IR 05000313/2025003

Integrated Inspection Report 05000313/2025003 and 05000368/2025003

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

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. 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

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

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

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.

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.

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.

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.

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

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 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 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.

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 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 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.

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 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.

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

23

71111.04

Drawings

M-2263

Piping and Instrument Diagram Units 1 and 2 Control and

Computer Rooms HVAC

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

71111.04

Procedures

OP-2104,007

Control Room Emergency Air Conditioning and Ventilation

71111.04

Work Orders

WO 555146, 54105036

71111.05

Drawings

FP-2104

Fire Zone Ground Floor Plan EL 354-0

71111.05

Engineering

Evaluations

PSA-ANO1-03-

FQ

ANO-1 Fire PRA Integration and Quantification

71111.05

Engineering

Evaluations

PSA-ANO2-03

Arkansas Nuclear One Unit 2 Fire Probabilistic Risk

Assessment Summary Report

71111.05

Procedures

EN-DC-161

Control of Combustibles

71111.05

Procedures

EN-OP-125

Fire Brigade Drills

71111.05

Procedures

PFP-U1

Unit 1 Prefire Plans

71111.05

Procedures

PFP-U2

Unit 2 Prefire Plans

71111.06

Engineering

Changes

LCP-94-5022

Service Water System Crossover Valves Logic and Fire

Protection

71111.06

Miscellaneous

PSA-ANO1-01-IF-

AS

ANO-1 PRA - Internal Flooding Accident Sequence Analysis

71111.06

Procedures

OP-1203.030

Loss of Service Water

71111.06

Procedures

OP-1203.054

Internal Flooding

71111.07A

Procedures

EN-DC-316

Heat Exchanger Performance and Condition Monitoring

71111.07A

Procedures

SEP-HX-ANO-

001

Arkansas Nuclear One (ANO) Heat Exchanger Program

71111.07A

Work Orders

WO 2779637, 52998309

71111.11A

Miscellaneous

IP 71111.11

Table 3.03-1

Examination Results

08/13/2025

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-

2132, 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-24-

Simulator Post Event Test - RCP Loss Runback Without

RCP Trip

01/21/2024

71111.11B

Miscellaneous

25 Operating Test - Week 4

06/30/2025

71111.11B

Miscellaneous

25 Operating Test - Week 5

07/07/2025

71111.11B

Miscellaneous

25 Scenario Malfunction Cross Check

71111.11B

Miscellaneous

25 JPM Overlap Tracker

07/07/2025

71111.11B

Miscellaneous

ANO-1 Open Simulator Differences

2/7/2025

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-

1983Property "ANSI code" (as page type) with input value "ANSI/ANS-3.4-</br></br>1983" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process.

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

71111.11B

Procedures

EN-OP-115-02

Control Room Conduct and Access Control

71111.11B

Procedures

EN-OP-115-06

Activation and Deactivation of Licenses, and Maintaining

Active License Status

71111.11B

Procedures

EN-TQ-201

Systematic Approach to Training Process

71111.11B

Procedures

EN-TQ-202

Simulator Configuration Control

71111.11B

Procedures

EN-TQ-210

Conduct of Simulator Training

71111.11B

Procedures

EN-TQ-218

Licensed Operator Requalification Annual and Biennial

Exam Development

71111.11Q

Miscellaneous

SES-1-013

Unit 1 Dynamic Exam Scenario

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

71111.11Q

Miscellaneous

SES-1-047

Unit 1 Dynamic Exam Scenario

71111.11Q

Miscellaneous

SES-2-026

Unit 2 Dynamic Exam Scenario

71111.11Q

Miscellaneous

SES-2-030

Unit 2 Dynamic Exam Scenario

71111.11Q

Procedures

OP-1106.006

Emergency Feedwater Pump Operation

2

71111.11Q

Procedures

OP-2104.007

Control Room Emergency Air Conditioning and Ventilation

71111.11Q

Procedures

OP-2104.039

HPSI System Operation

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

71111.12

Procedures

OP-2104.028

Component Cooling Water System Operations

71111.12

Procedures

OP-2203.012-L

Annunciator 2K12 Corrective Action

71111.12

Procedures

OP-2203.016

Excess RCS Leakage

71111.12

Procedures

OP-2203.025

RCP Emergencies

71111.12

Work Orders

WO 298267

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

71111.15

Miscellaneous

TDE147.0640

Installation and Operation Manual for Shutdown Solenoid for

UG Governor

71111.15

Procedures

EN-CS-S-056-A

Review of Potentially Hazardous Seismic Category II/I

Situations

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

71111.24

Procedures

OP-1416.052

Unit 1 & 2 IAC66K Relay Test Instructions

71111.24

Procedures

OP-2104.002

Chemical and Volume Control

71111.24

Procedures

OP-2104.039

HPSI System Operation

71111.24

Procedures

OP-2304.040

Unit 2 Plant Protection System Channel D Test

71111.24

Procedures

OP-2411.066

Charging Pump Dampener Bladder 2M-115A, B, C and

2M-116A, B, C Charging, Checking and Depressurization

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

71111.24

Work Orders

WO 53024752, 54050458, 54077626, 54120201, 54159480,

264720, 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

25 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

23 Alert and Notification System Oversight Activity

10/30/2023

71114.02

Miscellaneous

Form 1903.004-K

24 Alert and Notification System Oversight Activity

11/14/2024

71114.02

Procedures

OP-1903.004

Alert and Notification System (ANS) Monitoring

Requirements

71114.03

Miscellaneous

Emergency Response Organization Roster

09/28/2023

71114.03

Miscellaneous

Emergency Response Organization Roster

2/31/2023

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

2/28/2024

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

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

71114.03

Procedures

EN-EP-306

Drills and Exercises

71114.03

Procedures

EN-EP-310

Emergency Response Organization Notification System

71114.03

Procedures

EN-EP-603

Emergency Notifications

71114.03

Procedures

EN-EP-801

Emergency Response Organization

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010-U1WC

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010-U1WC

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010-U2WC

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - OP-1903.010-U2WC

71114.04

Miscellaneous

CFR 50.54(Q) Screening - OP-1903.011-Z

71114.04

Miscellaneous

CFR 50.54(Q) Screening - OP-1903.060

71114.04

Miscellaneous

CFR 50.54(Q) Screening - OP-1903.068

71114.04

Miscellaneous

CFR 50.54(Q) Screening - OP-1903.079

71114.04

Miscellaneous

CFR 50.54(Q) Evaluation - 1904.002

71114.04

Miscellaneous

CFR 50.54(Q) Screening - 1903.011-Y

71114.04

Procedures

EN-EP-305

Emergency Planning 10 CFR 50.54(q) Review Program

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-

25-00214, 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

23 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

24 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

2/18/2025

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

2/18/2025

71114.05

Miscellaneous

NIOS/Quality Assurance Audit of Emergency Preparedness

Off-Site Agencies Interface Interview Questionnaire - Pope

County Judge

2/18/2025

71114.05

Miscellaneous

NIOS/Quality Assurance Audit of Emergency Preparedness

Off-Site Agencies Interface Interview Questionnaire -

Arkansas State Department of Health

2/18/2025

71114.05

Miscellaneous

NIOS/Quality Assurance Audit of Emergency Preparedness

Off-Site Agencies Interface Interview Questionnaire - Logan

County Emergency Management

2/18/2025

71114.05

Miscellaneous

NIOS/Quality Assurance Audit of Emergency Preparedness

Off-Site Agencies Interface Interview Questionnaire -

Johnson Co Dept of Emergency Management

2/18/2025

71114.05

Miscellaneous

KLD - 1402

24 Population Update Analysis

03/26/2024

71114.05

Miscellaneous

KLD TR - 1312

23 Population Update Analysis

04/03/2023

71114.05

Miscellaneous

KLD TR - 2025 -

1470

25 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

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

71151

Calculations

CALC-ANOC-SE-

06-00004

ANO Mitigating System Performance Indicator Reliability

and Unavailability Inputs and Guidelines

71151

Corrective Action

Documents

CR-ANO-

1-2013-03213

71151

Miscellaneous

2nd Qtr 2025 Signed KPI Sheets

07/02/2025

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

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

71152A

Miscellaneous

TDC742 0080

Parts Catalog for Cummins Fire Pump Engine (K-5)

71152A

Procedures

OP-1104.032

Fire Protection Systems

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

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

2