ML20084S183

Telecopy Ao:On 750817,following Maint Outage,Reducer of Low Flow Feedwater Regulating Valve 2-643 Severed Due to Vibration.Unit Manually Scrammed & Reactor Level Maintained W/Rcic Sys

ML20084S183
Person / Time
Site:	Quad Cities
Issue date:	08/18/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S185	List: ML20084S183
References
NJK-75-422, NUDOCS 8306160205
Download: ML20084S183 (1)

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Post Tc!cphone Offico Bok 216 309/654-2241 ,

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Telecopy: Region lit, Attention: Mr. C. Feierabend , kg ./l

-August 18, 1975 J. Keppler, Regional Di rector Office of Inspection and Enforcement Region 111 -

U. S. Nuclear Regdiatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137 ,.

Reference:

Quad-Ci ties Nuclear Power Station, Uni t 2 Docket No.' 50-265, DPR-30 Appendix A, Sections 1.0.A.5, 6.6.B.I.a

Dear Mr. Keppler:

The purpose of this letter is to provide you with notification of an Abnormal Occurrence as requi red by Techni cal Speci fication 6.6.B. I .a wi thin 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> of the occurrence.

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On August 17, 1975 while bringing Unit Two back to power following a mainten-ance outage, the 6" to 4" reducer on the downstream side of low flow feedwater regulating valve, 2-643, severed due to vibration incurred while transferring f rom the low flow feedwater regulating valve to the ' main feedwater regulating valve.

The unit was manually scrammed and the reactor level was maintained with the RCIC system. Although contaminated water was introduced into the oil separator none was released to the environs. ,

This occurrence was discussed by telephone with Mr. Knop of your office on August 17. 1975 Further information'will be provided by Abnormal Occurrence Report [A0 50-265/75-31)vhich will be submitted within 10 days of the date of this occurrence.

Very truly yours, COMMONWEALTH EDISON COMPANY

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QUAD-CITIES NUCL AR POWER STATION l / h

/Y- g.,jI.b'?f N. J. Kallvianakis Station Superintendent ,

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.cc: Of fice of Nuclear Reactor Regulation G. A. Abrell

, 8306160205 750827 PDR ADOCK 05000265 S,, PDR _