ML061520493
| ML061520493 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/18/2006 |
| From: | Grimes J Exelon Nuclear |
| To: | Jason Draper Office of Nuclear Reactor Regulation, State of PA, Dept of Environmental Protection |
| References | |
| Download: ML061520493 (5) | |
Text
Exelenm Exelon Nuclear Telephone 717.456.7014 Nuclear Peach Bottom Atomic Power Station www.exeloncorp.com 1848 Lay Road Delta. PA 17314-9032 May 18, 2006 Jaala Draper Pennsylvania Department of Environmental Protection 909 Elmerton Avenue Harrisburg, PA 17110-8200
Subject:
Peach Bottom Atomic Power Station, PWS 7670905 Temporary Permit to Operate a Modified Treatment System
Dear Ms. Draper,
This letter is to request a Temporary Drinking Water Permit for Peach Bottom Atomic Power Station, PWS 7670905. Peach Bottom needs to remove the Domestic Water Polishing filters from service to perform maintenance to comply with SDWA Turbidity regulations. Maintenance work will include redirecting flow to the individual polishing effluent turbidimeters so that these meters have constant flow, thus eliminating flow perturbations. Also, adjustments will be made so that process flow will be reduced to the individual polishing filters to be more in alignment with the design of the polishing filters. To temporarily replace the Domestic Water Polishing Filters we are proposing to use a reverse osmosis unit to act as a final filter. The requested duration of this temporary permit is for two months from the date of approval.
The RO influent has been treated the same as the Polishing Filter influent. The RO effluent water quality is typically close to the values in the attachment. The RO effluent will be passed through a calcium carbonate bed to raise the pH to near neutral. The effluent of the calcium carbonate bed will be chlorinated as it enters the Domestic Water Storage Tank.
The Calcium Carbonate and Sodium Hypochlorite utilized in this process are both NSF approved. The piping utilized to transport the water will be NSF approved flexible fire hose.
Attached you will find a schematic of the proposed temporary treatment system, the typical water quality of the RO effluent, and the certification sheet for Calcium Carbonate. This configuration is the same as the temporary permit granted to Peach Bottom on November 9, 2004, permit number 6704516 MA.
If you need additional information, the points of contact are Francis Jordan (7171 456-3608, Art Arcilla {717} 456-4185 or Daniel Jordan {717) 456-4551.
Sincerely, Jos ph P. Grimes, Plant Manager Peach Bottom Atomic Power Station ccn 06-14038 C_ D 13erf Cory 4 vael/eal/
0-FLOW DIAGRAM Clarified Water Storage Tank Multimedia Trailer Reverse Osmosis An-ay
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pH Probe Calcium Carbonate I Turbidimcter I To Domestic Water Storage Tank
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Conductivity - 2.72 us/cm Total Fe - <0.001 mgIl Hardness - 0.147 mg/l Reactive SiO2 - 0.0426 mg/l TOC - 0.0817 mg/l PH - 5.66
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