ML20086H844
| ML20086H844 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/28/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso Office of Nuclear Reactor Regulation |
| References | |
| AO-75-36, NUDOCS 8401200289 | |
| Download: ML20086H844 (2) | |
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.A PHILADELPHIA ELECTRIC COMPANY #
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A g Yt%d May 28,1975 Mr. A. Giambusso Director Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Giambusso:
Subject:
Abnormal Occurrence The foilowing occurrence was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, United States Nuclear Regulatory Commission on May 19, 1975 Written notification was made to Mr. James P. O'Reilly, Region I, Of fice of Inspection and Enf orce-ment, United States Nuclear Regulatory Commission on May 19, 1975 In accordance with Section 6 7 2.A of the Technical Specifications, Appendix A of DPR-44 for Unit 2 Peach Bottom Atomic Power Station, the following occurrence is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-44 Technical Specification
Reference:
4.7 A.2.f Report No.:
50-277-75-36 Ecport Date:
May 28,1975 Occurrence Date: May 18, 1975 Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Excessive leakage through the long path racirculation valve (M0-2663).
Conditions Prior to Occurrence:
Unit 2 shutdown.
_ Description of Occurrence:
During a routine local leak rate test of the long path re-circulation valve M0-2663, this valve was found to leak in excess of 2000 cc/ min. The method of testing was with air at 50 psia.
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Mr'. A. Giambusso 50-277-75-36 May 28,1975 Page 2 Designation of Apparent Cause of Occurrence:
Under investigation.
Analysis of Occurrence:
'Under normal operating conditions M0-2663 is closed. This valve is downstream of M0-38A and M0-38B, both of which had previously been found to be leak tight. M0-38A and M0-388 receive an is~olation signal above 600 psig reactor pressure. M0-2663 is the long path re-circulatiori valve which dumps to the condenser.
Safety implications of this occurrence are minimal.
Corrective Action:
The valve has been disassembled for inspection and minor indications on the seating surfaces noted. A seat lapping tool is being fabricated for valve repair..The valve will be repaired, re-assembled and tested as soon as possible.
Failure Data:
I:
None.
Vety-truly yours,,
[ Q lime S j[c-M. J. Cooney f
Ass't Gen'1 Superintendent Generation Ci,ision cc:
Mr. J. P. O' Reil ly Director, Region i Office of Inspection.and Enforcement United States Nuclear Regulatory Cannission 631 Park Avenue King'of Prussia, PA 19406 e
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