ML20084U540

Telecopy Ao:Main Steam Line Low Pressure Isolation Switch 2-261-30B Tripped Below Tech Spec Limit.Switch Recalibr

ML20084U540
Person / Time
Site:	Quad Cities
Issue date:	01/15/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084U525	List: ML20084U523 ML20084U540 ML20084U548 ML20084U571
References
NJK-75-32, NUDOCS 8306290109
Download: ML20084U540 (1)

Text

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Comm ^7 lth Ndison [] -' ".2r-',_.

.N Quad-CL jenerating Station eD- .S. ' Post Office Box 216 v

.N'J Cordova. Illinois 61242 Telephone 309/654-2241 IV g

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vp TELECOPY: Region Ill, Attention: Mr. C. Felerabend

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January 15, 1975 27 D2WfD$.

J. Keppler, Regional Director Directorate of Regulatory Operations Reglon iIi U. S. ATOMIC ENERGY COMMISSION 799 RooseveIt Road Glen Ellyn, IL 60137

REFERENCE:

Quad-Cities Nuclear Power Station, Unit Two Docket No. 50-265, DPR-30 r Appendix A, Sections 1.0. A.2, 3.2. A, 6.6.B. I .a.

Dear Mr. Keppler:

The purpose of this letter is to provide you with notification of an Abnormal

p. n 0ccurrence 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 /> i of the occurrence.

With Unit Two in the cold shutdown condition for the current refueling outage, quarterly surveillance testing of the main steam line low pressure isolation switches was conducted. Pressure switch 2-261-30B was found to trip at 846 psig thereby violating Technical Specification 3.2.A. The switch was recali-brated to a setpoint of 864 psig. The three other MSL low pressure switches were found to have setpoints of greater than 850 psig, and therefore would have performed the isolation, if low pressure had occurred.

This occurrence was discussed by telephone with Mr. Feierabend of your office on January 14, 1975 Further information will be provided by Abnormal Occur-

._ rence Report A0 50-265/75-5 which will be submitted within 10 days of the date

- of this occurrence.

Very truly yours, COMMONWEALTH EDISON COMPANY

. QUAD-CITIES NUCLEAR POWER STATION

. N. . Kallvianakis Vlv Station Superintendent [g Q <

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525 cc: Director' ate of Licensing J. S. Abel . ,

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8306290109 750124 PDR ADOCK 05000265 S PDR . COPY SENT REGION _

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