ML20044C963
| ML20044C963 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 05/10/1993 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9305140216 | |
| Download: ML20044C963 (2) | |
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DUtWPOWER May 10,1993 i
U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555 Subject :
Catawba Nuclear Station, Unit 2 Docket No. 50-413 Special Report Vibration and Loose Parts Monitoring System Pursuant to Technical Specification 3.3.3.9, find attached a Special Report l
concerning the inoperability of the Unit 2 Vibration and Loose Parts Monitoring System channels 3 (Upper Reactor Vessel A) and 9 { Steam Generator A).
Very truly yours,
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M. S. Tuckman KEN /SR051093. LPM Attachment xc: S. D. Ebneter Regional Administrator, Region 11 R. E. Martin, ONRR W. T. Orders Senior Resident Inspector q;
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a SPECIAL REPORT l
CATAWBA NUCLEAR STATION, UNIT 2
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Vibration and Loose Parts Monitoring System Channels 3 and 9 i
i On April 8,1993, channels 3 (Upper Reactor Vessel A) and 9 (Steam Generator A) were declared inoperable. Channel 3 was declared inoperable because it exhibits background noise t' at is lower than in previous measurements and f
indicates that the previous calibration is no longer valid. Work requests have been written to repair Channel 3 (#93012615) and Channel 9 ($93012646). This system (sensors, cables, control room equipment, etc. ) is schertuled to be i
replaced during the next unit 2 refueling outage. The following channels are operable and provide coverage as noted:
Channel 4 :
Upper Reactor Vessel B i
Channel 5:
Steam Generator A i
Since these channels have been inoperable for more than 30 days, they are reportable to the NRC pursuant to Technical Specification 3.3.3.9.
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