Text

LER Output on Events at TMI-2 from 1969 to Present. Sorted by Event Date
	ML19308C954
Person / Time
Site:	Crane
Issue date:	06/25/1979
From:	; NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
To:	;
Shared Package
ML19308C953	List: ML19308C954;
References
	TASK-TF, TASK-TMR NUDOCS 8002110693
	Download: ML19308C954 (20)
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JUN 25. 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE f k- ' >

O FROM 1969 TO TNE PRESENT OUTPUT 50eTED BY FACItITY AND EVENT DATE e

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. c FACILITY / SYSTEM /

v i: a h ' t. f COMPONENT / COMPONENT SUBCODE/

DOCKET NO./ EVENT DATE/

W p '.

I.

CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

O ComeCNENT MANUrACTuRER CONTR0t NO. REeCRT Tyre CAUsE DESCRIeTION 4

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THREE MILE 15LANJ-2 05000320 092872 STEEL INNER TIE PLATE WEIGNING 400 POUND 5 AND USED TO kASTEN ING CO 4 /#4', l '

t REACTOR VESSEL INTERNALS 72 02L 102572 VER TO YOP OF PRESSURE VESSEL, FELL INTO VESSEL SCRATCNING CN ORE IN

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OTHER COMPONENTS 002378

'0-DAY STRUMENTATION N0ZZLE.

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$UBCOMPONENT NOT APPLICABLE PERSONNEL iRROR g

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F-n CAUSE SUSCODE NOT PROVIDED W

NO MANUFACTURER SPECIFIED P4 O

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't PLATE NOT PROPERLY SECURED TO 5 HIP *ING COVER.

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THREE MIL ( ISLAND-2 05000320 061473 AFTER CC'*PLETING $EVEN POURS OF $9 :CE BUILDING CONCRETE IT O S FOUND T C-kyi b

OTNER SYSTEMS' 73 02L 071873 HAT PRE-PLACEMENT OR POUR IN$PECTIONS HAD HOT SEEN COM!'L E T ED.

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D OTHER COMPCHENTS 001197 30-DAY I D.+i

,l SUBCOMPONENT NOT APPLICABLE t b / >/

UN)

9.

A 7

DEFECTIVE PROCEDURES

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CAUSC SUBCODE NOT PROVIDED i I

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NO MANUFACTURER SPECIFIED

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7 1 INADEQUATE Q-A-QC PROGRAM.

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. ~. e at THREE MILE ISLAND-2 05000320 072975 DURING INSPECTION OF THE CONTROL BUILDING IT WAS FOUND THAT AT ELEVATION SYSTEM CODE NOT APPLICABLE 75 02X 082875 331.5 FEET A VERTICAL MECHANICAL AND ELECTRICAL CNASE WAS BOUNDED BY 70 O

C3

.7 00*tPONENT CODE Nur APPLICABLE 013t85 OTHER 0 SQ FEET OF WALL CONSISTING OF 8 INCH AND 6 INCH H0tt.JW BLOCKS. THESE C O

.+

i' SUSCOMPONENT HDT APPLICABLE ONCRETE BLOCK WALLS WERE NOT DESIGNED TO MEET SFISMIC LOADING CONDITICNS l'

O M

DESIGN / FABRICATION ERROR L

CAUSE SUBCODE NOT PROVIDED 4

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ITEM NOT APPLICABLE b

$t? I i CONSTRUCTION ERROR. CONCRETE BLOCK WALLS WERE REMOVED AND REPLACED WITH I

STRUCTURAL STEEL AND A Q-DECK TYPE PANELING.

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THREE MILE ISLAND-2 05000320 061876 DURING CONSTRUCTION EFFORTS INVOLVING SHIELD Watt 5 AND SL ABS AROUND THE

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FUEL HANDLING SYSTEMS 76 02X 073076 FUEL TRANSFER TUBES. VOIDS WERE DISCOVERED IN Tete CONCRETE AROUND THE TR W

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OTHER COMPONENTS 015363 OTHER ANSFER TUBES. EACH VOID WAS APPROXIMATELY 18 INCHES NIGH AND 6 TO 8 FEET - d $

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503 COMPONENT NOT APPLICABLE WIDE.

_ DESIGN / FABRICATION ERROR Cy "I i CAUSE SUSC00E NOT PROVIDED Q3

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ITEM NOT APPLICABLE c-..----

p g)S INADEoUATE CONCRETE PLACEMENT. VOIDS WERE REPAIRED c_

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k,W'< i,5b' ' ".5 JUN 25. 1979 LER CUTPUT 04 EVENTS AT THREE MILE ISLAND 2 PAGE 2 I'

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FROM 1969 TO THE PRESENT CUTPUT SORTED BY FACILITY AND EVENT DATE g

% Y;,, t4 FACILITY / SYSTEM /

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' ' g'l f,Q t 1 COM*0NENT/ COMPONENT SUSCODE/

DOCKET NO./ EVENT DATE/

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CAUSE/CAU$E SUSCODE/

LFR NO./

REPORT DATE/

EVENT DESCRIPTION /

w O

COMPONENT MANUFACTURER C. ' TROL NO. REPORT TYPE CAUSE OESCRIPTION p.

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THI.EE MILE ISLAND-2 05000320 080376 RESPON5E TIMES FOR A NUMBER OF SAFETY FE ATURES OBT AINED DURING TESTING R S ))

I 4

'4 +

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CMERG CORE COOLING SYS

CONT 76 02L 090276 EVEALED THAT THEY WERE CREATER THAN THE VALUES LISTED I4*THE FSAR. TMESE k'

()

INSTRUMENTATION + CONTROL 5 015725 30-DAY SYSTEMS INCLUDE THE REACTOR Ebl.CING ISOLATICN. NIGN 4 LOW PRE 550RE INj k

n NO SUSCCMPONENT PROVIDED ECTICN. REACTOR BUILDING EMERCMCY FANS AND OTHERS.

.'J W ', w "1 ' I

/

c 2

COMPONENT FAILURE b

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CAUSE SUSCODE NOT PROVIDED r3 SYSTEMS WERE IN HEED OF SOME MODIFICATIONS TO ALTER RESPCM ' TIMES. THIS t ;,<5 4 }1 Qf-(s)

ITEM NOT APPLICABLE EFFORT IS PRESENTLY BEING MADE.

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N.f.yf,, (4 THIEE MILE ISLAND-2 05000320 112276 FIRE OCCURRED IN THE MOTOR CONTROL CENTER ON THE 305 f.tEVAi De tLVL OF

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J' b' g i OTHER SYSTEMS 76 02L 021177 THE AUXILIARY SUILDING. THE FIRE WAS EXTINGUISMED UT!6121F-J I.N AMD DRY Ia 4}

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O, CIRCUIT CLOSERS / INTERRUPTERS 017231 30-DAY CHEMICALS.

NO SUSCCMPONENT PROVIDED

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A4 OTHER h

Pi CAUSE SUSC00E NOT PROVIDED

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ITEM NOT APPLICABLE C

CAUSE WAS MI5 ALIGNED STAB ASSEMBLIES CONNECTED TO BREAKER ASSOCIATED WIT i

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H PUMP $!ARTER. TNIS CAUSED ELECTRICAL ARC TO DEVELOP WHICM SUSSEQUENTLY b9y.}. A I.

,4 IGNITED VERTICAL Ih$ULATIhG BARRIER.

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REACTOR CONTAINMENT SYSTEMS 77 02L 092177 PRAY SYSTEM PUMPS. IT WAS DISCOVERE') THAT THE B PUMP DID N3T MEET THE PU jld 4 ' b [7 TH2EE MILE ISLAND-2 05000320 082277 DURING THE COURSE OF OSTAINING 7 UMP HEAD CURVE 5 FOR THE TMI-2 BultDING S 8

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UnPS 0i9+w 30-DAY MP HEAD CURVES SuPPtIED sY THE vENoCR.

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i4 NO SUSCOMPONENT PROVIDED

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OTHER NOT APPLICABLE f Y *[j '. ' w 'j

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BABC0CK & WILCOX COMPANY f*

i4J NO REASON COULD BE FOUND. PUMP ROTATING ELEMENTS HAVE BEEN RETURNED TD p., T. y * '

f HE VENDOR FOR RETESTING.

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SEVERAL GE TYPE SBN SWITCHE5 WERE FOUND TO HAVE FAILED DURING TESTING. C WI

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THREE MILE ISLAND-2 05000320 092177 C~C OTNER SYSTEMS 77 02L 102177 74 IJ U/.p4p' O

CIRCUIT CLOSERS / INTERRUPTERS 019441 30-DAY MC I

NO SUSCOMPONENT PROVICED rd I

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CON CNENT FAILURE 7M CAUSE SUBCODE NOT PROVIDED (tr O k J r..

t CJ IT E'1 NOT /**LICA5LE FAILURES WERE DUE TO CRACKS 8 BREAES IN CAM FOLLOWERS. GE NOTIFIED OF P 1,

', t f R O B F. EM. REPLACEMENT SWITCNES ORDERED.

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JUN 25. 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 3 ba WK Y*,N

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F R O*t 1969 TO THE PRESENT r-TQ t

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OUTPUT SORTED BY FACILITY AND EVENT DATE tm$

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FACILITY / SYSTEM /

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l COMPONENT / COMPONENT SUBCODE/

DOCKET NO./ EVENT DATE/

5

$ 4.. g tc s% 4 CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

D COMPONENT MANOFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTICM

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THREE MILE ISLAND-2 05000320 020878 DURING INITIAL FUEL LOADING. A SURVEILLANCE (REQUIRED BY T.S. 4.9.9.

AND

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3' GA5 RADIO *CT WSTE MANACMNT SYS 78-001/03L-0 022878 4.3.3.1 TABLE 4.3.3 ITEM 2.5.1.A AND 2.B. IIA) IhDICATED'TNAT THE REACTO n

D COMPONENT CODE NOT APPLICABLE 020993 30-DAY R BUILDING PURGE SUPPLY FANS AND ASSOCIATED PURGE RECIRCULATION DAMPER 5

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SUBCOMPONENT NOT APPLICABLE YSTEM. WERE INOPERABLE.

THIS EVENT PRODUCED NO EFFECT ON THE HEALTH AND d.

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DESIGN / FABRICATION ERROR SAFETY OF THE PUBLIC.

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CONSTRUCTION / INSTALLATION

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ITEM NOT APPLICABLE INCOMPLETE CONSTRUCTION. REACTOR BUILDING PURGE FANS AND DAMPERS COULD Q:

HOT BE DEMONSTRATED OPERABLE. DO NOT OPERATE TAGS WERE PLACED CM CONTA!

9 NMENT PURGE AND EXHAUST VALVES. AFTER COMPLETION OF CONSTRUCTION SURVEI 9

c3 LLANCE TEST 1HG WILL BE PUN.

UNTIL THEN CONTAIN9ENT PURGE VALVES AND EXH

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AUST PENETRATIONS WILL REMAIN CLOSED.

PU-V

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THREE MILE ISLAND-2 05000320 020878 PRIOR TO INITIAL FUEL LOADING. A VENDOR INSPECTION REVEALED A MANUFACTU M

OTHR INST SYS REQD FOR SAFETY 78-002/03L-0 022878 RER*5 DEFECT IN PLATE 6 0F THE SEI5MIC INSTRUMENTATION TRIAx!AL RESPONSE f.

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INSTRUMENTATION + CONTROLS 020999 30-DAY SPECTRUM RECORDER 714. THUS VIOLATING THE SURVEILLANCE REQUIREMENTS OF h

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T.S. 4.3.3.3.2 TABLE 3.3.7.

ITEM 4.A.

THIS EVENT PRODUCED NO EFFECT ON

+

DESIGN / FABRICATION ERROR THE HEALTH AND WELFARE OF THE PUBLIC.

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RECCRDER

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MANUFACTURING

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- d4 mC ITEM NOT APPLICABLE THIS EVENT OCCURRED DUE TO A MANUFACTURER'S DEFECT. A REPLACE"ENT SET 0 F PLATES HAS BEEN ORDERED AND UPON ARRIVAL. WILL BE INSTALLED AND THE R I

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l ECORDER VERIFIED OPERABLE.

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i THREE MILE ISLAND-2 05000320 020978 ON FEBRUARY 9 AND 10. 1978 SAMPLES TAKEN FROM INDUSTRIAL WASTE FILTER SY h-II '

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't ld.. Q h OTHER AUX WATER SYS + CONTROLS 78-001/04X-0 03t378 STEM (IWFS) SUMP INDICATED LEVELS OF TS$ AND PH OF 476 MG/L. 9.5 AND 297 V

COMPONENT CODE NOT APPLICABLE 021287 OTHER MG/L. 9.66. RESPECTIVELY. THESE EXCEEDED NPDES PERMITS LIMITATIONS OF 1 g

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$ j [ j,a' f; SUBCOMPONENT NOT APPLICABLE 00 MG/L TSS (TOTAL SUSPENDED SOLIDS) AND A PH RANGE OF 6.0 TO 9.0.

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NOT APPLICABLE l g 'A VA-V, ITEM NOT APPLICABLE SUMP PUMP WAS RAISED TO INCREASE SETTLING CAPACITY IN SUMP UNTIL IT COUL v.

-e D BE PUMPED CLEAN.

SU"P WAS CLEANED 2/13/78.

A NEW INTERIM TREATMENT S

<< 44M.'i YSTEM TO BE INST ALLED IS EXPECTED TO PROVIDE PH ADJUSTMENT 'FOR WASTEWATE qi. ;

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R FROM IWF5 $ UMP.

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- g THREE MILE !$ LAND-2 05000320 021378 WHILE IN MODE e6 IT BECAME EVIDENT THAT A CONTINUOUS FIRE WATCH (AS REQU g,ji FIRE PROTECTION SYS + CONT 78-003/0tT-0 022778 1 RED BY T.S.

3.7.10,5) WAS NOT ESTABLISHED. WHEN THE CABLE ROOM HALON SY g,

O CCMPCNENT CODE NOT APPLICABLE 023077 2-WEEK STEM'S AUTOMATIC ACTUATION FEATURE WAS RENDERED INOPERABLE TO ALLOW CONS l'pi.,0' V

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SUBCOMPONENT NOT APPLICABLE TRUCTION WELDING. THIS EVENT PRODUCED NO EFFECT ON THE HEALTH AND SAFET

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- PERSONNEL ERROR Y OF THE PUBLIC.

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.P tICENSED 8 SENIOR OPERATORS eit W e'

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ITEM NOT APPLICABLE MISINTERPRETATION BY PORC AND SHIFT SUPEkVISOR. ASSU"ED HALON SYSTEM O' J-ERABLE BUT AUTOMATIC ACTUATION FEATURE WAS DE-ENERGIZED. THUS FIRE WATC i

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PERSONNEL INSTRUCTEJ.

w j[. < ' k H NOT ESTABLISHED WHILE AUTOMATIC ACTUATION DEFEATED. SYSTEM REENERSIZE

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JUN 25. 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 4 WK n*. N I, I

h]$ j ' M(*[

'CCj C

FRCM 1969 TO THE PRESENT OUTPUT SORTED BY FACILITY AND EVENT DATE t

E FACILITY / SYSTEM /

.f, r COMPONENT /CCMPONENT SUSCODE/

00CRET NO./ EVENT DATE/

s 4

CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

Os COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION

$' (. ).

.I TH;EE MILE 15 LAND-2 05000320 021478 AFTER INITIAL FUELING DISCOVERED 2 FUEL ASSE"BLIES WERE. LOADED INTO THE

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OTHR INST SY$ NOT REQD FR 5FTY 78-004/01T-0 022778 REACTOR VESSEL WITHOUT HAVING SOURCE RANGE AUDIBLE CCUNTS IN THE CCNTAIN

[T O_

INSTRUMENTATION + CONTROLS 023078 2-WEEK MENT BUILDING AS REQUIRED BY T.S.

3.9.2.

BOTH VISUAL AND AUDIBLE COUNTS 3

44 SENSOR / DETECTOR / ELEMENT OBSERVED IN CONTPOL ROCM AND CONTROL ROOM PERSONNEL Id COMMUNICATICN WI

*

I PER50hNEL ERROR TN PERSONNEL IN REACTOR BUILDING. NO EFFECT 04 PUBLIC HEALTH AND SAFETY.

p.g LICENSED A SENIOR OPERATCR5 8

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ITEM NOT APPLICABLE

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+

AUX IN-CORE NEUTRON DFTECTORS REMOVED TO LOAD FINAL 2 FUEL ASSEMBLIES.

THESE PROVIDED AUDIBM C01NT RATE INDICATION INSIDE CONTAINMENT. SINCE Y,. *- e: i

()s ES IN M005 f6. AUDIBLE INDICATION PROVIDED BY PERMANENTLY INSTALLED CUT =

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AUDIBLE COUNT RATE INDICATION IN REACTOR BUILDING 15 REQUIRED AT ALL TIM f

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OF-CCRE DETECTORS.

, y, ( >?, 4N TH;EE MIL E ISL AND-2 05000320 021678 DURING SURVEILLANCE TESTING THE REVERSE POWER RELAY ACTUATED CAUSING DIE n -

EMERG GENERATOR SYS + CONTROLS 78-007/03L-0 031678 SEL GENERATOR DF-X-tB TO TRIP.

ND ADVERSE EFFECT ON THE HEALTH AND 5AFE I 11 S '( ~

D INSTRUMENTATION + CONTROLS 021000 30-DAY TY OF THE PUBLIC COULD HAVE RESULTED BECAUSE THE REVERSE PCWER REttY 15 l R$t SWITCH BYPASSED DURING EMERGENCY OPERATING MODE AND O!ESEL GENERATCR DF-X-tA AS 4, g 4 i

COMPCHENT FAILURE REQUIRED WHILE IN MODES 5 AND 6 WAS CPERABLE.

INSTRUMENT d I-C ITEM NOT APPLICABLE 4.F.,'

THE PROBABLE CAUSE OF THE REVERSE POWER RELAY ACTUATION WAS A SPURICUS A

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CTUATION OF THE RELAY.

THE RElnY WAS RESET AND THE SURVEILL ANCE TEST ON THE DIESEL GENERATOR WAS RERUN AND SUCCESSFULLY CCMPLETED. NO FURTHER

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CORRECTIVE ACTION 15 REQUIRED.

$ 4.

I TH;EE MILE 15 LAND-2 05000320 021778 AFTER INITIAL FUELING IT WAS DETERMINED THAT CORE ALTEERATIONS. INSERTIO D

INST RL' MEN T A T ION + CONTROL 5 023986 2-WEEK BRCREN AND WHIL E DIRECT COM'*UNIC A T IONS WITH THE CCNTROL ROOM WERE N37 M

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REACTOR VESSEL INTERNAL 5 78-006/09T-0 030278 N OF INCCRE DETECTOR 5. HAD BEEN MADE WNEN CONTAINMENT INTEGRITY HAD 9EEN

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SENSCR/ DETECTOR / ELEMENT AINTAINED. SINCE THE FUEL WAS UNIRRADIATED AND NO ACTIVITY WAS RELEASED adj DEFECTIVE PROCEDURES THERE WAS NO ADVERSE EFFECT TO THE HEALTH AND SAFETY OF THE PUOLIC.

J NOT APPLICABLE g

D ITEM NOT APPLICABLE e

PRIOR TO INSERTION OF INCORE DETECTOR 5 IT WA5 NOT RECOGNIZED THAT THIS E Ig, VOLUTION FELL WITHIN THE DEFINITION OF CORE ALTERATIONS. TO PREVENT FUT URE RECURRENCE. SHIFT PERSCNNEL INSTRUCTED THAT INCORE P'0VEMENTS CONST!T 6 {-

D UTE CORE ALTERATIONS. FUELING PROCEDURES WILL BE MODIFIED.

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THREE Mite ISLAND-2 05000320 022478 DURING MODE 5. WHIL E PERFORMING FIN 4L TUMOVER INSPECTIONS. IT WAS DETER j

FIRE PROTECTION SYS + CONT 78-005/63L-0 032578 MINED THAT THREE FIRE PENETRATION SEALS WERE NOT FUNCTIONAL, PER T.S.

3.

O PENETRATIONS.PRIMRY CONTAIMMNT 021001 30-DAY 7.11 BECAUSE THERE WAS NO FIRE AT THE T!*E. AND BECAUSE A FIRE WATCH W

=-if.I' 4

ELECTRICAL AS IMMEDIATELY POSTED. THIS EVENT PRODUCED NO ADVERSE IMPACT ON THE HEAL II

"" DE51GN/ FABRICATION ERROR TH ANJ SAFETY OF THE PUBLIC.

CONSTRUCTION / INSTALLATION O

ITEM NOT APPLICABLE O

.i SEALS WERE BREACHED DURING COMPLETION OF CONSTRUCTION. FIRE WATCH WAS P I

OSTED AND SEALS RETURNED TO FUNCTICNAL STATUS.

CONSTRUCit0N PERSONNCL M AVE BEEN INSTRUCTED AS TO THE NEED TO CCMPLY WITH THE RECUIREMENTS Or TE I

D CH SPEC RELATIVE TO FIRE BARRIER SEAi5.

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.m JUN 25. 1979 LER CUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE $

3

't k

o FRCM 1969 TO THE PRESENT iT' ip.N V

CUTPUT SDRTED BY FACILITY AMD EVENT DATE tr$

FA CIL I TY/ 5 YS T Eat /

N CCMPONENT/ COMPONENT SUBCODE/

DOCKET NO./ EVENT DATE/

rCi k.' C #

6 CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

k ' ' d M

i D

COMPONENT MANUFACTURER CONTROL MO. REPORT TYPE CAUSE DESCRIPTION f34

/ j7

),

TH;EE MILE 15 LAND-2 05000320 030278 DURING PRE-OP TESTING OF CONTROL ROD DRIVE MECHANISMS RCD DRIVE TRIP BtE FEACTIVITY CON'ROL SYSTEMS 78-039/03L-0 031678 AKER5 WERE CLD5ED AND CONTROL RODS WITHDRAWN FCR PRE-OP TESTING PRIOP T c w h'..

O-CONTROL ROD DRIVE MECHANISMS 021002 30-DAY 0 PERFORMANCE OF CRD TRIP BAEAKER FUNCTICNAL TEST.

THIS EVENT CCCURRED L

A SUSCCMPDNENT NOT APPLICABLE WHEN REACTOR COOLANT BCRON CONCENTRATION WA5 IN EXCESS CF 2.000 PPM AND C;g'9

~t_

PERSONNEL ERROR PRGDUCED NO AD R5E EFFECT ON PUELIC HEALTH AND SAFETY.

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n LICENSED & SENIOR OPERATORS U

ITEM NOT APPLICABLE O

'fhM' 4

IT WAS NOT REALIZED THAT WHEN CRD BREAKERS CLOSED SUB'"0DE ST ATE H AD BEEN

' '48 ENTERED WITHOUT ALL SURVE!LLANCE RECUIRE"ENTS HAVING BEEN SATI$FIED. CR

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D BREAKERS WERE OPENED. AND ALL SURVEILLANCE REQUIREMENT 5 WERE SATISFIED

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4 6

BEFCRE PROCEEDING.

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t TH2EE MIL E ISL AND-2 05000320 030378 CN MARCH 1 1978. STATION PERSONNEL WORKED IN THE INDUSTRIAL WASTE TREAT

Q OTHER AUX WATER SYS + CONTROLS 78-002/04T-0 030878 MENT SYSTEM (IWTS) SUMP TO REMOVE PLUGGED INLET STRAINER 5 CN 3CTH WASTE U-COMPONENT CODE NOT APPLICABLE 021288 2-WEEK INFLUENT REED PUMPS AND TO CLEAN DESRIS FRC"f THE WASTE INFLUENT FEED PUM O

.d?

SUBCCNPONENT NOT APPLICASLE P SUCTION PIT.

AS SAFETY PRECAUTION FCR WORKERS AN EMERGENCY B ACKUP Plat F g' T. C. 1 PERSONNEL ERROR P WA5 TEMPCRARILY INSTALLED IN THE SU"P.

04 MARCH 2.

1978. AM CPERATICN

) '. ' ' g DTHER es Al CHECK OF THE IWT5 $ UMP FOUND THE EMERGENCY BACKUP PUMP RUNNING.

APPR

^ IE U

ITEM NOT APPLICABLE 0x!MATELY 60.000 GALLONS 08 WATER WAS MISTAKENLY DISCHARGED TO RIVER.

O q'4

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4 THE E"ERGENCY PUMP WAS STCPPED AND REMOVED FRCat THE $ UMP, d ?

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O jj th THIEE MIL? ISLAND-2 05000320 030778 CONTRARY TO TECHNICAL SPECIFICATION 4.0.5 WHICH INVCKES AS"E SECTION XI 6 Jd'A REAC C00 CLEANUP $YS + CONT 78-010/03L-0 040478 TESTING FOR CODE CLASS 1 2.

AND 3 PUMPS AND VALVES. THE RIVER WATER PU*1 1, 3 O

VALVE 5 02t003 30-DAY P CUTLET AND PRELUSE VALVES. AND THE REDUNDANT RCP SEAL INJECTION VALVES O

- * ~S OTHER HAD NOT BEEN FUNCTIONALLY TESTED BEFORE THEIR RESPECTIVE SYSTEMS HAD 3E DEFECTItf PROCEDURES EN PLACED IN SERVICE.

NOT APPLICABLE a

C-ITErt NOT APPLICABLE I ~

O

1l PRELU9E AND REDUNDANT SEAL INJECTION VALVES WERE NEWLY IDENTIFIED AS BEI

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^

NG WITHIN !$1 SCOPE HAVING BEEN ADDED BY DESIGN CHANGES.

31VER WATER PU I

O MP CUTLET VALVES NOT INCLUDED IN CRIGINAL ISI SUP"I551CN DLE TO MISINTER eRETATION OF THEIR DeEeATICN. TNESE vAtvES HAvE sEeN INC0ee0RATtD INTO O

ISI PROCEDURES AND TESTED.

THXEE MILE ISLAND-2 05000320 031178 T.S. 3.6.1.3 VIOLATED.

ENTERED MCDE 4 WITHOUT PROPERLY ESTABLISHING COM

- yf CNTNNNT ISCLATION SYS + CON 78-O t t/0 3L-C 040778 TAIMMENT INTEGRITY. SURVEILLANCE CN R.S.

DOCR seals NOT PERf0RMED WITH!

I '. b O

l'ENETRATIONS.PRIMRY CONTAIN"NT 021004 30-DAY N PREVIOUS 72 HOURS.

Att CONTAINMENT AIR LOCK 000R5 WERE I"?EDIAYEtY TE O

PER5CNNEL ACCESS STED.

R.3.

PERSONNEL HATCH INNER DOOR FAILED TO MEET L EAK AGE ACCEPT ANCE

(

"" DEFECTIVE PROCEDURES g

CRITERIA.

SINCE UNIT HAD MOT YET GONE CRITICAL N3 EFFECT ON HEALTH AND lf NOT APPLICABLE SAFETY CF PUBLIC.

h PITTSBURGH-DES MOINES STEEL. CD O

SURVE!LLANCE PRUCEDURE NOT S*ECIFIC ENOUGH TO IDENTIFY TMAT R.B. DOOR SE Al LEAKAGE TEST MUST BE MET TO BOTH ESTA9tISM AND MAINTA!N CONTA! W NT I U

NTEGRITY.

INNER DCOR FAILED DUE TO DAMAGED C RING SEAT.5.

THE O R!nc WA

$ REPLACED AND INNER COOR RETESTED SATISTACTORIL

Y. PROCEDURE

S WERE CHtM O

}

GED TO CLARIFY TESTING REQUIREMENTS.

(

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JUN 25. 1979 LER QUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 6 LT_'a

<C-FROM 1959 TO THE PRESENT y-CUTPUT SCRTED BY FACILITY AND EVENT DATE C2 O '

gJ FACILITY / SYSTEM /

b__ dn COMPONF1T/CCMPONENT SURC0DE/

DOCKET NO./ EVENT DATE/

'l !

CAUSE/CAUSE SUBCODE/

LER MO./

REPORT DATE/

EVENT DESCRIPTION /

N _O.. (j O

COMPCNENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION

'Od TH2EE MILE ISLAND-2 05000320 031478 ENTERED MODE 4 WITH ONLY ONE OPER ABL E BUILDING $PR AY SYSTEM SINCE SURVEI PUMPS C21005 30-DAY CH SPEC 4.S.2.A. 4.0.2.8 AND 4.6.2.1.8.

PU"P 1A WAS PREVIOUSLY TESTED $

O

)Y l CNTN"NT HEAT REMOV SYS + CONT 78-012/03L-0 041078 LLANCE CN BUILDING SPRAY PUMP 1A WA5 NOT CURRENT WITHIN THt' LIMITS C5' TE ATISFACTORILY AND WAS AGAIN TESTED SATISFACTCRILY FCLLOWING THIS EVENT.

{

'h ";

e FERSONNEL ERROR NO EFFECT CN THE HEALTH AND SAFETY OF THE PUBLIC.

t Y

OTHER A

LICENSED & SENIOR OPERATORS O f CLERICAL ERROR.

DATE WNICM MUST BE USED TO DETERMINE IF A SutcVE!LLANCE E'

(

ITEM NOT AP P L IC AB t.E IS CURRENT IS THE EARLIEST DATA DATE ANr NOT THE DATE THE SURVEILLANCE W I

.6 AS CO*PLETED.

THE DATE SURVEILLANCE WAS COMPLETED WA5 RECORDED C4 'uE M i

L yf O

U ODE 4 CHEC% LIST. OPER ATIONS PERSONNEL WILL 3E REIN 5YRUCTED.

o TH2EE MILE 15tAND-2 05000320 031578 5 DIESEL GEN TAGGED OUT OF SERVICE 1445 FOR MAINTENANCE. REDUNDANT SIES n

E*EAG GENERATOR SYS + CONTROLS 78-013/01T-0 032778 EL GEN NOT DEMONSTRATED CPERASLE UNTIL 1805.

ADDITIONAttY BREAKER ALIGN

^9 i

O b

}

b ENGINES. INTERNAL COMBUSTION 021006 2-WEEK MENT REQUIRED SY TECH SPEC 4.8.1.1.1.A NOT PERFCR*ED UNTIL 1805.

ND EFF SUBCOMPONENT NOT APPLICABLE ECT ON HEALTH AND SAFETY OF PUBLIC.

y l

4 PERSONNEL ERROR i

CONSTRUCTION PERSONNEL O

fN(.

D ITEM N1T APPLICASLE INADEQUATE REVIEW OF TECH SPEC 3.8.1.1.5 AND ASSOCIATED ACTION STATEMENT

+

2 '9(I 3

. SUCCESSFULLY TESTED REDUNDANT DIESEL GENERATOR AND VERIFIED BREAKER A L

LIGSMENT IN ACCORDANCE WITH TECH SPEC.

PERSONNEL WILL BE INSTRUCTED.

g s s..f

{sg THEEE MILE !$ LAND-2 05000320 05tS7L WHILE THE UNIT WAS IN MODE 3 AND THE SURVEILLANCE REQUIREMENTS OF T.S. 4 7

m CNTHMNT ISOLATION SYS + CONT 78-Ot4/03L-0 04f278

.6.f.3 WERE BEING PERFORMED, THE INNER D00R SEALS ON TOTH AIRLOCKS FAILE h g?

w PENETRATIONS.PRIMRY CONTAINMNT 02128C 30-DAY D.

AT LEAST ONE DOOR ON EACH AIRLCCK WAS MAINT AINED ( LOSED PER THE ACTI F.

ON STATEMENT OF T.S.

3.6.f.3.

SINCE THE UNIT HAD NOT fET CONE CRITICAL.

5 THERE k!A5 NO EFFECT CN THE HEALTH AND SAFETY OF THE P JBLIC.

[] p

PERSONNEL ACCESS COMPONENT FAILURE O

s('

MECHA*i! CAL PITTSBURGH-DES MOINES STEEL CO THE INNER DOORS DID NOT SEAT WITH A CLOSE ENSUGH TOLERANCE. THE UNIT WA

<gj6 5 PLACED IN COLD SHUYDOWN WITHIN 30 HOURS FOR OTNER REQUIRE.D MAINTENANCE f

O {4

. WN!LE IN COLD SHUTDOWN. BOTH INNER DOCRS WERE ADJUSTED TO PROVIDE A C

' A g

LOSER FIT AND RETESTED AS SATI5 FACTORY.

't V

TH2EE MILE ISLAND-2 05000320 03f778 AFTER DESIGN REVIEW BY B3W RECOG"IZED THAT POSSIBILITY EXISTED FOR ENCt0 p ^ A.,

e COOLANT RECIRC SYS + CONTROLS 78-015/01T-0 032778 SURE END CAP OF OTSG INSTRU*ENTATION INSPECTION OPENING ASSEM3LY TO ROYA b

HEAT EXCHANGERS 021007 2-WEEK TE THERE3Y CAUSING DISENGAGEMENT OF N t' T TO STUD. END CAP MAY HAVE LCOSEN D,g f ED AND UROPPED INTO OT5G HA3 THIS NOT BEEN DISC 0tERED. CN INSPECTION DET STEAM CENERATOR

"" DESIGN / FABRICATION ERROR ERMINED THAT END CAP HAD NOT LOOSENED. NO EFFECT ON HEALTH AND 5AFETY 0 i

F PUBLIC.

O DESIGN O

sAsCCCs & WItC0x COMPANY A WELD WAS PLACED IN THE ENCL 0suRE END CAP. THUS PREVENTING ITS ROTATICM O

i O

i Oi i

5 0-O

n

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JUN 25, 1979 LER DUTPUT 04 FVENTS AT THREE **ILE ISL AND 2 PAGE 7 1~

i FROM 1969 TO THE PRESENT t

A OUTPUT SCRTED BY FACILITY %ND EVENT DATE

'l 81 tr_n/

FACILITY /5YSTEM/

CO***0NENT/ COMPONENT SUSCODE/

DOCKET NO./ EVENT DATE/

'. 9 7

Jr CAUSE/CAUSE SUBCCDE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

O O

CO*iPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION s

TN;EE MILE ISLAND-2 05000320 032278 IN MODE 3 PERFORMING BUS VOLTAGE VERIFICATICN AND OPTIMIZA 104 STUDY TWO ik' ENGNID 5AFETY FEATR INSTR SYS 78-016/01T-0 040578 INDEPENDENT NUCLEAR RIVER WATER LOOPS WEPE NOT OPERAPLE T T.

3.7.4.1 O

PUPS O21008 2-WEEK TWO NUCLEAR RIVER WATER PUMP 5 IN ONE LOOP COULD NOT BE STARTED.

O BECAUSE A REDUNDANT LOOP WAS AVAILABLE THIS EVENT PRODUCED NO ADVERSE EP O[ '.

DE51GN/ FABRICATION ERROR PECTS ON HEA(TN AND SAFETY OF THE PUBLIC.

[

OTHER

' *j

~

DESIGN 1

rx 1*

(J ITE*1 NOT APPLICABLE THE BURNING OUT OF A SUPERVISORY LIGHT SULB AttCWED A "$4EAK" CURRENT PA 3

4 TH TO BE INTRODUCED, PREVENTING RELAYS FROM DC-ENERG! ZING AND PREVENTED 3

BOTH NUCLEAR RIVER WATER PUMP 5 IN A LOOP FRO ** OPERATING.

THE PUthED-CUT

.ll',

O LIGHT BUL5 WAS REPLACED. NUCLEAR RIVER WATER PUMP CIRCUIT CESIGNS W:lt O

e +

r BE REVIEWED.

TNIEE MILE 15 LAND-2 05000320 d32478 DURING AN EQUIPMENT INSPECTION. THE 1/2 INCH INLET N!PPLE SOCKET WELD JO RESIDUAL HEAT REMOV SYS + CONT 78-017/03L-0 042tT8 INT TO DH-V121B AT THE t4" DH-P-1B SUCTION LINE 5055 WAS OP5ERVED TO SE b

PIPES FITTINGS 02f279 30-DAY LEAKING.

SINCE THERE WAS NO ACTIVITY IN THE RC SYST E*t AND T HE LE AK W A$

6 i. 4

'L sc LESS THAN 4 IMCNES NEGLIGIBLE, THERE WAS NO EFFECT CN THE HEALTH AND SAFETY CP TOE PU3LIC.

DESIGN /FA*RICATION ERROR CONSTRUO7 ION / INSTALLATION O

,t C

ITEM NOT APPLICABLE SYSTEM HAD UNDERGONE TESTING PER SURVEfttANCE REQUIRE *ENTS OF T.5. 4.5.2

.D.3.A AND ND LEAw5 035ERVEDI BELIEVED THE WELD JOINT WAS Dt" AGED DURING

(

CONSTRUCTICM ACTIVITIE5 5U35EQUENT TO TESTING. WELD JOINT HAS BEE % REP

'O AIRED WITHIN T.S.

3.5.2 REQUIREMENTS. N3 fURTHER ACTION CONSIDERED NECE O

+-

SSARY.

THXEE MILE ISLAND-2 05000320 032578 WFILE IN MODE 4 IT WAS DETERMINED ONLY ONE BOROM SOURCE FLCW PATM VERIF i.,

REACTIVITY CCNTROL SYSTEMS 78-023/03L-0 042478 IED CPERABLE PRIOR TO MODE 4 ENTRY, THUS VIOLATING T.S. 4.1.2.2.3.

BECA

)

COM*0NENT CODE NOT APPLICABLE O21278 10-DAY USE THE VALVE LINEUP FOR THE REQU!kED SECOND rLOW PATH WAS FOUND TO SE U O

i NCHANGED FROM THE PREVICUS SURVE!LLANCE PERTORMANCE. THIS EVENT POSED NO h*

SUSCCMPONENT NOT APPLICABLE THREAT TO THE HEALTH AND SAFETY OF THE PUBLIC.

I PERSONNEL ERROR LICENSED 1 SENIOR OPERATORS O

U-ITE9 NOT APPLICABLE CLERICAL ERROR.

SURVEILLANCE PERFORMED IN ACCORDANCE WITH MODE 5 REQUIR E*?E N T S. SECOND SURVEILLANCE DONE IN ACCORD ANCE WITN P'0DE 4 REQUIREPLNTS l'

. PERSONNEL WILL BE INSTRUCTED CONCERNING NEED TO RErERENCE PROCECURE D P

ATA SHEETS AND VERIFY CURRENT VALVE LINEUP.

O" D

E THZEE MILE !$tAND-2 05000320 032878 IN MODE 3 FAILURE OF AN AMPLIFIER PRODUCED ERR 0NEOUS READINGS ON ASSOLUT SAFETY RELATED DISPLAY INSTR 78-019/01T-0 040578 E CONTROL RQD POSITION INDICATOR FOR RCD 5 0F GROUP S.

POSITICM CF CONT C

INSTRU**ENTATION + CONTROLS 021009 2-WEEK ROL ROD WAS DETERMINED FRCM PULSE STEPPING POSITION INDICATOR AND ZON R O

FERENCE INDICATION. MODE 2 ENTERED CONTRARY TO T.S.

3.0.4 NO ADVERSE

-8' PCWER SUPPLY EFFECTS ON HEALTH AND SAFETY OF PUSLIC.

I Y

'" PERSONNEL ERROR LICENSED & SEMIOR OPERATOR 5 O

INCORRECT INTERPRETATICN OF T.S. 3.1.3.3.A.2 LED 70 v!0tATION CF T.S. 3.

}

fsO ITEM NOT APPLICABLE 0.4.

APPROPRI ATE STATICN PERSONNEL WILL BE INSTRUCTED AS TO THE CCERECT

(

INTERPRETATION OF T.S.

O O

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O' O

O

]

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Os C=B cEl T

O p[e JUN 25. 1979 LER OUTPUT 04 EVENTS AT THREE MILE ISLAND 2 PAGE 8 f.

{C:)Q i,i FROM 1969 TO THE PRESENT fPj-OUTPU" SDRTED BY FACILITY AND EVENT DATE I j ;y% [ p' Ne' FACILITY / SYSTEM /

\\ <T, k COMPONENT / COMPONENT SUBCOLE/

DOCKET NO./ EVENT DATE/

GyO f

CAUSE/CAUSE 50BCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

j O

COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION h ki'f[

INMODE2VITALBUS2-tVBECAME2E-ENERGIZEDREQUIRINGOPbATION IN ACT!

/$Y%

THREE MILE 15 LAND-2 05000320 032578 050178 DN STATEMENT TO T.5.

3.8.2.1, 3.3.E.1 (TABLE 3.3-3 ITEMS 3A AND 39). 3.3

'~ i 02i 52 30-DAY

.3.5. AND 3.3.3.6.. NO ADVERSE SAFETY CONCERNS. REACTOR TRIPPED. ECCS ru e

AC ONSITE POWER SYS + CONTROLS 78-021/,03L-0 0

IN3fRunENTATION + CONTR0t5 NCTIONED PER DESIGN. AND VITAL BUS WAS RE-ENERGIZED WITHIN TIME FRAME OF CONTROLLER APPLICABLE ACTION ST ATEMENTS RETURNING AFFECTED EQUIPMENT TO CPERA3LE S I,2,

.T i

COMPONENT FAILURE TATUS.

e. 6-M ELECTRONIC O

$0 TID STATE CONTR0tS. INC.

VITAL BUS INVERTER FAILED TO FUNCTION PROPERLY IN FREE RUNNING MODE. WM

' 77

(

EN ALTERNATE (AC) SCURCE TRIPPED DURING SFAS TESTING RESULTING IN BLOWN

+

h TAL BU$ AND FAULTY INVERTER CONTROL MODULE AND FUSE WERE REPLACED.

O. F If h FUSE ON DC INPUT.

ALTERNATE SOURCE AC BREAKER WAS CLO5ED ENERGIZING VI 4 f..J a,a.

4...

I4

(>

THtEE M!t! ISLAND-2 05000320 040478 WHILE IN MODE 5. WNILE PERFORMING SFAS TESTING. A NUCLEAR SERVICE CLOSED

.)

RESIDUAL HEAT REMOV SYS + CONT 78-024/03L-0 050478 COOLING VALVE (N5-V839) FAILED TO OPEN. THUS VIOLATING T.S. %.7.3.1.

B ECAUSE THE UNIT WAs IN C0tD SHuTDCwN eMODE 5> AND THE Sv5TtM WAS NOT REO O

3

0 vAtvES 02t277 30-DAY UIRED. THIS EVENT POSED NO THREAT TO THE HEALTH AND SATETY OF THE PUBLIC l

N02ZLE

3. -

t COMPCNENT FAILURE MECHANICAL I

6 ASSOCIATED CONTROL EQUIPMENT THIS EVENT WAS CAUSED BY THE MALFUNCTION OF THE SOLENDID OPERATED PILOT

i' VALVE.

THIS SOLENGID OPERATED PILOT VALVE WAS REPA! RED AND RETURNED TO

,.I1 3>Y 5

SERVICE.

O

] *h..f A.

I h ;'"' Th TH%EE MILE ISLAND-2 05000320 040878 WHILE IN MODE 3. RCS WIDE R ANGE PRESSURE TR ANSMITTER RC-3 A-PT4 FAILED. C ENGNRD SAFETY FEATR INSTR SYS 78-026/03L-0 050278 AUSING TRIP ON SFAS CHAN4ELS RC2A/S.

ACTION STATEMENT ASSOCIATED WITH T

$ i O

INSTRUMENTATION + CONTROLS 021276 30-DAY

.5.

3.3.2 TABLE 3.3-3. ITEM 1B WAS ENTERED. BECAUSE REDUNDANT INSTRUMEN O

4 TATION WAS AVAILABLE THIS EVENT POSED N3 THREAT TO THE HEALTH AND SAFETY

O TRANSMITTER OF THE PUBLIC.

COM?0NENT FAILURE t

ELECTRCHIC O

l O

FOXSORO CO.

THE THIS EVENT WAS CAUSED BY A M0!$TURE-INDUCED SHORT CIRCUIT IN THE TERMINA i

L BOX ASSOCIATED WITH RC-3A-PT4.

THE SHORT WAS FOUND TO BE IN THE TR ANS i

MITTER CIRCUIT. A RESISTOR IN THE TRANSMITTER JUNCTION BOP WAS REPLACED

. THE TRANSMITTER WAS THEN ZERO SPANNED, AND RETURNED TO SERVICE.

O THREE MILE ISLAND-2 05000320 041378 I'd MODE 2. MET-ED INFORMED BY B AW TH AT CONDITIONS NOT SPECIFICALLY CCN$I CO3LANT RECIRC SYS + CONTROLS 78-027/01T-0 050278 DERED IN THE SAR OR T.S.

EXISTED REGARDING HYPOTHETICAL SMALL BREAK ON D D

PUMPS 02t275 2-WEEK 15 CHARGE SIDE OF REACTOR COOLANT PUMP.

REMEDIAL ACTICN NECESSARY TO PRE O

VENT DEVELOPMENT OF UNSAFE CONDIT10NS:

T.S. 6.9.1.8.I APPLICABLE. NO BR OTHER EAK ACTUALLY OCCURRED. N0 THREAT TO HEALTH AND SAFETY OF THE PUBLIC.

~ DESIGN / FABRICATION ERROR DESIGN O

ITEM NOT APPLICABLE SMALL BREAR ON THE DISCHARGE $1DE OF A REACTOR COOLANT PUMP IS MORE t!"I TING THAN BREAR ANALY2ED IN SAR.

MO$f ACCEPTABLE SOLUTION WAS MANUAL CR 055 CONNECTING HPI DISCHARGE AND MANUALLY CPENING DISCHARGE VALVES.

O i

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D 9

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i 0-.5)

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a FavvTmr Sb3 l'

JUN 25. 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 9 e-KO,1 FRCM 1969 TO THE PRESENT

)

OUTPUT SORTED SY FACILITY AND EVENT DATE 322.0 i

/

FACILITY / SYSTEM /

C_q

/<a h' h

ji CONPONENT/ COMPONENT SUSCODE/

DOCKET NO./ EVENT DATE/

CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

o COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION O

$. g.

t0 *.

4^ e THIEE MILE ISLAND-2 05000320 041578 WNILE IN MODE 2 AND PERFORMING SURVEILLANCE 2303-M10. VENTILATION DA" Et AIR COND, HEAT, COOL. VENT SYSTEM 78-029/03L-0 051078 D-4093 (CONTROL BUILDING EXHAUST) DID NOT CLOSE AS REQUIRED UPON RECEIP I

5 D

WALVES O21274 30-DAY T OF A HIGd CHLORINE SIGNAL.

BECAUSE A REDUNDANT COMPCNEVT WAS CPERADLE O I el SINGLE BLADE

, AND BECAUSE DAM *ER D-4098 WAS RESTORED TO OPERABLE STATUS WITHIM THE T lQ t

PERSONNEL ERROR IME FRAME REQUIRED BY THE ACTION STATEMENT OF T.S.

3.7.7.1. THIS EVENT P MAINTENANCE 8 REPAIR PERSONNEL 05 D HO THREAT TU ft'E HEALTH AND SAFETY OF THE PUBLIC.

v /. I O

..t nU ITEM NOT APPLICABLE D CYCLED Ta ASSURE PROPER OPER ATICN.

INCPER ABLE DAMPER W AS RETURNED TO

' ),})g %

IMPROPERLY ADJUSTED DAMPER LIM AGE.

LINKAGE WAS ADJUSTED. LUBRICATED AN SERVICE WITh!N TIME CONSTRAINTS OF THE T.S. ACTION STATEMENT. SURVEILt4

i.

p)

NCE 2303-M10 WAS SUBSEQUENTLY REPERFORMED SATI5FACTCRILY.

O t

r THREE MILE ISLAND-2 05000320 041778 IN M00E 2 CN 4/17/78 RPS CHANNEL C TRIPPED ON HI FtUX.

ENTERED ACTION S t

REACTCR TRIP SYSTEMS 78-030/03L-O 051778 TATEMENT 2 0F T.S.3.3.1.1.

CHANNEL EXAMINED. NO PROBLEMS DISCOVERED. RE O

INSTRUMENTATION + CONTROLS 021612 30 <AY TURNED TO SERVICE. CH 4/20/78. RPS CHANNEL C TRIPPED ON HI FLUX.

INVES O

k *. -

SENSOR / DETECTOR / ELEMENT TICATION REVEALED SPIKING NOW CONTINUOUS. CHANNEL PLACED IN TRIPPED CON CCMPONENT FAILURE DITION.

THREE OTHER REDUNDANT INSTRUMENTS CCNTINUOUSLY MONITORING THE S

-?

INSTRUMENT AME PARAMETER. NO EFFECT CN HZALTH AND SAFETY OF PUBLIC.

16 5 g

O 3./

V WESTIhGHOUSE ELECTRIC CORP.

INITIALLY SPIKE ATTRIBUTED TO ELECTRICAL NOISE AND CHANNEL RETURNED TO S l */

ERVICE. AFTER REMOVAL OF MI-7. AND UPON EXAMINATION, FAILURE DETE* MINED YO BE CAUSED BY DAMAuE DURING INITIAL INSTALLATION. NI-7 HAS 3EEN REPL O

ACED AND FAILED DeTECTet !$ Br!NG RETURNED TO MANuFACiUetR FCR REeAle.

O k

<g TH;EE MILE ISLAND-2 05000320 041978 WNILE PERFORMING THE MONTHLY 5FAS R.S. ISOLATION AND COOLING TESTING, CD e

s CNTNMNT ISOLATION SYS + CONT 78-031/03L-0 051878 NTAINMENT ISOLATION VALVE CA-V3 FAILED TO COMPLETELY CLOSE UPON RECEIPT I

8"l O

COMPONENT CODE NOT APPLICABLE 021611 30-0AY OF ITS E.5. SIGNAL.

BECAUSE A REDUNDANT ISOLATION VALVE WAS AVAILABLE.

O

'l SUBCOMPONENT NOT APPLICABLE THERE WAS NO LOSS OF CONTAINMENT INTEGRITY AND THEREFORE, THERE WAS N3 he )l DESIGN / FABRICATION ERROR EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC.

[ 2, 4 O }'vyi.

CONSTRUCTION /IN5TALLATION 0

ITEn NOT AretICABtE V3 MANUALLY CLOSED IN ACCORDANCE WITH T.S.3.6.3.1 THE TOR 00E SWITCH SE j ]d' INCORRECT TORQUE SWITCH SETTING PREVENTED CA-V3 FROM FULLY CLOSING.

CA-t TTING READJUSTED AND VALVE RETURNED TO OPERABLE STATUS WITNIN 4 HOURS AS O

SPECIFIED IN TECH SPECS.

O 4 i e r

tI-TNTdE MILE !$ LAND-2 05000320 042378

!N MODE 1 REACTOR TRIPPED FROM 30% R.T.P.

RCS RAPIDLY COOLED DOWN AND D MAIN STEA9 Sv5TEMS + CONTROLS 78-033/0tT-0 050878 EPRES5URIZED. DURING DEPRESSURIZATION. SAFETY INJECTION WAS TNITIA'ED.

O vAtvES 02:273 2-WEEK RCS r.ND eREsSuRIzER C00tDOWN RATES WEeE EXCEEDED <T.S.

3.

.. Asa 3.4 c

OTHER 9.2).

PRE 55URIZER VOL BELOW LIMITS CF T.S.

3.4.43.

CALCULATIONS AND RA k

i I

"" DESIGN / FABRICATION ERROR DI0 CHEMISTRY SHOW THAT CORE REMAINED COVERED AT ALL TIMES AND NO RELEASE CONSTRUCTION / INSTALLATION OF RADI0 ACTIVE MATERIAL RESULTED.

e p.

O ITEM NOT APPtICABte FOLLOWING RX TRIP. MAIN STEAM RELIEF VALVES DID NOT RESEAT AT CORRECT PR E55URE.

FEEDWATER SYSTEF RE5FONSE SLOW SINCE INITIAL INTEGRATED CONTROL SYSTEM TESTING STILL IN PROGRESS. COMBINAY!ON OF PELIEF VALVE 5 FAILING O

10 RESEAT AN: CONTINUING TO FEED STEAM GENERATORS RESULTED IN RA"!D PLP O

L RE55URIZATION AND C00LDOWN. RV5 WILL BE TESTED.

O O'

i i' ^

O m

T 7

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C cr; 6:.m c=

a D-Q.:

C Z/

CZ SO a

n= q y w w w hh I ^.,.'"1,,*

PAGE 10 I

1 1

THREE MILE ISLAND 2 f-sg!.'

'LER DUTPUT ON EVENTS AT i

FROM 1969 TO THE PRESENT

.I I g) -

AND EVENT DATE OUTPUT SORTED BY FACILITY JUN 25. 1979 EVENT DESCRIPTION /

g

(, g. t.'

~.

e

'V FACILITY /5YSTEM/

DOCKET NO./ EVENT DATE/

CAUSE DESCRIPTIC1 f $ [i

s COMPONENT / COMPONENT SUBCODE/

LER NO./

REPORT DATE/

TO LIFT.

M e

REACTOR TRIP CAUSED SEVERAL MAIN STEAM RELIEF VA VES

+

TYPE CAUSE/CAUSE SUSCODE/

CONTROL NO. REPORT

. " ~ h.d ' g, 'J i

[

STEEL LINERS USED 70 PRO'ECT THE BELLBECAU COMPONENT MANUFACTURER U

IN MODE 1 SEVERAL h

,A

W p-j 05000520 042478 DUE TO INADEQUATE DESIGN.

EVENT PCSED NO THREAT OWS IN THE DISCHARGE PIPINC WERE EJECTED.A4D NO RADIATION WAS RELEASED, M

~

M

" U.l

78-034/01T-0 050878 THIEE MILE 15tAND-2 l'

MAIN STEAM SYSTEMS + CONTROLS 021272 2-WEEK

.(1 SIDE OF THE PL ANT, AND SAFETY OF THE PUBLIC.

+1

+

4 -

t U

VALVES TO THE HEALTH n

et Qf DESIGN / FABRICATION ERROR INADEQUATE DESIGN WHICH Att0WED THE USE OF B yd' A'[

ka OTHER y

g.

p;g 4 p [s,t IN A LOCATION WHER DESIGN THIS EVENT WAS C AUSED BY A'( 180 F/SEC. STEAM VELOCITYTHE UNDER-DESIGNED

,t. Sy

%. j Elt0WS LINERS QUALIFIED FOR (l

ITEM NOT APPLICABLE TO 950 F/SEC. COULD BE EXPERIENCED. E DESIGN.

j BELLOWS LINERS ARE BEING REPLACED BY LINERS OF AN APPROP ft lf "4.,

E VELOCITIES UP IESEt-GENERAT hg,3.1 FCR APPR

t-IN MODE 5. DURING MONTHLY SURVEILLANCE TESTING OF THE

B" D

DIESEL TRIPPED DUE TO HIGH CRANKCASE PRES $URE

' k [/ p c 5 '

6' j.. F '1

- J m

C 05000320 042578 d

)

78-037/03L-O 052578 OR, 32 MINUTES.

TH2EE MILE ISLAND-2 RUNNING FOR 60 MINUTES OR MORE. EVENT POSED NO THREA A SAFETY OF PUBLIC.

AC ONSITE POWER SYS + CONTROLS021609 30-DAY OXIMATELY

%. p.* N -

ED OPERABLE BY CNGINES. INTERNAL COMBUSTION HER DIESEL DPERABLE, SUBCOMPONENT NOT APPLICABLE EILLANCE. I It', j

' 's.

OME WERE P W i i. M i.,

DIESEL GENERATOR WAS CHECKED FOR ANY ABNORMAL PARAMETERS I!!*f s Ii.

OTHER THE DIE 5EL W45 RESTARTED AND SUCCES$FU(LY PASSED SURV NCT APPLICABLE a

h ITEM NOT APPLICABLE CUND.

f CALIBRATION OF

'f,' f J,

N ADDITION.

ND AIR EJECTOR WILL BE INSPECTED.

[

T R ANSFORt*ER

)t IN MODE 5 BURNS 8 ROE NOTIFIED MET ED THAT SINGLE AUXILIARYID t h'

kW.

L 4 4 DPERATION WITHIN THE NORMAL OPERATING RANGE I'9'

/

CONTROLLERS fxy 05000320 050378 I

i',

78-035/01T-0 050978 THKEE MILE ISLAND-2 APPLICABLE 021271 2-WEEK AUXILIARY DEMAND.

NO POTENTIAL FOR ADVE l;:

d 'A -

(

DURING PEPIDD5 0F PEAK UNIT AUXILIARIES.

SY5 TEM CODE NOT A POWER LEVEL REQUIRING MAXIMUM UNITTHE HEALTH AND SAFETY OF T V.

COMPONENT CODE NOT APPLICABLE g) 5UBCOMPONENT NOT APPLICABLE RSE EFFECT ON uy)'

(

ONE TRANSFORMER CAN'T E M '*

A/E SHOWED THAT WITH!N NORMAL RANGE (232 TO 2 OF ENGINEERING SAF OTHER g8'

k

3. I.

NOT APPLICABLE b,

ITEM N3T APPLICABLE ETY FEATURES AND BALANCE OF PLANT AUXILIARIES.

.rf j ha k,

N E ACTIONS EXIST. THE LICENSEE WAS NOTIFIED BY ITS N555 VENDOR THAT TH 6 f.[i '

4 *7 S ARE GREATER THAN s

lb CERTAINTY FACTORS ASSOCIATED WITH THE INCORE DETECTORTHE EXI ON MAY 5.

1978, m

Jt' U

05000320 050578 5

M A5 A RESULT, LIMIT 5 MUST BE REDUCED.

y 3'.. T g } 9 THAT ORIGINALLY CALCULATED.

THREE MILE ISLAND-2 78-036/01T-0 051878 UM INCORE AND OUT-OF-CORF QUADRANT POWER TILTI THERE WAS NO EFFECT ON REACTIVITY CONTROL SYSTEMS 0216i0 2-WEEK

. -,a $

L )* ' J I. '

COMPONENT CODE NOT APPLICABLE m

AND SAFETY OF THE PUBLIC.

BY CBSERVED DPERATIO V

SUBCOMPONENT NOT APPLICABL2

Ne.

THE HEALTH DESIGN / FABRICATION ERROR REEVALUATION PERFORf*ED BY N555 VENDOR BROUGHT ABOUTINCO UPERATING PLANTS.

, K '.

s'j DESIGN C

NAL CHARACTERISTICS OF C

ITEM NOT APPLICABLE APPROPRIATE PROCEDURE CHANGES HAVE BEEN MADE AND AEx15TtNG 4

o EST SUBMITTED TO C0 ERECT h,

J y

O 0t P

I O

O y -

e__. -

C~~3 f:

~3 c=

=

hh

'W qS u

m & c

-u.m.

.-m_.

__4

_m prenwp.

g C3 PAGE st y.

4 ^

/

LER CUTPUT 04 EVENTS AT THREE MILE ISLAND 2 FROM 1969 TO THE PRESENT (b5Ed>s /\\ r? i,?

JUN 25, 1979 CuTruf SORTED sY FAcrtITY AND EVENT DATE p =*[:f(".

C)

L-- J yj,jA FACILITY / SYSTEM /

P. ",a 4~"

COMPONENT / COMPONENT SUSCODE/

DOCKET NO./ EVENT DATE/

EVENT DESCRIPTION /

(pq3 435

[*. W 2

C CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

i CAUSE DESCRIPTION r

r

.e 4

d)

CCMPONENT MANUFACTURER CONTROL NO. REPORT TYPE et e. ' C )^

THREE MILE ISLAND-2 05000320 05t278 PERFORMING MONTHLY REACTOR BUILDING ISOLATION AND COOLING /S AFETY INJECT!

+

p JI '

' [ $. -* ;d CNTNPNT ISOLATION SYS + CONT 78-03&/13L-0 061278 CN SURVEILLANCE. THE SETTING OF BS-PS-3260 GREATER THAN ALLCWABLE VALUE C)

INSTRUMENTATION + CONTR0tS 02i608 30-DAY OF SPEC 3.3.2.i BY o.e2 PSIG. SINCE REDuMDANr PRES $uRe SWITCwES AvAltAs LE AND WITPIN CALIBRATION. NO EFFECT ON HEALTH AND SAFETY OF THE PUDLIC.

c

? Ti b SWITCH L 'f)k OTHER

()

[ i 4 v '

g NOT APPLICABLE 4

()

ITEM NOT APPLICABLE BS-PS-3260 ERROR CAUSED 8 INSTRUMENT DRIFT DURING SURVEILLANCE TIME FREQ UENCY.

COPDECTIVE ACTION TAKEN BY ADJUSTING PRESSURE EWITCH TO A VALUE SELOW THE TECNNICAL SPECIFICATICN TRIP SETPCINT. NO FUTURE ACTICN REQUI 7 'i

()

('.

RED SINCE MONTHLY SURVEILLANCE WILL BE PERFCRMED A5 REQUITED.

)

> ' I WNILE PERFCRMING SFAS REACTOR SUILDING !$0LATION AND C0ct!NG SURVElltANC THREE MILE ISLAND-2 0$000320 052078

() 'k I s, 1978. CONTROL ROOM CHILLER AH-C-83 FAltED 10 OPERAT E TESTING ON MAY 20.

CONT ROOM HASIT8LTY SYS + CONT 78-040/03L-0 061578 SINCE THE REDUNDANT CONTROL ROOM CHILtER WAS CPERADLE, THERE WAS NO L

p-

'a

()

INSTRUMENTATION + CONTROLS 021606 30-DAY E.

EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC.

I

.k SWITCH i

CC"PONENT FAILURE

()

([

MECHANICAL

()

BORG-WARNER CORP.

UPON FAILURE OF AH *-85.

ACTION A WAS ENTERED AND CHILLER RETURNED CPERA 3 f.

BLE STATUS WITHIN REQUIRED TIME.

FAILURE OF AH-C-SB CAUSED BY MICRO SWI TCH WITH ROUGH EDGE ON STEM, PREVENTING PROPER OPER ATION.

ROUGH EDGE RE MOVED AND SWITCH RETESTED OK.

AH-C-8B RETESTED SATISFACTORILY CN MAY 21

()

1

()

1978.

DURING PERFORMANCE OF SURVEILLANCE PROCEDURE 2333-Mt6 "EMEREGENCY DIESEL f

THREE MILE ISLAND-2 0$000320 052078 EMERG GENERATOR SYS + CONTROLS 78-039/03L-0 061578 GENERATOR AND CCOLING WATER VALVE OPERABILITY TEST". THE "B" DIESEL GEN ERATOR FAILED TO START.

SINCE THE REDUNCANT EMERGENCY DIESEL GENERATOR

()

MECHANICAL FUNCTION UNITS 021607 30-DAY AND SAFE WAS OPERASLE. THIS DID NOT HAVE AN ADVERSE EFFECT CN THE HEALTH e

SU?CCMPONENT NOT APPLICABLE TY OF THE PUBLIC, J

1 COMPONENT FAILURE

()

kJ FAIRSANKS MORSE VERTICAL SHAFT BETWEEN UPPER AND LOWER CRANK SHAFTS FAILED DUE TO IMPROPf, MECNANICAL r

ER MATERIAL. A COMPLETE COUPLING OF PROPER MATERIAL WAS INSTALLED AND DF

-X-1B RETURNED OPERABLE WITHIN REQUIRED TIME.

DF-X-tA ALSO INSPECTED.

() f, PROPER MATERIAL USED IN ITS COUPLING.

c E

L' WNILE VERIFYING OPERABILITY OF EMERGENCY DIESEL GENER ATOR *DF-X-1S" FOLL EMEFG GENERATOR SYS + CONTROLS 78-041/03L-0 061578 CWING REPLACEMENT OF VERTICAL SHAFT COUPLING AS IDENTIFIED IN LER 78-37/

f' THREE M!tE ISLAND-2 05000320 052378

(),

PIFES, FITTINGS C2t605 30-DAY L, THE DIESEL TRIPPED CN HIGH CRANKCASE PRESSURI. SINCE THE RECUNDANT D

() e IEStL GENERATOR, DF-X-tA WAS 0* ERA 51E.

THERE WAS NO EFFECT ON TPE HEAtf i

l LESS THAN 4 INCHES H AND SAFETY OF THE PUBLIC.

e DESIGN / FABRICATION ERROR C) j

~~

MANUrACTURING

()

FA!RBANr.S MORSE PARTI ALLY PLUGGED ORIFICE PL ATE TO CRANKCASE VACUUM EJECTCR RES"tTING IN REDUCED CRANKCASE VACUUM Wi!CH HAD BfEN NOTED CN THE DIESEL Pr!OR to TR I

?

IP.

RESTR!CTION REMOVED AND DF-X-tB RERUN TO VERIFY NORMAL CRAN (CASE VA () l CUUM %T FULL LO AD AND AT SYNCHRCNOUS SPEED. PERIODIC CFECKS WILL BE PER

')

FORMED.

O d

==4 23

$c=>

~h (om GD y-

?

Y *..}

N } *-

fr C

l 0

.i JUN 25, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 12

1. % a 3

FROM 1969 TO THE PRESENT CS I f' A f

)*

DUTPUT SORTED BY FACILITY AND EVENT DATE hg O.' /. ' p i '

i*

S s.

FACILITY /5YSTEM/

O [j? z.

COMPONENT / COMPONENT SUBCODE/

DOCKET NO./ EVENT DATE/

Q CAUSE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

g

}

3w COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DESCRIPTION TH. TEE MILE 15 LAND-2 05000320 060978 FLOOR FIRE BARRIER PENETRATION SEAL BETWEEN RELAY POOM AND CONTROL ROCM O[

If,

V COMPONENT CODE NOT APPLICABLE 021980 30-DAY E OPERABILITY OF THE FIRE SEAL. NO THREAT TO HEALTH AND SAFETY OF PUBLI O

h5C'C i

FIRE PROTECTION SYS + CONT 78-043/03L-0 071078 DEFICIENT VIOLATING T.S.

3.7.11.

NO CONDITION EXISTED WNICN RE9UIRED TH 4

a J*

. s..h. i, d.

SU$ COMPONENT NOT APPLICABLE C.

f Ii DESIGN / FABRICATION ERROR

a M*' *g CONSTRUCTION / INSTALLATION O

4,f i;%g ' k 't '4,y :

3 ba

! TEM NOT APPLICABLE IMPROPERLY CURED FOAM MATERIAL WAS USED TO MAKE THE SEAL. CONTINUOUS FI P*

RE WATCH WAS POSTED. DEFICIENT BARRIER REPAIRED AND RETURNED TO FUNCTIO 4

"^t s

US.

(Y(y g '! f. I '$7g,d

g. h f p !

TWEE MILE ISLAND-2 05000320 063078 IN MODE 6. 6/29/78, AT 1430, A DIESEL GENERATOR PLACED IN EMERGENCY STAN t

e EMERG GENERATOR SYS + CONTROLS 78-044/03L-0 072478 DBY.

6/30/78 AT 1600. DI5 COVERED BREAKER G2-1E2 NOT CLOSED WHEN A D.G.

g CIRCUIT CLOSERS / INTERRUPTERS 021936 30-DAY PLACED IN EMERGENCY STANDBY CONSTITUTING VIO!ATION OF T.S.

3.8.1.2.

UNI h

peib CIRCUIT BREAKER T IN MODE 6.

AND NO CORE ALTERATIONS OR CHANGES IN REACTIVILTY WERE MACE DEFECTIVE PROCEDURES THUS EVENT DID NOT EFFECT HEALTH AND SAFETY OF PUSLIC.

f*!

W %j:7 4

$. L* p 4t NOT APPLICABLE O

I *k",,

d

" ;i p/

ITEM NOT APPLICABLE v

PROCEDURE INADEQUAC

Y. PROCEDURE

REVISED TO ENSURE G2-1E2 CLOSED WHEN A

- I '?

t DIESEL GEN 5RATOR 15 PLACED IN EMERGLNCY STANDBY. APPROPRIATE PER$0NNEL WILL BE INjTRUCTED ON PROCEDURE CHANGE.

g

{<

c g

a 1. a 3

5 jf. Q/

THtEE MILE !$ LAND-2 05000320 072478 DURING A FIRE ?*RRIER PENETRATIDH Stal VERIFICATION INSPECTION, A Walt P FIRE PROTECTION SYS + CONT 78-048/03L-0 082278 ENETR ATION WAS FDs.D L ACKING A FIRE BARRIER SEAL.

THIS 12" X 6" PENETRA 3

2 e

D COMPONENT CODE NOT APPLICABLE 022052 30-0AY TION 15 LOCATED IN THE SOUTH WALL OF THE SWITCHGEAR ROCM IN THE A EMERGE O

,kr+'.

SUSCCMPONENT NOT APPLICABLE NCY DIESEL GENERATOR BUILDING. SINCE THIS FIRE BARRIER WAS NON-FUNCTION

,pt

-b, DESIGN / FABRICATION ERROR AL, IT CONSTITUTES A VIOLATION OF TECH SPEC 3.7.11 r 4,l-

,2, e

CONSTRUCTION / INSTALLATION O

g.,J a.

J

~QL u

V ITEM NOT APPLICABLE LACK OF A FIRE BARRIER SEAL IN THIS PENETRATION WAS DUE TO AN OVERSIGHT fty I

ON 1HE PART OF THE CONTRACTOR. A CONIINUQUS FIRE WATCH WAS E%fASLISNED rd 6 "4

)'j' IN ACCORDANCE WITH TECH SPEC 3.7.11 PRIOR TO INSTAltING THE' SEAL AND SUB h

O SEcuENTtY A r!RE BARRIER SEAT WAs ins AttED usING ANI APPR0vED MATERIAt.

O

. : 3.,

kh'i.

s TNAEE MILE ISLAND-2 05000320 081278 DURING PERFORMANCE OF TME REACTOR BUILDING PERSONNEL AIRLOCK LEAK RATE 7

'd VESSEt$, PRES $URE 022389 2-WEEK IT'S TECHNICAL SPECIFICATIONS. ALTHOUGH THE UNIT WA5 IN MODE 5 AT THE T O

>j J * ',.

e CNTNMNT ISOLATION SYS + CONT 78-050/017-0 082878 ESTING, THE OVERAlt AIRLOCK LEAKAGE RATE EXCEEDED THAT ALLCWED IN THE UN h

h. d

',Y CONTAINMENT /DRYNELL IME OF THIS TEST. IT HAD ENTERED MODES 1 THROUGH 4 SINCE THE PRECEDING L n

DESIGN / FABRICATION ERROR EAK RATE TE%TS WERE PERFORMED IN DECEMBER, 1977, AND THUS CONSTITUTES A

+

~

o CONSTRUCTION / INSTALLATION VIOLATION OF TECH. SPEC.

3.6.1.3.5.

i 4

O

.:t cin C

ITEM NOT APetICABLE LEAKAGE WAS CAUSED BY A t/4" HOLE DRILLED THROUGH THE AIRLOCK BULKHEAD D n

I URING INSTALLATION OF SW PORTS FCR THE ELECTRICAL CABLING. A M03ISICATI ON HAS BEEN MADE TO PLUG THE HOLE.

THE AIRLCCK WILL THEN ftE TE51[D AND O

VERIFIED AS SATISFACTORY PRIOR TO ENTRY INTO MODE 4 O

i F

i O.

hI T

. _ _ _ _ ~.___ __ __

C ~'

<==G n

e=2.=3 c.cma n r-n

= _m

(=pd

A CQ QC MFW"" "

t

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P kL ]

s W.J i

D'g' f6 PAG

13 cm p~ I h, 3.' -

s i

EVENTS AT THREE MILE ISLAND 2 E-a- $

( Ld b

LER OUTPUT 04 t969 TO THE PRESENT L-4 i '

FROM OUTPUT SCRTED BY FACILITY AND EVENT DATE F $

JUN 25. 1979 h,

' ' M ':

.3

' O 'a-gJ FACILITY / SYSTEM /

DOCRET NO./ EVENT DATE/

EVENT DESCRIPTION /

l ~~~~$

, ii LER NO./

REPCRT DATE/

CAUSE DESCRIPTION COMPONENT / COMPONENT SUSCODE/

'./>

+1 TYPE ADE INSID h,

47 U-CCMPONENT MANUFACTURER WNILE THE UNIT'S A/E WAS CONDUCTING A REV7EW OF CABLE $PtICES M CAUSE/CAUSE $U5 CODE /

CONTROL NO. REPORT SAFETY RELATED VALVL5 013

. +C ?

05000320 082478 IT WAS DISCOVERED THAT CERTAINTHE TMI-2 F54R. BUT WERE INSTEAD o ' d..

f TH;EE MILE 15 LAND-2 78-05t/017-1 091978 E CONTAIN9ENT.

HAVE CABLE SPLICE 5, A5 INDICATED IN INSTALLED.

l9 CONNECT ED T O TER91NAL BLUCr.5 As INITI ALLY NOT SYS REQRD FOR $AFE $HUTDOWN 022390 2-WEE (

4 'i' o

t'

g '. '

t h,'

VALVES f' d p

OTHER CAltES REQUIRING

'0DIFICATIONS PERFCR*ED.$PLICED AND FITTED WITH

$*dg.,6 PER50NNEt ERRORA CONSULT. PERSONNEL CABLES OVERLOOKED BY THOSE REGUIRED FOR NE ATUpREQUIRING $PLICING AND H d

9 s

A/E WNEN q

CONTRACT.

"J '

E f O'

ITEM NOT APPLICASLE SPLICING IDENTIFIED.

x SNRINK TUSING PRIOR TO HEATUP.

REMAINDER SHRINCING ACCOMPLISHED PRIOR TO CRITICALITY, HEAT I'

D3't ST EAT IT WAS DETERMINED BY THE UNIT'S A/E TH AT THE MAIN T" ;ai FRCM t 0 0': PO g

E AM LINES WOULD SE INC AP ADLE OF WITH5T ANDING A TURSINE TRIP O

04 AUGUST 28, 1978.

O 05000320 082878 TUR5!NE TRIP At 30 PCW

/

SINCE THE P0wtR tEvEt NEvEe EXCEEDED 30 78-052/01T-0 09t:78 THAEE MILE !$tAND-2

..% j STEAM LINES COULD WITH5TAND ATHE PUBLIC WA$ NOT AFFECTED.

fdi STEAM SYSTEMS + CONTROLS e22388 2-WEEc WER.

CWED THAT THE MAIN

AIN O

IPES. FITTINGS THE HEALTH AND SAFET) 0F f6 INCHE5 AND 1ARGER ER.

O y%

D E OF SUPPR

(

DESIGN / FABRICATION ERROR THE PREVIOU5tY INSTALLED MAIN STEAM RESTRAINTS WERE NOT CAPA3t

,.}

4 a

CESIGN VALVE 5 WITHIM O

ITEM NOT APPLICABLE ESSING CLO5URE OF THE TURBINE STOPSIZED RESTRAINTS HAVE BEEN INSTALLED.

RAME AT 100% POWER.

PROPERLY O 7J; INSTRU*ENTATICH DI h

h IN MODE 3. DURING MAINTENANCE WORK 04 REMOTE SNUTDOWNGROUNDED C AU ss PATCH PANEL. PANEL POWER SUPPLY INADVERTENTLY POINTS CCULD O

1.

O 05000320 083078 REQUIRED BY T.S.

3.3.3.5.

ALL 5 0F DISPL AY INSTRUMENT ATIONP ATCHYJ ARD USING DVM.

BECAUSE UNIT $HJTDOWN. AND LOS

.y' SPLAY 78-D57/03t-0 092978 THREE MILE 15tAND-2 If SAFETY RELATED DISPLAY INSTR NEEDED AT THE TI"E. EVENT DID NOT ENDANGER PEALTH I"

CCDE NDT APPLICABLE 022651 30-DAY HEVE BEEN READ AT 4 :

SUSCOM*0NENT NDT APPLICABLE T INSTRUMENTATION NOT O

COMPONENT O

AND S AFETY C' THE PUBLIC.

$UPPL f.

PER5ONNEL PERFORMING MAINTENANCE WORK INADVERTENTtY CROUN PERSONNEL ERRORREPAIR PERSONNEL RESULTING IN DA* AGE TO l

MAINTENANCE &

PATCH PANEL INSTRUMENTATIONCCRRECTIVE ACTICM W%5 REPLACEMENT i

O ITEM N0' APPLICAntE 70 REMDTE $NUTDOWNIN VITAL SUPPLY 2-5V.

Y BREAKER CIRCUIT 0F DAMAGED CIRCUIT BREARER.

STEAM RELIEF VAtVE TESTING.

Y, WNILE IN MODE 3, AND COOLING DOWN AFTER MAINTRIP WHEN PEES $URE WAS REDUCED SELOW e {E -

eEeUNrANT CHAtN:ts A t

0 7 8-0 5 3 / 0 3L-0 092678 SAFETY INJECTION CHANNEL C DID NOT 05000320 083178 THE 1640 PSI SETPOINT. AS RtCUIRtD nY T.s.

3.3.2.

THEREFORE. THIS EVENT POSED $3 THREAT TO TH THREE MILE 15 LAND-2 ENGNRD 5 AFETY FEAYt INSTR SYS 022387 30-DAY AND 6 FUNCTIONED PROPERLY.

THE PUBLIC.

f O

IN5fev*ENTATION + CONTR0ts E HEALTH AND SAFETY OF O

(

OTHER ASSOCIATFD WITH S AFETY C C O N E N T FAltCRE e

6631500)

TRIPPr3 35 p

~

ELECTRONIC FAILURE OF THE BI-STA9tE (BAltY PART NO.

DISCOVERY CHANNEL C WAS MANUAttYBI-ST A5LE WAS RE O

O SAILEY METER CC*PANY INJECTION CHANNEL C.

UPON 3.3.2.

THE FAU;TY REQUIRED BY T.S.

RETURNED TO OPERA 5LE STATUS.

I oj" Q

t o

- - - - )-

r:#,

S wb c===

u O T

(h JUN 25. 1979 LER OUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 14 e ' ] t s}

^

FROM 1969 TO THE PRESENT

.O 5

4

%pa$

nV OUTPUT SORTED BY FACILITY AND EVENT DATE ri (q '

a FACILITY / SYSTEM /

p L +30 d* /l (E g [ N(.{ 7 COMPONENT / COMPONENT SUBCODE/

DOCRET NJ./ EVENT DATE/

5 C*USE/CAUSE SUBCODE/

LER NO./

REPORT DATE/

EVENT DESCRI' TION /

M s..

rj.

O COMPONENT MANUFACTURER CONTROL NO. REPORT TYPE CAUSE DE5CRIPTION THIEE MILE ISLAND-2 05000320 090778 WHILE IN MODE 5. DURING COMPLETION OF A CHANGE MODIFICATION ON CONTAIN.

h4 CNTNMNT ISOLATION SYS + CONT 78-054/03L-0 092778 150 VALVE DETERMINED THAT WDL V 271 NAD NOT BEEN SUPPLIED WITN CONTAINME jg ;... -

U VALVES 022386 30-DAY NT GRADE LIMIT SWITCHES. TOROUE SWITCN AND MOTOR.

BECAUSE THE P'DUNDANT i

f ?.. '. (

n

~

OTHER ISOLATION VALVE WA5 OPERABLE. THE HEALTH AND SAFETY OF T H E P U'

.C WAS N 7

9 ' V *!*,*ft i ' 'f,

O i

PE"tSONNEL ERROR OT ENDANGERED.

1.. 'j gl CONTRACT. A CONSULT. PERSONNEL i

n 4

U ITEM NOT APPLICABLE PURCHASING ERROR BY UNIT A/E.

NON-CONTAINMENT GRADE COMPONENTS USED ON 1

,f OPERATOR OF WDL V 271 COMPONENTS REPLACED WITN CONTAINMENT GRADE AND V

%N ' t i

ALVE RESTORED OPERABLE. ALL OTHER SAFETY RELATED MOTOR-OPERATED VALVE 5

'# l. _ /

U INSIDE CONTAIN. BEING INSPECTED.

O r.i ?

fs

]? b )] ; f - :

TH;EE MILE ISLAND-2 05000320 090878 IN MODE 5 DURING MONTHLY REACTOR BUILDING ISOLATION AND COOLING FUNCTION i

CNTNMNT ISOLATION SYS + CONT 78-058/03L-0 100478 AL TESTING. CONTAINMENT ISOLATION VALVE WEDL-V1125 FAILED TO CLOSE ON MA D

VALVES 022385 30-DAY NUAL INITIATION TEST SIGNAL. VAtVE DID CLOSE ON SUBSEQUENT AUTO ACTUATIO J.f*W(H

'N Q,,1 ". j OTHER N LOGIC TEST 5IGNAL AND SUBSEQUENT MANUAL INITIATION TEST SIGNALS. No TH t

OTHER REAT TO PUBLIC HEALTH AND SArETY.

2-t

e au NOT APPLICABLE t-,v *

%()

ITEM NOT APPLICABLE BECAUSE FAILURE OF WDL-V1125 TO CLOSE COULD NOT BE REPEATED 04 SUBSEQUEN l e gy-M. <

4A

/..

T MANUAL OR AUTO ACTUATION TEST 5!GNALS BELIEVE THIS EVENT CAUSr0 SY DIR

,f.q.th<.w%

(

TY CONTROL RELAY CONTACT. AFFECTED RELAY CONTACT CLEANED A5 A PRECAUTION U

ARY MEASURE.

7.R a,

f

' h.k., 6 'k [*

TN;EE MILE ISLAND-2 05000320 090878 INVESTIGATING COMPLIANCE WITH IE CIRCULAR 78-08. FOUND ORIGINAL BOLTED C CNTNMNT ISOLATION SYS + CONT 78-059/03L-0 100278 CNNECTIONS ON CONTAINMENT ISCLATION VALVES MU-V2A/B NOT TAPED IN ACCORDA f

,.. Cd D

VALVE OPERATORS 023076 30-DAY NCE WITH ENVIRONMENTALLY QUALIFIED METHODS. SINCE EQUIP"ENT HAD NOT FAI T "C(

3 ELECTRIC MOTOR - AC LED, AND h3 SITUATION OCCURRED WHICH COULD HAVE PRODUCED ADVERSE ENVIRON e

PERSONNEL ERROR MENTAL CONDITION NECESSARY TO CAUSE COMPONENTS TO FAIL, NO DANGER TO PUB i.

CONTRACT. 8 CONSULT. PERSONNEL LIC HEALTH AND SnFETY.

I}n)

O ITEM NOT APPLICABLE PERSONNEL FRRCN DURING CONSTRUCTION ALLOWED TAPING OF BOLTED CONNECTIONS i

IN NCN-ENVMONMENTALLY QUALIFIED MANNER.

MOTOR LEADS WERE BUTT SPLICED 6

TO FIELD WIRING AND Q VERED WITH ENVIRONMENTALLY QUALIFIED HEAT SNRINT i

C TUBING.

INVESTIGATION REVEALED NO OTHER ERRORS OF THIS TYPE.

O

[,, i,

TH;EE MILE 15 LAND-2 05000320 091378 WHILE IN MODE 5. DURING PERFORMANCE 0* SURVEILLANCE 2333-05. DAMPER 4092 f*I

~r AIR COND. HEAT. COOL. VENT SYSTEM 78-055/03L-0 100578 C (REQUIRED TO BE OPERABLE IN MODES

-4) FAILED TO RESPOND TO A CLOSE 5 U

VALVES 022652 30-DAY IGNAL.

BECAUSE NO CONDITION EXISTED AHICN REQUIRED CPER ATIO*4 0F THE CON D

l' ?

i BUTTERFLY TROL ROOM EMERGENCY VENTILATION 5YSTEM. THIS EVENT POSED NO THREAT TO TH DESIGN / FABRICATION ERROR E HEALTH AND 5AFETY OF THE PUBLIC.

3,

~~

pr CONSTRUCTION / INSTALLATION O

1 D

ITEM NOT APPLICABLE DRAWING MIS!NTERPRETATION RESULTED IN IMPROPER ORIENTATION OF CERTAIN CO MPONENTS IN INSTRUMENT AIR TUBING.

THIS CONSTRUCTION PROBLEM CORRECTED s

ALL AIR-CPERATED DAMPERS IN CONTROL ROCM EMERGENCY AIR MANDLING SYS?LM C

INSPECTED. ALL OPERABLE. REVIEW OF AIR HANDLING SYSTEM DESIGN FOUND NO

(

S. PROCEDURE

2102-1.1 WILL BE REVISED TO PREVENT RECURRENCE.

O

?, !!.

U TH' TEE MILE ISLAND-2 05000320 120278 WNILE IN MODE 1 CN DECEMBER 2.

1978. WHILE SWITCHING FRO *1 THE STARTU* TO

. ; 3 C.

a-MAIN STEAM SYSTEMS + CONTROLS 78-069/99X-0 022879 THE MAIN FEEDWATER REGULATING VALVES, A REACTOR TRIP OCCURRED FOLLOWED BY SAFETY INJECTION ACTUATION DUE TO OVERFEEDING THE STEAM GENERATORS.

O t i #

h.',

J VALVES 023543 OTHER m

SINCE SAFEff FEATURE SYSTE"S FUNCTIONED AS DESIGNED. THIS EVENT DID NOT e'.A

'i GATE AFFECT THE HEALTH AND SAFETY OF THE PUBLIC.

a DEFECTIVE PROCEDURES O

f

,?~

NOT APPLICABLE U

ITEM NOT APPLICABLE THIS EVENT OCCURRED DUE TO ThE MAIN FEEDWATER REGULATING VALVE BEING PIN f'

n NED OPEN.

PROCEDURES HAVE BEEN REVISED To PRECLUO PEOCCURRENCES.

O O' t,

O TN7EE MILE ISLAND-2 05000320 120878 04 DECEMBER 8.

1978. IT WAS DETERMINED THAT THE CONTR0t LOGIC FOR THE MA REAC CCJL CLEANUP SYS + CONT 78-071/01T-0 122178 KE-UP (HPI) PUMPS ALLOWED TWO PUMPS TO START ON A SINGLE DIESEL GENERATO 023428 2-WEEK R DURING LOSS OF OFFSITE POWER WITHOUT ESF ACTUATICN. SINCE AD"!NISTRAT r

O PUFPS IVE CCHTROLS WERE IMMEDIATELY APPLIED THERE WAS NO EFFECT ON THE HEALTH OTHER AND SAFETY OF THE PUBLIC.

{

8 DES!CN/ FABRICATION ERROR O

DESIGN nO ITEM NOT APPLICABLE A DESIGN DEFICIENCY IN THE CONTROL LOGIC WHICH COULD HAVE Att0WED THE ST ARTING OF TWO MAKEUP PUMPS FRCM A SINGLE DIESEL GENERATOR WAS CCTRECTED.

THE DESIGN MODIFICATION REVISED CONTROL CIRCUITS TO PREVENT THIS FRC'1 O

OCCURRING.

O TNAEE MILE 15 LAND-2 05000320 121373 PERFOR*11NG SURVEILLANCE PROCEDURE 2303-M35. CONTAIN"ENT ISOLATION VALVES C r4 T NMN T ISOLATION SYS + CONT 78-072/03L-0 010279 RR-V2A. RR-V25. CF-V144 AND SV-V54 F AILFD TO CLOSE ON AUTOMATIC ACTUAf!

O REtAYs

02352, 30-DAY ON Test SIGNAt.

THIS Is a v!0tATION OF T.s. 3.3.2.1 WHICH et0UIRts 'WD O

MINIMUM CPERABLE CHANNELS IN MODES 1 THROUGH 4 REDUNDANT VALVES WERE O CONTFOL. GENERAL PURPOSE PERABLE FOR THE AFFECTED PENETRATIONS; THUS NO EFFECT CN PUSLIC NEALYN A

"" COM*0NcNT FAILURE HD SAFETY.

O MECHANICAL

+

O SMITH.

A.

O.

THE A30VE LISTED VALVES DID NOT RECEIVE THE TEST SIGNAL PECAUSE ACTUA'IO N LOGIC RELAY 6321B/RStA WA5 INOPERABLE. REL AY W's DIS AS5"'MLT.ti C' t " O S

AND ALIGNED.

SEVERAL MANUAL AND ELECTRICAL OPERAT!cNS Ul u THEN rr fry O !

MED SUCCESSFULLY. NO FUTURE CORRECTIVE ACTION 15 CONSIDtt w NtCT.5'. ev.

O O

C.

r i

1

a-C7

&=24 3

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,mp4-.y w 1--

s-JUN 25, 1979 LER OUTPUT Cr EVENTS AT THREE MILE ISLAND 2 PAGE 18 O I

FROM 1969 TO THE PRESENT

$1 bn CUTPUT SORTED BY FACILITY AND EVENT CATE (C t")

W@ M-FACitITY/ SYSTEM /

COMPONENT /CCMPONENT SUBCCDE/

DOCKET NO./ EVENT DATE/

\\ ~~

CAUSE/CAUSE SUSCODE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

h COM*0NENT MANUFACTURER CONTROL NO. REPCRT TYPE CAUSE DESCRIPTION

@k" 3

TNTEE MILE ISLAND-2 05000320 121578 AT 0800 NOURS ON DECEMBER 15. 1978. THE AIR PUFP FCR H'-R-227 W A$ FOUND AwEA MONITCRING SYSTEMS 78-073/03L-0 0t1579 TO BE SE! ZED. CAUSING HP-R-227 70 DE INOPERABLE.

$14CE REACTOR DUILDING S

O[

gd PUMPS C23431 30-DAY GRAB SAMPLES WERE TAKEN EVERY 24 HOURS. AS S*ECIFIED 3Y TECH. SPEC. 3.4 VANE TYPE

.6.1 1HIS EVENT DID NOT AFFECT THE HEALTH AND SAFETY OF THC PUBLIC.

i b

DESIGN / FABRICATION ERROR O

s DESIG't WATER IN SAMPLE LINES TO AIR PUMP APPEARS TO BE CAUSE CF SE!ZURE. PUMP l

GAST MANUFACTURING CORPORAT!cN e

REPLACED HEAT TRACING APPLIED TO SAMPLE LINES AND HP-R-227 RETURNED CPER 9

4 O

. ; }'

ABLE.

ENGINEERING EVALUATICN BY A/E REQUESTED TO DETERMINE METHOD OF P r.

F,,,

g EVENTING WATER IN SAMPLE LINES.

IN THE INTERIM PERICDIC CHECKS WILL SE THREE MILE ISLAND-2 05000320 122878 LE IN MODE 1 DURING A PERIODIC DIESEL-GENERATOR SURVEILLANCE. DIESEL

!e*

D

.N' AC CNSITE POWER SYS + CONTROLS 78-074/03L-0 012379 GENERATOR DF-X-1B DID NOT START THERE3Y CAUSING THE ACTION SitTEMENT ASS O

FILTERS 323430 30-DAY OCIATED WITH T.S.

3.8.1.1 TO BE ENTERED.

SECAUSE NOR*AL POWER WAS AVAIt.

AstE AND SECAUSE THE OTHER SFAS STRING AND ITS POWE' SUPPLY WAS AVA!LASL pT f'I SUBCCMPONENT NOT APPLICABLE CCMPONENT FAILURE E. THE EVEN! DID NOT AFFECT THE HEALTH AND SAFETY OF THE PUBLIC.

8

'(-,

NATURAL END OF LIFE O

'i i

b NUGENT. WM W.

C0 EVENT APPARENTLY CAUSED BY A PARTIAttY CLOGGED FUEL OIt FILTER. THE FIL TER REPLACED AND CF-X-15 DEMONSTRATED OPERABLE IN ACCORDANCE WITH ACTI"4 i,

STATEMENT REQUIREMENTS. IN ADDITION DIESLL GENERATOR SURVEILLANCE rREQ O*

O UENCY WAS INCREASED IN ACCORDANCE WITH TMI-2 T.S.

YNREZ MILE ISLAND-2 05000320 010379 CN 01-03-79 IN MODE 1 DETERMINEu ;L?"*TLLANCE PROCEDURE 2304-W1 BqRATED M

I REACTIVITY CONTROL SYSTEMS 79-006/03L-0 013179 WATER SOURCE VERIFICATION %CHEDULED 'OR 31-02-79 HAD NOT BEEN P E R F 0 5"* E D.

O

?

b CC-PCNENT C00E NOT APPLICASLE 025008 30-DAY THIS IS a VIOLATION OF T.S. 4.1.2.9 AND 4.5.4.

SINCE SWST WAS ft"EDIA A

SUSCOM*0 MENT NOT APPLICA3LE T El.Y CHECKED AND FOUND WITHIN ALLOWABLE LIMITS. NO EFFECT ON PUBLIC NEAL a

i TH AND SAFETY.

PERSCSNEL ERROR e

RADIATION PROTECTION PERSONNEL O

d ITEM NOT APPLICABLE BWST WAS IMMEDIATELY SAMPLED AND ANALYZED FOR REQUIRED CONCENTRATION. I NSTRUCTION OF PERSONNEL ON SURVEILLANCE VERIrICATION TECHNIQUES HAS TAKE g s g ' (

N Pt. ACE TO ASSURE THAT THIS EVENT DOES NOT RECUR.

e g

l THIEE MILE ISLAND-2 05000320 010479 OH 1/4/79 REVIEWING DATA COLLECTED DURING PERFORMANCE OF 2303-M7 CN 12/1 f fe CNTNMNT HEAT REMOV SYS + CONT 79-001/03L-0 020f79

/78 DETERMIAED REACTOP BUILDING PRESSURE NI-HI CHANNFL A FUNCTIONU. TEST i

O INSTRUMENTATION + CONTR0t$

O25005 30-DAY NDT rEer0RMED v!OtATING T.S. 5. 3. 2. i. i. $1NCE R0 PEES $uet HI-HI CHANNE O,e L A FUNCTIONAL TEST WAS PERFORMED SATISFACTORILY CH 90TH tt/tL478 AND t/

INDICATOR 5/79 SYSTEM WAS NOT OPERATING IN DEGRADED MODE AND THERE WAS NO EFFECT 0

. J i i

~~

PERSONNEL ERROR 1

M PUSLIC HEALTH AND SAFFTY.

O "AINTENANCE & REPAIR PERSONNEL O

ITEM NOT APPLICABLE A SECTION OF SURVEILLANCE PROCEDURE 2303-M7 WAS INADVERTENTLY CM*ITED BY TECHNICIAN WHO PERFORMED SURVE!LLANCE CH 12/1/78.

APPROPRIATE Itc rERS ONNEL WILL BE ADVISED OF THIS EVENT TO PREVENT A FUTU3E RECUURENCE.

O; O

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JUN 25, 1979 LER CUTPUT ON EVENTS AT THREF MILE ISLAND 2 PAGE 19

,.m.d FROM 1969 TO THE PRESENT

<c; O

H O

CUTPUT SCRTED BY FACILITY AND EVENT DATE

-C b

@ Q:

FACILITY / SYSTEM /

V L

CCMPCNENT/COMPCdENT SUSCODE/

DCCKET NO./ EVENT DATE/

3 CAUSE/CAUSE SUBCCCE/

LER NO./

REPORT DATE/

EVENT DESCRIPTION /

M' 2'D O

COM ONENT MANUFACTURER CONTROL NO. REPCRT TYPE CAUSE DESCRIPTICN p

THREE MILE ISLAND-2 05000320 010579 AT 0 957 CONTROL RCD 6-12 DROPPED INTO THE CORE.

ICS I"*EDIATELY BEGAN Y REACTIVITY CONTROL SYSTEMS 79-003/03L-0 020279 0 REDUCE PCWER TO APPROXIFATELY 584.

AS A RESULT OF DROPPED ROD BOTW QU O

CCMPONENT CODE NOT APPLICABLE 025005 30-DAY ADRANT POWER TILT STEADY STATE t!MIT AND TRANSIENT LI"If WERE EYCEED5D.

O

f. '

SUBCCM*CNENT NOT APPLICA5LE STEADY STATE AND TRAN5IENT QUADRANT PCWER T IL T S WERE F ETURN ED T O 14tCWA OTHER BLE LIMITS SY 1032.

As MAXIMUM TILT LIMIT WA5 h0T EXCEEDED REAf70v PCWE NOT A'PLICABLE R RAN-BACK AS DESIGNED IND ALL SYSTEM 5 FUNCTIONED PRCPERLY.

h3 EF ECT 0 D

ITEM NDT APPLICABLE N PUBLIC HEALTH AND SAbtTY, O

i BtCWN FUSE C4 B PHASE FOR CR 6-12.

FUSE WAS REPLACED AND ACCEPTABLE VOL TOAGE AND CURRENT MEASUREMENTS CSTAINED. SHUTDCWN MARGIN VERIFIED ABOVE

( *:'

2*; DELTA K/K AND QUADRANT POWER TILI MONITCRED HCURLY FCR 12 9035.

RO p

4 O

D RESTORED CPERABLE WITHIN ONE HOUR AND QUAORANT PCWER TILT RES?CRED WIT O

,i HIN 30 MINUTES.

i VHREE MILE ISLAND-2 05000320 010579 PERFORMING REACTOR BUILDING SPRAY PUMP FUNCTIONAL TEST AND VALVE ODERABI

+

[

OTHER ENGNRD SAFETY FEATR SYS 79-004/03L-0 020279 LITY TEST. CCNTROL ROCM INDICATION AN3 OPERATCR OBSERVATICN WERE NOT IN u

VALVES C25006 30-DAY AGREEMENT CONCERNING POSITION OF BS-V-15. SYSTEM DECLARED IN0PERA3tE AND O

n i, b' GLOBE ACTICN STATEMENT OF T.S.

3.6.2.1 ENTERED.

SECAUSE REDUNDANT BLOG. SPRA CC"?CNENT FAftURE Y SYSTEM AND REACTOR BLDG. EMERGENCY CCOLING SYSTEM WERE CPERABLE. NO E MECHANICAL FFECT CN PUBLIC HEALTH AND SAFETY.

f-ALOTCO. INC.

O Ci

.tg s.

FURTHER INVESTIGATION REVEALED DISAGREEMENT CONCERNING VALVE P05! TION WA

$ DUE TO A BENT VALVE STEM.

MODIFICATICNS WERE MADE TO ALLOW VALVE CPER

'3 ATOR TO FUNCTION CN STRAICHT PORTION OF THE STEM.

VALVE WAS RE-ASSEMBLE

?.

[

D. STRCKE TIME TESTED AND DECLARED OPERABLE. IN FUTURE SPACER BETWEEN VA O

h6 LVE AND OPERATOR WILL BE REMOVED AND STEM REPLACED.

9 THREE MILE ISLAND-2 05000320 010879 IN MCDE 1 LEAKAGE WAS REPCRTED IN T5dT VICINITY CF OH-R-95.

INVESTICATID Vi EE51 DUAL NEAT REMOV SYS + CCNT 79-005/03L-0 020279 N5 REVEALED A SMALL CRACK IN A PIPING WELD JUST UPSTRE AM OF THE V ALVE.

+

[.'

PIPES FITTINGS 025107 30-DAY REPORTABLE PER T.S.

6.9.1.9.D.

EFFLUENT WAS SAMPLED ANO ACTIVITY W45 LE O

i NO SUBCOMPONENT PPOVIDED 55 THAN MINIMUM DETECTABLE LEVEL. THUS NO EFFECT CN PU3LIC HEALTH AND 5 COMPCwENT FAILURE AFETY.

I MECFANICAL C

ITEM NOT APPLICABLE O

EVENT CAUSED BY A CRACKED WELD WHICH RESULTED FRCM VI9 RATION. CCRRECTIV

'i E ACTION TAKF" TO MINIMIZE LEAKAGE.

SUB5EQUENTLY THE CRACKED SECTION OF t

PIPING WAS WLLD REPAIRED.

AE IS EVALUATING IF ADDITIONALrP!PE HANSERS Q

ARE PEQUIRED TO REDUCE VIBRATION.

O VHREE MILE ISLAND-2 05000320 OT1779 DURING INSPECTION OF EQUIPMENT & CABLES IN CONTROL BUILDING AREA ON '/17 ENCNRD SAFETY FEATR INSTR SYS 79-00E/03L-0 020979

/79 DISCOVERED SETPOINTS OF 2 FEEDWATER LINE RUPTURE DETECTION P'E!$URE O

INSTRUMENTATION + CONTR0t5 025505 30-DAY SWITCHE5 crW-DAIS-7ss3-i a rW-DeIS-7ss3-2 OuTSIDE r.5. AttCW ABtt tIMIr5 r)

S tit T CN SPECIFIED IN SECTION 3.3.2.1 (196 PSID V5 192 P51D).

NO EVENT eCCURpCD

(

~ OTHER SUBSEQUENT TO OUT-OF-TOLERANCE CONDITION OF SWITCHES WNICN k?Ut? Havt R t

HOT APPLICABLE EQUIRED TNEM TO BE CPERASLE. AND SINCE VARIANCE FRCM LIMIT WAS CNLY 2'; N i

O BAeTON IN5feu CO., DIv OP ITT 0 EFFECT CM PUBLIC HEALTH AND SAFETY.

h INSTRUMENT SETTING $ MAY HAVE CHANGED FR09 INSTRU*ENT ORTFT CR STEAM (EAR S;.

ALIBRATION OF THESE INSTRUMENTS W!lt BE CHECKED IN FUTURE TO DETE RMINE DRIFT CHARACTERISTICS. PRESENT PLAN IS TO RE*L'.CE SWITCHL5 CUU NG i

'j FEErWATER ISCLATION MODIFICATION SCHEDULED FCR FIRST REFUELING.

SWI'CN O

+g ES RECALIBRATED AND TESTED SATISFACTORILY.

{

t b

6 O

7

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I

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$$9 Y f Q<lf r AA g b -h V Q

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JL'N 25, 1979 LER DUTPUT ON EVENTS AT THREE MILE ISLAND 2 PAGE 2 & I 1

7 b

t

'3 FROM 1969 TO THE PRESENT (CQ~ 3 ' '"

75

'd OUTPUT SORTED BY FACILITY AND EVE *4T DATE r

FACILITY / SYSTEM /

l e'

COMPONENT /COM*0NENT SUSCODE/

DOCXET N0./ EVENT DATE/

CAUSE/CAUSE SUSCODE/

LER NO./

REPCRT DATE/

EVENT DESCRIPTION /

O Lf 4

CO*PONENT MANUFACTURER CONTR01, NO. REPORT TYPE CAUSE DESCRIPTION g *iIf'

. g !:

it THTEE MILE ISLAND-2 05000320 012679 IN MODE 5 TRAVELLING WATER SCREENS WERE FOUND IMOPERABLE.,DUE TO SIONIFIC a

4 j

' l" STATION SERV WATER SYS + CONT 79-007/031-0 022679 ANT BUILD UP OF DEBRIS CAU5ING A HIGH DIFFERENTIAL LEVEL ACROSS THE IOLE m.,f.%3,.'.

U COMPONENT COD 5 NOT APPLICABLE 025343 3D-DAY SCREEN SYSTEM.

BECAUSE NO EVENT CCCURRED WHICH REoulRED EMERGENCY USE

' C t.

SUBCCMPONENT NOT APPLICABLE OF RIVER WATER SYSTEMS AND BECAUSE SUFFICIENT FLOW TO THE RIVER WATER PU DEFECTIVE PROCEDURES MP IN OPERATION AT THE TIME EXISTED. THIS EVENT DID NOT HAVE AN ADVERSE

t 9 "Ti ' a a

". D 'l

t.,

NOT APPLICABLE EFFECT ON THE HEALTH AND SAFETY OF THE PU MIC.

I'

'/

f 6 D

ITEff NOT APPLICABLE T *s % 1 PROCEDURES DID NOT REQUIRE ONE OF THE SCREENS TO BE CONTINUOUStY CPERA9(,

I c

1.<N'4 ' '

(i :

~

E DURING PERIODS WHEN LARGE AMOUNTS OF DEBRIS ARE PRESENT IN THE R!v'R.

U#

7 AFFECTED SCREENS WERE CLEANED AND RETURNED TO SERVIC

E. PROCEDURE

S TO 8 E CHANGED TO ENSURE AT LEAST ONE SCREEN REMAIN 5 IN CONTINJ005 SERVICE Du 1-

,s(y j / ' N{ '

RING PERIODS OF HIGN DEBRIS ON THE RIVER.

g k'r.r. '

'C TH;EE MILE ISLAND-2 05000521 015079 PREPARING TO' ENTER MODE 4 FOUND THAT SURVEILLANCE REQUIRED BY T.S.

3.f.2

^

X E 510U A l. HEAT REMOV SYS + CONT 79-009/03L-0 022679

.1 FOR MODE 5 HAD NOT BEEN PERFORMED AFTER MAKEUP PUMPS NAD BEEN TACGED 4

O COMPONENT CODE NOT ArettCABtE 025333 30-uaY Oui SusSEcuENT TO ENTRY INTO M0cE 5.

sECAuSe NO C0ee AtTEeArIONS WtRE P 1 *5 " D SUSCOMPONENT NOT APPLICABLE ERFORMED CR POSITIVE REACTIVITY CHANGES MADE, THIS EVENT DID NOT HAVE AN

)

DEFECTIVE PROCEDURES ADVERSE EFFECT ON THE HEALTH AND SAFETY OF THE PUBLIC.

L 4*

L NOT APPLICA8LE

@ At5 g' i O

rTEPT NOT APPLICABLE LACK OF CLARITY IN THE SHUTDOWN PROCEDURE WHICH DID NOT ADEQUATELY SPEC 1 9 L-

'M C f '

FY PERFORMANCE OF THIS EVENT RELATED SURVElttANCE. THE SURVEILLANCE PRO

' m O

wN rROCEDuRE wItt ne REVISED TO CLARtFY HEED TD VERIFY VALVE LINE-UP FOR 13 p[A CEDURE WAS COMPLETED S ATISF ACTORILY AND UNIT EN1ERED McDE 4.

THE SHUTD3 c i C

J.V.1 " *b '; & **

f BORON INJECTION FLOW PATM WHILE IN MODE S.

l

,/

{h.y THREE MILE ISLAND-2 05000320 021479 WHILE IN 1*0DE 1 FOUND BORON CONCENTRATION IN THE BORIC ACID MIX TAN 4 WAS 3'

REACTIVITY CONTROL SYSTEPf3 79-010/DfT-0 022679 GREATER THAN THAT REQUIRED BY T.S.

3.1.2.9 AND THAT THE LCO ACTION STAT O

COMPONENr CODE NOT APPtICABLE 025334 2-WEEK EMENT HAD NOT BEEN INVOKED. BECAUSE A REDUNDANT SCURCE OF 50't0'4 WAS AV A "t.

t' i

SU8 COMPONENT NOT APPLICA5LC ILABLE AND BECAUSE NO EVENT OCCURRED WHICH REQUIRED BORON INJECTION, THI i-' 'Q g, f..

PER$0NNEL ERROR S EVENT DID NOT ADWERSELY AFFECT THE HEALTH AND SAFETY OF THE PU3(IC.

'y.-

. i< r LICENSED a SENIOR OPERATOR 5 t m O

ITtM NOT APetICAstE CY.

~ -

THIS EVENT W AS C AUSED BY UNIT PERSONNEL FAILING TO RECOGNIZE THAT THE AC I

f i.'y}I '

CEPTANCE CRITERIA 0F THE SURVEILLANCE PROCEDURE HAD NOT BEEN MET.

THE P

\\

ERSONNEL INVOLVED WILL BE COUNSEttED 10 f=. ORE CAREFULLY REVIEW $URVEILLAN O

CE RESULT 5 VS. ACCEPTANCE CRITERIA.

O v} N I THREE MILE !$tAND-2 05000320 021779 CPER ATING DIESEL GENERATOR DF-X-it WITH UNIT IN MODE 1 ON 02-f 7-79 AND 0 "h(~

EMERG GENERATOR SYS + CONTROLS 7 9-011/ 03 L -0 031679 2-21-79 D.C. DUTPUT POWER CO*'MENCED FLUCTUATING UNTIL REVERSE POWER C AUS O

ENGINrs. INTERNAL COMSUSTION 025415 30-DAY ED TRIP.

DF-X-1B WAS RESTARTED IMMEDIATELY FOLLOWING EDTH DCCURRENCES A 4

f SUSCUMPONENT NOT APPLICASLE ND SUCCESSFULLY LOADED TO 3MW FOR ONE HOUR CONFIRMING CPERASILITY AND NE

' OTHER GATING THE NEED FOR PERFORMING T.S. 3.B.1.1 ACTION A.

BOTH OFF5ffE CIRC f$'<

NDT APPLICABLE UITS AND REDUNDANT D.G. WERE OPERABLE AND EVENT DID NOT AFFECT PUBLIC HE

)4 '

O rAIRsAN(S M0e5E ALTH AND SAFETY.

THOROUGH VISUAL INSPECTIONS FAILED TO REVEAL A DEFINITE CAUSE. WIRING C y

ONNECTIONS TO GOVERNOR ACTUATOR WERE TIGHTENED AND SOLFAGE READINGS TAKE N TO IN5URE OPERABILITY OF GOV E R N"J R. ACTUATOR DIL CHANGED AS AN ADDITIO j

N AL CORRECTIVE MEA $URE. WIRING CONNECTIONS PROBABLE CAUSE WILL BE PERIO

,sU DICALLY INSPECTED.

f' 3

O O

i n

O' 1

.

ML19308C954

Contents

Text

Y. PROCEDURE

Y. PROCEDURE

S. PROCEDURE

E. PROCEDURE

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ML19308C954

Text

Y. PROCEDURE

Y. PROCEDURE

S. PROCEDURE

E. PROCEDURE

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