IR 05000352/2025501
| 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
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
Inspection Report
Docket Numbers:
05000352 and 05000353
License Numbers:
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
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.
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,
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) 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,
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.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
Resulting from
Inspection
04916331
11/21/2025
04916973
11/25/2025
04919067
2/04/2025
Miscellaneous
Limerick Clean Energy Center NRC Graded EP Exercise
Scenario
11/18/2025
Constellation Standardized Radiological Emergency Plan
Revision 34
Radiological Emergency Plan Annex for Limerick Generating
Station
Revision 33
Procedures
CFR 50.54(q) Change Evaluation
Revision 11