IR 05000335/2025001

Integrated Inspection Report 05000335/2025001 and 05000389/025001

ML25114A129
Person / Time
Site:	Saint Lucie
Issue date:	04/25/2025
From:	Shawn Smith Division of Operating Reactors
To:	Coffey R Florida Power & Light Co
References
IR 2025001 IR 2025001
Download: ML25114A129 (13)

Text

SUBJECT:

SAINT LUCIE PLANT, UNITS 1 AND 2 - INTEGRATED INSPECTION REPORT 05000335/2025001 AND 05000389/2025001

Dear Robert Coffey:

On March 31, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Saint Lucie Plant, Units 1 and 2. On April 15, 2025, the NRC inspectors discussed the results of this inspection with Mr. Carlos Santos, Site Vice President and other members of your staff.

The results of this inspection are documented in the enclosed report.

No findings or violations of more than minor significance were identified during this inspection.

This letter, its enclosure, and your response (if any) will be made available for public inspection and copying at http://www.nrc.gov/reading-rm/adams.html and at the NRC Public Document Room in accordance with Title 10 of the Code of Federal Regulations 2.390, Public Inspections, Exemptions, Requests for Withholding.

Sincerely, Steven P. Smith, Chief Projects Branch 6 Division of Operating Reactor Safety Docket Nos. 05000335 and 05000389 License Nos. DPR-67 and NPF-16

Enclosure:

As stated

Inspection Report

Docket Numbers:

05000335 and 05000389

License Numbers:

DPR-67 and NPF-16

Report Numbers:

05000335/2025001 and 05000389/2025001

Enterprise Identifier:

I-2025-001-0030

Licensee:

Florida Power & Light Company

Facility:

Saint Lucie Plant, Units 1 and 2

Location:

Jensen Beach, FL 34957

Inspection Dates:

January 01, 2025 to March 31, 2025

Inspectors:

S. Battenfield, Operations Engineer

S. Bruneau, Resident Inspector

A. Donley, Senior Resident Inspector

J. Hickman, Senior Resident Inspector

E. Morris, Senior Resident Inspector

D. Orr, Senior Project Engineer

M. Rich, Emergency Preparedness Inspector

J. Rivera, Health Physicist

J. Walker, Senior Emergency Preparedness Inspector

Approved By:

Steven P. Smith, Chief

Projects Branch 6

Division of Operating Reactor Safety

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Saint Lucie Plant, Units 1 and 2, in accordance with the Reactor Oversight Process. The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.

List of Findings and Violations

No findings or violations of more than minor significance were identified.

Additional Tracking Items

None.

PLANT STATUS

Unit 1 and Unit 2 operated at or near rated thermal power for the entire 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.

71111.01 - Adverse Weather Protection

Seasonal Extreme Weather Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated readiness for seasonal extreme weather conditions prior to the onset of cold temperatures for the following systems on January 7, 2025:

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (4 Samples)

The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:

(1) Auxiliary feedwater pumps A and B valve alignments during the installation of flow transmitter FT 09-2A2. Inspection completed on January 15, 2025.

(2) Control room air conditioners HVA-3A and HVA-3B alignments during the preventative maintenance of the air condition unit HVA-3C. Inspection completed January 24, 2025.

(3) Emergency diesel generator 2B startup air valve alignments during planned maintenance of the 2B emergency diesel generator. Inspection completed February 19, 2025.

(4) Component cooling water heat exchanger 2A and associated intake cooling water valve alignments during component cooling water heat exchanger 2B planned maintenance. Inspection completed February 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 steam driven auxiliary feedwater system on February 28, 2025.

71111.05 - Fire Protection

Fire Area Walkdown and Inspection Sample (IP Section 03.01) (5 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 1 fire zone 56 switchgear room 1B on January 3, 2025

(2) Unit 2 fire zone 51E and 51W 19.5ft level of reactor auxiliary building on January 14, 2025

(3) Unit 2 fire zone 16 emergency core cooling system pumps room on January 14, 2025

(4) Unit 2 fire zone 8 2A emergency diesel generator room on January 27, 2025

(5) Unit 2 fire zone 9 2B emergency diesel generator room on January 27, 2025

Fire Brigade Drill Performance Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated the onsite fire brigade training and performance during an unannounced fire drill on February 4, 2025.

71111.07A - Heat Exchanger/Sink Performance

Annual Review (IP Section 03.01) (1 Sample)

The inspectors evaluated readiness and performance of:

(1) Component cooling water heat exchanger 2B during a clean, inspect, and eddy current test preventive maintenance activity. Completed February 27, 2025.

71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance

Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01) (1 Sample)

(1) The inspectors observed and evaluated licensed operator performance in the control room during Unit 1 replacement of subgroup 5 control element assembly upper gripper coil power management drawer on February 27, 2025, fast start of the 1A emergency diesel generator on March 3, 2025, and during a tornado warning which occurred on March 10, 2025.

Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)

(1) The inspectors observed and evaluated a licensed operator continuing training evaluation in the control room simulator that included a loss of offsite power, a total loss of feed water, and a once-through-cooling on January 21, 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 1 intake cooling water pump 1A1 calculated head in required action range review completed on February 7, 2025 (Action Request 2480680)

(2) Unit 1 intake cooling water pump 1A motor degraded review completed on February 7, 2025 (Action Request 2507348)

(3) Unit 2 reactor auxiliary building supply fan HSV-4B motor bearing failure review completed February 28, 2025 (Action Request 2507544)

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (4 Samples)

The inspectors evaluated the accuracy and completeness of risk assessments for the following planned and emergent work activities to ensure configuration changes and appropriate work controls were addressed:

(1) Unit 2 elevated risk while the 2B emergency diesel generator was out of service for planned maintenance during the week of February 17, 2025

(2) Unit 2 elevated risk while the 2B component cooling water heat exchange was out of service for planned maintenance during the week of February 24, 2025

(3) Unit 1 elevated risk while the 1A charging pump was out of service for planned maintenance during the week of March 3, 2025

(4) Unit 2 elevated risk while the 2A charging pump was out of service for planned maintenance and during a tornado warning in the area during the week of March 10, 2025

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (7 Samples)

The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:

(1) Unit 2 component cooling water pump seal is identified not meeting ASME Section III Class 3 requirements review completed January 14, 2025 (Action Request 2505098)

(2) Unit 1 B emergency diesel generator startup air compressor motor breaker tripped and would not reset review completed January 22, 2025 (Action Request 2505905)

(3) Unit 1 A1 safety injection tank level above technical specification limit review completed February 5, 2025 (Action Request 2506489)

(4) Unit 1 safety injection piping identified voids review completed February 14, 2025 (Action Request 2507825 and 2507828)

(5) Unit 1 B emergency diesel generator pinhole leak of fuel oil piping to pressure gage review completed February 20, 2025 (Action Request 25008002)

(6) Unit 2 B emergency core cooling system recirculation valve V3496 abnormal operation review completed February 24, 2025 (Action Request 2508410)

(7) Unit 2 steam generator sample valves failure of the closed indication in the control room review completed February 26, 2025 (Action Request 2505818)

71111.18 - Plant Modifications

Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (1 Sample)

The inspectors evaluated the following temporary or permanent modifications:

(1) Unit 2 replacement of Rosemount auxiliary feedwater pump discharge flow transmitters FT-09-2A2, FT-09-2B1, FT-09-2B2, and FT-09-2C1 review completed on January 23, 2025 (Engineering Change 295465)

71111.24 - Testing and Maintenance of Equipment Important to Risk

Post-Maintenance Testing (PMT) (IP Section 03.01) (8 Samples)

(1)2-OSP-99-08B, "B Train Quarterly Non-Check Valve Cycle Test," following the replacement of Unit 2 solenoid valve for the shutdown heat exchanger component cooling water return valve HCV-14-3B. Review completed on January 16, 2025 (Work Order 40966684).

(2)2-SMI-09.54A, "F-09-2A2 Auxiliary Feedwater Pump 2A Flow Channel Calibration,"

following the replacement of the Unit 2 discharge flow transmitter on the 2A auxiliary feedwater pump FT-09-2A2. Review completed on January 17, 2025 (Work Order

===40769960).

(3)1-OSP-25.07C, "Train C Control Room Ventilation Surveillance Test," following the inspection and lubrication preventative maintenance of the Unit 1 HVA-3C control room air conditioner unit. Review completed January 24, 2025. (Work Order 40965626-02).

(4)1-OSP-21.02A, "1A Intake Cooling Water Pump Preservice Test," following the replacement of 1A intake cooling water pump and motor. Review completed on February 10, 2025 (Work Order 40695995 and 41003167).

(5)2-OSP-59.01B, "2B Emergency Diesel Generator Monthly Surveillance," following emergency diesel generator 18 month planned preventative maintenance. Review completed on February 20, 2025 (Work Order 40965636 and 40972060).

(6)2-NOP-14.02, "Component Cooling Water System Operation," following 2B component cooling water heat exchanger cleaning, coating, and eddy current testing. Review completed on March 3, 2025 (Work Order 40969122 and 40850468).

(7)1-OSP-02.01A, "1A Charging Pump Code Run," following 1A charging pump packing cartridge maintenance. Review completed on March 6, 2025 (Work Order 41003623).

(8)2-NOP-02.02, "Charging and Letdown," following 2A charging pump breaker replacement completed on March 12, 2025 (Work Order 41009159).

Surveillance Testing (IP Section 03.01)===

(1)2-OSP-59.01A, "2A EDG Monthly Surveillance," completed on January 7, 2025 (2)0-OSP-37.01, "Emergency Cooling Water Canal - Periodic Test," completed on February 6, 2025 (3)1-OSP-09.01C, "1C Auxiliary Feedwater Pump Code Run," completed on March 19, 2025

Inservice Testing (IST) (IP Section 03.01) (3 Samples)

(1)2-OSP-21.01A, "2A Intake Cooling Water Pump Code Run," completed February 12, 2025 (2)2-OSP-09.01B, "2B Auxiliary Feedwater Pump Code Run," completed February 26, 2025 (3)2-OSP-07.04A, "1A Containment Spray Pump Code Run," completed March 6, 2025

Diverse and Flexible Coping Strategies (FLEX) Testing (IP Section 03.02) (1 Sample)

(1)0-OSP-83.04, "Periodic Testing of the Flex 480V Diesel Generator (DG) B and C," review completed on March 4, 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 during the week of January 13, 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 Response Organization during the week of January 13, 2025.

71114.04 - Emergency Action Level and Emergency Plan Changes

Inspection Review (IP Section 02.01-02.03) (1 Sample)

(1) The inspectors evaluated submitted Emergency Action Level, Emergency Plan, and Emergency Plan Implementing Procedure changes during the week of January 13, 2025. This evaluation does not constitute NRC approval.

71114.05 - Maintenance of Emergency Preparedness

Inspection Review (IP Section 02.01 - 02.11) (1 Sample)

(1) The inspectors evaluated the maintenance of the emergency preparedness program during the week of January 13, 2025.

71114.06 - Drill Evaluation

Required Emergency Preparedness Drill (1 Sample)

(1) On March 11, 2025, the inspectors evaluated an emergency response drill that included an unidentified reactor coolant leak, manual reactor trip, contaminated injured person, 2C charging pump failure, 2A containment spray pump failure, and reactor coolant system sample line dose rates in excess of levels indicating fuel clad failure. The scenario included situations that resulted in declarations of Unusual Event, Alert, Site Area Emergency, and General Emergency.

Additional Drill and/or Training Evolution (1 Sample)

The inspectors evaluated:

(1) On January 13, 2025, the inspectors evaluated a licensed operator continuing training simulator evaluation that included a loss of offsite power, total loss of feed water, and once through cooling resulting in a Site Area Emergency declaration and notification to the Florida State Watch Officer and St. Lucie and Martin County Emergency Operations Centers.

71124.04 - Occupational Dose Assessment

Source Term Characterization (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated licensee performance as it pertains to radioactive source term characterization.

External Dosimetry (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated how the licensee processes, stores, and uses external dosimetry.

Internal Dosimetry (IP Section 03.03) (2 Samples)

The inspectors evaluated the following internal dose assessments:

(1) Level 1 facial personnel contamination event (PCE).

(2) Level 2 facial PCE.

Special Dosimetric Situations (IP Section 03.04) (2 Samples)

The inspectors evaluated the following special dosimetric situations:

(1) Two declared pregnant workers (DPWs).

(2) Effective dose equivalent external (EDEX) monitoring for Unit 1 excore detector work activities.

OTHER ACTIVITIES - BASELINE

===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:

IE01: Unplanned Scrams per 7000 Critical Hours Sample (IP Section 02.01)===

(1) Unit 1 (January 1, 2024 - December 31, 2024)

(2) Unit 2 (January 1, 2024 - December 31, 2024)

IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 02.02) (2 Samples)

(1) Unit 1 (January 1, 2024 - December 31, 2024)

(2) Unit 2 (January 1, 2024 - December 31, 2024)

IE04: Unplanned Scrams with Complications (USwC) Sample (IP Section 02.03) (2 Samples)

(1) Unit 1 (January 1, 2024 - December 31, 2024)

(2) Unit 2 (January 1, 2024 - December 31, 2024)

EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)

(1) January 1 through September 30, 2024 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13) (1 Sample)

(1) January 1 through September 30, 2024 EP04: Emergency Response Facility and Equipment Readiness (ERFER) (IP Section 02.14)

This is a new NRC performance indicator, described in NEI 99-02, Revision 8 (ML24331A114). Licensees began collecting data for this performance indicator January 1, 2025. Therefore, at the time of inspection there was no quarterly data compiled and submitted to the NRC.

71152A - Annual Follow-up Problem Identification and Resolution Annual Follow-up of Selected Issues (Section 03.03)

The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:

(1) Unit 1 intake cooling water flange corrosion pipe deficiency (Action Request 2436618 and 2436670) was selected for follow-up to verify the licensees corrective actions were timely (scheduled for SL1-33) and adequate to resolve the deficiencies and mitigate occurrence of leaks at isolation valve SB21234. Review completed on February 20, 2025

(2) NRC inspectors conducted a safety conscious work environment inspection sample during the week of March 17, 2025, as a follow-up to issues identified in the Saint Lucie, Units 1 & 2 - Biennial Problem Identification and Resolution Inspection Report 05000335/2024011 and 05000389/2024011 (ADAMS Accession No. ML24262A044)completed on June 28, 2024. The inspectors reviewed the results of independent safety culture assessments performed in November 2024 and February 2025. The inspectors conducted 23 interviews with 29 personnel, the majority being from the operations department. No new safety culture issues were identified during this inspection.

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

• On April 15, 2025, the inspectors presented the integrated inspection results to Mr.

Carlos Santos, Site Vice President and other members of the licensee staff.

• On January 16, 2025, the inspectors presented the emergency preparedness program inspection results to Mr. Carlos Santos, Site Vice President and other members of the licensee staff.

• On February 13, 2025, the inspectors presented the radiation protection inspection results to Mr. Carlos Santos, Site Vice President and other members of the licensee staff.

THIRD PARTY REVIEWS The inspectors reviewed the Institute of Nuclear Power Operations & World Association of Nuclear Operators report that was issued during this inspection period.

DOCUMENTS REVIEWED

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

St. Lucie Radiological Emergency Plan

Rev. 76

Emergency Action Level Matrix - HOT

Rev. 9

71114.05

Procedures

Emergency Action Level Matrix - COLD

Rev. 7

Corrective Action

Documents

AR 02486610

Unit 2 Containment Neutron Dose Assessment

07/01/2024

Miscellaneous

HP-100-042524-

Neutron Dose Correction for Personnel Performing Power

Entries into the Unit 2 Reactor Containment Building During

23 and January/February 2024

05/03/2024

HPP-30

Personnel Monitoring

Rev. 67

RP-AA-101-1001

Personnel Monitoring Device Issue

Rev. 5

71124.04

Procedures

RP-AA-101-2004

Method For Monitoring and Assigning Effective Dose

Equivalent (EDE) for High Dose Gradient Work

Rev. 8