ML20084U197

Telecopy Ao:On 750320,surveillance Testing Revealed Turbine Electro Hydraulic Control Fluid Low Pressure Switch 1-5600- PS-2 Tripped Below Tech Spec Limit.Possibly Caused by Worn Piston Assembly.Assembly to Be Replaced

ML20084U197
Person / Time
Site:	Quad Cities
Issue date:	03/21/1975
From:	Kalivianakis N COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20084U194	List: ML20084U193 ML20084U197
References
NJK-75-146, NUDOCS 8306270463
Download: ML20084U197 (1)

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~ yOP ound.cn.ssenersting stauorr ostOmos Box 216' Cordova.lilinois 81242 Telephone 309/654-2241; g' ,

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ji Toiecopy:- RegTon. Til, Attention.: Mr C. Feierabend. 7 ,

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( March II, 1975. ,

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,p J.. Keppler, Regional Director ,

'F Directorate- of Regulatory Operations- ~ ,

t Region til , D 2.[ < U S. Nuclear Regulatory Commission ~

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d Glen Ellyn, I i i Tnois _ 6013T: '

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p Quad-Cities Docket No. 50-254, Nuclear Power Station, Unit.X:I Ql ?

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Append fx A Sect ions 1.0. A.2, 3.1, 6.6 8.1.a.. ^ ' ,4

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m C. Oscr Mr. lGepprier: -

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l i . Tha purpose of this letter is to provide you with notifTcation of an Abnornsi- -

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.' . Occurrence 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 /> of.

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,. 'T k tha occurrence ~ J ,, .  ? -

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At 3:00 p.m.. on March 20, 1975, witit Unit i operating'at 824 Mwe, quarterly-survalliance testing revealed that turbine EHC control fluid low pressure switch-

[(. 1-5600-PS-2 tripped at 885 psig decreasing. This exceeded the limit of n 900 g .

G ,psig required by TechnTcal Specifications Table 3.I.1.c.

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Aft 9r cyc! Tng the pTstort several times, the pis torr. movement became nore- free,- ,' 'W cnd without adjustment, the setpoint returned to 930 psig. 5 psig.below its- -

p normal .setpoint. It is believed that the piston.assembTy may be worn Tha worn ~ -

l ' piston assembly wf!! be replaced, and the piston assemblies of the other pressure ~ 4 switches will be inspected as soon as 'possible.. ,

' ;This occurrence was discussed by- telephone with Mr. Felerabend of your office on M rch 21 ,1975. Further information will b., provided by Abnormal Occurrence p, R2 port AO' 50-254/75-7 which. wr1T be submit':ed within 10 days of the date of this occurrence- -

'f Vory truly yours,.

y COMMONWEALTH EDI. SON. COMPANY U

QUAD-CITIES NU EAR POWER. STATION' -

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N.. J. Ka!!vianakis l

, Stati.on Supstintendent i

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J. S. Abel . -

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8306270463 750327 .

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