IR 05000263/2022004
| ML23017A123 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 01/17/2023 |
| From: | Hironori Peterson NRC/RGN-III/DORS/RPB3 |
| To: | Domingos C Northern States Power Company, Minnesota |
| References | |
| IR 2022004 | |
| Download: ML23017A123 (1) | |
Text
SUBJECT:
MONTICELLO NUCLEAR GENERATING PLANT - INTEGRATED INSPECTION REPORT 05000263/2022004
Dear Christopher Domingos:
On December 31, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Monticello Nuclear Generating Plant. On January 12, 2023, 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 Reactor Projects Branch 3 Division of Operating Reactor Safety Docket No. 05000263 License No. DPR-22
Enclosure:
As stated
Inspection Report
Docket Number:
05000263
License Number:
Report Number:
Enterprise Identifier:
I-2022-004-0050
Licensee:
Northern States Power Company, Minnesota
Facility:
Monticello Nuclear Generating Plant
Location:
Monticello, MN
Inspection Dates:
October 01, 2022 to December 31, 2022
Inspectors:
A. Demeter, Project Engineer
G. Hansen, Senior Emergency Preparedness Inspector
T. Iskierka-Boggs, Senior Operations Engineer
J. Kutlesa, Emergency Preparedness Inspector
T. McGowan, Resident Inspector
V. Myers, Senior Health Physicist
C. Norton, Senior Resident Inspector
K. Pusateri, Resident Inspector
Approved By:
Hironori Peterson, Chief
Reactor Projects Branch 3
Division of Operating Reactor Safety
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
The unit began the inspection period at rated thermal power. On November 3, 2022, the unit was down powered to 81 percent as requested by transmission. The unit was returned to rated thermal power on November 3, 2022. On December 17, 2022, the unit was down powered to 94 percent to perform a control rod sequence exchange. The unit was returned to rated thermal power on December 17, 2022. The united remained at rated thermal power for the rest 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 winter for the following systems:
reactor building chillers, diesel fire pump, cooling towers, and heating boiler on October 20, 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)345 kilovolt (kV), 230 kV, and 115 kV substation on October 06, 2022 (2)11 emergency diesel generator (EDG) starting air and fuel oil systems prior to making 12 EDG inoperable for quarterly testing on October 25, 2022 (3)high pressure coolant injection system during reactor core isolation cooling (RCIC)system work window on November 15, 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 07-A, 125V division 1 battery room on October 03, 2022 (2)fire zone 07-B, 250V division 1 battery room on October 03, 2022 (3)fire zone 02-G, east shutdown cooling area on October 04, 2022 (4)fire zone 02-H, west shutdown cooling area on October 04, 2022 (5)fire zone 13-A, lube oil storage tank room on October 04, 2022
71111.07A - Heat Exchanger/Sink Performance
Annual Review (IP Section 03.01) (1 Sample)
The inspectors evaluated readiness and performance of:
- (1) 12 EDG heat exchanger
71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance
Requalification Examination Results (IP Section 03.03) (1 Sample)
- (1) The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating exam administered between October 31, 2022, and December 12, 2022. One operator failed the operating test scenario portion and will be remediated and reexamined during the first quarter of 2023 to meet CFR requirements for standing watch as a licensed operator.
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 an unplanned loss of the plant heating boiler on November 28, 2022.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated licensed operator requalification simulator examination on November 29, 2022.
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (1 Sample)
The inspectors evaluated the effectiveness of maintenance to ensure the following structures, systems, and components (SSCs) remain capable of performing their intended function:
(1)3-year review of 13 diesel generator
Quality Control (IP Section 03.02) (1 Sample)
The inspectors evaluated the effectiveness of maintenance and quality control activities to ensure the following SSC remains capable of performing its intended function:
(1)residual heat removal service water (RHRSW) pump 109B cable replacement on October 18, 2022
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (7 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)extended limiting condition for operation (LCO) for failure of 'B' control room emergency filtration train on October 21, 2022 (2)risk-informed completion time for replacement of division 2 emergency service water (ESW) pipe on November 1, 2022 (3)short term LCO planning during work on 11 standby liquid control pump on November 10, 2022, work order (WO) 700086593
- (4) Evaluation of cumulative risk associated with RCIC work window on November 14, 2022 (5)reviewed the rework to route the cable shield ground through the current transformer for the RHRSW P-109B on November 21, 2022 (6)risk-informed completion time for replacement of division 2 filtration service water (FSW) piping on December 1, 2022, WO 700103553
- (7) Reviewed planning and risk mitigation for the installation of MW-10B for tritium mitigation on December 15, 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)
===501000066931, door-142 excessive gap while pressurized (2)501000068506, P-109C, RHRSW pump cable not routed as designed (3)501000068634, steady steam plume from 'C' outboard MSIC (4)501000060255, 'G' safety relief valve discharge line temperature elevated
71111.18 - Plant Modifications
Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02)
=
- (1) The inspectors evaluated the temporary cooling installed for the MG set room per EC 601000003813.
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)division 2 emergency filtration train filter efficiency and leak tests after replacement of the charcoal canisters on October 21, 2022 (2)12 RHRSW pump following pump motor cable replacement on October 31, 2022 (3)division 2 ESW system following pipe replacement on November 3, 2022 (4)testing of pressure control valve PCV-4916A following replacement of an air pressure gauge for train 'A' outboard main steam isolation valve on November 8, 2022, WO 700082370-0020.
(5)leakage testing after replacement of division 2 FSW piping on December 2, 2022, WO 700103968 (6)11 RHRSW pump after P-109A motor feeder cable replacement on December 16, 2022, WO 700103553
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)reactor building to torus vacuum breaker operability check on October 12, 2022, WO 70080953 (2)14 ESW quarterly pump and valve testing after a portion of FSW piping was replaced on December 1, 2022, WO 700103968
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:
FT-2021-756, FP-S-FSIP-07 Revision, 10/27/2021
FT-2021-760, FP-EP-WI-24 Changes, 12/21/2021
MT-2021-755, A.2-410 Revision, 08/27/2021 MT-2021-761, Avaya Telephone Decommissioning, 12/08/2021
MT-2021-762, EP-TPD Revision 32, 12/07/2021
MT-2021-763, A.2-402 Revision, 12/22/2021
MT-2022-765, A.2-404 Revision, 12/17/2022
MT-2022-766, E-Plan Revision 56, 06/02/22
MT-2022-767, A.2-809 Revision, 04/11/2022 This evaluation does not constitute NRC approval.
71114.06 - Drill Evaluation
Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1 Sample)
(1)emergency response organization tabletop drill on October 18,
RADIATION SAFETY
71124.08 - Radioactive Solid Waste Processing & Radioactive Material Handling,
Storage, & Transportation
Radioactive Material Storage (IP Section 03.01)
The inspectors evaluated the licensees performance in controlling, labeling, and securing the following radioactive materials:
(1)radioactive material stored in warehouse 4 (2)radioactive material stored in the rotor storage building (3)radioactive material stored in the truck bay
Radioactive Waste System Walkdown (IP Section 03.02) (1 Sample)
The inspectors walked down the following accessible portions of the solid radioactive waste systems and evaluated system configuration and functionality:
(1)reactor water clean-up
Waste Characterization and Classification (IP Section 03.03) (3 Samples)
The inspectors evaluated the following characterization and classification of radioactive waste:
(1)reactor water clean-up resin for shipment 22-39 (2)condensate resin for shipment 21-69 (3)irradiated hardware for shipment 22-24
Shipping Records (IP Section 03.05) (3 Samples)
The inspectors evaluated the following non-excepted radioactive material shipments through a record review:
(1)shipment 22-39 for reactor water clean-up resin as a type B shipment (2)shipment 21-69 for condensate resin as an LSA-II shipment (3)shipment 22-24 for irradiated hardware as a type B shipment
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
MS09: Residual Heat Removal Systems (IP Section 02.08)===
- (1) October 1, 2021 through September 30, 2022
MS10: Cooling Water Support Systems (IP Section 02.09) (1 Sample)
- (1) October 1, 2021 through September 30, 2022 BI01: Reactor Coolant System (RCS) Specific Activity Sample (IP Section 02.10) (1 Sample)
- (1) July 1, 2021 through September 30, 2022
OR01: Occupational Exposure Control Effectiveness Sample (IP Section 02.15) (1 Sample)
- (1) July 1, 2021 through September 30, 2022 PR01: Radiological Effluent Technical Specifications/Offsite Dose Calculation Manual Radiological Effluent Occurrences (RETS/ODCM) Radiological Effluent Occurrences Sample (IP Section 02.16) (1 Sample)
- (1) July 1, 2021 through September 30,
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On January 12, 2023, the inspectors presented the integrated inspection results to C. Domingos, Site Vice President, and other members of the licensee staff.
On November 17, 2022, the inspectors presented the radiation protection inspection results to S. Hafen, Plant Manager, and other members of the licensee staff.
On December 5, 2022, the inspectors presented the emergency action level and emergency plan changes inspection results to K. Nyberg, 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
Procedures
1151
Winter Checklist
101
Drawings
NF-36298-1
Electrical Load Flow, One Line Diagram
118
2154-10
High Pressure Coolant Injection System Prestart Valve
Checklist
2154-14
Fuel Oil System Prestart Valve Checklist
Procedures
2154-28
Diesel Generator Airstart System Prestart Valve Checklist
Strategy A.3-02-G
East Shutdown Cooling Area
Strategy A.3-02-H
West Shutdown Cooling Area
Strategy A.3-07-A
25 Volt Division 1 Battery Room
Strategy A.3-07-B
250 Volt Division 1 Battery Room
Fire Plans
Strategy A.3-13-A
Lube Oil Storage Tank Room
Procedures
0187-02A
Emergency Diesel Generator/12 Emergency Service
Water Comprehensive Pump and Valve Tests
Miscellaneous
22 MNGP
Annual LORT
Exam Summary
Results
22 Annual Licensed Operator Requalification Operating
Test examination results for Monticello Nuclear Generating
Plant
2/12/2022
Miscellaneous
SEG RQ-SS-182
Loss of Torus Inventory Requiring Blowdown
C.4-B.08.03A
Loss of Heating Boiler
Procedures
C.4-B.08.07A
Ventilation System Failure
501000023118
DG/52-710 Locked Out
2/13/2019
501000053295
NDG Overheat During 1374 Load Test
06/28/2021
Corrective Action
Documents
501000067395
NOS: P-109B Motor Lead Degraded
10/18/2022
Work Orders
7000103553-
0190
P-109B/MTR-Remove Cable A608-M608/1 Between
Switchgear and Motor
10/18/2022
501000067517
Failed Freon Filter Test
10/19/2022
501000068609
RHRSW P-109B Shielded Ground Cable
11/18/2022
Corrective Action
Documents
501000068885
Incorrect Manufacturer Heat Number on Received Piping (In
Support of FSW Piping Replacement Project)
11/30/2022
Drawings
NF-93493 (Isol
Drawing of Div 2
FSW Piping)
S.W. Supply Line from Pump-111D to VEAC-14B (Turbine
Building)
C
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Engineering
Changes
601000004126
Outside Monitoring Wells Installed 2022
Weekly PRA Schedule Evaluation (11/6/2022 - 11/12/2022)
11/01/2022
Weekly PRA Schedule Evaluation (11/13/2022 - 11/19/2022)
11/08/2022
FP-OP-PEQ-01
Protected Equipment Log for RCIC Work Window
11/13/2022
Miscellaneous
QF1132 (FP-OP-
PEQ-01)
Protected Equipment Work Approval Form for Repair of Oil
Leak on 11 Standby Liquid Control Pump
11/09/2022
Procedures
QF0930 (FP-PE-
WLD-10)
Weld Control Record
7000117104
Excavation Permit
2/08/2022
Work Orders
700064444-0090
FSW, Install New Pipe and Supports
501000060255
SRV 'G' Discharge Line Temp Elevated
2/01/2022
501000064784
'B' SRV Intermittent Tail Pipe Temp Spike
07/18/2022
50100006484
'G' SRV Approaching Alarm Setpoint
07/19/2022
501000066625
'G' SRV ACMP Threshold Value Exceeded
09/22/2022
501000066931
Door-142 Excessive Gap While Pressurized
10/04/2022
501000067321
'G' SRV Tailpipe Temp Exceeded ACMP
10/16/2022
501000068043
'G' SRV Tailpipe Temp Met ACMP Threshold
11/02/2022
501000068253
'B' SRV Tailpipe Temperature Step Change
11/06/2022
501000068506
RHRSW P-109C Cable Shield Not Routed as Designed
11/16/2022
Corrective Action
Documents
501000068634
Steady Steam Plume from 'C' MSIV
11/18/2022
Procedures
2000005747
ODMI for Monitoring 'G' SRV Tailpipe Temperatures
11/17/2022
501000063428
V-SF-4 Belts are no Longer on Pulleys
05/28/2022
Corrective Action
Documents
501000063794
MG Set Rm Cooling Ideas
06/12/2022
Engineering
Changes
601000003813
Temporary Cooling for MG Set Room
501000068339
During 0051, PCI084 doesn't Display RSET
11/08/2022
Corrective Action
Documents
501000068352
DPIS-2-117B out of As Found
11/08/2022
Miscellaneous
Field Change
Request 0001
Temporary Chiller Power Weld Receptacle N1419B Fuses
for EC Number 601000003813
0051
Main Steam Line High Flow Group I Instrument Test
Procedures
255-05-IA-1-1
'A' RHRSW Quarterly Pump and Valve Tests (Marked Up
Procedure Performed as PMT for 11 RHRSW Pump Motor
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Cable Replacement)
255-05-IA-1-2
B RHRSW Quarterly Pump and Valve Tests (Marked Up
Procedure Performed as PMT for 12 RHRSW Pump Motor
Cable Replacement)
91B
255-11-IIC-2
Emergency Service Water System Leakage Test, Loop 'B'
0466-02
B EFT Filter Efficiency and Leak Tests
700064444
MT Replace Division 2 FSW Pipe
11/02/2022
700082370
Replace Pressure Gauge For PCV-4916A
11/08/2022
Work Orders
700103553-0150
RHRSW Pump (PMT/RTS)
2/16/2022
0141
Reactor Building to Torus Vacuum Breaker Operability
Check
Procedures
255-11-III-4
ESW Quarterly Pump and Valve Tests
FT-2021-756
FP-S-FSIP-07 Revision
10/27/2021
FT-2021-760
FP-EP-WI-24 Changes
2/21/2021
MT-2021-755
A.2-410 Revision
08/27/2021
MT-2021-761
Avaya Telephone Decommissioning
2/08/2021
MT-2021-7621
EP-TPD Revision 32
2/07/2021
MT-2021-763
A.2-402 Revision
2/22/2021
MT-2022-765
A.2-404 Revision
2/17/2021
MT-2022-766
E-Plan Revision 56
06/02/2022
Miscellaneous
MT-2022-767
A.2-809 Revision
04/11/2022
A.2-402
On-Site Radiological Monitoring
A.2-404
Emergency Air Sampling and Analysis
A.2-410
Out of Plant Surveys
A.2-809
EOF Security
Procedures
Miscellaneous
2B
MT Tabletop
501000056905
Resin Liner RDS-1000 Overfilled
10/07/2021
Corrective Action
Documents
501000061395
Limited Quantity RAM Shipped as Exempt
10/18/2021
501000068509
NRC Comments Regarding Shipment 21-69
11/14/2022
Corrective Action
Documents
Resulting from
501000068557
NRC: License Verification Not Updated
11/16/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Inspection
DAC-0570
MNGP Activated Hardware Characterization
L92559-2
Vendor Analysis Report for T-34B
07/23/2021
L96114-3
Vendor Analysis Report for T-36A
06/08/2022
Miscellaneous
L96114-4
Vendor Analysis Report for T-36B
06/08/2022
FP-RP-NISP-04
Radiological Posting and Labeling
FP-RP-RW-02
Radioactive Shipping Procedure
FP-RP-RW-05
Type B Radioactive Shipments
FP-RP-RW-06
Create Radioactive Packages Using Radman
Procedures
R.11.07
Sampling and Analysis of Radioactive Resins
21-69
Condensate Resin Shipment
10/26/2021
2-24
Irradiated Hardware Shipment
06/21/2022
Shipping Records
2-39
Reactor Water Clean-Up Resin Shipment
09/27/2022
Miscellaneous
MSPI QF0445
Packet
NRC and MOR Data Collection and Submittal Form
(FP-R-PI-01); Review of MS09, MS10, and BI01 data
(uploaded in CERTREC)
11/18/2022
71151
Procedures
FP-R-PI-01
Preparation of NRC Performance Indicators
10