IR 05000263/2024010
| ML24131A123 | |
| Person / Time | |
|---|---|
| Site: | Monticello  |
| Issue date: | 05/13/2024 |
| From: | Sanchez Santiago E NRC/RGN-III/DORS/EB1 |
| To: | Hafen S Northern States Power Company, Minnesota |
| References | |
| IR 2024010 | |
| Download: ML24131A123 (1) | |
Text
SUBJECT:
MONTICELLO NUCLEAR GENERATING PLANT - AGE-RELATED DEGRADATION INSPECTION REPORT 05000263/2024010
Dear Shawn Hafen:
On April 4, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Monticello Nuclear Generating Plant and 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, Elba M. Sanchez Santiago, Acting Branch Chief Engineering Branch 1 Division of Operating Reactor Safety Docket No. 05000263 License No. DPR-22 Enclosure:
As stated Distribution via LISTSERV May 13, 2024 Signed by Sanchez Santiago, Elba on 05/13/24
SUNSI Review
Non-Sensitive
Sensitive
Publicly Available
Non-Publicly Available OFFICE RIII RIII NAME TBriley:gmp ESanchez Santiago DATE 05/13/2024 05/13/2024
Enclosure U.S. NUCLEAR REGULATORY COMMISSION
Inspection Report
Docket Number:
05000263
License Number:
Report Number:
Enterprise Identifier:
I-2024-010-0036
Licensee:
Northern States Power Company, Minnesota
Facility:
Monticello Nuclear Generating Plant
Location:
Monticello, MN
Inspection Dates:
March 11, 2024 to March 29, 2024
Inspectors:
T. Briley, Technical Support Team Leader
I. Hafeez, Senior Reactor Inspector
M. Siddiqui, Reactor Inspector
A. Valiaveedu, Reactor Sys Engineer
Approved By:
Elba M. Sanchez Santiago, Acting Branch Chief
Engineering Branch 1
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an Age-Related Degradation 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.
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 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
71111.21N.04 - Age-Related Degradation Age-Related Degradation
The inspectors selected a sample of components and structures to verify that engineering performance and maintenance activities addressed age-related degradation and that problems were appropriately identified, addressed, and corrected.
Samples were selected considering risk insights and the potential for degradation.
Specifically, the inspectors selected samples that were risk-significant and either had indications of age-related degradation or were exposed to environments that could cause age-related degradation. The inspectors considered site-specific and industry-wide operating experience to identify samples and included both active and passive sub-components within each component or structure.
For each selected sample listed below, the inspectors reviewed the licensees engineering and maintenance activities credited to address age-related degradation to assess whether they were being performed using applicable standards and procedures, evaluated against appropriate acceptance criteria, and that maintenance and condition monitoring was completed at an appropriate interval. The inspectors also assessed whether issues identified during licensee activities were being entered into and addressed by the applicable station processes including the corrective action program, and whether periodic assessments of maintenance effectiveness and operating experience were being completed, including feedback and process adjustments.
- (1) General Electric (GE) Magne Blast Breakers (Type AMH) - Bus 15 and 16
- (2) GE Time Overcurrent Relays and Protective Schemes - Bus 15 and 16
- (3) Reactor Protection System Motor Generator Sets
- (4) Medium Voltage Cables (Safety-Related 4160 volt)
- (5) High Pressure Coolant Injection Lubricating Oil System
- (6) Emergency Diesel Generator 11 and 12 Fuel Oil Systems
- (7) Hydraulic Snubber RV-26A-N2
- (8) Emergency Diesel Generator 12 Lubricating Oil System
- (9) Flood Doors 201 and 202 (Lower 4 Kilovolt Room Barriers)
- (10) Reactor Water Cleanup Non-Regenerative Heat Exchanger
- (11) Refuel Floor Area Radiation Monitors
- (12) Torus Coating
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 4, 2024, the inspectors presented the Age-Related Degradation Inspection results to Shawn Hafen and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
01082766
Numerous Small Areas of the Containment Interior
Coatings Did Not Meet the Inspection Procedure
Acceptance Criteria
09/17/2007
278920
Numerous Small Areas of PCT Coatings Failed
Acceptance Criteria
04/22/2012
01378342
0135/0140/1367/1132/0515/1368/IWE Inspection Results
04/10/2013
500001375234
Snubber at RV-26A-N2 Cold Setting is Below Allowed
Minimum
03/18/2013
500001482437
Cooling Capability of RWCU NRHX Being Challenged
06/10/2015
501000011954
EDG Low Oil Level
05/14/2018
501000023935
Discontinued Mobiltemp 78 Grease
03/07/2019
501000024419
MR A(1) Determination Needed for Deferral
03/18/2019
501000024680
Isolation Required to be Returned
03/24/2019
501000037836
MO-2009 Disconnected Motor Lead
2/17/2020
501000046702
Oil Slightly Low on 12 EDG
11/24/2020
501000047695
EDG Fuel Oil Weepage
01/12/2021
501000054532
EDG Crankcase Low Oil Level <-4"
07/28/2021
501000069127
Pre Outage Snubber WOs Challenged
2/08/2022
501000072747
RV-26A-N2 Piston Rod Extension Below Min
04/24/2023
Corrective Action
Documents
501000081129
Snubber Return to Stock Issue
01/23/2024
501000081403
L-44 Panel Door Open
01/29/2024
501000082461
Vendor Coatings Procedure Not Updated
03/01/2024
501000082542
Lisega Snubber VTM Not in Records
03/03/2024
501000082737
ARD-2024 Difficulty Locating Documents
03/12/2024
501000082872
24-ARD 0140 Procedure Clarification
03/14/2024
501000082893
24-ARD Missing 2013 Vendor Report
03/18/2024
501000082972
ARD-2024 Incomplete WO
03/18/2024
501000082993
24 ARD Unclear Basis for TS SR 3.8.3
03/18/2024
501000083002
ARD 2024 - STRIDE Question
03/19/2024
501000083013
ARD 2024 - Delayed Response Time
03/18/2024
71111.21N.04
Corrective Action
Documents
Resulting from
Inspection
501000083091
Relay Replacement PM Missed Scope
03/20/2024
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
501000083289
ARD-2024 Missed WO Sign-Off
03/25/2024
501000083313
Negative Trend in Records Quality
03/26/2024
501000083316
ARD 2924 Torus Coatings
03/25/2024
501000083338
24 ARD - HPCI Oil Leaks
03/27/2024
501000083354
24 ARD - Door Seal is Damaged
03/27/2024
501000083382
24 ARD - Door Sealing Surface Corroded
03/27/2024
501000083383
24 ARD - FE Flange Surface Corrosion
03/27/2024
501000083392
24 ARD - EDG Crankcase Excess Sealant
03/27/2024
501000083421
ARD 2024 Process Issue
03/28/2024
501000083579
QA Question: 152-501/601 Protective Relay
03/31/2024
501000083735
ARD-2024 Inspector Observations/Exit
04/04/2024
E-502
Electrical Device Table
B
NF-36298-1
Electrical Load Flow One Line Diagram
21
NF-36319
Door Schedule
NF-36319-1
Door Schedule
NF-36319-2
Door Schedule
Drawings
NH-36254
Reactor Water Cleanup System
16423
Engineering
Changes
2180
Evaluation of RFO-26 Coatings / IWE Inspection Results
EQ-A
EQ Central File Part A Equipment Master List
JKS-87-077
Evaluation of Snubber Lockup and Bleed Rates for
Snubbers on the Safety Relief Valve Piping System
11/23/1987
M.I. 1750
Diesel Fuel Recommendations All EMD and Former
CDED Engines
J
M.I. 1752
Lubricating Oil Specifications Diesel Engine and
Governor - EMD and CDED
E
NSPE-12-7023
Primary Containment Coating Inspection Test Results
Package
2/22/1988
NUC2019106
[Proprietary]
Suppression Chamber Nuclear Diving IWE & IWF
Examinations, Coating Inspection & Coating Repair 1R29
(RFO-29)
06/28/2019
Miscellaneous
NUC2300001-L-
CAR-001
MNGP Drywell, Drywell Head, Interior Vent Header, Torus
Vapor Area Coating
06/22/2023
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
[Proprietary]
NUC2300001-L-
SPREADSHEET-
001
UESI QA Record RFO31
05/10/2023
NX-9216-7
999 System Generating Plant
PRA-MT-SY-DO
Diesel Oil System Notebook
5.1
PRA-MT-SY-
High Pressure Coolant Injection System Notebook
5.1
0140
Drywell Interior Surface Inspection
0192
Diesel Fuel Quality Check
0331
Snubber Records Review
0515
Primary Containment Visual Examination for Structural
Problems
24
Area Radiation Monitor Calibration
25-A
Area Radiation Monitor Functional
AWI-08.11.03
Nuclear Coatings Program
CD 5.34
Safety-Related Coatings Standard
EWI-08.02.01
Snubber Program
EWI-08.07.01
Thermal Fatigue Monitoring Program
EWI-11.01.31
Protective Coating Monitoring and Maintenance Program
FG-OP-OL-02
Prompt Operability Determinations (POD) and Past
Operability Reviews (POR)
FP-E-MR-01
Maintenance Rule Process
FP-E-MR-03
Maintenance Rule Monitoring
FP-G-RM-01
Quality Assurance Records Control
FP-PA-ARP-01
CAP Process
FP-PE-SNUB-01
Snubber Program
MPS-0049
Monticello Fuel Oil Specification
NSP-DOL-0598
Diesel Fuel Oil Tank Inspections
Monticello Surveillance Test Intervals
Procedures
UESI Procedure
QCP-10-2-MNGP
[Proprietary]
Underwater Coating Repair
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
00453355
T-44, Cleaning, and Internal Visual Inspection
03/17/2013
25232
T-45B, Clean and Inspection 12 EDG Fuel Oil Day Tank
2/15/2007
357188
T-45A, Clean and Inspect Day Tank
03/19/2009
20960
EPRO - G-3B, Take Ultrasonic Thickness Measurements
11/02/2011
550245-01
T-45B, Perform Internal Visual Inspection
01/23/2017
2645-01
T-45A, Perform Internal Visual Inspection
01/10/2017
700025543
PM E-206 Clean HPCI Lube Oil Cooler
04/22/2019
700025645
PM E-206 Eddy HPCI Lube Oil Cooler
04/22/2019
700054304
Perform RWCU System Aging Management Walkdown
RFO30
04/23/2021
700054473
QIM_501000025970_4KVB-02 Acrid Odor from Charging
Motor
08/07/2020
700058159
Routine Lubrication and/or Oil Sampling
06/22/2021
700065488
G-3B Base Tank NDE UT Measurements
04/26/2022
700071751
P-217, Perform 4114-PM
03/21/2022
700086622
Emergency Diesel Generator / 12 ESW Monthly Pump
and Valve Tests
06/26/2021
700087248
Diesel Fuel Oil Tank Inspections
04/20/2023
700087476
Emergency Diesel Generator / 12 ESW Quarterly
Pump and Valve Tests
07/27/2021
700092256
Sample Oil and Change as Required on P-209, Grease
P-212
06/19/2023
700092992
RFO31 RWCU System Walkdown Observation
04/20/2023
700093793
Snubber Examination
2/07/2023
700105181
MST Support for 20 KIP Snubber
05/01/2023
700109710
Underground Storage Tank Monitoring
08/01/2023
700113647
Underground Storage Tank Monitoring
10/27/2023
700118612-10
Underground Storage Tank Liquid Level Correlation
03/23/2023
700123601
HPCI Quarterly Pump and Valve Tests
09/18/2023
700128867
Diesel Fuel Quality Check
700130862
Aboveground Storage Tank Inspection
2/25/2024
Work Orders
700133673
Fuel Oil Receiving Quality Check
11/15/2023