ML20073L559

Forwards 1990 Corbicula Control Program Environ Fate & Effects Studies - Baseline,Spring & Fall Dosing Studies, Beaver Valley Power Station. Util Intends to Utilize Chemical Additives in River (Svc) Water Sys at Facilities

ML20073L559
Person / Time
Site:	Beaver Valley
Issue date:	05/06/1991
From:	Sieber J DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20073L564	List: ML20073L559 ML20073L573
References
NUDOCS 9105140019
Download: ML20073L559 (2)

Text

_ _ _ _ _ _ - - _ _ _ _

,6 e.

yp

% %- staten Sh.Linog; ort. f A $077{O04 May 6, 1991 UlRu c~

n mun U.

S.

Nuclear Regulatory Commission Attn:

Document Control Desk Washington, DC 20555

Subject:

- Beaver Valley Power Station, Unit No. 1 and No. 2 BV-1 Docket No. 50-334, License No. DPR-66 BV-2_ Docket No. 50-432, License No. NPF-73 Control of Asiatic Clams The purpose. of this letter is to inform the NRC of our intent to utilize chemical additives in the river (service) water systems at both Unit No.

1 and No.

2 to control Asiatic Clams (corbicula fluminea).

The precent schedule is to begin treatment in Unit No. 2 in1the month of August, 1991.

The Unit No.

2 operating license defines in Appendix B the Environmental Protection Plan under which Unit No. 2 must operate.

Therein it states that activities which may significantly affect the environment shall be. evaluated to determine jf an unreviewed environmental question exists.

We have concluded, based on 1990 environmental studies conducted on Unit No.

1, that this process will not have a

significant adverse environmental impact and, therefore, does not involve an unreviewed environmental question.

This conclusion. is. supported in the attached report; "1990 Corbicula Control. Program Environmenta3 Fate and Effects Studies - Baseline, Spring and Fall Dosing Studies."

This report is being provided to inform the NRC of the results of the first-phase' pilet program studics on the chemical additive

. clam-trol (CT-1) and its detoxifying agent (DT-1) used in the river water system of Beaver Valley Unit No.

1 during 1990.

Written approval to use this product in Unit No. 1 was received from the Pennsylvania Department of Environmental Resources (PA DER) on June 3,

1990.

Written approval of the second phase of the pilot program was received from the PA DER on April 10, 1991.

This includes use of the chemical additives in both units.

There were no

-changes required to the NPDES Permit since these are pilot studies.

If we. intend to utilize this process as part of routine operations, we will file for a change to the NPDES Permit.

Three ' specific research studies were carried out in 1990:

(1) a baseline study of conditions prior to addition of chemicals into the

~ Unit-1 river water system, (2) a spring dosing study which continued for 40 daysL after CT-1 application, and (3) a fall dosing study of similar duration.

The

' attached is a

comprehensive report encompassing the data and results of the baseline, spring, and fall

. studies.

Corroborating results from the three tiers of testing showed no. measurable impact on the ecological integrity of the Ohio

-9105140019 910506 PDR= ADOCK 05000504

($ ()l2!

R PDR f

6 Control of Aslatic Clams Page 2 River receiving system from CT-1 application in the plant or DT-1 detoxification of the effluent.

The executive summary of the attached report provides a good synopsis of the 1990 program.

The 1991 research studies will be conducted in the fall and will be similar to the 1990 studies which employed a three-tiered approach utilizing formal laboratory toxicity testing, an onsite experimental stream

facility, and biosurveys carried out in the river.

Chemical applications in 1991 of CT-1:DT-1 will be limited to six per year per unit.

Treatment will only be performed on an as-needed basis and would not occur simultaneously.

If you have any questions regarding this subject, please contact J.

Wayne McIntire at (412) 393-5873.

Sincerely,

(-

D.

Sieber lice President Nuclear Group Attachment cc:

Mr.

J.

Beall, Sr. Resident Inspector Mr.

T.

T.

Martin NRC Region I Administrator Mr.

A.

W.

DeAgazio, Project Manager Mr.

R.

Saunders (VEPCO)

L