ML25183A133

Proposed Extension - Response to Requests for Additional Information (Rais)

ML25183A133
Person / Time
Site:	Limerick
Issue date:	07/02/2025
From:	Para W Constellation Energy Generation
To:	Office of Nuclear Reactor Regulation, Document Control Desk
References
Download: ML25183A133 (1)

Text

200 Energy Way Kennett Square, PA 19348 www.ConstellationEnergy.com 10 CFR 50.90 JuO\\ , 2025 U.S. Nuclear Regulatory Commission Washington, DC 20555-0001 ATTN: Document Control Desk Limerick Generating Station, Units 1 and 2 Renewed Facility Operating License Nos. NPF-39 and NPF-85 NRC Docket Nos. 50-352 and 50-353

Subject:

Proposed Extension - Response to Requests for Additional Information (RAIs)

References:

1. Constellation Energy Generation, LLC (CEG) letter to the U.S. Nuclear Regulatory Commission (NRC), "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)," dated September 26, 2022 (NRC Agencywide Documents Access and Management System (ADAMS) Accession No. ML22269A569).

2. CEG letter to the NRC, "Resubmittal of 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) - To Address Proprietary Issues with INL HFE Reports," dated September 12, 2023 (ADAMS Accession No. ML23255A095).

3. Email from Michael Marshall, (NRC) to Ashley Rickey (CEG), Limerick Generating Station, Units 1 and 2 - Request for Additional Information and Draft Requests for Confirmatory Information Regarding Limerick Digital Instrumentation and Controls License amendment Request (EPID L-2022-LLA-0140), dated January 6, 2025 (ADAMS Accession No. ML25007A150).

Proposed Extension - Response to RAIs Limerick Digital Modernization Project Docket Nos. 50-352 and 50-353 JuO\\ , 2025 Page 2

4. CEG letter to the NRC, Proposed Extension of Due Date of Request for Additional Information, dated April 14, 2025 (ADAMS Accession No. ML25094A145).

5. NRC letter to CEG, Limerick Generation Station, Unit Nos. 1 and 2 -

Response to Proposed Extension of Due Date of Request for Additional Information re Component Interface Module (EPID L-2022-LLA-0140),

dated April 16, 2025 (ADAMS Accession No. ML25101A252).

6. Closed Meeting between NRC and CEG on June 25, 2025 regarding the Digital Modernization License Amendment Request (LAR) for Limerick Generating Station, Units 1 and 2 (Meeting Notice dated May 19, 2025, ADAMS Accession No. ML25139A586).

In Reference 1 Constellation Energy Generation, LLC (CEG) requested a License Amendment Request (LAR) to facilitate replacement of the Limerick Generating Station, Units 1 and 2 (LGS) existing safety-related analog control systems with a single digital Plant Protection System (PPS). In Reference 2, CEG submitted a LAR supplement that replaced in its entirety the original LAR. CEG replaced the original submittal to address issues associated with proprietary/non-proprietary information.

In Reference 3, the NRC provided four requests for confirmatory information (RCIs) and eight requests for additional information (RAIs) to support the NRCs review of the Reference 2 LAR. As part of Reference 3, the NRC requested CEG to provide responses to the RCIs and RAIs by April 6, 2025 (i.e., 90 days from the date of Reference 3). In Reference 4 CEG requested an additional 90 days, through July 7, 2025, to respond.

Reference 5 is the NRC approval of the extension request.

Based on discussions during the Reference 6 meeting, CEG requests an additional 60 days from the date of Reference 3 to respond (September 5, 2025).

This letter contains no regulatory commitments.

In accordance with 10 CFR 50.91, Notice for public comment; State consultation, paragraph (b), CEG is notifying the Commonwealth of Pennsylvania of this license amendment request supplement by transmitting a copy of this letter to the designated State Official.

Proposed Extension - Response to RAIs Limerick Digital Modernization Project Docket Nos. 50-352 and 50-353 JuO\\ , 2025 Page 3 If you have any questions regarding this submittal, then please contact Ms. Ashley Rickey at Ashley.Rickey@Constellation.com.

I declare under penalty of perjury that the foregoing is true and correct. Executed on this

QG day of JuO\\, 2025.

Respectfully, Wendi E. Para Senior Manager, Licensing and Regulatory Affairs Constellation Energy Generation, LLC cc:

USNRC Region I, Regional Administrator w/ attachments USNRC Project Manager, LGS USNRC Senior Resident Inspector, LGS Director, Bureau of Radiation Protection - Pennsylvania Department of Environmental Protection Respectfully,