05000321/LER-1982-055

LER 82-055/03L-0:on 820606,panel Blowdown Valve for 1E11-C002C Found Open Making 1E11-N020C & 1E11-N016C Fail to See True RHR Pump C Pressure,Thereby Degrading ADS Actuation Logic.Caused by Personnel Error

ML20054N088
Person / Time
Site:	Hatch
Issue date:	06/29/1982
From:	Nix R GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML20054N085	List: 05000321/LER-1982-055, Forwards LER 82-055/03L-0
References
LER-82-055-03L-01, LER-82-55-3L-1, NUDOCS 8207150336
Download: ML20054N088 (2)

LER-2082-055,

Event date:
Report date:
3212082055R00 - NRC Website

text

NRC FORM 366 U. S. NUCLE AR REGULATORY COMMISSION (7 7 7). m LICENSEE EVENT REPORT CONTROL BLOCK: l I

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) j o l i j l G l A j E l I l H j 1 lgl 0 l 0 l 0 l 0 l 0 l 0 l 0 l 0 l 0 l 0 l 025l@l 4 l 1 l 1 l 1 l 1 l@l5 7 C lA T $8lg 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 26 LICENSE TYPE J0 CON'T loI1I 1 8

"$ns l60L l@l610] 5 l 0DOCKET l 0 lNUVBER 0l3l2l1 68 l@l69 0 l EVENT 6 l 0DATEl 6 l 8 l742 l@l 0175 6l 21 REPORT DATE 91 8l80 2l@

EVENT DESCRIPTION AND PROB ABl.E CONSEQUENCES Oto l o l 21 I While the plar.t was in cold shutdown and while investigating the cause  ;

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of failure of 1E11cC002C to pass "RHR Pump Operability", the panel i o a ; blowdown valve for 1E11-C002C was found open when it should have been i jo g3; ;

closed, making 1E11-N020C and 1E11-N016C fail to see true RHR Pump C g l 016 l l pressure, thereby degrading ADS actuation logic. Tech Specs 3.2-4 and  ;

o , l 3.2-5 require these instruments to be operable. Plant operation or the  ;

goig, ; public's health and safety were not affected by this non-repetitive event.  ;

DE CODE SUBC E COMPONENT CODE SUBC DE SU DE lol91 l Sl Fl @ [A_j @ W @ l Zl Zl Zl Zl Zl Zl @ l Zl @ [],j @ 18 19 20 7 8 9 10 11 12 13 SEQUEN TI AL OCCUR RE NCE REPORT REVISION EVENT YEAR REPORT NO. CODE TYPE NO.

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44 47 36 3/ 40 42 43 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h gi;o; j The cause of this event has been attributed to personnel error. An l l, i, ; ;

investigation failed to identify the personnel responsible for having I

,,,,,; left the valve open. Personnel who normally operate this valve were, l

,, , ., j l however, reinstructed as to the importance of properly following valve l i, i,j ;

lineup procedures. l 80 7 8 9 STA S  % PO/VER OTHER STATUS Di OV HY DISCOVERY DESCRIPTION i s l G l@ l 0l 0l 0l@l NA l LC_J@l Maintenance Investiaation l A TIVITY CONTENT Rf LE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELE ASE li 16 l [Z j @ l Zl@l NA l l NA i 7 89_ 10 11 44 45 80 PERSONNEL F APOSURES NUVRER TYFE DESCRIPTION l l i l i j l 0 l 0 l 0 l@l Z l@l NA l PE RSO~N A'imuks NU R DESCnPnON@

7 i a H 9 l010l0l@l 11 12 NA 80 l

TYPE ESC PT ON NA l 7

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• issuEn oE PDR ADOCK 05000321 I l-l l I I I l l I l I l *:

7 2 o a 9 W8Ls 10 eDR NA l 68 69 80 5 NAME OF PREPARER R. T. Nix, Supt. of Maintenance pnoNe: 912-367-7781 2, L_

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LER No.: 50-321/1982-055 <

! Facility: Edwin I. Hatch

. Licensee: Georgia Power Company Docket No.: 50-321 i

Narrative Report i for LER 50-321/1982-055 On June 6, 1982, while the plant was in cold. shutdown and while' investigating the cause of the failure of 1E11-C002C to pass RHR Pump Operability, the panel blowdown valve for Pump Discharge Pressure Gauge 1E11-R003C was found i

open when it should have been closed, making LPCI-Pump Discharge Pressure '

Interlock Pressure. Switches IE11-N016C and 1E11-N020C unable to see the true RHR Pump C discharge pressure. This condition thereby degraded the-ADS actuation logic. Although ADS actuation. logic is not required in cold shutdown, there existed a period of time from when the valve was found open j and when RHR Pump C operability was last performed on March 1, 1982, during t power operation, that ADS actuation logic could have been degraded. Tech-nical Specifications Tables 3.2-4 and 3.2-5 require these instruments to be j operable. Plant operation or the public's health and safety were not-affected-

} by this non-repetitive event.

The cause of this event has been attributed to personnel error. An in.vesti-gation failed to identify the personnel responsible for having left the-valve open. Personnel who normally operate this valve were, however, rein-structed as to the importance of properly following valve line-up procedures.

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