ML20086F918

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AO 75-70:on 751104,reservoirs of Five Hydraulic Snubbers Found Empty.Caused by Leaking O-rings & Gaskets.Defective Gaskets & O-rings Will Be Replaced
ML20086F918
Person / Time
Site: Peach Bottom Constellation icon.png
Issue date: 11/14/1975
From: Cooney M
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To: Boyd R
Office of Nuclear Reactor Regulation
Shared Package
ML20086F921 List:
References
AO-75-70, NUDOCS 8401090664
Download: ML20086F918 (2)


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D.p PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADELPHIA. PA.19101 (2151841 4000 1];

'O November 14, 1975 l'

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Mr. Roger S. Boyd

'Ov Acting Director Division of Reactor Licensing i

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Office of Nuclear Reactor Regulations United States Nuclear Regulatory Commission

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Washington, DC 20555

Dear Mr. Boyd:

Subject:

Abnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Of fice of Inspection and Enforcement, United States Nuclear Regulatory Comission, on November 5,1975 Written notification was made to Mr. James P. O'Reilly, Of fice of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Comission on November 5, 1975 In accordance with Section 6 7.2.A of the Technical Specifications, Appendix A of DPR-44 f or Unit 2 Peach Bottom Atomic Power Station, the f ollowing report is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.

Reference:

License Number DPR-44 Technical Specification

Reference:

4.11.D.1 Report No.:

50-277-75-70 Report Date:

November 14, 1975 Occurrence Date:

November 4, 1975 Facility:

Peach Bottom Atomic Power Station R.D. I, Delta, Pennsylvania 17314 Identification of Occurrence:

Inoperable hydraulic snubbers.

Conditions Prior to Occurrence:

Maintenance outage in pr ogress, reactor shutdowr..

Description of Occurrence:

During a routine inspection of the Unit 2 hydraulic snubbers, the reservoirs of five hydeculic snubbc.s were found empty.

8401090664 751114

{DRADOCK05000 COPY SENT REGION QM9

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  • ' Mr. Rogcr S* B 50-277-75-70 November 14, 1973 Page 2 l

_ Designation of Apparent Cause of Occurrence:

Inspection revealed Icaking 0 rings and gaskets.

Analysis of Occurrence:

i Inspection indicated no damage of piping or supports. The i

discovery of the empty reservoirs by this routine inspection demon-l strates the merits of the surveillance program.

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Corrective Action:

The defective gaskets and 0 rings will be replaced.

Following repair, the snubbers will be checked in a test stand for proper operating capabilitics and leaks.

a Failure Data:

A similar f ailure on Unit 2 hydraulic snubbers was reported as A0-50-277-74-45 4

Very truly yours, i

M.

Cooney i

Su rintendent 1

Generation Division - Nuclear cc:

Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission

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631 Park Avenue i

King of Prussia, PA 19406 i

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