IR 05000335/2022002

Integrated Inspection Report 05000335/2022002 and 05000389/2022002

ML22209A227
Person / Time
Site:	Saint Lucie
Issue date:	08/01/2022
From:	David Dumbacher NRC/RGN-II/DRP/RPB3
To:	Coffey B Florida Power & Light Co
References
IR 2022002
Download: ML22209A227 (10)

Text

SUBJECT:

ST LUCIE UNITS 1 & 2 - INTEGRATED INSPECTION REPORT 05000335/2022002 AND 05000389/2022002

Dear Mr. Coffey:

On June 30, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at St Lucie Units 1 & 2. On July 14, 2022, the NRC inspectors discussed the results of this inspection with Mr. Dan DeBoer 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, David E. Dumbacher, Chief Reactor Projects Branch 3 Division of Reactor Projects 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: 05000335/2022002 and 05000389/2022002

Licensee: Florida Power & Light Company

Facility: St Lucie Units 1 & 2

Location: Jensen Beach, FL

Inspection Dates: April 01, 2022 to June 30, 2022

Inspectors: D. Orr, Senior Resident Inspector S. Roberts, Resident Inspector

Approved By: David E. Dumbacher, Chief Reactor Projects Branch 3 Division of Reactor Projects

Enclosure SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at St Lucie Units 1 & 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 operated at or near rated thermal power (RTP) for the entire inspection period.

Unit 2 began the inspection period at RTP. On June 6, 2022, the unit was down powered to 95 percent RTP when the 2A heater drain pump tripped due to an electrical ground on the motor. The 2A heater drain pump motor was replaced and the unit was returned to RTP on June 13, 2022, and remained at or near RTP for the remainder 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

71111.01 - 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 hurricane season on May 31, 2022, for the following systems:

Unit 1 and 2 intake cooling water (ICW)

Unit 1 emergency diesel generator (EDG) fuel oil Unit 1 component cooling water (CCW)

Impending Severe Weather Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated the adequacy of the overall preparations to protect risk-significant systems from impending severe weather due to Potential Tropical Cyclone One on June 2 - 4, 2022.

External Flooding Sample (IP Section 03.03) (1 Sample)

(1) The inspectors evaluated that flood protection barriers, mitigation plans, procedures, and equipment are consistent with the licensees design requirements and risk analysis assumptions for coping with external flooding on June 22, 2022.

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) 1A EDG and fuel oil transfer system while the 1B EDG was out of service (OOS) for an emergent repair to the 1B fuel oil transfer pump on April 11 - 13, 2022 (2) Unit 2 ICW system during and after planned maintenance associated with the 2C ICW pump on April 26 - 27, 2022 (3) 1A and 1C charging trains while the 1B charging pump was OOS for corrective maintenance on May 26, 2022

Complete Walkdown Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated system configurations during a complete walkdown of the Unit 2 125Vdc system on June 22, 2022.

71111.05 - Fire Protection

Fire Area Walkdown and Inspection Sample (IP Section 03.01) (4 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, Fire Zone (FZ) 16, emergency core cooling system (ECCS) pump rooms on April 19, 2022 (2) Unit 1, FZ 34 and 35, ECCS pump rooms on April 20, 2022 (3) Unit 2, FZ 51, reactor auxiliary building (RAB) 19.5 elevation corridor on April 27, 2022 (4) Unit 1, FZ 77 & 78, electrical penetration rooms on May 14, 2022

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 on June 27, 2022.

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 rooms during:

Unit 1 reactor protection system linear power range safety and control channel monthly calibration on June 1, 2022 Unit 1 hand indicating controller for pressurizer spray valves troubleshooting on June 1, 2022 Unit 2 reactor controls operator turnover on June 17, 2022

Unit 1 hand indicating controller for pressurizer spray valves replacement on June 23, 2022 Unit 2 entry into 2-AOP-66.02, Rod Position Indication System Abnormal Operations, for control element assembly 22 reed switch position reading erratically on June 23, 2022

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 on May 23, 2022.

71111.12 - Maintenance Effectiveness

Maintenance Effectiveness (IP Section 03.01) (2 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) AR 2425106, 1B EDG fuel oil transfer pump breaker starter contactor failure, review completed on June 21, 2022 (2) AR 2426891, 2A ICW pump vibrations have rapidly increased over the last 3 days, and AR 2430680, formal documentation of maintenance rule event, review completed on June 27, 2022

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (6 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) Units 1 and 2 elevated risk for 2B EDG partial endurance run on April 25, 2022 (2) Units 1 and 2 elevated risk for 2A EDG planned maintenance on May 9, 2022 (3) Unit 2 elevated risk for 2A ICW pump emergent maintenance on May 17, 2022 (4) Units 1 and 2 elevated risk for the 2B EDG endurance run and 2A ICW emergent maintenance on May 23, 2022 (5) Unit 1 elevated risk for the 1A CCW heat exchanger planned maintenance from May 31 - June 2, 2022 (6) Units 1 and 2 elevated risk for 1B EDG emergent maintenance from June 13 - 19, 2022

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (5 Samples)

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

(1) AR 2424817, Suspected loose part in Unit 2 reactor coolant system (RCS),

referenced to control element assembly (CEA) #27 root cause evaluation and CSTL2-LPEV-TR-MZ-000001, St Lucie Unit 2 Loose Parts Evaluation, review completed on May 10, 2022 (2) AR 2418910, Unit 1 R-10 engineered safeguards ATI fault is in alarm, review completed on May 17, 2022 (3) AR 2426007, Low fuel oil pressure on 2B EDG, review completed on June 21, 2022 (4) AR 2424496 and 2425106, 1B EDG fuel oil transfer pump failed to start, review completed on June 21, 2022 (5) AR 2428345, Part 21 vendor notice; St Lucie 1&2 class 1E vacuum type 4kV breaker, review completed on June 21, 2022

71111.18 - Plant Modifications

Severe Accident Management Guidelines (SAMG) Update (IP Section 03.03) (1 Sample)

(1) The inspectors verified the site Severe Accident Management Guidelines were updated in accordance with the Pressurized Water Reactor generic severe accident technical guidelines and validated in accordance with NEI 14-01, Emergency Response Procedures and Guidelines for Beyond Design Basis Events and Severe Accidents, Revision 1.

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) (6 Samples)

The inspectors evaluated the following post-maintenance testing activities to verify system operability and/or functionality:

(1) WO 40682250, EC 293696 4.16kV Switchgear 2A3-2 2X/251 Relay Replacement, reviewed on May 3, 2022 (2) WO 40768728, 2-OSP-69.14A, ESF - Surveillance for EDG Start on Safety Injection Activation Signal (SIAS) Without Loss of Offsite Power (LOOP) and 24-Hour Run -

Train A; and WO 40785981, 2-OSP-59.01A, 2A Emergency Diesel Generator Monthly Surveillance, after 2B EDG critical maintenance management activities, reviewed on May 24, 2022 (3) WO 40784097, 2-OSP-21.01A, 2A Intake Cooling Water Pump Code Run, after 2A ICW pump replacement, reviewed on June 2, 2022 (4) WO 40771919, ADM-78.01, Post Maintenance Testing, after replacement of TCV-04-14A, ICW temperature control vale for 1 A CCW heat exchanger, reviewed on June 13, 2022 (5) WO 40828549. 2-SMI-09.43A, Auxiliary Feedwater Actuation System Monthly Functional Test Channel A, after AR 2428461, AFAS-2 MA Channel B SG Level Low Found in Trip Condition, reviewed on June 21, 2022 (6) WO 40763696, MA-AA-100-1014 Limitorque Motor Operated Valve Testing and Actuator Inspections, after 1A low pressure safety injection motor operated valve, HCV-3615, actuator inspection, reviewed on June 21, 2022

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance testing activities to verify system operability and/or functionality:

Surveillance Tests (other) (IP Section 03.01) (2 Samples)

(1) 2-SMI-09.40, Auxiliary Feedwater Actuation System Actuation Relay Test, reviewed on April 27, 2022 (2) 2-SMI-69.02, Engineered Safeguards Actuation System - Channel Functional Test, reviewed on May 10, 2022

Inservice Testing (IP Section 03.01) (1 Sample)

(1) 2-OSP-09.01C, 2C Auxiliary Feedwater Pump Code Run, reviewed on May 10, 2022

71114.06 - Drill Evaluation

Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1 Sample)

(1) On May 25, 2022 the inspectors evaluated an emergency response drill that included an uncontrolled lowering of steam generator water level, manual reactor trip, loss of offsite power, reactor coolant system leak, and release from containment. The scenario included situations that resulted in declarations of Unusual Event, Alert, Site Area Emergency, and General Emergency.

Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)

The inspectors evaluated:

(1) On May 23, 2022, the inspectors evaluated a licensed operator continuing training simulator evaluation that included a small break loss of coolant accident resulting in an Alert declaration and notification to the Florida State Watch Officer and St Lucie and Martin County Emergency Operations Centers.

OTHER ACTIVITIES - BASELINE

71151 - Performance Indicator Verification

The inspectors verified licensee performance indicators submittals listed below:

BI01: Reactor Coolant System (RCS) Specific Activity Sample (IP Section 02.10) (2 Samples)

(1) Unit 1, April 1, 2021 through March 31, 2022 (2) Unit 2, April 1, 2021 through March 31, 2022

BI02: RCS Leak Rate Sample (IP Section 02.11) (2 Samples)

(1) Unit 1, April 1, 2021 through March 31, 2022 (2) Unit 2, April 1, 2021 through March 31, 2022

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) U1 CCW protective coatings upgrade project:

o AR 2254331 - 1A CCW structural and pipe components in northeast corner of CCW o AR 2368474 - MV-14-2 severe corrosion on torque tube base o AR 2409309 - corrosion found on pipe Unit 1 CC-16 AT hanger 8770-YPH-16 o AR 2409310 - corrosion found on pipe Unit 1 CC-16 AT hanger 8770-CC-25-5

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

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

On July 14, 2022, the inspectors presented the integrated inspection results to Mr. Dan DeBoer and other members of the licensee staff.

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