ML19324B823

Provides Notification That Fish Impingement & Sound Level Studies Have Been Completed W/Satisfactory Results.Plant Will Continue to Respond to Any Citizen Noise Complaints & Rept Complaints in Annual Environ Operating Rept

ML19324B823
Person / Time
Site:	Byron
Issue date:	10/31/1989
From:	Chrzanowski R COMMONWEALTH EDISON CO.
To:	Murley T Office of Nuclear Reactor Regulation
References
NUDOCS 8911080332
Download: ML19324B823 (3)

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, *[ \ _ J_ Commonwealth Edison 72 West Adams Street, Chic po khnois ,'

Ad5ssD16 pry ~I5 P6sf0ffEEB~oT767-

\ Chicago,lihnois 60600 0767 i October 31, 1989 ,

Dr. Thomas E. Murley, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Hashington, DC 20555

Subject:

Byron Station Units 1 and 2 Technical Specifications Appendix B Environmental Protection Plan NRC_Qqcket Nos. 50-454 and 50-455

Dear Dr. Hurley:

The Byron Station Technical Specification Appendix B, Environmental Protection Plan, requires that a fish impingement study and a sound level study be; performed. .This letter provides notification that the above mentioned studies have been completed with satisfactory results.

6ttachment A contains a May 15, 1989, letter from the Illinois Environmental Protection Agency informing Commonwealth Edison that the fish tmpingement study showed no problem with fish impingement at the intake screens of the Byron Station River Screen House. Furthermore, the IEPA informed Commonwealth Edison that the fish impingement study requirement would be removed from the Byron Station NPDES permit. Appendix B Section 2.1, of the Byron Station Technical Specifications identifies the fish impingement study as an aquatic issue and relles on the IEPA for closure in aquatic

• matters.' With the closure of the fish impingement study by the IEPA, i Commonwealth Edison requests that the NRC consider the requirements of Appendix B, Section 2.1 satisfied.

Appendix B, Section 4.2.2, requires sound level studies be performed under one unit and two unit operations during both summer and winter and at daytime and nighttime hours of these seasons. The sound level studies have been performed. An assessment of the offsite acoustic environment and the mitigative measures taken by Byron Station have been submitted as part of the Byron Station Annual Environmental Operating Report. This report was submitted on March 28, 1989. With the submittal of the acoustic environmental assessment, Commonwealth Edison requests that the NRC consider the requirements of Appendix B. Section 4.2.2 satisfied. Byron Station will continue to respond to any citizen noise complaints, and will continue to report them in the Annual Environmental Operating Report.

Please direct any questions regarding this matter to this office.

) Very truly youre, hbNObbi bb I SW l

P [R.A.Chrzanoski Nuclear Li ensing Administrator L cc: Byron Station Resident Inspector l

L. N. 01shan - NRR Region III Office Office of Nuclear Facility Safety 0Ok 0

0351T:19 .

! V ATTAdoeurr "A lilinois Environmental Protection Agency

• P. O. Box 193.76. Springneld. IL 62794 9276 L

, 217/782-1696

. Comonwealth Edison Company Byron Nuclear Power Station NPDES Permit No. ILOO48313 L MPr Determination under Section 316(b) of the Clean Water Act May 15,1989

..,;f s' i YE oY C hN 2 ght Wi W .iG Comonwealth Edison Company 2 North LaSalle V*?;$>

\./ DJJh@N N<

Post Office Box 767 CA' Chicago, Illinois 60690-0767 Gentlemen:

I On November 5,1986 and September 2,1988, Comonwealth Edison Company subndtted to Generating the IEPA Station documents titled Impingement Monitoring at Bryon 1985-1986 Station 1987-1988 respectively. and Impingement Monitoring at Byron Generating L the test established by Section 316(b) of the CWA and 35 Ill. Admin. Co 306.201.

Byron Nuclear Power Station consists of two pressurized water reactors with a rated capacity of 2240 MW. A closed-cycle cooling water system using two natural draft hyperbolic cooling towers is used to dissipate heat from the condensation of steam formed in the secondary cycle by the steam generator.

The source for make-up wcter to the system is the Rock River. The two intake 1 pumps operated at a maximum of 45,000 gpm (100.3 cfs) during the study. The 7Q10cfs.

1100 of. the Rock River at the location of the station intake is estimated at study. Intake velocity was a maximum 0.91 ft./sec. measured during the ,

The number and species of fish impinged on the revolving intake screens at j

Byron Station have been recorded for two periods July 9,1985 to July 18, 1986 ,

and November 3,1987 to April- 29, 1988.' Twenty four hour samples were l'

collected twice per week during these periods. Extrapolation of the catch is required in order to estimate weekly impingement. The available data established which fish species are likely to be impinged and their seasonal occurance. Data for the period of study shows that the estimated number of  !

fish impinged is low (11 fish / day 1985-1986; 37.8 fish / day 1987-1988) and impingement is dominated by juvenile fish (Appendix B List of Raw Fish Data).

Based on the low numbers of fish impinged during the study and the fact that impinged fish are dominantly juvenile channel catfish, juvenile bluegill and '

cyprinid (minnow) species, .the operatien ef4yton Station coolina water intake o

will have n_o._measurabic impact on the Fishery of the Rock River.

The effects of construction of the Byron Station intake were limited to the imediate shoreline where the structure is located. No detrimental impacts on fish were anticipated due to construction.

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'; . Illinois Environmental Protection Agency

• P. O. Box 19276, Springneld. IL 62794-9276

Page 2 Intake design alternatives in:1ude other structurally or mechanically different intake systems which could be constructed at the. location. In y review of the' general layout of the existing system being an on shoreline s_ structure (flush mounted screen s stem) whi h is designed to minimize

< funneling of fish toward the inta e acording to the available literature, the existing intake structure is designed and is providing minimal adverse

. environmental impact.

The intake capacity is subject.to station water requirement to replace evaporative losses plus the necessary blowdown to maintain cooling water quality in the closed-cycle system. ~ The closed cycle cooling system is Best

, Available Technology (BAT) reducing the total intake volume to approximately 5 percent of what a plant of equivalent size would require under open cycle operation; The IEPA herein detemines that the Demonstration Documehts satisfactorily show that the location, design, construction and capacity of the. Byron Station intake structure reflects the best available technology for minimizing adverse environmental impact; The NPDES Pemit for this Facility; IL0048313; will be-modified to reflect this determination when the permit is reissued; Should you have any questions or coments regarding the Agency's review of this matter; please cdvise; Ver +M y yo ,

f~ .i omasG'Mc3wiggin;P;Ed Manager; Pemit Section Division of Water Pollution Control l L t TGM:GC:dls/1585k;84-85 cc: IEPA-RU Rockford Regional Office j u

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