ML25345A068
| ML25345A068 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 12/16/2025 |
| From: | John Dixon NRC/RGN-IV/DORS/PBD |
| To: | Pehrson D Entergy Operations |
| References | |
| EA-24-107 IR 2025003 | |
| Download: ML25345A068 (0) | |
Text
December 16, 2025 EA-24-107 Doug Pehrson, Site Vice President Arkansas Nuclear One Entergy Operations, Inc.
N-TSB-58 1448 S.R. 333 Russellville, AR 72802-0967
SUBJECT:
ARKANSAS NUCLEAR ONE - INTEGRATED INSPECTION REPORT 05000313/2025003 AND 05000368/2025003
Dear Doug Pehrson:
On September 30, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Arkansas Nuclear One. On December 4, 2025, the NRC inspectors discussed the results of this inspection with Joshua Toben, Manager of Regulatory Assurance and Emergency Planning, and other members of your staff. The results of this inspection are documented in the enclosed report.
Due to the temporary cessation of government operations, which commenced on October 1, 2025, the NRC began operating under its Office of Management and Budget-approved plan for operations during a lapse in appropriations. Consistent with that plan, the NRC operated at reduced staffing levels throughout the duration of the shutdown. However, the NRC continued to perform critical health and safety functions and make progress on other high-priority activities associated with the ADVANCE Act and Executive Order 14300. On November 13, 2025, following the passage of a continuing resolution, the NRC resumed normal operations. However, due to the 43-day lapse in normal operations, the Office of Nuclear Reactor Regulation granted the Regional Offices an extension on the issuance of the calendar year 2025 inspection reports that should have been issued by November 13, 2025, to December 31, 2025. The NRC resumed the routine cycle of issuing inspection reports on November 13, 2025.
One finding of very low safety significance (Green) is documented in this report. This finding involved a violation of NRC requirements. We are treating this violation as a non-cited violation (NCV) consistent with Section 2.3.2 of the Enforcement Policy.
D. Pehrson 2
If you contest the violation or the significance or severity of the violation documented in this inspection report, you should provide a response within 30 days of the date of this inspection report, with the basis for your denial, to the U.S. Nuclear Regulatory Commission, ATTN:
Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region IV; the Director, Office of Enforcement; and the NRC Resident Inspector at Arkansas Nuclear One.
If you disagree with a cross-cutting aspect assignment in this report, you should provide a response within 30 days of the date of this inspection report, with the basis for your disagreement, to the U.S. Nuclear Regulatory Commission, ATTN: Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region IV; and the NRC Resident Inspector at Arkansas Nuclear One.
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, John L. Dixon, Jr., Chief Reactor Projects Branch D Division of Operating Reactor Safety Docket Nos. 05000313 and 05000368 License Nos. DPR-51 and NPF-6
Enclosure:
As stated cc w/ encl: Distribution via LISTSERV Signed by Dixon, John on 12/16/25
Non-Sensitive
Sensitive
Publicly Available
Non-Publicly Available OFFICE SRI:DORS/PBD RI:DORS/PBD RI:DORS/PBD SPE:DORS/PBD BC:DORS/PBD NAME BTindell ETinger MMondou ASanchez JDixon SIGNATURE
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DATE 12/12/25 12/11/25 12/11/25 12/15/25 12/16/25
Enclosure U.S. NUCLEAR REGULATORY COMMISSION Inspection Report Docket Numbers:
05000313 and 05000368 License Numbers:
DPR-51 and NPF-6 Report Numbers:
05000313/2025003 and 05000368/2025003 Enterprise Identifier:
I-2025-003-0002 Licensee:
Entergy Operations, Inc.
Facility:
Arkansas Nuclear One Location:
Russellville, AR Inspection Dates:
July 1, 2025, to September 30, 2025 Inspectors:
T. Farina, Senior Operations Engineer J. Kirkland, Senior Operations Engineer M. Mondou, Resident Inspector L. Moore, Emergency Preparedness Inspector B. Tindell, Senior Resident Inspector E. Tinger, Resident Inspector Approved By:
John L. Dixon, Jr., Chief Reactor Projects Branch D Division of Operating Reactor Safety
2
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Arkansas Nuclear One, 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 Failure to Establish an Adequate Procedure for Diesel Fire Pump Maintenance Cornerstone Significance Cross-Cutting Aspect Report Section Mitigating Systems Green NCV 05000313,05000368/2025003-01 Open/Closed
[H.12] - Avoid Complacency 71152A A self-revealed Green finding and associated non-cited violation of Unit 1 License Condition 2.C.(8) and Unit 2 License Condition 2.C.(3)(b) was identified when the licensee failed to establish an adequate procedure for maintenance of the diesel fire pump.
Specifically, on January 7, 2025, April 4, 2025, and May 14, 2025, the starter motor for the diesel fire pump was installed without a spacer and subsequently failed to start the diesel fire pump. This occurred because Procedure OP-1307.004, Diesel Fire Pump Engine (K-5)
Biannual Surveillance, Revision 16, provided no instructions regarding the starter motor spacer.
Additional Tracking Items Type Issue Number Title Report Section Status NOV 05000313/2024090-01 SLIII NOV for ANO Unit 1, Internet Usage while ATC EA-24-107 71111.11B Closed LER 05000313, 05000368/
2025-S001-00 Follow-up Report for a 10 CFR 73 Security Report on January 31, 2025 71153 Closed
3 PLANT STATUS Unit 1 began a coastdown for refueling outage 1R32 on September 15, 2025. On September 24, 2025, Unit 1 tripped due to a B main phase transformer fault. Unit 1 was restarted on September 28, 2025, and ended the inspection period at approximately 60 percent power.
Unit 2 began the inspection period at full power and remained there for the duration 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 71111.04 - Equipment Alignment Partial Walkdown Sample (IP Section 03.01) (3 Samples)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
(1)
Unit 2, low-pressure safety injection system train B following maintenance on the low-pressure safety injection pump seal cooler, on July 31, 2025 (2)
Units 1 and 2, control room boundary and control room emergency ventilation system during boundary breach with administrative controls, on August 5, 2025 (3)
Unit 1, high-pressure injection system trains A and C following weekly pump swap, on August 25, 2025 Complete Walkdown Sample (IP Section 03.02) (1 Sample)
(1)
The inspectors evaluated system configurations during a complete walkdown of the Unit 1 service water system, on July 28, 2025.
4 71111.05 - Fire Protection Fire Area Walkdown and Inspection Sample (IP Section 03.01) (3 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 2, diesel generator room access corridor, fire area JJ, due to safety-related equipment in the area, on August 4, 2025 (2)
Unit 2, control element drive mechanism equipment room, fire area B-4, due to safety-related equipment in the area, on August 8, 2025 (3)
Unit 1, diesel generator access corridor 98, fire area I-1, due to safety-related equipment in the area, on August 12, 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 announced fire drill in the Unit 2 hot tool room, on September 5, 2025.
71111.06 - Flood Protection Measures Flooding Sample (IP Section 03.01) (1 Sample)
(1)
The inspectors evaluated internal flooding mitigation protections in the Unit 1 turbine building due to a postulated pipe break in auxiliary cooling water that could fail both trains of safety-related service water, on August 1, 2025.
71111.07A - Heat Exchanger/Sink Performance Annual Review (IP Section 03.01) (1 Sample)
The inspectors evaluated readiness and performance of:
(1)
Unit 1, emergency diesel generator train B jacket water heat exchanger, on July 11, 2025 71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance Requalification Examination Results (IP Section 03.03) (2 Samples)
(1)
The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating test and biennial written examinations on July 29, 2025.
(2)
The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating exam administered on August 13, 2025.
5 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 examination administered on July 3, 2025.
Annual Requalification Operating Tests The inspectors evaluated the adequacy of the licensees annual requalification operating test.
Administration of an Annual Requalification Operating Test The inspectors evaluated the effectiveness of the licensee in administering requalification operating tests required by 10 CFR 55.59(a)(2) and that the licensee is effectively evaluating their licensed operators for mastery of training objectives.
Requalification Examination Security The inspectors evaluated the ability of the 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 licensees control room simulator in modeling the actual plant, and for meeting the requirements contained in 10 CFR 55.46.
Problem Identification and Resolution The inspectors evaluated the licensee's program for identifying and resolving problems related to licensed operator training and performance, to include reviewing the licensee's corrective actions for SL III NOV 05000313/2024090-01 (ADAMS Accession No. ML24346A037), Internet Usage while ATC, EA-24-107.
6 71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01)
(2 Samples)
(1)
The inspectors observed and evaluated licensed operator performance in the control room during Unit 1 turbine-driven emergency feedwater pump comprehensive surveillance testing, on July 30, 2025.
(2)
The inspectors observed and evaluated licensed operator performance in the control room during Unit 2 high-pressure safety injection valve stroking and control room ventilation surveillance testing, on September 4, 2025.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (2 Samples)
(1)
The inspectors observed and evaluated Unit 1 annual requalification exam simulator activities, on July 23, 2025.
(2)
The inspectors observed and evaluated Unit 2 annual requalification exam simulator activities, on July 23, 2025.
71111.12 - Maintenance Effectiveness Maintenance Effectiveness (IP Section 03.01) (3 Samples)
The inspectors evaluated the effectiveness of maintenance to ensure the following structures, systems, and components (SSCs) remain capable of performing their intended function:
(1)
Unit 2, component cooling water system, on July 11, 2025 (2)
Unit 1, reactor protection system following a failure of a DC power supply, on August 7, 2025 (3)
Unit 1, high-pressure injection system following replacement high-pressure injection pump A bearing failure, on August 29, 2025 71111.15 - Operability Determinations and Functionality Assessments Operability Determination or Functionality Assessment (IP Section 03.01) (4 Samples)
The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:
(1)
Unit 2, emergency safeguards features train B operability determination due to service water leak from vault room cooling coil 2VUC-1D, on July 28, 2025 (2)
Unit 1, vital battery charger D-03B operability determination due to trip of output breaker, on August 13, 2025 (3)
Unit 1, emergency diesel generator train B operability determination due to governor solenoid failure on emergency diesel generator train A, on September 4, 2025 (4)
Unit 2, low-pressure safety injection pump A operability determination due to seismic concerns from a loose metal support, on September 10, 2025
7 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) (4 Samples)
(1)
Units 1 and 2, alternate ac diesel generator test after engine, breaker, and controls maintenance, on August 4, 2025 (2)
Unit 2, high-pressure safety injection pump C breaker protective relay tests following calibration, on August 11, 2025 (3)
Unit 2, high-pressure safety injection pump C breaker test after removal and replacement, on September 11, 2025 (4)
Unit 2, high-pressure safety injection pump A test after injection valve preventive maintenance, on September 12, 2025 Surveillance Testing (IP Section 03.01) (1 Sample)
(1)
Unit 2, plant protection system channel D matrix surveillance test, on August 19, 2025 Inservice Testing (IST) (IP Section 03.01) (1 Sample)
(1)
Unit 2, charging pump A inservice test, on August 18, 2025 71114.02 - Alert and Notification System Testing Inspection Review (IP Section 02.01-02.04) (1 Sample)
(1)
The inspectors evaluated the maintenance and testing of the alert and notification system between September 1, 2023 - July 28, 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 between September 1, 2023 - July 28, 2025. Inspectors also evaluated the licensee's ability to staff the emergency response facilities in accordance with emergency plan commitments.
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.
OP-1903.010, Emergency Action Level Classification, Revision 62, 63, 64 OP-1904.002, Offsite Dose Projections, Revision 52 OP1903.010-U1WC, Emergency Action Level Classification U1 Wall Chart, Revision 3 OP1903.010-U2WC, Emergency Action Level Classification U2 Wall Chart, Revision 2
8 In addition, the inspectors evaluated the 10 CFR 50.54(q) emergency plan change process and practices between September 1, 2023 - July 28, 2025. The evaluations reviewed screenings and evaluations documenting implementation of the process.
The reviews of the change process documentation or the emergency plan changes do 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 between September 1, 2023 - July 28, 2025. The evaluation reviewed evidence of completing various emergency plan commitments, the conduct of drills and exercises, licensee audits and assessments, and the maintenance of equipment important to emergency preparedness.
71114.06 - Drill Evaluation Additional Drill and/or Training Evolution (1 Sample)
The inspectors evaluated:
(1)
Unit 2, emergency preparedness drill for loss of all feedwater, failed fuel, and containment isolation valve leak, on July 31, 2025 OTHER ACTIVITIES - BASELINE 71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
MS06: Emergency AC Power Systems (IP Section 02.05) (2 Samples)
(1)
Unit 1 (July 1, 2024, through June 30, 2025)
(2)
Unit 2 (July 1, 2024, through June 30, 2025)
MS07: High Pressure Injection Systems (IP Section 02.06) (2 Samples)
(1)
Unit 1 (July 1, 2024, through June 30, 2025)
(2)
Unit 2 (July 1, 2024, through June 30, 2025)
MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)
(1)
Unit 1 (July 1, 2024, through June 30, 2025)
(2)
Unit 2 (July 1, 2024, through June 30, 2025)
EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)
(1)
July 1, 2024, through June 30, 2025
9 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13)
(1 Sample)
(1)
July 1, 2024, through June 30, 2025 EP04: Emergency Response Facility and Equipment Readiness (ERFER) (IP Section 02.14)
(1 Sample)
(1)
January 1, 2025, through June 30, 2025 71152A - Annual Follow-up Problem Identification and Resolution Annual Follow-up of Selected Issues (Section 03.03) (1 Sample)
The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:
(1)
Units 1 and 2, effectiveness of corrective actions relating to the diesel-driven fire pump repeated failure to start, on August 5, 2025 71152S - Semiannual Trend Problem Identification and Resolution Semiannual Trend Review (Section 03.02) (1 Sample)
(1)
The inspectors reviewed the licensees corrective action program to identify potential adverse trends that might be indicative of a more significant safety issue. The inspectors performed an in-depth review of the licensees ability to identify procedure quality issues, evaluate each occurrence, and implement corrective actions. The inspectors determined evidence of an emerging trend in this area, informed the licensee of this trend, and documented an observation in the Inspection Results section of this report. No issues of more than minor significance were identified.
71153 - Follow-Up of Events and Notices of Enforcement Discretion Event Report (IP Section 03.02) (1 Sample)
The inspectors evaluated the following licensee event reports (LERs) which can be accessed at https://lersearch.inl.gov/LERSearchCriteria.aspx:
(1)
LER 05000313,05000368/2025-S001-00, Follow-up Report for a 10 CFR 73 Security Report on January 31, 2025, (ML25091A100). The inspection conclusions associated with this LER are documented as a minor violation in the Inspection Results section of this report. This LER is Closed.
Personnel Performance (IP Section 03.03) (1 Sample)
(1)
The inspectors evaluated the Unit 1 reactor trip event, including operator and equipment performance, on September 24, 2025.
10 INSPECTION RESULTS Failure to Establish an Adequate Procedure for Diesel Fire Pump Maintenance Cornerstone Significance Cross-Cutting Aspect Report Section Mitigating Systems Green NCV 05000313,05000368/2025003-01 Open/Closed
[H.12] - Avoid Complacency 71152A A self-revealed Green finding and associated non-cited violation of Unit 1 License Condition 2.C.(8) and Unit 2 License Condition 2.C.(3)(b) was identified when the licensee failed to establish an adequate procedure for maintenance of the diesel fire pump.
Specifically, on January 7, 2025, April 4, 2025, and May 14, 2025, the starter motor for the diesel fire pump was installed without a spacer and subsequently failed to start the diesel fire pump. This occurred because Procedure OP-1307.004, Diesel Fire Pump Engine (K-5)
Biannual Surveillance, Revision 16, provided no instructions regarding the starter motor spacer.
==
Description:==
On January 7, 2025, the diesel fire pump starter motor was replaced. The starter spacer was inadvertently removed along with the starter. The replacement starter was installed in accordance with Procedure OP-1307.004, Diesel Fire Pump Engine (K-5)
Biannual Surveillance, Revision 16. However, the starter spacer was not installed with the starter because the procedure did not direct installation of the spacer; this information is available from the diesel engine technical manual, TDC742 0080 1, Operation and Maintenance Manual for Cummins C Series Engines, Revision 2. The diesel fire pump passed subsequent tests until April 4, 2025, when it failed to start. The starter was replaced using the same procedure, again without the spacer, and the diesel fire pump passed testing.
During the next surveillance test on May 8, 2025, the diesel fire pump failed to start.
Following replacement of the starter, again without the spacer, the diesel fire pump failed to start on May 14, 2025. After a review of the removed starters, the licensee identified the starter spacer on the starter removed on January 7, 2025, and installed the starter spacer on the diesel fire pump with a new starter. The diesel fire pump passed subsequent testing. The inspectors noted that the electric fire pump, which can fully supply water to the fire suppression system for Unit 1 and Unit 2, was available during these times of unavailability of the diesel fire pump.
Corrective Actions: The licensee installed the starter spacer on the starter and revised the procedure to install/remove the starter to include installation of the spacer.
Corrective Action References: Condition Reports CR-ANO-1-2025-00016, CR-ANO-C-2025-00584, CR-ANO-1-2025-00670, CR-ANO-1-2025-00696 Performance Assessment:
Performance Deficiency: The licensees failure to establish an adequate procedure for the maintenance of the diesel fire pump in accordance with the Unit 1 and Unit 2 fire protection license conditions was a performance deficiency. Specifically, Procedure OP-1307.004, Diesel Fire Pump Engine (K-5) Biannual Surveillance, Revision 16, did not include instructions for installing the starter motor spacer. This led to the starter motor being installed without the spacer on January 7, April 4, and May 14, 2025, and resulted in repeated failures of the diesel fire pump to start, which should have been prevented. The cause of the issue of concern was reasonably within the licensee's ability to foresee and correct because the licensee did not include information available from the diesel engine technical
11 manual TDC742 0080 1, Operation and Maintenance Manual for Cummins C Series Engines, Revision 2, in the procedure.
Screening: The inspectors determined the performance deficiency was more than minor because it was associated with the Protection Against External Factors attribute of the Mitigating Systems cornerstone and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the inspectors determined the reliability of the diesel fire pump, which responds to potential fire events to prevent fire damage of equipment important for safe shutdown, was adversely affected due to the multiple failures.
Significance: The inspectors assessed the significance of the finding using IMC 0609 Appendix F, Fire Protection and Post - Fire Safe Shutdown SDP. Using IMC 0609 Appendix F, Attachment 1, Fire Protection Significance Determination Process Worksheets, revised January 1, 2025, the inspectors assigned the finding category of Fire Water Supply.
The inspectors determined that the finding was of very low safety significance (Green) because adequate fire water capacity would still be available from the permanent electric fire pump for protection of equipment important to safe shutdown in the most limiting location onsite.
Cross-Cutting Aspect: H.12 - Avoid Complacency: Individuals recognize and plan for the possibility of mistakes, latent issues, and inherent risk, even while expecting successful outcomes. Individuals implement appropriate error reduction tools. Specifically, the licensee failed to recognize the difference between removed and installed components and failed to use vendor documentation, which is referenced in the procedure, after repeated failures. This resulted in delayed effective corrective actions and repeated failures of the diesel fire pump to start.
Enforcement:
Violation: Arkansas Nuclear One, Unit 1 License Condition 2.C.(8) states, in part, the licensee shall implement and maintain in effect all provisions of the approved fire protection program that comply with 10 CFR 50.48(a) and 10 CFR 50.48(c), as specified in the license amendment request dated January 29, 2014. The license amendment request dated January 29, 2014, Attachment A, Section 3.2.3, Procedures (1), states, in part, procedures are established for inspection, testing, and maintenance of fire protection systems.
Arkansas Nuclear One, Unit 2 License Condition 2.C.(3)(b) states, in part, the licensee shall implement and maintain in effect all provisions of the approved fire protection program that comply with 10 CFR 50.48(a) and 10 CFR 50.48(c), as specified in the license amendment request dated December 17, 2012. The license amendment request dated December 17, 2012, Attachment A, Section 3.2.3, Procedures (1), states, in part, procedures are established for inspection, testing, and maintenance of fire protection systems.
Procedure OP-1307.004, Diesel Fire Pump Engine (K-5) Biannual Surveillance, revision 16, is one such procedure that the licensee uses to establish for inspection, testing, and maintenance of fire protection systems.
Contrary to the above, prior to July 15, 2025, the licensee failed to maintain in effect all provisions of the approved fire protection program, as specified in the license amendment request dated January 29, 2014, for Unit 1, and December 17, 2012, for Unit 2 by not having
12 adequate procedures for maintenance of fire protection systems. Specifically, on January 7, April 4, and May 14, 2025, the starter motor for the diesel fire pump was installed without a required spacer because the inspection, testing, and maintenance procedure OP-1307.004, Diesel Fire Pump Engine (K-5) Biannual Surveillance, revision 16, failed to direct installation of the starter motor spacer. Subsequently, the diesel fire pump failed to start multiple times due to the missing spacer.
Enforcement Action: This violation is being treated as a non-cited violation, consistent with Section 2.3.2 of the Enforcement Policy.
Observation: Negative Trend in Prioritizing and Addressing Procedure Improvements 71152S The inspectors performed a review of the licensees Procedure Improvement Form (PIF) database with a focus on procedure improvements that did not rise to the level of tracking in the corrective action program. Procedural improvements prevent human errors that could adversely impact safety.
The inspectors noted that the licensees guidance for procedure revisions, OP-1000.006, Procedure Control, Revision 76, Step 6.3.6 states, in part, that procedure improvements will generally be completed within a year. However, the inspectors counted the following open PIFs: 1 from 2016, 51 from 2018, 47 from 2019, 91 from 2020, 136 from 2021, 209 from 2022, and 336 from 2023. The inspector counted a total of 871 PIFs open for more than a year.
The inspectors notified the licensee about the lack of prioritization and timely procedure revisions. The licensee documented the observations in Condition Report CR-ANO-C-2025-00861. Once the inspectors notified the licensee about the number of open PIFs, the licensee subsequently determined that many of the procedure improvement forms had been incorporated into procedures, but the forms had not been closed. However, the inspectors identified other examples of PIFs that should have been prioritized and incorporated into procedures earlier. The licensee initiated actions to prioritize and close PIFs in a timely manner.
See the minor violation documented in this report associated with this observation.
Minor Violation 71152S Minor Violation: For a description of the issue, see the Observation in this Inspection Report titled Negative Trend in Prioritizing and Addressing Procedure Improvements.
Screening: The inspectors determined that this violation was minor because there was not a human error within the last 3 years that was caused in part by lack of PIF processing. In addition, the inspectors did not find any open PIFs that would most likely lead to a human error that would adversely impact the cornerstones found in IMC 0612 Appendix B, Issue Screening Directions, dated May 28, 2025. The licensee has taken actions to restore compliance, as detailed in the Observation.
13 Enforcement: Unit 1 Technical Specification 5.4.1.a requires, in part, written procedures shall be established, implemented, and maintained covering the applicable procedures recommended in Regulatory Guide 1.33, Revision 2, Appendix A, February 1978. Unit 2 Technical Specification 6.4.1.a requires, in part, written procedures shall be established, implemented, and maintained covering the applicable procedures recommended in Regulatory Guide 1.33, Revision 2, Appendix A, February 1978. Regulatory Guide 1.33, Revision 2, Appendix A, February 1978, Section 1.a, recommends Procedure Review and Approval. Procedure OP-1000.006, Procedure Control, Revision 76, Step 6.3.6, states, in part, if a PIF is written, to determine the PIF priority. The step gives guidance to close the forms in a timely manner, depending on their priority; PIFs should typically be closed in less than 1 year. Procedure OP-1000.006, Step 6.6, states that when a procedure is revised, then initiate action to close out the PIF. Contrary to the above, the licensee failed to implement the procedure review and approval procedure required by technical specifications in Regulatory Guide 1.33. Specifically, the licensee failed to determine PIF priority for most PIFs and failed to close most PIFs within 1 year. The licensee also failed to initiate action to close out the PIFs when the procedures were revised.
The licensee has taken actions to restore compliance. This failure to comply with technical specifications constitutes a minor violation that is not subject to enforcement action in accordance with the NRCs Enforcement Policy.
Minor Violation 71153 Minor Violation: The inspector reviewed LER 05000313, 05000368/2025-S001-00 (ML25091A100) dated April 1, 2025, regarding an actual entry of unauthorized personnel into the protected area (PA). In this LER, the licensee reported that three employees had retained their unescorted access to the site despite having expired plant access training. This training covers individual fitness-for-duty (FFD) and behavior observation program (BOP) responsibilities and must be completed on a nominal 12-month frequency for individuals maintaining unescorted access to the PA.
Of the three individuals, two made entries into the licensees PA unescorted without meeting all the requirements for maintaining unescorted access. The licensee reported this as an actual entry of unauthorized personnel into the PA. The inspector determined that the individuals had received initial FFD and BOP training and were still subject to other required elements of the licensees access authorization program that provide assurance of trustworthiness and reliability.
Title 10 CFR 73.56(f)(2)(ii) states, in part, Behavioral observation training must be:
(C) Maintained in a current status during any period of time an individual possesses unescorted access or unescorted access authorization in accordance with paragraph (f)(2)(iv) of this section.
Title 10 CFR 73.56(f)(2)(iv) states, in part, Individuals shall complete refresher training on a nominal 12-month frequency, or more frequently where the need is indicated.
Contrary to the above, from November 29, 2024, to February 6, 2025, the licensee failed to ensure that behavioral observation training was maintained in a current status during any period of time an individual possesses unescorted access or unescorted access authorization. Specifically, three individuals with unescorted access to Arkansas Nuclear One were allowed to retain their access to the site despite having expired training. These
14 individuals failed to complete behavior observation refresher training within a nominal 12-month frequency. Two of the individuals made entry into the sites protected area.
Screening: The inspectors determined the performance deficiency was minor. The inspector determined the performance deficiency was minor because it could not be viewed as a precursor to a significant event, would not have the potential to lead to a more significant safety concern if left uncorrected, and did not adversely affect the security cornerstone objective.
Enforcement: This failure to comply with 10 CFR 73.56(f)(2)(ii) constitutes a minor violation that is not subject to enforcement action in accordance with the NRCs Enforcement Policy.
EXIT MEETINGS AND DEBRIEFS The inspectors verified no proprietary information was retained or documented in this report.
On July 10, 2025, the inspectors presented the biennial requalification inspection results to Joey Fields, Operations Training Superintendent, and other members of the licensee staff.
On July 29, 2025, the inspectors presented the requalification examination inspection results to Chris Norwood, Regulatory Exam Author, and other members of the licensee staff.
On August 7, 2025, the inspectors presented the emergency preparedness program inspection results to Doug Pehrson, Site Vice President, and other members of the licensee staff.
On December 4, 2025, the inspectors presented the integrated inspection results to Joshua Toben, Manager of Regulatory Assurance and Emergency Planning, and other members of the licensee staff.
15 DOCUMENTS REVIEWED Inspection Procedure Type Designation Description or Title Revision or Date 71111.04 Drawings M-210, Sheet 1 Piping and Instrument Diagram Service Water 155 71111.04 Drawings M-2232, Sheet 1 Piping and Instrument Diagram Safety Injection System 123 71111.04 Drawings M-2263 Piping and Instrument Diagram Units 1 and 2 Control and Computer Rooms HVAC 80 71111.04 Drawings M-231, Sheet 1 Piping and Instrument Diagram Makeup and Purification System 116 71111.04 Procedures OP-1104.002 Makeup and Purification System Operation 105 71111.04 Procedures OP-1104.029 Service Water and Auxiliary Cooling System 130 71111.04 Procedures OP-2104.040 LPSI System Operations 82 71111.04 Procedures OP-2104,007 Control Room Emergency Air Conditioning and Ventilation 88 71111.04 Work Orders WO 555146, 54105036 71111.05 Drawings FP-2104 Fire Zone Ground Floor Plan EL 354-0 41 71111.05 Engineering Evaluations PSA-ANO1 FQ ANO-1 Fire PRA Integration and Quantification 0
71111.05 Engineering Evaluations PSA-ANO2-03 Arkansas Nuclear One Unit 2 Fire Probabilistic Risk Assessment Summary Report 1
71111.05 Procedures EN-DC-161 Control of Combustibles 28 71111.05 Procedures EN-OP-125 Fire Brigade Drills 0
71111.05 Procedures PFP-U1 Unit 1 Prefire Plans 23 71111.05 Procedures PFP-U2 Unit 2 Prefire Plans 19 71111.06 Engineering Changes LCP-94-5022 Service Water System Crossover Valves Logic and Fire Protection 0
71111.06 Miscellaneous PSA-ANO1-01-IF-AS ANO-1 PRA - Internal Flooding Accident Sequence Analysis 2
71111.06 Procedures OP-1203.030 Loss of Service Water 30 71111.06 Procedures OP-1203.054 Internal Flooding 5
71111.07A Procedures EN-DC-316 Heat Exchanger Performance and Condition Monitoring 13 71111.07A Procedures SEP-HX-ANO-001 Arkansas Nuclear One (ANO) Heat Exchanger Program 5
71111.07A Work Orders WO 52779637, 52998309 71111.11A Miscellaneous IP 71111.11 Table 3.03-1 Examination Results 08/13/2025
16 Inspection Procedure Type Designation Description or Title Revision or Date 71111.11A Miscellaneous IP 71111.11, Table 3.03-1 Examination Results 07/29/2025 71111.11B Corrective Action Documents CR-ANO-1-2024-02133, 2-2024-01027, C-2024-00129, C-2024-02132, C-2025-00109 71111.11B Miscellaneous ANO1-OT-04 Simulator Transient Test B3.2.1(4) - Simultaneous Trip of all RCPs 06/13/2024 71111.11B Miscellaneous ANO1-PEST 01 Simulator Post Event Test - RCP Loss Runback Without RCP Trip 01/21/2024 71111.11B Miscellaneous 2025 Operating Test - Week 4 06/30/2025 71111.11B Miscellaneous 2025 Operating Test - Week 5 07/07/2025 71111.11B Miscellaneous 2025 Scenario Malfunction Cross Check 1
71111.11B Miscellaneous 2025 JPM Overlap Tracker 07/07/2025 71111.11B Miscellaneous ANO-1 Open Simulator Differences 02/7/2025 71111.11B Miscellaneous ANO1 Turbine Control System Simulator Acceptance Testing 71111.11B Miscellaneous Credit for Standing Watch Report 03/31/2025 71111.11B Miscellaneous Week 4 RO-SRO Written Examination 06/30/2025 71111.11B Miscellaneous Written Exam Development Tracker N/A 71111.11B Miscellaneous TQF-202-SRB SRB Simulator Review Board (SRB) Meeting Minutes 06/24/2024 71111.11B Procedures ANO1-SST Simulator Steady State Test B3.1 06/20/2024 71111.11B Procedures ANSI/ANS-3.4-1983 Medical Certification and Monitoring of Personnel Requiring Operator Licenses for Nuclear Power Plants 04/29/1983 71111.11B Procedures DG-TRNA-015-EXAMSEC Simulator Exam Security Guidelines 28 71111.11B Procedures EN-OP-115-02 Control Room Conduct and Access Control 7
71111.11B Procedures EN-OP-115-06 Activation and Deactivation of Licenses, and Maintaining Active License Status 4
71111.11B Procedures EN-TQ-201 Systematic Approach to Training Process 28 71111.11B Procedures EN-TQ-202 Simulator Configuration Control 12 71111.11B Procedures EN-TQ-210 Conduct of Simulator Training 18 71111.11B Procedures EN-TQ-218 Licensed Operator Requalification Annual and Biennial Exam Development 0
71111.11Q Miscellaneous SES-1-013 Unit 1 Dynamic Exam Scenario 13
17 Inspection Procedure Type Designation Description or Title Revision or Date 71111.11Q Miscellaneous SES-1-047 Unit 1 Dynamic Exam Scenario 5
71111.11Q Miscellaneous SES-2-026 Unit 2 Dynamic Exam Scenario 11 71111.11Q Miscellaneous SES-2-030 Unit 2 Dynamic Exam Scenario 6
71111.11Q Procedures OP-1106.006 Emergency Feedwater Pump Operation 122 71111.11Q Procedures OP-2104.007 Control Room Emergency Air Conditioning and Ventilation 88 71111.11Q Procedures OP-2104.039 HPSI System Operation 96 71111.11Q Work Orders WO 54107904, 54275875, 54283034 71111.12 Corrective Action Documents CR-ANO-1-2025-00665, 1-2025-00943, 1-2025-01024, 1-2025-01055, 2-2024-00504, 2-2024-02241 71111.12 Procedures OP-1105.001 NI & RPS Operating Procedure 37 71111.12 Procedures OP-2104.028 Component Cooling Water System Operations 53 71111.12 Procedures OP-2203.012-L Annunciator 2K12 Corrective Action 56 71111.12 Procedures OP-2203.016 Excess RCS Leakage 25 71111.12 Procedures OP-2203.025 RCP Emergencies 21 71111.12 Work Orders WO 54298267 71111.15 Corrective Action Documents CR-ANO-1-2025-01040, 1-2025-01157, 1-2025-01229, 2-2002-01748, 2-2025-00747, 2-2025-01227 71111.15 Engineering Changes EC-54279869 2VUC-1D Cooling Coil Mechanical Clamp ASME Section XI Code Repair TMOD 0
71111.15 Miscellaneous TDE147.0640 Installation and Operation Manual for Shutdown Solenoid for UG Governor 0
71111.15 Procedures EN-CS-S-056-A Review of Potentially Hazardous Seismic Category II/I Situations 0
71111.15 Work Orders WO 54106845, 54273622 71111.24 Corrective Action Documents CR-ANO-2-2025-00279, 2-2025-01278 71111.24 Procedures OP-1416.041 Magne-Blast Circuit Breaker Overhaul 32 71111.24 Procedures OP-1416.052 Unit 1 & 2 IAC66K Relay Test Instructions 9
71111.24 Procedures OP-2104.002 Chemical and Volume Control 99 71111.24 Procedures OP-2104.039 HPSI System Operation 96 71111.24 Procedures OP-2304.040 Unit 2 Plant Protection System Channel D Test 51 71111.24 Procedures OP-2411.066 Charging Pump Dampener Bladder 2M-115A, B, C and 2M-116A, B, C Charging, Checking and Depressurization 6
18 Inspection Procedure Type Designation Description or Title Revision or Date 71111.24 Work Orders WO 53024752, 54050458, 54077626, 54120201, 54159480, 54264720, 54279261 71114.02 Miscellaneous Siren Maintenance Checklist 2023_1 71114.02 Miscellaneous Siren Maintenance Checklist 2023_2 71114.02 Miscellaneous Siren Maintenance Checklist - 2023_3 71114.02 Miscellaneous Siren Maintenance Checklist - 2024_1 71114.02 Miscellaneous Siren Maintenance Checklist - 2024_2 71114.02 Miscellaneous Siren Maintenance Checklist - 2024_3 71114.02 Miscellaneous Monthly Siren Test Records - January 2024 - July 2025 71114.02 Miscellaneous 2025 EIB Locations 71114.02 Miscellaneous Emergency Instructions Booklet Arkansas Nuclear One -
English Version 71114.02 Miscellaneous Arkansas Nuclear One - Alert and Notification Design Report 71114.02 Miscellaneous Form 1903.004-K 2023 Alert and Notification System Oversight Activity 10/30/2023 71114.02 Miscellaneous Form 1903.004-K 2024 Alert and Notification System Oversight Activity 11/14/2024 71114.02 Procedures OP-1903.004 Alert and Notification System (ANS) Monitoring Requirements 39 71114.03 Miscellaneous Emergency Response Organization Roster 09/28/2023 71114.03 Miscellaneous Emergency Response Organization Roster 12/31/2023 71114.03 Miscellaneous Emergency Response Organization Roster 03/28/2024 71114.03 Miscellaneous Emergency Response Organization Roster 06/27/2024 Emergency Response Organization Roster 09/30/2024 71114.03 Miscellaneous Emergency Response Organization Roster 12/28/2024 71114.03 Miscellaneous Emergency Response Organization Roster 03/31/2025 71114.03 Miscellaneous Emergency Response Organization Roster 06/30/2025 71114.03 Miscellaneous Form 1903.062C Emergency Response Staffing Drill -
- 3rd Quarter 2023
- 4th Quarter 2023
- 1st Quarter 2024
- 2nd Quarter 2024
- 3rd Quarter 2024
- 4th Quarter 2024
- 1st Quarter 2025
- 2nd Quarter 2025
19 Inspection Procedure Type Designation Description or Title Revision or Date 71114.03 Procedures EN-EP-306 Drills and Exercises 11 71114.03 Procedures EN-EP-310 Emergency Response Organization Notification System 11 71114.03 Procedures EN-EP-603 Emergency Notifications 1
71114.03 Procedures EN-EP-801 Emergency Response Organization 18 71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010 62 71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010 63 71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010 64 71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010-U1WC 2
71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010-U1WC 3
71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010-U2WC 1
71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - OP-1903.010-U2WC 2
71114.04 Miscellaneous 10 CFR 50.54(Q) Screening - OP-1903.011-Z 51 71114.04 Miscellaneous 10 CFR 50.54(Q) Screening - OP-1903.060 48 71114.04 Miscellaneous 10 CFR 50.54(Q) Screening - OP-1903.068 23 71114.04 Miscellaneous 10 CFR 50.54(Q) Screening - OP-1903.079 1
71114.04 Miscellaneous 10 CFR 50.54(Q) Evaluation - 1904.002 52 71114.04 Miscellaneous 10 CFR 50.54(Q) Screening - 1903.011-Y 54 71114.04 Procedures EN-EP-305 Emergency Planning 10 CFR 50.54(q) Review Program 8
71114.05 Corrective Action Documents CR-ANO-C-2024-00607, C-2024-01425, C-2024-01742, C-2024-01824, C-2024-01917, C-2024-02124, C-2024-02129, C-2025-00214, C-2025-00667, C-2025-00916, C-2025-00946, C-2025-00966, C-2025-00967, C-2025-00968 71114.05 Miscellaneous ANO 2023 Environmental (Radiological Monitoring) 09/05/2023 71114.05 Miscellaneous 2023 Onsite Medical Drill 11/08/2023 71114.05 Miscellaneous ANO 2024 Yellow Team 1st Quarter PI Drill 01/18/2024 71114.05 Miscellaneous Emergency Response Staffing Drill 3rd Quarter 2024 71114.05 Miscellaneous SM/STA DEP Tabletop Drill 2 Rob King 08/21/2024 71114.05 Miscellaneous Shantz Hooper IC Drill 08/14/2024 71114.05 Miscellaneous 2024 Onsite Medical Drill 08/26/2024 71114.05 Miscellaneous ANO 2025 Red Team 1st Quarter PI Drill 01/30/2025 71114.05 Miscellaneous ANO 2025 Green Team 1st Quarter PI Drill 03/13/2025 71114.05 Miscellaneous ANO 2025 Blue Team 2nd Quarter PI Drill 06/26/2025 71114.05 Miscellaneous NIOS/Quality Assurance Audit of Emergency Preparedness 02/18/2025
20 Inspection Procedure Type Designation Description or Title Revision or Date Off-Site Agencies Interface Interview Questionnaire - Yell County OEM 71114.05 Miscellaneous NIOS/Quality Assurance Audit of Emergency Preparedness Off-Site Agencies Interface Interview Questionnaire - Pope County OEM 02/18/2025 71114.05 Miscellaneous NIOS/Quality Assurance Audit of Emergency Preparedness Off-Site Agencies Interface Interview Questionnaire - Pope County Judge 02/18/2025 71114.05 Miscellaneous NIOS/Quality Assurance Audit of Emergency Preparedness Off-Site Agencies Interface Interview Questionnaire -
Arkansas State Department of Health 02/18/2025 71114.05 Miscellaneous NIOS/Quality Assurance Audit of Emergency Preparedness Off-Site Agencies Interface Interview Questionnaire - Logan County Emergency Management 02/18/2025 71114.05 Miscellaneous NIOS/Quality Assurance Audit of Emergency Preparedness Off-Site Agencies Interface Interview Questionnaire -
Johnson Co Dept of Emergency Management 02/18/2025 71114.05 Miscellaneous KLD - 1402 2024 Population Update Analysis 03/26/2024 71114.05 Miscellaneous KLD TR - 1312 2023 Population Update Analysis 04/03/2023 71114.05 Miscellaneous KLD TR - 2025 -
1470 2025 Population Update Analysis 04/02/2025 71114.05 Miscellaneous NQ-2025-011 QA Audit Report QA-7-2025-HQN-1, 2025 QA Audit of Emergency Preparedness 05/12/2025 71114.05 Procedures EN-LI-102 Corrective Action Program 55 71114.05 Work Orders WO 54281348-02 ACS-8001 Seismic Monitor 71114.05 Work Orders WO 54057484 Comm Link Failure 05/28/2025 71114.05 Work Orders WO 54252948 RE-8017 Rad Monitor 07/31/2025 71114.06 Miscellaneous Red Team Drill 07/30/2025 71114.06 Procedures OP-1903.010 Emergency Action Level Classification 64 71151 Calculations CALC-ANOC-SE-06-00004 ANO Mitigating System Performance Indicator Reliability and Unavailability Inputs and Guidelines 9
71151 Corrective Action Documents CR-ANO-1-2013-03213 71151 Miscellaneous 2nd Qtr 2025 Signed KPI Sheets 07/02/2025
21 Inspection Procedure Type Designation Description or Title Revision or Date 71151 Miscellaneous 1st Qtr 2025 Signed KPI Sheets 04/01/2025 71151 Miscellaneous 3rd Qtr 2023 Signed KPI Sheets 10/02/2023 71151 Miscellaneous 4th Qtr 2023 Signed KPI Sheets 01/02/2024 71151 Miscellaneous 1st Qtr 2024 Signed KPI Sheets 04/02/2024 71151 Miscellaneous 2nd Qtr 2024 Signed KPI Sheets 07/01/2024 71151 Miscellaneous 3rd Qtr 2024 Signed KPI Sheets 10/02/2024 71151 Miscellaneous 4th Qtr 2024 Signed KPI Sheets 01/06/2025 71151 Procedures EN-LI-114 Regulatory Performance Indicator Process 22 71152A Corrective Action Documents CR-ANO-1-2025-00016, 1-2025-00670, C-2025-00584, C-2025-
- 00811, 71152A Miscellaneous TDC742 0050 Instruction Manual for NH/NT Diesel Engine 0
71152A Miscellaneous TDC742 0080 Parts Catalog for Cummins Fire Pump Engine (K-5) 1 71152A Procedures OP-1104.032 Fire Protection Systems 98 71152A Procedures OP-1307.004 Diesel Fire Pump Engine (K-5) Biannual Surveillance 16, 17 71152S Corrective Action Documents CR-ANO-C-2025-00861, C-2025-01275 71152S Procedures OP-1000.006 Procedure Control 76 71153 Corrective Action Documents CR-ANO-1-2025-01382 71153 Miscellaneous LER 2025-S01-00 Arkansas Nuclear One, Units 1 and 2, Follow-up Report for a 10 CFR 73 Security Report 01/31/2025 71153 Procedures OP-1202.001 Reactor Trip 42