ML032940674
| ML032940674 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 10/15/2003 |
| From: | Bryan Hanson Exelon Nuclear |
| To: | Garg S Office of Nuclear Reactor Regulation, State of PA, Dept of Environmental Protection |
| References | |
| PA00051926 | |
| Download: ML032940674 (2) | |
Text
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Exe Ipf n SM Exelon Nuclear www.exeloncorp.com Nuclear Limerick Generating Station P.O. Box 2300 Pottstown, PA 19464 NPDES Permit 00051926 October 15, 2003 Mr. Sohan Garg Water Management Program Pennsylvania Department of Environmental Protection Lee Park, Suite 6010 555 North Lane Conshohocken, PA 19428 South Eastern Regional Office
Subject:
Limerick Generating Station Industrial Waste NPDES Permit #PA00051926
Reference:
Letter B. Hanson (LGS) to J. Fields (PADEP) dated 7/25/03
Dear Mr. Garg:
This letter is in response to your request for information regarding the amount of discharge from the Limerick Generating Station's Emergency Spray Pond and the potential effects of Aquashade on the Schuylkill River. The impact of Aquashade on the Schuylkill River will be negligible. The concentration of Aquashade in the Emergency Spray Pond will be maintained at 1 ppm. The overflow of the Spray Pond enters the Cooling Tower Blowdown line, which flows to Outfall 001. Normal blowdown flow is between 6,000 and 8,000 gpm. The data available for flow from the Spray Pond show approximately 29.26 million gallons over two years (including precipitation and two periods of bleed and feed operation). The concentration of the Aquashade that could reach the Schuylkill Riveris 0.009 ppm. This value was calculated using several assumptions; the blowdown flow is low at 6,000 gpm, the entire two-year overflow volume is released in one year at 56 gpm.
In the paper, 'Evaluation of Transparency and Light Attenuation by Aquashade" by John D. Mudsen, et. al. (See Attached), one ppm of Aquashade reduced transparency by approximately 10 %, and 5 ppm reduced transparency by approximately 30 %. The decrease in transparency due to the 0.009 ppm solution would be 0.09%, assuming linear response from zero to I ppm. The absorbance at wavelength 625 nm of a one ppm solution is 0.025. The absorbance of a 0.009 ppm solution would be approximately 0.000225 before any dilution by the Schuylkill River.
At the low absorbance value and the small decrease in transparency the Aquashade will have little to no effect on
-- the vegetation of the Schuylkill River down stream of the Limerick Generating Station's discharge line. If you have further quests on this matter,-please feel free to contact either Mr. Robert Alejnikov.at 610-718-2513 or Mr. Todd Tierney at 610-718-2701. Thank you for your cooperation in this matter.
Sincerely, Bryan Hanson Plant Manager-LGS cc: A. Burritt USNRC Sr. Resident Inspector-LGS:
fH. Miller USNRC Region I Administrator Dbcument Control Desk, USNRC, Wash. DC
bcc: B. Hanson GML 5-1 R. DeGregorio GML 5-1 R. Newmaster SSB 2-1 T. Tierney Chem Bldg R. Alejnikov SSB 2-1 N. Chand SSB 3-4 G. Sosson SSB 3-4 T. Siglin - KSA 3N K. Kemper - SSB 2-4