ML20084S652

Telecopy Ao:On 750528,pressure Switch 1-5600-PS-3 Tripped Below Tech Spec Limit.Switch Recalibr.Surveillance Frequency Increased from Quarterly to Weekly

ML20084S652
Person / Time
Site:	Quad Cities
Issue date:	05/29/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084S642	List: ML20084S639 ML20084S652
References
NJK-75-298, NUDOCS 8306170149
Download: ML20084S652 (1)

Text

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i. .[ /+ dr' .k' Quad.:C(ads Nuctcar Power Station h '

3 Post Othee Box 210 /v d ' .JO. .

'k ' ~~ [ Cordova. Illinois'61242 Telephone 309/654 2241

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JUNs 1975 %

ilJK-75-298 DA n cne t-r. as:p tum C A a'

,  ;, y a.,w o A Teiecopy:

Region lil, Attention: Mr. C. Fel e rabend y.,Q' <N M um5 (O/.

Hay 29, 1975

• 774ig

= . . . . -

~ '

'J. Keppler, Re'gional ' Di rector . . .

.~ ~

Directorate of Regulatory Operations ' '

Region lli U. S. iluclear Regulatory Commission -

799 Rooseve.it Road Glen Ellyn, l'Illnois 60137 -

Reference:

Quad-Ci ties fluclear 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 Ab-

. normal Occurrence as requi red by Techni cal Speci fi cation 6.6.B.'l .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. . ,

" ~

, At 11 :00, a.m. cri itay 20, 1975, while performing routine surveillancCtesting- ~~ l-

on the electrohydraulic control system low pressure sensors, pressure switch I-5600-PS-3 tripped at 890 PS! C, which is below the Techni. cal Speci fication limit 'f o> 900 PSIG. The swi tch was then recalibrated to 935 PSI G.

Due to the f requency of setpoint drif t beyond the limi ts for these swi.tches, the surveillance f requency has been increased from quarterly to weekly and-an action i tem has been issued to- the station Nuclear Engineering Department, to investigate possible replacement switches. - - - --

This occurrence was discussed by telephone with Mr. Feierabend of your ~ office on May 29, 1975 Further information wi11 be provided by Abnormal Occurrence

. Report A0'50-254/75-15 which will be submitted within 10 days ~of the'date-of" this occurrence.

Very truly yours, _

COMMONWEALTil EDISON COMPAllY .

QUAD-CITIES NUCLEAR POWER STATION je /W(/^/ r p ,r.w

.Ah it.':.Ejyh A .,

-N. J. Kalivianakis Station Superintendent ,

NJK/SRH/lk ,

cc: Director-of Of fice of Nuclear Reactor Regulation J. S. Abel ,

8306170149 750606:

L PDR ADOCK 05000254 (3 PDR e**%" .