05000249/LER-1980-006-03, /03L-0:on 800215,during Local Leak Rate Test Performed on a Feedwater Inboard Check Valve 3-220-58A Measured Leakage Exceeded Tech Specs.Caused by Worn Seat/ Disc Assembly Pins

/03L-0:on 800215,during Local Leak Rate Test Performed on a Feedwater Inboard Check Valve 3-220-58A Measured Leakage Exceeded Tech Specs.Caused by Worn Seat/ Disc Assembly Pins

ML19305B358
Person / Time
Site:	Dresden
Issue date:	03/13/1980
From:	Ciesla T COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17192A580	List: 05000249/LER-1980-006, Forwards LER 80-006/03L-0 05000249/LER-1980-006-03, /03L-0:on 800215,during Local Leak Rate Test Performed on a Feedwater Inboard Check Valve 3-220-58A Measured Leakage Exceeded Tech Specs.Caused by Worn Seat/ Disc Assembly Pins
References
LER-80-006-03L-02, LER-80-6-3L-2, NUDOCS 8003190576
Download: ML19305B358 (2)

LER-1980-006, /03L-0:on 800215,during Local Leak Rate Test Performed on a Feedwater Inboard Check Valve 3-220-58A Measured Leakage Exceeded Tech Specs.Caused by Worn Seat/ Disc Assembly Pins

Event date:
Report date:
2491980006R03 - NRC Website

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- o 121 l During Unit 3 refueling outage, a LLRT was performed on "A" feedwater inboard check l

valve 3-220-58A.

The measured leakage was 1,104.51 SCFH, which exceeded the limit l

c,3, l g,,, ; for a single isolation valve (29.38 SCFH, Tech. Spec. 4.7.A).

This was of mini =al l

g,3,, safety significance since leakage measured through the outboard feedwater check valve l Was belOV IGCh. Spec. limits and the feedwater line is Capable of being isolated by l

016 l l o,,; ; a motor operated valve upstream of the check valves.

Similar event:

50-239/78-03.

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33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS s t o l l Excessive leakage through feedwater check valve 3-220-58A was dte to worn seat /dise I

1il l arsembly pins, which prevent proper alimment of the dise to the seat.

The seat / disc I 1

,,2i l assembly was replaced and the valve retested.

Leakage was reduced to 0.520 SCFH.

I i ; 31 l well below Tech. Spec. limits. ' The replacement assembly pins and bushings are made l

,,,,l from a hardened alloy.

No further corrective action deemed necessary.

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DEVIATION REPORT

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gy, gg, Commonwealth Edison STA UNIT YEAR N O.

D 3 9 PART1lTlTLE OF DEVIATION OCCU RRED 2/15 80 Fesd Water Check Valve Excessive Leakage 1p,1]

0 ;g SYSTEM AFFECTED

PLANT CONDITIONS

TESilNG 3200 g

Feedwater-Refuel 0

0 MODE

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, te,o gywg3 YEs NC DESCRIPitON OF & VENT During LLRT of feedwater inboard check valve 220-58A, the measured leakage was 1,104.511 SCFH, exceading the Tech Spec. limit of 29.38 SCFH for a single penetration of isolation valve.

DESCRIPTION OF CAUSE Unkriown OTHER APPLICABLE INFCRMATION Leakage was stooped bv feedwater outboard ch'eck valve 220-62A.

EQUIPMENT C YE5 DR NO.

'WR NO.

J hn Dunbar 2/24/80 FAILURE I

INO N/A 05027

1. ESP _ONSIBLE SUPERVISOR DATE PART 2 l OPERATING ENGINEERS COMMENTS To*al l a n 'n c a *krouch the "A" feedwater did not exceed the limit for throuch leakace civen in 4.7.A.2.e.

However,the limit for single valve leakage was exceeded.

SAFETY-TYPE OF CEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLI C INTEREST VI OL ATI ON OCCURRENCE REPGRTING WR ISSUED 10CFR21 14 DAY YES YES NOTI FI C ICN NO NO L

30 DAY REPORTABLE CCCURRENCE ACTION ~ ITEM NO.

PROMPT ON-SITE NOTIFICATION NUMBER R. M. Ragan 2/25/80 1400

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rdi-80-6/03L-0 N/A TITLE DATE TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION TPH F. Palmer 2/26/80 8:45 REGION Iil DATE TIME TITLE DATE TIME TGM J. Gilliom 2/26/80 8:45

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REGION iiI & COL CATE TIME TITLE DATE TIME RESPONSI BLE COMP ANY OFFI CER INFORMED OF 10 C F R 21 TITLE DATE i f M r.

CON 0iT!ONs aNO TwEv o oEPORT TO NPC REVIEW AND COMPLETED /1 M. Wright 2/26/80

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OP E R AT I N G ENG (N Edn DATE CEP BY STATION REVIEW DATE RESOLUTION APPROVEC AND

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