ML18037A245

LER 80-008/03L-0:on 800315,during Steady State Operation, Alarm in Control Room Signaled Loss of Flow to Stack Gas Sampling Sys.Caused by Stack Sample Flow Inlet Valve Failing Closed,Due to Arcing Relay Contacts

ML18037A245
Person / Time
Site:	Nine Mile Point
Issue date:	03/20/1980
From:	Falise M NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053B516	List: ML17053B515 ML18037A245
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8003310313
Download: ML18037A245 (2)

Text

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~01 7 8 9 LICENSEE CODE 14 Q 15 LICENSE NUMBER 25 Q 3 26 LICENSE TYPE 30 Q~Q 57 CAT 58 CON'T

~O 7 <<8 soURcE LAO 0 60 61 5 0 0 0 DOCKET NUMBER 2 2 0 68 7

69 0 3 1 5 EVENT DATE 8 0 74 QB 75 0 3 2 REPORT DATE 0 8 0 80 QB EVENT OESCRIPTION AND PROBABLE CONSEQUENCES Q10 Durin stead state o eration, an alarm in the control room si nailed

~o 3 loss of flow to the stack gas sampling system. Investigation revealed

~o 4 that the stack sample flow inlet valve had failed closed. Environmental

~o 5 Technical Specification 2.4.4 requires a grab sample be taken every 24

~D B hours with the s stem out of service. Since the s stem was onl down

~o 7 f'r four hours the effects on the environment were minimal.

~OB 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

[oO~] ~NC Qll E Q73 ~A Q73 8 L 0 W E 8 Qll ~Z QIR ~Z QIR 7 8 9 10 12 'l3 18 19 20 SEQUENTIAL OCCURRENCE REPORT RFVISION Ql7 LER PRO REPORT ACTION FUTURE EVENT YEAR

~80 21 22 EFFECT

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23 SHUTDOWN

~00 24 REPORT No.

8 26

~m 27

~03 28 ATTACHMENT CODE 29 NPRD<

~L TYPE 30 PRIME CohIP.

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32-COMPONENT TAKEN ACTION

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-- ~LQ25 MANUFACTURER A- -5 5 7 CB 36 40 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 o Investigation of the problem revealed that the relay contacts for the power operated valve were arcing. Technicians adjusted the contacts to restore the system to service. No future action is required.

3 4

8 9

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7 FACILITY METHOD OF STATUS <<IPOWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION Q32

~S 7 8 9 E QIR ~OS 10 12 iVA 44

~AQ31 45 ALARM IN CONTROL ROOM 13 80 ACTIVITY CONTFNT B

RELEASED OF RELEASE

~Z Q33 ~ZQ34 NA AhIOUNT OF ACTIVITY Q NA LOCATION OF RELEASE Q "7 8 9 10 44 45 80 PERSONNEL. EXPOSURES NUMBER TYPE DESCRIPTION Q39

~00 0 Qjl ~ZQ33 NA 7 8 9 11 12 13 80 PERSONNEL INJURIES NUMBER DESCRIPTIONQ41 I ~00 0 QIO NA 7 8 9 11 12 80 LOSS OF OR DAMAGE To FACILITY TYPE DESCRIPTION Q43 Z Q42 NA 7 8 9 10 80 PUBLICITY NRC USE ONLY ISSUED DESCRIPTION QS Djg 7 8 uZQ44 9 10 VA 68 69 80 o o

I NAME QF PREPARER ichael J. Falise PHONE: xt. 1208 0 IA 0

800s 030

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