ML18283B340

Licensee Event Report Concerning an Outboard Main Steam Isolation Valve, Which Closed Faster than Allowed by Technical Specifications

ML18283B340
Person / Time
Site:	Browns Ferry
Issue date:	07/18/1978
From:	Fox H Tennessee Valley Authority
To:	O'Reilly J NRC/IE
References
Download: ML18283B340 (6)

Text

P 7/zs/~8 REGULATORY INFORMATION DISTRIBUTION SYSTEM

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DISTRIBUTION FOR INCOMING MATERIAL 50-296 REC:

OREILLY J P

NRC ORG:

FOX H S TN VALI EY AUTH DOCDATE: 07/i8/78 DATE RCVD: 07f2i/78 DOCTYPE:

LETTER NOTARIZED:

NO, COPIES RECEIVED

SUBJECT:

LTR i ENCL i LICENSEE EVENT REPT 178-0i4 ON 6/26/78 CONCERNING AN OUTBOARD MSIV FCV 3/i/38 CLOSED FA TLR THAN ALLOWED BY TECH PEC

3. 7. D. i.

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PLANT NAME:BROWNS FERRY - UNIT 3 REVIEWER INITIAL:

XRS DISTRIBUTOR INITIAL:

4F<<F<<HHHHHHF4HF~4HHF DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS INCIDENT REPORTS

<DISTRIBUTION CODE A002)

FOR ACTION:

INTERNAL:

EXTERNAL:

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NRC PDR<<FW/ENCL MIPC++W/3 ENCL EMERGENCY PLAN BR~<W/ENCL EEB>>FW/ENCL PLANT SYSTEMS BR<~W/ENCL AD FOR PLANT 'YSTEMS<<FW/ENCL REACTOR SAFETY BR<+W/ENCL VQLLMER/BUNCH++W/ENCL POWER SYS BR<<FWfENCL DISTRIBUTION:

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JL'L 1 8 ]97e TENNESSEE VALLEYAUTHORITY CHATTAr(lOOGA. TEr(ir(iESSEE 37401 Mr. James P. O'Reilly~ Director U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region XX 101 Marietta Street~ Suite 3100 Atlanta, Georgia 30303 Deax Mr. O'Reilly:

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TENNESSEE VALLEYAUTHORITY EHOWNS FERRY NUCLEAR PLQ7P UNIT, 3 - DOCKET NO. 50-2)6 - FACILITY OPERATING LICENSE DPR EEPORTAKE OCCURRIM REPORT 3PRO 50-296/7814 The enclosed report provides details concerning an outboard main steam isolation valve, FCV 3-1-38~ which closed fastex'han allo>red by technical specifications duxing a pexiodic surveillance instruction while the unit sras in a shutdown condition.

This xeport is submitted in accordance with Bzewns Ferry unit 3 technical specification 6.7.2.b.(2).

Very truly yours, TENNESSEE VALLEYAUTHORITY Hi ST Fox Director of Power Production Enclosure (3) cc (Enclosure):

Director (3)

Office of Ifanagement Information and Program. ontrol U.S. Nuclear, Regulato'ry Commission Mash ton,D.C.

20555.

Director (IN)

Office of Inspection and. Enforcement U.S; Nuclear Regulatory Commission Qashington, D.C.

20555 An Equal Opportunity Employer

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,Q IPI.EASE PRINT OR TYPE ALLREQUIRED INFORMATION) 0 0

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LICENSE NUMBER 0~Q 25 26 LICENSE TYPE 30 57 CAT 58, EVENT DATE 80 09 SOURCE L~JQB 7

60 61 DOCKET NUMBER 68 69 4

75 REPORT DATE EVENT'DESCRIPTION AND PROBABLE CONSEQUENCES 010

'v7hile the unit was in a shutdown condition a

eriodic survei'llance inst:r p"rformed on the MSIV' An out ooard MSIV FCV 3-1-38 closed faster the n a llowed bv 4

T.S.3. (.D,l, The resulting LCO was observed and MSIV FCV -I-

"as closed There was no effect to the public health and. safety.

Previous event was 50-296/ Bl

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80 SYSTEM CAUSE CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCODE

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9 10 11 12 13 18 i,19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

/RO EVENT YEAR REPORT NO.

CODE TYPE NO.

'17 REI47 ~78

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QC 2'I 22 23 24 26 27 28 29 30 31 ACTION. FUTURE EFFECT SHUTDOWN ATTACHMENT NPRDR PRIME CohIP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER

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8 Q26 I)3 34 35 36 37 40 4'I 42 43 44 47 BECAUSE DESCRIPTION AND CORRECTIVE ACTIONS &27 o

Invcsti at,ion revealed an Atwood-Morrill valve's t.

Fluid was added.

and the valve was s17cessf'ul r

3-5 sec.

T.S. limit.

Further action is to check the dash t

f' week until next refuelin outa c.

At that time the Rash nt.

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FACILITY STATUS

'4 POWER OTHER STATUS QBO 1

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29 HA NAME OF PREPARER 0 LLLJO ACTIVITY CONTENT RELEASED OF RELEASE AMOUNTOF ACTIVITYQ36 Cra W Q33 LJQ34 NA 7

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10 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7

~00 0

QÃ~ZQAA NA 7

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11 12 13 PERSONNEL INJURIES 1

NUMBER DESCRIPTIONQ41 8

~00 0

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11 12 LOSS OF OR DAhIAGE TO FACILITYQ43 TYPE DESCRIPTION 9

~ZQ42 NA 8

9 10 PUBLICITY ISSUED DESCRIPTIONQ "KZ WQ44

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9 10 METHOD OF DISCOVERY LBJQ>>

45 46 45 80 80 80 80 80 PHONE:

68 69 80 NRC USE ONLY III O

V 80 0a DISCOVERY DESCRIPTION Q32 Surveillance Performance LOCATION OF REI.EASE Q NA

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