ML20086G919
| ML20086G919 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/20/1975 |
| From: | Meyer R PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20086G920 | List: |
| References | |
| AO-75-27, NUDOCS 8401120602 | |
| Download: ML20086G919 (2) | |
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PHILADELPHI A ELECTRIC COM PAyy
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May 20, 1975
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Mr. A. Giambusso Director Division of Reactor Licensing Office of Naclear Reactor Regulations United States Nuclear Regulatory Commission Washington, DC 20555
Dear Mr. Giambusso:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Don Caphton, Region 1, Of fice of Inspection and Enforcement, United States Nuclear Regulatory Commission on May 10, 1975 Written notification was made to Mr. James P. O'Reilly, Region 1, Of fice of Inspection and Enf orcement, Jnited States Nuclear Regulatory Commission on May 12, 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 occurrence is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-56 Technical Specification
Reference:
4.7.D.I.a, 4 7.D. l.b(1), and Table 3 7 1 Report No.:
50-278-75-27 Report Date:
May 20, 1975 Occurrence Date: May 10, 1975 Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Excessive leakage of SV-3671C on penetration N-51C.
Conditions Prior to Occurrence:
Unit 3 at approximately 100X power.
Description of Occurrence:
During a routine surveillance test, ST 6.2 PCIS Normally Open Valves, this inboard isolation valve would not fully close.
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Mr. A. Giambasso Page 2 May 20, l 'f 7 5
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Desi1 nation of Apparent Cause of Oc currence; Due to the repeated failures, it appears that the valve in-ternals ar~ failing to seat properly.
Analysis of Occurrence _:
is minimal because The safety implication of this occurrences alve SV-3 37dC was f ound to oper ate the oatboard isolation isolation valve has been closed and In addition, the upstream manual SV-3o71C has been repaired and satisf actorily will remain closed until tested.
Corrective Action:
New valse internals hase been ordered. When received, the valve will be disassembled, repaired and retested.
Failure Data:
Three previoas failures of this valve have been reported as 11/9/73 A0-50-278-75-26, as A0-50-278-75-i l, and on I
Ver y truly yours, g
R. D. Meyer General Superintendent Generation Division cc:
Mr. J. P. O'Rei l ly Director, Region 1 Office of Inspect ion and Enf orcement Jni ted St ates Nac lear Regulator y Commi s sion o31 Perk Avenue Kinj of Prussia, PA 13400 5
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