ML19340C179
| ML19340C179 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 11/06/1980 |
| From: | Carroll J JERSEY CENTRAL POWER & LIGHT CO. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| RO-80-49-049P, RO-80-49-49P, NUDOCS 8011140100 | |
| Download: ML19340C179 (3) | |
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Boyce H. Grier Directorate of Regulatory Operations Region I-631 Park Avenue King of Prussia, Pennsylvania' 19406 -
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FROM:
Jersey Central Power & Light Company Oyster Creek Nuclear Generating Station Docket No. 50-219 Forked River, New Jersey 08731 I
SUBJECT:
Reportable Occurrence Report No. 50/219/80-4R/IP The following is a preliminary report being submitted in compliance with the Technical l
Specifications, paragraph 6.9.2.a.(3) and 6.9.2.b.(2).
i Preliminary Approval:
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. T. Carroll, Jr. '/
Director Oyster CreeV perations Date: November 6, 19 cc:
Mr. Roger Boyd
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0YSTER CREEK NUCLEAR GENERATING STATION Forked River, New Jersey 08731 License Event Report Reportable Occurrence No. 50-219/80-49/IP Report Date l
November 6, 1980 Occurrence Date November 5, 1980 Identification of Occurrence Degradation of the reactor coolant pressure boundary and primary containment when the Isolation Condenser vent isolation valves (V-14-1 and V-14-19) for Isolation Condenser "B" were suspected to have failed to close and also operation i
in a degraded mode as per Technical Specifications section 3.8.C.
This event is considered to be a reportable occurrence as defined in the Technical Specifications, paragraph 6.9.2.a.(3) and 6.9.2.b.(2).
C6nditions Prior to Occurrence The plant was operating at steady state power.
Plant parameters at the time of occurrence were:
Power:
Core 1737 MWt Electrical 535 MWe 4
' Flow-Recirculation 14.6 x 10 gpm i
Feedwater 5.9 x 106 lb/hr
' Description of Occurrence i
On Wednesday, November 5,1980, at about 1400 hours0.0162 days <br />0.389 hours <br />0.00231 weeks <br />5.327e-4 months <br />, while removing Isolation Condenser "B" from service to repair a steam leak on vent isolation valve V 19, vent isolation valves V-14-1 and V-14-19 for the condenser failed to close (by the valve position indication) when operated from the control room.
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i Reportable Occurrence Page 2 Report No. 50-219/80-49/IP Apparent Cause of Occurrence The cause of the occurrence is still under invastigation.
Analysis of Occurrence l-The vent lines from each of the isolation condenser loops to the main steam lines downstream of the main steam line isolation valves (MSIV's) are provided with isolation valves.
These valves close automatically on' isolation condenser actuation or on signals which close the MSIV's.
Failure of these valves to close would have resulted in a degradation of the reactor coolant pressure boundary and primary containment.
Corrective Action Immediate corrective action -was to perform an operability check on Isolation Condenser System "A" and then close the steam inlet valves to Isolation Condenser "B".
Failure Data Skinner Precision Industries Skinner /Uniflow Valve Division 3/4" Type 800 straight through valve Serial #'s 1021C (V-14-1) 1021E (V-14-19) i I
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