ML20086J086

Telecopy Aao 75-3:on 750105,possible Cracks Detected in Recirculation Pump Discharge Valve 4-inch Bypass Line Piping.Cause Unknown.Radiographs Made & Verified of Area Where Defects Were Believed to Exist

ML20086J086
Person / Time
Site:	Peach Bottom
Issue date:	01/06/1975
From:	Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML20086J083	List: ML20086J081 ML20086J086
References
AO-75-3, NUDOCS 8401230161
Download: ML20086J086 (1)

Text

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Pc ADELPHIA ELECTRIC COMPANY Bottom Atomic Power Station g fh Delta, Pennsylvania /O g ddMfe Mj I - -

17314 - f&/fI J nuary 6, 1975 Mr. James P. O'Reilly, Director United States Atomic Energy Commission Directorate of Regulatory Operations 631 Park Avenue _

King of Prussia, Pennsylvania 19406 9,$i;o *! ,

gg, .s. O subject: Abnornal Occurrence 24-Hour Notification M l":y L, hy 1

0 l!I,e .

s .-

Confirming W. T. Ullrich's phone conversation with Mr. Walt Baunack, --

1,;'.3 J %

A.E.C. Region 1 Regulatory Operations Of fice on January 5,1975.

la f erence: License Number DPR-56 Technical Specification Reference 1.0.D.5 Report No.: 50-278-75-3 Report Date: January 5, 1975 ,

Occurrence Date: January 5, 1975 Facility: Peach Lottom Atomic Pouer Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:

Possible cracks in recirculation pump discharge valve 4 inch, bypass line - -

piping. ,

Conditions Prior to Occurrence:

Unit 3 shutdown. Primary coolant temperature approximately 150*r.

1)escription of Occurrence:

As a result of the ultrasonic inspection of the 4 inch piping associated

~

with the recirculation pump disc.harge valve on the Unit 3 reactor, three --

indications of cracks on the internal surface of the 4 inch piping were noted.

liesignation of Apparent Cause of Occurrence:

Unknown at this time.

Analysis of the Occurrence:

This occurrence did not result in any primary coolant leakage to th'e drywell.

Indications are believed to have locat.ed very small cracks of minimal depth.

Safety implications are minin11.

Corrective Action:

In order to verify the data obtained by ultrasonic testing, radiographs were made of the area where tuo defects were believed to exist. These radiographs verified the defectn.

Action is in progress to remove the section of piping containing the -.

sucpected defects. Nw piping will be installed in this area in accordance

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uith .in approved prt'ctdure.

{ ,

r.i i l u r t. Data: ,

None previous at the Peach Lottom site, l' ..

8401230161 750115 Very truly yours, ..

DR ADOCK 05 GOO 27 p,"Apf,",g, W. T. UlJ rich, Superint endent

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