ML20084K565

AO 50-265/74-13:on 740710,level Switch LIS-2-263-72D Failed. Mechanic Lightly Tapped Switch Considering Possibility That Magnetic Trip Mechanism Misaligned.Mechanism Disassembled & re-aligned & Tested Weekly

ML20084K565
Person / Time
Site:	Quad Cities
Issue date:	07/11/1974
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084K568	List: ML20084K565 ML20084K580 ML20084K589 ML20084K594
References
AO-50-265-74-13, NJK-74-149, NUDOCS 8305190478
Download: ML20084K565 (1)

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Telecopy: Reeli on lil , Attention: Mr. C. Feierabend I - w? j h.\.' , ,I', r& IJ i

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J . Kcppler, Regional Director Directorate of Regulatory Onerations Region til U. S. Atomic Energy Cormission 799 Roosevelt Road Glen Ellyn, Illinois 60137 Ref e ren ce: 0uad-Citics Nuclear Power Station, Uni t 2 Docket t'o. 50-265, DPil-30

• Appendix A, Secticns 1.0. A .2, 3.2.0, Table 3,2,2 and 6.6.B.l.a

Dear Mr. Keppler:

The purpose of this letter is to provide you uith notification of the above referenced Abnormal Occurrence as required by Technical Specification 6.6.8.1.c within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence.

\! bile performing the weekly functional test on level switch LIS 2 -263-72 D cccording to our interin corrective action of. Abnorraal Occurrence Rerort A0 50-265/74-13 on July 10, 1974, the switch failed to actuate. After being lightly tapped by the instrument nochanic, the switch operated satisfactorily six tires.

Considering the possibility that the ucenetic trip mechanism was r.iiscligned, the mechanisa was disassembled and re-aligned. The switch will continue to uc functionally tested on a weekly basis until the new level switch that is orcered is received cnd installed.

This occurrence was discussed with Mr. C. Feierabend of your of fice on July 11, 1974,'of telephone. Slocc the ccm,31cte dcta!!, cf the previces cccurrence ~ 1-+ u to this switch are reported in A0 50-265/7'>-13, by agrec. ment with year representa-tive, the 10-day wri t ten report for the present occurrence will be submitted follcwing installation of the new switch. The corrective actions cf the previa s report are still in effect.

Very truly yours, COPM0iNEALTil CDIS0tl COMPAMY QUAD-CITIES i:UCLEAR PC.lER STATION f a ', / 7 *

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7'2 COPY SENT REGION,