05000244/LER-1982-028-03, /03L-0:on 821219,while Performing Nitrogen Makeup to Accumulator & Charging RCS Overpressurization Sys Nitrogen,Containment Isolation Valve AOV-846 Opened & Closed Sluggishly.Caused by Matl in Plug.Seat Replaced

/03L-0:on 821219,while Performing Nitrogen Makeup to Accumulator & Charging RCS Overpressurization Sys Nitrogen,Containment Isolation Valve AOV-846 Opened & Closed Sluggishly.Caused by Matl in Plug.Seat Replaced

ML20023D105
Person / Time
Site:	Ginna
Issue date:	05/06/1983
From:	Schuler T ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20023D104	List: 05000244/LER-1982-028, Forwards LER 82-028/03L-0 05000244/LER-1982-028-03, /03L-0:on 821219,while Performing Nitrogen Makeup to Accumulator & Charging RCS Overpressurization Sys Nitrogen,Containment Isolation Valve AOV-846 Opened & Closed Sluggishly.Caused by Matl in Plug.Seat Replaced
References
CAR-1440, LER-82-028-03L, LER-82-28-3L, NUDOCS 8305190238
Download: ML20023D105 (2)

LER-1982-028, /03L-0:on 821219,while Performing Nitrogen Makeup to Accumulator & Charging RCS Overpressurization Sys Nitrogen,Containment Isolation Valve AOV-846 Opened & Closed Sluggishly.Caused by Matl in Plug.Seat Replaced

Event date:
Report date:
2441982028R03 - NRC Website

text

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LICENSEE EVENT REPORT CAR 1440 CONTROL BLOCK: l l

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l l lh (PLEASE P91NT OR TYPE ALL REQUIRED INFORMATI!N) 1 6

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8 9 UCENSEE CODE 14 uCENSE NoMSER 25 26 UCENSE TYPE JO 57 CAT 58 CON'T 011l [y'0"7 l L l@l0 l 5 l0 l0 l 0l 2l 4 l 4 @l 1 l 211 l91R 12 @l0 l5 10 l6la b l@

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60 61 COCK ET NUMS ER 68 69 EVENT QATE 74 75 REPCRT DATE 80 EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h o t a l l While performing S-16.2, Nitrogen Makeup to the Accumulator, and S-29.2, Charging the a

p lRCS Overpressurization System With Nitrogen, on 12-19-82 it was observed that A0V-846, l

,ol4l l Containment Isolation Valve for nitrogen supply to the accumulators, was opening and

! O l s i l closing sluggishly. The total valve stroke was limited. The valve was declared l

Lo,_L8 I l in perable and manual valves V-8629 and V-944A were held closed to meet T.S.

LCO l

8 ITTTl 13.6.3.1.

This item is reportable by T.S. 6.9.2.b(2) l iatalI f

7 8 9 dJ SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE SUSC00E COMPCNENT CODE SueC00E SUSCoot g

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• CODE] g g g lV lA lL lV lE lX lQ lH lg g g 7

8 9

to 11 12 13 18 19 23 SEQUENTIAL OCCURRENCE PEeORT REVISION LE R/RO EVENT YEAR REPORT NO.

CCCE TYPE NO.

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l0 l2 l8 l g

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40 4

42 43 44 47 C'.9 OESCRIPTION AND CORRECTIVE ACTIONS h

i g a l The valve was disassembled and the cause was found to be galling of the stem plu'g~~

l g ~ l-in-the-cage -assembly..--This-was-.probablyJue.. to foreign material from previous ip.ing l modifications accumulating in the tight clearance between the stem plug and cage l

m l assembly. The stem plug and cage were removed from the valve and redressed by l

l polishing out the galled surfaces. As a matter of preventive maint.enance, the valve l

i ~

7 8 9 30 STA

% POWER OTHER STATUS t

R CISCoVERY DESCRIPTION I1151. yg l 0 l. 5 l 5 l@l2.NA.

l g g l Operations. Observation l

ag ig

~7 12' 11 44 4s es so AMOUNTOF ACTIVITY @ l

- LOCATIOftOF RELEASE r.ELEASED OF RELEASE jW W h l,,,,Zj g l NA l

NA l

7 a 9 10 is 44 as ao PERSONNEL EXPOSURES NUM8ER TYPE y l 0 l 0 l 0 lhy@l DESCRIPTION l

NA PERSONNEL INJURIES DESCRimON@

NUMeER l i j a l l 0l 0] 0]@l NA l

7 a9 ct 12 80 LOSS OP o ogc TO PACiuTv g il1 l 9 l Whl NA~

l 7

8 9 to 80 PusuC TY 8305190238 830506 NRC USE ONLY iSSuEn oESCsi m oN PDR ADOCK 05000244 J2lol W hl NA S

PDR I

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3 9 to 68 69 80 * ;

T.R. Schuler

,315-524-4446 x 214

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.e CAUSE DESCRIPTION AND CORRECTIVE ACTIONS seat was replaced. The valve internal surfaces were thoroughly cleaned and the valve reassembled. The valve retested satisfactorily for timing, proper stroking, and seat leakage.

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