ML20106D455
| ML20106D455 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 10/18/1984 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Eisenhut D Office of Nuclear Reactor Regulation |
| References | |
| 579, NUDOCS 8410250161 | |
| Download: ML20106D455 (2) | |
Text
s VIRGINIA ELECTILIC AND POwsu CO)1PANY Ricilnoxu,VINGINIA 2 0061 W. L. sranur w [c =5. o'[ N on.
October 18, 1984 Mr. Harold R. Denton, Director Serial No:
579 Office of Nuclear Reactor Rcgulation N0/DWL/1ms Attn:
Mr. Darrell C. Eiserhut, Director Docket Nos. 50-338 Division of Licensing 50-339 U. S. Nuclear Regulatory Commission License Nos. NPF-4 Washington, D. C. 20555 NPF-7 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY HYDROELECTRIC POWER PROJECT AT NORTH ANNA POWER STATION DAM SITE This letter is to advise you of Vepco's plans to build a small hydroelectric power unit at the North Anna Power Station dam site.
This hydroelectric unit would utilize the normal water flow which passes through the North Anna Dam.
The hydroelectric unit is designed to operate using the required 40 cubic feet per second (cfs) minimum flow through the dam and flows up to a maximum of 177 cfs.
The hydroelectric unit generating capacity at maximum flow is 855 KW.
Because of the hydroelectric project's location at the North Anna Power Station dam site, the North Anna Technical Specifications were reviewed in order to determine the potential for any impact on the North Anna Power Station.
Two items were identified from this review.
First, the incremontal environmental impact of the hydroelectric project was assessed.
Since the hydroelectric project utilizes the minimum flow from the dam and additional flow only when it is availabic and the flow used is returned directly to the downstream flow of the dam discharge, no impact to the downstream environment would occur.
Secondly, the impact on the seismic stability of the North Anna dam was evaluated.
The hydroelectric unit power platform will be a separate structure which is not connected to the North Anna dam except by a penstock pipe which provides the water supply to the power platform. The penstock will intersect with and take the place of the existing 6 foot diameter sluice pipe which currently passes the flow controlled by the dam skimmer gates.
The penstock will run along and be anchored to the spillway retaining wall to the downstream power platform area.
The effect of the penstock penetration at the sluice pipe and the placement of the penstock on the retaining wall have been analyzed to determine that any change in the North Anna dam seismic stability and its safety factors are negligible.
8410250161 041018 0'\\
PDRADOCK05000E M
n.
ViaorwtA Er.scTalC AND Powza COMPANY To Harold R. Denton In March
- 1984, Vepco filed an
" Application for Exemption of Small Hydroelectric Power Project from Licensing" with the Federal Energy Regulatory Commission (FERC Project No. 6335).
With this action and our assessment that this project will not impose any negative impact on the environment or on the continued safe operation of the North Anna Power Station, we are proceeding with our plans to construct this facility.
Our plans are to begin construction in 1985.
If you have any questions or concerns regarding this proj ect, please contact us prior to November 30, 1984 so that we may resolve any concerns prior to the start of construction.
Very truly yours, MCM W. L. Stewart cc:
Mr. James P. O'Reilly Regional Administrator U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. James R. Miller, Chief Operating Reactors Branch No. 3 Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Mr. Leon B. Engle, Project Manager Operating Reactor Branch No. 3 Division of Licensing Mr. M. W. Branch NRC Resident Inspector North Anna Power Station L