ML24180A157: Difference between revisions

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June 28, 2024
June 28, 2024


U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001
U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001


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
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
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In accordance with 10 CFR 50.90, Constellation Energy Generation, LLC (CEG) requested a License Amendment Request (LAR) to replace the Limerick Generating Station, Units 1 and 2 existing safety-related analog control systems with a single digital Plant Protection System (PPS) (Reference 1).
In accordance with 10 CFR 50.90, Constellation Energy Generation, LLC (CEG) requested a License Amendment Request (LAR) to replace the Limerick Generating Station, Units 1 and 2 existing safety-related analog control systems with a single digital Plant Protection System (PPS) (Reference 1).


In Reference 2, CEG submitted a LAR supplement that replaced in its entirety the original license amendment request , dated September 26, 2022. CEG replaced the original submittal to address issues associated with proprietary/non-proprietary information.
In Reference 2, CEG submitted a LAR supplement that replaced in its entirety the original license amendment request, dated September 26, 2022. CEG replaced the original submittal to address issues associated with proprietary/non-proprietary information.


In Reference 3, the NRC notified CEG that there were issues with several of the 10CFR2.390 requests to withhold from public disclosure associated with the Reference 2 submittal and additional post LAR submittal documents, and noticed a closed meeting on May 22, 2024. The purpose of the meeting was to discuss the proprietary determination of certain documents related to the LAR to support a digital modernization project being considered for Limerick Generating Station, Units 1 and 2.
In Reference 3, the NRC notified CEG that there were issues with several of the 10CFR2.390 requests to withhold from public disclosure associated with the Reference 2 submittal and additional post LAR submittal documents, and noticed a closed meeting on May 22, 2024. The purpose of the meeting was to discuss the proprietary determination of certain documents related to the LAR to support a digital modernization project being considered for Limerick Generating Station, Units 1 and 2.


Per Reference 4, in a closed meeting, NRC and CEG reviewed outstanding issues identified per Reference 3 and aligned on the need to request a return of three WEC documents (EQ-EV-386-GLIM, EQ-QR-433-GLIM, and APP-GW-GLR-611) and to replace them with revised proprietary and non-proprietary versions to address NRC proprietary review concerns.
Per Reference 4, in a closed meeting, NRC and CEG reviewed outstanding issues identified per Reference 3 and aligned on the need to request a return of three WEC documents (EQ-EV-386-GLIM, EQ-QR-433-GLIM, and APP-GW-GLR-611) and to replace them with revised proprietary and non-proprietary versions to address NRC proprietary review concerns.
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LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents.
LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents.
to this letter contains the non-proprietary WEC LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents.
to this letter contains the non-proprietary WEC LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents.
to this letter contains the WEC affidavit, CAW-24-035, Revision 0, for .
to this letter contains the WEC affidavit, CAW-24-035, Revision 0, for.
contains the affidavit signed by WEC, the owner of the proprietary information.
contains the affidavit signed by WEC, the owner of the proprietary information.
The affidavit sets forth the basis upon which the information may be withheld from public disclosure by the NRC, and it addresses with specificity the considerations listed in paragraph (b)(4) of 10 CFR 2.390 of the NRCs regulations. WEC requests that the WEC proprietary information contained in Attachment 1 be withheld from public disclosure in accordance with 10 CFR 2.390. Future correspondence with respect to   the proprietary aspects of the application for withholding related to WEC proprietary information or the WEC affidavit provided in the applicable Attachment should reference this request letter.
The affidavit sets forth the basis upon which the information may be withheld from public disclosure by the NRC, and it addresses with specificity the considerations listed in paragraph (b)(4) of 10 CFR 2.390 of the NRCs regulations. WEC requests that the WEC proprietary information contained in Attachment 1 be withheld from public disclosure in accordance with 10 CFR 2.390. Future correspondence with respect to the proprietary aspects of the application for withholding related to WEC proprietary information or the WEC affidavit provided in the applicable Attachment should reference this request letter.


CEG has reviewed the information supporting a finding of no significant hazards consideration, and the environmental consideration, which was previously provided to the NRC in the Reference 2 letter. CEG has concluded that the information provided in this supplemental letter does not affect the bases for concluding that the proposed license amendments do not involve a significant hazards consideration under the standards set forth in 10 CFR 50.92. In addition, CEG has concluded that the information in this supplemental letter does not affect the bases for concluding that neither an environmental impact statement nor an environmental assessment needs to be prepared in connection with the proposed amendments.
CEG has reviewed the information supporting a finding of no significant hazards consideration, and the environmental consideration, which was previously provided to the NRC in the Reference 2 letter. CEG has concluded that the information provided in this supplemental letter does not affect the bases for concluding that the proposed license amendments do not involve a significant hazards consideration under the standards set forth in 10 CFR 50.92. In addition, CEG has concluded that the information in this supplemental letter does not affect the bases for concluding that neither an environmental impact statement nor an environmental assessment needs to be prepared in connection with the proposed amendments.


This supplemental letter contains no regulatory commitments.
This supplemental letter contains no regulatory commitments.
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David P. Helker Sr. Manager - Licensing Constellation Energy Generation, LLC
David P. Helker Sr. Manager - Licensing Constellation Energy Generation, LLC


Attachments: 1. LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents. (Proprietary)
Attachments: 1. LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents. (Proprietary)
: 2. LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents. (Non-Proprietary)
: 2. LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents. (Non-Proprietary)
: 3. WEC Affidavit, CAW-24-035, Revision 0, for Attachment 1
: 3. WEC Affidavit, CAW-24-035, Revision 0, for Attachment 1


cc:   USNRC Region I, Regional Administrator   w/ attachments USNRC Project Manager, LGS                                           "
cc: USNRC Region I, Regional Administrator w/ attachments USNRC Project Manager, LGS "
USNRC Senior Resident Inspector, LGS                                 "
USNRC Senior Resident Inspector, LGS "
Director, Bureau of Radiation Protection - Pennsylvania             w/o attachment 1 Department of Environmental Protection
Director, Bureau of Radiation Protection - Pennsylvania w/o attachment 1 Department of Environmental Protection


Attachment           3
Attachment 3


License Amendment Request           Supplement
License Amendment Request Supplement


Limerick Generating Station, Units 1 and 2 Docket Nos. 50-352 and 50-353
Limerick Generating Station, Units 1 and 2 Docket Nos. 50-352 and 50-353
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County of Butler:
County of Butler:


(1)                                                                                 I, Zachary Harper, Senior Manager, Licensing, have been spe cifically delegated and authorized to apply for withholding and execute this Affidavit on behalf of Westinghouse Electric Company LLC (Westinghouse).
(1) I, Zachary Harper, Senior Manager, Licensing, have been spe cifically delegated and authorized to apply for withholding and execute this Affidavit on behalf of Westinghouse Electric Company LLC (Westinghouse).


(2)                                                                                 I am requesting the proprietary portions of LIM-24-090, Revision 0 be withheld from public disclosure under 10 CFR 2.390.
(2) I am requesting the proprietary portions of LIM-24-090, Revision 0 be withheld from public disclosure under 10 CFR 2.390.


(3)                                                                                 I have personal knowledge of the criteria and procedures ut ilized by Westinghouse in designating information as a trade secret, privileged, or as co nfidential commercial or financial information.
(3) I have personal knowledge of the criteria and procedures ut ilized by Westinghouse in designating information as a trade secret, privileged, or as co nfidential commercial or financial information.


(4)                                                                                 Pursuant to 10 CFR 2.390, the following is furnished for co nsideration by the Commission in determining whether the information sought to be withheld from   public disclosure should be withheld.
(4) Pursuant to 10 CFR 2.390, the following is furnished for co nsideration by the Commission in determining whether the information sought to be withheld from public disclosure should be withheld.
(i)                                                                                         The information sought to be withheld from public disclosure is owned and has been held in confidence by Westinghouse and is not customarily disclosed to the public.
(i) The information sought to be withheld from public disclosure is owned and has been held in confidence by Westinghouse and is not customarily disclosed to the public.
(ii)                                                                             The information sought to be withheld is being transmitted to the Commission in confidence and, to Westinghouses knowledge, is not available in public sources.
(ii) The information sought to be withheld is being transmitted to the Commission in confidence and, to Westinghouses knowledge, is not available in public sources.
(iii)                                                                 Westinghouse notes that a showing of substantial harm is no longer an applicable criterion for analyzing whether a document should be withheld f rom public disclosure. Nevertheless, public disclosure of this proprietar y information is likely to cause substantial harm to the competitive position of Westingho use because it would enhance the ability of competitors to provide similar technical evaluation justifications and licensing defense services for commercial power reactors without commensurate expenses. Also, public disclosure of the informat ion would enable others to use the information to meet NRC requirements for licensing documentation without purchasing the right to use the information.
(iii) Westinghouse notes that a showing of substantial harm is no longer an applicable criterion for analyzing whether a document should be withheld f rom public disclosure. Nevertheless, public disclosure of this proprietar y information is likely to cause substantial harm to the competitive position of Westingho use because it would enhance the ability of competitors to provide similar technical evaluation justifications and licensing defense services for commercial power reactors without commensurate expenses. Also, public disclosure of the informat ion would enable others to use the information to meet NRC requirements for licensing documentation without purchasing the right to use the information.


  *** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
  *** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 2 of 3
Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 2 of 3


(5)                                                                                 Westinghouse has policies in place to identify proprietary   information. Under that system, information is held in confidence if it falls in one or more of several types, the release of which might result in the loss of an existing or potential comp etitive advantage, as follows:
(5) Westinghouse has policies in place to identify proprietary information. Under that system, information is held in confidence if it falls in one or more of several types, the release of which might result in the loss of an existing or potential comp etitive advantage, as follows:
(a)                                                                                   The information reveals the distinguishing aspects of a p rocess (or component, structure, tool, method, etc.) where prevention of its use by any of Westinghouse's competitors without license from Westinghouse constitutes a competitive economic advantage over other compani es.
(a) The information reveals the distinguishing aspects of a p rocess (or component, structure, tool, method, etc.) where prevention of its use by any of Westinghouse's competitors without license from Westinghouse constitutes a competitive economic advantage over other compani es.
(b)                                                                                 It consists of supporting data, including test data, rela tive to a process (or component, structure, tool, method, etc.), the application of w hich data secures a competitive economic advantage (e.g., by optimization or improved marketability).
(b) It consists of supporting data, including test data, rela tive to a process (or component, structure, tool, method, etc.), the application of w hich data secures a competitive economic advantage (e.g., by optimization or improved marketability).
(c)                                                                                   Its use by a competitor would reduce his expenditure of r esources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing a similar product.
(c) Its use by a competitor would reduce his expenditure of r esources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing a similar product.
(d)                                                                                 It reveals cost or price information, production capaciti es, budget levels, or commercial strategies of Westinghouse, its customers or supplie rs.
(d) It reveals cost or price information, production capaciti es, budget levels, or commercial strategies of Westinghouse, its customers or supplie rs.
(e)                                                                                   It reveals aspects of past, present, or future Westinghouse or customer funded development plans and programs of potential commercial value to Westinghouse.
(e) It reveals aspects of past, present, or future Westinghouse or customer funded development plans and programs of potential commercial value to Westinghouse.
(f)                                                                                         It contains patentable ideas, for which patent protection   may be desirable.
(f) It contains patentable ideas, for which patent protection may be desirable.


(6)                                                                                 The attached documents are bracketed and marked to indicate the bases for withholding. The justification for withholding is indicated in both versions by   means of lower-case letters (a) through (f) located as a superscript immediately following the brackets enclosing each item of information being identified as proprietary or in the margin op posite such information. These lower-case letters refer to the types of information Westinghou se customarily holds in confidence identified in Sections (5)(a) through (f) of this Af fidavit.
(6) The attached documents are bracketed and marked to indicate the bases for withholding. The justification for withholding is indicated in both versions by means of lower-case letters (a) through (f) located as a superscript immediately following the brackets enclosing each item of information being identified as proprietary or in the margin op posite such information. These lower-case letters refer to the types of information Westinghou se customarily holds in confidence identified in Sections (5)(a) through (f) of this Af fidavit.


  *** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
*** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 3 of 3
Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 3 of 3


I declare that the averments of fact set forth in this Affidavi t are true and correct to the best of my knowledge, information, and belief. I declare under penalty of   perjury that the foregoing is true and correct.
I declare that the averments of fact set forth in this Affidavi t are true and correct to the best of my knowledge, information, and belief. I declare under penalty of perjury that the foregoing is true and correct.


Executedon:6/19/2024                                                                                                                                                                                                                                                                                             _____________________________ _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Executedon:6/19/2024 _____________________________ _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Signed electronically by Signededededededededededeededeeedeededddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddelectronically         by Zachary Harper
Signed electronically by Signededededededededededeededeeedeededddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddelectronically by Zachary Harper


  *** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
*** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
CAW-24-035   Revision   0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     Non-Proprietary   Class   3
CAW-24-035 Revision 0 Non-Proprietary Class 3


                                        **This page was added to the quality record by the PRIME system upon its validation and shall not be considered in the page nu                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               mbering of this document.**
**This page was added to the quality record by the PRIME system upon its validation and shall not be considered in the page nu mbering of this document.**
Approval Information
Approval Information


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Files approved on Jun-19-2024
Files approved on Jun-19-2024


                                                        *** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)}}
*** This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)}}

Latest revision as of 11:49, 4 October 2024

Request to Return and Replace WEC Documents (EQ-EV-386-GLIM, EQ-QR- 433-GLIM, and APP-GW-GLR-611), to Meet 10CFR2.390 Request to Withdraw from Public Disclosure Requirements
ML24180A157
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 06/28/2024
From: David Helker
Constellation Energy Generation
To:
Office of Nuclear Reactor Regulation, Document Control Desk
Shared Package
ML24180A156 List:
References
CAW-24-035, Rev. 0
Download: ML24180A157 (1)
v • d • e


Text

ATTACHMENT 1 TRANSMITTED HEREWITH CONTAINS PROPRIETARY INFORMATION -

WITHHOLD UNDER 10 CFR 2.390.

When separated from Attachment 1, this cover letter is decontrolled.

200 Energy Way Kennett Square, PA 19348

www.exeloncorp.com

10 CFR 50.90

June 28, 2024

U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001

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:

Request to Return and Replace WEC Documents (EQ-EV-386-GLIM, EQ-QR-433-GLIM, and APP-GW-GLR-611), to meet 10CFR2.390 Request to Withdraw from Public Disclosure Requirements

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. Constellation Energy Generation, LLC (CEG) letter to the U.S. Nuclear Regulatory Commission (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. Notice for Public closed meeting for May 22, 2024 between U.S. Nuclear Regulatory Commission and Constellation Energy Generation, LLC, Regarding Limerick Digital Instrumentation and Controls License Amendment Request (EPID L-2022-LLA-0140), dated May 7, 2024 (ML24129A010)
4. Summary of May 22, 2024, Closed Meeting with Constellation Energy Generation, LLC, related to the License Amendment Request to support Replacement of Existing Safety-Related Analog Control Systems with a single Digital Plant Protection System (EPID L-2022-LLA-0140), dated June 3, 2024 (ML24151A259)

ATTACHMENT 1 TRANSMITTED HEREWITH CONTAINS PROPRIETARY INFORMATION -

WITHHOLD UNDER 10 CFR 2.390.

When separated from Attachment 1, this cover letter is decontrolled.

Limerick DMP LAR-Request to Return and Replace 3 WEC Documents Docket Nos. 50-352 and 50-353 June 28, 2024 Page 2

In accordance with 10 CFR 50.90, Constellation Energy Generation, LLC (CEG) requested a License Amendment Request (LAR) to replace the Limerick Generating Station, Units 1 and 2 existing safety-related analog control systems with a single digital Plant Protection System (PPS) (Reference 1).

In Reference 2, CEG submitted a LAR supplement that replaced in its entirety the original license amendment request, dated September 26, 2022. CEG replaced the original submittal to address issues associated with proprietary/non-proprietary information.

In Reference 3, the NRC notified CEG that there were issues with several of the 10CFR2.390 requests to withhold from public disclosure associated with the Reference 2 submittal and additional post LAR submittal documents, and noticed a closed meeting on May 22, 2024. The purpose of the meeting was to discuss the proprietary determination of certain documents related to the LAR to support a digital modernization project being considered for Limerick Generating Station, Units 1 and 2.

Per Reference 4, in a closed meeting, NRC and CEG reviewed outstanding issues identified per Reference 3 and aligned on the need to request a return of three WEC documents (EQ-EV-386-GLIM, EQ-QR-433-GLIM, and APP-GW-GLR-611) and to replace them with revised proprietary and non-proprietary versions to address NRC proprietary review concerns.

Specifically, the NRC concluded that some of the information that WEC sought to redact from the documents did not meet the requirements for withholding provided in 10 CFR 2.390. WEC/CEG respectfully requests the NRC return both the redacted and unredacted previous revisions and replace with the below documents.

This letter addresses the issues identified during the meeting by providing the following modified non-proprietary redacted and proprietary documents, which are included in Attachments 1 and 2 to this letter. The proprietary versions (Items 1, 3 and 5 below) are contained in Attachment 1. The non-proprietary versions (Items 2, 4 and 6 below) are contained in Attachment 2.

1. EQ-EV-386-GLIM-P, Revision 2, Comparison of Equipment Qualification Hardware Testing for Common Q Applications to Limerick Requirements (Proprietary)
2. EQ-EV-386-GLIM-NP, Revision 2, Comparison of Equipment Qualification Hardware Testing for Common Q Applications to Limerick Requirements (Non-Proprietary)
3. EQ-QR-433-GLIM-P, Revision 4, Qualification Summary Report for the Plant Protection System Upgrade for Limerick Units 1 & 2 (Proprietary)
4. EQ-QR-433-GLIM-NP, Revision 4, Qualification Summary Report for the Plant Protection System Upgrade for Limerick Units 1 & 2 (Non-Proprietary)
5. APP-GW-GLR-611-P, Revision 3, ITAAC 2.5.02.14: Component Interface Module Design Process Technical Report (Proprietary)
6. APP-GW-GLR-611-NP, Revision 3, ITAAC 2.5.02.14: Component Interface Module Design Process Technical Report (Non-Proprietary)

The documents do not contain any technical changes from the versions that were previously submitted; only the proprietary redactions were updated. Please note, during the preparation of EQ-QR-433-GLIM, it was discovered that Figure 2.2-1 was erroneously deleted from

Limerick DMP LAR-Request to Return and Replace 3 WEC Documents Docket Nos. 50-352 and 50-353 June 28, 2024 Page 3

Revision 2 to Revision 3. Therefore, Revision 4 was created to add the figure back, and it is provided in this submittal. The modified updated EQ-EV-386-GLIM and APP-GW-GLR-611 retained the same revision numbers.

to this letter contains the proprietary Westinghouse Electric Company (WEC)

LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents.

to this letter contains the non-proprietary WEC LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents.

to this letter contains the WEC affidavit, CAW-24-035, Revision 0, for.

contains the affidavit signed by WEC, the owner of the proprietary information.

The affidavit sets forth the basis upon which the information may be withheld from public disclosure by the NRC, and it addresses with specificity the considerations listed in paragraph (b)(4) of 10 CFR 2.390 of the NRCs regulations. WEC requests that the WEC proprietary information contained in Attachment 1 be withheld from public disclosure in accordance with 10 CFR 2.390. Future correspondence with respect to the proprietary aspects of the application for withholding related to WEC proprietary information or the WEC affidavit provided in the applicable Attachment should reference this request letter.

CEG has reviewed the information supporting a finding of no significant hazards consideration, and the environmental consideration, which was previously provided to the NRC in the Reference 2 letter. CEG has concluded that the information provided in this supplemental letter does not affect the bases for concluding that the proposed license amendments do not involve a significant hazards consideration under the standards set forth in 10 CFR 50.92. In addition, CEG has concluded that the information in this supplemental letter does not affect the bases for concluding that neither an environmental impact statement nor an environmental assessment needs to be prepared in connection with the proposed amendments.

This supplemental 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 supplemental letter by transmitting a copy of this letter to the designated State Official.

If you have any questions regarding this submittal, then please contact Frank Mascitelli at Francis.Mascitelli@constellation.com.

Limerick DMP LAR-Request to Return and Replace 3 WEC Documents Docket Nos. 50-352 and 50-353 June 28, 2024 Page 4

I declare under penalty of perjury that the foregoing is true and correct. Executed on this 28th day of June 2024.

Respectfully,

David P. Helker Sr. Manager - Licensing Constellation Energy Generation, LLC

Attachments: 1. LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents. (Proprietary)

2. LIM-24-090, Revision 0, Limerick Units 1 and 2 Digital Modernization Project, Submittal of Limerick PPS LAR Proprietary and Non-Proprietary Documents. (Non-Proprietary)
3. WEC Affidavit, CAW-24-035, Revision 0, for Attachment 1

cc: USNRC Region I, Regional Administrator w/ attachments USNRC Project Manager, LGS "

USNRC Senior Resident Inspector, LGS "

Director, Bureau of Radiation Protection - Pennsylvania w/o attachment 1 Department of Environmental Protection

Attachment 3

License Amendment Request Supplement

Limerick Generating Station, Units 1 and 2 Docket Nos. 50-352 and 50-353

WEC Affidavit, CAW-24-035, Revision 0, for Attachment 1 Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 1 of 3

Commonwealth of Pennsylvania:

County of Butler:

(1) I, Zachary Harper, Senior Manager, Licensing, have been spe cifically delegated and authorized to apply for withholding and execute this Affidavit on behalf of Westinghouse Electric Company LLC (Westinghouse).

(2) I am requesting the proprietary portions of LIM-24-090, Revision 0 be withheld from public disclosure under 10 CFR 2.390.

(3) I have personal knowledge of the criteria and procedures ut ilized by Westinghouse in designating information as a trade secret, privileged, or as co nfidential commercial or financial information.

(4) Pursuant to 10 CFR 2.390, the following is furnished for co nsideration by the Commission in determining whether the information sought to be withheld from public disclosure should be withheld.

(i) The information sought to be withheld from public disclosure is owned and has been held in confidence by Westinghouse and is not customarily disclosed to the public.

(ii) The information sought to be withheld is being transmitted to the Commission in confidence and, to Westinghouses knowledge, is not available in public sources.

(iii) Westinghouse notes that a showing of substantial harm is no longer an applicable criterion for analyzing whether a document should be withheld f rom public disclosure. Nevertheless, public disclosure of this proprietar y information is likely to cause substantial harm to the competitive position of Westingho use because it would enhance the ability of competitors to provide similar technical evaluation justifications and licensing defense services for commercial power reactors without commensurate expenses. Also, public disclosure of the informat ion would enable others to use the information to meet NRC requirements for licensing documentation without purchasing the right to use the information.

      • This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 2 of 3

(5) Westinghouse has policies in place to identify proprietary information. Under that system, information is held in confidence if it falls in one or more of several types, the release of which might result in the loss of an existing or potential comp etitive advantage, as follows:

(a) The information reveals the distinguishing aspects of a p rocess (or component, structure, tool, method, etc.) where prevention of its use by any of Westinghouse's competitors without license from Westinghouse constitutes a competitive economic advantage over other compani es.

(b) It consists of supporting data, including test data, rela tive to a process (or component, structure, tool, method, etc.), the application of w hich data secures a competitive economic advantage (e.g., by optimization or improved marketability).

(c) Its use by a competitor would reduce his expenditure of r esources or improve his competitive position in the design, manufacture, shipment, installation, assurance of quality, or licensing a similar product.

(d) It reveals cost or price information, production capaciti es, budget levels, or commercial strategies of Westinghouse, its customers or supplie rs.

(e) It reveals aspects of past, present, or future Westinghouse or customer funded development plans and programs of potential commercial value to Westinghouse.

(f) It contains patentable ideas, for which patent protection may be desirable.

(6) The attached documents are bracketed and marked to indicate the bases for withholding. The justification for withholding is indicated in both versions by means of lower-case letters (a) through (f) located as a superscript immediately following the brackets enclosing each item of information being identified as proprietary or in the margin op posite such information. These lower-case letters refer to the types of information Westinghou se customarily holds in confidence identified in Sections (5)(a) through (f) of this Af fidavit.

      • This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)

Westinghouse Non-Proprietary Class 3 AFFIDAVIT CAW-24-035 Page 3 of 3

I declare that the averments of fact set forth in this Affidavi t are true and correct to the best of my knowledge, information, and belief. I declare under penalty of perjury that the foregoing is true and correct.

Executedon:6/19/2024 _____________________________ _______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

Signed electronically by Signededededededededededeededeeedeededddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddelectronically by Zachary Harper

      • This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)

CAW-24-035 Revision 0 Non-Proprietary Class 3

    • This page was added to the quality record by the PRIME system upon its validation and shall not be considered in the page nu mbering of this document.**

Approval Information

Manager Approval Harper Zachary S Jun-19-2024 16:24:58

Files approved on Jun-19-2024

      • This record was final approved on 06/19/2024 16:24:58. (This statement was added by the PRIME system upon its validation)
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