ML18037A207

LER 79-023/03L-0:on 791004,cooling Water Pump of Diesel Generator 103 Tripped.Caused by Burned Contacts in Breaker. Breaker Repaired & Pump Started Manually.Preventative Maint Procedure Will Be Revised

ML18037A207
Person / Time
Site:	Nine Mile Point
Issue date:	11/02/1979
From:	Duda E NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053B179	List: ML17053B178 ML18037A207
References
LER-79-023-03L, LER-79-23-3L, NUDOCS 7911130338
Download: ML18037A207 (4)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION

'(7.77}

LICENSEE EVENT REPORT

,4 CONTROL BLOCK:

I ,Q (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

~o 7 8 9 H Y N LICENSEE CODE H P 1QEO 14 15 O - O O O LICENSE NUMBER O O O O 25 Qo 26 a 1 I LICENSE TYPE 1

30 QE~QE57 CAT 58 CON'T

~01 ,'o'",', ~LQRO 5 0 0 0 2 2 0 QT 1 0 0 4 7 9QB 1 7 8 Go 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES QIO Durin stead state o eration i 1

~O3 bl03 Diesel Generator, the associated coolin water um tri ed due to

~04 breaker mal function. Before the breaker was manuall closed and coolin water um restarted the enerator cool in water inlet tern er-

~OS ature increased to 210OF. The diesels r

~O7 heat dama e but none was found. The cool in water um brea er wa in-

~08 s ected and the contacts wer e found to be burned and an au 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENTCODE SUBCODE SUBCODE 7 8

~EEIo Q>>

9 II E Q>> ~AQ>>

12 C K T 5 R K Q4 ~AQIE ~l 20 QIR.

13 18 19 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LERiRO REPOIIT ACTION .FUTURE EVENT YEAR

~79 21 22 EFFECT

~

23 SHUTDOWN

~02 24 REPORT NO.

3 26

~m 27 ATTACHMENT

~03 28 CODE 29 NPRDQ TYPE

~L 30

'RIME COMP.

~

31 NO.

~0 32 COMPONENT TAKEN ACTION

[B JQIR 33

~GQIE 34 ON PLANT

~ZQEE 35 METHOD LJQI 36 37 0

HOURS +22 0 0 0 40 SUBMITTED

~NIQEE 41 FORM SUB,

~NQ74 42 SUPPLIER

~AQEE 43 44 MANUFACTURER 5 0 5 0 47 QEE CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 0 Diesel Generator 103 coolin water um tri was caused b breaker mal-function. The contacts in the breaker were found to be burned and a

.auxiliary contact was found stuck in the o en osition. The breaker was repaired and the pump was manually started to test o erabilit . The 4 cooling water pump breaker preventative maintenance rocedure will be 7 8 9 80 FACILITY STATUS '4 POWER OTHERSTATUS ~

~3P,'ISCOVERY METHOD OF DISCOVERY DESCRIPTION Q32 E ~E 5Q so ~009 Io 9 5 5Q os NA ~B BQ ET Operability Test 7 8 9 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE

~zg) Z Q34 AMOUNT OF ACTIVITY W

Q NA LOCATION OF RELEASE Q 7 8 9 10 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DLSCRIPTION Q39 8

~00 0 ~ZQEE NA 7 9 11 12 13 80 PERSONNEL INJURIES s ~00 0 Qoo NA 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY 9

Q43 'F 91118 0 7 8 9 10 80 L~JQ<<NA ~

PUBLICITY DESCRIPTION NRC USE ONLY ISSUED ER s

7 8 9 IO GB 69 BO o 0

NAME OF PREPARFR E. Duda PHONE: 0

t

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7.77)

CONTINUED PAGE 2 LER 79-23 ~ LICENSEE EVENT REPQRT CONTROL BLOCK: Q) (PI.EASE PRINT OR TYPE ALL REQUIRED INFORMATION)

I 6

~0>

7 8 9 N Y N LICENSEE CODE H P l 14 Q2 15 LICENSE NUMBER 25 03 26 LICENSE TYPE 30 OR~57 CAT 58 OR CON'T 8 60 61 DOCKET NUMBER 68 Q 69 EVENT DATE 74 Qs.

75 REPORT DATE 80 Q

EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10

~02 tact was found stuck in the o en osition. The breaker was re aired

~03 and the pump was restarted manually to check its operation. The Diesel 0 4 Generator Operability Test was subsequently performed and successfull

~OS completed. This event had minimal safety implications due to the re-

~06 dundancy of the system.

~07

~os 7 8 80 SYSTEih'I CAUSE CAUSE CohIP. VALVE

~Q~Q CODE CODE SUBCODE COMPONENT CODE SUBCOOE SUBCOOE

~OB 7 8 9 10 Gi 11 GE ~Q>>

12 13 18 Q 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q17 LEAIAO REPORT ACTION . FUTURE EVENT YEAR

~79 21 22 EFFECT

~

23 SHUTDOWN

~02 24 RFPORT NO.

3 26 27 28 CODE ATTACHMENT 29 NPRD.4 TYPE 30 31 PRIME COMP.

LJ COMPONENT TAKEN ACTION ON PI.ANT METHOD HOURS ~22 SUBMITTED FORM SUB. SUPPI.IER MANUFACTURER

~GREIGE ~025 ~Q LID>> LJO2. 02.

44 47 OE.

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS 27 0 revi sed to incorporate a separate operabi 1 i ty test of the cool i ng water pump prior to performing the entire diesel generator operability test.

3 7

7

[115]

7 4

8 8

8 9 FACILITY STATUS 9

ACTIVITY

~

Q25 ~10

'4POWER CONTENT RELEASEO OF RELEASE 9

Q33 10 Q34 11 12 Q25 13 OTHER STATUS Q30 AMOUNT OF ACTIVITYQ36 44 44 METHOD OF DISCOVERY

~Q3I 45 45 46 DISCOVERY DESCRIPTION LOCATION OF RELEASE Q 32 80 80 80

~QuS PERSONNEL EXPOSURES zz NUMBER TYPE DESCRIPTION Q30

~Q 7 8 9 11 12 13 80 PERSONNEL INJURIES CKl 80 LOSS OF OA DAMAGE TO FACILITY TYPE DESCRIPTION Q43 9 Q42 7 8 9 10 80 0

ISSUED

~Qnn PUBLICITY DESCRIPTION ~ NRC USE ONLY ER 5

7 8 9 10 68 69 80 0

NAME OF PREPARER PHONE:

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