ML18037A278

LER 80-012/03L-0:on 800419,during Surveillance Testing of Turbine Anticipatory Trip Bypass,Rx Scram Switch 02-13A Was Operating Outside Setpoint.Caused by Instrument Drift.Switch Readjusted & Will Be Tested Monthly

ML18037A278
Person / Time
Site:	Nine Mile Point
Issue date:	08/01/1980
From:	Harrison P NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053B840	List: ML17053B839 ML18037A278
References
LER-80-012-03L, LER-80-12-3L, NUDOCS 8008110344
Download: ML18037A278 (2)

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AR!VI 366 LICENSEE EVENT REPORT 1 U. S. NUCLEAR REGULATORY COMAI1ISSION CONTROL BLOCK: I I IPLEASE PRINT OR TYPE ALL REQUIRED INFORMATIONI 1 6 8

N IY N L!CENSEE COne III P 1 Q 0 0 - 0 0 0 0 0 0 OQ34 25 26 LICENSE TYPE 30 Qv~ 57 CAT 58 Qo CON'T

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soURc='LLO 60 61 0 I5 0 0 10 DOCKET NUMBER 2 2 0 68 Q7 69 0 4 1 EVENT OATE 9 8 OQBO 74 75 8 0 1 REPORT OATE 80 Q

EVENT DESCRIPTION ANO PROBABLE CONSFQUENCES QIO O During normal operation while performin surveillance

~03 testing of the turbine anticipatory trip bypass rx scram

~o switch 02-13A was found to be operating outside its setpoint

~OS of 355 psi and tolerance of ~ 5 psi as found at 362 psi.

~OB Three other switches performing the same function were found at proper setpoints and functioning as

~OB designed.

t 80 SYSTF LI44 CAUSE COL! P. VALVE CC COOs. SUBCOOE COMPONENT COOS SUBCQOE SUBCOOE

~HB Q I Li 11 x Q L7JGs I tl s T 0 0 18 8 L~JQ7 19 L2J Cs' REVISIOtv SFOUENTIAL OCCURRENCE REPORT COOE'YPE L

EVENT YEAR REPORT NO.

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"'77'.71~810 I ~011 12 24

~m ~0312!'O L I I NO.

i3" 01 26 27 28 31 ACTION FUTURE EFFECT SHUTOOIVti ATTACHMENT NPROA PRlh1E CohtP. COMPONEvNT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBNIITTEO FORM SUB. 5UPPLIER IVIANUF*CTURER

~~QIB ~~QI ~ZQ2o ~ZQ2 0 0 0 0 ~IV Q3 ~YQ24 ~tI Q25 8 Of 6 f 9 (

35 3tt 377 40 4: 42 43 44 47 CAUSE DESCRIPTION ANO CORRFCTIVE ACTIONS Q27 o This event is attributed to instrument drift. The switch was immediately adiusted within setooint limits and is re ularl tested on a monthl basis.

~i 8 9 80 FACILITY ST TI'. "'OTVEk OTHER STA TUS Q METHOO OF OISCOVERN DISCOVERY DESCRIPTION Q32

~sQFL ~os 0 Qs Surveillance Test 5  !

'.. 44 -80 ACTIVITY Cott 7 5 OF RELEAS 'ELEASEO e,

Ah1OUNTOF ACTIVITY Q LOCATION OF RELEASE Q 7 8 9 10 11 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39

~77 ~00 0 Q77 ~ZQss NA 7 8 9 11 12 13 80 PERSONNEL INJURIES NUMBER OESCRIPTIONQ

~00 0 Qs NA 7 8 9 I 'I 12 80 LOSS OF OR OAt4AGE TO FACILITY TYPE OESCRIPTION Q43 o ~ZQ42 IIA 7 8 9 II7 80 I'UBLICITY OE5CRIPTIQN Qs NRC USE ONLY

~2O ~tI 4 NA 7 8 9 10 68 69 80 g 0 O8 110 P,f.!EOFPREPARER Paul Harrison PHONE. 31 5 343 '21 1