ML20137D551

Requests Addl Info Re Environ Impact of Proposed Corrective Program for Bearing Cooling Water & Svc Water Sys at Site, Detailed in Util

ML20137D551
Person / Time
Site:	North Anna, 05000000
Issue date:	06/24/1977
From:	Regan W Office of Nuclear Reactor Regulation
To:	Brown S VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
Shared Package
ML20136A555	List: IA-85-363, Submits Topics for Discussion at Commission 830708 Meeting W/Acrs.Topics Include Seismic Design Margins ML20136A550 ML20136E176 ML20136E418 ML20136E423 ML20136E621 ML20136E929 ML20136F618 ML20137D336 ML20137D440 ML20137D455 ML20137D472 ML20137D477 ML20137D494 ML20137D511 ML20137D540 ML20137D551 ML20137D557 ML20137D562 ML20137D570 ML20137D576 ML20137D583 ML20137D588 ML20137D598 ML20137D601 ML20137D609 ML20137D616 ML20137D621 ML20137D627 ML20137D635 ML20137D641 ML20137D646 ML20137D652 ML20137D659 ML20137D665 ML20137D670 ML20137D849 ML20137D867 ML20137D881 ML20137D911 ML20137D924 ML20137D951 ML20137D978 ML20137E016 ML20137E026 ML20137E044 ML20137E056 ML20137E075 ML20137E098 ML20137E113 ... further results
References
FOIA-85-363 NUDOCS 8508220513
Download: ML20137D551 (2)

Text

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f a NUCLEAR REGULATORY COMMISSION

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Virginia Electric and Power Company .

ATTN: Mr. Sam C., Brown, Jr. .

Vice-President, Power Station Engineering and Construction , .

P.O. Box 26666 Richmond, Virginia 23261 *

Dear Mr. Brown:

By letter dated April 29, 1977 you informed us of your plans to institute a corrective progrem to reduce problems associated with fouling and corro-sion of the Bearing Cooling Water and Service Water Systems at the florth

- Anna Power Station, Units llos. 1 and 2. Your letter included a brief description of the anticipated environmental impact of the propased cha.nge. ,

The Addendum to the Final Environnwntal Statement for !! orth Anna Power Station, Units t!os. I and 2 includes a condition which states, ,

"Before engaging in additional construction or operational activities -

which may result in an environmental impact that was not evaluated by

- the Commission, the licensee will prepare and record an environmental evaluation of such activity. When the evaluation indicates that such i

activity may result in a significant adverse environmental impact '

that was not evaluated, or that is significantly greater than that .

• evaluated in the FES or any addendum thereto, the licensee shall pro-

- vide a written evaluation of such activities and obtain prior approval from the Director, Office of fluclear Reactor Regulation." -

l The information included in your letter indicates that the proposed ' '-  !.

corrective program would result in an environmental impact. However, the ,

. ' infonnation protided is not sufficient to permit us to determine the sig-nificance of the environmental impact. Consequently, we request that you provide.the information requested in Enclosure 1 to this letter in order that we'may verify that a significant environmental impact will not result from this activity.

Sincerely, l

6500220513 050722 FOIA

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PDR DELLOS-363 PDR William R. Regan, Chief' l.

i Environmental Projects Branch 2 s

Division of Site Safety and Environmental Analysis l'

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' REQUIRED ADDITIONAL INFORMATION FOR

' ' NORTH Attila PO*.-lER STAT 10tl, UtilTS ftOS.1 & 2

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. t BEARiftG & SERVICE '<!ATER SYSTEMS

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1. Explain more fully how the cleaning of fouling and corrosion products ,

from both systems will be accomplished. Provide the comercial and chemical names of all compounds being used. Indicate the amounts to

• be used and method of disposal of cleaning wastes. [

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2. Estimate the concentration of total phosphorus (including phosphate, l-ortho-phosphate, and polyphosphates) and free chlorine at the point of discharge to surface water. Also provide the average flow of the discharge. Indicate the total number of pounds expected to be dis- -

charged annual.ly. Estimate the effect on concentration due to accumu-

. . lation in the Lake. Indicate expected effect on, eutrophication. ,

3. It is stated in your letter that during worst conditions the residue i from the blowdown will contain 10 mg/l (ppm) of PO4 and .5 ppm free ,

residual chlorine at a pH of 6 to 8.5. How often will these worst i conditions be expected? Also provide the average flow rate of these discharges. ,

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Have you applied for en amendment in your NPDES permit to cover these l

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new discharges?

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