ML20086F843
| ML20086F843 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 12/05/1975 |
| From: | Cooney M PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Boyd R Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20086F847 | List: |
| References | |
| A-75-77, A0-75-77, NUDOCS 8401090585 | |
| Download: ML20086F843 (2) | |
Text
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PHILADELPHIA ELECTRIC COM,PANY 23O1 MARKET STREET J. l,,
PHILADELPHI A. PA.19101
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i e.?d (215) 841-40o0 i
,L December 5, 1975 f
Mr. Roger S. Boyd
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Acting Director Division of Reactor Licensing Office of Nuclear Reacter Regulations United States Nucicar Regulatory Commission Washington, DC 20555
Dear Mr. Boyd:
Subject:
Abnormal Occurrence The following occurrence was reported to Mr. Lief Norrholm, Region 1, Office cf Inspection and Enforcement, United States Nuclear Regulatory Commission, on November 28, 1975 Written notification was made to Mr. James P. O'Reilly, Region 1, Office of Inspection and Enforcement, United States Nucicar Regulatory Commission on December 1, 1975 In accordance wi th Section 6.7 2. A of the Technical Specifications, Appendix A of DPR-44.for Unit 2 Peach Bottom Atomic Power Station, the.
following report is being submitted to the Directorate of Reactor Licensing as an Abnormal Occurrence.
Reference:
License Number DPR-44 Technical Specification
Reference:
4.5.G Report No.:
50-277-75-77 Report Date:
December 5,1975.
Occurrence Date:
November 26, 1975 Facility:
Peach Bottom Atomic Power Statinn R.D. 1, Delta, Pennsylvania 17314 Identification of Occurrence:
Fa'ilure of LS-4223 to operate SV-4223 (RHR Head Spray Line High Point Vent) on low accumulator level.
Conditions Prior to Occurrence:
~
Unit 2 shutdown.
Description of Occurrence:
Upon receipt of the head spray accumulator low icvel alarm, investigation revealed that the vent solenoid valve f ailed to open to refill the head spray high point accumulator.
5 751205 IU76d 05000g S
I Mr. ' Roger S. Boyd
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..J December 5,1975 Page 2 Designation of Apparent Cause of Occurrence:
e The fuse in the solenoid valve circuit was found blown.
Investigation revealed a ground in the solenoid valve circuit. The ground'ias corrected and the accumulator returned to normal service.
Analysis of Occurrence:
There are no safety implications because the Icvel switch alarmed properly and the operator was abic to manually perform the function of the vent solenoid valve.
Corrective Action:
The operator manually vented the accumulator to ensure that the head spray line was maintained filled. The head spray accumulator low icvel alarm was operabic at all time. Until the time when the accumulator vent valve was returned to service, the accumulator could be manually vented. The grounded wire was repaired and the vent valve returned to service.
Failure Data:
Similar f ailures reported as A0-50-277-75-4, 50-278-75-20, 50-277-75-34, 50-277-75-44 and 50-278-75-62.
Very truly yours,
/
M.
. Cooney Su erintendent
. Generation Division - Nucicar cc:
Mr. J. P. O'Reilly Director, Region 1 Office of Inspection and Enforcement U.S. Nucicar Regulatory Comnission 631 Park Avenue King of Prussia, PA 19406 e
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