IR 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
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, 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:
Report Number:
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
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.
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 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
- (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,
RADIATION SAFETY
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:
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
Procedure
Type
Designation
Description or Title
Revision or
Date
NH-36265 (M-
153)
Office and Control Building Air Flow Diagram
Drawings
NH-36489-2 (M-
800-1)
1444
Pre and Post Severe Weather Inspection Checklist
FP-WM-SR-01
Seasonal Readiness Program
Procedures
Ops Man
B.08.07-02
Heating and Ventilation
Work Orders
700088409
PM 11 Cooling Tower Structure
04/21/2022
NH-36051
P&ID Diesel Oil System
NH-36244
Control Rod Hydraulic System
NH-36249
High Pressure Coolant Injection System
NH-36664 (M-
2)
P&ID RHR Service Water & Emergency Service Water
Systems
Drawings
NH-36665 (M-
811)
P&ID Service Water System and Make-Up Intake Structure
109
B.09.03-05
345 kV Substation, System Operation
B.09.04-05
230 kV Substation, System Operation
Procedures
FP-OP-PEQ-01
Protected Equipment Program
A.3-02-B
East HCU Area
A.3-09
Control Room
A.3-16
Corridor, Turbine Building East and West
(Elevations 911' and 931')
A.3-17
Turbine Building North Cable Corridor 941'
Fire Plans
A.3-19-C
F.W. Pipe Chase
Miscellaneous
Refresher
Training for
Operators (Fire
Brigade)
Fire Brigade Training (Live Fire) - Shift 3
06/10/2022
Miscellaneous
RQ-SS-200
Loss of Stator Water Cooling with High Power ATWS
Procedures
2300
Reactivity Adjustment
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Ops Man C.2-05
(Part B)
Power Reduction
Calculations
608000000828
Acceptance Review for Backseating MO-2035
501000064141
HOCI Drain Pot Level LS-23-90/2 Alarms
06/21/2022
Corrective Action
Documents
501000064161
Valve Found Leaking in HPCI ROOM (LS-23-90 Upper Root
Isolation)
06/22/2202
Corrective Action
Documents
Resulting from
Inspection
501000064180
Thermal Cycling Effects on MO-2035
06/22/2022
NH-36249
P&ID Steam Side High Pressure Coolant Injection System
Drawings
NH-36665 (M-
811)
P&ID Service Water System and Make-Up Intake Structure
107
Work Orders
700085070
Replacement Division 2 FSW Pipe
501000062285
Unexpected 11 Battery Ground Alarm
04/15/2022
Corrective Action
Documents
501000063307
RWCU leak
05/23/2022
Drawings
NH-36254 (M-
28)
P&ID Reactor Water Cleanup System
8006-01
Partial Condenser Isolation and Entry Procedure (Inner
Loop)
Procedures
8006-02
Partial Condenser Isolation and Entry Procedure (Outer
Loop)
700106976
05/23/2022
Work Orders
700107976
RHRSW Pump Replacement
501000062468
EDG FO Pumps Found Running, 12 EDG Inoperable
04/21/2022
501000063570
A ATWS Inverter Light is Out
06/01/2022
501000063699
RHRSW Pump Alert Range
06/09/2022
Corrective Action
Documents
501000063933
RHRSW Pump dp in Required Action Range
06/16/2022
NX-16162-1-10
ATWS Elementary Diagram Anticipated Transient Without
SCRAM Recirculation Pump Trip System
NX-16162-1-2
ATWS Elementary Diagram
Drawings
NX-16162-1-3
ATWS Elementary Diagram
Procedures
255-05-1A-1-1
A RHRSW Quarterly Pump and Valve Test
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
501000062640
EDG Overspeed Limit Switch Fail
04/27/2022
4106-01
Emergency Diesel 1 Cycle Maintenance
Procedures
OSP-EDG-0550-
Emergency Diesel Generator Consolidated Testing
700061183-0020
SW to V-EAC-14A Check Valve
Work Orders
700084768-01
Emergency Diesel Precision Maintenance Critical
Component
04/28/2022
Drawings
NH-36881 (M-
145)
Standby Gas Treatment Flow Diagram
0068
Spent Fuel Pool & Reactor Building Exhaust Plenum Monitor
Calibration
253-01
SBGT A Train Quarterly Test
Procedures
255-11-III-4
ESW Quarterly Pump and Valve Test
501000040374
ERO Pagers Not Activated by Callout System
05/07/2020
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
2/27/2021
501000061174
MNGP ANS Design Report Discrepancy
03/10/2022
501000061999
Potential Failure
04/06/2022
Corrective Action
Documents
501000062411
AC Power Disconnected from 2 PANS sirens
04/29/2022
Siren Testing and Maintenance Data
06/01/2021 -
04/30/2022
Annual PANS Performance Review Records
06/01/2020 -
05/31/2022
Miscellaneous
Alert and Notification System Design Report
700067305-0010
Semi-Annual Auto-Dialing Telephone Notification System
Testing and Maintenance Verification
10/23/2020
700075031-0010
Semi-Annual Auto-Dialing Telephone Notification System
Testing and Maintenance Verification
05/20/2021
Work Orders
700083271-0010
Semi-Annual Auto-Dialing Telephone Notification System
Testing and Maintenance Verification
10/13/2021
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
700091533-0010
Semi-Annual Auto-Dialing Telephone Notification System
Testing and Maintenance Verification
04/12/2022
MNGP 1359
Public Alert Notification Systems (PANS) Weekly Cancel
Signal Test and Monthly Activation Test
Procedures
MNGP 1408
Annual PANS Performance Review
501000040374
ERO Pagers Not Activated by Callout System
05/07/2020
Corrective Action
Documents
501000056704
ERO Position with Minimum Staff Qualified
10/04/2021
Monticello Nuclear Generating Plant On-Shift Staffing
Analysis
5A
ERO 4 Team Duty Roster
05/12/2022
ERO Training and Qualification Records (Sample -15
personnel)
06/15/2022
Miscellaneous
ERO Augmentation Drill Records
05/01/2020 -
03/31/2022
5790-102-04
Emergency Call List - NUE
105
5790-104-04
Emergency Call List - Alert/Site Area/General
133
A.2-001
Emergency Organization
A.2-10
Activation and Operation of the OSC
A.2-111
Activation and Operation of the Alternative Facilities During
a Security Threat
A.2-802
Activation and Operation of the EOF
FL-BEP
Fleet Emergency Plan Training Program Description
MNGP 1317
Emergency Alert Notification System Test
Procedures
MT-BEP
Monticello Emergency Plan Training Program Description
501000042396
EP HP Mini-Drill Critique Report
07/17/2020
501000045279
NUE Follow-up Actions
10/08/2020
501000046971
SCBA Bottles Needed by May 2021
2/08/2021
501000047766
Control Room Habitability Survey New Chemical
01/14/2021
501000048506
PA Speakers Making Buzzing Noise
2/08/2021
501000048867
PA Speakers 985 Non-Audible
2/19/2021
501000053100
Wide Range Gas Monitor Adverse Trend
06/11/2021
501000053359
Seals Missing from OSC Cabinet
06/22/2021
Corrective Action
Documents
501000053609
EP Drill-Procedure May Not Be Adequate
06/29/2021
Inspection
Procedure
Type
Designation
Description or Title
Revision or
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
Semi-Annual Auto-Dialing Telephone Notification System
Testing and Maintenance Verification Records
06/01/2020-
04/30/2022
EP Critique Report - 2020 EP Medical Drill
2/20/2020
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
Exercise
09/24/2021
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
Analysis -2020
10/26/202
KLD TR-505
Monticello Nuclear Generating Plant Evacuation Time
Estimate
Miscellaneous
QF0174-EP-2021
Nuclear Oversight Emergency Preparedness Annual
Evaluation; Emergency Preparedness Program Evaluation
(Fleet/MT/PI)
2/17/2021
Procedures
Monticello Nuclear Generating Plant Emergency Plan
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
1410
Semi-Annual Auto-Dialing Telephone Notification System
Testing and Maintenance Verification
FP-EP-SURV-05
Requirements for Annual Independent Review of EP
Program
MNGP 1225
Emergency Procedures Monthly Contact Verification
MNGP 1230
MNGP 1230
Procedures
5790-101-02
Emergency Action Level Matrix
Corrective Action
Documents
501000061365
Steam Jet Air Ejector Room Air Sample
03/16/2022
Miscellaneous
SCBA Test Results
2/23/2021
210122
Repair/Replace Reactor Water Cleanup Valves
Radiation Work
Permits (RWPs)
215509
Control Rod Drive Changeout
Corrective Action
Documents
501000049517
Unexpected Dose on Dosimeters
03/12/2021
Internal Dose Assessment
06/28/2021
Internal Dose Assessment
05/12/2021
Miscellaneous19-002
Technical Basis Document for the Sensitivity Study of
ARGOS 4/5, PM7 and GEM-5 Monitors
FP-RP-DP-01
Dosimetry Program
Procedures
FP-RP-IDA-01
Internal Dose Assessment
NRC Performance Indicator Data;
Emergency Preparedness - Drill/Exercise Performance;
3rd Quarter 2021 - 1st Quarter 2022
07/01/2021 -
03/31/2022
NRC Performance Indicator Data;
Emergency Preparedness - ERO Readiness
07/01/2021 -
03/31/2022
NRC Performance Indicator Data;
Emergency Preparedness - Alert and Notification System
07/01/2021 -
03/31/2022
QF0445
NRC and Data Collection and Submittal - Safety System
Functional Failures (April 2021 through March 2022)
Miscellaneous
QF0445
NRC Data Collection and Submittal - Reactor Coolant
System Total Leakage (April 2021 through March 2022)
71151
Procedures
FP-PA-PI-02
NRC and MOR Performance Indicator Reporting
16