ML26021A070
| 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 Khalil Dia, Site Vice President Nebraska Public Power District 72676 648A Avenue P.O. Box 98 Brownville, NE 68321
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 cc w/ encl: Distribution via GovDelivery Signed by Cullum, Wes on 01/22/26
SUNSI Review By: SCS
Non-Sensitive
Sensitive
Publicly Available
Non-Publicly Available OFFICE SRI:DORS/EB1 RI:DORS/EB1 RI:DORS/EB1 BC:DORS/EB1 NAME SSchwind DBryen BNwafor WCullum SIGNATURE
/RA/
/RA/
/RA/
/RA/
DATE 01/21/26 01/21/26 01/21/26 01/22/26
Enclosure U.S. NUCLEAR REGULATORY COMMISSION Inspection Report Docket Number:
05000298 License Number:
DPR-46 Report Number:
05000298/2025012 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
2
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.
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 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.
4 DOCUMENTS REVIEWED Inspection Procedure Type Designation Description or Title Revision or Date 71111.21N.04 Calculations NEDC 12-019 May 14, 2018 71111.21N.04 Corrective Action Documents CR-CNS-2016-06748, 2023-01453, 2024-02515, 2024-04491, 2024-05530, 2025-01749, 2021-00824, 2025-01839, 2023-00489, 2020-04457 71111.21N.04 Drawings 454031300 Isometric Key, Circulating Water, Screen Wash & Service Water Systems, Cooper Nuclear Station October 28, 2024 71111.21N.04 Drawings KSV46-5 CNS Lube Oil Schematics 04/04/2005 71111.21N.04 Engineering Changes CED 6029681 Modification of Engine Driven Lube Oil Pump (EDLO) 1 &
2 Discharge Piping 05/21/2009 71111.21N.04 Engineering Changes DC86-136 Seismic Restraints for Motor Control Centers at Cooper Nuclear Station 4
71111.21N.04 Engineering Changes MPCR 10750295 Maintenance Plan Change Request 07/18/2010 71111.21N.04 Miscellaneous ASME OM Code 2022 Part 14 Condition Monitoring of Rotating Equipment in Nuclear Power Plants 71111.21N.04 Miscellaneous PM 800000009552 Valve lubrication PM 71111.21N.04 Miscellaneous PM 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 DG DCD Diesel Generator (DG) System Design Criteria Document (DCD) 01/14/2016 71111.21N.04 Procedures Engineering Procedure 3.4.4 Temporary Configuration Change 22 71111.21N.04 Work Orders WO-5480066, 5522499, 5497887, 5057182, 5173309, 5283289, 5464648, 5489654