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Category:Letter
MONTHYEARIR 05000352/20243012024-02-0202 February 2024 Initial Operator Licensing Examination Report 05000352/2024301 and 05000353/2024301 IR 05000352/20230042024-01-31031 January 2024 Integrated Inspection Report 05000352/2023004 and 05000353/2023004 IR 05000352/20240112024-01-31031 January 2024 Information Request to Support Post-Approval Site Inspection for License Renewal; Inspection Report 05000352/2024011 ML24026A2962024-01-26026 January 2024 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System (PPS)- Syrs, . 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IR 05000352/20230022023-08-14014 August 2023 Integrated Inspection Report 05000352/2023002 and 05000353/2023002 ML23220A0182023-08-0808 August 2023 Information Request for the Cybersecurity Baseline Inspection, Notification to Perform Inspection 05000352/2023401 and 05000353/2023401 RS-23-087, Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor2023-08-0404 August 2023 Revision to Approved Alternatives Associated with the Use of the BWRVIP Guidelines in Lieu of Specific ASME Code Requirements on Reactor ML23212B2362023-07-31031 July 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System - WEC Documents ML23212B1052023-07-31031 July 2023 Supplement to License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFR50.62 ATWS Rule to Support the Digital Modernization Project Installation - Revise ML23202A2192023-07-21021 July 2023 Response to Request for Additional Information for Supplemental License Amendment Request to Revise Technical Specifications and Exemption Request from Requirements of 10CFR50.62 ATWS Rule to Support the . ML23193B0122023-07-20020 July 2023 Audit Plan in Support of Review of License Amendment Request and Exemption Request for Digital Instrumentation and Controls Installation Support (Epids L-2023-LLA-0025 and L-2023-LLE-0005) ML23187A0962023-07-19019 July 2023 Generation Station, Unit Nos. 1 and 2 - Revised Estimated Review Completion Date Concerning License Amendment Request to Replace Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection System ML23208A1522023-07-0606 July 2023 PEMA Letter Dated 7-6-23 Re Limerick Exercise 9-26-23 ML23177A2242023-06-26026 June 2023 Supplement to License Amendment Request to Revise the Licensing and Design Basis to Incorporate the Replacement of Existing Safety-Related Analog Control Systems with a Single Digital Plant Protection . ML23145A1972023-06-23023 June 2023 Correction to the Renewed Facility Operating License Pages in Amendment Nos. 255, 256, 257, 258, 259, and 260 2024-02-02
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- Exelkn E ,on Nuclear www.exeloncorp.comN Limerick Generating Station Nucea V.0. Box 2300 Pottstown, PA 19464 NPDES PA 00051926 August 24, 2007 Mr. Sohan Garg.
Chief, Permits Section Water Management Program Department of Environmental Protection 2 East Main Street Norristown, PA 19401
Subject:
Cooling Tower Basin Chlorination
Reference:
LGS Industrial Waste NPDES Permit PA00051926
Dear Mr. Garg:
Limerick Generating Station has been implementing a conservative cooling tower basin chlorination schedule, in order to ensure that the two hour per day, per unit, NPDES Permit application limit for Total Residual Oxidants is not exceeded.
Since the Spring of 2006, increased algae growth on the cooling tower raceways has been a .recurring problem during warm weather months, resulting in blockage of fill section inlets, and spillage over the sides of the raceways. The spill volume has been as great as 19,000 gallons per day, with all flow discharging to Outfall 021. These overflow scenarios result in increased: Operations Department personnel manpower requirements to operate deicing systems when not normally needed; Maintenance personnel activities to mechanically clean the raceways and cooling tower basin weir screens; and sampling'and analysis activities as a result of discharges to Outfall 021.
This correspondence is to request an increase in the maximum allowable discharge duration, per unit, from two hours to three hours per day. This would not impact.the current daily maximum effluent limitation concentration for Total Residual Oxidants of 0.2 mg/L at Outfall 001.
It is anticipated that this change would preclude problematic algae buildup on the cooling towers, while allowing LGS to meet its continued commitment to full NPDES Permit compliance.
This letter contains no commitments.
Thank you for your cooperation in this matter. Should you have any questions regarding this information, please contact Bob Alejnikov at 610-718-2513.
Sincerely; Edward W. Callan Plant Manager Limerick Generating Station Exelon Generation Company, LLC cc: S. Collins, Region 1 Administrator, USNRC S. Hansell, Resident Inspector, USNRC Document Control Desk, USNRC, Wash. DC
bcc: E. Callan - GML 5-1 C. Mudrick - GML 5-1 T. Basso - SSB 2-1 S. Mitten - SSB 2-1 R. Alejnikov - SSB 2-1 T. Siglan - KSA 3N R, Kreider - SSB 2-4