ML20086D824
| ML20086D824 | |
| Person / Time | |
|---|---|
| Site: | Catawba  |
| Issue date: | 11/13/1991 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9111260274 | |
| Download: ML20086D824 (3) | |
Text
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4 Yl? (1 w c c.'/d N,f cn DUKEPOWER November 13, 1991 U.
S. Nuclear Regutatory Commission ATTN:
Document Control Desk Washington, DC 20555
Subject:
Catawba Nuclear Station, Unit 2 Docket No. 50-414 Twentieth Quarterly Update to Startup Report In accordance - with Section 6.9.1.3 of the Catawba Nuclear Station Technical Specifications, find attached the twentieth quarterly update to the Unit 2 Startup Report.
As indicated in my August 12, 1991
- letter, one test is not couplete.
-Additional quarterly updates to the Startup Report will be submitted as required by the Technical Specifications.
Very truly yours, Y h.
M.
S.
Tuckman Vice President CRL/20THUPSR Attachment xc:
S. D.
Ebneter Regional Administrator, Region II R.-E.
Martin, ONRR W.
T. Orders Senior Besident Inspector t/j 911126027/ L11i!3 FDR ADOC.r 05000g 4
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.4 U. S.-LNuclear Regulatory Commission November 13, 1991
-- Page 2 bxc:
R.
G.
Blessing G.
P. llorne R.
A. Jones R.
C.
Futrell J. M. McGarry C.
R.
Lewis R.
L. Gill
'NCMPA-1 NCEMC PMPA SREC Group File:
801.01 I
i
t' 4-STARTUP REPORT QUARTERLY _ UPDATE CATAWBA UNIT 2 CYCLE.1 November 13, 1991 TESTING COMPLETED DURING QUARTER None.
STATUS OF TESTING NOT COMPLETE STEADY STATE PIPING SYSTEMS OPERATIONAL VIBRATION MEASUREMENT -
TP/2/A/1200/21 This test was described in Sections 10.5 and 11.5 in the Startup heport.
It is complete except for retesting of piping associated with the Diesel Generator Fuel Oil and Lube Oil systems.
Additional restraints were installed during the EUC-1 refueling outage.
However, further modifications were found to be necessary.
Those modifications 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 exceed allowable criteria.
These levels were' evaluated and found to not constitute an imminent danger of failure.
To resolve these isolated problems, modifications are planned which will result in a piping configuration similar to Unit 1.
The modifications-include replacement of non-standard fittings 1
with standard-fittings, deletion of unnecessary flanges, and valve -relocation.
These modifications were previously scheduled to be completed in the current Unit 2 EOC4 refueling
-outage.
It has since been determined that an NSM_(Nuclear Station Modification) will be required due to the extent of the modifications.
The design work for this NSM (CN-20659) is nearing completion.
The design work for the NSM resulted in a change to the modificatio't that will allow the work to be done without an outage.
Implementation should be completed during the second quarter of 1992.
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