# Constellation Energy Generation, LLC; LaSalle County Station, Units 1 and 2; License Amendment Request
**AGENCY:**
Nuclear Regulatory Commission.
**ACTION:**
Opportunity to comment, request a hearing and to petition for leave to intervene.
**SUMMARY:**
The U.S. Nuclear Regulatory Commission (NRC) is considering issuance of amendments to Renewed Facility Operating Licenses (RFOLs) No. NPF-11 and NPF-18, issued to Constellation Energy Generation, LLC (Constellation, the licensee) for LaSalle County Station, Units 1 and 2 (LaSalle). The proposed license amendments, if granted, would temporarily revise the Technical Specification (TS) Limiting Condition for Operation (LCO) 3.3.7.1, “Control Room Area Filtration (CRAF) System Instrumentation,” until December 31, 2027. The Atomic Energy Act of 1954, as amended, (the Act) grants the Commission authority to issue and make immediately effective any amendment to an operating license upon a determination by the Commission that such amendment involves no significant hazards consideration (NSHC), notwithstanding the pendency before the Commission of a request for a hearing from any person. For this amendment request, the NRC proposes to determine that it involves NSHC.
**DATES:**
Submit comments by March 16, 2026. Comments received after this date will be considered if it is practical to do so, but the NRC is able to ensure consideration only for comments received on or before this date. Requests for a hearing or petition for leave to intervene must be filed by April 14, 2026.
**ADDRESSES:**
You may submit comments by any of the following methods however, the NRC encourages electronic comment submission through the Federal rulemaking website.
• *Federal rulemaking website:* Go to *https://www.regulations.gov* and search for Docket ID NRC-2026-0727. Address questions about Docket IDs in *Regulations.gov* to Bridget Curran; telephone: 301-415-1003; email: *[email protected]* . For technical questions, contact the individual(s) listed in the *FOR FURTHER INFORMATION CONTACT* section of this document.
• *Mail comments to:* Office of Administration, Mail Stop: TWFN-5-A85, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, ATTN: Program Management, Announcements and Editing Staff.
For additional direction on obtaining information and submitting comments, see “Obtaining Information and Submitting Comments” in the *SUPPLEMENTARY INFORMATION* section of this document.
**FOR FURTHER INFORMATION CONTACT:**
Robert Kuntz, Office of Nuclear Reactor Regulation, U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001; telephone: 301-415-3733; email: *[email protected]* .
**SUPPLEMENTARY INFORMATION:**
**I. Obtaining Information and Submitting Comments**
**A. Obtaining Information**
Please refer to Docket ID NRC-2026-0727 when contacting the NRC about the availability of information for this action. You may obtain publicly available information related to this action by any of the following methods:
• *Federal Rulemaking website:* Go to *https://www.regulations.gov* and search for Docket ID NRC-2026-0727.
• *NRC's Agencywide Documents Access and Management System (ADAMS):* You may obtain publicly available documents online in the ADAMS Public Documents collection at *https://www.nrc.gov/reading-rm/adams.html* . To begin the search, select “Begin ADAMS Public Search.” For problems with ADAMS, please contact the NRC's Public Document Room (PDR) reference staff at 1-800-397-4209, at 301-415-4737, or by email to *[email protected]* . The amendment request is available in ADAMS under Accession No. ML26028A402.
• *NRC's PDR:* The PDR, where you may examine and order copies of publicly available documents, is open by appointment. To make an appointment to visit the PDR, please send an email to *[email protected]* or call 1-800-397-4209 or 301-415-4737, between 8 a.m. and 4 p.m. eastern time (ET), Monday through Friday, except Federal holidays.
**B. Submitting Comments**
The NRC encourages electronic comment submission through the Federal rulemaking website ( *https://www.regulations.gov* ). Please include Docket ID NRC-2026-0727 in your comment submission.
The NRC cautions you not to include identifying or contact information that you do not want to be publicly disclosed in your comment submission. The NRC will post all comment submissions at *https://www.regulations.gov* as well as enter the comment submissions into ADAMS. The NRC does not routinely edit comment submissions to remove identifying or contact information.
If you are requesting or aggregating comments from other persons for submission to the NRC, then you should inform those persons not to include identifying or contact information that they do not want to be publicly disclosed in their comment submission. Your request should state that the NRC does not routinely edit comment submissions to remove such information before making the comment submissions available to the public or entering the comment into ADAMS.
**II. Introduction**
The NRC is considering issuance of amendments to Renewed Facility Operating Licenses (RFOL) Nos. NPF-11 and NPF-18 for LaSalle County Station, Units 1 and 2 (LaSalle), located in LaSalle County, Illinois.
Constellation Energy Generation, LLC (Constellation, the licensee) submitted the request for these license amendments via letter dated January 28, 2026 (ADAMS Accession No. ML26028A402). The amendments, if granted, would temporarily revise the Technical Specification (TS) Limiting Condition for Operation (LCO) 3.3.7.1, “Control Room Area Filtration (CRAF) System Instrumentation,” such that, if one of the CRAF trip subsystems becomes inoperable, the licensee will have 21 days to restore the inoperable subsystem. During that period, automatic actuation is not single-failure proof. This change would only apply to radiation monitor failure and apply until December 31, 2027. The proposed change would also fix a typographical error in the TS.
Before issuance of the proposed license amendments, the NRC will need to make the findings required by the Atomic Energy Act of 1954, as amended (the Act), and NRC's regulations.
The Commission finds that the licensee's analyses provided, consistent with section 50.91 of title 10 of the *Code of Federal Regulations* (10 CFR) “Notice for public comment; State consultation,” are sufficient to support the proposed determination that this amendment request involves NSHC. Under the NRC's regulations in 10 CFR 50.92, operation of the facility in accordance with the proposed amendment would not (1) involve a significant increase in the probability or consequences of an accident previously evaluated; or (2) create the possibility of a new or different kind of accident from any accident previously evaluated; or (3) involve a significant reduction in a margin of safety. As required by 10 CFR 50.91(a), the licensee has provided its analysis of the issue of no significant hazards consideration, which is presented as follows:
1. Does the proposed amendment involve a significant increase in the probability or consequences of an accident previously evaluated?
*Response:* No.
The proposed changes do not alter any of the previously evaluated accidents in the UFSAR [Updated Final Safety Analysis Report]. The proposed changes do not affect any of the initiators of previously evaluated accidents in a manner that would increase the likelihood of the event. The proposed change would allow one of the two trip systems for a CRAF subsystem to be inoperable for up to 21 days. This would result in single failure criterion not to being maintained for this time period. However, manual initiation of the CRAF subsystem would continue to be available per station operating procedures in the event that automatic initiation does not occur from the remaining operable trip system.
The CRAF subsystem is not an initiator of any accident previously evaluated. The CRAF and the associated subsystems are used to mitigate the consequences of an accident. It is designed to maintain the Control Room habitable for operators and continued equipment operation. The CRAF is not an accident initiator for any previously evaluated accident.
Therefore, the proposed change does not involve a significant increase in the probability or consequences of an accident previously evaluated.
2. Does the proposed amendment create the possibility of a new or different kind of accident from any accident previously evaluated?
*Response:* No.
The proposed changes will not introduce any new operating modes, safety-related equipment lineups, accident scenarios, system interactions, or failure modes that would create a new or different type of accident. Failure of the system will have the same effect as the present design.
The CRAF subsystem is not being modified by this proposed change, only the associated TS. The proposed change would allow one of the two trip systems for a CRAF subsystem to be inoperable for up to 21 days. The changes do not involve a physical alteration of the plant ( *i.e.,* no new or different type of equipment will be installed) or a change in the methods governing normal plant operation ( *e.g.,* continue to use the same procedures to manually start the system in the event automatic actuation fails). In addition, the changes do not impose any new or different requirements that could involve a new or different kind of accident previously evaluated. The changes do not alter assumptions made in the safety analysis.
Therefore, the proposed change does not create the possibility of a new or different kind of accident from any accident previously evaluated.
3. Does the proposed amendment involve a significant reduction in a margin of safety?
*Response:* No.
The proposed change will not significantly reduce the margin of safety. The CRAF subsystem is not being modified by this proposed change, only the associated TS. The CRAF subsystem will still provide a habitable environment by ensuring adequate radiation protection to permit access to and occupancy of the control room following a DBA [design basis accident]. The proposed change would allow one of the two trip systems for a CRAF subsystem to be inoperable for up to 21 days during which time the automatic actuation is not single-failure proof. Existing procedures for manual start or restoration of the CRAF system remain in place and are deemed adequate for the 21-day period to ensure that habitability of the control is maintained following an accident in the event of automatic actuation failure. The additional time provided for the condition with one trip system inoperable does not change any analyses, system operational setpoints, or limited safety system settings required by the accident analyses.
Therefore, the proposed changes do not involve a significant reduction in a margin of safety.
The NRC staff has reviewed the licensee's analysis and, based on this review, it appears that the three standards of 10 CFR 50.92(c) are satisfied. Therefore, the NRC staff proposes to determine that the license amendment request involves NSHC.
The Commission is seeking public comments on this proposed determination that the license amendment request involves NSHC. Any comments received within 30 days after the date of publication of this notice will be considered in making any final determination.
Normally, the Commission will not issue the amendment until the expiration of 60 days after the date of publication of this notice. The Commission may issue the license amendment before expiration of the 60-day notice period provided that its final determination is that the amendment involves NSHC. In addition, the Commission may issue the amendment prior to the expiration of the 30-day comment period if circumstances change during the 30-day comment period such that failure to act in a timely way would result, for example, in derating or shutdown of the facility. If the Commission takes action prior to the expiration of either the comment period or the notice period, it will publish in the *Federal Register* a notice of issuance. If the Commission makes a final NSHC determination, any hearing will take place after issuance. The Commission expects that the need to take this action will occur very infrequently.
**III. Opportunity To Request a Hearing and Petition for Leave To Intervene**
Within 60 days after the date of publication of this notice, any person (petitioner) whose interest may be affected by this action may file a request for a hearing and petition for leave to intervene (petition) with respect to the action. Petitions shall be filed in accordance with the Commission's “Agency Rules of Practice and Procedure” in 10 CFR part 2. Interested persons should consult 10 CFR 2.309. If a petition is filed, the presiding officer will rule on the petition and, if appropriate, a notice of a hearing will be issued.
Petitions must be filed no later than 60 days from the date of publication of this notice in accordance with the filing instructions in the “Electronic Submissions (E-Filing)” section of this document. Petitions and motions for leave to file new or amended contentions that are filed after the deadline will not be entertained absent a determination by the presiding officer that the filing demonstrates good cause by satisfying the three factors in 10 CFR 2.309(c)(1)(i) through (iii).
If a hearing is requested, and the Commission has not made a final determination on the issue of no significant hazards consideration, the Commission will make a final determination on the issue of no significant hazards consideration, which will serve to establish when the hearing is held. If the final determination is that the amendment request involves no significant hazards consideration, the Commission may issue the amendment and make it immediately effective, notwithstanding the request for a hearing. Any hearing would take place after issuance of the amendment. If the final determination is that the amendment request involves a significant hazards consideration, then any hearing held would take place before the issuance of the amendment unless the Commission finds an imminent danger to the health or safety of the public, in which case it will issue an appropriate order or rule under 10 CFR part 2.
A State, local governmental body, Federally recognized Indian Tribe, or designated agency thereof, may submit a petition to the Commission to participate as a party under 10 CFR 2.309(h) no later than 60 days from the date of publication of this notice. Alternatively, a State, local governmental body, Federally recognized Indian Tribe, or designated agency thereof may participate as a non-party under 10 CFR 2.315(c).
For information about filing a petition and about participation by a person not a party under 10 CFR 2.315, see ADAMS Accession No. ML20340A053 ( *https://adamswebsearch2.nrc.gov/webSearch2/main.jsp?AccessionNumber=ML20340A053* ) and on the NRC's public website ( *https://www.nrc.gov/about-nrc/regulatory/adjudicatory/hearing.html#participate* ).
**IV. Electronic Submissions and E-Filing**
All documents filed in NRC adjudicatory proceedings, including documents filed by an interested State, local governmental body, Federally recognized Indian Tribe, or designated agency thereof that requests to participate under 10 CFR 2.315(c), must be filed in accordance with 10 CFR 2.302. The E-Filing process requires participants to submit and serve all adjudicatory documents over the internet, or in some cases, to mail copies on electronic storage media, unless an exemption permitting an alternative filing method, as further discussed, is granted. Detailed guidance on electronic submissions is located in the “Guidance for Electronic Submissions to the NRC” (ML13031A056), and on the NRC's public website ( *https://www.nrc.gov/site-help/e-submittals.html* ).
To comply with the procedural requirements of E-Filing, at least 10 days prior to the filing deadline, the participant should contact the Office of the Secretary by email at *[email protected],* or by telephone at 301-415-1677, to: (1) request a digital identification (ID) certificate which allows the participant (or its counsel or representative) to digitally sign submissions and access the E-Filing system for any proceeding in which it is participating; and (2) advise the Secretary that the participant will be submitting a petition or other adjudicatory document (even in instances in which the participant, or its counsel or representative, already holds an NRC-issued digital ID certificate). Based upon this information, the Secretary will establish an electronic docket for the proceeding if the Secretary has not already established an electronic docket.
Information about applying for a digital ID certificate is available on the NRC's public website at *https://www.nrc.gov/site-help/e-submittals/getting-started.html.* After a digital ID certificate is obtained and a docket is created, the participant must submit adjudicatory documents in the Portable Document Format. Guidance on submissions is available on the NRC's public website at *https://www.nrc.gov/site-help/electronic-sub-ref-mat.html.* A filing is considered complete at the time the document is submitted through the NRC's E-Filing system. To be timely, an electronic filing must be submitted to the E-Filing system no later than 11:59 p.m. ET on the due date. Upon receipt of a transmission, the E-Filing system time-stamps the document and sends the submitter an email confirming receipt of the document. The E-Filing system also distributes an email that provides access to the document to the NRC's Office of the General Counsel and any others who have advised the Office of the Secretary that they wish to participate in the proceeding, so that the filer need not serve the document on those participants separately. Therefore, applicants and other participants (or their counsel or representative) must apply for and receive a digital ID certificate before adjudicatory documents are filed in order to obtain access to the documents via the E-Filing system.
A person filing electronically using the NRC's adjudicatory E-Filing system may seek assistance by contacting the NRC's Electronic Filing Help Desk through the “Contact Us” link located on the NRC's public website at *https://www.nrc.gov/site-help/e-submittals.html,* by email to *[email protected],* or by a toll-free call at 1-866-672-7640. The NRC Electronic Filing Help Desk is available between 9 a.m. and 6 p.m., ET, Monday through Friday, except Federal holidays.
Participants who believe that they have good cause for not submitting documents electronically must file an exemption request, in accordance with 10 CFR 2.302(g), with their initial paper filing stating why there is good cause for not filing electronically and requesting authorization to continue to submit documents in paper format. Such filings must be submitted in accordance with 10 CFR 2.302(b)-(d). Participants filing adjudicatory documents in this manner are responsible for serving their documents on all other participants. Participants granted an exemption under 10 CFR 2.302(g)(2) must still meet the electronic formatting requirement in 10 CFR 2.302(g)(1), unless the participant also seeks and is granted an exemption from 10 CFR 2.302(g)(1).
Documents submitted in adjudicatory proceedings will appear in the NRC's electronic hearing docket, which is publicly available at *https://adams.nrc.gov/ehd,* unless otherwise excluded pursuant to an order of the presiding officer. If you do not have an NRC-issued digital ID certificate as previously described, click “cancel” when the link requests certificates and you will be automatically directed to the NRC's electronic hearing docket where you will be able to access any publicly available documents in a particular hearing docket. Participants are requested not to include personal privacy information such as social security numbers, home addresses, or personal phone numbers in their filings unless an NRC regulation or other law requires submission of such information. With respect to copyrighted works, except for limited excerpts that serve the purpose of the adjudicatory filings and would constitute a Fair Use application, participants should not include copyrighted materials in their submission.
For further details with respect to this action, see the application for license amendment dated January 28, 2026 (ADAMS Accession No. ML26028A402).
*Attorney for licensee:* Roland Blackhaus, Senior Lead Counsel-Nuclear, Vistra Corp., 325 7th Street NW, Suite 520, Washington, DC 20004.
*NRC Branch Chief:* Ilka Berrios.
For the Nuclear Regulatory Commission.
Dated: February 11, 2026.
Robert Kuntz,
Project Manager, Plant Licensing Branch III, Division of Operating Reactor Licensing, Office of Nuclear Reactor Regulation.