRING WHICil PREVLitTED CLOS p
am Nw U
APR 18, 1979 LER OUTPUT ON EVENTS AT TliREE MILE ISLAND 1 AND 2 PAGE 13 FR0t1 1969 10 THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER HO./
REPORT DATE/
EVENT DESCRIPTION /
COMP 0t1ENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTIDH TliREE MILE ISLfHD-1 05000289 102474 AFTER VENDOR-RECOMMENDED TESTS WERE PERFORMED Otl illE FEEDER BREAKER TO T EMERG GEtiERATOR SYS + C 0 ti T R O L S 74 03X 121074 HE 1B ENGINEERED SAFEGUARDS MOTOR CONTROL C Et4 T ER, IT WAS FOUND TliAT T iiE CIRCUIT CLOSERS / INTERRUPTERS 011086 OTilER OVERCURRENT RELAY COULD TRIP PREMATURELY. (AO-50-289/74-26)
NO SUBCOMP0t1EllT PROVIDED CCMPONLHT FAILURE CAUSE SUBCODE fl0T PROVIDED W ES T ';1G1100 S E ELECTRIC CORP.
THE WESTINGHOUSE DB-50 BREAKER HAD A 1000-AMP OVERCURRENT TRIP DEVICE Wii ICH EXilIBITED MECHANICAL BINDItlG AND WAS REPLACED THREE MILE ISL AtID-1 05000289 102874 RADI0 ACTIVE GAS WAS RELEASED FROM THE REACTOR C00LAtiT DRAIN tat 1K VENT TO LIQ RADI0ACT WSTE MAtlAGMNT SYS 74 01X 110674 Tile MAIN CONDENSER AND WAS DISCHARGED BY THE CONDENSER VACUUM PUMPS TliR VALVLS 010987 O T i!ER OUCH EXIfAUST MONITOR RM-A5. ( N 0tiR OU T I N E 10 DAY REPORT 74-05) fl0 SUBCOMPONENT PROVIDED C 0 f1P O N E N T FAILURE CAUSE SUBCODE t10T PROVIDED HANC0CK CO.
SOME IIANC0CK TYPE 5500 WW VALVES IN THE VENT LIllE LEAKED. Tile VALVES WER E REPAIRED. TECil SPEC. LIMITS WERE NOT EXCEEDED.
TifREE MILE ISLAND-1 05000289 103074 A PUDDLE OF llYDRAULIC FLUID WAS FOUtID ON Tite FLOOR flEAR A Sil0CK SUPRESSO COOLANT RECIRC SYS + CONTROLS 74 01T 110874 R ON Tite PRESSURIZER ELECTROMATIC RELIEF VALVE DISCHARGE LINE. SEE ALSO HANGERS. SUPPORTS, SHOCK,5UPPRSS 011011 2-WEEK (A0 50-289/74-14) (A0 50-289/74-20)
NO SUBCOMPONENT PROVIDED PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED HO NAtlUFACTURER SPECIFIED IMPROPER IllSTALLATION (NO LOCKTITE). THE LOCK NUT LOCSEtlED BECAUSE OF VI BRATION AND THE SUPPRESSOR ROTATED, BREAKING TiiE FLUID RESERVOIR L I tie.
TilREE MIL E ISL AtID-1 05000289 103174 ilIGil PRESSURE INJECTION V ALVE MU-V 16 A FAltED TO OPEN UP0tt A S I C tl A L FROM Er1 ERG COR E C00 lit 4G SYS + CONT 74 01T 110874 Tile C0tiTROL ROOM. DOTH VALVES IN Tile "B" FLOW i ATil AtlD Tile REf1AIllING VAL VALVE OPERATORS 011012 2-UEEK VE IN Tile " A" PATil WERE OPERABLE. (A0 50-289/74-21)
NO SUBCOMPONENT PROVIDED DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED HO MANUFACTURER SPECIFIED INSUFFICIENT PROCEDURAL GUIDANCE REGARDING ADJUSTMENT OF Tile VALVE OPERA rsj TOR VALVE CLOSED LIMIT SWITCH (IT WAS OPEll) CAUSED TifE PROBLEM.
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APR 18, 1979 LER OUTPUT OF EVEttTS AT THREE MILE ISLAND 1 AND 2 PAGE 15 F M 0t1 1969 TO THE PRESENT OUTPUT SORT ED BY FACILITY AtID EVEtlT DATE FACILITY / SYSTEM /
C0f1PONf NT/COMPO!!EN T SUBCODE/
DOCKET NO./ EV Erl T DATE/
CAUSE/CAUSE SUSC00E/
LER tl0./
REPORT DATE/
EVENT DESCRIPTI0ft/
COMPONENT MANUrACTURER C 0ti T R O L NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE IStAND-1 05000289 112074 FOUR HYDRAULIC SHOCK SUPPRESSORS WERE FOUND LOW OR OUT OF FLUID AtlD ONE M A l ti STEAT1 SUPPLY SYS + C 0 tit 74 OIT 112974 WAS FOUllD UPSIDE DOWN. (A0 50-269/74-23) li A'4 G E R S, SUPPO R T S, SH O CK. SUPP RS S 010989 2-UEEK NO S U S C O MP O N E ti T PROVIDED PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED ONE FAILED FROM SEAL DETERIORATI0tl, ONE HAD IMPR01ERLY TIGHTilENED EtID CA PS, OfiE WAS NOT INSTALLED WITH LOCKTITE, ONE WAS NOT REORIEtiTED AFTER DI SCOVERY AND ONE HAD LOOSE FITTIllGS.
.s1RLE MILE ISLAND-1 05000289 112274 DURING ROUTINE SAMPLIt4G OF THE MAKEUP T AtiK AN UNPLANNED RELEASE OF RADIO PF N CSS SAMPLING SYSTEMS 74 01X 120274 ACTIVE GAS OCCURRED. tiONE OF THE TECH SPEC LIMITS WERE EXCEEDED. CHONROU PIPES. I T T It4GS 010958 OTHER TINE 10 DAY REPORT 74-09)
NU SU4 COMPONENT PROVIDED COMP 09ENT FAILURE CAUSt SUBCODE NOT PROVIDED HOKE, I riC.
A SAMPLE LINE FITTING, HOKE CO. SAMPLE BOMB FITTING CA-51, LEAKED AllD WA S REPLACED.
THREE MILE ISLAND-1 05000289 112274 REACTOR COOLANT PRESSURE TRIP SETPOINTS UERE FOUtiD TO BE 1787, 1784 AND REACTOR TRIP SYSTEMS 74 01T 120274 1798 RATHER TII AH 1800 PSIG AND 2356 R A tiler THAtt 2355 PSIG. TRIP S E I T It1GS INSTRUMENTATI0tl + C0tiTROLS 010990 2-WEEK WERE WITilIN THE VALUES UTILIZED IN S AF ETY Atl ALYSIS. (AO-50-289/74-24)
NO S U B C 0t1PO N E N T PROVIDED C 0f1PO N E N T FAItURE C AUSE SUBCOD': NOT PROVIDED WESTINGHOUSE iLECTRIC CORP.
THE WESTINGHOUSE REACTOR COOLANT SYSTEri NARROW RAN'iE PRESSURE TRAtiSMITTE RS MODEL 59PH litD DRIFTED OR BEEN SET T00 CLOSE TO THE LIMIT THREE MILE '. ? t A N D - 1 05000289 112774 FIVE MAIH STEAM LIllE HYDRAULIC SHOCK SUPPRESSORS WERE FOUND TO hAVE UNUS MAIN STEAM JUPPLY SYS 4 CONT 74 01T 120674 UALLY LOW LEVELS OF HYDRAULIC FLUID IN THEIR RESERVOIRS. TilIS IS NOW NOT H At{GE RS #dPPORTS,$ HOCK,SUPPRSS 011024 2-WEEK CONSIDERED AN ABilDRt1AL OCCURREtiCE. (A0 50-289/74-25)
NO S U S C 0t1P O N E tl T PROVIDED C 0t!F'G N E N T FAILURE CAUSE SUBCODE NOT PROVIDED HO MANUFACTURER SPECIFIED LEAKS DEVELOPED IN FITTINGS AND RESERVOIR END CAPS WHICH ALLOWED FLUID L 055.
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APR 18, 1979 LER DUTPUT ON EVEtiTS AT THREE MILE ISLAND 1 AND 2 PAGE 17 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C 0t1P O N E t4 T / C OMP 0 ti E ti T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUCCODE/
LER fl0./
REPORI DATE/
EVENT DESCRIPTION /
COMPONENT MANUFACTURER CONTROL NO. REPORT lYPE CAUSE DESCRIPfl0N TliREE MILE ISLAND-1 05000289 121374 DURING SURVEILLANCE TESTING SEVERAL ENGINEERED SAFEGUARDS COMPONENTS WER ErlERG CORE COOLING SYS + CONT 74 OIT 122374 E INADVERTENTLY ACTUATED. C0t1PotiEtils ACTU AT ED INCLUDED THE 1C MAKEUP PL'M CIRCUIT CLOSERS / INTERRUPTERS 011163 2-WEEK P,
THE IB DIESEL, THE 1B DECAY HEAT PUt1P AND SEVERAL VALVES. CAO S0-2S 9 NO SUBC0fiPONEtiT PROVIDED
/74-29)
C OMP 0 tI E N T FAILURE CAUSE SUBCODE NOT PROVIDED HO MANUFACTURER SPECIFIED TfiE HOLDING COIL (A3C2) ON MASTER SPECIALTIES MOMEtiTARY PUSH BUTT 0ti (TYP E 10E) DID NOT l10LD THE GROUP RESET I ti LONG ENOUGH TO FINISH THE TEST.
T.
THREE MILE ISI AtiD-1 05000289 121474 ONE SHOCK SUPPRESSOR IN THE COOLING WATER SUPPLY LINE TO THE SPENT FUEL S P E ti T FUEL POOL COOL + CLEANUP 74 C1T 122474 POOL COOLERS WAS FOUND EMPTY OF liYDRAULIC FLUID. (AO-50-239/74-30)
HANGERS, SUPPORTS, SHOCK,5UPPRSS 01116?
2-WEEK tiO SU B C 0i'P O N Eti T I' R O V I D E D PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED GRINNELL IrlDUS TRI AL PIPING, IN THE GRINNELL SHOCK SUPPRESSOR END CAPS WERE NOT SUFFICIENTLY DRAWtl TOGET HER BY THE _CONtiECTING BOLTS. BOLTS WERE RE10RQUED.
THREE MILE ISLAND-1 05J00289 121674 A REEVALUATION OF THE SEISMIC QUALIFICATION OF THE CONTROL ROD DRIVE AC REACTIVITY C0tiTROL SYSTEMS 74 03L 011575 BREAKER CABINET ATTACHMENT TO THE FLOOR ItlDICATED THAT IT MAY BE It4 ADEQ A OTHER COMP 0tiENTS 011251 30-DAY T E TO WIT"ST AtlD EARTilQUAKE ACCELER AT ION LEVELS. (N0ti-ROUT ItiE 30 DAY REPR SUBCOMPONENT NOT APPLICABLE RT 74-02)
DESIGN / FABRICATION ERROR CAUSE SUDCODE liOT PROVIDED NO MAtiUFAC1URER SPECIFIED PROPOSED MODIFICATIONS ARE UtiDER REVIEW THREE MILE ISLAND-1 05000289 121974 TWO OF SIX CONCRETE FOOTINGS FOR DHH-117, A RIGID PIPE SUPPORT FOR THE O RESIDUAL HEAT REMOV SYS + C 0 tit 74 03L 011775 UTLET VALVE OF THE B DECAY HEAT R Ef10 V A L COOLER (DH-V-198B), WERE FOUtiD T HANGERS, SUPPORTS, SHOCK,5UPPRa5 011249 30-DAY 0 BE CRACKED. CHONROUTINE 30 DAY REPORT 74-03)
NO SU3 COMP 0tiLNT PROVIDED DESIG!i/FABRICATIOri ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURLR SPECIFIED DESIGN WAS ItiADEQUATE AND NEW FOOTINGS WILL BE INSTALLED.
PQ 4s N
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APR 18, 1979 LER DUTPUT ON EVEtiTS AT THREE MILE ISLAND 1 AND 2 PAGE IS FRO 1 1969 TO T HE P P,ES tili OUTPUT SORTED BY FACILITY AtiD EVENT DATE FACILITY /SYSTEf1/
COMPONLNT/C0f1PONENT SUBCODE/
DOCKET NO./ E V Ell T DATE/
CAUSE/CAUSE SUBCODE/
LER HO./
REFORT DATE/
EVENT DESCRIPTION /
C OMP O N E t4 T M A N U F A C T U R E F.
CONTP7L tt0. REPORT TYPE CAUSE DESCRIPTI0ti THREE MILE ISL AtlD-1 05000289 122474 DURING SURVEIL L AtiCE TESTING OF Er1ERGEllCY DIESEL GENERATOR 1B, A S!1 A L L FI LMERG GENERATOR SYS + C0tiTROLS 74 01T 010375 RE I ti Tile LAGGING AROUND Tile NAHIFOLD OCCURRLD AtID WAS EX T I tt G I S H E D. NO D ENGIt1ES. INTERNAL C0t1B U S T I O N 011226 2-WEEK At1 AGE WAS APPARENT. (A050-239/74-31)
SUBC0tiPONEt4T NOT APPLICABLE DESICti/ FABRICATION ERROR CAUSE SUBCODE NOT PROVIDED FAIRBANKS MORSE OIL FROM AN INSPECTION COVER PLATE JOIrlT LEAKED ON TO THE MANIFOLD. PERM ANENT OIL DEFLECTOR PANS Oil THE FAIRB AtlKS T10RSE UNIT MAY BE OBTAItiED. (S LE A0 74-07)
THREE MILE ISLAND-1 05000289 122674 A VIOLATION OF CONTAltiMENT INTEGRITY OCCURRED FOR SEVERAL MUNUTES WHEll T REACTOR CON T AltiMENT SYSTEMS 74 01T 010675 llE OUTER DOOR ON THE REACTOR DUILDIllG PERSONtlEL ACCESS HATCll WAS 6 INCHE PEtiETRATIONS,PRIMRY CONTAINMNT 011227 2-WEEK S AJAR AND THE INNER DOOR WAS OPEt4ED. (A0 50-28o/74-32)
NO SUBCOMPONENT PROVIDED DESIGN /FABRICATI0tl ERROR C AUSE SUBCODE tiO T PROVIDED NO MANUFACTURER SPECIFIED Tile CUTER DOOR WAS NOT PROPERLY CLOSED, BUT Tile LIMIT SUITCli WilICH PROVI DES C0t1 TROL R 00id INDICATION WORKS OFF THE LATCH BAR RATHER T H A ti FROM THE DOOR ITSELF.
THREE MILE ISLAND-1 05000289 123074 DURING SURVEILLANCE TESTING, THE DECAY HEAT PUMP SUCTION VALVE FROM TifE RESIDUAL IfEAT REMOV SYS + CONT 74 OIT 011075 BORATED WATER STORAGE TANK (DH-VSA) FAILLD TO CLOSE. THE REDUNDAt4T VALVE CIRCUIT CLOSERS / INTERRUPTERS 011228 2-WEEK WAS OPERABLE. (AO-50-289/74-33) 11 0 S U B C oi1P O N E ti T PROVIDED COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED t10 MANUFACTURER SPECIFIED Tile MOTOR CIRCUIT BREAKER FOR THE VALVE IIAD TRIPPED DECAUSE OF A BROKEN AND CHATTERIllG AUXILIARY CONTACT IN IIE MCDEL A20CCC T10 TOR STARTER.
TilREE MILE ISLAND-1 05000289 010175 DURING PREPARATI0tl FOR REMOVAL OF THE PLENUM ASSEMBLY FROM Tile REACTOR V REACTOR VESSEL INTERtlALS 75 03L 013075 ESSEL, IT WAS NOTED THAT Tile SPHERIC AL tt u T ON T 5tE ItiT ERtl AL S tl AtIDL ING FIX O Tile R C 0f1P O N Eti T S 012099 30-DAY TURE WAS tt0T SECURED TO Tile THREADED ROD. THIS aLSO PERTAINS TO TMI2. (il SUBC0fiPONENT NOT APPLICABLE OH-ROUTIllE 30 DAY REPORT 74-04)
DESIGN / FABRICATION ERROR CAUSE SUDCODE tt0T PROVIDED NO r1ANUFACTURER SPECIFIED POOR DESIGN. A FIELD CifAt{GE WAS MADE TO STAKE THE SET SCREWS AND DRILL A Il0LE IN THE ROD TO PAPTURE Tile SET SCREW. WILL ALSO BE DONE FOR TMI2 PJ 4s DA
&W
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 19 FROM 1969 TO THE PRESET 1T GUTPUT SORTED BY FACILITY AtiD EVENT DATE FACILITY / SYSTEM /
C0fPUNFNT/ COMPONENT SUBCODE/
DOCKET NO./ EVEt4T DATE/
CAUSE/CAUSE SUBCODE/
LER HO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONEtil NANUFACTURER C0tiTROL NO. REPORT TYPE CAUSE DESCKIPTION THREE MILE ISLAND-1 05000289 010375 REACTOR BUILDING EMERGENCY COOLING RIVER WATER PUTIP (RR-PIB) FAILED TO S STATIGH SERV WATER SYS + C u tt i 75 01T 011375 TART ON A TEST S I G t1 A L. THE REDutiDAtiT PUMP (RR-P1A) DID START. LLE A0 50-CIRCUIT CLOSLRS/IllTERRUPTERS 012102 2-WEEK 289/75-01 (A0 50-239/75-02) 11 0 SUBCOMPONEt1T PROVIDED D E S I Gil/ F A B R I C A T I O N ERROR CAUSE SUBCODE NOT PROVIDED WESTIllG!!OUSE ELECTRIC CORP.
SEVERAL LOOSE CONtiECTIONS Iti THE BREAKER CAUSED IT fiOT TO CLOSE. ALL 4KV ES BREAKERS WILL BE CHECKED FOR THIS PROBLEM THREE MILE ISLAND-1 05000289 010375 DURING TEST, ilIGH PRESSURE IllJECTION PUMP MU-PIC FAILED TO START ON All A LMERG CORE COOLING SYS + CONT 75 OIT 011375 UTOMATIC ENGINEERED SAFETY FEATURES TEST SIGNAL. IT ALSO WOULD NOT START CIRCUIT CLOSERS / INTERRUPTERS 012103 2-WEEK FROM THE C0t4 TROL R 0 0T1. REDUt4 DANT PUMP MU-PIA STARTED. (A0 50-289/75-01)
NO SUBCOMPONENT PROVIL)ED DESIGN / FABRICATION ERROR CAUSE SUBCODE NOT PROVIDED WESTINGHOUSE ELECTRIC CORP.
A LOOSE TERMItiATI0ti ON THE WESTINGHOUSE 50-Dil-P 350 BREAKER RELEASE DID NOT ALLOW Tile BREAKER TO CLOSE. THE BREAKER WAS REPLACED.
THREE MILE ISLAND-1 05000289 010475 (ER 7 5-30D-1)M0tiTHLY COMPOSIT E OF WEEKLY GR AB S AMPL ES( 1/4-25) 0F SURFACE SYSTEf1 CODE t10T APPLICABLE 75 04X 041875 RIVER WATER COLLECTED ABOUT 1/2 MILE DOWNSTREAM FROM THE TMI-1 RIVER DI Cor:P0t1ENT CODE NOT APPLICABLE 015687 OTHER SCHARGE HAD A TOTAL TRITILM ACTIVITY OF 1.67 E-6 MICROCI/CC. THIS VALUE SUBCOMPONLNT NOT APPLICABLE IS G.T.
4 TIMES THE C0tiTROL STATION VALUE OF 2.5 E-7 MICROCI/CC. THE tiEX clitLR T RIVER S AMPL E FROM TliE S AME LOC AT IOil READ NORt1AL.
CAUSE SUBCODE NOT PROVIDED ITLM NOT APPLICABLE IT IS BELIEVED THAT THE GRAB S AMPL ES WilICH FORMED TilIS COMPOSITE WERE TA KEt1 DURING PERIODS OF CONDENSATE S10 RAGE TANK DISCHIRGE AND, ACCORDINGLY DURING PERIODS OF llIGHER-THAN-NORMAL RIVER WATER TRITIUt1 LEVEL.
TilREE MILE ISLAND-1 05000289 012375 DURItiG MAINTENANCE, THE PRLS3URIZER SPRAY BLOCK VALVE WAS CLOSED (RC-V3)
CHEM, VOL CONT + LIQ POISH SYS 75 01T 020275 VALVE STEM LEAKOFF TO Tile VENT tlEADER INCREASED TO 10 C F T1. Tills OVER P OTHER COMP 0tiENTS 012100 2-WEEK RESSURIZED Tile HEADER COVER GAS AND RELEASED RADI0 ACTIVITY (AO-50-239/75 SUBCOMPONEt1T NOT APPLICABLE
-04)
DESICN/ FABRICATION ERROR CAUSE SUBCODE NOT PROVIDED ADDITIONAL I tiFO RM A T I 0 tl IN ACCORDANCE WITil 10 CFR 20.40S (A) WILL DE SEllT NO MANUFACTURER SPECIFIED I ll.
THE OVERPRESSURE CAUSED UATER LOSS IN Tif E RECL Alf1ED DORIC ACID TANK OVER FLOW LOOP SEAL WHICH RELEASED THE GAS.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 21 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C0t1PONENT/ COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUCE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVEtli DESCRIPTIOrl/
COMP 0tlElli f1ANUFACTURER C0tiTROL NO. REPORT TYPE (AUSE DESCRIPTI0ti THREE hlLE ISLAND-1 05000289 021075 FROM 1/31/75 TO 2/9/75 C 0 t{ T R O L ROD 6/6 ABSOLUTE POSITIUti INDICATOR WAS 7 REACTIVITY CONTROL SYSTEMS 75 OIT 022175 TO 10 *. LOWER THAN THE GROUP 6 AVERAGE. Tile REL ATIVE POSITI0t1 I tIDI C A T OR C 0 ti T R O L RODS 012144 2-WEEK INDICATED OtiLY A HINE INCil DI F F ER E tic E AND Ti!E ABSOLUTE It4DICATOR WAS INC SUBCOMPONENT NOT APPLICABLE ORRECTLY JUDGED TO BE Iti ERROR. (A0 75-5)
PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED PROCEDURES D50 NOT REQUIRE A THOROUCll INVESTIGATION OF DISCREFANCIES AND PREVIOUS Pr.0BLEMS LED PERSONNEL ASTRAY. NO SAFETY LIMITS UERE EXCEE3ED, THREE MILE ISLAND-1 05000289 022475 A LOSS OF VENTILATION AIR FLOW THROUGH THE AUXILIARY BUILDItiG LED TO A B FIRE PROTECTION SYS + CONT 75 01L 040275 UILDUP CF RADI0 ACTIVE GASES IN THE BUILDING. All UtiPL ANtiED RELEASE OF Tile INST RUMEtiT A T I0tt + CONTROLS 012416 30-DAY SE T1ATERIALS OCCURRED IN CONCENT R ATI0tl5 UITHIti LIMITS BUT GREATER Tli A ti il NO SUBCOMP0t{LitT PROVIDED ORMAL FOR A PERIOD OF APPROXIMATELY 2 Il0URS AND 26 MI tiU T ES. ( N 0 tiro U T I riE COMPONENT FAILURE 30 DAY REPORT) 50-289/75-02)
CAUSE SUBCODE tiOT PROVIDED SOURCE OF RADI0 ACTIVE LEAKGE IS NOT YET KNOWti. RADI0 ACTIVITY AND EXPOSUR NO MAtiUFACTURtR SPECIFIED 2 WERE WITHIti LIMITS.
LOSS OF VENTILATION UAS DUE TO AN INADVERTANT ACTIVATI0tl 0F THE AIR IllT A KE tut 4NEL DELUGE FIRP PP"TECTION SYSTEM BY A FAULTY TEMPERATURE SENSOR.
THREE MILE ISLAND-1 05000289 031075 IT WAS DISCOVERED TilAT TiiE SLIDE BEARItlG PLATES OH OtlE OF Tile IIEATED POS M A l ti STEAM SYSTEMS + CONTROLS 75 01L 040275 TS IN THE MAIN STEAt1 SUPPORT SYSTEt1 WERE NOT T1AKING CONT ACT. tiOTIFICATIO HANGE 5, SUPPORTS, SHOCK,5UPPRSS 012562 30-DAY N WAS BY AL ARM ON THE SUPPORT MONITORIttG SYSTEt1. GAP WAS 0.010 IN. COMPA NO SUBCOMPONENT PPOVIDED RED TO A CALCULATED MAXIMUM ALLOWABLE GAP OF 0.02749 IN. (NON-ROUTIrlE 30 DESIGti/FABRICATI0ti ERROR
-DAY REPORT 75-03, SUPPLEMENTED BY MAY 2, 1975 LETTER.
CAUSE SUBCODE t10T PROVIDED tiO MANUFACTURER SPECIFIED SYSTEM REDESIGli 0F SHUBBERS ARE BEIllG CONSIDERED. IN THE MEANTIME, WEEKL Y INSPECTI0tlS OF THE GAP ARE MADE TO ENSURE TilAT UNACCEPTABLE CONDITIONS DO tiOT DEVELOP.
THREE T1ILE ISLAND-1 05000289 031275 DURING SURVEILLANCE TESTING, REACTOR BUILDING Et1ERGENCY COOLER ItiLET VAL C t1 T imH T tiEAT REMOV !)S + CONT 75 OIT 032175 VE (RR-V3C) FAILED IN THE CLOSED POSITION. TWO OTilER IHLET VALVES WERE O VALVE OPERATORS 012316 2-UEEK PERABLE AS WERE BOTH PATilS OF THE RB SPRAY SYSTEM. (A0 50-289/75-06)
NO S U B C OMP O N EliT DROVIDED DESIGN / FABRICATION ERROR CAUSE SUBCODE NOT PROVIDED lit 11 TORQUE CORP.
A LOCKNUT ON LIMITORQUE VALVE OPERATOR SIZE SMBO WAS STAKED ON THE BODY RATifER THAN Oil THE TilREADS. IT WAS THEN STAKED PROPERLY.
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APR 18, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND t AND 2 PAGE 26 FROM 1969 TO THE PRESElli OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMP 0hENT SUBCODE/
DOCKET H0./ EVENT DATE/
CAUSE/CAUSE SUCCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONEtlI MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTI0tl THREE MILE ISLAND-1 0$000289 061875 (AO-75-19) DURING TESTING OF ALL 4 RPS CH ANNELS TO DET ERf1IllE INSTRUMENT REACTOR TRIP SYSTEMS 75 01T 062775 DRIFT AS SPECIFIED Ill A0-75-16, IT WAS FOUND THAT THE LOW PRESSURE TRIP Itis T RUMEN T A T I0tt + C0 tit RO L S 012916 2-WEEK SETPOINT FOR 1 RPS CHANtiEL WAS LESS C0t4SERVATIVE THAN REQUIRLD BY TECHNI NO SUBCOMPutiltlT PROVIDED CAL SPECIFICATIONS COMPONEtli IAILURE
~
( 1831.2 MEASURED VS. 1831.5 REQUIRED).
CAUSE SUBCODE NOT PROVIDED BAILEY IllSTRUMEt4T CO..
INC.
SET POINT DRIFT OF THE BAILY SYSTEM 880 RPS. fHE CHANNEL WAS RECALIBRATE D.
THE 4 RPS CHANNELS WILL BE TESTED WEEKLY UNTIL CAUSE OF DRIFT IS DETE RMINED.
THREE MILE ISLAND-1 05000289 062275 (AO-75-20). WHILE RETURNING TO FULL POWER OPERATI0tl AFTER A FORCED POWER REACTOR CORE 75 01T 070275 REDUCTION, REACTOR POWER WAS It1 CREASED ABOVE THE POWER LEVEL CUTOFF BEF COMPONENT CODE NOT APPLICABLE 012946 2-WEEK ORE XENON REACTIVITY WAS ASYM?TOTICALLY APPROACHING STABILITY. THIS VIOL SUBCOMPONENT NOT APPLICABLE ATED A LIMITING C0tIDITI0ti FOR OPERATION AS SPECIFIED Iti T.S.
3.5.2.5.C.
DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED INADEQUATE PROCEDURES. OPERATORS WERE BRIEFED AND PROCEDURES UNGRADED.
THREE MILE ISLAND-1 05000289 062575 (AO-75-21). DURING ROUTIt4E SURVEILLANCE OF Tile REACIOR PROTECTION SYS.Ef1 REACTOR TRIP SYSTEMS 75 0'T 070375 THE REACTOR COOLANT TEMPERATURE TRIP BISTABLE FOR CHANNEL C FAILED TO INSTRUMENTATI0tl + CONTROLS 012947 2-WEEK TRIP. THE REMAINING 3 RPS CHANNELS WERE FOUtID TO BE OPERABLE. ONLY 2 CHA 11 0 SUBCOMPONENT PROVIDED NilELS ARE REQUIRED FOR SAFETY PROTECTI0tl.
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED BAILEY INSTRUMENT CO.,
I tic.
DEFECTIVE PRINTED CIRCUIT BOARD SOLDER JOTIT IN THE BAILEY SYSTEM 880 RP S SIGNAL C0tiVERTER (E92-346). DEFECTIVE CHANNEL WAS REPAIRED AtID TESTED.
THREE MILE ISLAND-1 05000289 06267S (NON-ROUTINE 10 DAY REPORT 75-03). FOR ABOUT 7 HOU"S, THERE WAS AN INADV GAS RADIDACT USTE MANAGMNT SYS 75 43T 070375 ERTANT RELEASE OF RADI0 ACTIVE MATERIAL UHILE ADDING UATER TO THE t1AKEUP OTHER COMP 0tiENTS 012944 2-WEEK T ANK AND THE REACTOR C00!. ANT BL EED TANKS. RELEASE MAS FROM AN EVAPORATOR S U B C OMP 0t1EN T t10 T APPLICABLE TO GAS VENT HEADER SYSTEM. NO T.S.
LIMIT 5 WERE EXCEEDED.
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED fl0 NANUFACTURER SPECIFIED LEAKS Ill EI tiler THE MISCELLANEOUS WASTE EVAPORATOR OR THE ASSOCIATED PIP ING. EVAPORATORS WERE ISOLATED. THE EXACT l.0 CATION OF ThE LEAK IS BEIt4G OUGHT AND WILL BE REPAIRED.
p 4s
's!
'w]
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 27 FROM 1969 TO THE PRESET 1T DUTPUT SORTED BY FACILITY AND EVEtiT DATE FACILITY /SYSTEf1/
COMP 0t1Et T/CCMPONENT SUBCODE/
DOCKET NO./
t VEtiT DATE/
2 CAUSE/CAUSE SUBCODE/
L ER tio./
REPORT DATE/
EV Ell 1 DESCRIPTION /
COMPUNENT MANUFACTURER C0tiTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 070375 (ER 75-4) IT WAS DISCOVERED ON 7/3 THAT DURING THE RELEASE OF THE WASTE POTABLE + S Atl LATER SYS + CONT 75 04T 071075 tlEUTRALIZIt4G TANK ON 6/6 THAT THE C0tiCEllTRATION OF SUSPENDED SOLIDS !!EAS COMPONENT CODE t10T APPLICADLE 015691 2-WEEK URED AT THE PLANT RIVER WATER DISCHARGE EXCEEDED THE LIMIT OF S60 PPf1 BY S U B C O MP O N Elli NOT APPLICABLE 24 PPM. THE SUSPENDED SOLIDS CONCENT OF THE TANK PRIOR TO DISCHARGE WAS EXTERNAL CAUSE 5 PFM CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE 1.25 INCHES OF RAINFALL THE PREVIOUS DAY MADE THE RIVER RISE 0.24 FEET A ND HAVE SU3 PENDED SOLIDS G.T.
ETS, 50 IT WAS IMPOS$1BLE TO DISCHARGE L.T ETS.
THREE MILE ISLAND-1 05000289 071175
( AO-7 5-22 ). DURIt1G ROUTINE ItiSPECTION, TWO LEAKS WERE DISCOVERED IN SOCK C 0 til1N S A T E + F2FDWTR SYS + CONT 75 01T 072175 ET WELD JOINTS OF THE MAKE-UP PUMP (MU-PIA) SUCTION V E ti T LINE LEADIt1G TO PIPES,FITTDMS 013009 2-WEEK VALVE MU-V156A. THIS CONSTITUTED Ali ABNORMAL DEGRADATION OF A SYSTEM B0 NO SUccoranurur "RuVIDED UNDARY DESIGNED TO CONTAIN RADI0 ACTIVE MATERIALS. (T.S.I.8E).
PEPSONNEL ERRCR CAUSE SUBCODE NOT PROVIDED NC MANUFACTURER SPECIFIED VIOLATION OF INSTALLATION PROCEDURES TO ALLOW SUFFICIENT FLEXIBILITY OF PIPE TO PREVENT CYCLIC FATIGUE FAILURE. PUMP ISOLATED AND SYSTEM MODIFIE D.
SIMILAR SYSTEMS INSPECTED TilREE MILE ISLAtlD-1 05000239 071675 (AO-75-24). DURING MAINTE: LANCE, DISCHARGE VALVE t1R-VID OF RIVER WATER PU EMERG COPE C00 lit 1G SYS + CONT 75 Oli 072575 MP t1R-PIB FAILED TO CLOSE BY REMOTE CONTROL. UP0tl MANUAL CLOS!NG THE VAL VALVE OPERATORS 012985 2-WEEK VE WOULD NOT OPEN WHEil THE PUMP WAS STARTED. HONEVER, THE VALVE FAILED S NO SUBCOMP0NElli PROVIDED AFE. REDUNDANT PUMP AND ITS VALVE WERE OPERABLE.
COMPONENT FAILURE CAUSE SUDCODE il0T PROVIDED N0 f1ANUFACTURER SPECIFIED MOTOR WINDING FAILURE DUE TO INEFFECTIVE OVERLOAD PROTECTION. FAILED MOT OR REPLACED. MOTORS CHECKED TO ASSURE ADEQUACY. ItiVESTIGATION OF FAILURE C AUSE C0tiTIt1UES. RELIANCE MOTOR 447166-DU.
TilREE MILE ISLAND-1 05000289 071675 (AO-75-23). DURING A MAINTENANCE TEST Ott THE IB D/G, THE 81X1 AUXILIARY Et1 ERG GENERATOR SYS + CCHTROLS 75 01T 072575 RELAY DID NOT ENERGIZE WHEN REQUIRED. THE PELAY CONTACIS ARE 'JSED It! A 2 RELAYS 012939 2-WEEK OUT OF 3 LOGIC THAT PERMITS THE tB D/G DREAKER G11-02 TO CLOSE WHEN THE NO SUBCOMP0tlENT PROVIDED D/G IS UP TO SPEED. THE B D/G REMAltlED OPERABLE *.ho THE A D/G WAS OPERA DESIGt1/FABRICATI0li ERROR BLE.
CAUSE SUBCODE t10T PROVIDED WESTIllGHCUSE ELECTRIC CORP-t1ANUFACTURING DEFECT IN Tile WESTINGHOUSE tiG-6, 125 DC RELAY. RELAY WAS R EPLACED AND SIMILAR RELAYS INSPECTED FOR PROPER MANUFACTURE. THE MANUFAC TURER WAS NOTIFIED.
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4
d APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGF'29 FROM 1969 TO TifE PRESENT CUTPUT SORTED BY FACILITY AND EVEtli DATE FACILITY /SYSTLM/
C O MP U N Lt4 T / C OMP 0 H E rl T SUSCODE/
00CKET NO./ EVENi DATE/
CAUSE/CAUSE SUDCODE/
LER NO./
REPORT DATE/
EVEtlT DESCRIPTI0ti/
COMPONENT MANUFACTURER C0tiTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 080275 (ER 75-7D-3) THE MotlTHLY COMPOSITE OF WEEKLY GRAB S AMPL ES (8/2-30) 0F RI SYSTEM CODE NOT APPLICABLE 75 04X 102475 VER UATER COLLECTED 0.5 AtiD 1.5 MIL ES DOUNSTRE All FROM THE DISCHARGE SHOU C 0f1P O N L t4 T CODE tiOT APPLICABLE 015900 OTHER ED TRITIUM C0tiCEtiTRATICNS OF 3.9+-0.09 PCI/L. AND 2.72+-0.08 PCI/L. RESP SUBCOMPONEt4T 110T APPLICABLE ECTIVELY. TiiESE VALUES ARE GREATER THAN T Ett TIMES IllE CONTROL STATION VA EXTERNAL CAUSE LUE OF 0.25 PCI/L.
CAUSE SUBCODE NOT PROVIDED ITE!1 NOT APPLICABLE THE CAUSE OF THIS OCCURRENCE IS ATTRIBUTED TO LOM RIVER FLCM RATES ASSCC I ATED WITil LOW SUMMER PRECIPITATICH RATES WHICH ARE BELIEVED TO HAVE RED UCED THE NORMAL MIXItiG OF EFFLUENTS ABOVE YORK llAVEN D All.
THREE MILE ISLAND-1 05000r89 080475 (ER 75-6) Tile DISSOLVED SOLIDS C0flCENTRATION AS MEASURED AT Tite PLANT RI POTABLE + S A ti LATER SYS + C 0!i T 75 04T 080975 VER WATER DISCllARGE EXCEEDED 700 PPM, WHICil IS A VIGLATION OF THE ENVIRO C0f1PONENT CODE fl0T APPLICABLE 015693 2-WEEK NMENTAL TECHNICAL SPECIFICATI0 tis, PARAGRAPH 2.2.2A, AtiD CC.4STITUTES A LI SUBC0f1PONEt4T NOT APPLICABLE MITItiG CONDITI0tl FOR OPERATION.
DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE THE APPARENT CAUSE OF THE INCIDEtiT IS PROCEDURE, IN TilAT ill? WAST E B ASIN S WERE BEItiG DISCHARGED AT T00 GREAT A RATE (750 GPM), FOR DILUTION WITil RIVER WATER TO BE EFFECTIVE.
TilREE MILE ISLAND-1 05000289 081575 (fiON-ROUTINE 30 DAY REPORT 75-07). IT WAS DISCOVERED THAT MAlti STEAM VAL MAIN STEAM SUPPLY SYS + C0 tit 75 99L 093075 VES MS-V-4A AtlD B AND Et1ERGENCY FEEDWATER VALVES EF-V-30A AND B WERE NEV VALVES 013448 30-DAY ER ANALYZED TO SEISMIC CLASS 1 REQUIREf1ENTS. TifESE WERE SUPPLIED BY EEU NO SUBCOMPONENT PROVIDED TilROUGli B AIL EY T1ET ER C0f1P ANY. REQUIREllEtli UAS OVEP,LOOKLD WHEti THE SYSTEM DESIGrl/ FABRICATION ERROR WAS UPGRADED IN SEISNIC CLASSIFICATION.
CAUSE SUBCODE fl0T PROVIDED BAILEY METER C0f1PANY I"*hEQUATE INTERFACE CONTROL BETWEEN MET-ED, GILBERT ASSOCIATES, At4D BZW oALCULATIONS WERE PERFORf1ED AND SHOW TilAT Tile VALVES ARE CAPABLE OF WI lif ST AtlDING SEISMIC CL ASS 1 L O ADIllGS.
TifREE MILE ISLAND-1 05000289 081575 (ER 75-7) ON AUGUST 3, WATER WITH A TEMPERATURE 5.5 F BELON THE AMBIENT ULTIMATE liEAT SINK FACILITIES 75 04T 082275 RIVER TEMPERATURE (90 F AT TliE TIME) UAS DISCHARGED FROM THE T1ECHAllICAL COMPONENT CODE h3T APPLICABLE G15694 2-NEEK DRAFT COOLING TOUER. ?HIS TEMPERATURE DROP OCCURRED WHEtt THE CONTP,0L ROD SUSC0f1PONENT NOT APPLICABLE M OPERATOR SWITCHED FROM THE "A" COOLING TOWER FAN TO THE "C" FAN, WilICH PERSONNEL ERROR HAS A SLIGliTLY GREAT ER COOLING CAP ACITY.
CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE Tim CONTROL ROOM OPERATOR FAILED 10 PROPERLY MONITOR THE EFFLUENT T Et*P E R RTURE AND DELTA T RECORDER AFTER FAN SUITCifING TO INSURE Til AT TilEY H AD S P')
TABILIZED.
,w D
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LUA RC EDEI A
DC C
T O1R AE NEWT RD 0
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APR 18, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 32 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENi/ COMPONENT SUBCODE/
DOCKET NO./ EVEtli DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCR" 'T ION /
COMPONENT MANUFACTURER CUNTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 090375 (NON-ROUTINE 30 DAY REPORT 75-06). THE ANNUAL llYDR0 GRAPHIC SURVEY SHOWED Ef1 ERG CORE COOLING SYS + CONT 75 99L 091175 AN EXCESSIVE AMOUNT OF SEDIMENT IN THE INTAKE CHANNEL SINCE IT UAS LAST C 0t1P 0 tl Ell T T9DE NOT APPLICABLE 013320 30-DAY DREDGED. THE CHAT!NEl. WAS CREATED TO PROVIDE ADEQUATE COOLING WATER FOR SUBCOMPONENT NOT APPLICABLE EfFRGENCY SHUTDOWN Id EVENT OF LOW RIVER FLOW AND FAILURE OF THE YORK liA OTHER V Etl D '4 M.
CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED SHORT TERM ACTION IS TO KEEP CLOSE SURVEILLANCE OF RIVER FLOW AND DAM CO NDITION. LONG TERM CORRECTIVE ACTION IS TO DREDGE THE INTAKE CHANNELS. S URVEY5 0F CHANNELS WILL BE INCREASFD.
THREE MILE ISLAND-1 05000289 091775 (40-75-31).
"B" CORE FLOOD TANK LEVEL TRANSMITTER CALIBRATION WAS BEING CHEM, VOL CONT + LIQ POISH SYS 75 OIT 092675 CONDUCTED DUE TO DIFFERENCES IN INDICATION BETWEEN REDUNDANT LEVEL CHANN INSTRUMENTATIDH + CONTROLS 013453 2-WEEK ELS. ACTUAL WATER LEVEL WAS 12.2 FT. C0t1 PARED TO T.S.3.3.1.2A L It1I T OF 1 NO SUBC001PONENT PROVIDED 2.55 FT. ALL OTHER ENGINEERED SAFETY FEATURES WERE JPERABLE.
"A" TANK 11 C 0f1P O N Ell T FAILURE AD GREATER LEVEL TilAN REQUIRED.
CAUSE SUBCODE NOT FROVIDED NO MANUFACTURER SPECIFIED LEVEL INDICATOR CF2-LT4 OUT OF CALIBRATION. BORATED WATER ADDED TO TANK AND LEVEL INDICATOR ADJUSTED AND CALIBRATED. LEVEL CHANNELS WILL BE fl0HI TORED FOR TRENDS INDICATING PROBLEMS.
THREE MILE ISLAND-1 05000289 091875 (AO-75-32). WilIL E DFRFORMING A REACTOR BUILDING PERSONNEL ACCESS ffATCH 0 CNTNMNT ISOLATION SYS + CONT 75 Oli 092675 00R SEAL LEnK TEST 4JP 1303-11.18 SECTION A), OPERATOR CHECKED VALVE LIN VALVES 013492 2-WEEK EUP FOR THE AIR SUPPLY TO THE DOOR SEALS AND FOUND 2 NORitALLY DPEN VALVE NO S U B C OT1P 0 H EN T PROVIDED S (PP-V-47 AND 179) WERE IN CLOSED POSITION. VALVES WERE OPENED, DTHER V PERSONNEL ERROR ALVES VERIFIED, AllD A SATISFACTORY LEAK TEST WAS PERFORf1ED.
CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED PERSONNEL NOT FOLLOWING PROCEDURE
S. PROCEDURE
S UPCRADED TO REQUIRE VERIF ICATION OF VALVE POSITIDH PRIOR TO TESTING. LOCKING DEVICES k"' t BE INST ALLED ON THE VALVES INSIDE TiiE PERSONNEL AND EMFRGENCY ACCESS HAICH.
THREE MILE ISLAND-1 05000289 012075 (ER 75-30D-4) A MONTHLY COMPOSITE 0 WEEKLY GRAB SAMPLES OF SURFACd RIVE SYSTEM CODE NOT APPLICABLE 75 04T 112075 R WATER (REPRESENTING 9/6 TilRU 9/2, COLLECTED ADOUT 1.5 MILES DOUNSTREA C 0t1P 0 tlE N T CODE iDT APPLICAPLE 015697 2-WEEK M FR0f1 THE TMI-1 RIVER DISCllARGE HA: A TOTAL TRITIUf1 ACTIVITY OF 1.2E-6 SUBC0:1PONENT NOT APPLICABLE MICROCI/CC AS REPORTED TO MET-ED ON OCTOBER 21, 1975. TilIS VALUE IS GREA OTHER TER TilAN FOUR TIMES Tile CONTROL STATION VALUE OF 2.5E-7 f11 CROCI /CC.
C Al'SE SU6 CODE NOT PROVIDED ITEll NOT APPLICABLE IT IS EELIEVED THAT THE GRAB SAMPLES WERE TAKEN DURING PERIODS OF EVAPOR ATOR CONDENSATE TANK DISCHARGE AND, ACCORDINGLY, DURING PERIODS OF NIGHE I'3 R-THAN-NORMAL RIVER WATER TRITIUM LEVEL.
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APR 18, 1979 LER OUTPUT Ott EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE'33 F R 0il 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AttD EVEllT DATE FACILITY / SYSTEM /
CottPONENT/COMPCNENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER t10./
REFORT DATE/
EV E tit DESCRIPTI0tt' COMP 0tiENT MANUFACTURER C0tiTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE t1ILE ISL At4D-1 05000289 092475 (t4014-ROUTINE 30-DAY REPORT 75-08). DURING THE SUMMER MONTHS, REACTOR EUI CNTNTINT HEAT R Lf10V SYS + CONT 75 99L 102475 LDING (RB) INTERNAL TEr1PERATURES IN EXCESS OF Tile 110 DEGREE SUSTAlt1ED T OTilER COMPONENTS 013502 30-DAY Ef1PER ATURE ASSUf1ED IN THE FSAR HAVE BEEN EXPERIENCED. TEMPERATURES UP 10 SUECOMPONEllT NOT APPLICABLE 130 DEGREES HAVE BEEtt EXPERIENCED. Ill ADDITION, THE B I U DESTGliED RB I DESIGN / FABRICATION ERROR NDUSTRIAL COOLERS HAVE NOT PERFORMED UP TO TilEIR DESIGN R Al ltiG.
CAUSE SUBCODE NOT PROVIDED CAUSE DESCRIPTION C0 tit.- il FSAR.
NO MANUFACTURER SPECIFIED POSSIBLY DUE TO CHIMilEY EFFECTS CREATED BY GAPS Ill SOME SYSTEM INSULATIO N.
ALSO COMPLICATED BY COOLERS NOT PERFORf!ING AS EXPECTED. INVESTIGATION S ARE CONTIrlUING. At1ALYSIS SHOWS NO ADVERSE EFFECT ON LOCA IN FSAR.
TilREE MILE ISLAND-1 05000289 092775 (NON-ROUTINE 10 DAY REPORT 75-06). FOR 37 MItiUTES, A tt INADVERTENT RELEAS RESIDUAL HEAT RLMOV SYS + C0 tit 75 43T 100775 E OF GASEOUS RADI0 ACTIVE MATERIAL OCCURRED DUE TO THE LIFTING OF RELIEF VALVES 013422 2-WEEK VALVE DH-V-57A THAT RESULTED I ti LEAKAGE OF PRIMARY COOLANT TO THE 231 FO fl0 SUBCOMP0t'HT PROVIDED OT FLEVATI0ti 0F AUX. BLDG. SUBSEQUENT DEGASSING OF COOLANT RESULTED Ill G C OMP0 tie N T FAILURE ASEOUS RELEASE TO ATMOSPHERE VIA AUX. BLDG. VEllTILATION.
CAUSE SUBCODE NOT PROVIDED WALWORTH CO.
LEAKAGE OF CHECK VALVE DH-V-14A (14 INCH, WALWORTH CORP.). DECAY HEAT RE MOVAL "A" SYSTEM WAS SECURED. VALVE WILL BE REPAIRED. tio T ECil. SPECS. OR 10 CFR 20 lit 1ITS WERE EXCEEDED.
THREE MILE ISLAND-1 05000289 09287i (AO-75-34). DURING A ROUTINE INSPECTION OF HYDRAULIC SHOCK SUPPRESSORS (
OTHER ENGNRD SAFETY FEATR SYS 75 01T 100875 SNUBBERS) INSIDE THE SECONDARY SHIELD OF THE REACTOR BUILDItiG, OttE SNUBB HANGERS, SUPPORTS, SHOCK.SUPPRSS 013420 2-WEEK ER LOCATED AT POSITION RC-13 ON Tile PRESSURIZER AUXILI ARY SPRAY LINE WAS NO S U B C 0l1P 0 ti Eti T PROVIDED FOUND TO BE DISC 0t1HLCTED. THE Ut(IT WAS II: MEDIATELY RE!!0VED, REBUILT, TE DEFECTIVE PROCEDURES STED, AND RE-ItiSTALLED AT POSITI0tl RC-13.
CAUSE SUBCODE NOT PROVIDED tio MANUFACTURER SPECIFIED THE SNUBBER liAD BEEN INSTALLED Otl 4/7/75 TO REPLACE ANOTHER INOPERABLE S NUBBER DUE TO LOW FLUID LEVEL AND WAS IMPROPERLY CONiiECT ED. OTHER SHUBBE RS WERE INSPECTE
D. PROCEDURE
S WILL BE UPGRADED AS I4ECESSARY.
THREE MILE ISL AtlD-1 05000289 106475 (ER 75-7D-4) THE MONTilLY COMPOSITE OF WEEKLY GRAB SAMPL ES (10/4-11/1) 0F SYSTEr1 CODE il0T APPLICABLE 75 04X 010276 RIVER SURFACE WATER COLLECTED 0.5 AtID 1.5 f1ILES DOUNSTREAf1 FROM THE DIS Cat 1PO!!ENT CODE NOT APPLICABLE 015899 OTHER CHARE SHOWED A TRITIUM C0tlCEilTRATION OF 3.49 AND 1.93 PrI/CC RESPECTIVEL SUBCOMPONENT NOT APPLICABLE Y.
THESE VALUES ARE 10 AND 4 TIMES 3.T THE CONTROL STATION VALUE OF 0.25 OTHER PCI/CC AND 35 AND 10 flMES G.T.
THE UPSTREAM STATI0tl VALUE-0.01PCI/CC.
CAUSE SUBCODE NOT PROVIDED ITEf1 NOT APPLICABLE IT IS BELIEVED THAT THESE GRAB SAMPLES WERE TAKEN DURING A PERIOD OF HIG N
H E R - Til A N - t10 R f! A L EVAPORATOR Cor:DEt{S AT E T ANK VOLU'1E DISCil ARGE, THEREFORE, HIGHER-THAti-NORMAL TRITIUM LEVEL.
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a APR 18, 1979 LER DUTPUT O tt EV F ri T S AT THREE MILE ISLAND 1 AND 2 PAGE'55 FROM 1969 TO THE PRESEtiT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT /COMPONEt1T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUCCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTIOh/
COMPCNENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRlPTION THREE MILE ISL At4D-1 05000289 102175 (AO-75-33) A PLAtiT OFERATIONS COMMITTEE REVIEW NOTED THAT THE RESULTS OF REACTIVITY C0tiTROL SYSTEMS 75 OIT 103175 THE Col 4 TROL ROD PROGRAM VERIFICATION DID NOT MEET THE SURVEILI.NCE REQU CONTROL RODS 013557 2-WEEK IREMENTS OF T.S.
4.7.2.1.
THE SURVEILLANCE WAS PERFORMED BY MOVING A GRO SUBC0f1P0tiENT tiOT APPLICABLE UP OF RODS RATHER THAN MOVING EACH ROD Iti THE GROUP SEPARATELY. FURTHER PERSONNEL ERROR REVIEW SHOWED NO SAFETY PROBLErl.
CAUSE SUBCODE NOT PROVIDED N0 f1ANUFACTURER SPECIFIED PERSONNEL ERROR / PROCEDURAL INADEQUACIES. SURVEILLAtiCE PROCEDURE WILL BE REVISED TO CLEARLY ST ATE REQUIREME>iTS AND OPERATIONS PERS0i4NEL WII L BE R EINSTRUCTED.
THREE MILE ISLAND-1 05000239 102375 (ER 76-04) ALSO APPLIES TO TMI-2. SEMI-ANNUAL RIVER BOTT0il SEDIMENT SAMP SYSTEM "0DE NOT APPLICABLE 75 04X 011676 LES SHOWED MATERIAL WHICH EXCEEDED FOUR TIMES T H E C 014 T R O L STATION VALVES C0i1PON' N T CODE NOT APPLICABLE 015604 OTHER FOR SAf1PLES COLLECTED ON OCT. 23, 1975 AND REPORTEC TO MET-ED ON DEC. 1 S U B C 01 O tiEti T NOT iPPLICABLE 9,
1975. THE ISOT0Ft IN QUESTION IS CESIUM-137 CALCULATED TO BL LESS TH OTHER AN 0.083 MILLTRFM/YR. TOTAL BODY DOSE - MAX. HYPOTHETICAL MAN.
CAUSE SJBCODE NOT PROVIDED IT Ef1 t40T APPLICABLE CONCENTRATION STATISTICALLY NORMAL FOR RIVER BED - REAS0tl FOR REPORT WAS THAT CONTROL STATION VALVE WAS ABriORMALLY LOW IN COMPARISON THREE MILE ISLAND-1 05000239 111275 (AO-75-40). AN ItiSPECTICH SHOWED THE THREE UP TO VOLTAGE RELAYS ON THE 1 EMERG GENERATOR SYS + CONTROLS 75 Oli 112175 A D/G TO HAVE STUCK CONTACTS. THIS COULD HAVE CAUSED PREMATURE CLOSURE G RELAYS 013683 2-WEEK F THE D/G BREAKER IN THE EVENT THE D/G UAS REQUIRED TO AUTOMATICALLY STA NO S LT C OMP O N E t1T PROVIDED RT. D/G WOULD PROBABLY HAVE OPERATED IF NEEDED.IN ADDITION, 1D D/G WAS A C OMP O N E ti T FAILURE VAILABLE.
CAUSE SUBCODE NOT PROVIDED WESTINGHOUSE ELECTRIC CORP.
PITTING OF VOLTAGE RELAY CONTACT. STUCK RELAYS WERE MANUALLY RESET AND I NSPECTI0t45 WILL BE IliCREASED. DESIGil CHAtlGE WILL BE MADE. WESTItiGHOUSE V OLTAGE RELAY CV-7 STYLE NO. 1875524A.
THREE MILE ISLAND-1 05000289 111275 (AO-75-39). DURING FULL POWER OPERATION. CONTROL ROD (C/R) 4 0F GROUP 7 RFACTIVITY CONTROL SYSTEMS 75 GIT 112175 DROPPED INTO CORE FRott 15% WITHCPAUN POSITION DUE TO STATOR UINDING FAIL CONTROL ROD DRIVE MECHANISMS 013684 2-WEEK URE. THIS CAUSED RUNBACK AtiD INSERTICH OF GROUPS 6 AND 7 RODS. C/R 5 0F S U B C OMP 0 ti Eti T NOT APPLICABLE GROUP 7 BECAME flISALIGNED BY MORE THAN ALLOMABLE 9 ItiCHES AND ALSO DECL A C OMP 0 tl E N T FAILURE RED INOFERABLE. TWO INOPERABLE RODS VIOLATES TS 3.5.2.2.A.
CAUSE SUBCODE NOT PROVIDED DIAMOND POWER SPECIALTY CORP.
N FAILED STATOR WINDING OF C/R 4.
SCRAM CAPABILITY OF ALL RODS WAS NOT It1P AIRED. STATOR WItiDIllG REPLACED AND OTHERS TESTED. MAINTENAtiCE PROCEDURES UPGRADED.
N CD s
APR 18, 1979 LER QUTPUT ON EVEtiTS AT THREE MILE ISLAND 1 AND 2 PAGE'36 FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVE!1T DATE FACILITT/ SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER tio./
REPORT DATE/
EVENT DLSCRIPTION/
C0f;PONEtiT MANUF AC TURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 111375 (NON-ROUTINE 10-DAY REPORT 7'-07).
FOR A PERIOD OF 2 liOURS, 45 f1 INS. A ti OTHER COOLANT SUBSYS + CONTROL 75 43T 112175 IN ADV ERT AtiT RELEASE OF RADI0 ACTIVE flATERIAL OCCURRED UHILE DRAlt1ING THE OTHER C0t1PONENTS 013682 2-WEEK RCS FROM THE PRESSURIZER SURGE LItiE TO THE C RC BLEED TANK. NO COSE IN SUECOMPONEllT NOT APPLICABLE EXCESS OF 10 CFR 20 LIMITS WAS EXPERIENCED AND t4O T.S.
LI!!ITS WERE EXCEE DEFECTIVE PROCEDURES DED.
CAUSE SUBCODE NOT PROVIDED HO MAtiUFACTURER SPECIFIED LACK OF PROCEDURAL GUIDANCE. RELEASE WAS TERf1IHATED At4D PROCEDURE CHANGE S WILL BE f1ADE.
THREE T1IL E ISLAND-1 05000289 111375 (ER 75-9) DURING THE COOLDOWN OF THE REACTOR COOLANT SYSTEM, THE DECAY H RESIDUAL HEAT REf10V SYS + CONT 75 04T I12075 EAT R Ef10 V A L SYSTEM UAS PLACED INTO OPERATIuti. THE ADDITONAL HEAT LOAD IM C 0f1P C t1 E N T CODE NOT /PPLICABLE 015698 2-WEEK Pu:ED ON THE RIVER WATER SYSTEM CAUSED THE EFFLUENT TEMPERATURE TO RISE SUBCOMPONENT NOT APPLICABLE FROM 52 F AT 0650 TO A IIAX OF 57 F AT APPROX 0720. CHAliGE OVER ONE HR WA P E R S O N!1E L ERROR S3 F.
ETS lit 1IT 2 F/HR.
CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE THE OPERATOR DID NOT CLOSELY MotlITOR THE TEMPERATURE CHAT 1GE WHEtt PLACING THE PLANT IN THE DECAY HEAT MODE OF OPERATIOti.
THREE MILE ISLAND-1 05000289 11t475 (AO-75-41). DURING SHUTDOWN, IT WAS DISCOVERED THAT lHE CENTER CRDf1 UAS REACTIVITY C 0 t4 T R O L SYSTEMS 75 01T 112475 VENTED TO THE BUILDING AND PERMITTING RADI0 ACTIVE GAS TO EVOLVE FR0f1 THE CONTROL ROD DRIVE MECHANISMS 013735 2-WEEK VENTED RC SYSTEM TO THE REACTOR BUILDING. VENT WAS IfriEDIATELY CLOSED A SUBCOMPONENT NOT APPLICABLE I4D GAS SAfiPLES COLLECTED. HD EXPOSURE PROBLEf1S RESULTED. SIf1ILAR OCCURRE PERSONNEL ERROR NCE REPORTED IN A0-75-38.
CAUSE SUBCODE tiOT PROVIDED NO mat 40FACTURER SPECIFIED PERSONNEL ERROR. BY NOT FOLLOWING PROCEDURES. OPERATI0 tis PERS0liNEL UILL BE COUtiSELED AND CAUTIONED TO STRICTLY ADHERE TO PROCEDURES.
THREE MILE ISLAND-1 05000289 111975
( fl0 N-R O U T I N E 10-DAY REPORT 75-08). TWO UNPLANNED RELEASES OF RADIOACTIVE OTHER COOLANT SUBSYS + CONTROL 75 43T 112675 IIATERIAL OCCURRED F'D A TOTAL PERIOD OF ABOUT 17 HRS. AND 45 f1 INS. FIRS VALVES 013681 2-WEEK T ONE DUE TO OPENIN ALVES f15-V23 A/B AND MS-V25 A/E WITH SYSTEM CONDIT NO SUBC0f1PONENT PROVIDED 10 tis SUCH THAT EVENioAL RELEASE WAS POSSIBLE. SECOND DUE TO STARTING R/C DEFECTIVE PROCEDURES PUMP AS PART OF PLANT HEATUP EVOLUTION.
CAUSE SUBCODE 110T PROVIDED ti0 MAtiUFACTURER SPECIFIED INADEQUATE PROCEDURES. RELEASES WERE TERf1INATE
D. PROCEDURE
S BEING UPCRAD Id ED. NO DOSE IN EXCESS OF IC CFR 20 RESULTED. Il0 LIMITS OF TECH SPECS. WE 4 :~
RE EXCEEDED.
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J APR 18, 1979 LER OUTPUT ON EVENTS AT THREE T1ILE ISLAND 1 AND 2 PAGE 37 FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AtID EVEllT DATE FACILITY / SYSTEM /
C 0f1P ON E N T / COMP 0tlE N ;
ODE /
DOCKET tio./ EVENT DATE/
CAUSE/CAUSE SUDCo[H/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MAtluFACTURER CONTROL NO. REPORT TYPE
CAUSE DESCRIPTI0tl THREE t1IL E ISLAND-1 05000289 112575
( N 0 ti-R O U T IllE 10-DAY REPORT 75-09). FOR A PERIOD OF 41 MItiUTES Ali Itt A DV ER COOLANT RECIRE SYS + CollT RO L S 75 43T 120575 TANT RELEASE OF RADI0 ACTIVE T1ATERIAL OCCURRED DUE TO THE OVERFLOU OF AE0 O!HER C OMP 0 H EliT S 013766 2-WEEK UT 800 GALLONS OF REACTOR COOLANT FROM THE "B" REACTOR C00L AtlT BLEED TAtt SUCCOMPONEtiT NOT APPLICABLE K INTO THE AUX. BLDG. SUMP. HD 10 CFR 20 OR T E Cil. SPEC. LIf1ITS WERE EXCE PERSONNEL ERROR EDED.
CAUSE SUBCODE NOT PROVIDED NO t1ANUFACTURER SPEC!FIED OPERATOR INCORRECTLY CHOSE THE "B" BLFED TANK, WilICil UAS FULL AT THE TIM E,
TO LETDOWN PRIMARY SYSTEM DURING BLEED AND FEED OPERATIONS.LETDOWri TR ANSFERRED TO
'C' BLEED TANK AliD OPERATOR CAUTIONED.
THREE MILE ISLAtlD-1 05000289 120675
( NONROU T I rlE 10-DAY REPORT 75-10). AN INADVERTANT RELEASE OF PADI0 ACTIVE C00L Atil RECIRC SYS + CONTROLS 75 43T 121675 MATERIAL OCCURRED FOR 2 Il0URS WitILE WATER WAS BEING ADDED TO THE RC SYST OTHER C OMF 0t4 E N T S 013793 2-WEEK Ef1 FROM BLEED TANK A.
THE WATER ADDITION RESULTED IN A FRESSURE INCREASE SUBCOMPONENT NOT APPLICABLE CAUSIllG A RELEASE EITHER THROUGH T1AKEUP T At1K T1ANWAY GASKET OR FROM VALV C0f1PONENT FAILURE E TIU-V13.
CAUSE SUBLODE tt0T PROVIDED NO MAffUFACTURER SPECIFIED NOT KNOWtl AT THIS tit 1E. SAMPLING 15 CONTINUING IN AN ATTEf1PT TO IDENTIFY ANY LEAKS. No to CFR 20 OR TECHNICAL SPECIFICATION LIf1ITS WERE EXCEEDED THREE MILE ISLAND-1 05000289 121075 (AO-75-42). DURING SURVEILL ANCE T EST. THE OUTSIDE C0tiTAINMENT ISOLATION C N T riMN T ISOLATION SYS + Cotti 75 OIT 121975 VALVE FOR Tite S/G sat 1PLE LINE, CA-V5B, FAILED TO CLOSE. IT WAS FOUND THA VALVE OPERATORS 013792 2-WEEK T THE MAliUAL OPERATOR WAS t10T ENGAGED IN THE NEUTRAL POSITION AND THEREF t10 SUCCOMPONENT PROVIDED ORE IIELD Tile VALVE OPEN. THE INSIDE ISOLATION VALVE, CA-V45, WAS TESTED PERSONNEL ERROR AND WAS OPERABLE.
CAUSE SUBCPDE tiOT PROVIDED NO MANUFACTURER SPECIFIED OPERATOR liAD INADVERTENTLY LEFT Tile VALVE MANUAL OPERATOR IN OPEli POSITI ON. VALVE WAS UNBOUND AND STROKED FREELY. ALL OPERATORS WILL DE REINSTRU CTED AS TO PROPER OPERATI0li 0F TalIS VALVE TYPE.
THREE MILE ISLAND-1 05000289 121875 (AO-75-43). DURING SURVEILLANCE TESTING OF REACTOR SUILDING 30 PSIG CHAN REACTOR TRIP SYSTEMS 75 OIT 122675 tie L S, ONE OF Tile SIX PRESSURE SWITCilES UAS FOUND TO TRIP AT 30.5 PSIG C0 INSTRUMENTATION + CCNTROLS 013821 2-WEEK T1 PARED TO T E Cli. SPEC. 3.5.3.1 L If1I T OF EQUAL OR LESS THAN 30 PSIG. Tile O NO SUBCOMPONENT PROVIDED THER FIVE SWITCHES WEP,E WITHIN LIMITS. SUI TCli IIADil' T BEE" C ALIBR ATED Sill C OMP O N E ti T FAILURE CE JANUARY 15, 1974.
CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED g
SETPOIllT DRIFT. SWITCH WAS RECALIBRATED AND RETESTED. SQUARE D CO. PRESS URE SWITCil. TYPE 9013-AMGS, FORM "R",
0-100 PSIG rat 1GE, PLUS OR MINUS 2%
ACCURACY.
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APR 18, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE'38 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT /CCMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT NAMUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000239 010276 (LER-76-1/1T). DURING 25 MINUTES, AN INADVERTANT RELEASE OF RADI0 ACTIVE LIQ RADIDACT WSTF MANAGMNT SYS 76 03T 011276 MATERIAL OCCURRED DUE TO LEAKAGE THROUGH VALVE WDL-V125 WHILE RECRICULAT VALVE OPEft!ORf 013970 2-WEEK ING THE WASTE EVAPORATOR CONDENSATE STORAGE TANK "B" CONCURRENT WITH ROU NO SUBCOMPONENT PROVIDED TINE FLUSHING OF RADI0 ACTIVE LIQUID DISCHARGE MONITOR. No T.S.
OR 10 CFR PERSONNEL ERROR 20 LIMITS WERE EXCEEDED.
CAUSE SUBCODE NOT PROVIDED NO MANUFACTURLR SPECIFIED AIR LOADING ON VALVE OPERATOR WAS NOT PROPERLY BLED OFF BY AUX. OPERATOR OPERATIONS WERE TERMINATED TO STOP THE RELEASE. PRGCEDURE CHANGES HAVE BEEN INCORPORATED.
THREE MILE ISLAND-1 05000289 010276 (ER 76-1) RELEASE OF RADI0 ACTIVE MATERIAL OCCURRED BECAUSE OF VALVE LEAK LIQ RADI0ACT WSTE MANAGMNT SYS 76 04T 011276 AGE WHILE RECIRCULATING WASTE EVAPORATOR CONDENSATE STORAGE TANK AND CON VALVES 016583 2-WEEK CURRENTLY FLUSHING RADI0 ACTIVE LIQUID DISCHARGE MONITOR. LEAK AlLOUED RA NO SUBCOMPONENT PROVIDED DI0 ACTIVE LIQUID TO FLOW FROM RECIRCULATING PATH TO NORMAL RELEASE PATH.
DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED ITLM NOT APPLICABLE AIR LOADING OH VALVE OPERATOR MAY NOT HAVE BEEN PROPERLY CLED OFF BY AUX ILIARY OPERATOR, PERMITTING THE VALVE 10 BE CRACKED OFF ITS SEAT. PROCED URE MODIFIED.
THREE MILE ISLAML-1 05000289 010676 (LER-76-2/10). WHILE STARTING NUCLEAR SERVICES RIVER PUMP "A"
(NR-PIA),
COOL SYS FOR REAC AUX + CONT 76 OIT 011676 PUMP DISCHARGE VALVE (NR-V1A) FAILED TO OPEN WHEN THE PUMP WAS STARTED.
VALV25 013950 2-WEEK AT THE TIME, NR-P1A WAS THE DESIGNATED ENGIdEERED SAFEGUARDS (ES) HUCLEA NO SUBCOMPONENT PROVIDED R SERVICES COOLING RIVER PUMP. ALTERNATE PUMPS AND SYSTEf15 UERE OPERACLE COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED PRATT, HENRY CO.
VALVE BINDING OF THE 16 INCH BUTTERFLY 100 PSI VALVE MADE BY HENRY PRATT CO. VALVE OPERATCR ALSO FOUND TO BE DAMAGED. VALVE AND VALVE OPERATOR A RE BEING REPAIRED.
THREE MILE ISLAND-1 05000289 011076 (LER-76-03/10), FOR NEARLY 19 HOURS, RM-2A (COOLANT LEAK DETECTION SYSTE REAC COOL PRES BOUN LEAK DETEC 76 OIT 012076 M SENSITIVE TO RADI0 ACTIVITY) WAS INOPERABLE (DUE TO I f.P R O P E R VALVE LINE COMPONENT CODE NOT APPLICABLE 013949 2-WEEK
-UP), YET NO SAMPLES OF THE R.B.
ATMOSPHERE WERE TAKEN 4ND ANALYZED EACH SUBCOMPONENT NOT APPLICABLE 8 HOURS AS REQUIRED BY SPECIFICATION 3.1. 6. 7.
DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED PJ INADEQUATE PROCEDURES. AFTER DISCOVERY OF If1 PROPER VALVE LINE-UP, RM-2A WAS IMMEDIATELY REIURNED TO SERVIC
E. PROCEDURE
S WERE UPGRADED AND PERSON HEL REINSTRUCTED.
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e APR 18, 1977 LER OUTPUT ON EVEtiT S A T TilREE MILE ISLAND 1 AND 2 PAGE'39 F R 0:1 1969 TO THE PRESET 4T GUTPUT SORIED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C 0f;P ON E N T / C OMPO N EN T SUBCODE/
DOCKET No./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
E V E tt i DESCRIPTION /
COMPONENT MANUFACTURLR CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 012876 (LER 76-11/3L) UPDATE TO REPORT DATED 2/27/76). IT WAS FOUND THAT THE S/G MAIN CONDENSER SYS + CONT 76 03L 050776 FULL RANGE LEVEL TRANSMITTER HAS NOT BEEN S EI Sf11 C A L L Y QUALIFIED. IN ADD INSTRUMENTATION 4 CONTROLS 014160 30-DAY ITIOH, Su;1E EQUIPMENT ASSOCIATED WITH S/G LEVEL (START-UP AND GPERATING NO SUBCOMPONEtlT PROVIDED RANGE) MAY NOT BE SEISMICALLY ADEQUATE.
O!HER CAUSE SUBCODE NOT PROVIDED BAILEY METER COMPANY NO CHANGE PLANNED FOR FULL RANCE LEVEL INSTRUMENT, SINCE START-UP AND OP ERATING RAliGE INDICATORS ARE ADEQUATE FOR SAFETY. DESIGN CHANGES WILL DE MADE FOR THE ASSOCIATED EQUIPMENT TO THE S T AR T-UP/0PER ATING IttDIC A T ORS.
THREE MILE ISLAND-1 05000289 020376 (LER 76-5/1T). DURING TESTING, AN AUTO-ACTUATION RELAY (62X3/RC3B) Its RE OTHER ENGNRD SAFETY FEATR SYS 76 01T 021376 ACTOR COOLANT C H A tin E L 3B FAILED TO GO TO ITS ES POSITION UPON RECEIPT OF RELAYS 014065 2-WEEK AN ES TRIP SIGNAL. THIS RELAY IS PART OF THE 2 OUT OF 3 AUTO-LOGIC FOR NO SUBCOMPONElli PROVIDED ACTUATION B, BLOCK 4 COMP 0tiEt4TS. REDUNDANT ACTUATION A CHAhNELS WERE VER C O MP 0 t4 E N T FAILURE IFIED OPERABLE.
CAUSE SUBCODE NOT PROVIDED CLARK CONTROLLER SLIGHT MECHANICAL BIllDIllG 0: ARMATURE AND CONTACT LItiKAGE OF RELAY. FAUL TY RELAY (CLARK CONTROLLER LO.,
PM RELAY, CAT. t10. SU12-11, 10 AfiP, 600 VAC) WAS REPLACED BY A SPARE.
THREE MILE ISL AliD-1 05000289 020476 (LER 76-6/1T). AFTER Att INSPECTION, A TECHNICIAN INADVERTENTLY LEFT A PA AIRBORilE RADIDACT MONITOR SYS 76 01T 021376 RTICULATE MONITOR COVER PLATE AJAR, ALLOWING OUTSIDE AIR RATHER THAN PEA IllSTRUMENTATION + CONTROLS 014066 2-WEEK CTOR BUILDIllG AIR, TO BE DR AW THROUGH THE f10NITOR. 22 HOURS LATER A SHI NO SUBCOMP0t;ENT PROVIDED FT FOREMAN DISCOVERED THE ERR 0k. TWO ADDITIOllAL LEAK DETECTION SYSTEMS U DEFECTIVE PROCEDURES ERE OPERABLE.
CAUSE SUBCODE NOT PROVIDED NO liANUF ACTURER SPECIFIED INADEQUATE PROCEDURES PERTAINING TC REMOVAL AND REPLACEMENT OF SUCH COVE R PLATE
S. PROCEDURE
CHANGES WILL BE IMPLEMENTED. SIMILAR EVEtiT REPOP.TED IN LER 76-3/10.
THREE MILE ISLAND-1 05000289 021176 (LER 76-7/IT). DURING ROUTINE SURVEILLANCE 2F SNUBBERS I tt THE AUXILIARY OTHER ENGNRD SAFETY FEATR SYS 76 OIT 022176 BUILDING, ONE St4UBBER LOCATED AT POSITION DHh '93 ON THE A DECAY HEAT P HANGERS, SUPPORTS, SHOCK,SUPPRSS 014200 2-WEEK UMP SUCTION LINE WAS FOUND WITH AN EilPTY FLUID REdEVOIR. UNIT REMOVED AN tt 0 SUBCOMPONENT FROVIDED D REPLACED WITH A REBUILT UNIT. OTHER SNUEBERS WERE OPERABLE AND PROVIDE COMPONENT FAILURE D ADEQUATE PROTECTION.
CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED NOT D E T E RMI t1E D. SEALS LOOKED ACCEPTAF,LE. FAILED UNIT WAS REBUILT TESTED, AND RETURNED TO SERVICE. (BASIC ENGINEERS; CYLINDER TYPE: TOMPKINS-JOHN N
SON; SIZE 1 INCH; STROKE: 5 INCUES).
u
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 40 FRCt1 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
CorPONENT/CCf1PONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUECODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTIDH/
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTICH THREE f1ILE ISLAND-1 05000289 021976 (ER 76-8) APPLIES It1I-2 ALSO. FLOW RECORDER (FR-123) WOULD NOT HAVE CLCS GAS RADI0ACT WSTE MANAGMNT SYS 76 04T 022676 ED DISCHARGE VALVE WDG-V47 F R 0t1 THE WASTE GAS DECAY T At:K ON HICH FLOW..
INSTRUMEtlTATION + CONTROLS 014677 2-WEEK PCN SEEING FAILURE; OPERATOR MANUALLY TERT 1INATED RELEASE. HIGHEST REACHE NO SUBCCMPONENT PROVIDED D 3.5E+03 CPM.
OTHER CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE PROCEDURE / PERSONNEL IN THAT THE TEST SUITCH FOR THE RECORDER WAS IN Tnd TEST POSITION DURING THE RELEASE At1D WOULD NOT HAVE RESPONDED TO ITS tiCR MAL INPUT SIGNAL THREE MILF ISLAND-1 05000289 022176 (LER 76-9/1T). WHILE PERFORMING "ES SYSTEM AND POWER TRANSFER TEST" THE OTHER ENGNRD SAFETY FEATR SYS 76 OIT 030676 "A"
MAKEUP AND PURIFICATION PUMP UAS STARTED, HOWEVER, DUE TO PE0CEDURE PUMPS 014220 2-WEEK AND PERSONNEL ERROR, THE PRETEST VALVE LINEUP UAS NOT CORRECT FOR THE "A NO SUBCCMPONENT PROVIDED
" PUMP, RESULTIt4G IN PUMP FAILURE. ALSO S0t1E COOLANT LEAKED OUT OF THE P DEFECTIVE PROCEDURES UMP SEAL. SIMILAR EVENTS ARE AD 74-9 A tlc 74-10.
CAUSE SUBCODE hdI PROVIDED NO MANUFACTURER SPECIFIED INADEQUATE PROCEDURES AND PERSONNEL ERRO
R. PROCEDURE
S UPGRADED AND PERSO N t4 E L REINSTRUCTED. THE "B"
AND "C" PUMPS WERE OPERABLE TO PROTECT THE SY STEM.
THREE MILE ISLAND-1 05000289 022176 (LER 76-10/3L). WHILE PERFORMING THE EMER0ENCY SEQUENCE Alm OUER TRANSF LMERG GENERATOR SYS + CONTROLS 76 03L 031876 ER SURVEILLANCE TEST, THE "1B" DIESEL GENERATOR (D/G) FAILED TO CLOSE WH GENERATORS 014293 30-DAY EN THE "1D" 4160V BUS WAS DEENERGIZED. S/G UAS OPERABLE SY INCREASING TH NO SUSC0f1PCNENT PROVIDED E S/G SPEED. ALSO "1A" D/G WAS AVAILABLE FOR EMERGENCY POWER.
DEFECTIVE PROCEDURES CAUSE SUBCODE NOT PROVIDED N0 f1ANUFACTURER SPECIFIED PROCEDURE INADEQUACIES IN THAT IT DID NOT REQUIRE PERIODIC CHECKS OF D/G FRt0UENCY.
"1A" S/G VERIFIED OPERABLE AND GOVERNOR OF THE "B" DIESEL AD JUSTE
D. PROCEDURE
S WILL BE UPGRADED.
THREE MILE ISLAND-1 05000239 030476 (LER 76-12/1T). DURINC REFUELING, DAMAGE TO THE REACTOR VESSEL SURVEILLA REACTOR V_
+ APPURTENANCES 76 OIT 031876 NCE HOLDER TUBES WAS OBSERVED. THEREFORE, DURIttG CYCLE 2, THE PL Atti UILL OTHER C O Nr'O N E N T S 014314 2-WEEK BE OPERATED WITH THE SURVEILLANCE SPECIllEN CAPSULES AND HOLDER TUBES RE S U B C0fiP 0 H E N T NOT APPLICABLE MOVED. A NEW DESIGti WILL BE INSTALLED FOR CYCLE 3.
DESIGN / FABRICATION ERROR CAUSE SUCCODE NOT PROVIDED NO MANUFACTURER SPECIFIED FLOW INDUCED RELATIVE MOTIDH BETWEEN THE SURVEILLANCE CAPSULE TRAIN AND MtF HOLDER TUBE. A T.S.
CHANGE REQUEST WILL BE FORWARDED TO THE NRC TO P Id EkMIT CYCLE 2 OPERATION WITHOUT THE SPECIMENS.
un
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4 APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE'41 FROM 1969 TO THE PRESElli OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
~
C OMP 0 tl E N T / C OMP O N EN T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER tio e REPORT DATE/
EVENT DESCRIPTION /
COMPONENT mat 4UFACTURER CONTkUL "J.
REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000239 031376 (LER 76-13/3L, REPORT IS FOR INFORMATION ONLY). WHILE REACTOR WAS IN A S C N T NN!i T AIR PURI + CLEA.UP SYS 76 03L 041276 HUIDOWN AttD DEFUELED CottDITI0tl, CONTROL ROOM GPERATOR NOTED THAT THE SOD VALVES 016832 30-DAY IUM HYDROXIDE TANK LEVEL WAS LOW. LOW LEVEL RESULTED FROM A GRACUAL LOSS NO SUBCOMPONENT PROVIDED OF 1250 GALLONS OF FLUID FROM THE TANK DUE TO VALVE LEAKAGE OVER AN 8 D PERSONNEL ERROR AY PERIOD.
CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED P ER SON!iEL, IN THAT CONTROL ROOM OPERATORS DID t10T CHECK LEVEL ONCE PER S HIFT. OPERATORS WERE REINSTRUCTED AND'.ROCEDURES WERE UPGRADED.
THREE MILE ISLAND-1 05000289 042776 (LER 76-14/3L). DURING REFUELING. THE VALVE STEM FOR DECAY HEAT REMOVAL RESIDUAL HEAT REMOV SYS + CONT 76 03L 052776 SYSTEM VALVE DH-VI WAS REPLACED WITH A t1EW ONE RELEASED FOR ItiST AL L A T ION VALVES 014718 30-DAY Ot!LY (DUE TO LACK OF COMPLETE DOCUMENTATION). HOWEVER, THE VALVE WAS PL NO SUBCOMPONEt1T PROVIDED ACED IN OPERATION BEFORE THE DOCUMENTATION QUESTION WAS RESOLVED.
PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED PERSONNEL ERROR. PERSONNEL WERE REINSTRUCTED. AN EVALUATION OF THE VALVE STEM WAS MADE AND IT WAS DETERMINED TO BE SATISFACTORY. SIMILAR LER REP ORTED IN 75-18.
THREE MILE ISLAND-1 05000289 051076 (LER 76-19/3L). DURING A COMBINED LOCAL LEAK RATE TEST, THE AS-FOUND, ME CNTNMNT ISOLATION SYS + C0 tit 76 03L 060976 ASURED TOTAL LEAKAGE FOR THE VALVES At4D PENETRATIONS REQUIRED TO BE LEAK VALVES 016830 30-DAY TESTED WAS GREATER THAN ACCEPTANCE CRITERIA. SIMILAR OCCURRENCES REPORT NO SUBCOMPONEllT PROVIDED ED I;! LER 75-17 AND LER 75-29.
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED OPERATIONAL WEAR FOP SOME VALVES, IMPROPER DESIGN OF 1 VALVE, AND IMPROP ER WELDING OF SEAT R I t4 GS IN 2 VALVES. VALVES WERE REPAIRED. LEAK TEST TH EN PERFORMED SUCCESSFULLY.
THREE MILE ISLAND-t 05000289 051076 (LER 76-16/JL). DURING A TEST, RB I AND C ANALOG CHANNELS, AN AUTO ACTUA CNTHMNT ISOLATION SYS + CONT 76 03L 060976 TION RELAY, 6322C/RB2B, IN REACTOR BUILDING PRESSURE CUANNEL 2B FAILED T RELAYS 016831 30-DAY 0 GO TO ITS SAFEGUARD POSITION WHEN ITS COIL WAS DE-ENERGIZED BY AN ESAS NO SUBCOMPONENT PROVIDED TEST TRIP SIGNAL. CHANNELS RB2A AND E WERE VERIFIED OPERABLE. SIMILAR E COMPONENT FAILURE VENT REPORTED Iti LER 76-5/1T.
CAUSE SUBCODE NOT PROVIDED GTE SYLVANIA INC.
rs)
MECHANICAL BINDING OF ARMATURE AND C0tiTACT LINKAGE, DEFECTIVE RELAY REPL g 2.
ACED BY SPARE AND TESTED PROPERLY. (TYPE PM RELAY, CAT. It 0. 5014-13, MAD E BY CLARK /GTE SYLVANIA).
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAttD 1 AND 2 PAGE 42 FROM 1969 TO THE PRESET 1T OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY /SYSTE!1/
C 0fiP u t1 E N T / C OMP O N E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER HO./
REPORT DATE/
EVENT DESCRIPTI0t1/
COMPONENT MAtiUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTI0t1 THREE MIlC ISLAND-1 05n00289 051276 (LER 76-18/1T). DURIt{G REFUELIllG, IT WAS DISCOVERED THAT THE DELAY TIME COOLANT RECIRC SYS + CONTROLS 76 OIT 052676 0F THE REACTOR C00LAtlT PUMP MONITOR UPON LOSS OF POUFR Of4 REACICR C00LAN It;ST RUMEN T A TI0tl + C 0 tlI R O L S 014912 2-WEEK T PUMP BREAKER TRIP WAS ABOUT 525 MSEC, CGMPARED TO FSAR VALUE OF 240 MS tio SUBCOMPONENT PROVIDED EC. AN ANALYSIS SHOWED NO SAFETY PROBLEM. THE FSAR WILL BE UPDATE 3.
DEFECTIVE PROCEDURES CAUSE SUBCODE tiOT PROVIDED t40 MANUFACTURER SPECIFIED BREAKDOWN IN ADMINISTRATIVE CONTROLS WHICH ALLOWED THE DISCREPANCY TO C0 UN tt 0 T I C E D. THE EXACT SEQUEllCE OF EVENTS L E A DIt4G TO THE SITUATI0tl IS STI LL UNDER INVESTIGATION.
THREE MILE ISLAND-1 05000289 052076 (LER 76-20/3L). DURING A TEST, CONTAINMENT ISOLATION VALVE WDG-V3 FAILED CNTNMNT ISOLATION SYS + C0tlT 76 03L 061776 TO CLOSE Ott AN El{GIttEERED SAFEGUARDS ACTUATION SYSTEf1 TEST SIGilAL. THE VALVE OPERATORS 016829 30-DAY R E DU tlD A N T VALVE, UDG-V4 WAS VERIFIED OPERABLE.
NO SUBCOMPONENT PROVIDED C OMP O N Ell T FAILURE CAUSE SUBCODE NOT PROVIDED LIMITORQUE CORP.
MISOPERATION OF THE VALVE OPERATOR'S TORQUE SWITCH AtiD/OR TIGHTNESS OF T HE VALVE STEM PACKING. REPAIRS WERE MADE AND VALVE OPERATED PROPERLY. (V ALVE OPERATOR BY LIMITORQUE, TYPE SMB-000).
THREE MIL E 'ISL AND-1 05000289 052176 (LER 76-21/3L). WHILE PERFORMING SURVEILLANCE PROCEDURE 1303-5.1, CONTAI CHINMNT ISOLATI0tl SYS + C 0 tlT 76 03L 061876 NM EtiT ISOL ATI0t1 VALVE MU-V2B FAILED TO CLOSE Ott All tuTO LOGIC ESAS TEST VALVES 014988 30-DAY SIGNAL. THE REDUNDAtti VALVE (MU-V3) FOR THE "B" LETDOWN COOLER OUTLET LI t10 S U B C OMP 0t4 EN T PROVIDED NE WAS IMMEDIATELY VERIFIED OPERABLE. SIMILAR OCCURRENCES: 74-28, 75-30, COMPONENT FAILURE AND 76-20/3L.
CAUSE SUBCODE NOT PROVIDED ROCKWELL MANUFACTURING CD.
MECHANICAL DINDIt1G OF THE VALVES PACKING At1D/OR STEM. VALVE WAS CYCLED S EVERAL T IMES At1D GPER ATED FREELY. (ROCKUELL 2 1/2 IN.-1500 LB. GLOBE STO P VALVE, 316 STAINLESS, 2500 PEIG, 300 DEG.).
THREE MILE ISLAND-1 05000289 052676 (LER 76-22/3L). DURIttG A CONTROLLED RELEASE OF RADICACTIVE LIQUID FROM "
PRCSS + EFF RADIOL MONITOR SYS 76 03L 062576 B" WASTE EVAPORATOR CONDEt45 ATE STORAGE TANK. A HIGH ALARM UAS RECEIVED 0 RELAYS 015081 30-DAY THE LIQUID EFFLUENT RADIATI0tl MONITOR, Ril-L 6. HOWEVER THE ALARM FAILED NO SUBCOMPONEtiT PROVIDED TO CLOSE THE LIQUID RELEASE VALVE, UDL-V-257. DISCHARGE WAS MANUALLY TER COMPONENT FAILURE MINATED.
CAUSE SUBCODE NOT PROVIDED HO MANUFACTURER SPECIFIED RELEASE CONSISTED OF 2220 GALLONS CONTAINING 2.39 E(-6), 2.13 EC-K) ANxd Id FAILED RELAY IN INTERLOCK CIRCUIT BETUEEN THE EFFLUEt1T MONITOR AttD EFFLU 4:~
EllT DISCHARGE VALVE. RELAY ( 3-POL E D0'Jul E THROW 10 AMP 115 VOLT AC BY DE LTRAL C0tiTROLS CORP.) WAS REPLACED.
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APR 18, 1979 LER OUTPUT ON EVEtiT S AT TilREE MILE ISLAND 1 AND 2 PAGE 43 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AtiD EVEllT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSL/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
C O MP 011E N T MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTI0t1 THREE MILE ISLAND-1 05000289 060476 (LER 76-24/1T). IT WAS DISCOVERED THAT THE FUEL DEhSIFICATION PENALTY WA SYSTEM CODE NOT APPLICABLE 76 OIT 061876 S NOT PROPERLY INCORPORATED Ill T O THE T.S.
PREPARED FOR CYCLE 2.
UHICH AF COMP 0tlEtiT CODE tiOT APFLICABLE 014928 2-WEEK FECTED THE DNS BASED PRESSURE-TEMPERAIURE LIf1IT CURVES. HOMEVER, R EC Erl T SUBCOMPONENT NOT APPLICABLE E L I f1I N A T I 0ti 0F I N T E Ril A L VENT VALVE LYPASS FLOW pet 4AL TY T10RE TliAti COMPENS EX T E R ri A L CAUSE ATES FOR E ERROR.
CAUSE SUBCODE NOT PROVIDED tiO IIANUFACTURER SPECIFIED A DRAFT OF T.S.
CHANGE REQUEST NO. 36 UAS 00 Rf11 T T FD TO Tile i;RC T O I rt C L U D E AFFECTED CURVES TO REFLECT FUEL DENSIFICATION AND INTERNAL VENT VALVE BYPASS FLOW PENALTY CHAf4GES.
IllREE MIL E ISLAND-1 05000289 060476 (LER 76-23/1T). IT WAS DISCOVERED THAT FUEL DENSIFICATION PENALTY WAS NO SYSTEt1 CODE NOT APPL ICABL E 76 OIT 061876 T PROPERLY ItiCORPORATED INTO T ECil. SPECS. PREPARED FOR CYCLE 2,B At;D U C C0f1P0t4Et1T CODE 110T APPLICABLE 016701 2-WEEK ALCUL ATIONS C0tiFIRf1ED THAT ELIMItiATION OF IN T ERil A L V EllT VALVE BYPASS FLO SUBC0f1PONFHT NOT APPLICABLE W pet 1ALTY WOULD T10RE TilAti COMPENSATE FOR THIS ERROR.
PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED PERSONNEL ERROR IN TrtAT AN INCORP,EC T l'E AT FLUX TERM WAS USED IN THE INCO RPORATI0tl 0F FUEL DEtiSIFICATION PEl{ALTY. A TECH. SPEC. CHAtlGE WAS SUBMIT TED TO NRC FOR APPROVAL.
THREE MILE ISLAND-1 05000289 062276 (LER 76-26/3L). WHILE PERFORMING THE RADIATION f10tlITORING SYSTEM (RMS) M AIRBORiiE RADI0ACT MONITOR SYS 76 03L 071976 ONTHLY TEST, REACTOR BUILDIt4G PURGE EXHAUST MONIiOR Rfi-A 9 FAILED TO CLOS VALVES 015180 30-DAY E PURGE EXHAUST V ALVES All-V 1 A AND AH-VIB UPON RECEIPT OF A HICH RADIATIO NO SUCCOMP0tlENT PROVIDED fl TEST S I Gil A L. THE VALVES WERE THEll IfiMEDIATELY CLOSED MANUALLY.
PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED THE INTERLOCK AND ALARM RELAYS HAD BEEN REMOVED DURItlG CALIBRATION TO PR EVENT SPURIOUS ALARftS AND HAD NOT BEEtt PETURl4ED TO T HE RM-A? (10DUL E.
INS TRUMENT (1AINTENANCE PERSONNEL WERE COUNSELED.
THREE MILE ISLAND-1 05000289 080476 (LER 76-27/3L). DURING STARTUP OF THE MISCELLANEOUS WASTE EVAPORATOR, A LIQ RADI0ACT WSTE MANAGMNT SYS 76 03L 090276 LIQUID LEAK UAS OBSERVED FROM THE TERMIllAL BOX OF THE ELECTRICAL If1MERSI ilEATERS. ELECTRIC 016828 30-DAY ON HEATER ON Tile EVAPORATOR FEED TAliK LEAK WAS TERMIt1ATFD BY ISOLATING 3UBC0"PONENT tiO T APPLICABLE AND DRAINItiG THE EVAPORATOR FEED TANK COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED N0 f1ANUFACTURER SPECIFIED HEATER CLADDItiG MATERIAL HAD FAILED DUE TO PITTING CORROSTON. HEATER REP LACED BY AN IDENTICAL SPARE. (RILEY CEAIRD IMMERSION NEATLR, PART NO. HT Pd R 24 89-117-1310-8).
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APR 18, 1979 LER CUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 44 FR0f1 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY /SY3IEf1/
C u t1P O N F N T / C OMP O *4 E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSEcCAUSE SUECODE/
LER NO./
REPORT DATE/
EVENT DE!CRIPTION/
COMP 0t1Et4T MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCLIPTION THREE MILE ISLAND-1 05000289 081376 (ER76-28) VIOLATION OF THE ENVIRO. TECH. SPECS. IN THAT THE PLANT DISCHA CIRCULATING UATER SYS + CON 76 04T 082776 RGE WATER TEf1PERATURE WAS MORE THAN 3 DEGREES F.
LESS THAN THE RIVER WAT C 0:1P ollE N T CODE NOT APPLICABLE 015383 2-WEEK ER INLET TEMP. THE DELTA T EXCEEDED -3.0 DEG.
F.
FOR NEARLY THIRTY (30)
SUBCOMPONENT NOT APPLICABLE MItiUT ES WI TH A f1AXIMUM OF -4.0 DEG. F DELTA T.
EXTERNAL CAUSE CAUSE SUBCODE NOT PROVIDED I TEf1 NOT APPLICABLE A SEVERE THUNDERSTORf1 WHICH ACCOl1PANIED A COLD FRONT MOVING THRU THE ARE A CAUSED LOCAL AMBIENT AIR TEf1P. TO SHARPLY. DPOP FROM El TG 72 DEGS. Ill 20 MIN. THUS THE WATER FROM THE TOWERS WAS COLDER THAN EXPECTED.
THREE MILE ISLAND-1 05000289 083076 (LER 76-29/3L). THE REACTOR PROTECTION SYSTEM (RPS)
"D" CHANNEL TRIPPED REACTOR TRIP SYSTEMS 76 03L 092976 ON A FLUX / IMBALANCE / FLOW SIGNmL DUE TO A SHORT IN A J Ut4 C T IO N BOX. AT THE INSTRUMENTATIOil + CONTROLS 015866 30-DAY SAME TIME, THE RPS "C" C H A N!IE L WAS Ill f1ANU AL B) PASS FOR HEAT LALANCE AD NO S U B C 0t'P 0 t4 E N T PROVIDED JUS T f1ENT, WHICH C0t4STITUTED GPERATION IN A DEGRADED MODE ( 1 OUT OF 2 TR CGMPONENT. FAILURE IP LOGIC CONFIGURATI0ti).
CAUSE SUBCODE NOT PROVIDED NO MSNUFACTURER SPECIFIED SHORT WAS CORRECTED AND RPS "C" CHANNEL TAKEN OUT OF MA!1UAL BYPASS TO RE TURN TO 3 OPERABLE CHANNELS. ALL OTHER HI DETECTORS WILL BE EXAI11NED TO ELIMINATE POSSIBLE SHORTS.
THREE MILE ISLAND-1 05000289 083176 (LER 76-31/3L). WHILE CHECKING THE REACTOR COOLANT FRESSURE TRANSMITTERS ENGNRD SAFETY FEATR INSTR SYS 76 03L 093076 AND CORRESPONDING TRIP SETPOINTS, THE SETPOINTS WERE FOUND TO LE LESS C INSTRUTIENTATION + CONTROLS 015864 30-DAY ONSERVATIVE THAN REQUIRED BY Tech. SPECS. RPS CHANNELS L AND C WERE 1795 NO SUCC0f1PONENT PROVIDED AND 1787 PSIG RESPECTIVELY COMPARED TO THE T.S.
VALUE OF 1800 PSIG.
COMPONENT FAILURE CAUSE SUBCODE NOT FROVIDED NO MANUFACTURER SPECIFIED MINOR CALIBRATION DRIFT IN THE RCS PRESSURE T R A N Sf1I T T E R S. TRANS!!ITTERS W ERE RECALIBRATED AND TESTED. THE PROBLEf1 IS BEING STUDIED FURTHER FOR PO SSIBLE ADDITIONAL CORRECTIVE ACTION.
THREE MILE ISLAND-1 05000289 090176 (LER 76-30/3L). WHILE PERFORMING SURVFILLANCE ON RPS CHANNEL C, 1 0F THE REACTIVITY CONTROL SYSTEMS 76 03L 100176 ASSOCIATED CRD BREAKERS (CB-2) FAILED TO TRIP. Itt1EDI ATELY THE FAILED B CIRCUIT C L O S E R S / I t4 T ER R U P T E R S 015865 30-DAY REAKER WAS TRIPPED, EXERCISED, RETESTED, AND RETURNED TO SERVICE. REMAIN NO S U B C C MP O N E t4 T PROVIDED ING TRIP BREAKERS WERE ALSO TESTED.
CCMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED DIRT OR HARDENED GREASE APPEARED TO BIND THE OPERATING LINKAGE. LINKAGE WAS CLEAT 4ED AND LUBRICATED. UNDER VOLTAGE DEVICE WAS REPLACED TO PRECLUD E POSSISILITY OF A WEAK SPRING.
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APR 18, 1979 LER OUTPUT OM EVEt4TS AT THREE MILE ISLAND 1 AND ?
PAGE'45 FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVEliT DATE FACILITY / SYSTEM /
C O MP O N E ti T / C 0l1P O N E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CALSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
C0fiPONENT flANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 091576 (LER 76-32/3L). SHELL SIDE SAMPLES OBTAINED FROM THE MAKEUP ANL PURIFICA REAC COOL CLEANUP SYS + CONT 76 03L 101476 TION SYSTEf1 "B" LETDOWN COOLER C0t{FIFMED A IIINOR LEAK FPON THE REACTOR C HEAT EXCHANGERS 015970 0-DAY 00LANT SY S T Ef1 INTO THE ItiTERMEDIATE CLOSED COOLING SYSTEM (ICCS). THE "B NO SUBC0f1PONENT PROVIDED
" LETDOWtl COOLER WAS ISOLATED.
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED GRAHAM f1ANUFACTURING UNKNOWN UNTIL THE COOLER IS REPAIRED OR REPLACED DURING A FUTURE PLANT 0 UTAGE, COOLER MANUFACTURED BY GRAHAM MANUFACTURING CO.,
HELIFLOW TYPE, S IZE 3054C40LL.
THREE MILE ISLAND-1 05000289 091676 (LER 76-33/3L). THE HIGH REACTOR COOLANT PRESSURE TRIP SETPOINTS FOR REA REACIOR TRIP SYSTEMS 76 03L 101176 CTOR PROTECTION SYSTEf1 CHAT {NEL B WERE FOUND TO DE LESS CONSERVATIVE THAN INSTRUf1ENTATION + CONTROLS 015971 30-DAY THAT LISTED IN TABLE 2.3-1 0F THE TECHNICAL SPECIFICATIONS. SIf1ILAR EVE t10 SUSCOMP0hEtiT PROVIDED ti T S REPORTED IN 74-24, 75-15, 75-06, AND 7 6 - 31/ 3 L.
COMPPNENT FAILURE CAUSE SUBCODE t10T PROVIDED NO MANUFACTURER SPECIFIED DEFECTIVE TRAN9MITTER (WCSTIt{GHOUSE MODEL 59 PH). TRANSMITTER REPLACED W ITH A SP ARE BEtiCH-C AL IBRAT ED UNI T. AN INVESTIGATION IS CONTINUING.
THREE T1ILE ISLAND-1 05000289 092276 (LER 76-34/3L). WHILE TERMINATING A SAf1PLE FROM STEAM GENERATOR "A",
CON CN T NflN T ISOLATI0H SYS + CONT 76 03L 102076 TAINMENT ISOLATION VALVE CA-V4A FAILED TO FULLY CLOSE WHEtt ACTUATED BY I VALVE OPERATORS 016116 30-DAY TS REMOTE CONTROL SWITCH. REDUNDANT C0 tit Altil EliT ISOLATI0tl VALVE CA-VSA W tio SUBC0f1PONENT PROVIDED AS OPERABLE. SIf1IL AR EVEN1 REPORTED IN A0 75-06.
C OMP 0tiEN T FAILURE CAUSE SUSCODF 140T PROVIDED LIMITORQUE CORP.
LOOSE LOCKNUT ON VALVE OPERATOR. LOCKNUT WAS TIGHTENED AND VALVE CA-V4A CHECKED OUT SATISFACTORILY. VALVE OPERATOR BY LIf11 TORQUE, S!1B-000. S If11 L AR VALVE OPERATCRS WILL BE CHECKED.
THREE MILE ISLAND-1 05000289 100576 (ER 76-35) AT 1600 HOURS ON 10/5, A VIOLATION OF THE ETS 2.1.A(1) OCCURR CIRCULATING UATER SYS + CON 76 04X 100676 ED IN THAT THE PLAtiT RIVER WATER DISCH ARGE TEMPER ATURE EXCEEDED THE LIf1I COMPONENT CODE t10T APPLICABLF 016543 OTHER T OF 3 F BELOW INLET T Ef'P ER A T UR E. AS A RESULT OF AN INHCUSE AUDIT OF THE SUBCOMPONENT NOT APPLICABLE RIVER WATER DELTA T RECORDING FR0f1 JUL THRU SEP SHOWED 9 OTHER UNREPORT EXTERNAL CAUSE ED VIOLATIONS. THE DELTA T'S RANGED FROM -3.2 TO -3.6 DEGREES F.
CAUSE SUBCODE t10T PROVIDED IT Ef1 NOT APPLICABLE A REVIEW OF THE ABOVE VIOLATI0 tis INDICATE SHORT T R At4S I ENT S OF DECREASING DELTA T AS A RESULT OF CHANGING OUTSIDE Af1BIENT CONDITIONS.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 47 FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
Cor1PONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCWIPTION THREE T1ILE ISLAND-1 05000289 110676 (LER 76-40/3L). DURING PLANT C00LDOWN WHILE ESTABLISHING DECAY HEAT REMO RESIDUAL HEAT RLMOV SYS + CONT 76 03L 120376 VAL FLOW, VALVE DH-VI WAS OPENED. LEAK RATE PAST THE SEAL RING GASKET IN VALVES 016382 30-DAY CREASED TO ABOUT 30 TO 60 GPM COMPARED TO A RATE OF 0.2 TO 0.5 GPM WITH NO SUBCOMPONENT PROVIDED THE VALVE CLOSED. THE EVENT IS REPORTABLE UNDER T.S.
6.9.2.B (4). LEAK W COMPONENT FAILURE AS SEALED.
CAUSE SUBCODE NOT PROVIDED WALWORTH CO.
CAUSE WILL BE DETERMINED IN THE FUTURE WHEN VALVE IS DISASSEMBLED. VALVE (WALWORTH 12 IN. PRESSURE SEAL DOUBLE WEDGE GATE VALVE, 5262 PS, MOTOR OPERATED) WAS SHUT, AND LEAK SEALED.
THREE MILE ISLAND-1 05000289 110776 (LER 76-41/3L). DURING SHUTDOWN, ROUTINE SURVEILLANCE OF THE SNUBBERS LO COOLANT RECIRC SYS + CONTROLS 76 03L 120776 CATED INSIDE THE REACTOR BUILDING SECONDARY SHIELD WALL SHOWED ONE SNUBB HANGERS, SUPPORTS,SH0CK,SUPPRSS 016498 30-DAY ER LOCATED AT POSITION RC-14 ON THE PRESSURIZER SPRAY LINE TO HAVE AN EM NO SUBC0f1PONENT PROVIDED PTY FLUID RESERVOIR. THERE HAVE BEEN SEVERAL SIl1ILAR EVENTS IN THE PAST.
PERSONNEL ERROR CAUSE SUBC0CE NOT PROVIDED OTHER SEAL DAMAGE DUE TO IMPROPER INSTALLATION. ALSO, ONE 0-RING WAS MISSING.
SNUBBER WAS REBUILT AND SATISFACTORILY TESTED. SNUBBER BY BASIC ENGINEER S,
5" STROKE, SIZE 3/4".
THREE MILE ISLAND-1 05000289 112276 (LER 76-42/1T). DURING COLD SHUTDOWN, THE "B" DECAY HEAT RIVER WATER UND Ei1 ERG CORE COOLING SYS + CONT 76 01T 120776 ERGROUND PIPING CRACKED IMf1EDIATELY OUISIDE THE INTAKE PUMP AND SCREEN H PIPES, FITTINGS 016499 2-WEEK OUSE WALL JOINT. THE REACTOR BUILDING Ef1ERGENCY COOLING RIVER WATER "A" NO SUBCor1FONENT PROVIDED LINE WAS ALSO NEAR FAILURE. REDUNDANT SYSTEf15 WERE AVAILABLE.
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED OTHER SETTLEMENT OF ELBOW THRUST BLOCK WHICH RESULTED IN MISALIENNENT OF THE P IPE. PIPES WERE REPLACED OR REPAIRED AS REQUIRED.
20",
24" AND 30" PI?ES BY PRICE BROTHERS CO.
THREE MILE ISLAND-1 05000289 120776 (LER 76-44/3L). WHILE PERFORMING PREVENTATIVE MAINTENANCE PROCEDURE IC-4 AIR COND, HEAT, COOL, VENT SYSTEM 76 03L 010577 9,
THE REACTOR BUILDING PURGE SUPPLY VALVE (RBPSV), AH-V1D, COULD NOT BE VALVES 016661 30-DAY CLOSED AUTOMATICALLY. THE IN-SERIES VALVE, AH-V1C, WAS VERIFIED CLOSED NO SUBC0r1PONENT PROVIDED AND WAS TAGGED CLOSED. BEARINGS WERE FLUSHED AND LUBRICATED. VALVE CYCLE PERSONNEL ERROR D AND VERIFIED OPERABLE.
C/USE SUBCODE NOT PROVIDED SIMILAR OCCURRENCES REPORTED IN 75-17 AND 75-29.
OTHER BETTIS CORP. ROBOTARM ACTUATOR MODEL 80839 BK DC 1074-15R75 TO A PRATT 4 8 IN. BUTTERFLY VALVE MODEL R 1-A FAILED DUE TO INADEQUATE MAINTENANCE C IN3 AUSING ROLLER BEARINGS TO CORRODE.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 48 FROM 1969 TO THE PRESENT DUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT /C0tiPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUDCODE/
LER HO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTI0t1 TliREE MILE ISLAND-1 05000289 120876 (ER 76-48) ANALYSES OF SEDIMENT SAMPLES OBTAINED FRCM Tile ENVIRONS ON 10 SYSTEtt CODE NOT APPLICABLE 76 04X 121876
/21/76 YIELDED RADIONUCLIDE LEVELS AT ONE SEDIf1EtiT ItiDICATOR SATIPLE LOCA COMPONENT CODE NOT APPLICABLE 016544 O Til E R TION (1.5 MI. DOWf1S T R E All) T Ett T It1ES THE ItJ1EDIATE DOUNSTREAfl INDICATOR S SUBCOMPONENT NOT APPLICABLE TATION (0.5 MI. DOWNSTREAM) AND THE EACKGROUND STATION (0.7 MI. UPSTREAM OTHER
).
THEY ARE I-131.CO-58,MN-54,BA/LA-140,RU-103,CE-141,ZR/HB-95,1 CS-137.
CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE AFTER AN IN-DEPTH REVIEW OF STATI0tl. EFFLUENT DATA IT WAS DECIDED THAT TH E RADI0 ISOTOPES ARE PROBABLY tiOT DUE TO STATION OPERATION.
THREE MILE ISLAND-1 05000289 120876 (LER 76-45/3L). DURING t10RMAL OPERATION, A RADIATION MONITOR WAS REMOVED AIRBORNE RADIDACT MONITOR SYS 76 03L 123076 FROM SERVICE FOR CORRECTIVE MAlf4TENANCE WitICil CONSTITUTES OPERATI0t1 IN OillER C0t1PONENTS 016662 30-DAY A DECRADED MODE PERMITTED BY A LCO. M0!!ITOR EM-A2 WAS DRIED OUT AllD HEAT SUBCOMPONENT NOT APPLICABLE TRACING APPLIED TO Tite PIPING TO PREVENT FURTHER OCCURRENCES.
DESIGN / FABRICATION ERROR CAUSE SUSCODE NOT PROVIDED ITEM NOT APPLICABLE DESIGN OF THE SYSTEM. TEMPERATURE DIFFEREtICE BETWEEN MONITOR AND THE AIR M0t4ITORED CAUSED CONDENSATION Ill THE M0llITOR. WilILE Mot 4ITOR WAS JUT, GR AB SAMPLES WERE TAKEN.
THREE MILE ISLAND-1 05000289 121276 (LER 76-49/3L). DURING NORMAL OPERATION WHILE SAMPLING THE BORATED WATER RESIDUAL HEAT REMOV SYS + CONT 76 03L 010577 STORAGE TANK (BWST), PROCEDURE SP 1301-4.4 WAS NOT FOLLOWED. DELAY llEAT C0f1PONENT CODE NOT APPLICABLE 016663 30-DAY REf10 VAL PUMP "A" WAS NOT TESTED AND FOUND OPERABLE BEFORE USING DHR PUf:P SUBC071PONENT tl3T APPLICABLE "B"
TO RECIRCULATE THE BWST. DilR PUMP "B" UAS AVAILABLE TO PROVIDE LPI PERSONNEL ERROR IN EVENT OF ACCIDENT CONDITION.
CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE POOR COMMUNICATION BETWEEN PERSONNEL USING THE PROCEDURE. A PROCEDURE CH ANGE WAS ItlITIATED TO TEST THE REDutiDANT PUMP AS A REQUIREMENT RATHER TH AN A LIMIT AND PRECAUTION.
TilREE MIL E ISL At1D-1 05C00239 121376 (LER 76-46/IT). DURING TEST, CONCENTRATION OF BORIC ACID IN EWST WAS FOU CliEf t. VOL CONT + LIQ POISH SYS 76 Oli 122776 flD TO BE BELOW REQUIRED (1IllIMUM. HOWEVER, ADEQUATE BORON CONCENTRATION E COMPO:1EtiT CODE NOT APPLICABL?
016622 2-WEEK XISTED TO SAFELY SHUTD0Wil THE REACTOR. LATER ANALYSIS OF A KilCuti EORON C SUBCOMPONENT NOT APPLICABLf ONCENTRATION SHOWED TilAT ORIGINAL TESTS WERE GIVING VALUES 5:. DELOW Acid PERSONNEL ERROR AL VAlbES.
CAUSE SUSCODE NOT PROVIDED ITEM t4OT APPLICABLE STRATIFICATION OF BWST AND LEAKAGE OF UATER FROM DHRS WHICil DUTED WATE R IN THE EUST. CONCENTRATION WAS CORRECTED AND CilEMISTRY PERL.,t1NEL COUNS ELED ON AtlALYSIS TECHNIQUES.
IN.)
4s N
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4
APR 18, 1979 LER OUTPUT 0" EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 49 FROM 1969 TO THE PRESEtiT GUTPUT SORTED BY FACILITY AtiD EVEllT DATE FACILITY / SYSTEM /
COI1 patient / COMPONENT SUBCODE/
DOCKET NO./ EVEt:T DATE/
CAUSE/CAUSE SUBCODE/
LER tt 0. /
REPORT DATE/
EVENT DESCRIPTION /
C0flPONEt4T MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 121676 (LFR 76-47/1T). DURING THE PERIOD 12/3/76 TO 12/14/76, THE At10UN1 0F SOD Ct1TimHT COMBUS GAS CONTROL SYS 76 01T 122976 IUM HYDRNXICE IN THE SODIUM HYDROXIDE T AtiK WAS LESS T H Att THE SPECIFIED M O illE R CGMPONENTS 016623 2-WEEK ItilflUM, WilICli VIOL ATED A L IMITIliG C0tiDI TI0tl FOR OPERATI0ll. SI!1ILAR EVEtiT SUBCOMPONENT NOT APPLICABLE S REPORTED IN REPORTABLE OCCURREtiCES 74-17 AND 76-13.
PERSONNEL ERROR CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED P E R S 0 tin E L ERROR BY TECHNICI Ati AND HIS FOREf1AN IN MISREADING TWO PROCEDUR AL CURVES USED FOR CALCULATION OF THE CilEMICAL IN THE TANK. PROCEDURAL C URVES WILL BE CLARIFIED.
THREE MILE ISLAND-1 05000289 122176 (ER 76-50) THE MONTHLY COMPOSITE SURFACE WATER SAMPLE COLLECTED 11/4/76 SYSTFN CODE NOT APPLICABLE 76 04T 010177 THROUGH 11/30/76, YIELDED ZR-t1B-95 LEVELS AT OtlE INDICATOR LOCATION APPR COMPONENT CODE tt0T APPLICABLE 016650 2-WEEK OX 0.5 MILES DOWNSTREAM, T Eli TIMES GREATER TilAN Tile B ACKGROUND ST ATIOil A S U B C 0!!P O N E N T tiO T APPLICABLE PPROX 8.7 MILES UPSTREAM OF Tile STATION. INDICATOR: 4.4 +/- 0.7 PCI/L BA EXTERNAL CAUSE CKGROUND:
<0.4 PCI/L.
CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE THE SUBJECT SATIPLE IN ALL PROBABILITY IS NOT DUE TO STATION OPERATION. A ND SHOULD DE ATTRIBUTED TO FALLOUT FR0t1 THE ATl10 SPHERIC WEAP0tlS TESTS OF SEPTEMBER AND NOVEMBER, 1976.
THREE f11LE ISLAtID-1 05000289 020377 (77-1/1T) DURING NORMAL OPERATION THE "A"
DIESEL GENERATOR WOULD HOT STA Ef1 ERG GENERATOR SYS + CONTROLS 77 01T 021677 RT IN THE EVENT OF LOSS OF OFFSITE POWER WITHOUT AN ES SIGNAL. THIS IS N CIRCUIT CLOSERS / INTERRUPTERS 017050 2-WEEK OT A REPETITIVE OCCURRENCE. Tile "B" DIESEL GEllERATOR WAS DOWN FOR ANNUAL t10 SUBC0!1PONENT PROVIDED INSPECTION. (TS 3.7.2.C.)
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED CONSOLIDATED C0t4IROLS CORP.
CAUSED BY MECllANICAL BINDING OF Tile PRESSURE SWITCH PARTS. THE SWITCH WA S REPAIRED AND THE CRAtiKING TIMERS WERE SET FOR 10 SECONDS.
THREE MILE ISLAND-1 05000289 030977 (77-03/3L) DURING HORMAL OPERATION, WilIL E PERFORMING THE R.B.
SPRAY SYST REACTOR C0 tit AINTIENT SYSTEMS 77 03L 040877 EM CHANNEL TEST, THE R.B.
SPRAY PUt1P SUCTION ISOLATION VALVE FAILED TO C VALVE OPERATORS 017343 30-DAY LOSE WITH A REMOTE CONTROL S I Gtit.L. THE VALVE WAS MANUALLY CLOSED, FAILED tio SUBCOMPONEtiT PROVIDED TO OPEN WITil A REMOTE SIGNAL,AND WAS MANUALLY OPENED. THE VALVE MOTOR W C 0t1P O N Ell T FAILURE AS REPLACED AtID THE SPRING PACK WAS CLEANED.
C AUSE SUBCODE tiOT PROVIDED RELIAliCE ELECTRIC COMPANY GREASE IN THE SPRING PACK PREVENTED THE TORQUE SWITCH FROM STOPPING Tile MOTOR. MOTOR WAS REPLACED & EXCESS GREASE WAS REMOVED FROM SPRING PACK.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 50 FR0f1 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AhD EVENT DATE FACILITY / SYSTEM /
C 0f!P O N E N T / C 0f1P O N E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER t10./
REFORT DATE/
EVENT DESCRIPTION /
COMPONENT MAtiUFACIURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION T}iREE MILE ISLAND-1 05000289 032477 (77-6)DURING REFUELING SHUTDOUN.WHILE PREFORMING THE COMBINED LOCAL LEAK OTH:R SYSTEMS 77 03T 042977 R ATE T EST, Tile RESUL TS EXCEEDED THE ALLOWABLE VALUE. Tile V ALVES WITH THE VALVES 017610 2-UEEK GREATEST EXCESS WERE REPAIRED AND NEW VALVES WITil BETTER LEAK TIGHTt4ESS NO SUBCOMPONElli PROVIDED ARE BEING EVALUATED. THIS OCCURRENCE IS REPETITIVE.
C 0i1P O N E ti T FAILURE CAUSE SUBCODE NOT PROVIDED NO MANUFACTURER SPECIFIED SEVERAL VALUES DO NOT MAINTAIN TifEIR LEAK TIGHTNESS DUE TO WEAR. f1ETAL S HAVINGS DAMAGED THE SEATItiG SURFACES ON ONE VALVE.
THREE MILE ISLAND-1 05000289 041577 (77-4) DURING THE REFUELING OUTAGE, WHILE UPDATING OF THE VALVES NAf1E PL SYSTEf1 CODE 110T APPLICABLE 77 03T 042977 ATE DATA, THE VENDOR-CERTIFIED VALVE CAPACITY WAS FOUND TO BE LESS THAN C 0t1P O N EN T CODE NOT APPLICADLE 017611 2-WEEK THAT REQUIRED IN THE SAFETY ANALYSIS. THE ANALYSIS WAS RECOl1PUTED AND A SUBC0f1P0t4ENT 110 T APPLICABLE TECH. SPEC. CHANGE WILL BE SUBMITTED TO CORRECTLY STATE THE RELIEF CAPAC PERSONNEL ERROR ITY.
CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE A TOT AL C0f1BINED RELIEF VALVE CAP ACITY VALUE OF 623,400 LB/HR FR 001 VEND OR VALVE DRAWING WAS USED IN MAKING THE ASSUMPTION THAT 619,200 LB/HR WO ULD BE A SUITABLE VALUE TO USE IN THE SAFETY ANALYSIS.
THREE MIL E ISLAND-1 05000289 050477 (77-08/3L) DURING REFUELING SHUTDOWN A TEST OF StiUBBER. WAS PERFORMED TO SYSTEM CODE I40T APPLICABLE 77 03L 060377 SATISFY TECH SPEC REQUIREf1ENTS. THIS TEST REVEALED 45 SNUBBERS WHICH DI HANGERS, SUPPORTS, SHOCK.SUPPRSS 017949 30-DAY D NOT LOCK UP. THIS IS A REDUNDANT OCCURRENCE. ALL Sl4UBBERS WHICH FAILED NO SUBCOMP0tlEt4T PROVIDED WERE REPAIRED OR REPLACED.
OTHER CAUSE SUBCODE NOT PROVIDED ITEf1 NOT APPLICABLE MOST FAILED DUE TO IMPROPER ADJUSTMEtiT OF THE LOCKItiG VELOCITIES. THERE WAS ONE FAILED SEAL. THIS SEAL WAS REPLACED AND THE OTHERS ADJUSTED.
THREE MILE ISLAND-1 05000289 050977 (77-07/1T) DURING REFUELING SHUTDOWN BOTH DDORS OF THE RLaCTOR SUILDING REACTOR CONTAINMEtiT SYSTEMS 77 Oli 052377 Ef1ERGENCY PERSONNEL ACCESS HATCH WERE OPEN AT THE SAME TIME. THIS OCCURR P Et4ETR A TIONS.PRII;RY CON T AIhMNT 017752 2-WEEK ENCE HAS HAPPEt4ED TWO OTHER TIMES. BECAUSE THE OCCURREtiCE WAS P ARTI ALLY NO S U B C Ol1F O N E N T PROVIDED DUE TO MECHANICAL (DESIGN) FAILURE A tiEU DESIGN IS BEING EVALUATED.
DESIGN / FABRICATION ERROR CAUSE SUSCODE NOT FROVIDED CHICAGO BRIDGE I IRON COMPANY BY CLOSING THE DOOR AGAINST All DBSTRUCTION OR CLOSING IT TOO RAPIDLY CAU SED EXCESSIVE STRESS ON THE UPPER HINGE SHAFT EXTENSION CAUSIllG IT TO BE N
flD THEREFORE ALLOWING THE MECHANICAL INTERLOCK TO FAIL.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE irLE ISLAND 1 AND 2 PAGE 51 FR0t1 1969 TO THE PRESEtiT OUTPUT SORTED BY FACILITY AND EVEtiT DATE FACILITY / SYSTEM /
C0"PONENT/ COMPONENT SUBCODE/
DOCKET tio./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER tio./
REPORT DATE/
EVENT DESCRIPTION /
COMPONEt4T MANUFACTURER C0t4 TROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 051277 (77-09)
DURING STARTUP OPERATIONS STEAM GENERATOR LOCA CONSTRAIt4T BOLTI TURBINE-GENERATORS + CONTROLS 77 OIT 052677 NG WAS FOUND LOOSE.
ALL ACCESSILLE BOLTS WERE TIGitTENED AND LOCKING DEV HANGERS. SUPPORTS. SHOCK,5UPPRSS 021370 2-WEEK ICES WERE I tis T A L L ED.
NO SUBC0t1PONEt4T PROVIDED OTHER NOT APPLICABLE ITEM NOT APPLICABLE EITHER THE BOLTS WERE I!1 PROPERLY TIGHTENED DURING IllITI AL INSTALLATION O R LOOSENED DUE TO THERMAL CYCLING.
THREE MILE ISLAND-1 05000287 051777 (77-10)
DURING AN INSTRUMENTATION HEAT BALANCE CALIBRATICri AT 40% POWER OTHER FEAT /STM + POW CCHV SYS 77 01T 053177
- SIGNIFICANT DIFFERENCE NOTED PETWEFN GENERAT ED !"1 AND COMPUTER C ALCUL INSTRUMENTATION + CONTROLS 021369 2-WEEK ATED CORE THERMAL POWER.
CTP IN ERROR DUE TO FAILED STEAM PRESSURE TRAN NO SUBCOMPONENT PROVIDED 3MITTER.
R E DE N D A tlT TRANS. USED TO IIAKE CORRECT CALCULATI0t4S.
DEFECTIVE PROCEDURES NOT APPLICABLE FOXBORO CO.,
THE PRESSURE TRAtiSMITTER FAILED CAUSIt4G INCORRECT CALIBRATI0tl.
PROCEDURE TO BE CHANGED TO REQUIRE EVALUATI0 tis OF CALCULATI0 tis AND RECALIBRATION OF I tis T R UM EN T S.
THREE MILE ISLAND-1 05000289 051977 (77-12/3L) DURING NORMAL nPERATI0t4S ENGIllEERED SAFEGUARDS PUMP MU-P-1A W SYSTEM CODE NOT APPLICABLE 77 03L 061777 AS REMOVED FROM SERVICE PRIOR TO TESTIt4G THE REDUNDANT PUMP. THIS IS A R C 0t1P O N EN T CODE I40T APPLICABLE 017947 30-DAY EPETITIVE OCCURRENCE. THE REDUllD ANT PUMP WAS LATER TESTED AND FOREMAN, S SUBC0!iP0tlENT NOT APPLICABLE UPERVISORS AND C.R.
OPERATORS WERE BRIEFED Oil THE OCCURRENCE.
P E R S 0 tlN E L ERROR CAUSE SUBCODE NOT PROVIDED I T Et1 NO T APPLICABLE THE SHIFT FOREMAN FAILED TO IMPLEMEtiT THE REQUIRED TEST OF TiiE REDUNDANT PUMP.
THREE MILE ISLAND-1 05000289 051977 (77-11/IT) DURING POWER OPER ATIONS THE "1B" ENGIt4EERED S AFEGU ARDS t10 TOR EtlGNRD SAFETY FEATR INSTR SYS 77 OIT 060277 C0flTROL CENTER TRIPPED DUE TO NEC*iANICAL BINDIt4G OF THE TRIPPING STET 1 Oti CIRCUIT CLOSERS / INTERRUPTERS 017948 2-WEEK THE OVERLOAD DEVICE. REDUNDANT EQUIFt1EtiT WAS AV AIL ABL E.
THIS EVEllT OCCU NO SUBCOMPONENT PROVIDED RED ONE OTHER TIME. A NEW OVERLOAD DEVICE WAS EXCHANGED.
DESIGN /FABRICATI0tl ERROR CAUSE SHBCODE NOT PROVIDED WESTINGHOUSE ELECTRIC CORP.
OCCURREt1CE WAS DUE TO A STUCK TRIPPIt4G STEM ON THE OVERLOAD DEVICE, UEST It4GHOUSE DB 50 CIRCUIT BREAKER, 1600 At1PS 600 V AC, 1000 AMP 60 CYCLE.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAUD 1 AND 2 PAGE 52 FRO:1 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUSCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MAMUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 n5000289 052377 (ER 77-13/4T) DURING NORMAL OPERATION THE TSS CONCENTRATION OF THE RIVER SYSTEM CODE NOT APPLICABLE 77
^T 060677 UATER DISCHARGE EXCEEDED DESIGN MAX. REDUNDANT S Y S T E!15 UERE NOT AVAILAB COMPONENT CODE NOT APPLICABLE 018200 2-WEEK LE FOR THIS REPETITIVE OCCURRENCE. DISCHARGE WAS IMMEDIATELY TERMINATED.
SUCCOMPONENT NOT APPLICABLE THE LEAKING SAMPLE PIPE WILL BE REPAIRED. MAXIMUM CONC. REACHED 760 PPM OTHER CAUSE SUBCODE NOT PROVIDED ITEM NOT APPLICABLE A SLUG OF SUSPENDED SOLIDS COULD HAVE BROKEN LODSE DURING SAMPLING AND P ROVIDED A SAMPLE WITH A TSS CONCENTRATION GREATER THAN THE REPRESENTATIV E EFFLUENT.
THREE MILE ISLAND-1 05000289 052477 (77-14/3L) DURING NORMAL OPERATIONS, WHILE PERFORMING THE " REACTOR BUILD CNTNMNT ISOLATION SYS + CONT 77 03L 062377 TNG COOLING AND ISOLATION SYSTEM LOGIC CHANNEL AND COMPONENT TEST", REAC VALVES 018256 30-DAY TOR BUILDING COOLING RETURN ISOLATION VALVE, RB-VT, FAILED TO CLOSE UPON NO SUBCOMPONENT PROVIDEC RECEIPT OF AN E.S.
SIGNAL. THE VALVE WAS MANUALLY OPERATED AND THE SCLE COMPONENT FAILURE NOID VALVE OPERATOR WAS CLEANED. THE SYSTEM WAS TESTED SATISFACTORILY.
CAUSE SUBCODE NOT PROVIDED OTHER DIRT ON THE SEAT OF THE DIAPHRAGM ASSEMBLY OF THE SOLENGID VALVE SUPPLYI HG AIR TO RB-V7 PREVENTED THE DISC FRCM PROPERLY SEATING. ASCO 3 WAY SOL ENOID VALVE, 120V D.C.,
SCLENDID CATALOG NO. 80173, SERIAL NO. 42471B.
THREE MILE ISLAND-1 05000289 052977 (77-15/311 DURING NORMAL OPERATION. 230 KV SUBSTATION BUS 4 DE-ENERGIZED AC ONSITE POWER SYS + CONTROLS 77 03L 062877 BY DIFFERENTIAL RELAY 87BB-1. BUS 4 AND AUX. TRANSFORMLR RETURNED TO SE COMPONENT CODE NOT APPLICARLE Dio257 30-DAY RVICE IN TWO HOURS. ELECTRICAL SYSTEM RETURNED TO NORMAL LINEUP.
SUBCOMPn4ENT NOT APPLICABLE u!HER CAUSE SUBCODE NOT PROVIDED OTHER DRAWINGS WILL BE CORRECTED BY SEPTEMBER.
ITEM NOT APPLICABLE THERE WAS A WIRING ERROR ON THE AUXILIARY TRANSFORMER EUE TO AN ERROR IN THE DRAWINGS. THIS ERROR SHOWED THE DDT WHICH INDICATES POLARITY TO BE INCORRECTLY PLACED UN THE DRAWING. FIELD COPY OF DRAUING CORRECTED.
THREE MILE ISLAND-1 05000289 071377 (77-19)
LEAK IN MISCELLANEOUS WASTE EVAPORATOR FEED TANK EMERSION HEATE LIQ RADIDACT USTE MANAGMNT SYS 77 03L 081277 R SHORTED OUT HEATER & FEED PUMP.
HEATER REPLACED.
OPERATING PROCEDURE HEATERS, ELECTRIC 018771 30-DAY MODIFIEL TO PREVENT FLOW OF LIQUID FROM ENTERING STEAM TUBES DURING EVA SUSCOMPONENT NOT APPLICABLE P0 RATION SHUT DOWN.
THIS IS A REPETITIVE OCCURRENCE.
COMPONENT FAILURE CAUSE SUBCODE NOT PROVIDED RAW WATER HEATER (STEAM TASKS) AMF-YORK RAY D.
PAK EVAPORATOR, U TUBE CO OTHER HSTRUCTION. 316 L MATERIAL, 18 BU6 5/8 IN DIA. TUBE TYPE.
THE HEATING ELEMENT FAILED DUE TO PITTING OF SURFACE C AUSING L EAK IN TEM P PROBE.
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PAK EVAPORATOR, RILEY DEAIRD E!1ERSION HEATER GKW 480V3 r s)
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JUTPUT ON EVENTS AT THREE MILE I S L AtiD 1 AND 2 FAGE 53 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
~
C OMP 0 t4 E N T / C OMP O N E ti T SUBCODE/
DOCKET NO./ EV E tit DATE/
CAUSE/CAUSE SUBCODE/
LER 110./
REPORT DATE/
EVENT DESCRIPTION /
COMP 0t4ENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 0S000289 071977 (ER 77-20) DURING NORt1AL OPERATI0 tis A STORM FRONT PASSED THROUGH THE ARE OTHER SYSTEMS 77 OAT 080277 A I N C R E A S Il1G THE WIND VELOCITY AND DECREASING THE AIR TETIPERATURE FRO 1 9 COMPONENT CODE NOT APPLICABLE 018527 2-WEEK 4 DEGREES F TO 82 DEGREES F.
THIS CAUSED MDCT TO COOL OUTLET WATER GREA SUBC0i1PONEtiT fl0T APPLICABLE TER THAN ALLOWED BY 3 DEG F BELOW INLET WATER TEf1P. L It1I T.
MDCT FANS WE EXTERNAL CAUSE RE SHUT OFF & OUTLET TEMP. RETURNED TO WITHIN L I!11 T S. ( E T S 2.'.A(1))
CAUSE SUBCODL NOT PROVIDED ITEM NOT APPLICABLE THE CAUSE OF THIS OCCURRENCE WAS DUE TO A STORM FR0 fit T10VING THROUGH THE AREA 0F THE PLANT.
THREE MILE ISLAND-1 05000289 072577 (77-21)
RADIATION MONITOR RM-A2 WAS OUT OF SERVICE & AN ATMOSPHERE sal 1P AIRBORNE RADI0ACT MONITOR SYS 77 Oli 080977 LE OF R.E.
WAS NOT PERFORMED.
THE T10NITOR WAS REPAIRED 3 A SAf1PLE OF R.
INSIRUMENTATION + C 0 tl i R O L S 018772 2-WEEK B.
ATMOSPHERE WAS TAKEN.
THIS IS A REPETITIOUS OCCURRENCE.
( 7 7 -21/1 T )
NO SUBCOMPONENT PROVIDED DEFECTIVE PROCEDURES CAUSE SUBCODE t10 T PROVIDED ITEM NOT APPLICABLE MONITOR LEAKED DUE TO A FAILURE TO ENSURE THE O-RING WAS Iti PLACE PRIOR TO RETURNIttG THE DETECTOR TO THE SAMPLE CHAf1BER.
PROCEDURE TO BE REVISE D.
THREE MILE ISLAND-1 05000289 082577 (77-22) DURING NORMAL OPERATIONS, RESTRICTI0 tis UERE PLACED ON DECA ( LEAT RESIDUAL HEAT REMOV SYS + CONT 77 Oli 090877 REMOVAL PUf1PS WHICH WERE FOUt4D CONTRARY TO PUMPS OPERATItiG CAPABILITY A P Uf1P S 019383 2-WEEK S STATED IN FSAR.
THESE RESTRICTI0 tis WERE CREATED DUE TO FAILURE OF A 5 NO SUBC0f1P0tiENT PROVIDED IMILAR PUMP AT ANOTHER UTILITY.
OTHER C AUSE SUBCODE tiOT PROVIDED WO R T H I t4 G T 0 ti CORP.
NSSS VENDOR PLACED RESTRICTIONS ON PUMP DUE TO FAILURE OF SIMILAR PUMP A T Att0THER UTILITY.
THREE MILE ISLAND-1 0S000289 092077 (77-23) DURING ROUTINE HEATUP OPERATI0ti, BOTH DOORS OF REACTOR BUILDItiG REACTOR CONTAINMEtli SYSTEMS 77 01T 100477 EMERGENCY PERSONtlEL ACCESS HATCH WERE OPEN AT SAME TIf1E.
DOORS UEPE CLO PENETRATIONS PRIMRY CONTAINMNT 019384 2-WEEK SE0 WITHIN 10 MINUTES.
REPETITIVE OCCURRENCE.
ADDITIONAL ItiTERLOCK DEV NO SUBC0r:PONENT PROVIDED ICE WILL BE INSTALLED TO PREVEt4T THIS OCCURRENCE.
DESIGtt/ FABRICATION ERROR CAUSE SUBCCDE tiOT PROVIDED CHICAGO BRIDGE & IRON CP'IPANY FAILURE OF Ic1TERLUCK DEVICE, POOR DESIGN OF HATCH, & Ill ACCUR AT E TR AINIttG GF OPERATOR WERE THE CAUSES OF THIS OCCURREtiCE.
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a
APR 18, 1979 LER OUTPUT OH EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 56 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVEN! DESCRIPTION /
COMPollENT MANUFACTURER CONTROL li0. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAtID-1 05000289 011778 CLOSING MU-V74A TO ISOLATE MU-PIA FOR REPAILi, 22 GPM PACKIt4G GLAt1D LEAK REAC COOL CLEANUP SYS + CONT 78-004/03L-0 020378 DEVELOPED. LEAK LASTED ABOUT 12 MIN BEFORE VALVE PLACED ON BACKSEAT. SI VALVES 020294 30-DAY MILAR EVENTS: 77-31/3L. REPORTABLE PER T.S.
6.9.2.B(2), UNDER LCO T.S.
3 BALL
,1.6.1.
ALSO REPCRTABLE PER 10 CFR 20.403 (B) (2). SIllCE CONC EXCEEDED 5 DESIGN / FABRICATION ERROR 90 TIMES VALUES SPECIFIED IN APPENDIX B, TABLE II, COLUMN 2.
LEAKAGE ROU DESIGti TED TO LWDS FOR PROCESSING. NO TilR E A T 10 llEALTil/ SAFETY OF PUBLIC.
ALOYCO, INC.
W0kN PACKING IN Tile VALVE. AFTER LEAK NOTED, VALVE PLACED ON BACKSEAT. O ti 1/18/78 PACKING REPLACED. SIZE: 3 INCH; MODE OF ACTUATION: N A tlU A L, REM OTE HANDWHEEL; BODY MATERIAL: SS; DESIGH PRESSURE: 3050 PSI; NUCLEAR CLA SS: II; SEISMIC CLASS:
I.
THREE MILE ISLAtID-1 05000289 011978 AT PLANT OPERATION REVIEW COMMITTEE MEETIl>G 1/19/78, DETERMINED CONTAIHM EMERG CORE C0 CLING SYS + CONT 78-005/01T-0 020278 ENT INTEGRITY, DEFINED BY T.S.
1.7, llAD BENN VIOLATED. BS-V47A/B WERE OP COMPONENT CODE t10 T APPL IC ABL E 020293 2-WEEK ENED DURING THE BS PUMP OPERABILITY TEST, OPERATING PROCEDURE OP1104-5, SUBCOMPONENT NOT APPLICABLE AtlD ISI TEST 1300-3A. REPORTABLE PER T.S.
6.9.2.A(2),
BECAUSE BS-V30A/B DEFECTIVE PROCLDURES PREVENTED ACTUAL FLOW FROM THE R.B.
TO Tile AUX. B U I L DI tlG, NO THREAT TO H NOT APPLICABLE EALTil AtlD SAFETY OF PUBLIC.
ITEM NOT APPLICABLE CPERATiNG PRLCEDURE OP1104-5 At4D ISI TEST 1300-3A ALLOW OPENING OF BS-V4 7A/B WHEtt THE JS PUMP OPERATING TO PREVEtiT SPRAYING R.B.
SHoutD LEAKAGE THROUGli BS--V I A/ 9 OCCUR. TCH NOTED Ill 24-110UR TELEGRAM TERMINATE OPERATIO N OF BS-V47A/B hyr tiEEDED. OP1101-3 TO BE REVISED TO PERMIT OPENING BS-V 4/A/B UllD E R CONTROLLED TEST PERIODS.
filREE MIL E ISLAND-1 05000289 012878 AT 50% POWER TO PERFORM TURBINE STOP VALVE TESTING AND MANEUVER CONTROL REACTIVITY C0t1 TROL SYSTEMS 78-007/03L-0 022478 RODS TO ALL OUT CONFIGURATI0li INCORE QUADRANT POWER TILT LIMIT
+2.66*
WA CONTROL RODS 023320 30-DAY S EXCEEDED VIOLATING T.S.
3.5.2.4.A.
REAtiUR POWER WAS BELOW LIMI.S OF SUBCOMP0tlENT NOT APPLICABLE 3.5.2.4.D AND ACTION R E Ql' T D EM EN T S OF 3.5.2.4.D AND E WERE SATISFIED.
NO OTHER THREAT TO PUBLIC HEALTI:
a? SAFETY.
OTHER EVENTS OF THIS TYPE:
77-26/
NOT APPLICABLE IT.
ITEM NOT APPLICABLE QUADRANT POWER TILT !RANSIENT APPEARS TO HAVE BEEtt CAUSED BY TRANSIEt1T P OWER OPERATIONS AND MANEUVERING TO ALL RODS OU! CONFIGURATION.
TILT I tic REASED WHEN GP.00P 7 CONTROL RODS WERE PAST 40*. WITHDRAWN At1D REACHED +3.
8% WHEN RODS WERE AT 285 RCD INDEX.
AS XLtuti BEGAti TO BURN OUT TILT STA RTED TO RETURil WITilIN LIMITS.
THREE MILE ISLAND-1 05000289 020278 IN ACCORDAt1CE WITil A BtW RECOMMEllDED OPERATItiG PROCEDURE, TMI-1 liAS BEEtt SYSTEM CODE NOT APPLICABLE 78-008/01T-0 021678 FLOODING OTSG FEEDUATER N0ZZLES DURING OPERATIGH BELOW 5% FULL POWER. T COMPONENT CODE NOT APPLICABLE 020443 2-WEEK HIS CollDITION WAS tt0T ANALYZED fH Tile FSAR AND IS THEREFORE REP 0k'.ABLE P SUBCOMPONEtif fl0 T APPLICABLE ER 6.9.2.A(9). BECAUSE THIS SITUATI0tl OCCURS OilLY DURING STARTUP AND Sl!U DEFECTIVE PROCEDURES TDOWN, THE PROBABILITY OF A STEAM LINE BREAK OCCURRIllG AS ANALYZED.
NOT APPLICADLE ITEM 110T APPLICABLE WilEN MAlti STEAM LINE BREAK ANALYSIS ORIGINALLY PERFORMED, B8W RECOMMEtIDE D 30" WATER LEVEL IN OTSG'S AT LOW POWER LEVELS. AS B&W GAINED OPERATING py EXPERIENCE. FLOODIllG OF FEEDUATER H0ZZLES AT LOW POWER LEVELS RCCOMMEND
' 2' ED TO PREVENT THERMAL SHOCXING OF N0ZZLES. SilUTDOWN AliD COOLDOWN PROCEDU RES CHAT 4GED TO PREVENT FLOODING tt0ZZL ES WilEN BELOW 5*.
FULL POWER.
LN C Z?
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APR 18, 1979 LER QUTPUT ON EVENTS AT THREE MILE ISL At4D 1 At4D 2 PAGE 53 FROM 1969 TO THE PRESENT CUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT /CGMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUECODE/
LER :0. /
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 050278 DURING INITIAL CYCLE 4 STARTUP INCREASING POWER TO 40?. CONTROL RODS WERE SYSTEM CODE f40T APPLICABLE 78-015/01T-0 051578 P O S I T I 0 t4 ED I ti RESTRICTED REGION OF T.S.
ilGURE 3.5-2A.
CCRRECT RCD I t4 D C 0t4 T RO L RODS 021615 2-WEEK EX LIMIT CURVE WHICH HAD BEEN INCORPORATED ItiTO OPERATING FROCEDURES AS SU B C0!1P ON EN T N0i APPLICABLE A TEMPORARY CHANGE NOTICE WAS NOT EEING USED.
C 0 ti T R O L RODS HAD BCEli IN PERSONNEL ERROR THE NOT ALLOWED REGI0ti 0F T.S.
FIGURE 3.5-2A FOR HINE HOURS.
LICENSED & SEllIOR OPERATORS BABCOCK & WILCOX C0t1P A NY EVENT CAUSED BY USE OF R0D INDEX LIMIT CURVE LAEELED FOR CYCLE 4, 0-125 EFPD INSTEAD OF THE REVISED CYCLE 4, 0-125 EFPD RCD IsiDEX LIMIT CURVE.
THREE MILE ISLAND-1 05000289 050378 ON COMPLETION OF BOUNDING ANALYSIS FOR PEAK RCS PRESSURE FOLLOWING A FEE SYSTEM CODE tt 0 T APPLICABLE 78-016/01T-0 051778 DWATFR LINE BREAK ACCIDENT VS. HIGH PRESSURE TRIP SETPOINT CONSERVATIVE COMP 0 t4 E N T CCDE tiOT APPLIC ABL E 021614 2-WEEK DOFPLER COEFFICIENT AtiD VARYING MODERATOR COEFFICIENTS, Bau IDEtiTIFIED F SUBCOMPONENT NOT APPLICABLE OR CYCLE 4 PARAMETERS THAT PEAK RCS PRESSJRE EXCEEDS MAXICUM ALLOWAELE P OTHER RESSURE OF 2750 PSIG BY ABOUT 4.4 PSIG.
REPORTABLE PER T.S.6 9.2.A(8).
NOT APPLICABLE NO THREAT TO HEALTH AND SAFETY OF PUBLIC.
ITEM NOT APPLICABLE PRIMARILY RESULT OF ASSUMING LARGER I tis T R UMEN T ERROR ASSOCIATED WITH FRE SSURE SENSOR.
ORIGINAL A t4 A L YSI S ASSUt1ED Ati I t4 S T R U M E N T ERROR OF 30 PSI.
REAN ALYSIS ASSUMED It4STRUMEtiT ERROR OF 45 PSI TO ACCOUNT FOR POSSIBLE SE HSOR DEGRADATION UNDER P.CCIDENT E tlV I R O NM Ell!.
1HREE MILE ISLAND-1 05000289 050578 IN ACCORDANCE WITH T.S.
6.9.2.A(8), WE REPORT AN ERROR DISCOVERED IN UNC SYSTEM C00t 61T APPLICABLE 78-017/011-0 031978 ERTAINTIES FOR MEASUREMENTS OF It1EALANCE AtiD QUADRANi POMER TILT PERFORM I N S T RUMEt4 T A '.10 tl + CONTROLS 021236 2-WEEe ED BY ItiCORE DETECTOR SYSTEM WHICH COULD HAVE PERf1ITTED REACTOR OPERATIO SENSOR /DE' ECTOR/ EL ETIEtiT H LESS C0t4SERVATIVE THAtt ASSUMED Iti SAR.
CUE TO OTHER CONSERVATISMS I ti OTHER prarING ANALYSIS, UNLIKELY THAT LOCA LIMITS WOULD BE VIOLATED EVEtt IN UN HOT APPLICABLE LIKELf LOSS OF COOLANT ACCIDENT.
BELFAB/ BAILEY METER CO.
MET INFlRMED BY Blu THAT A STUDY OF INCORE DETECTOR DATA FROM CPERATING Bau REACTORS HAD DETERMINED THAT MEASUREMENT It4 ACCURACIES OF IhCORE DETE CTOR SYSTt3 AR E GR E AT ER THAN GRIGItiALLY A S S Ut1E D.
PROCEPURE CHAT:GES UITH REDUCED TItT LIMITS HAVE DEEN IMPL EMEtiT ED.
T.S.
CHANGE HAS BEEN SULMIT TED.
THREE MILE ISLAND-1 05000289 051978 ItiSPECTItlG pr TEF VALVE PIPING, A/E'S FIELD E t4 GI N E E R S DISCOVERED 2 RESTR MAIN STEAM SUPPLY SYS + CONT 78-018/01T-0 060273 A I ri T S NOT 1
.ALLED Oli EM E R G E tiCY FEED PUt:P TURBINE M Alti STEAM SUPPLY L I ti HANGERS, SUPPORTS, SHOCK,SUPPRSS 021613 2-WEEK E RELIEF VA;/ES PIPING DRAWIl4G.
IF MS-V22A/B REQUIRED 10 ACTUATE DUE T OTHER 0 TRANSIENT OR FAILURE, FAILURE OF RELIEF DISCH ARGE FL EXIBL E CON!iECTION DESIGN /FABRICATI0t1 ERROR COULD RFSULT.
POTENTIALLY UNSAFE C0!1DITION U3ULD OCCUR I ti EV Ef 4 T OF FIRE CONS TRUCT ION / Itis T AL L ATION REQUI:<ING EVACUATICtl 0F C 0 t41 R O L RCOM CONCURRENT WITH DISCHARGE LItiE FAI UNITED EhG. & C0 tis T R UC T., INC.
LURE RELIL DISCHARGE RESTRAINTS NOT Itis T A L L ED DURIt1G LONS T RUCT I0ti AS REGUIRE D.
Ih'1EDIATE CORRECTIVE ACTION:
RESTRICT NONESSEt4T I AL ACCESS TO RELIEF PJ VALVE AREA AND INITIATE ENGIt4EERIliG DESIGN OF PROPER RESTRAINTS.
EACH J>
OPERATIt4G SHIFT ADVISED OF EMERGENCY ACTI0ti TO ISOLATE SUCH A FAILURE.
LN
( 23 4
i APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 59 FROM 1969 TO THE PRESENT CUTPUT SORTED BY FACILITY AND EV Et4 T DATE FACILITY / SYSTEM /
COMPONENT /CCMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
C OM P 0 h Et4 T MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-4 05000289 060578 PERFORMING SP 1303-S.1 RtACTOR BLDG. COOLANT At4D ISO SYS LOGIC CHANNEL &
AIR C0r4D, HE A T. COOL, VEN T SYSTEM 78-019/03L-0 062278 C0t1P ONE N T TEST CONTROL FUST OPEt4ED AND RS-V-7 DID NOT OPERATE.
REACIOR RELAYS 021954 30-DAY SLDG.
C00'. ING SYS IS A CLOSED SYS INSIDE REACTOR BLDG.
THUS NO THREAT OTHER TO HEALTH AND SAFETY OF PUBLIC EXISTED WHILE VALVE WAS OUT OF SERVICE.
COMPONENT FAILURE REPORTABLE PER T.S.
6.9.2.B.(2) AND REPRESENTS DEGRADED M3DE UNDER T.S.
ELECTRICAL 3.6.6.
LER 77-14 REPORTED A SIMILAR EVENT.
OTHER VALVE FAILED DUE TO BLOWN FUSE IN CLNTROL CIRCUIT.
VOLTAGE SPIKE SUPFRE SSION (THYRECTOR) ACROSS THE COI' 0F Att AUXILIARY RELAY FAILED CAUSING S HORT CIRCUIT.
THYRECTOR REPLACED At4D VALVE FUNCTIONED AS DESIGNED.
VAL VE RETURNED TO FULL OPERABILITY WITHIN 24 HOURS.
THREE MILE ISLAND-1 05000289 061478 SEVEN OF hit 4E CONTRCL RODS IN GROUP 3 INADVERTANTLY DROPPED INTO CORE RE REACTIVITY C 0;4 T R C L SYSTEMS 78-020/0tT-0 062878 SULTING IN OPERATION WITH MORE THAtt ONE I riOP E R A B L E ROD PER T.S.
4.7.1.2.
CONTROL R0D DRIVE NECHANISMS 021953 2-WEEK VIOLATION OF T.S.
3.5.2.2.A. AND ROD ItiDEX LIMITS OF T.S.
3.5.2.5.E.
SUBC0ftPONENT t40 T APPLICABLE DURING FOLLOWING TRAt4SIENT QUADRANT POWER TILT LIMIT OF T.S.
3.5.2.4.A W COMPONENT FAILURE AS EXCEEDED BUT RETURNED TO ACCEPTABL5 VALUE IN FOUR HOURS.
POWER REDUC ELECTRICAL ED TO 40* IMMEDIATELY At4D CONTROL ROL ASYMt1ETRY CLEARED It1 Ot4E HOUR WITH DIAMOND POWER SPECIALTY CORP.
SHUTDOWN MARGIN ABOVE 1 *. DELTA K/K.
DROPPED RODS CAUSED BY SHORTED DIODE IN DC HOLD SECONDARY POWER SUPPLY.
SHORTED DIODE AND BLOWN FUSES CAUSED LOJ VOLTAGE FROM SECONDARY SUPPLY.
WHET 4 TRIP DREAKERS FOR MAIN SUPPLY TESTED DURIt4G RPS SURVEILLANCE, ROD S DROPPED BECAUSE GF LOW VOLTAGE.
FUSES AND DIODE REPLACED AtID OUTPUT U AVE FORMS CHECKED.
THREE MILE ISLAND-1 05000289 G72378 DISCOVEREE AT 1452 A EMERGEt4CY D:!SEL GENERATOR AIR VALVE HAD CEEN TAGGE EMERG GEt4ER ATOR SYS + Ca t4 T R O L S 78-022/03L-0 081178 D SHUT AT 1115 DURING ISC SYS MAia EN ANCE REtiDERING A DIESEt INOPERABLE.
VALVES 022054 30-DAY CONTRARY TO TS 3.7.2.C, REDUNDANT DIESEL WAS NOT IMMEDIATELY TESTED.
OTHER REFORTABLE PER TS 6.9.2.B.(3).
B DIESEL WAS SUCCESSFULLY TESTED.
A DIE PERSONNEL EPROR SEL WAS RETURt4ED TO SERVICE UPON C0tPLETION OF ITS REQUIRED SURVEILLANCE LICEt4 SED & SENIOR OPERATORS 14 0 THREAT TO HEALTH At4D SAFETY OF THE PUBLIC.
ITLM NOT APPLICACLE CAUSE FOR TAGGING OUT A DIESEL WITHOUT TESTING B DIESEL WAS PERSONNEL ER ROR.
AlL PFRSONNEL HAVE BEEN It4 FORMED OF THEIR IMPROPER ACTIONS.
AlL 0 PERATIONS DEPARTMENT P ER S O N t4 E L HAVE BEEN REBRIEFED ON IMPORTANCE OF PROP ER TESTING OF REDUNDANT ES SYSTEMS.
THREE MILE ISLAND-1 05000289 080578 DURING A POWER REDUCTION TO 65% FULL POWER FOR TURBINE STOP VALVE TESTIt4 REtCTIVITY CONTROL SYSTEMS 78-023/03L-0 083078 G.
TNE INCORE DETECTOR QUADRANT POWER TILT L ITII T OF 3.64*. WAS EXCEEDED F CONTROL RODS 022384 30-DAY OR A TOTAL OF FIFTY MINUTES IN VIOLATION OF T.S.
3.5.2.4.A.
REFORTAblE SUBCCMPONENT NOT APPLICABLE PER T.S.
6.9.2.B(2).
THE MAXIMut! TILT EXPERIEt4CED WAS +3.79L THE TILT OTHER WAS RETURNED WITHIN LIf1ITS BEFORE POWER WAS It4 CREASED AB0VE 75L IULL PO NOT APPLICABLE WER.
ITEM NOT APPLICABLE TILT TRANSIENT CAUSED BY COMBINATION OF XENON BUILDUP AND CONTROL POD IN SERTION ASSOC. WITH PL ant 4ED REDUC TI0tt TO 65L FULL POWER. SINCE POWER ALR EADY BELOW POWER LEVEL CUTOFF NO IM1EDIATE CORRECTIVE ACTION REQUIRED. X N
ENON BURNOUT AND ROD WITHDRAWAL ASSOC. WITH RETURNING POWER TO 75*. REDUC ED TILT TO ALLOWABLE.
V s
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MIL E ISL'iD 1 AND 2 PAGE 60 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVEtiT DAT E FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET No./ EVENT DATE/
CAUSE/CAUSE SUBCOEE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT mat 4UFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 080778 MET-ED RECEIVED NOTIFICATION F R 0t' B&W THAT WELD FILLER UIRE ATYPICAL GF RLACTOR VES. + APPURTENANCES 78-024/01T-0 082178 WIRE SPECIFIED BY B&W MAY HAVE BEEN USED IN CONSTRUCTION OF THE It1I-1 RE VESSELS, PRESSURE 0220S3 2-WEEK ACTOR VESSEL.
REPORTABLE PER T.S.
6.9.2.A.(9).
THE STRUCTURAL INTEGRI; REACTOR VESSEL Y OF THE VESSEL IS NOT COMPRCMISED AND NO THREAT TO PUBLIC HEALTH AliD SA DESIGN / FABRICATION ERROR FETY IS INVOLVED.
r1 Attuf ACTURING BABCOCK & WILCOX COMPANY ATYPICAL WELD WIRE WAS UNKt10WINGLY MIXED BY THE SUPPLIER Iti A SHIFMENT 0 F WIPE TO B&W.
BtW DISCOVERED THIS CONDITION DURING CHEt11 CAL ANALYSIS 0 F ARCHIVE WELDMENTS.
WHILE A REVISED TECH SPEC IS BEING PREPARED, PRLLI MINARY INFORMATI0tl SUPPLIED BY B&W WILL BE USED TO GOVERN P-T HEATUP & C 00LDOWN.
THREE MILE ISLAND-1 05000289 081978 FOR A PERIOD OF TIME FROM 0440 HOURS ON 18 AUGUST 1973 UNTIL 1400 NOURS AIRBORNE RADI0ACT M0tlITOR SYS 78-025/01T-0 033078 ON 19 AUGUST 1978. NEITHER OF THE TWO INSERVICE HUCLEAR RIVER PUMP 3 UAS PUMPS 022383 2-WEEK SELECTED TO START ON AN E.S.
SIGNAL.
TilIS IS A VIOLATION OF T.S.
3.3 AN OTHER D REPORTABLE PER T.S.
6.9.2.A.
THE C0tlSECUENCE OF T ilI S ERROR IS THAT T -i E PtR50NNEL ERROR PUMPS UOULD NOT HAVE AUT0t1ATICALLY RESTARTED FOLLOWING A POSTULATED E3 t,0NLIC. OPERATIONS PERSONNEL CONDITION ACCOMPANIED BY A LOSS OF POWER.
ITEM NOT APPLICABLE PERSCHNEL ERROR DURING SWITCHING AND TAGGING FOR MAltlTENANCE Gil THE A tiR WP STRAINERS. Oil DISCOVERY HRUP CORRECTLY SELEClED FGR ES ACTUATION. ALL OPERATING PERSONNEL WILL BE BRIEFED AND PROCEDURE CHANGED ADDING ES SEL ECTOR SWITCH POSITIONS TO SWITCllING ORDERS.
THREE M'LE ISL At4D-1 05000289 082078 t40RMAL OPERATIDH CONTRACTOR PERSONNEL LEAVING RX BLDG. ItitlER DOOR P E R S 0 tl Cit T HMN T ISOLATION 1.Y S + CONT 78-026/03L-0 091578 NEL ACCESS HATCH JAMMED OPEN.
REPORTABLE PER T.S.
6.9.2.B.(2),
DEGRADED PENETRATIONS,PRIMRY CONTAINMNT 022382 30-DAY MODE PER T.S.
3.6.1 AND
- 1. ? F. LEAK RATE ON OUTER DOOR SATISFACTORY. SIM PERSONNEL ACCESS ILAR PREVIOUS OCCURRENCE: LER 77-27 12/15/77.
I t{ N E R DOOR OPEN FOR REPAI COMPONENT FAILURE R LESS THAN 24 HRS.
NO TilREAT TO PUBLIC llE AL TH AND SAF ETY.
MECHANICAL CHICAGO 3 RIDGE & IRON COMPANY A CAM FAILED DUE TO WORN AtlD MIS ADJUSTED DRIVE TR Alti COMPONENTS. CAM UAS REPLACED AND THE MECHANISM READJUSTED.
THE CCMPLETE MECHANIST 1 IS TO BE REBUILT DURING THE 79 REFUELING OUTAGE.
THREE MIL E ISLAND-1 05000289 062E/8 ON AUGUST 22, 1978, A SAMPLE WAS TAKEN FROM THE TMI Ut4 I T 1 NEUTRALIZED W POTABLE + SAN LATEP SYS + CONT 78-020/04T-0 083178 ASTE TANK (NPDEl DISCHARGE #105) UHICit, WHEN ANALYZED, YIELDED A TOTAL 5 COMPONENT CODE NO. APPLICABLE 023265 2-WEEK USPENDED SOLIDS DISCHARGE OF 108.5 LBS./ DAY EXCEEDING THE EFFLUENT lit 1IT SUBCOMPONEt4T tt0T APPLICABLE OF 73.4 LBS./ DAY.
AS DEGREE OF KJtiC0t1PLIAt1CE IS NOT EXTREME AND POLLUT DEFECTIVE PROCEDURES ANT IS NOT T0XIC, NO SIGNIFICAt4T ENVIRONMEt4TAL DAt1 AGE EXPECTED.
NOT APPLILABLE ITEM NOT APPLICABLE PRESENT OPERATIttG PROCEDURE REQUIRES SAMPLING DURING DISCHARGE Or NEUTRA LIZED WASTE TANK FOR UNIT 1.
WHIL E DISCH ARGE il AS tiO T BEEtt SOURCE OF PEP Id EATED TSS VIOLATI0t45, THE PROCEDURE WILL BE ALTERED TO REQUIRE S r.MP L I N G 4~
AND ANALYSIS FOR TSS PRIOR TO FUTURE DISCHARGES.
OPERATOR ACTION CAN TH US BE TAKEtt TO AVOID RE0CCURRENCE.
U M
e
d APR 18, 79 LER CUTPUT ON EVENTS AT THREE MILE ISLAND 1 AtID 2 PAGE 61 FROM 1969 TO THE PRESENT GUTPUT SORTED EY FACILITY AtiD EVENT DATE FACILITY / SYSTEM /
COMPONEt4T/ COMPONENT SUBCODE/
DOCKET NO./ EVENT DATF/
CAUSE/CAUSE SUBCCDE/
LER fiO./
REPORT CATE/
E V E t4 T DFSCRIPTIP COMP 0t4ENT MANUFACTURER C 0 t4 T P O L NO. REPORT TYPE CAUSE DESCRIPTIO.
THREE MILE I SL At4D-1 05000289 090178 DURING TRANSMITTER CALIBRATION ACTUAL LEVEL OF 12.'2 FT. OF E0 RATED W'TE ENGNRD SAFETY FEATR INSTR SYS 78-027/01T-0 091578 R IN THE B C.F.T. WAS LESS THAN THE MIt4IrluM ALLCUABLE LEVEL OF 12.55 FT.
Itis T R UMEtiT A T IJti + CONTROLS 022381 2-WEEK THUS VIOLATING T.S.
3.3.1.2.A.
NO THREAT TO PUBLIC HEALTH AND SAFETY.
S E NS O R/ D E T EC T O R/ E L Ef1E t4 T OTHER NOT APPLICABLE BAILEY METER COMPANY A LEVEL TRANSMtTTER CALIBRATIOH WAS BEING CONDUCTED DUE TO DIFFERENT LEV ELS It4DICATED ON REDUNDANT C H AliN E L S. WH Ett IT WAS CETLRMINED THAT THE C0 RRECT C H A tih E L SHOMED THAT THE TANK WAS OUT OF SPECIFICATION, BOR ATtD WA T ER WAS ADDED TO BRIT 4G THE TANK TO WITHIN T.S.
LIMITS.
THREE MILE ISLAND-1 05000289 090878 NORMAL OPERATION CALIBRATING SODIUM HYDROXIDE T AtiK LEVEL T R A tist1I T T E R XMT OTHER ENGNRD SAFETY FEATR SYS 78-028/01T-0 092278 R IN REFUELING INTERVAL SURVEILLANCE. T AliK CONTAlt4ED 17,215 LB. 50DILl1 H INSTRU'1ENTAT'1N + C0hTROLS 022380 2-WEEK YDROXIDE IN VIOLATIDH OF T.S.
3.3.1.3B. (1 A X ALLOUABLE 17,000 LB. EXCESS TR At4Sf1I T T Er 215 LB. WOULD HAVE RAISED PH OF RX BLDG. SFRAY SOLUTION SLIGHTLY IF SPRA C0!!P ON EN T FAILURE Y REQUIRLD TO MITIGATE A LOCA. NO THREAT TO PUBLIC HEALTH AND SAFETY.
INSTRUMENT 3AILEY METER CCMPAi LEAKY 0-KINGS ALLOWED WATER TO PASS TO DRY SIDE OF XMTR, REDUCED DELTA P CALIBRATION DRIFT RESULTED IN LOW XM.R READING.
0-R i tiGS REPLACED AND XMTR RECALIBRATED. T At4K LEVEL RETURNED TO SPEC IN 1 HR. PROPER X;1TR OPER AT20N. SURV. PROC. TO BE REVISED TO CL E Ari Xt11R AND REPLACE 0-RIt4GS ON RE FUELING INTERVAL.
THREE MILE ISLAND-1 05000289 091478 DURING SURVEIL L AtiCE T ESTING. A TEMPERATURE SENSOR FOR THE "A" EMERGENCY FIRE PROTECTICN SYS + CONT 78-029/01T-0 092878 DIESEL GENERATOR R00t1 WAS FOUt4D TO BE INOPERABLE.
IN VIOLATION OF T.S.
COMPONENT CODE t40 T APPLICABLE 022379 2-WEEK 3.18.1, A FIRE UATCH WAS NOT cSTABLISHED WITHIN ONE HOUR, AND THIS IS RE SUBCOMPONENT NOT APPLICABLE PORTABLE PER T.S.
6.9.2.A.(2).
PERSONNEL ERROR LICENSED 2 SENIOR OPERATORS ITEM NOT APPLICABLE PERS0t;NEL ERROR. CONTINUOUS FIRE MATCH ESTABLISHED ON DETERMINATION OF V 10L A T I0tl.
PROCEDURAL GUIDANCE PROVIDED IN ALMINISTRATIVE PROCEDURE AP 1 001 TO PREVENT RECURRENCE.
REQUIREt1ENTS OF FIRE PROTECTION T.S.
TO DE R EVIEWED BY SHIFT SUPERVISORS, FOREMEN AND GPERATORS.
THREE MILE ISLAND-1 05000289 092378 DURING NORMAL OPERATIONS, WHILE CHECKING FOR THE CAUSE OF A f1ISCELLANEOU LIO RADICACT WSTE MANACMNT SYS 78-030/03L-0 102078 S EVAPORATOR HEATER BREAKER TRIP, E0 RATED WATER WAS F 0utiD I ti THE HEATER HEATERS. ELECTRIC 022654 30-DAY TERMINAL BOX, REPORTABLE PER T.S.
6.9.2.B(4).
76-27 A SUBCOMPCNENT NOT APPLICABLE 14 D 7 7 - 19.
LEAKAGE WAS CONFINED TO TEKMINAL BOX AND CONDUIT, THUS THE EV COMPONENT FAILURE Et4T POSED NO THRFAT TO THE PUBLIC'S HEALTH At4D SAFETY.
E' ECTRIC AL C H R C r1 A L O X CRUD BUILDUP IN EVAPORATOR TANK CAUSED A HOT SPOT TO DEVELOP IN THE HEAT ER E L Ft1E N T, WHICh LED TO EL E!!Et4 T CLADDING RUPTURE.
TANK UAS CL E AtiED, EL Et1EN T REPLACED, At4D EVAPORATOR RETURNED TO SERVICE.
FREGUENCY OF EVAPOR I
ATOR TANK CLEANING WILL BE INCREASED TO MINIMIZE CRUD BUILDUP.
w n
'A
PAGE 62 LER OUTPUT Oti EVEt4TS AT THREE MILE ISL At4D 1 AND 2 PR 18, 1979 FRCM 1969 TO THE P2ESEtiT GUTFUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C 0!1P 0 t4 E N T / CCMP ON Jt4 T SUBCODE/
DOCKET t40. / EVENT DATE/
EVENT DESCRTPTIGN/
CAUSE/CAUSE SU: CODE /
LER HO./
RLPORI DATE/
CAUSE DESCRIPTI0t4 COMPONEt4T T1 AtiUF ACTURER CONTROL NO. REPORT TYPE HREE MILE ISLAND-1 05000289 100578 ON 10/5/78 PH UF THE INnUSTRIAL WASTE FILTER SYSTEtt DISCHARGE WAS 11.7 E POTABLE + S A ti LATER SYS + CONT 78-022/04T-0 101773 XCEEDING ETS RANGE lit 1IT OF 6.0-9.0.
PART CF THE NEUTRlLI2ER TANK DISCH C OMP ON Et4 T CODE t40T APPLICABLE 023264 2-WEEK ARGE REOUIRING ADDITI0tlAL TSS lREATMENT WAS ROUTED INSTEAD TD WATER TRE TtENT SUMP WHERt PH WAS ItiCRE ASED BEFORE RET URt4It4G TO IWFS.
PN MC:4IT ORS IN THE IWFS MALFut4CTIONED A"D DIDtt'T liALT IWFS DISCHARGE.
DUTY PERSat4N S U 8 C 0t1P 0t4 E t4 T tt0 T APPLICABLE PERSONNEL ERROR EL TOOK SAMPLE AND FOUt4D HIGH Pil.
NDHLIC. OP ER AT IONS PERS0titlEL OPERATOR FAILED TO FOLLOW DRAINING PROCEDURE COPRECTLY.
EMPHASIS CN STR ITEM NOT APPLICABLE ICT ADHEREt4CE TO OPERATOR PROCEDURES WILL EE I ti C R E A S E D.FH MONITCR WILL BE CHECKED MORE OFTEN TO Et4SURE PROPER OPERATION.
THREE MILE ISLAND-1 05000239 102678 ON 10/26/78, AN INDUSTRIAL WASTE FILTER SYSTEf1 DISCHARGE StMPLE IIAD PH 0 P01ABLE + S Ati LATER SYS + CONT 78-023/04T-0 110678 F
9.4.
EXCEEDIt:G NPDES DISCHARGE 104 PERMIT L If1I T RANGE OF PH 6.0 -
9.0.
INSTRUMENTATION + C 0t4 T R O L S 0232/6 2-WEEK ESTIMATED THAT tio MORE THAN 6000 G A'. LONS WERE DISCH ARGE; BEFORE EFFLUE NT RELEASE WAS TERMIt4ATED.
BECAUSE PH VIOLATION WAS NOT EXTREf1E AND DIS SE!4SOR/ DETECTOR / ELEMENT CHARGE WAS QUICKLY HALTED, HO SIGt4IFICAt4T ENVIRON!!EtiT AL If1P ACT EXPECTED.
COMPONENT FAILURE I N S T R U M E ti T PH INSTRUMENTATION WAS OUT OF SERVICE FCR CALIERATION CHECK A SAMPLE O IT EM tiOT APPLICABLE F FILTRATE TANK EFFLUENT INDICATED HICH FH.
DISCHARGE WAS I!:MLDIATELY H ALTED.
MORE FREQUENT CALIERATION CHECKS INSTITUTED.
B Act:-UP f*0NITORS W ILL BE USED iti FUTURE WHET 4 M Alti PH fl0NITCRS ARE OUT OF SERVICE.
THREE MILE ISLAND-1 05000289 112076 ON ff/20/78 A SAMPLE OF INDUSTRIAL WASTE FILTER SYSTEM OISCHARGE HAD A 9 POTABLE + SAN LATER SYS + CONT 18-025/06L-0 121478 11 PH, EXCEEDING THE NPDES DISCHARGE 104 L It1I T OF 9.0 AS DECREE OF tiO C OMP O N E t4 T CODE 140 T APPLICABLE 023275 30-DAY N-COMPLIAt4CE NOT EXTREME, 14 0 SIGNIFluANT EtiVIRONMEtiT A L IMPACT EXPECTFD.
SUCC0f1PONENT NU' A'PLICABLE OTHER NOT APPLICABLE MODIFICATIONS TO PH CONTROL SYSTEM ARE NOT COMPL ETED AND l1IGHT HAVE CAUS ITEM tiOT APPLICABLE ED EVEtlT.
PROBLFt15 WITH ORIGINAL DESIGN ARE PEItiG CORPECTED.
REMAINIH G WOPK OH PH INSTRUf1ENTATION AND ACID FEED PUMPS SHOULD BE CCMoLETED IN 3 WEEKS.
THREE MIL E ISL AtlD-1 05000289 120478 DURING tt0RMAL STATION OPEMATIDH, AMEIENT ENVIR0t"1EtiT AL CONDITIONS CAUSED
+ CON 78-031/04T-0 121578 STATION RIVER WATER DISCHARGE DELTA TEMPERATURE LIniT OF 12 DLGREES F.
Cor1PCNENT CUDE t4 0 T APPLICABLE 023263 2-WE -
TO BE EXCEEDED BY 2 DEGREES F. FOR 2.5 HOURS, VICLATING Ti11-1 (TS 2.1.B.
CIRCULATING WATER SYS S U B C O MP 0 ti E ti T NOT APPLICABLE
- 1) AND TMI-2 (ETS 3.1.1.A(1)).
NO THREAT TO FUBLIC HEALTH AND SAFETY.
REPETITIVE:
SEE 77-20, 77-05, 77-02, 76-28, 76-09, 78-03, 77-07, 74-03, EXTERNAL CAUSE 74-01.
NOT APPLICABLE EVENT WAS CAUSFD BY HIGH RELATIVE HUMIDITY AND AMBIENT AIP TEMPERATURE I ITEtt NOT APPLICABLE N CCt!B IN A T ION 5.IT H LCW AMBIENT RIVER TEM?ERATURE WHICH C;USED A HEATING, N
RATHER THAN COOLING, OF THE STATICt4 RIVER DISCHARGE LY THE TIECH/.HICAL D RAFT COOLING TOWERS (MDCT).
TO MINIMIZE THIS EFFECT, MDCT'S WERE SHUT D gx OWN.
~
's M 4
APR 18, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE'63 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C O MP 0 t4 E ti T / C OMP O N E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMP 0t4Et4T MANUFACTURER CONTROL tiO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-1 05000289 010779 WHILE PERFORMING ISI TESTING ON DECAY HEAT RIVER WATER PUM? 1A THE VIERA RESIDUAL HEAT REMOV SYS + CONT 79-001/03L-0 013079 TION LEVEL WAS FOUND TO BE WITHIti REQUIRED ACTION RANGE PER ASME SECTI0tt PUMPS 025003 30-DAY XI, AtID DRP-1A WAS DECLARED INOPERABfE, CONSTITUTIllG CPERATI0ti IN A DEG AXIAL RADED MODE PERf1ITTED BY T.S.
3.3.2.
REDUNDAt4T PUMP DR-P1B WAS OPERABLE COMPONENT FAILURE At4D THIS EVENT HAD NO EFFECT Ott PODLIC HEALTH AND SAFETY.
I.S.
6.9.2.B(2).
PEERLESS PUMP CD VIBR ATION WAS APP AREt'TLY DUE TO UNB AL At4CE CAUSED BY A RAG IN THE PLMP SU CTION FURTHER PERTUREED BY WEAR OF SHAFT SLEEVES.
PUMP AtID MOTOR UERE R EPLACED AND VERIFIED OPERABLE WITHIH 72-HOUR T.S.
RE?UIREMENT.
NEW ISI REFEREt4CE DATA WAS ESTABLISHED PER ASME SECTION XI R E Q U I R EM Et4 T S.
THREE MILE ISLAND-2 05000320 092872 STEEL INNER TIE PLATE WEIGHING 400 POUNDS AtiD USED TO rASTEN SHIPPING CD REACTOR VESSEL I t4 T ER.4 A L S 72 02L 102572 VER TO TOP OF PRESSURE VESSEL, FELL INTO VESSEL SCRATCHItiG ONE INCORE IN OTHER CCMPONENTS 002373 30-DAY STRUMENTATTuk N0ZZLE.
S U B C O MP 0 tie N T f40T APPLICABLE PERSONNEL ERROR CAUSE buBCODE NOT PROVIDED tio MANUFACTURER SPECIFIED PLATE NOT PROPERLY SECURED TO SHIPPING COVER.
THREE MILE ISLAND-2 05000320 061473 AFTER COMPLETING SdVEN POURS OF SERVICE BUILDING CCt4 CRETE IT WAS FoutlD I OTHER SYSTEMS 73 02L 071873 HAT PRE-PLACEMEhT OR POUR INSPECTIONS HAD NOT BEEN COMPLLTED.
OTHER C 0t1P O N E ti T S 001197 30-DAY SUBCOMPONENT NOT APPLICABLE DEFECTIVE PROCEDURES CaUSE SUBCODE tiOT PROVIDED NO MAtiUF AC T URER SPECIFIED INADEQUATE Q-A-QC PROGRAM.
THREE MILE ISLAND-2 05030320 072975 DURING INSPECTION OF THE CONTROL BUILDING IT WAS FOUND THAT AT ELEVATI0t1 SYSTEM CODE NOT APPLICABLE 75 02X 082875 331.5 FEET A VERTICAL MECHANICAL AND ELECTRICAL CHASE WAS BOUNDED DY 70 C 0t1P O N E N T CODE NOT APPtICABLE 013185 OTHER 0 SQ FEET OF WALL C0tiSISTING OF 8 INCH AND 6 INCH HOLLCW BLOCKS. THESE C SUBCOMPONENT NOT APPLICABLE ONCRETE BLOCK WALLS WERE tiOT DESIGNED T0 ttEET SEISMIC LOADING CONDITI0 tis DFSIGN/ FABRICATION ERROR CAUSE SUDCODE NOT PROVIDED ITEM tiOT APPLICABLE rd CONSTRUCTION ERROR. CONCRETE BLOCK WALLS WERE REMOVED AND REPLACED WITH STRUCTURAL STEEL AND A Q-DECK TYPE PANELING.
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APR 18, 1979 LER OUTPUT ON EVEtiTS AT THREE MILE ISLAND 1 AND 2 PAGE'65 FROM 1969 TO THE PRESET 4T OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMP 0tlENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUCC0DE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 092177 SEVER AL GE TYPE SBM SWITCliES WERE FOUND TO llAVE FAILED DURING TESTItiG.
OTHER SYSTEMS 77 02L 102177 CIRCUIT CLOSERS / INTERRUPTER'_
019441 30-DAY NG SUBCOMPONEt4T PROVIDED COMPONENT FAILURE CAUSE SUBCODE t40T PROVIDED ITEM NOT APPLICABLE FAILURES WERE DJE TO CRACKS 1 BREAKS IN CAtt FOLLOWERS. GE NOTIFIED OF P ROBLEM.
PEPLACEMENT SWITCHES ORDERED.
THREE MILE ISLAND-2 05000320 020878 DURING INITIAL FUEL L O A D I14 G, A SURVEILLANCE (REQUIRED BY T.S.
4.9.9, AND GAS RADI0ACT WSTE MANAGMNT SYS 78-001/03L-0 022878 4.3.3.1 TABLE 4.3.3 ITEM 2.B.I.A AND 2.B. IIA) INDICATED THAT THE REACIO COMPONENT CODE t4OT APPLICABLE 020993 30-DAY R BUILDItiG F URGE SUPPLY FAtiS AND ASSCCIATED PURGE RECIRCULATION DAMPER S SU B C OMP O N Eti T NOT APPLICABLE YSTEM, UERE INOPERABLE.
THIS EVENT PRODUCED fl0 EFFEC 1 ON THE HEALTH At4 D DESIGN /FACRICATION ERROR SAFETY OF THE TU2iIC.
CONSTRUCIION/ INSTALLATION ITLM NOT APPLICABLE ItiCOMPL ET E CONSTRUCTI0tl.
REACTOR BUILDING PURGE fat!S AND DAttPERS COULD NOT BE DEMONSTRATED OPERABLE.
DO NOT OPERATE TAGS UERL PLACED ON CONTAI NMENT PURGE AND EXHAUST VALVE 3.
AF T ER COMPL ETI0tl 0F CONSTRUCTIDH SURVEI LLANCE TESTItiG WILL BE RUN.
UNTIL THEN C0tiTAINMENT PURGE VALVES AliD EXH AUST pet 4ETRATI0 tis MILL REMAIN CLOSED.
THREE MILE ISL AtiD-2 05000320 020878 PRIOR TO INITIAL FUEL LOADING, A VENDOR INSPECTION REVEALED A MANUFACTU-OTHR I tis T SYS REQD FOR SAFETY 78-002/03L-0 022878 RER'S DEFECT Ill PLATE 6 0F THE SEISt11C It4S T RUMENT AT I0ti TRIAXIAL R E S F 0t4 S E INS T RUf1EtiT A T ION + C 0ll T R o t s 020999 30-DAY SPECTRUM RECORDER 714, THUS VIOLATING THE SURVEILLAtlCE REQUIRLMEllTS OF RECORDER T.S.
4.3.3.3.2 TABLE 3.3.7, ITEM 4.A.
THIS EVEN1 PRODUCED tio EFFECT ON DESIGil/ F ABRIC A TION ERROR THE HEALTH AND WELFARE OF 1HE PUBLIC.
MANUFACTURIN3 ITLt1 NOT APPLICABLE TifIS EVENT OCCURRED DUE TO A MANUFACTUkER'S r,EFECT.
A REPLACE!1ENT SET 0 F PLATES HAS BEEN ORDEkED AND, UPON arf:IVAL, WILL BE ItiSTALLED AND THE R ECORDER VERIFIED OIERABLE.
THREE MILE ISL AtiD-2 05000320 020973 ON FEBRUARY 9 A t3 D 10, 1978 SAMPLES TAKEN FROM THDUSTRIAL UASTE FILTER SY OTHER AUX UATER SYS + CONTR0ls 78-001/u4X-0 031378 STEM (IWFS) SUMP INDICATED LEVELS OF TSS AND PH OF 476 MG/L, 9.5 AND 297 COMPONEt4T CODE NOT APPLICABLE 021237 OTHER MG/L, 9.66, RESPECTIVELY.
THESE EXCEEDED NPDES PERT 11TS LIMITATIONS OF 1 SUBC0tiPONENT NOT APPLI"ABLE 00 MG/L TSS (TOTAL SUSPENDED SOLIDS) AND A PH RANGE OF 6.0 TO 9.0.
OTHER NOT APPLICABLE ITEM t10f APPLICABLE Id SUMP PUMP WAS RAISED TO INCREASE SETTLING CAPACITY Iti SUMP UNTIL IT COUL 42-D BE PUMPED CLEAN.
SUMP WAS CLEANED 2/13/78.
A flEU I t4 T ER IM T R E A TMEtlT S YSTEM TO BE IN3TALLED IS EXPECTED TO PROVIDE PH ADJUSIMEtiT FOR WASTEUATE R FRCM IWFS SUMP.
(,a
APR 18, 1979 LER OUTPUT ON EV Et4 T S AT THREE MILE ISLAND 1 AND 2 PAGE 66 F R O:1 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVEllT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER t10./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MANUFACTURER C 0 tlT R O L NO. REPORT 1YPE CAUSE DESCRIPTION TitREE MILE ISLAND-2 05000320 021378 WHILE IN MODE #6 IT BECAME EVIDENT T il A T A C0tiTINUQUS FIRE WATCil (AS REQU FIRE PROTECTION SYS + CONT 78-003/01T-0 022778 IRED BY T.S.
3.7.10.3) WAS NOT ESTABLISHED, WHEN THE CABLE ROOM HAL0tl SY C OMP 0 t1 E t4 T CODE NOT APPLICABLE 023077 2-WEEK STEM'S AUTOMATIC ACTUATI0tt FEATURE WAS REtiDERED INOPERABLE TO ALLOW CONS SUBCor:P014EN T tiO T APPL IC ABL E TRUCTION WELDING.
THIS EVEt4T PRODUCED NO EFFECT Oil THE HEALTH AND SAFET PERSONNEL ERROR Y OF THE PUBLIC.
LICENSED & SENIOR OPERATORS I T Ef1 N O T APPLICABLE MISINTERPRETATION BY PORC AND SHIFT SUPER"1$0R.
ASSUMED HALON SYSTEM OP ERABLE BUT AUT0t1ATIC ACTUATION FEATURE WAS DE-EttERGIZED.
THUS FIRE WATC 11 NOT ESTABLISHED WilILE AUTOMATIC ACTUATION DEFEATED.
SYSTEM REENEEGIZE D.
PERSONNEL INSTRUCTED.
THREE MILE ISLAND-2 05000320 021478 AFTER INIlIAL FUELING DISCOVERED 2 FUEL ASSEMELIES WERE 10ADED INTO THE OTHR INST SYS NOT REQD FR SFTY 78-004/01T-0 022778 REACTOR VESSEL WITil0UT HAVING SOURCE R ANGE AUDIBL E COUNTS In THE CONT l,Itl INSTRUMEttTATION + CONTROLS 025078 2-WEEK MENT BUILDING AS REQUIRED BY T.S.
3.9.2.
BOTH VISUAL AND IUDICLE COUNTS S E tis O R / D E T E C T O R/ E L EM E N T OBSERVED IN CONTROL ROOM At4D C0tiTROL ROOM PERSONNEL IN COMMUNICATI0tl WI PERS3NNEL ERROR Til PERSONNEL IN REACTOR BUILDING. NO EFFECT ON PUBLIC HEALTH AtlD SAFETY.
LICENSED & SENIOR OPERATORS ITEM NOT APPLICABLE AUX IN-CORE NEUTRON DETECTORS REMOVED TO LOAD F Ill A L 2 FUEL ASSEM3 LIES.
THESE PROVIDED AUDIBLE COUNT RATE INDICATION INSIDE CONTAINt1ENT.
SIriCE AUDIBLE COUNT RATE INDICATION IN REACTOR B U I L D I t4 G IS REGUIRED AT ALL TIM ES IN MODE #6, AUDIBLE INDICATION PROVIDED BY PERr1ANENTLY INSTALLED OUT-0F-CORE DETECTORS.
T'REE MILE ISLAND-2 05000320 021678 DukING SURVEILLANCE TESTING THE REVERSE POWER RELAY ACTUATED CAUSIt4G DIE EMERG GENERATOR SYS + CONTROLS 78-007/03L-0 031678 SEL GEt1ERATOR DF-X-1B TO TRIP.
Il0 ADVERSE EFFECT ON THE ilEALTH AND SAFE INSTRUMENTATION + CONTROLS 021000 30-DAY TY OF TiiE PUBLIC COULD HAVE RESULTED DECAUSE THE REVERSE POWER RELAY IS SWITCH BYPASSED DURING EMERGENCY OPER ATING T10DE At4D DIESEL GENERATOR DF-X-1A AS COMP 0HLNT FAILURE REQUIRED WHILE Ill MODES S AND 6 UAS OPERABLE.
INSTRUMENT ITEM NOT APPLICABLE THE PROBABLE CAUSE OF THE REVERSE POWER RELAY ACTUATION WAS A SPURIOUS A CTUATIDH OF THE RELAY.
THE RELAY WAS RESET AND THE SURVEILLANCE TEST ON THE DIESEL GENERATOR WAS RERUN AND SUCCESSFULLY COMPLETED.
NO FURTHER CORRECTIVE ACTI0ti IS REQUIRED.
THREE Mitt ISLAND-2 05000320 021778 AFTER INITIAL FUFLING IT WAS DETERt11NED THAT CORE AtTE[ RATIONS, INSERTIO REACTOR VESSEL I tl T ER N A L S 78-006/0tT-0 030278 N OF IllCORE DETECTORS, HAD BEEti MADE WHEN CON T AINr1EN T IllTEGRITY HAD BEEN Itis T RUMEt4T A T ION + CONTROLS 020986 2-WEEK B R 0" Eli AND WHILE DIRECT COMMUNICATI0tl5 WITH Tile CONTROL ROOM WERE NOT M SENSOR / DETECTOR / ELEMENT AINTAINED.
SINCE THE FUEL WAS UNIRRADIATED AND NO ACTIVITY WAS RELEASED DEFECTIVE PROCEDURES THERE WAS NO ADVERSE EFFECT TO THE HEALTH AND SAFETY OF THE PUBLIC.
It0 T APPLICABLE ITEM t10T APPLICABLE py E^
VOLUTI0tl FELL WITilIN THE DEFItilTI0tl 0F CORE ALTERATIONS.
TO P R E V E t4 T FUT URE RECURRENCE, SitI F T P E R 50 tit 4 E L It4STRUCTED THAT INCORE MOVEMEtiTS CONSTIT tN UTE CORE ALTERATIONS.
FUELING PROCEDURES WILL BE MODIFIED.
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 At4D 2 PAGE 67 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C 0f1P O N E N T / C UMP 0 t1 E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
AEPORT DATE/
EVENT DESCRIPTION /
C0f1PONENT MANUFACTURER C0tiTROL NO. REPORT TYPE CAUSE DESCRIPTIOri THREE MILE ISLAND-2 05000320 022478 DURING MODE S.
WHILE PERFORMING FINAL TURNOVER INSPECTI0i4S, IT WAS DETER FIRE PROTECTIOt1 SYS + CONT 78-008/03L-0 032578 MINED THAT THREE FIRE PENETRATION SEALS WERE t10T FUNCT I0t4 AL, PER T.S.
3.
PEilETRATIONS PRIMRY CON!aINMNT 021001 30-DAY 7.11.
BECAUSE THERE WAS NO FIRE AT THE TIME, AttD BECAUSE A FIRE WATCli W E L E C T R I C A '.
AS If1 MEDIATELY POSTED, THIS EVENT PRODUCED fl0 ADVERSE IliPACT ON THE HEAL DESIGN /FALRICATION ERROR Til AND SAFETY OF THE PUBLIC.
CONSTRUCIION/IllsTAlLATION ITEM t10T APPLICABLE SEALS WERE BREACHED DURING COMPLETION OF CONSTRUCTION.
FIRE WATCil WAS P OSTED AND SEALS RETURNED TO FUNCTIONAL STATUS.
CONSTRUCTI0ti PERSONNEL H AVE BEEN INSTRUCTED AS TO THE NEED TO COMPLY WITH THE R E Q U I P 5f1 Lit T S OF TE CH SPEC RELATIVE TO FIRE BARRIER SEALS.
THREE MILE ISLAND-2 05000320 L30278 DURING PRE-OP TESTING OF C0tiTROL ROD DRIVE t1ECHANISMS ROD DRIVE TRIP BRE REACTIVIT( CONTROL SYSTEMS 78-009/03L-0 031678 AKERS WERE CLOSED AND CONTROL RODS WITHDRAWN FUR PRE-OP TESTING PRIOR T CONTROL ROD DRIVE MECHANISMS 021002 30-DAY 0 PERFORMANCE OF CRD TRIP BREAKER FUNCTIONAL TEST.
THIS EVENT OCCURRED SUBCOMPONEtlT NOT APPLICABLE WHEN REACTOR C00LAtlT B O R 0 ti CONCEtiTRATION WAS IN EXCESS OF 2,000 PPM AND PERSONNEL ERROR PRODUCED NO ADVERSE EFFECT ON PUBLIC HEALTH AND StFETY.
LICEllSED & SEtlIOR OPERATORS I T Ef1 fl0 T APPLICABLE IT WAS NOT REALIZED THAT WHEN CRD BREAKERS CLOSED SU2 MODE STATE HAD BEET 1 ENTERED WITiiLUT ALL SURVEILLANCE REQUIREMENTS HAVING BEEN SATISFIED. CR D BREAKERS WERE OPENED, AND ALL SURVEILLANCF REQUIREMENTS WERE SATISFIED BEFORE PROCEEDING.
THREE MILE IS L AtiD-2 05000320 030378 ON MARCH 1,
1978. STATI0fi PERSONtlEl WORKED IN THE INDUSTRIAL WASTE TREAT OTHER AUX WATER SYS + CONTROLS 78-002/04T-0 030878 NENT SYSTEM (IWTS) SUf1P TO REf10VE PLUGGED IHLET STRAINERS Ott BOTH WASTm C0f1PONENT CODE t40T APPLICABLE 021288 2-WEEK INFLUENT FEED PUf1PS AND TO CLEAN DEBRIS FR0f1 THE WASTE I N F L U EtiT FEED PUf1 SUSCOMPONENT NOT APPLICABLE P SUCTION PIT.
AS SAFETY PRECAUTION FOR WORKERS All Ef1ERGENCY BACKUP PUM PERSONNEL ERROR P WAS TEMPORARILY INSTALLED I ti THE SUMP.
ON MARCH 2, 1978, Ati OPERATION OTHER AL CHECK OF THE IWTS SUMP FOUND THE EMERGENCY BACKUP PUMP R U tin I N G.
APPR ITEM tiOT APPLICABLE OXIMATELY 60,000 GALLONS OF WATER WAS f1ISTAKENLY DISCllARGED TO RIVER.
THE E!1ERGEtiCY PUMP WAS STOPPED AND ret 10VED FROM TiiE CUl1P.
THREE MILE ISLAND-2 05000320 030778 CONTRARY TO TECHNICAL SPECIFICATI0tl 4.0.5 WHICH ItiV0KES ASME SECT P < XI REAC COOL CLEANUP SYS + CONT 78-010/03L-0 040478 T ES T IllG FOR CODE CLASS 1,
2.
AND 3 PUMPS AND VALVES, THE RIVER Wr..JR PUM VALVES 021003 30-DAY P OUTLE! AND PRELUBE VALVES, AND THE REDUNDANT RCP SEAL I N J EC T I 0t{ VALVES O'HER HAD NOT BEEN FUtlCTIONALLY TESTED BEFORE TilEIR RESPECTIVE SYSTEf15 H AD BE DEFECTIVE PROCEDURES EN PLACED IN SERVICE.
t40 T APPLICABLE I T Ef1 h0 T APPL IC ABL E FPELUBE AND REDUNDANT SEAL INJECTIOtl VALVES WERE tlEWLY IDENTIFIED AS BEI N
tlG WITHIH ISI SCOPE HAVING BEEN ADDED BY DESIGN CHANGES.
RIVER WATER FU J:s MP OUILET VALVES NOT INCLUDED IN ORIGINAL ISI SUBMISSION DUE TO f1ISIlllER PRETATION OF THEIR OPERATION.
THESE VALVES HAVE BEEtt INCORPORATED INTO ISI PROCEDURES AND TESTED q,4
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAt1D 1 AND 2 PAGE 68 FROT1 1969 TO THE PRESET 4T GUTPUT SOPTED B( FACILITY AND EVENT ;) A T E FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ E V E ti T DATE/
CAUSE/CAUSE SUCCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTIUN/
COMPONEt4T MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 031178 T.S.
3.6.1.3 VIOLATED.
ENTERED MODE 4 WITHOUT PROPERLY ESTABLISiiING C0li C N i tiMN T ISOLATION S(5 + CONT 78-011/03L-0 040778 TAINMENT INTEGRITY.
SURVEILLAt4CE Ott R.B.
DOOR SEAL 5 tt0T PERFORMED WITHI PENETRATIONd,PRIMRf CON T AlliMNT 021004 3u-DAY N PREVIOUS 72 HOURS.
A11 CONTAINMENT AIR LOCK DOORS WERE If1:1LDI AT ELY TE PERSONNEL ACCESS STED.
R.B.
P E R S 0 tit 1 E L HATCH INNER DOOR FAILED TO MEET LEAKAGE ACCEPTAt4CE DEFECTIVE PROCEDURES CRITERIA.
SINCE UNIT HAD NOT YET GONE CRITICAL ti0 EFFECT O t{ HEALTH AND NOT APPLICABLE SAFETY OF PUBLIC.
PITTSBURGH-DES MOINES STEEL C0 SURVEILLANCE PROCEDURE I4OT SPECIFIC ENOUGH TO IDENTIFY THAT R.B.
DOCR SE AL LEAKAGE TEST flUST BE MET TO BOTH ESTABLISH AND MAIHTAIN C0t4TAINMENT I HTEGRITY.
INNER DOOR FAILED DUE TO DAtiAGED 0 RING SEALS.
THE 0 RING WA S REPLACED AND It4NER DOOR RETESTED SATISFACTORILY.
PROCEDURES WERE CHAll GED TO CLARIFY TESTING REQUIREMENTS.
THREE MILE ISLAND-2 05000320 031478 ENTERED MODE 4 WITH OtiLY ONE OPERABLE BUILDING SPRAY SYSTET) SINCE SURVEI C N T iiMN T HEAT REMOV SYS + CONT 78-012/03L-0 041078 LLANCE ON BUILDING SPR AY PUTIP 1A WAS NOT CURRENT WITHIti THE LIf1IT S OF TE PUMPS J21005 30-DAY CH SPEC 4.0.2.A.
4.0.2.B AND 4.6.2.1.B.
PUTIP 1A WAS PREVIOUSLY TESTED s OTHER ATISFACTORILY AND WAS AGAIN TESTED SATISFACTPRILY FOLLOWING THIS EVENT.
PERSONNEL ERROR NO EFFECT O t1 THE HEALTH AND SAFETY OF THE PUBLIC.
LICENSED & SENIOR OPERATORS ITEM t40T APPLICABLE CLERICAL ERROR.
DATE WHICH MUST BE USED TO DETERMINE IF A SURVEILLAt4CE IS CURRENT IS THE EARLIEST DATA DATE At4D NOT THE DATE THE SURVEILLAtiCE W AS COT 1PLETED.
THE DATE SURVEILLANCE WAS C0t1PLETED WAS RECORDE9 ON l HE f1 ODE 4 CHECKLIST.
OPERATIONS PERS0t4NEL WILL BE REIt4STRUCTED.
THREF MILE ISLAt4D-2 05000300 031578 B DIESEL GEN TAGCED OUT OF SERVICE 1445 FOR MAINTEt4At;CE.
REDUNDANT DIES EMERG GENERATOR SYS + C 0 t1T R O L S 78-013/01T-0 032778 EL G E tt NOT DEM0tiSTRATED OPERABLE UNTIL 1805.
ADDITI0t4 ALLY BREAKER ALIGN Et1 GIN ES, It4T Lc N AL COMBUSTION 021006
'-WEEK MENT REQUIRED BY TECH SPEC 4.8.1.1,1.A NOT PERFORMED UNTIL 1805.
NO EFF S U B C 0t1P O N E ti T NOT APPLICABLE ECT ON HEALTH AND SAFETY OF PUBLIC.
PERSONNEL ERROR CONSTRUCTION PERSONNEL ITLM r10T APPLICABLE IN AJEQU ATE REVIEW OF TECH SPEC 3.8.1.1.B AND ASSOCI ATED ACTION ST ATEMENT iUCCESSFULLY TESTED REDUNDANT DIESEL GENERATOR AND VERIFIED EREAKER A LIGNMENT I ti ACCORDANCE WITH TECH SPEC.
PERSONNEL WILL BE I tis T R U C T E D.
HREE MILE ISLAND-2 05000320 031578 WHILE THE UNIT WAS IN MODE 3 AND THE SURVEILLANCE REQ"IREMENTS OF T.S.
4 CHINMNT ISOLATION SYS + C 0rt T 78-014/03L-0 041278
. 6.1. 3 WERE B EItiG PERFORf1ED, THE INNER D0OR SEALS ON BOTH AIRLOCKS FAILE PENETRATIONS,PRIMRY CONTAINMNT 021280 30-DAY D.
AT LEAST Ot4E DOOR C t1 EACH AIRLOCK WAS MAIt4TAINED CLOSED PER THE ACTI PLRSONt4EL ACCESS Ori ST AT EMET 4T OF T.S.
3.6.1.3.
SIliCE THE UNIT HAD NOT YET GCHE CRITIC AL,
COMPONENT FAILURE THERE WAS tl0 EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC.
MECHAtiICAL PITTSBURGH-DES MOINES STEEL CD THE INNER DOORS DID NOT SEAT WIT;l A CLOSE ENCUGH T O L E R A tic E.
TH E Ut'IT W A N
S PLACED IN COL D SHUTDOWN WITHIH 30 HOURS FOR OTHER REQUIRED MAINTENANCE
- w WHILE IN COLD SHUTDOWti, BOTH INNER DOORS WERE ADJUSTED TO PROVIDE A C LOSER FIT AND RETESTED AS SATISFACTCRY.
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APR 18, 1979 LER OUTPUT ON EVENTS AT iHREE MILE ISLAND 1 AND 2 PAGE 72 FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DAi CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DA.
EVENT DESCRIPTION /
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPL CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 042378 IN MODE 1 REACTOR TRIPPED FROM 3 0 *. R.T.P.
RCS RAPIDLY COOLED DCWN AND D MAIN STEAM SYSTEMS + CONT' 1LS 78-033/0tT-0 050878 EPRESSURIZED.
DURING DEPRESSURIZATION, SAFETY INJECTION WAS INITIATED.
VALVES 021273 2-WEEK RCS AND PRESSURIZER COOLDOWN RATES WERE EXCEEDED (T.S.
3.4.9.1 AND 3.4.
OTHER 9.2).
PRESSURIZER VOL BELOW LIMITS OF T.S.
3.4.4).
CALCULATIONS AND RA DESIGN / FABRICATION ERROR DI0 CHEMISTRY SHOW THAT CORE REMAINED COVERED AT ALL TIMES AND HO RELEASE CONSIRUCTION/ INSTALLATION OF RADI0 ACTIVE MATERIAL RESULTED.
ITLM NOT APPLICABLE FOLLOWING RX TRIP, MAIN STEAM RELIEF VALVES DID NOT RESEAT AT CORRECT PR ESSURE.
FEEDWATER SYSTEM RESPONSE SLOW SINCE INIIIAL INTEGRATED CONTROL SYSTEM TESTING STILL IN PROGRESS.
COMBINATION OF RELIEF VALVES FAILING TO RESEAT AND CONTINUING TO FEED STEAM GENERATORS RESULTED IN RAPID DEP RESSURIZATION AND C00LDOWN.
RVS WILL BE TESTED.
THREE MILE ISLAND-2 05000320 042478 IN MODE 1 REACTOR TRIP CAUSED SEVERAL MAIN STEAM RELIEF VALVES TO LIFT.
MAIN STEAM SYSTEMS + CONTROLS 78-034/01T-0 050878 DUE TO INADEQUATE DESIGN, SEVERAL CTEEL LINERS USED TO PROTECT THE BELL VALVES 021272 2-WEEK OWS IN THE DISCHARGE PIPING WERE EJcC.ED.
BECAUSE THIS WAS ON SECONDARY OTHER SIDE OF THE PLANT, AND HO RADIATION WAS RELEASED, EVENT POSLD HO THREAT DESIGN /FABRICATIDH ERROR TO THE HEALTH AND SAFETY OF THE PUBLIC.
DESIGN ITEM NOT APPLICABLE THIS EVENT WAS CAUSED BY AN INADEQUATE DESIGN WHICH ALLCWED THE USE OF B ELLOWS LINERS QUALIFIED FOR 180 F/SEC. STEA!! VELOCITY IN A LCCATION WHER E VELOCITIES UP TO 950 F/SEC. COULD BE EXPERIENCED.
THE UNDER-DESIGNED BELLOWS LINERS ARE BEING REPLACED DY LINERS OF AN APPROPRIATE DESIGN.
i"%EE MILE ISLAND-2 05000320 042S78 IN MODE 5.
DURING MON.htY SURVEILLANCE TESTING OF THE "B"
DIESEL-GENERAT AC ONSITE POWER SYS + CONTROLS 78-037/03L-0 052578 OR, DIESEL TRIPPED DUE TO HIGN CRANKCASE PRESSURE AFTER RUNNING FOR APPR ENGINES, INTERNAL COMBUSTION 021609 30-DAY OXIMATELY 32 MINUTES.
T.S.4.8.1.1.2.A.5 REQUIRES A DIESEL DE DEMONSTRAT SUBCOMPONENT NOT APPLICABLE ED OPERABLE BY RUNNING FOR 60 MINUTES OR MORE.
BECAUSE IN MODE 5 AND OT OTHER HER DIESEL OPERABLE, EVENT POSED NO THREAT TO HEALTH & SAFETY OF PUELIC.
NOT APPLICABLE ITEM NOT APPLICABLE DIESEL GENEPATOR WAS CHECKED FOR ANY ABHORMAL PARAMETERS BUT HCNE WERE F OUND.
THE DILSEL WAS RESTARTED AND SUCCESSFULLY PASSED SURVEILLANCE.
I N ADDITION, CALIBRATION OF CRANKCASE PRESSURE SWITCHES WILL BE CHECKED A HD AIR EJECTOR WILL BE INSPECTED.
THREE MILE ISLAND-2 05000320 050378 IN MODE 5 BURNS 8 ROE NOTIFIED MET ED THAT SINGLE AUXILIARY TRANSFORMER SYSTEM CODE NOT APPLICABLE 78-035/01T-0 050978 OPERATION WITHIN THE NORMAL OPERATING RANGE OF THE GRID WILL NOT PROVIDE COMPONENT CODE NOT APPLICABLE 021271 2-WEEK SUFFICIENT VOLTAGE LEVELS FOR OPERATION OF THE 480 V MOTOR CONTROLLERS SUBCOMPGNENT NOT APPLICABLE DURING PERIODS OF PEAK UNIT AUXILIARY DEMAND.
UNIT HAS NOT OPERATED AT OTHER A POWER LEVEL REQUIRING MAXIMUM UNIT AUXILIARIES.
NO POTENTIAL FOR ADVE NOT APPLICABLE pg RSE EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC.
ITEM NOT APPLICABLE A/E SHOWED THAT WITHIN NORMAL RANGE (232 TO 238KV) ONE TRANSFORMER CAN'T PROVIDE ADEQUATE VOLTAGE LEVELS TO SUPPORT OPERATION OF ENGINELRING SAF
(>4 ETY FEATURES AND BAL$NCE OF PLANT AUXILIARIES.
THREE PC<% ISLE CORRECTIV r sy E ACTIONS EXIST.
U
APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 73 FROM 1969 TO THE PRESENT OUTPUT SORTED Bf FACILITY AND FVENT DATE FACILITY' SYSTEM /
C 0t'P 0 H EN T / C OMP O N E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTIDH/
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 050578 ON MAY 5, 1978. THE LICENSEE WAS NOTIFIED BY ITS NSSS VENDOR THAT TiiE UN REACTIVITY CONTROL CYSTEMS 78-036/01T-0 051878 CERTAINTY FACTORS ASSOCIATED WITH THE INCORE DETECTORS ARL GREATER THAN C ot1P O N EN T CODE NOT APPLICABLE 021610 2-WEEK THAT ORIGINALLY CALCULATED.
AS A RESULT, Tile EXISTING FULL INCORE MINIM SUBCOMPONENT NOT APPLICABLE UM INCORE AND OUT-OF-CORE QUADRANT POWER TILT LIMITS MUST BE REDUCED.
5 DESIGN / FABRICATION ERR 0k INCE THE NEW TILT LIMITS HAVE NOT BEEN EXCEEDED, THERE WAS NO EFFECT ON DESIGN THE HEALTH AND SAFETY OF THE PUBLIC.
ITEM NOT APPLICABLE REEVALUATION PERFORMED BY NSSS VENDOR BROUGHT ABOUT BY OBSERVED OPERATTO HAL CHARACTERISTICS OF INCORE DETECTOR PERFORMANCE AT OPERATING PLANTS.
APPROPRIATE PROCEDURE CHANGES HAVE BEEN 11 ADE AND A TECH SPEC CHANGE REQU EST SUBMITTED TO CORRECT EXISTING QUADRANT POWLR TILT LIMITS.
THREE MILE ISLAND-2 05000320 051278 PERFORMING MONTHLY REACTOR BUILDING ISCLATION AND COOLING /SAPETY INJECTI CNTHMNT ISOLATION SYS + CONT 78-038/03L-0 061278 ON SURVEILLANCE, THE SETTING OF BS-PS-3260 GREATER THAN ALLOUABLE VALUE INSTRUMENTATION + CONTROLS 021608 30-DAY OF SPEC 3.3.2.1 BY 0.02 PSIG.
SINCE REDUNDANT PRESSURE SWITCHES AVAILAB SWITCH LE AND WITHIN CALIBRATION, NO EFFECT ON HEALTH AND SAFETY OF 1hE PUBLIC.
OTHER NOT APPLICABLE ITEM NOT APPLICABLE BS-PS-3260 ERROR CAUSED B INSTRUMENT DRIFT DURING SURVEILLANCE TIME FREQ UENCY.
CORRECTIVE ACTION TAKEN BY ADJUSTING PRESSURE SUITCH TO A VALUE BELOW THE TECHNICAL SPECIFICATION TRIP SETPOINT.
NO FUTURE ACTIDH REQUI RED SINCE MONTHLY SURVEILLANCE WILL BE PERFORt1ED AS REQUIRED.
THREE NILE ISLAND-2 05000320 052078 WHILE PERFORMING SFAS REACTOR BUILDING ISOLATION AND COOLING SURVEILLANC CONI ROOM HABITBLTY SYS + CONT 78-040/03L-0 061573 E TESTING ON MAY 20, 1978, CONTROL ROOM CHILLER AH-C-8B FAILED TO OPERAT INSTRUMLNTATION + CON 1ROLS 021606 30-DAY E.
SINCE THE REDUNDANT CONTROL ROOM CHILLER WAS OPERABLE, THERE WAS NO SWITCH EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC.
COMPONENT FAILURE MECHANICAL BORG-WARHER CORP.
UPON FAILURE OF AH-C-8B, ACTION A WAS ENTERED AND C:1 ILLER RETURNED OPERA BLE STATUS WITHIN REQUIRED TIME.
FAILURE OF AH-C-8B CAUSED BY MICR0 SWI TCH WITH ROUGH EDGE ON STEM, PREVENTING PROPER OPERATION.
ROUGH EDGE RE MOVED AND SWITCH RETESTED OK.
AH-C-8B RETESTED SATISFACTORILY ON T1 A Y 21 1978.
THREE MILE ISLAND-2 05000320 05207b DURING PER"0RMANCE OF SURVEILLANCE PROCEDURE 2303-M16 "EMEREGENCY DIESEL EMERG GENERATOR SYS + CONTROLS 78-039/03L-0 061578 GENERATOR AND COOLING WATER VALVE OPERABILITY TEST", THE "E" DIESEL GEN MECHANICAL FUNCTION UNITS 021607 30-DAY ERATOR FAILED TO START.
SINCE THE REDUNDANT Et1ERGENCY DIESEL GENERATOR SUDCOMPONENT NOT APPLICABLE WAS OPERABLE, THIS DID NOT HAVE AN ADVERSE EFFECT ON THE HEALTH AND SAFE COMPONENT FAILURE TY OF THE PUBLIC.
9ECHANICAL FAIRBANKS MORSE py VERTICAL SHAFT BETWEEN UPPER AND L OWER CRANK SHAFTS FAILED DUE TO I!1P R OP ER MATERIAL. A C0t1PLETE COUPLING OF PROPER MATERIAL UAS INSTALLED AND DF
-X-1B RE13RNED OPERABLE WITHIN REQUIRED TIME.
DF-X-1A aLSO INSPECTED.
PROPER MATERIAL USED IN ITS COUPLING.
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APR 18, 1979 LE? OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 75 FROM 1969 TO THE PRESENT OUTPUT SORTED BY FACILIiY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODEr DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
E V EtiT DESCRIPTION /
C OMP O N E t4 T.1ANUFACTURER CONTROL tiO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 081278 DURING PERFORt1AF - 0F Tile REACTOR BUIL DIt1G PERSJtiNCL AIRLOCV LEAK R\\TE T C N i tiMN T ISOLATI0ti SYS + CONT 78-050/01T-0 082878 ESTING. Tile OVERT.L AIRLOCK LEAKAGE RATE EXCEEDED THAT ALLOWED IN THE UN VESSELS. PRESSURE 022387 2-WEEK IT'S TECHNICAL SPECIFICATI0HS.
A L T HOU Gli THE UtilT WAS Iti MODE 5 AT Tile I CONTAINr1ENT/DRYWELL IME OF THIS TEST, IT ll A D EtiT ERED T10 DES 1 THROUGli 4 SINCE ItiE PRECEDING L DESIGN / FABRICATION ERROR EAK RATE TESTS UERE PERFORMED I ti DECEMBER, 1977. AND THUS CONSTITUTES A C0 tis T RUC T I0ti/ INS T A L L AT ION VIOLATION OF TECH. SPEC.
3.6.1.3.B.
ITEM NOT APPLICABLE LEAKAGE WAS CAUSED BY A 1/4" HOLE DRILLED lHROUGil TliE AIRLOCK BULKHEAD D URING INSTALLATION OF SUPPORTS FOR TiiE ELECTRICAL CABLING.
A M9DIFICATI ON HAS BEEN !1ADE TO PLUG THE IIOLE.
THE AIRLOCK WILL TilEtt BE TESTED AND VERIFIED AS SATISFACTORY PRIOR TO ENTRY INTO MODE 4.
THREE MILE ISLAND-2 05000329 082478 WHILE THE UNIT'S A/E WAS CONDUCTING A REVIEW OF CABLE SPLICES MADE ItiSID SYS REQRD FOR SAFE SHUTDOWN 78-051/01T-1 091978 E CON T AINf1ENT, IT WAS DISCOVERED THAT CERTAIN SAFETY RELATED VALVES DID VALVLS 022390 2-WEEK HOT HAVE CABLE SPLICES, AS INDICATED IN THE TMI-2 FSAR, BUT UERE ItiSTEAD OTHER CONNECTED TO TERMINAL BLOCKS AS Itil TI AL LY INSTALLED.
PERSONNEL ERROR CCNTRACT. 8 CONSULT. PERSONNEL ITEM NOT APPLICABLE CABLES OVERL00KED BY A/E WHEN MODIFICATIONS PERFORf1ED.
CABLES REQUIRING S P L I C I tiG IDENTIFIED.
T!iOSE REQUIRED FOR llEATUP SPLICED AtiD FITTED WITli HEAT SilR I N K TUBING PRIOR TO liEATUP.
R E!! A l tid E R REQUIRING SPLICING At;D 11 EAT SHRINKItiG ACCOMPLISHED PRIOR TO CRITICALITY.
TilREE MILE ISLAND-2 05000320 082878 ON AUGUST 28, 1978, IT WAS DEIERMINED BY Tile UNIT'S A/E Tl!AT THE MAlti ST T1 A l ti STEAM SYSTEMS + CONTROLS 78-052/01T-0 091178 EAM LINES WOULD BE INCAPABLE OF WITHSTANDING A TURBIllE TRIP FR0rl 100% P0 P I P ES, F I T T I tiGS 022388 2-WEEK UER.
SINCE Tile POWER LEVEL NEVER EXCEEDED 30% AND THE A/E'S ANALYSIS Sil 16 INCflES AND LARGER OMED THAT THE M Alti STE AM LINES COULD UITHST AliD A TURBINE TRIP AT 30I POW DESIGN / FABRICATION ERROR ER, TiiE HEALTH AND SAFETY OF THE PUBLIC WAS NOT AFFECTED.
DESIGN ITEM NOT APPLICABLE THE PREVIOUSLY INSTALLED MAIN STEAM RESTRAINlS WERE NOT CAPABLE OF SUPPR ESSING CLOSURE OF THE TURBINE STOP VALVES WITHIN A 50 I1ILLISECOND TIME F RAME AT 100% POWER.
PROPERLY SIZED RESTRAINTS HAVE BEEtt INSTALLED.
THREE MILE ISLAND-2 05000320 0830..
IN 3 9DE 3, DURING MAIt4TENANCE WORK ON REMOTE SilUTDOWN INSTRUMENTATION DI SAFETY RELATED DISPLAY INSTR 78-057/03L-0 092978 SPLAY PATCH PANEL, PANEL POWER SUPPLY ItiADVERTENTLY GROUNDEC CAUSING LOS COMPONENT CODE NOT APPLICABLE 0226S1 30-DAY S OF DISPLAY IttSTRUMENTATION REQUIRED BY T.S.
3.3.3.5.
ALL POINTS COULD SUBCOMPONENT N0; APPLICADLE HEVE BEEN READ AT PATCHBOARD USING DVT1.
BECAUSE UNI'i SliUi JOUN, AND LOS PERSONNEL ERROR T INSTRUMEtiTATION NOT NEEDED AT TliE TIME, EV EtiT DID NOT ENDANGER HEALTli MAINTENANCE & REPAIR PERSONNEL AND SAFETY OF THE PU3LIC.
ITEM tiOT APPLICABLE P E R S O Nii E L PERFORMING MAINTENANCE WORK INADVERTENTLY GROUNDED POWER SUPPL Y TO R EMO T E StiU T D0uti PATCH PANEL INSTRUMENTATION RESULTING I ti D A!! A G E TO CIRCUIT BREAKER IN VITAL SUPPLY 2-SV.
CORRECTIVE ACTION UAS REPLACEMENT OF DAMAGED CIRCUIT BREAKER.
Nas d
P s)
Ch
APR 18, 1979 LER OUTPUT ON EVEtiT S AT THREE MILE ISLAND 1 AND 2 PAGE 76 FROM 1969 TO THE PRESEtiT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C 0t1P 0 tie N T / C OMP 0 tie N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER tiO./
REPORT DATE/
./ENT DESCRIPTION /
C0f!PONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 083178 WHILE IN MODE 3.
AND COOLING DONN AFTER MAIti STEAM RELIEF VALVE TESTING, EtiGNRD SAFETY FEATR INSTR SYS 78-053/03L-0 092678 SAFETY INJECTION CHANNEL C DID t!OT TRIP WHEN PRESSURE WAS REDUCED SELGU ItiSTRUMENTATION + CONTROLS 022387 30-DAY THE 1640 PSI SETPOINT, AS REQUIRED BY T.S.
3.3.2.
REDUNDANT CHANNELS A OTHER AtID B FUNCTIONED PROPERLY.
THEREFORE, iHIS EVEt4T POSED tio THREAT TO TH COMPONENT FAILURE E HEALTH AtID SAFETY OF THE PUBLIC.
ELECTRONIC BAILLY METER COMPANY FAILURE OF THE BI-STABLE (BAILY PART NO. 6631500) iSOCIATED WITH SAFETY INJECTION CH ANtiEL C.
UPON DISCOVERY C H A title L C UAd MAriUALLY TRIPPED AS REQUIRED BY T.S.
3.3.2.
THE FAULTY DI-STABLE WAS REPLACED AND CHANNEL C RETURiiED TO OPERABLE STATUS.
THREE MILE ISLAND-?
0500032 090778 WHILE IN MODE 5, DURING COMPLETION OF A CHANGE MODIFICATION OH CONTAIN.
CHINMNT ISOLATION SYS + CUNT 78-054/03L-0 092778 ISO VALVE DETERMINED THAT WDL V 271 HAD tiOT BEEH SUPPLIED WITH CONTAINME VALVES 022386 30-DAY HT GR ADE lit 11T SUITCHES, TORQUE SWITCH AND MOTOR.
BECAUSE THE REDUNDANT OTHER ISOLATION VALVE WAS OPEkABLE, THE HEALTH AND SAFETY OF THE PUBLIC UAS H PERSONNEL ERROR OT ENDANGERED.
CONTRACT. 1 CONSULT. P E R S Ot4 H E L ITEM NOT APPLICABLE PUP, CHASING ERROR BY UtlIT A/E.
N0ti-C0t4T AltiMEtiT GRADE COMPONENTS USED ON OPERATOR OF WDL V 271.
COMPONENTS REPLACED WITH CONTAINMENT GRADE AND V AlVE RESTORED OPERABLE.
ALL OltiER SAFETY RELATED, MOTOR-OPERATED VALVES IllSIDE CONTAlti. BEING INSPECTED.
THREE MILE ISLAND-2 05000320 090878 IN MODE 5 DURING M0tiTHLY REACTOR CUI L DIrlG ISOLATION AND COOLING FUNCTI0ti C t4 T tiMN T ISOLATI0H SYS + CONT 78-058/03L-0 100478 AL T ES T ItiG, CU N T AINrtEN T ISOLATION VALVE WEDL-V1125 FAILED TO CLOSE ON MA VALVES 022385 30-DAY HUAL INITIATION TEST SIGNAL. VALVE DID CLOSE CH SUBSEQUENT AUTO ACTUATIO OTHER H LOGIC TEST SIGNAL AND SUBSEQUENT MANUAL INITIATION TEST SIGilALS. tio TH OTHEN REAT TO PUBLIC HEALTH At4D SAFETY.
NOT APPLICABLE ITEM NOT APPLICABLE BECAUSE FAILURE OF WDL-V1125 TO CLOSE COULD NOT BE REPEATED ON SUBSEQUEH T I1ANUAL OR AUTO ACTUATION TEST SIGt4ALS BELIEVE THIS EVENT CAUSED BY DIR TY C 0 ti T R O L RELAY CONTACT. AFFECTED RELAY Cot 4 TACT CLEANED AS A PRECAUTION ARY MEASURE.
THREE MILE ISLAND-2 05000320 090878 INVESTIGATING COMPLIANCE WITH IE CIRCULAR 78-05, FOUND ORIGIllAL BOLTED C C N T t4MN T ISOLATION SYS + CONT 78-059/03L-0 100278 DNNECTIONS ON C0t4 T AI ISOLATI0ti VALVES MU-V2A/B NOT TAPED Ili ACCORDA HCE WITH E'4VIR0tiMENT,' NFMT VI.LVE OPERATORS 023076 30-DAY
' ' _. QUALIFIED METHODS.
SINCE EQUIPMENT HAD NOT FAI ELECTRIC MOTOR - AC LED, AND Hi SIlUATI0ti OCCURRED WHICH COULD HAVE PRODUCED ADVERSE ENVIRON PERSONNEL ERROR MEtiT A L COND11I0ti NECESSARY TO C AUSE COMP 0HEt2TS TO FAIL, 140 DAliGER TO Pub CONIRACT. & CONSULT. PERSONNEL LIC HEALTH AtlD SAFETY.
ITEM NOT APPLICABLE P E R S 0 t4 N E L ERROR CURING CONSTRUCTICH ALLOWED TAPItiG OF BOLTED CONNECTIONS N
IN N0ti-EHVIRONMENTALLY QU ALIFI ED 11 AHt4 ER. MOTOR LEADS WERE BUTT SPLICED 10 FIELD WIRING AND COVERED WITH EtiVIRONMEtiTALLY QUALIFIED HEAT SHRINK T U B I t1 G.
INVESTIGATION REVEALED N0 OTHER ERRORS OF THIS TYPE.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 P/LE 77 FROM 1969 TO THE PRESENT GUTPUT SORTED BY FACILITY AND EVEt4T DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
E V EtiT DESCRIPTION /
COMPONENT MANUFACTURER Cu tlT R O L NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 091378 WilI L E IN MODE 5, DURING PERFORMANCE OF SURVEILLANCE 2303-Q5, DAMPER 4072 AIR COND, HEAT. COOL, VENT SYSTEM 78-055/03L-0 100578 C (REQUIRED TO BE OPERABLE IN MODES 1-4) FAILED TO RESPOND TO A CLOSE S VALVES 022652 30-DAY IGNAL.
BECAUSE NO CONDITION EXIST ED WHICli REQUIRED OPERATION OF lilE C 0 ti BUTTERFLY TROL ROOM EMERGENCY VENTILATI0tl SYSTEM, THIS EVEtiT POSED NO IIIRE AT TO IH DESIGN / FABRICATION ERROR E HEALTH AND SAFETY OF THE PUBLIC.
CONSTRUCT 10ti/ INSTALLATION ITEM t40T APPLICABLE DRAWING MISINTERPRETATION RESULTED IN IMPROPER ORIEt4TATION OF CERTAIti CO MPONENTS IN INSTRUMENT AIR TUBING.
THIS CONSTRUCT 10ti PROBLEl1 CORRECTED; ALL 'IR-OPERATED DAMPERS IN CONTROL ROOM El1ERGEtiCY AIR HANDLIt4G SYSTEM INSPECTED, ALL OPERABLE.
REVIEW OF AIR H A N D L I t1G SYSTEM DESIGN FGHND NO OTHER PROBLEMS.
TilREE MIL E ISLAND-2 05000320 091578 PERFORMING SURVEILLANCE PROCEDURE 2303-M21 DISCOVERED TRIP SETPIONT RX B ENGliRD SAFETY FEATR INSTR SYS 78-060/03L-0 101378 LDG PRESSURE SWITCil WAS 3.61 PSIG VS. AlLOUABLE SETPOIt4T OF 3.60 PSIG AS CIRCUIT CLOSERS /IllTLRRUPTERS 022653 30-DAY REQ BY T.S.
3.3.2.1 A C T I 0 t2 ST AT Ef1ENT 10 0F TAELE 3.3-3 0F T.S.
3.3.2.1 SUITCHGEAR COMPLIED UITH SINCE CH Atit1EL W AS TRIPPED TO PERFORM SURVEILLANCE At4D DET OTHER ERMINE SETPOINT.
TWO R E DU t4 D A N T CilANNLLS UERE AVAILABLE AttD WITHIN ALLOW NOT APPLICABLE ABLE TRIP SETPOINT, THUS EVENT DID NOT AFFECT THE HEALTH AtiD SAFETY OF T ITEM NOT APPLICABLE itE PUBLIC.
BS-PS-3987 APPEARS TO IfAVE EXCEEDED THE ALLOMABLE LIMITS BECAUSE OF SETP OINT D?IFT.
THIS PRESSURE SWITCH UAS SUBSEQUEtlILY RECALILRATED TO WITHI N THE ALLOWABLE LIMITS AND ITS CORRESP0 TIDING CHANNEL RETURNED TO SERVICE TIIREE MILE ISLAND-2 05000320 100373 PERFORMING PSEUDO DROPPED RCD TEST, TP 800/31, DISCOVERED NUCLEAR OVERPO REACTOR TRIP SYSTEMS 78-061/03L-0 110178 WER TRIP SETPOINT NOT VERIFIED WITHIN 8 HOURS PRIOR 10 USING SPECIAL TES COMPONENT CODE tiOT APPLICABLE 023079 30-DAY T EXCEPTION 3.10.1 0F THE TECil SPEC AS REQUIRED.
SItiCE TRIP SETPOINTS U SUBCOMPONEN1 NOT APPLICABLE ERE VEDIr.ED BELOW 50%, NO EFFECT 0 14 PUBLIC HE ALTil AND SAFETY.
PROCEDUR DEFECTIVE PROCEDURES E TO FC MODIFIED.
NOT APPLICABLE ITLM NOT APPLICABLE PROCEDURE FOR PSEUDO ROD DROP TEST NOT DIRECT PERSONiiEL TO IMPLEMEtti T.S 3/4 10.1 PRIOR TO PERFORl1It1G TEST; CNLY It4 F ORf1E D THEM TitEY WERE USING SPECIAL TEST EXCEPTION SECTION.
TESTING SUSPEt4DED AND NUCLEAR OVERPCWLR TRIP SETPOIt;TS VERIFIED WITHIN ALLCUABLE LIMITS.
tiUCLEAR HEAT FLUX AND HUCLEAR ENTHALPY RISE HOT CllANNEL FACTORS OK.
TtIREE MILE ISLAND-2 05000320 101478 IN MODE 2 CONTROL ROD DRIVE TRIP EREAKERS WERE CLCSED WITil CNLY ONE SOUR REACTOR TRIP SYSTEMS 78-066/03L-0 111578 CE RAtiGE DFTECTOR OPERABLE VIOL ATIt4G T.S.
3.3.1.1 ITEM 11A UHICH RE7UIRE INSTRUMENTATION + CONTROLS 023083 30-DAY S TWO SOURCE RANGE DETECTORS OPERABLE.
ON 10/29 AND 11/4 Util T EtlTERED M PCWER SUPPLY ODE 3 AND CRD BREAKERS WERE CLOSED WITH ONE SOURCE RAtlGE DETECTOR CPERA3 CCMPONENT FAILURE LE.
IN ALL CASES BOTil SOURCE RANGE CHANilELS WERE MADE OPERABLE PRIOR TO ELECTRONIC ESCALATING 10 t10DE 2.
BAILEY METER COMPANY INOPERABLE POWER SUPPLY FOR ONE SOURCE RANGE CHANNEL.
ALTERilATE PCUER S UPPLY OBTAINED FROM TMI-1 S ATISFYING REQUIREi1ENTS OF T.S.
3.3.1.1 Ott EAC H CF THE VIOLATIONS MENTIONED A20VE.
THE ALTERt4 ATE P.S.
REMOVED IN t10 0 E Cd 1 AND RETURNED TO TMI-1 AT ALL TIMES DURING STARTUP AND POWER OPERATI ON REQUIREMENTS OF LCO 3.3.1.1 WERE MET.
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APk 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 78 FROM 1969 TO THE PRESENT GUTPUT SORTED DY FACILITY AND EVENT DATE FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTIDH/
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTIDH THREE MILE ISLAND-E 05000320 101978 PERFORMING SURVEILLANCE PROCEDURE 2301-3D1 ON 10/19/78 DETERMINEP THti L REAC COOL PRES BOUN LEAK DETEC 78-062/01T-0 lica73 CO ACTION B FOR TECH SPEC 3.4.6.2 NOT INVOKED WHEN SURVEILLANCE PROCEDUR COMPONENT CODE NOT APPLICABLE 023080 E WEEK E 2301-3D1 DATA OBTAINED AT 1935 OH 10/16/78 SHOUED UNIDENTIFIED LEAKAGE SUBCOMPONENT NOT APPLICABLE GREATER THAN 1 GPM (2.6 CPM ACTUAL).
ALL LEAKAGE FROM RCS IS PROCE5 SED PERSC iNLL ERROR THROUGH RADWASTE TREATMENT SYSTEM AND EVENT DID NOT AFFECT PUBLIC HEALT L I C'.N S ED & SENIOR OPERATORS H AND SAFETY.
ITEF NOT APPLICABLE MISINTERPRETATION OF T.S.
3.4.6.2 AND 4.4.6.2 LED TO PERFORMANCE FREQUEN CY FOR SURVEILLANCE ABOVE THAT REQUIRED BY THE T.S.
NOT CLEAR TO PERSCM NEL WHICH SET OF DATA CAME WITHIN T.S.
REQUIREMENT AND WHEN TIME REQUIRE MENTS OF ACTION STATEMENT WERE APPLICABLE.
UNIDENTIFIED LEAKAGE SUBSECU ENTLY REDUCED TO ALLOWABLE.
THREE MILE ISLAND-2 05000320 102978 DUMING NODMAL REACTOR SHUTDOWN RATCHET TRIP OF GRUUP 5 CONTROL RODS OCCU REACTIVITY CONTROL SYSTEMS 78-063/03L-0 112878 RRED AT 100% WITHDRAWN POSITION.
TRIP OCCURRED WHEN GROUP 5 MOTION WAS CONTROL ROD DRIVE MEC;!ANISMS 023081 30-DAY STARTED BY GROUP 6-7 AT 25% INTERLOCK.
POWER LEVEL LESS THAN 1.0 E-3 A:1 SUBCOMPONENT NOT APPLICABLE PS AT THE TIME OF THE TRIP.
AFTER THE RATCHET TRIP, THREE RODS IN GROUP DESIGN / FABRICATION ERROR 5 WERE STUCK AT THE 5% WITHDRAUN POSITION.
THESE RODS WERE FREED WHILE CONSTRUCTION / INSTALLATION THE REACTOR WAS IN MODE 3, BY EXERCISI1v THE RODS INDIVIDUALLY PER VEND DIAMOND POWER SPECAALTY CORP.
OR RECOMMENDATION.
VENDOR-SUPPLIED FIELD CHANGE DESIGNED TO REDUCE PROBABILITY OF RATCHET T RIPS WAS INCORRECTLY INST.iLLED IN THREE GATE DRIVE MODULES (ONE IN CROUP 5,
AND TWO IN AUXILIARY SUPPLY).
FIELD CHANGE WAS CORRECTED; SUBSEQUEH TLY, IMPROVED GATE DRIVE CIRCUITS WERE INSTALLED.
THREE MILE ISLAND-2 05000320 110778 IN MODE 3.
DURING A CALIBRATION CHECK OF THE BWST LEVEL SWITCHES. THE SW OTHER ENGNRD SAFETY FEATR SYS 78-064/03L-0 120478 ITCHES WERE FOUND TO EXCEED THE VALUE ALLOMED BY SECTION 3.3.2.1 0F THE INSTRUMENTATION + CONTROLS 023082 30-DAY TECH SPEC.
ACTUAL BWST IEVEL DID HOT EXCEED T.S.
LIMITS.
BECAUSE POTH SENSOR /DETFCTOR/ELLMENT SWITCHES HAD TRIPPED (THE CONSERVATIVE CONDITION), THIS EVENT DID NOT PR OTHER ODUCE AN ADVERSE EFFECT ON THE HEALTH AND SAFFTY OF THE PUBLIC.
NOT APPLICABLE ITEM NOT APPLICABLE THIS EVENT WAS CAUSED BY THE EWST LEVEL SWITCHES BEING OUT OF CALIBRATIO N.
THE SWITCHES WERE CALIBRATED AND RETURNED TO SERVICE.
THREE MILE ISLAND-2 05000320 111278 IN MODE 5 DURING LOAD SERVICE TESTING OF BATTERY CHARGERS FUSES BLEW IN DC ONSITE POWER SYS + CONTROLS 78-067/03L-0 121178 CHARGERS 2-2A DND 2-2B RESULTING IN LOSS OF BATTERY CHARGER FOR THE P-FN BATTE?.IES + CHARGERS 023084 30-DAY SECTION OF BATTERY BANK 2-25B WHICH VIOLATES TECH. SPEC.
3.8.2.3.
A RED SUBCOMPONENT NOT APPLICABLE UNDANT SET OF BATTERY CHARGERS AND FULLY CHARGED LATTERIES WERE AVAILABL COMPONENT FAILURE E AND THIS EVENT DID NOT AFFECT PUELIC HEALTH AND SAFETY.
ELECTRICAL EXIDE INDUSTRIAL DIV A GATING FILTER MODULE Ih EACH BATTERY CHARGER WAS DEFECTIVE.
EXIDE EAT TERY CHARGER MODEL NO. UPC 130-3-400; GATING AND FILTER MODULE NO.
101 0 71 f29.
DEFECTIVE MODULES WERE REPLACED AND NEW FUSES INSTALLED.
EDTH rs)
CHARGERS WERE REENERGIZED AND SCR FIRING MODULES ADJUSTED FOR EACH CHARG Js ER TO ASSURE CURRENT BALANCE.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 79 FROM 1969 T) THE PRESENT FACILITY / SYSTEM /
CCMPONENT/ COMPONENT SUSCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCUDE/
LER HO./
REPORT DATE/
EVENT DESCRIPTION /
C0fPONENT 11 A NU F A C T UR ER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION T H R E l-MILE ISLAND '
05000320 111578 IN MODE S PERFORING SURVEILLANCE PROCECURE 2302-R16. IT UAS FOUND 12 DIE EMERG GENERATOR SYS + CUNTROLS 78-068/03L-0 121373 SEL GENERATOR LOA 9 SEQUENCE TIMERS' SETPOINTS WERE OUTSIDE THE TDLERANCE RELAYS 023085 3C-DAY S SPECIFIED IN TECN. SPEC. TAELE 4.8-2.
SINCE THE SETPOINT VARIANCES WE TIf E DELAY, PNEUMATIC RE NOT SIGNIFICANTLf GREATER THAN ALLOWED. DIESEL GENERATOR LOADING WOUL OTHER D NOT HAVE BEEN ADViRSELY AFFECTED AND THIS LVENT COULD NOT HAVE AFFECTE NOT APPLICABLE D THE HEALTH AND S'.FETY OF THE PUBLIC.
AGASTAT RELAY CO.
TOLERANCE LIMIiS FOR THESE SETPOINTS ARE VERY CLOSE AND SETPOINT CRIFT M AY HAVE CAUSED TIMERS TO EXCEED T.S.
TOLERANCE.
AFFECTED TIf1ERS UERE If1 MEDIATELY CALIBRATED TO TOLERANCE SPECIFIED IN T.S.
TABLE 4.8-2.
FUTURE CORRECTIVE ACTION IS PRESENTLY DEING INVESTIGATED.
THREE MILE ISLAND-2 05000320 120178 IN MODE 3 HEATUP PROCEDURE 2102-1.1 WAS BEING PERFORMED UHICH REQUIRED C OTHR INST SYS REQD FOR SAFETY 78-070/03L-0 122878 LOSING OF CRD BREAKERS.
AFTER BREAKERS UERE CLOSLD DETERft!NED THAT INTE COMPONENT CODE NOT APPLICABLE 023426 30-DAY Rf1EDI ATE RANGE NEUTRON FLUX AND RATE FUNCTIONAL SURVEILLANCE (2313-SU2)
SubCOMPONENT NOT APPLICABLE WAS NOT PERFORMED AS REQUIRED BY T.S.
4.3.1.1.1.
INSTRUMENTATION WAS PR DEFECTIVE PROCEDURES OVEN TO BE FUNCTIONAL AND EVENT DID NOT AFFECT PUBLIC HEALTH AND SAFETY.
NOT APPLICABLE ITEM NOT APPLICABLE WHILE COMMENCING UNIT HEAT UP THE REQUIREMENT IN 2102-1.1 TO INSURE THAT 2313-SU 2 BE COMPLETED WAS INADVERTANTLY MISSED.
UPON DETERMINATION OF THIS REQUIREMENT 2313-SU c WAS PERFORMED IMMEDIATELY UITH SATISFACTORY RESULTS.
PROCEDURE 2102-1.1 WILL BE REVISED TO PREVENT RECURRENCE.
THREE MILE ISLAND-2 05000300 120878 ON DECEMBER 8, 1978. IT MAS DET.RMINED THAT THE CONTROL LOGIC FOR THE M'.
REAC COOL CLEANUP SYS + CONT 78-071/01T v 122178 KE-UP (HPI) PUfPS ALLOWED TWO PUMPS TO START CN A SING' F DIESEL GENERATO PUM'S 023428 2-WEEK R DURING LOSS OF OFFSITE POWER WITHOUT ESF ACTUATION.
. INCE AD:11NIS T R AT OTHER IVE CONTROLS WERE IftMEDIATELY APPLIED THERE WAS NO EF. 0T ON THE HEALTH DESIGN / FABRICATION ERROR AND SAFETY OF THE PUBLIC.
DESIGN ITEM NOT APPLICABLE A DESIGN DEFICIENCY IN THE CONTROL LOGIC UHICH COULD HAVE ALLOWED THE ST ARTING OF TWO MAKEUP PUMPS FROM A SINGLE DIESEL GENERATOR UAS CORRECTED.
THE DESIGN MODIFICATION REVISED CONTROL CIRCUITS TO PREVENT THIS FROM OCCURRING.
THREE MILE ISLAND-2 05000320 121378 PERFORMING SURVEILLANCE PROCEDURE 2303-M35. CONTAINMENT ISOLATION VALVES CNTNMNT ISOLATION SYS + CONT 78-072/03L-0 010279 RR-V2A, RR-V2B. CF-V144 AND SV-V54 FAILED TO CLOSE ON AUTCMATIC ACTUATI RELAYS 023429 30-DAY ON TEST SIGNAL.
THIS IS A VIOLATION OF T.S.
3.3.2.1 UHICH REQUIRES TUO CONTROL. GENERAL PURPOSE MINIMUM CPERABLE CHANNELS IN MODES 1 THROUGH 4.
REDUNDANT VALVES WERE O COMPONENT FAILURE PERABLE FOR 'dE AFFECTED PENETRATIONS; THUS NO EFFECT ON PUBLIC HEALTH A MECH 4NICAL ND SAFETY.
- SMITH, A.
O.
THE ABOVE LISTED VALVES DID NOT RECEIVE THE TEST SIGNAL BECAUSE ACTUATIO N LOGIC RELAY 63Z1B/RB1A WAS INOPERABLE.
RELAY WAS DISASSEMBLED CLEANED
/ND ALIGNED.
SEVERAL MANUAL AND ELECTRICAL OPERATIONS UEFE THEN PERFOR pg MED SUCCESSFULLY.
NO FUTURE CORRECTIVE ACTION IS CONSIDERED NECESSAR(.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAt1D 1 AND 2 PAGE 80 FROM 1969 TO THE PRESENT FACILITY / SYSTEM /
COMPONENT / COMPONENT SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER NO./
REPORT DATE/
EVENT DESCRIPTION /
COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION THREE MILE ISLAND-2 05000320 121578 AT 0800 HOURS ON DECEMBER 15, 1978, THE AIR PUMP COR HP-R-227 UAS FOUND AREA MONITORING SYSTEMS 78-073/03L-0 011579 TO BE SEIZED, CAUSING HP-R-227 TO BE INOPER ABL E.
SINCC REACTOR B U I L D I tiG PUMPS 023431 30-DAY GRAB SAMPLES WERE TAKEN EVERY 24 HOURS, AS SPECIFIED BY TECH. SPEC. 3.4 VANE TYPE
.6.1 THIS EVENT DID NOT AFFECT THE HEALTH AND SAFETY OF THE PUBLIC.
DESIGN / FABRICATION ERROR DLSIGN GAST MANUFACTURING CORPORATION WATER IN SAMPLE LINES TO AIR PUMP APPEARS TO BE CAUSE OF *EI2URE.
PUMD REPLACED HEAT TRACING APPLIED TO SAMPLE LINES AND HP-R-227 RETURNED GPER ABLE.
ENGINEERING EVALUATION BY A/E REOUESTED TO DETERMINE ME1 HOD nF PR EVENTING WATER IN SAMPLE LINES.
IN THE ItiTERIM PERIODIC CHECKS WILL BE f1 A D E.
THREE MILE ISLAND-2 05000320 122878 WHILE IN MODE 1 DURING A PERIODIC DIESEL-GENERATOR SURVEILLANCE. DIESEL AC ONSITE POWER SYS + CONTROLS 78-074/03L-0 012379 GENERATOR DF-X-1B DID HOT START THEREEY CAUSING THE ACTION S T AT Lf1ENT ASS FILTERS 023430 30-DAY GCIATED WITH T.S.
3.8.1.1 TO EE ENTERED.
BECAUSE NORf1AL POULR UAS AVAIL SUBC0f1PONENT NOT APPLICABLE ABLE AND BECAUSE THE OTHER SFAS STRING AND ITS PCUER SUPPLY U ?. S AVAILABL COMPONENT FAILURE E,
THE EVENT DID F JT AFFECT THE HEALTH AND SAFETY OF THE PUBLIC.
NATURAL END OF LIFE NUGENT, WM W.
C0 EVEtaT APPARENTLY CAUSED BY A PARTIALLY CLOGGED FUEL OIL FILTER.
THE FIL TER REPLACED AND OF-X-1B DEMONSTRATED OPER.SLE IN ACCORDANCE UITH ACIICN STATEMENT REQUIREMENTS.
IN ADDITION DIESEL GENERATOR SURVEILLANCE FREQ UENCY WAS INCREASED IN ACCORDANCE WITH IMI-2 T.S.
THREE MILE ISLAND-2 05000320 010379 ON 01-03-79 IN MODE 1 DETERMINED SURVEILLANCE PROCEDURE 2304-W1 BORATED REACTIVITY CONTROL SYSTEMS 79-006/03L-0 013179 WATER SOURCE VERIFICATION SCHEDULED FOR 01-02-79 HAD NOT BEEN PERFurMED.
COMPONENT CODE NOT APPLICABLE 025038 30-DAY THIS IS A VIOLATION OF T.S.
4.1.2.9 ANS 4.5 4.
SINCE EUST UAS II;MEDI A SUBCOMPONENT NOT APPLICABLE TELY CHECKED AND FOUND WITHIN ALLCWABLE LIMITS, NO EFFECT ON PUBLIC HEAL PERSONNEL ERROR TH AND SAFETY.
RADIATION PROTECTION PERSONNEL ITEM NOT APPLICABLE BWST WAS IMMEDIATELY SAMPLED AND ANALYZED FOR REQUIRED CONCENTRATION.
I HSTRUCTION OF PERSONNEL ON SURVEILLANCE VERIFICATION TECHNIQUES Ht a TAKE N PLACE TO ASSURE THAT THIS EVENT DOLS NOT RECUR.
THREE MILE ISLAND-2 05000320 010479 OH 1/4/79 REVIEWING DATA COLLECTED DURING PERFORMANCE OF 2303-M7 GN 12/1 CNTNMNT HEAT REMOV SYS + CONT 79-001/03L-0 020179
/78 DETERMIt1ED REACTOR BUILDING PRESSURE HI-HI CHANNEL A FUNCTIONAL TEST INSTRUMENTATION + CONTROLS 025004 30-DAY NOT PERFORMED VIOLATING T.S.
4.3.2.1.1.
SINCE RB PRESSURE HI-HI CHANNE INDICATOR L A FUNCTIONAL TEST WAS PERFORf1ED SATISF ACTORILY ON BOTH 11/10/78 AND 1/
PERSONNEL ERROR 5/79 SYSTEM UAS NOT OPERATING IN DEGRADED MODE AND THERE WAS NO EFFECT 0 MAINTENANCE a REPAIR PERSONNEL N PUBLIC HEALTH AND SAFETY.
ITEM NOT APPLICABLE A SECTION OF SURVEILLANCE Ph0CEDURE 2303-M7 WAS INADVERTENTLY OMMITED BY TECHNICIAN WHO PERiORMED SURVEILLANCE ON 12/1/78.
APPROPRIATE IIC PERS ONNEL WILL BE ADVISED OF THIS EVENT TO PREVENT A FUTURE RECURRENCE.
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APR 18, 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 1 AND 2 PAGE 81 FROM 1969 TO THE PikESENT GUTPUT SORTED BY FACILITY AND EVENT DATE FACILITY / SYSTEM /
C O MP 0 H EtiT / C OMP u t1E N T SUBCODE/
DOCKET NO./ EVENT DATE/
CAUSE/CAUSE SUBCODE/
LER t10./
REPORT DATE/
EVENT DESCRIPTION /
COMP 0HEtiT MANUF ACTURER C 0 tit R O L NO. REPORT TYPE CAUSE DESCRIPTIuti TilREE MIL E ISLAND-2 05000320 010579 AT 0957 CONTROL ROD 6-12 DROPPED ;NTO T il E CORE.
ICS IMMEDIATELY BEGAN T REACTIVITY C0tiTROL SYSTEMS 79-003/03L-0 020279 0 REDUCE POWER TO APPROXINATELY 58%
AS A RESULT OF DROPPED ROD E0Til QU COMPONENT CODE NOT APPLICABLE 025005 30-DAY ADRANT POWER TILT STEADY STATE LIl11T AND TRAtlSIENT LIMIT UERE EXCEEDED.
SUBCOMPONEtiT NOT APPLICABLE STEADY STATE AND TR AtiSIENT QU ADR ANT POWER TILTS WERE RETURNED TO ALLOUA OTHER BLE LIMITS BY 1032.
AS MAXIMUM TItT LIl1IT WAS tl0 T EXCELDED REACTOR PCUE NOT APPLICABLE R RAN-BACK AS DESIGNED AtiD ALL SYSTEt1S FUtiCTIONED PROPLRLY.
NO LIFECT 0 ITEM NOT APPLICABLE N PUBLIC HEALTH AND SAFETY.
BLOWF CUSE ON B PHASE FOR CR 6-12.
FUSE WAS REPLACED AND ACCEPTADLE VOL T O AG'-
oHD CURRENT MEASUREMENTS OBTAINED.
SHUTDOUN f1 A R GI N VERIFIED ABOVE 2% ?ELiA K/K AND QUADRANT POWER TILT T10NITCRED ll0URLY FOR 12 HOURS.
RO D RESTORED OPERABLE WITHIN ONE HOUR AtID QUAnRANT POWER TILT RESTORED WIT llIN 30 t11HUTES.
THREE MILE ISLAND-2 05000320 010579 PERFORf1ING REACTOR BUILDING SPRAY PUMP FUNCTIONAL TEST AllD VALVE OPERABI OTHER ENGNRD SAFETY FEATR SYS 79-004/03L-0 020279 LITY TEST, CONTROL ROOM INDICATION AtiD OPERATOR CBSERVATION UERE tt0T IN VALVES 025006 30-DAY AGREEt1ENT CONCERilING POSITI0tt 0F BS-V-10. SYSTEM DECLARED INOFERABLE AND GLOBE ACTION STATEMElli 0F T.S.
3.6.2.1 Ell T E R E D.
BECAUSE REDUNDANT BLDG. SPRA COMPONENT FAILURE Y SYSTEM AND RFACTOR BLDG. EMERGENCY COOLING SYSTEM UERE OPERABLE.
NO E MECHANICAL FFECT ON PUBLIC HEALTH APID SAFETY.
ALOYCO, I ti C.
FURTHER INVESTIGATION REVEALED DISAGREE!1EtiT CONCERNING VALVE POSITI0ti UA S DUE TO A BENT VALVE STEM.
f10DIFICATIO!1S UERE (1ADE TO ALLOW VALVE OPER ATOR TO FUNCTI0tl ON STRAIGHT PORTION OF THE STEM.
VALVE WAS RE-ASSEMBLE D,
STROKE TIME TESTED AND DECLARED OPERABLE. IN FUTURE SPACER BETWEEN VA LVE AtiD OPERATOR WILL BE ret 10VED AND STE!1 REPL ACED.
TilREE MILE ISLAND-2 05000320 010879 IN MODE 1 LEAKAGE WAS REPORTED IN THE VICINITY OF DH-R-9B.
It4V EST I G A T I O RESIDUAL HEAT REM 00 SYS + CONT 79-005/03L-0 020279 NS REVEALED A SMALL CRACK IN A PIPIf1G UELD JUST UPSTREAM 0F T il E '/ A L V E.
PIPES, FITTINGS 025007 30-DAY REPORTABLE PER T.S.
6.9.1.9.D.
EFFLUEt4T WAS SAMPLED AND ACTIVITY UAS LE NO SUBCOMPONENT PROVIDED SS THAN MINIMUM DETECTABLE LEVEL.
THUS NO EFFECT ON PUBLIC HEALTil AliD S COMP 0HEtiT FAILURE AFETY.
IIE Cil A tlI C A L ITEM NOT APPLICABLE EVENT CAUSED BY A CR ACK ED '.JEL D WHICH R ESUL T ED FROM VIBR A T ION.
CORRECTIV E ACTION TAKEN TO MINIMIZE LEAKAGE.
SUBSEQUENTLY THE JRACKFD SECTI0ti 0F PIPItiG MAS WELD REPAIRED.
AE IS EVALUATIt1G IF ADDITIONAL RIPE HANGERS ARE REQUIRED TO REDUCE VIBRATION.
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8 0
0 2
8 8
0 0
JOB 4325 2
8888888888 0
0 PRINTR5 JOB 4325 2
8 8 0 0
STD 2
8 8 0 0
2 8
8 0 0
2 8
8 0 0
4/18/79 2
8 8 0 0
18:29:20 4/ 18/79 222222222222 8888888888 0000000000 18:29:20 JEANNIE JEANNIE JEANNIE JEANNIE M
- M e
M M
M M
N M
M W
M M
M M M
M M
M M
M M
M M
M M
h M
h M M k M M M N M M M M M P M M M m M
M M
M M
M M
n W
M h
W h
4 m
W W h h a m M M % M M M = W M A
e M
M M
=>
m M
h 9
4 9
m M
e
=
m 4
m a M M M Mh M M h M M M M % M h
=
M M
m e
M
=
M M
m m
a M
m a
M M
M
=
m M
h M
m M
M e
M
=
M h M
M M
M M
MM M h h a h
- 4 M W M M M M M
M M
M M
h M
a M
M W h h h M h M M M '
M m
M M 4 > M M k M Pd END JOB 4325 E U B f1 A R K 4 4/18/79 JEANNIE W00Y41 BOX 280 J :-
END JOB 4325 EUSMARK4 4/18/79 JEANNIE WOOY41 BOX 280 END JOB 4325 EUEMARK4 18:29:20 JEANNIE PRINTRS BOX 280 LND JOB 4325 EUBMARK4 18:29:20 JEANNIE PRINTRS BOX 280 t,.a COMPUTER CENTER N AT I 0tl AL INSTITUTES OF HEALTH LJ7 BUltDING 12, ROOM 1100, BETHESDA, MARYLAND 20014