ML20086G970
| ML20086G970 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/21/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| AO-75-17, NUDOCS 8401130146 | |
| Download: ML20086G970 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET PHILADELPHIA. PA.19101 (2151841-4o00 March 21, 1975 g
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Dear Mr. Giambusso:
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Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, United States Nuclear Regulatory Commission on March 14, 1975 Written notification was made to Mr. James P. O'Rei l ly. Office of Insocction and Enforcement.
Region 1, United States Nuclear Regualtory Commission on March 14, 1975.
In accordance with Section 6 7 2.A of the Technical Specifications, Appendix A of DPR-56 for Unit 3 Peach Bottom Atomic Power Station, the following report is being submitted to the Directorate of Reactor l
Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-44 Technical Specification
Reference:
4 7.A.2.f Report No.:
50-278-75-17 Report Date:
March 21, 1975 Occurrence Date: March 13, 1975 Facility:
Peach Bottom Atomic Power Station R. D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Excessive Icakage through the Unit 3 Reactor Building to Torus Vacuum Relief Check Valve 26A.
Conditions Prior to Occurrence:
Plant at 100% power.
Description of Occurrence:
During a local leak rate test, the Reactor Building to Torus Vacuum Relief Check Valve was found to leak in access of acceptabic values.
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o Mr. A. Giambusso March 21, 1975 Page 2 Designation of Apparent Cause of Occurrence:
The cause of the check valve's failure to close tightly was deformation of the valve's rubber gas:<et seal.
Analysis of Occurrence:
The safety implications of this occurrence are minimal since the inner isolation valve (AO-3502A) was closed and sealed satisf actorily.
Corrective Action:
The valve was inspected, and the rubber gasket seal was re-positioned and cleaned. A local leak rate test was performed and the leakage was found to be acceptable. The 'B' Reactor Building to Torus Vacuum Relief Check Valve was also tested, and the Icakage was f ound to be acceptable.
Failure Data:
None.
Very truly yours,
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[ <;L-Ass't Gen't Superintendent M. J. Cooney Generation Division cc:
Mr. J. P. O'Reilly, Director Region 1 Office of Inspection and Enforcenent Uoited. States Muclear Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 t
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