ML18024A927

LER 79-014/03L-1 on 790526:while in Cold Shutdown for Refueling,Local Leak Rate Testing Revealed That Total Leak Rate Exceeded Allowable 60%.Caused by Deterioration of Valve Seats on Main Steam Sys.Valves Repaired

ML18024A927
Person / Time
Site:	Browns Ferry
Issue date:	07/30/1979
From:	TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18024A926	List: ML18024A925 ML18024A927
References
LER-79-014-03L, LER-79-14-3L, NUDOCS 7908020502
Download: ML18024A927 (2)

Text

~ , UPDATE REPORT PREVILA REPORT DATE 6/26/79 U. S. LEAR REGULATORY COMMISSION I7 77)

LlCENSEE EVENT REPORT CONTROL BLOCK: IPLEASE PRINT OR TYPE ALL REQUIRED INFORIVIATIONI~

I 6

~01 7 8 9 A L B LICENSEE CODE R F 2 14 Q2 15 0 0 0 0 0 LICENSE NUMBER 0

25 QsA 26

> X LICENSE TYPE X X 30 Q4~00 57 CAT 58 CON'T

~OI " " 0 0 0 2 6 0 Q70 5 2 6 7 9 0 7 3 0 7 9

~LQB 0 5 68 09 EVENT DATE IQB 74 75 REPORT DATE 80 QB 7 8 60 61 DOCKET NUMBER EVENT DESCRIPTION AND PROBABLE CONSEQUENCES QIO

~o 2 While in cold shutdown for refuelin local leak rate testing was performed in accor-dance to technical specification 4 '.A.2.g. The total leak rate of 5026.5225 SCFH

~o 4 exceeded the allowable 60 ercent of LA per 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of 707.1 SCFH. There were no significant resulting events nor any danger to health or safety of the public. A

~0 B previous similiar occurrence was reported on BFR0-50-259-793.

~OB 80

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7 8 9 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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~SA 9 10 Q>1 11 E Qlz ~BQn 12 13 V A 0 V E X 18 Q>4 ~XO>

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SEQUENTIAL OCCURRENCE REPORT REVISION LERIRO ACTION FUTURE EVENT YEAR 21 22 EFF ECT

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23 SHUTDOWN 24 REPORT NO.

26 U~

27 LUB 28 ATTACHMENT CODE 29 NPRD 4 TYPE

<B 30 PRIME COMP, LJ 31 NO.

L~J COMPONENT TAKEN ACTION ON PLANT hIETHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~BQIB ~ZQIB 33 34

~ZQ20 35 LJQ21 36 37 0 0 0 0 40 Y

41 Q23 ~~Q24 42 Ll 43 Q2S Z 44 9 9 9 47 Q20 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 The excessive total leakage was caused b deterioration of valve seats on the follow-ing systems: Hain Steam, Ventilation and Contaiiunent Dilution Feedwat Valve nameplate data is being furnished on a su lement to this re ort. The valves were repaired and retested to demonstrate compliance.

4 7 8 9 80 FACILITY STATUS .4 POWER OTHER STATUS Q METHOD OF DISCOVERY OISCOVEI'IY DESCRIPTION Q32

~ Q2. ~oo 0Q2, NA 44

~B QqI Surveillance Testing 7 8 9 10 12 I '1 45 46 80 ACTIVITY CONTENT RELEASEO OF RELEASE AMOUNT OF ACTIVITYQs LOCATION OF RELEASE Q EKI &Q 7 8 9 10 Q34 NA 44 45 80 PERSONNEL EXPOSURES NUI'NBER TYPE DESCRIPTION Q30

~00 0 Qqz E Q NA 7 8 9 11 12 13 80 PERSONNEL INJURIES 7 8 9 11 12 80 LOSS OF OR DAAIAGE To FACILITY TYPE DESCRIPTION Q43 0 ~ZQ42 NA 8 9 10 80 PUBLICITY NRC USE ONLY 7 8 9 10 68 69 80 0

NAME OF PREPARER PHONE:

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