ML20077Q938
| ML20077Q938 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 08/12/1991 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9108220068 | |
| Download: ML20077Q938 (2) | |
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{Nh DUKEPOWER August 12, 1991 t
U. S. Nuclear Regulatory Commission A1TN: Document Control Desk Washington, DC 20555
Subject:
Catawba Nuclear Station, Unit 2 Docket No. 50-414 Nineteenth Quarterly Update to Startup Report In accordance with Section 6.9.1.3 of the Catawba Nuclear Station Technical Specifications, find attached the nineteenth quartcly update to the Unit 2 Startup Report.
As indicated in my May 7,1991 letter, one test is not complete. Additional quarterly updates to the Startup Report will be submitted as required by the Technied Specifications.
Very truly yours, N, S.
ub M. S. Tuckman CRL/19THUPSR Attachment xc: S. D. Ebneter Regional Administrator, Region II R. E. Martin, ONRR W. T. Orders Senior Resident inspector
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l STARTUP REPORT QUARTERLY UPDATE CATAWBA UNIT 2 CYCLE 1 August 12, 1991 TESTING COMPLETED DURING OUARTER None.
STATUS OF TESTING NOT COMPLFTE STEADY STATE PIPING SYSTEMS OPERATIONAL VIBRATION MEASUREMENT -
TP/2/A/1200/21 This test was described in Sections 10.5 and 11.5 of the Startup Report. This test is complete except for retesting the piping associated with the Diesel Generator Fuel Oil and Lube Oil Systems. Additional restraints were installed during the EOC-1 refueling outage.
However, further modification was found to be necessary. This modification involved the replacement of rigid piping with flexible piping. Vibration testing following completion of the modification indicated that overall vibration levels had been reduced. However, vibration levels in isolated portions of the piping still exceeded the allowable criteria.
These levels were evaluated and found to not constitute an imminent danger of failure. To resolve these iselated problems, modifications were planned which will result in a piping configuration similar to Unit 1.
These modifications include the replacement of non-standard fittings with standard fittings, deletion of unnecessary Danges, and valve relocation. Due to the extent of these modifications, work requests have been issued to perform these modifications during the Unit 2 EOC 4 refueling outage scheduled for the fourth quarter of 1991.
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