ML20084K206

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Ao:On 740723,left Hand Switch of Reactor Low Pressure Instrument PS-1-263-52B Tripped.Switch Recalibr.Further Info Will Be Provided in AO-50-254/74-25 within 10 Days
ML20084K206
Person / Time
Site: Quad Cities Constellation icon.png
Issue date: 07/23/1974
From: Kalivianakis N
COMMONWEALTH EDISON CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084K201 List:
References
NJK-74-170, NUDOCS 8305190210
Download: ML20084K206 (1)


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Ouad-Citic4-denerating Station i

A, PoS! OfflCe box 216 N' d Cordova,lilinois 61242 h',r.

Teiephone 309/654-2241 NJK-74-170 d

Telecopy: Region lil', Attention:

Mr. C. Feierabend

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I J. Keppler, Regional Director 3b Directorate of Regulatory Operations q,

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U. S. Atomic Energy Commission 5 0 - p ~ u-799 Roosevelt lioad Glen Ellyn, Illinois 60137

Reference:

Quad-Cities Nuclear Power Station, Unit i Docket No. 50-254, DPR-29, Appendix A Sections 1.0.A.2, 3.2.B, and Table 3.2.2

Dear Hr. Keppler:

The purpose of this letter is to provide you with notification of an Abnormal Occurrence as required by Technical Specification 6.6.B.I.a within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence, i.n.si.

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the lef t hand switch of PS-1-263-528, tripped at 355 psig decreasing, thus violating Technical Specifications 3.2.B and Table 3.2.2.

The instrument was inspected and no visible defects were found. The switch was re-calibrated to trip within the acceptable range.

This occurrence was dis ~ cussed by telephone with Mr. Feierabend of your office on July 23, 1974. Further information will be provided by Abnormal Occurrence Report A0 50-254/74-25 which will be submitted within 10 days of the date of

.this occurrence.

Very truly yours, COMMONWEALTH EDISON COMPANY QUAD-CITIES NUCLEAR POWER STATION

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N..'. Kalivianakis Station Superintendent 1.

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