ML20084S818

Telecopy Ao:On 750414,three of Four Pressure Switches Tripped Below Tech Specs Limit.Switches Recalibr. Surveillance Frequency Increased to Weekly Basis

ML20084S818
Person / Time
Site:	Quad Cities
Issue date:	04/16/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S817	List: ML20084S814 ML20084S818
References
NJK-75-201, NUDOCS 8306170441
Download: ML20084S818 (1)

Text

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y-p Telephone 309/G54-2241 I flJ K-75-201 I Telecopy: Region lit, Attention: Mr. C. Feierabend -

April 16, 1975 ,

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,o J. Keppler, Regional Director s ./

Directorate of Regulatory Operations Region ill '

U. S. Nuclear Regulatory Commission ' '-

799 Roosevelt Road Glen Ellyn, Illinois 60137

Reference:

Quad-Ci tics !!uclear Power Station , Uni t 1 Docket No. 50-254, DPR-29 Appendix A, Sections 1.0.A.2, 3.1, 6.6.B.I.a

Dear Mr. Keppler:

The purpose of this letter is to provide you with notification of an Abnormal Occurrence as required by Technical Specification 6.6.D.1.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. s.

At 5:00 p.m. on April 14, 1975, with Unit 1 operating at 800 tiWe, while perform-ina surveillance testina on the EHC fluid low oressure sensors, it was discovered that three of the four pressure switches tripped below the Technical Specification setpoint of > 900 psig. The switches were recalibrated to .>930 psig.

Due to the inordinate amount of setpoint drift experienced with these pressure switches, the surveillance frequency is being increased to weekly and an action item is being submitted to the engineering department to investigate and procure a more reliable type of pressure switch.

This occurrence was discussed by telephone with Mr Feierabend of your office on April 15, 1975 Further information will be provided by Abnormal Occurrence Report A0 50-254/75-8 which will be submitted within 10 days of the date of this occurrence.

Very truly yours, COMM0llWEALTil EDISON COMPAfiY QUAD-CIT ES NUCLEAR POWER STATION

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! ). J. Kalivianakis -

Station Superintendent t -

NJK/SRil/j ch cc: Directorate of Licensing ~,

J. S. Abel ggO!

8306170441 750421 PDR ADOCK 05000265 PDR S

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