IR 05000277/2025001
| ML25133A026 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 05/13/2025 |
| From: | Sarah Elkhiamy Division of Operating Reactors |
| To: | Rhoades D Constellation Energy Generation |
| References | |
| IR 2025001 | |
| Download: ML25133A026 (1) | |
Text
May 13, 2025
SUBJECT:
PEACH BOTTOM ATOMIC POWER STATION, UNITS 2 AND 3 -
INTEGRATED INSPECTION REPORT 05000277/2025001 AND 05000278/2025001
Dear David Rhoades:
On March 31, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Peach Bottom Atomic Power Station, Units 2 and 3. On April 7, 2025, the NRC inspectors discussed the results of this inspection with Martin Bonifanti, Site Vice President, 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, Sarah H. Elkhiamy, Chief Operations Branch Division of Operating Reactor Safety
Docket Nos. 05000277 and 05000278 License Nos. DPR-44 and DPR-56
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000277 and 05000278
License Numbers:
Report Numbers:
05000277/2025001 and 05000278/2025001
Enterprise Identifier: I-2025-001-0048
Licensee:
Constellation Energy Generation, LLC
Facility:
Peach Bottom Atomic Power Station, Units 2 and 3
Location:
Delta, PA 17314
Inspection Dates:
January 1, 2025 to March 31, 2025
Inspectors:
L. Cline, Senior Resident Inspector
C. Dukehart, Resident Inspector
B. Dyke, Operations Engineer
T. Fish, Senior Operations Engineer
S. Haney, Senior Project Engineer
J. Kepley, Operations Engineer
S. Mercurio, Senior Emergency Preparedness Inspector
S. Rutenkroger, Senior Resident Inspector
Approved By:
Sarah H. Elkhiamy, Chief
Operations Branch
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Peach Bottom Atomic Power Station,
Units 2 and 3, 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.
PLANT STATUS
Unit 2 began the inspection period at rated thermal power (RTP). On March 14, 2025, the unit was down powered to 64 percent for a control rod sequence exchange and main turbine valve testing and returned to RTP on March 16, 2025. The unit remained at or near RTP for the remainder of the inspection period.
Unit 3 began the inspection period at RTP. On March 22, 2025, the unit was down powered to 30 percent to repair the '3B' recirculation pump adjustable speed drive and performed a rod pattern adjustment and main turbine valve testing and returned to RTP the following day. The unit remained at or near RTP for the remainder of the inspection period.
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 performed activities described in IMC 2515, Appendix D, Plant Status, observed risk significant activities, and completed on-site portions of IPs. 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
71111.01 - Adverse Weather Protection
Seasonal Extreme Weather Sample (IP Section 03.01) (1 Sample)
- (1) The inspectors evaluated readiness for seasonal extreme weather conditions in the station blackout (SBO) switchgear building, emergency diesel generator (EDG)building, battery rooms, and safe shutdown panel areas on January 21, 2025.
71111.04 - Equipment Alignment
Partial Walkdown Sample (IP Section 03.01) (1 Sample)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
- (1) Unit 3, 3A and 3C core spray on February 19, 2025
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (4 Samples)
The inspectors evaluated the implementation of the fire protection program by conducting a walkdown and performing a review to verify program compliance, equipment functionality, material condition, and operational readiness of the following fire areas:
- (1) Unit common, fire area PF-132, diesel generator building, general area, on January 30, 2025
- (2) Unit 2, fire area, PF-1, '2A' and '2C' residual heat removal (RHR) pump and heat exchanger room on February 11, 2025
- (3) Unit 3, fire areas PF-12/13D/13E, 3A and 3C core spray room, elevation 91 6, on February 19, 2025
- (4) Unit 3, fire area PF-9, '3D' RHR pump and heat exchanger room on March 27, 2025
Fire Brigade Drill Performance Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated the onsite fire brigade training and performance during an unannounced fire drill during the night shift on January 28, 2025.
71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance
Requalification Examination Results (IP Section 03.03) (1 Sample)
- (1) The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating exams administered February to March 2025.
71111.11B - Licensed Operator Requalification Program and Licensed Operator Performance
Licensed Operator Requalification Program (IP Section 03.04) (1 Sample)
- (1) Biennial Requalification Written Examinations
The inspectors evaluated the quality of the licensed operator biennial requalification written examinations administered February to March 2025.
Annual Requalification Operating Tests
The inspectors evaluated the adequacy of the facility licensees annual requalification operating tests administered February to March 2025.
Administration of an Annual Requalification Operating Test
The inspectors evaluated the effectiveness of the facility licensee in administering requalification operating tests required by 10 CFR 55.59(a)(2) and that the facility licensee is effectively evaluating their licensed operators for mastery of training objectives.
Requalification Examination Security
The inspectors evaluated the ability of the facility licensee to safeguard examination material, such that the examination is not compromised.
Remedial Training and Re-examinations
The inspectors evaluated the effectiveness of remedial training conducted by the licensee, and reviewed the adequacy of re-examinations for licensed operators who did not pass a required requalification examination.
Operator License Conditions
The inspectors evaluated the licensees program for ensuring that licensed operators meet the conditions of their licenses.
Control Room Simulator
The inspectors evaluated the adequacy of the facility licensees control room simulator in modeling the actual plant, and for meeting the requirements contained in 10 CFR 55.46.
71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance
Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01) (1 Sample)
- (1) The inspectors observed and evaluated licensed operator performance in the control room during the Unit 3 down power and single loop operations on March 22, 2025.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated licensed operator requalification training in the simulator on March 4, 2025.
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (2 Samples)
- (1) Unit common, SBO system through February 20, 2025
- (2) Unit 2, high-pressure coolant injection (HPCI) through March 19, 2025
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (5 Samples)
The inspectors evaluated the accuracy and completeness of risk assessments for the following planned and emergent work activities to ensure configuration changes and appropriate work controls were addressed:
- (1) Unit common, restricted plant activities based on electricity power grid conditions due to cold weather demand on January 21 through 23, 2025
- (2) Unit common, E-3 EDG planned maintenance on January 29 and 30, 2025
- (3) Unit 2, 2A RHR loop planned maintenance on February 11 and 12, 2025
- (4) Unit 2, '2A' standby liquid control pump unplanned maintenance on March 11, 2025
- (5) Unit 3, risk informed completion time implementation during '3D' RHR system inoperability on March 26, 2025
71111.15 - Operability Determinations and Functionality Assessments
Operability Determination or Functionality Assessment (IP Section 03.01) (5 Samples)
The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:
- (1) Unit common, SBO switchgear building and battery cell temperatures low on January 22, 2025
- (2) Unit common, diesel generator lube oil inventory verification identified that the documented quantity of stored lube oil was less than required on January 25, 2025
- (3) Unit 2, reactor core isolation cooling trip throttle valve MO-2-13C-4487 did not re-open after being closed on February 5, 2025
- (4) Unit common, 'E-4' EDG opposite control side cylinder number eight jacket coolant leak on February 21, 2025
- (5) Unit 3, '3D' RHR room cooler temporary leak repair on March 27, 2025
71111.24 - Testing and Maintenance of Equipment Important to Risk
The inspectors evaluated the following testing and maintenance activities to verify system operability and/or functionality:
Post-Maintenance Testing (PMT) (IP Section 03.01) (9 Samples)
- (1) Unit 2, 2D RHR pump control valve CV-2-10-2677D limit switch adjustment on January 28, 2025
- (2) Unit common, E-3 EDG planned maintenance on January 28 through February 2, 2025
- (3) Unit 2, 2C RHR heat exchanger performance following 2A RHR loop maintenance on February 12, 2025
- (4) Unit 2, '2A' loop of high-pressure service water following pump repack and valve maintenance on February 12, 2025
- (5) Unit 2, 2A RHR loop pump, valve, and flow testing following 2A RHR loop maintenance on February 12, 2025
- (6) Unit 3, '3B' standby liquid control system piping pressure test following accumulator repair on March 5, 2025
- (7) Unit 2, '2A' standby liquid control pump functional test following discharge relief valve replacement on March 11, 2025
- (8) Unit 2, HPCI pump, valve, flow and unit cooler functional and inservice test following electro-mechanical governor replacement on March 20, 2025
- (9) Unit 2, HPCI lube oil system startup and functional test following HPCI system maintenance on March 20, 2025
Surveillance Testing (IP Section 03.01) (3 Samples)
- (1) Unit common, EDG main fuel tank sampling and analysis on January 23, 2025
- (2) Unit common, E-2 EDG slow start full load on March 7, 2025
- (3) Unit 2, reactor core isolation cooling pump, valve, and flow inservice testing on January 16, 2025
Inservice Testing (IST) (IP Section 03.01) (2 Samples)
- (1) Unit 2, 2B loop RHR pump, valve and flow comprehensive and inservice test on January 27, 2025
- (2) Unit 3, ST-O-011-306-3, '3B' standby liquid control pump functional test for inservice testing on March 5, 2025
71114.02 - Alert and Notification System Testing
Inspection Review (IP Section 02.01-02.04) (1 Sample)
- (1) The inspectors evaluated the licensee's maintenance and testing of the Station Alert and Notification System on February 24 through February 27, 2025, for the period of February 2023 through January 2025.
71114.03 - Emergency Response Organization Staffing and Augmentation System
Inspection Review (IP Section 02.01-02.02) (1 Sample)
- (1) The inspectors evaluated the readiness of the Emergency Preparedness Organization on February 24 through February 27, 2025, for the period of February 2023 through January 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:
1. 24-63, TQ-AA-113, "ERO Training and Qualification," Revision 40
2. 24-57, EP-AA-11, "Operating Stations Emergency Preparedness Process
Description," Revision 11
3. 24-52, EP-MA-121-1002, "Alert and Notification System (ANS) Program,"
Revision 16
4. 24-37, EP-AA-125-1006, "50.54(t) Audit Performance Indicator Guidance,"
Revision 1
5. 24-37, EP-AA-125-1007, "Emergency Response Facility & Equipment
Readiness (ERFER) Indicators Guidance," Revision 1 This evaluation does not constitute NRC approval.
71114.05 - Maintenance of Emergency Preparedness
Inspection Review (IP Section 02.01 - 02.11) (1 Sample)
- (1) The inspectors evaluated the maintenance of the Emergency Preparedness Program on February 24 through February 27, 2025, for the period of February 2023 through January 2025.
71114.06 - Drill Evaluation
Additional Drill and/or Training Evolution (1 Sample)
The inspectors evaluated:
- (1) Operations Out of the Box Evaluation performed on March 4,
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification
The inspectors verified licensee performance indicators submittals listed below:
IE01: Unplanned Scrams per 7000 Critical Hours Sample (IP Section 02.01)===
- (1) Unit 2 for period January 1, 2024 through December 31, 2024
- (2) Unit 3 for period January 1, 2024 through December 31, 2024
IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 02.02) (2 Samples)
- (1) Unit 2 for period January 1, 2024 through December 31, 2024
- (2) Unit 3 for period January 1, 2024 through December 31, 2024
IE04: Unplanned Scrams with Complications (USwC) Sample (IP Section 02.03) (2 Samples)
- (1) Unit 2 for period January 1, 2024 through December 31, 2024
- (2) Unit 3 for period January 1, 2024 through December 31, 2024
EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)
- (1) April 1, 2024 through December 31, 2024
EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13) (1 Sample)
- (1) April 1, 2024 through December 31, 2024
EP04: Emergency Response Facility and Equipment Readiness (ERFER) (IP Section 02.14)
This is a new NRC performance indicator, introduced in Nuclear Energy Institute 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. Therefore, at the time of inspection, there was no quarterly data compiled and submitted to the NRC as of yet. Verifications will take place on later inspections.
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 April 7, 2025, the inspectors presented the integrated inspection results to Martin Bonifanti, Site Vice President, and other members of the licensee staff.
- On February 27, 2025, the inspectors presented the emergency preparedness program inspection results to Ryan Stiltner, Plant Manager, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
Corrective Action
Documents
Resulting from
Inspection
- IR 0488667
Procedures
PF-13D
Unit 3 Reactor Building, 3 'A' & 3 'C' Core Spray Room,
Elevation 91 - 6
Revision 3
PF-78H
Turbine Building Common, Cable Spreading and Computer
Rooms, Elevation 150'-0"
Revision 9
Corrective Action
Documents
04832303
04834868
04839303
Procedures
Diesel Generator Lube Oil Inventory Verification
Revision 16
Procedures
'A' RHR Loop Pump, Valve, Flow and Unit Cooler Functional
and Inservice Test
Revision 55
Work Orders
05584250
561114301
Corrective Action
Documents
04816843
04837011
Miscellaneous
Peach Bottom Atomic Power Station Public ANS Design
Report
Revision 1
Procedures
CFR 50.54(q) Change Evaluation
Revision 11
Miscellaneous
Exelon Nuclear Standardized Radiological Emergency Plan
Revision 33
Exelon Nuclear Radiological Emergency Plan Annex for
Peach Bottom Atomic Power Station
Revision 35
Miscellaneous
Operations Scenario Guide 0786R