ML20086J101

Telecopy AO 75-1:on 750102,inboard Main Steam Line Sample Isolation Valve Appeared to Be Not Fully Closed.Cause Unknown.Daily Log of Other Operable Isolation Valves Instituted

ML20086J101
Person / Time
Site:	Peach Bottom
Issue date:	01/03/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J095	List: ML20086J092 ML20086J101
References
AO-75-1, NUDOCS 8401230174
Download: ML20086J101 (1)

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."~ 'Cen Mrnid RC S ' 1*1'oln'c1.t' ann ?'.

A.E.C. Region 1 kegulatory Operations of f ice, on- January 3,19/5.

Re Tc r e ne c . I,I c e ni;c T*u.2 ci_ , .IW ..A._

p, Technieni Spec.i ficat ion Ref er enec: 3.7.D Report 1;o . : 50-278-75-1 ' '~

Report Date: Janua ry 3.1975 Occurrence Date: January 2, 1975 Peach Dot ton A tonnic Power Station

.,7 Facility:

R.D. 1, Delta Fennsylvania 17314 fj6 . \

Identification of Occut rence:

Unit 3 inboard c:ain secan line sarnple inolation valve'not f t.1.ly c losed .

Conditions prior to Occurrence: ,

The rem. tor vi:n oper:: tin;; at 'J5.1% power . Startup testity: vas in pronrer.n.

Description of Occurrenec:

It was dincovered tlut t M inboard ratin r.tean line snr.ple ir.ola t ion valve vould not Isointe when the control avitch vas placed in the close per.ition.

The outboard inolation valve war, ictr.edintcly closed.

Designation of Apparent. Caur.e of Occurrence:

Unknown at this time. Requirco dryvc11 entry to investigate.

Analysis of Occurrence:

The other isolntion valve in thic line was verified to clor.e properly and was Icft in L t.e c lo. sed per.it ien. For this r e a ., u n , the occurrence hnr, snin in 11 r.afrty i g ications.

Corrective Action:

As rer,uired by the Ter.bnical Specificatlons, a daily log of the othei operable isolation valve was tw.ettiately inntItuted in the forn of an

- cr.tablir.hed r:n vc J 11nnt e test which verificn that the position of the o t t.c r isoint ion valve (in the r.ane line) i t. I n t.hc c lot ed o r l i.ol a t ed condition.

Failut e t>nta :

A previous failure of this type vas reported nr. Abnormal Occurrence Tirport Nutaber 50-27c-74-15.

8401230174 750122 Very truly yourt., {DRADOCK 05000278

.*. PDR

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V. T. Ullrich, Superintendent Prach 14ttoc At enic Powr St ation M5 e, .ca i tWGLON I ' <.a -

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