05000249/LER-1981-015-03, /03L-0:on 810618,switch Actuated at 32.8 Inches During Calibr of Isolation Condenser Steam/Condensate Line High Flow.Caused by Instrument Drift.Switch Reset

/03L-0:on 810618,switch Actuated at 32.8 Inches During Calibr of Isolation Condenser Steam/Condensate Line High Flow.Caused by Instrument Drift.Switch Reset

ML20009D581
Person / Time
Site:	Dresden
Issue date:	07/13/1981
From:	Mancini B COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20009D579	List: 05000249/LER-1981-015, Forwards LER 81-015/03L-0 05000249/LER-1981-015-03, /03L-0:on 810618,switch Actuated at 32.8 Inches During Calibr of Isolation Condenser Steam/Condensate Line High Flow.Caused by Instrument Drift.Switch Reset
References
LER-81-015-03L-01, LER-81-15-3L-1, NUDOCS 8107240191
Download: ML20009D581 (2)

LER-1981-015, /03L-0:on 810618,switch Actuated at 32.8 Inches During Calibr of Isolation Condenser Steam/Condensate Line High Flow.Caused by Instrument Drift.Switch Reset

Event date:
Report date:
2491981015R03 - NRC Website

text

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NGC POR8( 384 U.S. NUCLEAR REGULATO?.Y COMMISSION I (7M)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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80 61 DOCKET NUM8ER 68 69 EVENT DATE 74 75 REPORT QATE SO EVENT DESCRIPTION AND PROBA8LE CONSEQUENCES h l o 12 i l While performin~g Isolation Condenser Steam / Condensate Line High Flow Calibration, found l g i switch 3-1349B actuated at 32.8 inches W.C. increasing in excess of T.S. Limit of 32 l

l inches. This constitutes operation in a degraded condition (T.S. Table 3.2.1).

Safety l g l significance was minimal, since redundant switch was available. No affect on public l

l C 16 l l health or safety. Previous occcurrence R.O. 79-22/03L-0 Docket 50-249.

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CODE TYPE N O.

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CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11 l o l,j Due to instrument drif t flow switch made up contacts above limits. Completed DIP l

ll g l010-9 and reset switch to trip at 29.] inches water column increasing and verified l

l repeatability. Switches are tested monthly using DIS 1300-2.

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DEVIATION REPORT y v='",

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Commonwealth Ed.ison STA UNIT YEAR N O.

B 3 34 dn N [Is kac[on" Condenser Condensate Lin Hi Flow Switch Trips CCCb/81 1400 Creater Than.32 Inches..W.C4 g,;g 7,yg SYSTEM AFFECTED 1300

PLANT CONDITIONS

TESilNG Icelction Condenser Run 2487 804 CC MODE Pw n f MwT)

, LCAD(MWE)

YES NO CESCRIPTION OF EVENT DI" 1300-2 on Unit 3 found dpis 3-1349B to trip at 32.8 inches W.C. increasing on first check.

(S cond and third checks showed 33 inches W.C. increasing)

DESCRIPTION OF CAUSE Nona found

~6THER APPLICABLE INFORMATION Completed DIP 010-9 and reset switch to trip at 29.1 inches W.C.

increasing and verified rcpectabil1Py.

EQUIPMENT YE5 DR NO.

WR NC.

Alan R. Zapotocky 6/18/81 FAILU RE NO l DATE USPONSIBLE SUPEevlSO4 PART 2 l OPERATING ENGINEERS COM*AENTS Th, switch was irmediatelv ree librated and repeatability was verified.

SAFETY-TYPE OF DEVIAT'ON EVENT OF POTENTI AL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE 0]URRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTI NG WR ISSUED 10CFR21 YES X YES 14 DAY lX 30 DAY f,T '. B'.. a' "

6 REPORTABLE OCCURRENCE ACTION ITEM NO.

PROMPT ON-SITE NOTIFICATION R. M. Raean 6/19/81 11:30 Tl RE DATE TWE X30- 81-15/03h-0 TITLE CATE TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION TPH

7. A. Falmer 6/19/81 12:38 REGION lli DATE TIME TITLE DATE TIME TGM REGION lli & COL CATE TIME TITLE DATE TIME RESPONSI BLE. COMP ANY OFFI CER INFORMED OF 10CFR21

._E DATE TiML Tl CON D I TI ON S AND THEip QEPO AT TO NPC REV1EW AND COMPLETED - Michael Wrir,ht 6/19/81 OPERAT4NG ENGANEER/

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