ML20040G588

LER 82-003/03L-0:on 820115,during Steam Line Area Temp Switch Calibr Surveillance During Refueling Outage,Switch 3-261-16C Exceeded Tech Specs Limit of Less than or Equal to 200 F.Caused by Defective Temp Sensing Bulb.Switch Replaced

ML20040G588
Person / Time
Site:	Dresden
Issue date:	02/03/1982
From:	Maxwell D COMMONWEALTH EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20040G577	List: ML20040G576 ML20040G588
References
LER-82-003-03L-05, LER-82-3-3L-5, NUDOCS 8202160276
Download: ML20040G588 (2)

Text

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7 8 60 81 coCXETNuugER 68 69 74 75 do EV ENT oATE REPORT o ATE EVENT DESCRIPTION AND PRO 8ASLE CONSEQUENCES h Ioi2l l While conducting steam line area temperature switch calibration surveillance during Unit l

3 refueling outage, switch 3-261-16C exceeded the Tech. Spec. (3.2.1) limit of less than ; j

, , , or equal to 200 F. This is of minimal safety significance because the remaining switches; would have performed their intended function in the event of high temperature in the main g steam line area. Previous occurrences reported by: R0 050-237-81-007/03L-0.

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41 lY lh I N lh l E l1 l8 l5 lh 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h l3gol l Cause due to a defective temperature sensing bulb that allowed the fill material to leak I

,,,i; l out, preventing the switch from operating correctly. The switch (Electronic Control typel l F-7, model 76B) was replaced and calibrated. All steam line temperature switches will , l

,,, y continue to be tested each refueling outage. No further action deemed necessary. l 11 141 l I 7 e s so A 4PoWEM oTHERsTATuS ot o ERY ossCoVERY oEscRIPTfoN u,,j,,s ) Lgj@ lo Io lo l@l N/A l lBlhl= T. M. Surveillance l 7

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DEVIATION REPORT Commonwealth Edison gy, , , ,

A U IT Y R .

P ART I l Tt TLE OF DEVI ATION OCCURRE Main Steam Line Area Temperature Switch 3-261-16C Out of Calibration 0,77 r , ,, ,

SYSTEM AFFEt TU 250 PLANT STATUS AT TIME OF EVENT (ESTING Mair)3 team' MOOE . Refuel , pwa<unT3 0 , LOAD (MAE)

. y 5 OtSCRIP'#0Pt F EVENT While Conducting refuel outage Surveillance DIS 250-9, it was found

's g that switch TS-261-16C did not, trip when tested at or above the Tech. Spec. limit of less than or equal to 200lF . t s

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(O CFR50.72 NRC RED PHONE O P4L T IF ICATl0N MADE YES NO EQUIPMENT F AILURE 18154 '

OYES NO WORK REQUES T NO. RESPONSI BLE SUPERVISOR Donald C. Reiers.en 0, y ,. 1-15-82 PART 2 l OPERATING ENGINEER'S COMMENTS i' All other switches were tested and fqund'to operate satisfactorily. The defective switch will be repaire<' arfor to Pa. restart from

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e O EVENT Or Puetic INTEREST 24-HOUR NRC NOTiriCATiON REO.D TECH. SPEC. VIOLATION TELEPH Tom Ton 9ue (courtesv) 1-18-82 0940 O NON aEPORTABLE OCCoRRE~CE T m m ,y n7A 14 C AY REPO R TA BLE/ T. S . REGIGN Ill DATE TIME 30 DAY REPORTABLE /T.S

. . .a CECO CORPORATE NOTIFICATION MADE j ] ANNUAL /SPECL REPORT RE0'O fF ABOVE NOTIFICATION IS PER 10CFR21 l

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