IR 05000483/2024001
| ML24102A027 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 04/16/2024 |
| From: | Greg Werner NRC/RGN-IV/DORS/PBB |
| To: | Diya F Ameren Missouri |
| Proulx D | |
| References | |
| EPID L-2024-001-0000 IR 2024001 | |
| Download: ML24102A027 (13) | |
Text
April 16, 2024
SUBJECT:
CALLAWAY PLANT - INTEGRATED INSPECTION REPORT 05000483/2024001
Dear Fadi Diya:
On March 31, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Callaway Plant. On April 10, 2024, the NRC inspectors discussed the results of this inspection with John Beck, Vice President of Nuclear Engineering, 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, Gregory E. Werner, Chief Reactor Projects Branch B Division of Operating Reactor Safety Docket No. 05000483 License No. NPF-30
Enclosure:
As stated
Inspection Report
Docket Number:
05000483
License Number:
Report Number:
Enterprise Identifier:
I-2024-001-0000
Licensee:
Ameren Missouri
Facility:
Callaway Plant
Location:
Steedman, MO
Inspection Dates:
January 1 to March 31, 2024
Inspectors:
N. Brown, Acting Senior Resident Inspector
S. Schwind, Technical Assistant
Approved By:
Gregory E. Werner, Chief
Reactor Projects Branch B
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at the Callaway 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 Callaway plant began the inspection period at rated thermal power. On February 15, 2024, a turbine trip occurred, followed by a reactor trip. A faulted unit auxiliary transformer surge capacitor bushing was found and replaced. The unit was brought critical February 18 and entered Mode 1. On February 19 while bringing the main turbine online it experienced high vibrations and operators had to manually trip the main turbine. Operators maintained the unit at approximately 8 percent power until the main turbine was brought online February 21 at which point operators began power ascension and reached rated thermal power on February 22. The unit operated at or near 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
71111.04 - 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)containment spray train A on January 17, 2024 (2)essential service water train A on March 13, 2024 (3)train B swing inverter NN18 on March 11, 2024
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 area D-2 emergency diesel generator B, room 5201 on January 2, 2024 (2)fire area A-16 component cooling water A and B and heat exchanger area, rooms 1401 and 1406, on January 8, 2024 (3)fire areas A-17 and A-18, electrical penetration rooms A and B, rooms 1409 and 1410, on January 8, 2024 (4)fire area A-1, auxiliary building general area 1974', rooms 1101, 1102, 1120, 1121, 1122 and 1130 on February 26, 2024 (5)fire area A-2, safety injection and charging pump rooms A, rooms 1113 and 1114, on February 26, 2024
71111.06 - Flood Protection Measures
Flooding Sample (IP Section 03.01) (1 Sample)
- (1) The inspectors evaluated internal flooding mitigation protections in the auxiliary building on January 18, 2024.
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 surveillance testing and routine operations on March 19, 2024.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated emergency action level exercises on March 7, 2024.
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 remain capable of performing their intended function:
(1)component cooling water pump discharge check valve EGV0016 D on January 8, 2024
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (5 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)emergency diesel generator A exhaust leak troubleshooting on January 17, 2024 (2)essential service water B strainer on January 26, 2024 (3)through-wall leak in component cooling water A heat exchanger essential service water drain line, February 6, 2024 (4)plant trip and emergent issues on February 18, 2024 (5)essential service water B maintenance risk informed completion time on February 29, 2024
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)component cooling water A minimum wall thickness on January 8, 2024 (2)emergency diesel generator A jacket water bolting on January 19, 2024 (3)north electrical penetration room cooler SGL15A on February 1, 2024 (4)safety injection accumulator C check valve BB8948C on February 28, 2024 (5)door seal gap DSK 36092 on March 11, 2024
71111.18 - Plant Modifications
Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (2 Samples)
The inspectors evaluated the following temporary or permanent modifications:
(1)essential service water pipe replacement on January 8, 2024 (2)safety related cooler/fan modifications on February 26, 2024
71111.24 - Testing and Maintenance of Equipment Important to Risk
The inspectors evaluated the following testing and maintenance activities to verify system operability and/or functionality:
Post-Maintenance Testing (PMT) (IP Section 03.01) (5 Samples)
(1)feedwater isolation valve D rupture disk replacement on January 4, 2024 (2)emergency diesel generator A exhaust leak troubleshooting on January 18, 2024 (3)control room air conditioning system B SGK04B on January 26, 2024 (4)essential service water B strainer on January 26, 2024 (5)through-wall leak repair in the component cooling water A heat exchanger essential service water drain line, February 6, 2024
Surveillance Testing (IP Section 03.01) (2 Samples)
(1)monthly testing of emergency diesel generator B on January 3, 2024
- (2) control room A air conditioning 18-month surveillance test on February 8, 2024
71114.06 - Drill Evaluation
Additional Drill and/or Training Evolution (2 Samples)
The inspectors evaluated:
(1)team 4 emergency response organization training drill on January 11, 2024 (2)team 5 emergency response organization training drill on January 18,
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
MS06: Emergency AC Power Systems (IP Section 02.05)===
- (1) January 2023 through December 2023
MS10: Cooling Water Support Systems (IP Section 02.09) (1 Sample)
- (1) January 2023 through December 2023 BI01: Reactor Coolant System (RCS) Specific Activity Sample (IP Section 02.10) (1 Sample)
- (1) January 2023 through December 2023
BI02: RCS Leak Rate Sample (IP Section 02.11) (1 Sample)
- (1) January 2023 through December 2023
71152A - Annual Follow-up Problem Identification and Resolution Annual Follow-up of Selected Issues (Section 03.03)
The inspectors reviewed the licensees implementation of its corrective action program related to the following issue:
(1)check valve BB8948C failed to seat during OSP-BB-VL006, on March 31, 2024
71153 - Follow Up of Events and Notices of Enforcement Discretion Personnel Performance (IP Section 03.03)
- (1) The inspectors evaluated turbine and reactor trip response on February 15, 2024.
Reporting (IP Section 03.05) (1 Sample)
The inspectors evaluated the 50.72 event report of the following issue:
- (1) turbine-driven auxiliary feedwater pump auto start on March 28,
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 10, 2024, the inspectors presented the integrated inspection results to John Beck, Vice President of Nuclear Engineering, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
Condition Reports
2401749
Procedures
OTN-EF-00001,
CL0003
Normal Valve Lineup Essential Service Water Pump House
Train A
Procedures
OTN-EN-00001,
CL0002
Containment Spray System Normal Valve Lineup
Procedures
OTN-NN-00002,
Addendum 2
NN18 B Train Inverter In Service Verification
Calculations
KC-150
Fire Safety Analysis Calculation: KC-150 Fire Area: D-2
Diesel Generator B, Diesel Generator Building
Elevation 2000
Engineering
Evaluations
KC-52
Detailed Fire Modeling Report Fire Compartment: A-17
Electrical Penetration Room B, Auxiliary Building,
Elevation 2026'
Engineering
Evaluations
KC-53
Detailed Fire Modeling Report Fire Compartment: A-18
Electrical Penetration Room A, Auxiliary Building,
Elevation 2026'
Fire Plans
Fire Preplan
Manual
Procedures
OTO-KC-00001,
Addendum A-01
Auxiliary Building 1974' - General Area
Procedures
OTO-KC-00001,
Addendum A-16
Auxiliary Building 2026' - General Area
Procedures
OTO-KC-00001,
Addendum A-17
Auxiliary Building 2026' - South Electrical Penetration Room
Procedures
OTO-KC-00001,
Addendum A-18
Auxiliary Building 2026' - North Electrical Penetration Room
Procedures
OTO-KC-00001,
Addendum D-02
Diesel Generator Building 2000' - 'B' Diesel Generator Room
Procedures
OTO-KC-0001,
Addendum A-02
Auxiliary Building - 1974' Train 'A' ECCS Pump Rooms
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
Condition Reports
201402680, 202400404
Miscellaneous
ULDBD-FLOOD-
001
Topical Area - Internal Flooding
Miscellaneous
T61.0810 8
EAL Exercises
2/09/2024
Procedures
APA-ZZ-00003
Shift Relief and Turnover
Procedures
ODP-ZZ-00001,
Addendum 1
Annunciator Response
Corrective Action
Documents
Condition Reports
2202985
Miscellaneous
Bolting Manual
Miscellaneous
OQCM
Operational Quality Control Manual
Work Orders
Jobs
201934
Corrective Action
Documents
Condition Reports
2001790, 202307764, 202400556, 202400664,
2400845, 202401065, 202401089, 202401134,
2401145, 202401164, 202401177, 202401213,
2401217, 202401255, 202401258
Miscellaneous
Summary of the Weekly Schedule
01/11/2024
Miscellaneous
RICT-2024-01
Miscellaneous
RICT-2024-0226
Procedures
APA-ZZ-00315,
Appendix D
Risk Informed Completion Time (RICT) Program
Work Orders
Jobs
18001654, 24000408
Corrective Action
Documents
Condition Reports
2302380, 202400119, 202400391, 202000586,
2400593, 202400602, 202400673, 202400788
2400915, 202401634
Drawings
M-018-00309
Emergency Diesel Generator System
154
Procedures
APA-ZZ-00750
Hazard Barrier Program
Procedures
EDP-ZZ-01121
Raw Water System Predictive Performance Program
Work Orders
Jobs
2506696, 18001654, 23503549
Corrective Action
Documents
Condition Reports
2307723, 202400566
Engineering
Changes
MP 21-0011
RFR 210038 - Modification Request for Speed Changes for
Safety Related Belt Driven Fans
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Engineering
Changes
MP 23-0039
Replace Section of EF-7-HBC Spool 4 with Stainless Steel
Engineering
Evaluations
EF-5069-SCD
Essential Service Water (EF) System Categorization
Document
Procedures
APA-ZZ-05069
CFR 50.69 Program Categorization and Alternative
Treatment
Work Orders
Jobs
23002810
Corrective Action
Documents
Condition Reports
2400373, 202400391, 202400409, 202400469,
2400497, 202400556, 202400939
Miscellaneous
Summary of the Weekly Schedule
01/11/2024
Procedures
APA-ZZ-00322,
Appendix E
Post-Maintenance Test Program
Procedures
APA-ZZ-00661
Administration of Welding
Procedures
MSE-GK-0004A
Refrigeration Cycle and Air Flow for SGK04A
Procedures
MSM-ZZ-QV004
Rupture Disc Replacement for FWIV and MSIV
Procedures
Standby Diesel Generator A Periodic Tests
Procedures
Standby Diesel Generator B Periodic Tests
Work Orders
Jobs
19507350, 18001654, 24000408, 22509342, 20512567,
23514351, 23002086, 22508560
Miscellaneous
24 EP WRO Training Drill Scenario
71151
Miscellaneous
Cooling Water Systems Performance Indicator Data for
January 2023 through December 2023
71151
Miscellaneous
Reactor Coolant System Specific Activity Performance
Indicator Data for January 2023 through December 2023
71151
Miscellaneous
Reactor Coolant System Leakage Performance Indicator
Data for January 2023 through December 2023
71151
Miscellaneous
Emergency AC Power Systems Performance Indicator Data
for January 2023 through December 2023
Corrective Action
Documents
Condition Reports
2203677, 202203737, 202307958, 202308035,
2308066, 202308073, 202308090, 202308108,
2308132, 202308194, 202308302, 202308315,
2308831, 202308855, 202308977, 202309098
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
Condition Reports
2001790, 202301129, 202307764, 202400816,
2401065, 202401089, 202401134, 202401137,
2401145, 202401164, 202401177, 202401213,
2401217, 202401255, 202401258, 202402078,
2402247
Procedures
OTG-ZZ-00008
Normal Unit Recovery Guideline Following Reactor Trip
24