ML20086J443
| ML20086J443 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 09/28/1974 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| AO-74-8, NUDOCS 8401230682 | |
| Download: ML20086J443 (2) | |
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PHILADELPHIA ELECTRIC COMPANY 50-278 2301 MARKET STREET
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PHILADELPHI A. PA.19101
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~ 0GT3 September 28, 1974 Mr. A. Giambusso Deputy Director of Reactor Projects United States Atomic Energy Commission Directorate of Licensing Washington, D.C.
20545
Dear Mr. Giambusso:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, A.E.C. Region 1 Regulatory Operations Office on September 19, 1974.
Written notification was made to Mr. James P. O'Reilly, Region i Regulatory Operations Office on September 19, 1974.
In accordance with Section 4.7.2.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 Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-56 Technical Specification Reference.3.5. A.3 Report No.:
50-278-74-8 Report Date:
September 28, 1974 Occurrence Date:
September 18, 1974 Facility:
Peach Bottom Atomic Power Station R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Inoperable hydraulic snubber.
Conditions Prior to Occurrence:
Maintenance outage in progress.
Reactor shutdown.43-878,
8401230682 740928 PDR ADOCK 05000278 8
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Mr.A.Giambu%74
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September 28, Pc.g 3 2 o..%
Description of Occurrence:
During a routine inspection of the Unit 3 hydraulic snubber during a plant maintenance outage, hydraulic snubber 3-lO-HB-5-7 was observed to have become inverted resulting in the draining of all hydraulic fluid out of the reservoir vent.
Designation of Apparent Cause of Occurrence:
Investigation indicates that the locknut which prevents rotation of the snubber mechanism was not tightened properly.
Analysis of Occurrence:
The defective snubber is installed on the discharge piping of the "B" RHR pump for seismic support only.
It serves no function during normal plant operations.
Corrective Action:
The snubber was correctly positioned and the locknut adequately tightened.
The reservoir was filled to the correct level and the piston was stroked several times to remove all air from the hydraulic system.
All similar snubbers, which were readily accessible (approximately 525) were inspected and found i
to be tight.
Failure Data:
There is no record of a similar failure.
Very truly yours,
- 1. J. Cooney Ass' Gen'l Super ntendent Gene ation Division cc:
J.
P. O'Reilly Director, Region 1 United States Atomic Energy Commission 631 Park Avenue King of Prussia, PA 19406 t
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