ML20086J455

Telecopy AO 74-8:on 740918,hydraulic Snubber Found Inoperable.Caused by Locknut Not Tightened Properly.Snubber Being Returned to Svc in Proper Position W/Locknut Properly Tightened

ML20086J455
Person / Time
Site:	Peach Bottom
Issue date:	09/19/1974
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J448	List: ML20086J446 ML20086J451 ML20086J455 ML20086J459
References
AO-74-8, NUDOCS 8401230697
Download: ML20086J455 (1)

Text

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^Mk ggg Peach Botton Atcnnic Power Station Delta, ?cnnsylvania .

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. 17314 September 19, 1974 Mr. James P. O'Reilly, Direc 'r United States Atomic Energy Coc=ission _

Directorate of Regulatory Operations

. .p-631 Park Avenue 4f; O King of Prussia, Pennsylvania 19406 k,h.[-

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Subject:

Abnormal Occurrence 24-I!our Notification k,k17,3h

?< - .;.p Confirming W. T. Ullrich's phone conversation with Mr. Walt Baunack, A.E.C. h.i Region 1 Regulatory Operations Office on Septo =ber 19, 1974. M;!?l,7

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Reference:

i M "Q M. s License Number DPR-56 e.,.-

Technical Specification Reference 3.5.A.3 l .j%.

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Report No.: 50-278-74-8 l p:{;;[;, .;; ,y Report Date: September 19, 1974 u J c .5 1 Occurrence Data: Septaber 18, 1974 Facility: Peach Ecttc= Atomic Power Station I GQd

! 9'" [ ..[y R.D. 1, Delta, Pennsylvania 17314 U..n. 3

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Identification of Occurrence: l[P;.y Inoperable hydraulic snubber. g3.] i PE.

m.g;.);:p Conditions Prior to Occurrence: y Hafatenance cutage in progress. Reactor shutdown. 9

1.'&[b ;/.R Description of Occurrence

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During a routine inspection of the Unit 3 hydraulic snubber during a plant '

.- L;l caintenance outage, hydraulic onubber 3-1 0-113-5-7 was observed to have becoce M.Yd -

inverted resulting in the draining of all hydraulic fluid out of the reseWoir vent. Ia[ [' .: j z . (g,.

Designation of Apparent Cause of Occurrence:

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Preliminary investigation indicates that the lock nut which prevents rotation of the anubber cechanima was not tightened properly. I Analysis of Occurrence:

The defective snubber is installed on the discharge piping of the "B" RHR pump for seismic support only. It serves no f unction during nortal plant operations. The g losu of fluid from this snubber has minical safety significance.

Corrective Action:

The anubber is being returned to service in the proper position with the lock nut properly tightened. Additional investigation is in progress.

Failure Data:

Nene. 8401230697 740928 PDR ADOCK 05000278 s PDR Very truly yours, Q Q,Yi&,/

W. T. Ullrich, Superintendent,.

Pe' ach Botten Aconit-Power Station . ,

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