ML20094K341
| ML20094K341 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 03/16/1992 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20094K336 | List: |
| References | |
| 92-143, NUDOCS 9203200228 | |
| Download: ML20094K341 (2) | |
Text
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VIHoiN tA E1.1:CTHIC AN D l' owl:H COMi%NY Iticusioxu,Vunuxar ununi March 16, 1992 U.S.- Nuclear Regulatory Commission Serial No. 92143 Attention: Document Control Desk NAPS /JYR
- Washington, D.C. 20555 Docket No. 50 338 License No NPF-4 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPAtLY NORTH ANNA POWER STATION UNIT 1 CYCLE 9
,QORE OPERATING LIMITS REPORT Pursuant to Technical Specification 6.9.1.7.d, we are submitting the attaci,ed Core Operating Limits Report (COLR) for the remainder of North Anna Unit 1 Cycle 9.
This is the first issuance of a Unit 1 COLR, in accordance '-ith Amendment No.146 which was approved June 7,1991.
. North Anna Unit 1 Cycle 9 originally began operation on March 9,1991.
- However, the unit shut down on December 23,1991 to conduct a mid cycle steam generator _ tube inspection outage.
As a result of the inspection, additional steam generator tube plugging was required. The UFSAR Chapter 15: accidents were evaluated for the increased tube-plugging effects. These evaluations resulted in Technical Specification changes to support a reduced
-minimum RCS. flow rate limit for the Loss of Coolant Accident (LOCA) and a
_ temporary power reduction-for_ the remainder of the cycle.
The reduced minimum RCS flow rate limit and the temporary power reduction were approved by Amendment Nos _154 and 153, respectively.
Several core operating limits were revised as a result of the _UFSAR Chapter 15 accident evaluations and associated Technical Specification _ changes, Therefore, a mid-cycle COLR is necessary to reflect the. change in the N5) functions and the axial flux difference curves for the remainder of Cycle 9.
Should you-have any questions or require additional-information, please contact us at your earliest convenience.
1 l
Very truly yours, 0-w 1
l p r W. L. Stewart Senior Vice President - Nuclear Jo'q u
i 92o320o228 920316 I
PDR ADOCK 05000338 P
Attachment cc:
U.S. Nuclear Regulatory Commission Region 11 101 Marietta Street, N.W.
Suite 2900 Atlanta, Georgia 30323 Mr. M. S. Lesser NRC Senior Resident inspector North Anna Power Station
9-t I
C t
4 9
APPENDIX A 4
NORTH ANNA 1 CYCLE 9 CORE OPERATING LIMITS REPORT Revision 1 (Feb 92) g 5
o l
NIC9 - Core Operating Limits Report - Rev. 1 (Feb 92)
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