IR 05000298/2025012
| ML26021A070 | |
| Person / Time | |
|---|---|
| Site: | Cooper  |
| Issue date: | 01/22/2026 |
| From: | Wes Cullum NRC/RGN-IV/DORS/EB1 |
| To: | Dia K Nebraska Public Power District (NPPD) |
| References | |
| IR 2025012 | |
| Download: ML26021A070 (0) | |
Text
January 22, 2026
SUBJECT:
COOPER NUCLEAR STATION - AGE-RELATED DEGRADATION INSPECTION REPORT 05000298/2025012
Dear Khalil Dia:
On January 8, 2026, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Cooper Nuclear Station and discussed the results of this inspection with you 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, Wes L. Cullum, Chief Engineering Branch 1 Division of Operating Reactor Safety Docket No. 05000298 License No. DPR-46
Enclosure:
As stated
Inspection Report
Docket Number:
05000298
License Number:
Report Number:
Enterprise Identifier:
I-2025-012-0007
Licensee:
Nebraska Public Power District
Facility:
Cooper Nuclear Station
Location:
Brownville, NE
Inspection Dates:
January 5, 2026 to January 8, 2026
Inspectors:
D. Bryen, Reactor Inspector
B. Nwafor, Reactor Inspector
S. Schwind, Senior Reactor Inspector
Approved By:
Wes L. Cullum, Chief
Engineering Branch 1
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a NRC inspection at Cooper Nuclear Station, 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
71111.21N.04 - Age-Related Degradation Age-Related Degradation (4 Samples)
- (1) Diesel generator 2 lube oil system
- (2) Motor control center MCC-LX
- (3) Service water buried piping from the intake structure to the control building
- (4) DGDO-23, Crosstie isolation valve between diesel fuel oil storage tanks
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On January 8, 2026, the inspectors presented the NRC inspection results to Khalil Dia and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
71111.21N.04
Calculations
NEDC
2-019
May 14,
2018
71111.21N.04
Corrective Action
Documents
CR-CNS-
2016-06748, 2023-01453, 2024-02515, 2024-04491,
24-05530, 2025-01749, 2021-00824, 2025-01839,
23-00489, 2020-04457
71111.21N.04
Drawings
454031300
Isometric Key, Circulating Water, Screen Wash & Service
Water Systems, Cooper Nuclear Station
October 28,
24
71111.21N.04
Drawings
KSV46-5
04/04/2005
71111.21N.04
Engineering
Changes
CED 6029681
Modification of Engine Driven Lube Oil Pump (EDLO) 1 &
Discharge Piping
05/21/2009
71111.21N.04
Engineering
Changes
DC86-136
Seismic Restraints for Motor Control Centers at Cooper
Nuclear Station
71111.21N.04
Engineering
Changes
MPCR 10750295
Maintenance Plan Change Request
07/18/2010
71111.21N.04
Miscellaneous
22 Part 14
Condition Monitoring of Rotating Equipment in Nuclear
Power Plants
71111.21N.04
Miscellaneous
800000009552
Valve lubrication PM
71111.21N.04
Miscellaneous
800000027494
Inspection of buried SW piping (Visual and UT).
71111.21N.04
Miscellaneous
Vibration Data
DG2 EDLOP Vibration Point
71111.21N.04
Miscellaneous
Vol 2, Instruction
Manual #111387
KSV Diesel Generator Operations and Maintenance
Manual
71111.21N.04
Procedures
6.SW.102
Service Water System Post-LOCA Flow Verification
Revision 55
71111.21N.04
Procedures
Diesel Generator (DG) System Design Criteria Document
(DCD)
01/14/2016
71111.21N.04
Procedures
Engineering
Procedure 3.4.4
Temporary Configuration Change
71111.21N.04
Work Orders
WO- 5480066, 5522499, 5497887, 5057182, 5173309,
283289, 5464648, 5489654