ML20086G906
| ML20086G906 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/29/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC) |
| Shared Package | |
| ML20086G908 | List: |
| References | |
| AO-75-29, NUDOCS 8401120593 | |
| Download: ML20086G906 (2) | |
Text
i O
O i
v v
l PHILADELPHIA ELECTRIC COMPANY
\\
a N
2301 MARKET STREET N'-
Q""'i :, l l, l
i PHILADELPHI A. PA.19101
'C' JiSJ2 103 h
- ~
2 si e4i.4ooo p?
,.,. m j7 r.
May 29, 1975 4y Mr. A. Giambusso, Di rector
' ( N../
Division of Reactor Licensing Office of Nuclear Reactor Regulations United States Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Giambusso:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Walt Baunack, Region 1, Office of Inspection and Enforcement, Uni ted States Nuclear Regulatory Commission on May 20, 1975. Written notification was made to Mr. James P. O'Reilly, Office of Inspection and Enforcement, Region 1, United States Nuclear Regulatory Commission on May 20, 1975.
In j
accordance wi th Section 6.7.2.A of the Technical Speci fications, Appendix A of DPR-56 for Unit 3 Peach Bottom Atomic Power Station, the following occurrence is being submi tted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-56 Technical Speci fication
Reference:
3.5.A Report No.:
50-278-75-29 Report Date:
May 29, 1975 Occurrence Date: May 19, 1975 Faci li ty:
Peach Bottom Atomic Power Station R.D. #1, Delta, Pennsylvania 17314 Identi fication of Occurrence:
Motor grounded on core spray injection valve 11A.
Condi tions Prior to Occurrence:
Reactor in cold shutdown.
4 Description of Occurrence:
During a closing stroke, the valve motor grounded and tripped its breaker.
Desinnation of Apparent Cause of Occurrence:
Investigation indicated that the motor had failed because the torque switch which de-energizes the operator motor at the completion of its closing stroke, fai led to operate.
Investigation is continuing " * [g t.m te into the cause of the torque switch failure.
8401120593 750529 PDR ADOCK 05000278 S
p_
(-
U
(_/
1 Mr. A. Giambusso 50-278-75-29 May 29, 1975 Page 2 Analysis of Occurrence:
There was no safety significance associated wi th this occur-rence since the plant was in the cold shutdown condition.
Corrective Action:
The damaged motor was replaced and the torque switch removed and inspected. A heavy buildup of grease was renoved from the Bellville washer section and the grease bypass line. The operator was stroked successfully and returned to service.
Investigation is continuing.
Failure Data:
A0-50-277-74 failure of Core Spray valve Motor.
Very truly yours,
.s 7
( ) ',, l b OC
[yet-M. J. Cooney Asst. General Superintendent Generation Division Mr. James P. O 'Rei l ly, Di rector cc:
Office of Inspection and Enforcement, Region i United States Nucicar Regulatory Commission 631 Park Avenue King of Prussia, PA 19406 l
1 1
1 k