ML20037B773
| ML20037B773 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 11/24/1980 |
| From: | Ullrich W PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| RO-03-80-27-1P, RO-3-80-27-1P, NUDOCS 8012010289 | |
| Download: ML20037B773 (2) | |
Text
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PHILADELPHIA ELECTRIC COMPANY Peach Bottom Ato=ic Power Station Delta, Pennsylvania 1731k November 2% 1980 Mr. Boyce H. Grier Office of Inspection and Enforcement Region 1 United States Regulatory Cossaission 631 Park Avenue ICZag of Prussia, PA 19h06
SUBJECT:
REPORTABLE OCCURRENCE - PROMPT NCf"IIIICATIO)'
Confi29mine R. S. Fleischmann's Conversation with Mr. Cowgill on November 24, 1980.
Reference:
Docket No. 50-277 Peach Botton Unit 3 Technical Specification
Reference:
3.5.C Report Ec. 3-80-27/IP Occurrence Date:
November 2h. 1980 Identification of Occurrence:
i With the Unit operating at 995 power while performing HPCI Surveillance Test 6.5 MD-3-23-1k EPCI Steam to Turbine Valve kept driving in the close direction causing the valve fuses to blev.
Conditions Prior to Occurrence:
Unit 3 operating at essentially full power; Unit 2 operating at T9 25 power.
Apoarent cause of Occurrence:
The torque switch which opens the feed to the close circuit of the valve fathd to open, which caused the motor to keep driv-ing the valve in the clamed direction until the motor fuses blev.
Analysis of Occurrence:
The Unit 3 HPCI system was inoperable for approvintely one half hour until tame fuses were replaced.
During this time all other Unit 3 BCCS systems were sparshle.
Due to the short period of inoperability safety significance is
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Currective Action:
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[ EThe EPCI valve h 3-23-lk elosing torque switch was inspected, readjusted and n-N valve was stroked satisfactorily.
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,Trevious Failures.
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Very truly yours,
-? ! An
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- v. T. Ullrich Station Stgerintendent WTU: cat I
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