IR 05000263/2022002

Integrated Inspection Report 05000263/2022002

ML22208A148
Person / Time
Site:	Monticello
Issue date:	07/28/2022
From:	Hironori Peterson Region 3 Branch 3
To:	Domingos C Northern States Power Company, Minnesota
References
IR 2022002
Download: ML22208A148 (16)

Text

July 28, 2022

SUBJECT:

MONTICELLO NUCLEAR GENERATING PLANT - INTEGRATED INSPECTION REPORT 05000263/2022002

Dear Mr. Domingos:

On June 30, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Monticello Nuclear Generating Plant. On July 21, 2022, the NRC inspectors discussed the results of this inspection with you and other members of your staff. The results of this inspection are documented in the enclosed report.

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

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

Sincerely, Signed by Peterson, Hironori on 07/28/22 Hironori Peterson, Chief Branch 3 Division of Reactor Projects Docket No. 05000263 License No. DPR-22

Enclosure:

As stated

Inspection Report

Docket Number: 05000263 License Number: DPR-22 Report Number: 05000263/2022002 Enterprise Identifier: I-2022-002-0050 Licensee: Northern States Power Company, Minnesota Facility: Monticello Nuclear Generating Plant Location: Monticello, MN Inspection Dates: April 01, 2022 to June 30, 2022 Inspectors: C. Norton, Senior Resident Inspector G. Hansen, Sr. Emergency Preparedness Inspector T. McGowan, Resident Inspector V. Myers, Senior Health Physicist Approved By: Hironori Peterson, Chief 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 Monticello Nuclear Generating Plant, 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

Monticello began the inspection period at rated thermal power. On May 9, 2022, the unit was down powered to 80 percent to accommodate increased wind supply and returned to 100 percent. On May 18, 2022, the unit was reduced to 32 percent for a control rod sequence exchange and condenser cleaning. The unit returned to 100 percent on May 23, 2022, and remained at 100 percent rated thermal power 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.

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 potential deepening extreme drought and hot summer months for the following systems:

cooling tower structures 11 and 12, divisions 1 and 2 125 volt dc battery rooms, ventilation, and intake structure traveling screens on June 22, 2022

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (5 Samples)

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

(1) Control rod drive hydraulic control station on April 8, 2022

(2) Division 2 emergency diesel generator (EDG) starting air system while division 1 EDG removed from service for 12-year maintenance on April 12, 2022

(3) Division 1 EDG starting air system while division 2 EDG removed from service for 2-year maintenance on April 28, 2022

(4) High pressure coolant injection system inlet steam drains on May 4, 2022

(5) Division 2 residual heat removal service water (RHRSW) system (protected train) on

June 7, 2022 Complete Walkdown Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated system configurations during a complete walkdown of the station 345 kV and 230 kV switchyard on April 21, 2022

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) Fire Zone (FZ) 2-B, east hydraulic control unit area on April 27, 2022

(2) FZ 19-C, feedwater pipe chase on April 27, 2022

(3) FZ 17, turbine building north cable corridor 941' on April 27, 2022

(4) FZ 16, turbine building east & west corridor, elevations 911' and 931' on April 27, 2022

(5) FZ control room on April 27, 2022

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

(1) The inspectors evaluated the shift 3 onsite fire brigade training and performance during an observation of practical live fire training located at Hennepin Technical College in Eden Prairie, Minnesota on June 10, 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 room during reduction of reactor power for rod sequence exchange on May 17, 2022

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

(1) The inspectors observed and evaluated licensed operator retraining simulator evaluation on May 31, 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) Division 2 filtration service water piping replacement on June 03, 2022

(2) High pressure coolant injection maintenance window on June 23, 2022

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) Emergent EDG 11 electric fuel pump 125 VDC ground, unplanned EDG outage extension on April 15, 2022

(2) Reactor water cleanup system pipe leak connecting regenerative heat exchangers 11 and 12 on May 24, 2022

(3) Main condenser tube sheet fouling caused by elevated river flow and excessive debris at intake structure on May 18, 2022

(4) RHRSW 11 pump replacement on June 30, 2022

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) Division 2 EDG inoperable but available due to both fuel oil transfer pumps running,

===501000062468

(2) An anticipated transient without SCRAM inverter light is out, 501000063570

(3) RHRSW 11 pump alert range, 501000063699

(4) RHRSW 11 pump differential pressure in required action range,501000063933

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) ===

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

(1) OSP-EDG-0550-12, 12 EDG consolidated testing, following emergency cycle 12 preventative maintenance, Work Order 7000084768

(2) Division 2 emergency service water leakage test on June 03, 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) (3 Samples)

(1) Standby gas treatment train 'A' quarterly test on May 04, 2022

(2) Emergency service water 14 quarterly pump and valve test on June 03, 2022

(3) Spent fuel pool and reactor building exhaust plenum monitor calibration on June 24, 2022

71114.02 - Alert and Notification System Testing

Inspection Review (IP Section 02.01-02.04) (1 Sample)

(1) The inspectors evaluated the following maintenance and testing of the alert and notification system:

Annual siren inspection and maintenance records for the period from May 2020 to May 2022 Monthly alert notification system (siren) tests for the period from May 2020 to May 2022

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

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

71114.06 - Drill Evaluation

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

The inspectors evaluated:

(1) Licensed operator retraining, loss of stator water cooling with high power anticipated transient without SCRAM on May 31,

71124.03 - In-Plant Airborne Radioactivity Control and Mitigation

Permanent Ventilation Systems (IP Section 03.01) (1 Sample)

The inspectors evaluated the configuration of the following permanently installed ventilation systems:

(1) Reactor building ventilation

Use of Respiratory Protection Devices (IP Section 03.03) (1 Sample)

(1) The inspectors evaluated the licensees use of respiratory protection devices

Self-Contained Breathing Apparatus for Emergency Use (IP Section 03.04) (1 Sample)

(1) The inspectors evaluated the licensees use and maintenance of self-contained breathing apparatuses

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) Dose assessment performed on 05/12/2021

(2) Dose assessment performed on 06/28/2021

Special Dosimetric Situations (IP Section 03.04) (1 Sample)

The inspectors evaluated the following special dosimetric situations:

(1) Extremity monitoring for control rod drive changeout

OTHER ACTIVITIES - BASELINE

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

MS05: Safety System Functional Failures (SSFFs) Sample (IP Section 02.04) ===

(1) April 01, 2021 through March 31, 2022

BI02: RCS Leak Rate Sample (IP Section 02.11) (1 Sample)

(1) April 01, 2021 through March 31, 2022

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

(1) July 1, 2021 through March 31, 2022 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13)

(1 Sample)

(1) July 1, 2021 through March 31, 2022 EP03: Alert and Notification System (ANS) Reliability Sample (IP Section 02.14) (1 Sample)

(1) July 1, 2021 through March 31,

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 21, 2022, the inspectors presented the integrated inspection results to Mr. C. Domingos, Site Vice President, and other members of the licensee staff.

On April 21, 2022, the inspectors presented the radiation protection inspection results to Mr. K. Nyberg, Director of Site Performance Operations Support, and other members of the licensee staff.

On June 16, 2022, the inspectors presented the emergency preparedness baseline inspection results to Mr. R. White, Director of Nuclear Security and Emergency Preparedness, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.01 Drawings NH-36265 (M- Office and Control Building Air Flow Diagram 78

153)

NH-36489-2 (M- Circulating Water System P&ID 81

800-1)

Procedures 1444 Pre and Post Severe Weather Inspection Checklist 21

FP-WM-SR-01 Seasonal Readiness Program 9

Ops Man Heating and Ventilation 55

B.08.07-02

Work Orders 700088409 PM 11 Cooling Tower Structure 04/21/2022

71111.04 Drawings NH-36051 P&ID Diesel Oil System 87

NH-36244 Control Rod Hydraulic System 90

NH-36249 High Pressure Coolant Injection System 85

NH-36664 (M- P&ID RHR Service Water & Emergency Service Water 97

2) Systems

NH-36665 (M- P&ID Service Water System and Make-Up Intake Structure 109

811)

Procedures B.09.03-05 345 kV Substation, System Operation 46

B.09.04-05 230 kV Substation, System Operation 19

FP-OP-PEQ-01 Protected Equipment Program 27

71111.05 Fire Plans A.3-02-B East HCU Area 15

A.3-09 Control Room 10

A.3-16 Corridor, Turbine Building East and West 19

(Elevations 911' and 931')

A.3-17 Turbine Building North Cable Corridor 941' 7

A.3-19-C F.W. Pipe Chase 8

Miscellaneous Refresher Fire Brigade Training (Live Fire) - Shift 3 06/10/2022

Training for

Operators (Fire

Brigade)

71111.11Q Miscellaneous RQ-SS-200 Loss of Stator Water Cooling with High Power ATWS 0

Procedures 2300 Reactivity Adjustment 25

Inspection Type Designation Description or Title Revision or

Procedure Date

Ops Man C.2-05 Power Reduction 81

(Part B)

71111.12 Calculations 608000000828 Acceptance Review for Backseating MO-2035 1

Corrective Action 501000064141 HOCI Drain Pot Level LS-23-90/2 Alarms 06/21/2022

Documents 501000064161 Valve Found Leaking in HPCI ROOM (LS-23-90 Upper Root 06/22/2202

Isolation)

Corrective Action 501000064180 Thermal Cycling Effects on MO-2035 06/22/2022

Documents

Resulting from

Inspection

Drawings NH-36249 P&ID Steam Side High Pressure Coolant Injection System 85

NH-36665 (M- P&ID Service Water System and Make-Up Intake Structure 107

811)

Work Orders 700085070 Replacement Division 2 FSW Pipe 0

71111.13 Corrective Action 501000062285 Unexpected 11 Battery Ground Alarm 04/15/2022

Documents 501000063307 RWCU leak 05/23/2022

Drawings NH-36254 (M- P&ID Reactor Water Cleanup System 89

28)

Procedures 8006-01 Partial Condenser Isolation and Entry Procedure (Inner 17

Loop)

8006-02 Partial Condenser Isolation and Entry Procedure (Outer 17

Loop)

Work Orders 700106976 RWCU Regenerative HX 11 05/23/2022

700107976 11 RHRSW Pump Replacement 13

71111.15 Corrective Action 501000062468 EDG FO Pumps Found Running, 12 EDG Inoperable 04/21/2022

Documents 501000063570 A ATWS Inverter Light is Out 06/01/2022

501000063699 11 RHRSW Pump Alert Range 06/09/2022

501000063933 11 RHRSW Pump dp in Required Action Range 06/16/2022

Drawings NX-16162-1-10 ATWS Elementary Diagram Anticipated Transient Without 77

SCRAM Recirculation Pump Trip System

NX-16162-1-2 ATWS Elementary Diagram 76

NX-16162-1-3 ATWS Elementary Diagram 77

Procedures 0255-05-1A-1-1 A RHRSW Quarterly Pump and Valve Test 88

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.19 Corrective Action 501000062640 12 EDG Overspeed Limit Switch Fail 04/27/2022

Documents

Procedures 4106-01 Emergency Diesel 1 Cycle Maintenance 42

OSP-EDG-0550- 12 Emergency Diesel Generator Consolidated Testing 10

Work Orders 700061183-0020 SW to V-EAC-14A Check Valve 4

700084768-01 12 Emergency Diesel Precision Maintenance Critical 04/28/2022

Component

71111.22 Drawings NH-36881 (M- Standby Gas Treatment Flow Diagram 82

145)

Procedures 0068 Spent Fuel Pool & Reactor Building Exhaust Plenum Monitor 46

Calibration

253-01 SBGT A Train Quarterly Test 56

255-11-III-4 14 ESW Quarterly Pump and Valve Test 65

71114.02 Corrective Action 501000040374 ERO Pagers Not Activated by Callout System 05/07/2020

Documents

501000047678 Siren S-46 Performance Trending 01/12/2021

501000049221 ANS PANS Siren Activation Test Issue 03/03/2021

501000053844 PANS (1359) Siren Activation Issue 07/07/2021

501000058346 Potential PANS Siren Adverse Trend 12/27/2021

501000061174 MNGP ANS Design Report Discrepancy 03/10/2022

501000061999 Potential Failure 04/06/2022

501000062411 AC Power Disconnected from 2 PANS sirens 04/29/2022

Miscellaneous Siren Testing and Maintenance Data 06/01/2021 -

04/30/2022

Annual PANS Performance Review Records 06/01/2020 -

05/31/2022

ANS Alert and Notification System Design Report 5

Work Orders 700067305-0010 Semi-Annual Auto-Dialing Telephone Notification System 10/23/2020

Testing and Maintenance Verification

700075031-0010 Semi-Annual Auto-Dialing Telephone Notification System 05/20/2021

Testing and Maintenance Verification

700083271-0010 Semi-Annual Auto-Dialing Telephone Notification System 10/13/2021

Testing and Maintenance Verification

Inspection Type Designation Description or Title Revision or

Procedure Date

700091533-0010 Semi-Annual Auto-Dialing Telephone Notification System 04/12/2022

Testing and Maintenance Verification

Procedures MNGP 1359 Public Alert Notification Systems (PANS) Weekly Cancel 25

Signal Test and Monthly Activation Test

MNGP 1408 Annual PANS Performance Review 10

71114.03 Corrective Action 501000040374 ERO Pagers Not Activated by Callout System 05/07/2020

Documents 501000056704 ERO Position with Minimum Staff Qualified 10/04/2021

Miscellaneous Monticello Nuclear Generating Plant On-Shift Staffing 5A

Analysis

ERO 4 Team Duty Roster 05/12/2022

ERO Training and Qualification Records (Sample -15 06/15/2022

personnel)

ERO Augmentation Drill Records 05/01/2020 -

03/31/2022

Procedures 5790-102-04 Emergency Call List - NUE 105

5790-104-04 Emergency Call List - Alert/Site Area/General 133

A.2-001 Emergency Organization 57

A.2-10 Activation and Operation of the OSC 41

A.2-111 Activation and Operation of the Alternative Facilities During 7

a Security Threat

A.2-802 Activation and Operation of the EOF 26

FL-BEP Fleet Emergency Plan Training Program Description 4

MNGP 1317 Emergency Alert Notification System Test 30

MT-BEP Monticello Emergency Plan Training Program Description 32

71114.05 Corrective Action 501000042396 EP HP Mini-Drill Critique Report 07/17/2020

Documents 501000045279 NUE Follow-up Actions 10/08/2020

501000046971 22 SCBA Bottles Needed by May 2021 12/08/2021

501000047766 Control Room Habitability Survey New Chemical 01/14/2021

501000048506 PA Speakers Making Buzzing Noise 02/08/2021

501000048867 PA Speakers 985 Non-Audible 02/19/2021

501000053100 Wide Range Gas Monitor Adverse Trend 06/11/2021

501000053359 Seals Missing from OSC Cabinet 06/22/2021

501000053609 EP Drill- Procedure May Not Be Adequate 06/29/2021

Inspection Type Designation Description or Title Revision or

Procedure Date

501000053641 EP Drill Field Team Equipment Issues 06/29/2021

501000057175 EP Medical Drill - Knowledge Gaps 10/13/2021

501000062592 Current LOA with Wright County 04/26/2022

Miscellaneous Semi-Annual Auto-Dialing Telephone Notification System 06/01/2020-

Testing and Maintenance Verification Records 04/30/2022

EP Critique Report - 2020 EP Medical Drill 12/20/2020

EP Critique Report - 2021 EP Medical Drill 11/23/2021

EP Critique Report - 2020 HP Mini Drill 1 08/07/2020

EP Critique Report - 2020 HP Mini Drill 2 01/20/2021

EP Critique Report - 2021 HP Mini Drill 1 07/12/2021

Monticello 8 Year EP Drill / Exercise Cycle Objectives Table 05/31/2022

22 Monticello Emergency Planning Guide 01/01/2022

EP Critique Report - 20A Table-Top Drill Series Report 11/19/2020

EP Critique Report - 20B Table-Top Drill Series Report 09/13/2021

EP Critique Report - August 20, 2021, NRC Evaluated 09/24/2021

Exercise

EP Critique Report - June 29, 2021, EP Full Scale Drill 08/06/2021

1102-01 Emergency Equipment Inventory Records 06/01/2020-

03/31/2022

1102-02 Emergency Equipment Inventory Records 06/01/2020-

03/31/2022

1441-01 Quarterly EOF Ventilation Testing Records 06/01/2020-

04/30/2022

1441-02 Annual EOF Ventilation Testing Records 11/01/2020-

2/31/2021

KLD TR-040 Monticello Nuclear Generating Plant Population Update 10/26/202

Analysis -2020

KLD TR-505 Monticello Nuclear Generating Plant Evacuation Time 1

Estimate

QF0174-EP-2021 Nuclear Oversight Emergency Preparedness Annual 12/17/2021

Evaluation; Emergency Preparedness Program Evaluation

(Fleet/MT/PI)

Procedures Monticello Nuclear Generating Plant Emergency Plan 55

Inspection Type Designation Description or Title Revision or

Procedure Date

1410 Semi-Annual Auto-Dialing Telephone Notification System 11

Testing and Maintenance Verification

FP-EP-SURV-05 Requirements for Annual Independent Review of EP 5

Program

MNGP 1225 Emergency Procedures Monthly Contact Verification 65

MNGP 1230 MNGP 1230 48

71114.06 Procedures 5790-101-02 Emergency Action Level Matrix 14

71124.03 Corrective Action 501000061365 Steam Jet Air Ejector Room Air Sample 03/16/2022

Documents

Miscellaneous SCBA Test Results 12/23/2021

Radiation Work 210122 Repair/Replace Reactor Water Cleanup Valves 0

Permits (RWPs) 215509 Control Rod Drive Changeout 0

71124.04 Corrective Action 501000049517 Unexpected Dose on Dosimeters 03/12/2021

Documents

Miscellaneous Internal Dose Assessment 06/28/2021

Internal Dose Assessment 05/12/2021

19-002 Technical Basis Document for the Sensitivity Study of 0

ARGOS 4/5, PM7 and GEM-5 Monitors

Procedures FP-RP-DP-01 Dosimetry Program 14

FP-RP-IDA-01 Internal Dose Assessment 4

71151 Miscellaneous NRC Performance Indicator Data; 07/01/2021 -

Emergency Preparedness - Drill/Exercise Performance; 03/31/2022

3rd Quarter 2021 - 1st Quarter 2022

NRC Performance Indicator Data; 07/01/2021 -

Emergency Preparedness - ERO Readiness 03/31/2022

NRC Performance Indicator Data; 07/01/2021 -

Emergency Preparedness - Alert and Notification System 03/31/2022

QF0445 NRC and Data Collection and Submittal - Safety System 18

Functional Failures (April 2021 through March 2022)

QF0445 NRC Data Collection and Submittal - Reactor Coolant 18

System Total Leakage (April 2021 through March 2022)

Procedures FP-PA-PI-02 NRC and MOR Performance Indicator Reporting 16

14