ML20138R052
| ML20138R052 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/20/1985 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Rubenstein L Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20138R054 | List: |
| References | |
| 85-854, NUDOCS 8512300287 | |
| Download: ML20138R052 (2) | |
Text
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4 VIHOINIA ELucrHIC AND POWEN COMrANY Hicitxoxn,VIHOINIA 20061 W.L. STEWART d' *," [","," ' "" ",,
December 20, 1985 Mr. Harold R. Denton, Director Serial No.85-854 Office of Nuclear Reactor Regulation N0/EJL:acm Attn: Mr. Lester S. Rubenstein, Director Docket Nos. 50-338 PWR Project Directorate #2 50-339 l
Division of PWR Licensing-A License Nos. NPF-4 U.S. Nuclear Regulatory Commission NPF-7 Washington, D.C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS NO. 1 AND 2 CONDENSER FLOW MODIFICATION PROGRAM As discussed with members of your staff, this letter is being provided in order to inform you and your staff of a design change that is being made at the North Anna Power Station. Specifically, during the cooler months of the year we will be reducing the circulating water flow through the station by removing circulating water pumps from service and by throttling the discharge valves of the circulating water pumps that remain in service. This modification is being made in order to increase the back pressure in the condenser which will help redm:e condenser tube vibration and improve the operating efficiency of the station. As a result of this modification, the temperature change across the condensers will increase above existing levels with a subsequent increase of water temperatures to the Waste Heat Treatment Facility environment. There will be no increase in thermal output (BTU) from the station and the temperature of the water being discharged from the Waste Heat Treatment Facility into Lake Anna is expected to be equal to or less than those that currently exist.
In accordance with Appendix B to the Facility Operating Licenses for North Anna Units 1 and 2 we have prepared an environmental evaluation of this activity.
This evaluation assesses the effect of the increased water temperatures in the Waste Heat Treatment Facility on the environment.
Based on this evaluation we have concluded that this activity does not constitute an unreviewed environmental question, and does not involve a t e change in the Environmental Protection Plan.
This activity has been oOE reviewed with the North Anna 316(a) Technical Advisory Committee, and
@o copies of the environmental evaluation have been provided to the Committee and to the Virginia Water Control Board. In addition, the Station Nuclear
$o Safety and Operating Committee (SNSOC) has reviewed and approved this evaluation. Five copies of the environmental evaluation are enclosed.
Finally, we have determined that this design change will require us to 04 modify portions of the Offsite Dose Calculation Manual (ODCM) to address the change in the circulating water flow.
These modifications will be nb AD - J. KNIGHT (ltr only)
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visorwu Es.scienc Axo Powra COMPANY TO Mr. Ilarold R. Denton made in accordance with the requirements of Section 6 of the Technical Specifications for the North Anna Power Station Units 1 and 2,
respectively.
We plan to implement this design change later this month following the completion of the Unit i refueling outage.
If you have any questions on this material, please contact us.
Very truly yours,
)
A W. L. Stewart
Enclosure:
1.
North Anna Power Station Intake Flow Modification Program Environmental Evaluation cc:
Dr. J. Nelson Grace Regional Administrator NRC Region II Mr. Morris W. Branch NRC Resident Inspector North anna Power Station Mr. Charles Price Department of Health 109 Governor Street Richmond, Virginia 23219 Mr. Leon B. Engle NRC North Anna Project Manager PWR Project Directorate #2 Division of PWR Licensing-A