ML18038A545

LER 81-005/04L-0:on 810202,plant Discharge Temp Vs Plant Inlet Temp Tech Spec Was Exceeded for 52-h During Circulating Water Reverse Flow Operation.Cause Not Stated. Checklist to Be Revised to Prevent Future Occurrence

ML18038A545
Person / Time
Site:	Nine Mile Point
Issue date:	03/04/1981
From:	Harrison P NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053C409	List: ML17053C408 ML18038A545
References
LER-81-005-04L, LER-81-5-4L, NUDOCS 8103120539
Download: ML18038A545 (4)

Text

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'O' EVENT OESCRIPTION ANO PROBABLF CONSEQUENCES 14 5

'15 0 0 0 LICENSEE EV ENT DOCKET NUMBER 6

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2 LICENSE NUMBER 0

68 10 Q70 69 R EPORT 2 0 EVENT DATE IPLEASE PRINT OR TYPE 2

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REQUIRED INFORMATION)

LICENSE TYPE 75 0 3

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REPORT DATE 57 CAT 58 8 1 80 P,

~63 'the plant discharge temperature vs. plant inlet temperature IhIT Technical Specification was exceeded for a 52-hour period. During, this period, the Main 'Condenser differential

'emperature was within Technical Specification requirements.

~os

~08 80 7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE COO CODE SUBCODE COMPONENT CODE SUBCDOE SUBCOOE

~HF 9 10 Qll ~A Q12 ~A 12 Q13 Z Z Z Z 2 Z 18 Q14 ~Z I9 Q15 ~Z 20 Ols, 7 8 11 13 SEQUENTIAL OCCURRENCE REPQRT REVISION Q17 LER/RO Rtlosz ACTION . FUTURE EVENT YEAR

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23 SHUTDOWN

~00 24 REPORT No.

5 26

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27

~04 28 ATTACHMENT CODE 29 NPROA TYP E

~L 30 PRIME COMP

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~0 32 COMPONENT TAKEN ACTION ON PLANT METHOD HOURS +22 SUBMITTED FORhl SUB. SUPPLIER MANUFACTURER

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33 34 35 ~ 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS 27 o For the first six and one-half hours of reverse flow o aration the inlet disohar e AT were within limits. Followin this eriod it was found that the hT had exceeded the z 50 F differential limit varying between 51-55 F for a roximatel a 52-hour eriod. '!

7 Upon Supervisory recognition, an immediate station load reduction was taken which

~74 brought this IhT within limits. For future prevention, a check of (SEE OVER)

~

7 8 9 FACILITY ~30 METHOD OF

~ STATUS Yi POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION Q32 5 ~E Q26 ~09 0 pzg N/A ~BQ37 SUPERVISORY INSPECTION 7 8 9 10 12 13 44 45 46 80 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY 3 ~ ~~ LOCATION QF RELEASE 6 ~Z Qzz ~ZQ34 N/A N/A 7 8 9 10 11 44 45 80 PERSONNEL FXPOSUAES NUMBER TYPE DESCRIPTION

~77 ~00 0 Oll ~ZQ36

'I1 13 N/A 7 8 9 12 P ERSQNN EL INJURIES NUMBER DESCRIPTION 41

~OO 0 Po N/A 7 8 9 11 12 80 LOSS OF OR DAMAGE 40 FACILITY 43 TYPE DESCRIPTION g Z Q42 N/A 7 8 9 10 BO PUBLICITY NRC USE ONLY ISSUED DESCRIPTION 8 CK ~~P<<N/A 8 9 10 .68 69 I

Bo B P. Harrison (315) =343-2110, ext . 32/1 <g

P tnis plant hT during reverse flow operation will be added to the Operations shift checklist. In addition, the requirement of this limit was re-emphasized to operations personnel.

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