ML25351A061
| ML25351A061 | |
| Person / Time | |
|---|---|
| Site: | Limerick  |
| Issue date: | 12/17/2025 |
| From: | Brice Bickett Division of Operating Reactors |
| To: | Mudrick C Constellation Energy Generation, Constellation Nuclear |
| References | |
| IR 2025501 | |
| Download: ML25351A061 (0) | |
Text
December 17, 2025 Christopher H. Mudrick Senior Vice President and Chief Nuclear Officer Constellation Energy Generation, LLC President Constellation Nuclear 200 Energy Way, KSA-3N Kennet Square, PA 19348
SUBJECT:
LIMERICK GENERATING STATION, UNITS 1 AND 2 - EMERGENCY PREPAREDNESS BIENNIAL EXERCISE INSPECTION REPORT 05000352/2025501 AND 05000353/2025501
Dear Christopher Mudrick:
On December 4, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Limerick Generating Station, Units 1 and 2, and discussed the results of this inspection with William Levis, Plant Manager, and other members of your staff. The results of this inspection are documented in the enclosed report.
No findings or violations of more than minor significance were identified during this inspection.
This letter, its enclosure, and your response (if any) will be made available for public inspection and copying at http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in accordance with Title 10 of the Code of Federal Regulations 2.390, Public Inspections, Exemptions, Requests for Withholding.
Sincerely, Brice A. Bickett, Chief Security, Emergency Preparedness and Incident Response Branch Division of Radiological Safety and Security Docket Nos. 05000352 and 05000353 License Nos. NPF-39 and NPF-85
Enclosure:
As stated cc w/ encl: Distribution via LISTSERV BRICE BICKETT Digitally signed by BRICE BICKETT Date: 2025.12.17 10:22:39 -05'00'
ML25351A061 SUNSI Review Non-Sensitive Sensitive Publicly Available Non-Publicly Available OFFICE RI/DRSS RI/DRSS NAME SMercurio BBickett DATE 12/17/2025 12/17/2025
Enclosure U.S. NUCLEAR REGULATORY COMMISSION Inspection Report Docket Numbers:
05000352 and 05000353 License Numbers:
NPF-39 and NPF-85 Report Numbers:
05000352/2025501 and 05000353/2025501 Enterprise Identifier: I-2025-501-0002 Licensee:
Constellation Energy Generation, LLC Facility:
Limerick Generating Station, Units 1 and 2 Location:
Sanatoga, PA 19464 Inspection Dates:
November 17, 2025 to November 20, 2025 Inspectors:
J. Ambrosini, Nuclear Engineer J. Kepley, Operations Engineer J. Kulp, Senior Reactor Inspector S. Mercurio, Emergency Preparedness Inspector L. Sinclair, Senior Operations Engineer Approved By:
Brice A. Bickett, Chief Security, Emergency Preparedness and Incident Response Branch Division of Radiological Safety and Security
2
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an emergency preparedness biennial exercise inspection at Limerick Generating Station, Units 1 and 2, in accordance with the Reactor Oversight Process.
The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.
List of Findings and Violations No findings or violations of more than minor significance were identified.
Additional Tracking Items None.
3 INSPECTION SCOPES Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.
REACTOR SAFETY 71114.01 - Exercise Evaluation Inspection Review (IP Section 02.01-02.11) (1 Sample)
(1)
The inspectors evaluated the biennial emergency plan exercise. The exercise scenario simulated thermo-hydraulic instabilities and an un-isolable steam leak resulting in increased drywell radiation levels on November 18, 2025.
71114.04 - Emergency Action Level and Emergency Plan Changes Inspection Review (IP Section 02.01-02.03) (1 Sample)
(1)
The inspectors evaluated the following submitted Emergency Action Level and Emergency Plan changes:
23-46, Mid-Atlantic PAR Flowchart Changes - Decennial ETE Project, EP-AA-111-F-11, Limerick PAR Flowchart, Revision E 24-42, EP-AA-1008, Radiological Emergency Plan Annex for Limerick Generating Station, Revision 33 24-49, EP-AA-1000, Standardized Radiological Emergency Plan, Revision 34 25-09, EP-AA-1008 Addendum 3, Limerick U2 RPV Level EAL Change, Revision 008 This evaluation does not constitute NRC approval.
71114.08 - Exercise Evaluation - Scenario Review Inspection Review (IP Section 02.01 - 02.04) (1 Sample)
(1)
The inspectors reviewed and evaluated the proposed scenario for biennial emergency plan exercise on November 17, 2025.
4 OTHER ACTIVITIES - BASELINE 71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)
(1)
October 1, 2024 through September 30, 2025 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13)
(1 Sample)
(1)
October 1, 2024 through September 30, 2025 EP04: Emergency Response Facility and Equipment Readiness (ERFER) (IP Section 02.14)
(1 Sample)
This is a new NRC performance indicator, introduced in NEI 99-02, Revision 8 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML24331A114).
Licensees began collecting data for this performance indicator on January 1, 2025.
(1)
January 1, 2025 through September 30, 2025 INSPECTION RESULTS No findings were identified.
EXIT MEETINGS AND DEBRIEFS The inspectors verified that no proprietary information was retained or documented in this report.
On December 4, 2025, the inspectors presented the emergency preparedness biennial exercise inspection results to William Levis, Plant Manager, and other members of the licensee staff.
5 DOCUMENTS REVIEWED Inspection Procedure Type Designation Description or Title Revision or Date 71114.01 Corrective Action Documents Resulting from Inspection 04916331 11/21/2025 04916973 11/25/2025 04919067 12/04/2025 Miscellaneous Limerick Clean Energy Center NRC Graded EP Exercise Scenario 11/18/2025 EP-AA-1000 Constellation Standardized Radiological Emergency Plan Revision 34 EP-AA-1008 Radiological Emergency Plan Annex for Limerick Generating Station Revision 33 71114.04 Procedures EP-AA-120-1001 10 CFR 50.54(q) Change Evaluation Revision 11