ML20084R987

Telecopy of AO 50-265/75-36:on 750831,during Shutdown, Instability Was Experienced on Feedwater Control Sys Which Caused 3/4 Inch Drain Lines to Sever from Low Flow Feedwater Regulating Valve.No Radioactive Matl Released

ML20084R987
Person / Time
Site:	Quad Cities
Issue date:	08/31/1975
From:	Kaliviahaki N, Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084R967	List: 05000265/LER-1975-036-01, /01T-0:on 750831,reactor Feedwater Sys Low Flow Drain Lines 2-3227-3/4-C & 2-3226-3/4-L Broke Off. Caused by Excessive Vibration.Lines Welded & Braced.W/ ML20084R987
References
NJK-75-439, NUDOCS 8306160097
Download: ML20084R987 (1)

Text

mI Commonwe:lth Edison l, 7 Quad Citi n: rating Station P:st Offic 216 (3

V

Cordov3, s61242 Td: phon 3309/654 2241 NJK-75-439 Telecopy:

Region III, Attention:

Mr. C. Feierabend August 31, 1975 J. Keppler, Regional Director Office of Inspection and Enforcement Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, Illinois 60137

Reference:

Quad-Cities Nuclear Power Station, Unit 2 Docket No. 50-265, DPR-30 Appendix A,. Sections 1.0.A.5, 6.6.B.l.a

Dear Mr. Keppler:

Tne purpose of this letter is to provide you with notification of an Abnormal Occurrence as required by Technical Specification 6.6.B l.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:

On August 31, 1975, while shutting down the unit, an instability was experienced on the feeddater control system which caused the 3/4 inch drain lines, both upstream and downstrqam of the low flow feed-2 water regulating valve, to sever.

The "B" normal flow regulation valve went fully open and the resultin6 reactor high water level turbine trip scrammed the reactor.

There were no radioactive materials released from the site as a result of this occurrence.

This occurrence was discussed by telephone with Mr. Knop of your office on August 31, 1975 m or information will be provided by Abnormal Occurrence Report 0 50-265MS-3fPwhich will be submitted within 10 days of the date f this occurrence.

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

/

l N. J. Kalivianakis Station Superintendent NJK/HAR/saa cc:

Office of Nuclear Reactor Regulation G. A. Abrell o[00065 Oc PDR

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