05000334/LER-1982-031-03, /03L-0:on 820826,main Feed Regulating Valve FCV-FW-498 for C Steam Generator Found Leaking Excessively When Shut.Caused by Improper Seating of Seat Assembly Into Valve Body.Maint Procedure Revised

/03L-0:on 820826,main Feed Regulating Valve FCV-FW-498 for C Steam Generator Found Leaking Excessively When Shut.Caused by Improper Seating of Seat Assembly Into Valve Body.Maint Procedure Revised

ML20027B752
Person / Time
Site:	Beaver Valley
Issue date:	09/17/1982
From:	Lacey W DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20027B751	List: 05000334/LER-1982-031, Forwards LER 82-031/03L-0 05000334/LER-1982-031-03, /03L-0:on 820826,main Feed Regulating Valve FCV-FW-498 for C Steam Generator Found Leaking Excessively When Shut.Caused by Improper Seating of Seat Assembly Into Valve Body.Maint Procedure Revised
References
LER-82-031-03L, LER-82-31-3L, NUDOCS 8209300063
Download: ML20027B752 (2)

LER-1982-031, /03L-0:on 820826,main Feed Regulating Valve FCV-FW-498 for C Steam Generator Found Leaking Excessively When Shut.Caused by Improper Seating of Seat Assembly Into Valve Body.Maint Procedure Revised

Event date:
Report date:
3341982031R03 - NRC Website

text

U.S. NUCLEAR REGULATORY COMMISSION NRC PORM.3Eg g7. m LICENSEE EVENT REPORT CONTROL BLOCX: l l

l l

l l

h (Pt. EASE PRINTCQ TYPE ALLREiUIRE NPORMATl!N) lo l t l l P l A l B l V l S l 1 l@180 l0 l-l0 l0 l0 l0 l0 l-l0 l0

@l4 l1 l1 l1 l1 l@l l

l@

7 8 9 UCENSEE COOE 14 UCENSE NUMSER 21i 28 WCENSE TvPE Jo

$7 CAT SS CON'T loliI 1% l L l@l 0 l 510 l 0 l0 l 31314 l@l 0 l 8 l 2161812]@l 0l 9l 1l 7 l 8 l 2 l@

7 8

80 61 OOCKET NuadSER 68 SS EVENT QATE 74 78 REPORT DATE 80 EVENT DESCRIPTION AND PROSA8LE CONSEQUENCES h l o 121 i During a plant startup FCV-W-498 (main feed regulatine valve for C I

ITTTlI steam generator) was identified as having excessive leakane. when shut.

I lo141l A load reduction was inade and FCV-W498 was inninead _ vin Mov-1:U-l uc.

I IO Is! I Piant operation continued via the bypass valve FCV-N-499.

There were no 1

1016 l l nafety imn11cnefons duri n a ehi n incidane dua en eha nnavnh 414 ev nf tha l

l0l7l l header isolation MOV-N-156C, which would have provided containment I

ITTTII isolation if reautred.

7 8 9 CODE COO 9

COMPONENT CODE Sue E

sue foTil l C I a l@ W@ [J;,j@ l v I A I T. I vi vI vlO LF_l@.

G@

7 8

9 to 11 12 13 18 19 SSOUENTIAL OCCURRENCE REPORT REVISION LER/RO EVENT YEAR REPORT NO.

COOE TvPE NO.

O,RE, l8121 l-l lOlMll [d

lolal l--I 21 22 23 24 28 27 25 25 31 EN CTI O P T

M MOURS ITT PORM S.

SU MA AC RER lE[gl34Gl@

Q@

IZ l@

l010l0l0j l Y l@

W@

[,ji,,j@

lCl6l3ISI@

23 38 30 37 40 43 43 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIOP.S 27 1 101 l Investication into Fev-1% AqR internals revenind rhne ebn a nn e no e:nmb l y 1

It i1l l (Cneo) hnd not bonn senrod ( th re nde d) enmninen1v inen eh n knar o f th e j

gI valve.

Future maintenance will require both torque limitn and feeler i

Iil3l l gnge measurements to insure proper seatinn of the <' ace assembly.

l I

11 14 II ao 7

a 9 SA

% POWER OTHER STATUS 1 OV R DISCOVERY DESCRIPTION Ii 15_I (,J.j@ l 0 l 210 l@l N/A l

J @l Operator Observation l

• 2nviry CONTENT AuCuNTOP ACTiviTv h l t.OCATION OP RELsASE h 4

aELEAsEO oPRELEasE N/A l

N/A l

I'l6l W @ d @l 7

s 9 io is a

as so PERSONNEL EXPOSURE 5 NUMSER TvPE QESCRIPTTON I 1 l 7 l l 01 O l 0 lhl Z lhl N/A l

PERSONNEL iN;Udits NUMGER OESCRIPTION 11 lall0l0l0l@l N/A l

• 00ss OP OR OSacES PactuTv 8209300063 820916 43 PDR ADOCK 05000334 rvPE 0:sCRimON S

PDR l

li 191 l Z l@l N.

30 7

d 9 to 155UEO@DE CRIPTION lNl l

N/A l

ll!!!IIlIlllI5 I2lol 68 69 80 3 7

8 3

!O

. S. Lacey PHONE:

NAME OF PREPARER i

.o Attachment to LER 82-031/03L Beaver Valley Power Station Duquesne Light Company Docket No. 50-334 No further information is available or needed to satisfy the reporting requirement.

l