ML20059G691
| ML20059G691 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Catawba, McGuire  |
| Issue date: | 01/10/1994 |
| From: | Tuckman M DUKE POWER CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20059G696 | List: |
| References | |
| NUDOCS 9401250143 | |
| Download: ML20059G691 (3) | |
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P-D4ehuer Company M S Dana F0 Box 1006
' Senior Vice President Charlane, NC2820M006 NuclearGenerabon (704)382-22000Wice (704)3824360Far
' DUKEPOWER January 10,1994 U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Attention: Document Control Desk
Subject:
McGuire Nuclear Station Docket Numbers 50-369 and -370 Catawba Nuclear Station Docket Numbers 50-413 and -414 Technical Specification Revision to Change Method of Measuring Reactor Coolant System Flow Rate Attached is a proposed revision to the Technical Specifications of the McGuire and Catawba Nuclear Stations, to change the method of measuring the reactor coolant system flow rate (TS 4.2.5.3) during the 18-month surveillance. The current method, calorimetric heat balance, has a large uncertainty due to hot l
leg temperature streaming. It is proposed to return to the method with which McGuire Unit I was originally licensed, cold leg elbow taps. This method of determining compliance with TS requirements for flow was abandoned in favor of the supposedly more accurate heat balance in 1982, before the temperature streaming phenomenon was adequately understood.
This change is applicable to Units 1 and 2 of both McGuire and Catawba Nuclear Stations.
The marked-up Technical Specification pages are contained in Attachment I, a Justification and Safety Analysis in Attachment II, and a "No Significant Hazards" analysis appears in Attachment III.
If any additional information is required, please call Scott Gewehr at (704) 382-7581.
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M. S. Tuckman i P90.ic 00(
9401250143 940110 i
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'k PDR ADOCK 05000369 iv.w m saa
c U. S. Nuclear Regulatory Commission January 10,1994 Page 2.
cc: Mr. V. Nerses, Project Manager Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 14H25, OWFN Washington, D. C. 20555 Mr. R. E. Martin, Project Manager Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Mail Stop 14H25, OWFN Washington, D. C. _20555 Mr. S. D. Ebneter, Regional Administrator U.S. Nuclear Regulatory Commission - Region II 101 Marietta Street, NW - Suite 2900 Atlanta, Georgia 30323 G. F. Maxwell Senior Resident Inspector McGuire Nuclear Station R. J. Freudenberger Senior Resident Inspector Catawba Nuclear Station Dayne Brown, Director Division of Radiation Protection P. O. Box 27687 Raleigh, North Carolina 27611-7687 Heyward G. Shealy, Chief Bureau of Radiological Health South Carolina Department of Health and Envi onmental Control 2600 Bull Sreet Columbia, South Carolina
U. S. Nuclear Regulatory Commission Januar'y 10,1994 Page 3 M. S. Tuckman, being duly sworn, states that he is Senior Vice President of Duke Power Company; that '
he is authorized on the part of said Company to sign and file with the Nuclear Regulatory Commission '
t this revision to the McGuire Nuclear Station Facility Operating Licenses NPF-9 and NPF-17, and to the -
Facility Operating Licenses NPF-35 and NPF-52 of the Catawba Nuclear Station; and that all the i
statements and matter set forth herein are true and correct to the best of his knowledge.
wm M. S. Tuckman, Senior Vice President
'l Subscribed and sworn to before me this llS day of 8A1J
,1993 Y 0My hY1W Notary Pjblic i
1 My Commission Expires.
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