IR 05000237/2023002
| ML23219A104 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/08/2023 |
| From: | Robert Ruiz NRC/RGN-III/DORS/RPB1 |
| To: | Rhoades D Constellation Energy Generation, Constellation Nuclear |
| References | |
| EPID I?2023?002-0053 IR 2023002 | |
| Download: ML23219A104 (22) | |
Text
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3-INTEGRATED INSPECTION REPORT 05000237/2023002 AND 05000249/2023002
Dear David Rhoades:
On June 30, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Dresden Nuclear Power Station, Units 2 and 3. On July 26, 2023, the NRC inspectors discussed the results of this inspection with P. Boyle, Site Vice President, 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, Robert Ruiz, Chief Reactor Projects Branch 1 Division of Operating Reactor Safety Docket Nos. 05000237 and 05000249 License Nos. DPR-19 and DPR-25
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000237 and 05000249
License Numbers:
Report Numbers:
05000237/2023002 and 05000249/2023002
Enterprise Identifier:
I2023002-0053
Licensee:
Constellation Energy Generation, LLC
Facility:
Dresden Nuclear Power Station, Units 2 and 3
Location:
Morris, IL
Inspection Dates:
April 01, 2023 to June 30, 2023
Inspectors:
J. Nance, Operations Engineer
M. Porfirio, Illinois Emergency Management Agency
G. Roach, Senior Operations Engineer
N. Shah, Senior Project Engineer
M. Siddiqui, Reactor Inspector
C. St. Peters, Resident Inspector
J. Steffes, Senior Resident Inspector
Approved By:
Robert Ruiz, Chief
Reactor Projects Branch 1
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Dresden Nuclear Power Station, Units 2 and 3, 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
Unit 2 began the inspection period at rated thermal power. On April 25, 2023, the unit was shut down to perform replacement of the 2A recirculation pump seal. Following replacement and retest, the unit was synchronized to the grid on April 28, 2023, with full power achieved that same day. On May 12, 2023, the licensee discovered the 2/3 F lift pump in a tripped condition.
The licensee reduced power to approximately 94 percent in order to troubleshoot and perform maintenance on the 2/3 F lift pump. The unit was returned to full power operations on May 13, 2023. On May 21, 2023, power was reduced to approximately 83 percent to perform routine rod sequence exchange and surveillance testing. The unit was returned to full power the same day and remained at or near full power for the remainder of the inspection period.
Unit 3 began the inspection period at rated thermal power. On April 21, 2023, the unit was shut down to perform replacement of the 3A recirculation pump seal. Following replacement and retest, the unit was synchronized to the grid on April 24, 2023, with full power achieved that same day. On May 12, 2023, the licensee discovered the 2/3 F lift pump in a tripped condition.
The licensee reduced power to approximately 91 percent in order to troubleshoot and perform maintenance on the 2/3 F lift pump. The unit was returned to full power operations on May 13, 2023. On May 26, 2023, power was reduced to approximately 17 percent in order to facilitate repairs to channel one of the automatic voltage regulator system. During repair activities the licensee caused a loss of channel two, a complete loss of the automatic voltage regulator system and subsequent generator trip. The reactor remained online at approximately 17 percent power. The licensee replaced both channels of automatic voltage regulator and synchronized the generator to the grid on May 17, 2023. The unit was returned to full power the same day and remained at or near full 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 onsite 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 extreme hot weather for the following systems:
service water, reactor building closed cooling water (RBCCW), turbine building closed cooling water, containment cooling service water, and the emergency diesel generators (EDGs) and auxiliaries on June 01, 2023
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (4 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) 11.1.1, Unit 3 southwest corner room elev. 476' on May 18, 2023
- (2) FZ 8.2.2A Unit 2 containment cooling service water pumps elev. 495' on May 12-22, 2023
- (3) FZ 8.2.5E Unit 3 reactor feed pumps and track way area elev. 517' on May 25-26, 2023
- (4) FZ 9.0.B Unit 3 EDG elev. 517' on May 26, 2023
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 May 3, 2023, and June 2, 2023
71111.11B - Licensed Operator Requalification Program and Licensed Operator Performance
Licensed Operator Requalification Program (IP Section 03.04) (1 Sample)
- (1) Biennial Requalification Written Examinations The inspectors evaluated the quality of the licensed operator biennial requalification written examination administered on June 1, 2023.
Annual Requalification Operating Tests The inspectors evaluated the adequacy of the facility licensees annual requalification operating test.
Administration of an Annual Requalification Operating Test The inspectors evaluated the effectiveness of the facility licensee in administering requalification operating tests required by 10 CFR 55.59(a)(2) and that the facility licensee is effectively evaluating their licensed operators for mastery of training objectives.
Requalification Examination Security The inspectors evaluated the ability of the facility licensee to safeguard examination material, such that the examination is not compromised.
Remedial Training and Reexaminations The inspectors evaluated the effectiveness of remedial training conducted by the licensee and reviewed the adequacy of reexaminations for licensed operators who did not pass a required requalification examination.
Operator License Conditions The inspectors evaluated the licensees program for ensuring that licensed operators meet the conditions of their licenses.
Control Room Simulator The inspectors evaluated the adequacy of the facility licensees control room simulator in modeling the actual plant, and for meeting the requirements contained in 10 CFR 55.46.
Problem Identification and Resolution The inspectors evaluated the licensees ability to identify and resolve problems associated with licensed operator performance.
71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance
Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01) (2 Samples)
- (1) The inspectors observed and evaluated licensed operator performance in the control room during shutdown on April 21, 2023, and startup on April 23, 2023, for maintenance outage D3M21
- (2) The inspectors observed and evaluated licensed operator performance in the control Room during shutdown on April 24, 2023, and startup on April 27, 2023, for maintenance outage D2M20
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (2 Samples)
- (1) The inspectors observed and evaluated just in time training prior to the Unit 3 recirculation pump maintenance outage D3M21 on April 19, 2023
- (2) The inspectors observed and evaluated licensed crew performance in the simulator on May 10, 2023
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (3 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) Maintenance rule periodic 10CFR50.65 (a)(3) assessment (2)3B reactor recirculation pump adjustable speed drive (ASD) optical link module failure on April 23, 2023 (3)120Volt AC essential service and instrument buses Quality Control (IP Section 03.02) (1 Partial)
The inspectors evaluated the effectiveness of maintenance and quality control activities to ensure the following SSC remains capable of performing its intended function:
(1)
(Partial)
Unit 2 station blackout diesel maintenance window from June 26-29, 2023
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (2 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) Protected pathways for the Unit 2 maintenance outage D2M20, on April 25-27, 2023
- (2) Elevated plant risk during scheduled Unit 3 main seal oil pump replacement on June 13, 2023
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) Unit 2 drywell cooling system review on May 16-18, 2023
- (2) Unit 2 pump back system functionality review on May 22, 2023 (3)2/3 filter building area radiation monitor spiking downscale as documented in CR 4677845 on June 5, 2023
- (4) Unit 3 emergency core cooling system jockey pump evaluation after metal shaving identified in oil sample as documented in CR 4686499 on June 28, 2023
71111.20 - Refueling and Other Outage Activities
Refueling/Other Outage Sample (IP Section 03.01) (2 Samples)
- (1) The inspectors evaluated D3M21, Unit 3 maintenance outage for recirculation pump 3A seal replacement, activities from April 20-23, 2023.
- (2) The inspectors evaluated D2M20, Unit 2 maintenance outage for recirculation pump 2A replacement, activities from April 24-27, 2023.
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) (6 Samples)
- (1) DOP 750002, standby gas treatment surveillance and inservice test, following work on valve AO7510B, on April 12, 2023
- (2) Post-maintenance testing on the 3A recirculation pump seals following replacement, on April 2223, 2023
- (3) Post-maintenance testing on the 2A recirculation pump seals following replacement, on April 27, 2023
- (4) DIS 150033, recirculation loop break differential pressure switch functional test, per WO 5334739
- (5) Testing following replacement of Unit 3 low pressure coolant injection (LPCI) loop select logic relay in accordance with work order 01531115
- (6) Testing following replacement of Unit 2 LPCI loop select logic relay, following relay replacement, on May 30, 2023
Surveillance Testing (IP Section 03.01) (7 Samples)
- (1) DOS 662007, station blackout (SBO) 3 diesel generator surveillance tests, per WO 5334371
- (2) DIS 150032, Unit 2 Division 1 and 2 LPCI emergency core cooling system (ECCS)loop select logic system functional test, per WO 5198113
- (3) DOS 040002, rod worth minimizer operability surveillance on April 25, 2023
- (4) Division 2/3 EDG surveillance, per WO 5353630
- (5) DIS 026305, Unit 2 ATWS RPT/ARI and ECCS level MTU and STU channel functional test on May 2, 2023
- (6) DOS 110004, standby liquid control system quarterly/comprehensive pump test for the inservice testing program, on June 01, 2023
- (7) DOS 660001, Unit 3 EDG surveillance test, on May 23, 2023 Inservice Testing (IST) (IP Section 03.01)
DOS 660008, Unit 2 EDG cooling water pump quarterly and comprehensive test for operational readiness and inservice test, on June 12, 2023
Diverse and Flexible Coping Strategies (FLEX) Testing (IP Section 03.02) (1 Sample)
(1)
'A' FLEX diesel generator run for work order 5318008
71114.06 - Drill Evaluation
Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1 Sample)
- (1) June/July Performance Indicator Drill on June 22,
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) Unit 2 (April 1, 2022 through March 31, 2023)
- (2) Unit 3 (April 1, 2022 through March 31, 2023)
MS07: High Pressure Injection Systems (IP Section 02.06) (2 Samples)
- (1) Unit 2 (April 1, 2022 through March 31, 2023)
- (2) Unit 3 (April 1, 2022 through March 31, 2023)
BI02: RCS Leak Rate Sample (IP Section 02.11) (2 Samples)
- (1) Unit 2 (April 1, 2022 through March 31, 2023)
- (2) Unit 3 (April 1, 2022 through March 31, 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 issues:
- (1) Keys found in unattended vehicle in the protected area
71152S - Semiannual Trend Problem Identification and Resolution Semiannual Trend Review (Section 03.02)
- (1) The inspectors reviewed the licensees corrective action program for potential adverse trends in issue identification and documentation that might be indicative of a more significant safety issue.
INSPECTION RESULTS
Observation: Adverse Trend in Corrective Action Program Issue Identification and Documentation 71152S The inspectors performed a semiannual review of issues entered into the corrective action program and a cognitive review of plant observations over the period of January 1, 2023, to June 30, 2023, to identify any potential trends that might indicate the existence of a more significant safety issue. In the first half of 2023, the NRC inspectors identified several examples of issues not being identified at a low threshold and documented within the corrective action process.
The first example occurred on February 1, 2023, during walkdown of the Unit 3 station blackout (SBO) diesel generator when the inspectors identified that the air start motor cover had been left off and resting on the ground. The inspectors questioned what activity the cover had been left off as the guard is left in place to provide a barrier to individuals from rotation machinery during operation and represented a potential safety concern. The licensee documented the inspectors questions in CR 4551943, NRC Concern U3 SBO Area.
Following review of licensee documentation, the inspectors determined that the cover had been left off following post-maintenance run of the SBO diesel generator on January 13, 2023. The inspectors noted that the licensee inspects the area at least twice a day during operator rounds and had a multitude of opportunities to identify the discrepant condition during the 19 days the cover had been left off.
The second example occurred on March 9, 2023, during routine tour of the Unit 2 reactor building. The inspectors noted indications of an active leak on the 2B3999600 RBCCW heat exchanger tube side drain valve. The inspectors noted that directly below the leak location a discolored indication on the floor appeared to be associated with the leak. The inspectors raised the issue with the operations staff. Following review of the licensees documentation, the inspectors concluded that the leak had not been previously identified and likely had been occurring for some time due to the indications noted on the floor and relative slow leak rate of one drop per minute. The inspectors determined that the leak rate did not represent a challenge to the functionality of the heat exchanger or the Unit 2 RBCCW system. The inspectors noted that the licensee implemented procedure MAAA716010-1103, Fluid Sealing Technology Program, and hung a leak monitoring tag near the leak location.
The inspectors concluded that due to leak rate, floor discoloration and required twice-aday plant walkdowns, the licensee had multiple opportunities to identify and document the discrepant condition before being discovered by the inspectors.
The third example occurred on May 18, 2023, during routine walkdown of the Unit 3 reactor building. The inspectors observed several valves associated with the west bank of hydraulic control units (HCU) had various states of leak indications, annotations, and flagging. The inspectors noted several valves in question that had ongoing leak indications and questioned the licensee staff to understand corrective action status for those leaks. During review, the inspectors determined that two valves had not been identified and documented with the corrective action process, and the others were in various stages of planning within the work planning process. The inspectors determined that the licensees work planning process had created a universal work order to address HCU leaks for which some remained in planning status for up to five refueling cycles. The inspectors questioned why this was and was provided evaluation EC 395859, Evaluation of Leakage at Mechanical Connections for Class 1(2) System Leakage Test, revision 2, which established the threshold of 60 drops per minute as acceptable and would not challenge component function. The inspectors determined that while they did not identify an issue with the licensees developed threshold, based on their field observations, implementation of procedure MAAA716010-1103 seemed inconsistent as the purpose was to establish a process for Fluid Management that ensures external leakage from plant systems is classified, prioritized, monitored, managed, and corrected in a timely manner. The inspectors concluded that unrecognized or unmonitored leaks could challenge equipment reliability. To that end, the inspectors noted that on June 16, 2023, the licensee documented CR 4685191, PS 3-305-42-31 Not Working Properly Due to Water Intrusion, and CR 4685217, PS 3-305-46-27 Not Working Properly Due to Water Intrusion, which identified that during performance of DIS 030011, Control Rod Drive Accumulator High Level Switch Functional Test, for their respective HCUs that isolation valves with noted leaks above the switches had leaked in and affected the function.
The fourth example occurred on May 17, 2023. During routine plant walkdowns, the inspectors identified a section of hose stored underneath the staircase in Unit 2 west corner room with no associated automatic sprinkler system associated. The inspectors noted the materials to the operations staff and determined that procedure OPAA201009, Control of Transient Combustible Material, Revision 28, Section 4.4.1.5, stated in part, do not stage or store transient combustible material that is inside or beneath stairways, unless the area underneath the stairway is protected by an operable automatic sprinkler system. The licensee promptly removed the material and documented the inspectors concerns in CR 4678881, NRC ID: Found a Hose Underneath Staircase U2 West Corner Room. On June 13, 2023, during routine turbine building tours, inspectors identified transient combustible materials staged to perform Unit 3 seal oil vacuum pump maintenance were stored underneath a stairwell with no associated automatic sprinkler system. The licensee promptly removed the material and documented the inspectors concerns in CR 4684532, NRC ID: Transient Combustible. Additional actions taken by the licensee were to formally communicate transient combustible control requirements through site wide communications contextualized to risk importance and safety implications. In both examples, inspectors determined that the licensees failure to implement Section 4.4.1.5 of procedure OPAA201009, revision 28, were performance deficiencies. Specifically, combustible loading material was staged underneath stairways without associated automatic sprinklers.
The inspectors screened the issues using IMC 0612 Appendix E, Examples of Minor Issues, and determined that the performance deficiencies were similar to example 4.j in that the licensee failed to complete an engineering evaluation to compensate for all transient combustibles in an area which was contrary to Dresden Nuclear Power Station, Unit 2 Amendment to Renewed Facility Operating License Condition 2.E and Dresden Nuclear Power Station, Unit 3 Renewed Facility Operating License No. DPR25 Condition 3.G, and failed to implement all provisions of the approved fire protection program as described in the Updated Final Safety Analysis Report. The inspectors reviewed the circumstances, materials and potential impacts and determined that they did not adversely affect the mitigating systems cornerstone objective because the failures to implement OPAA201009 had little or no safety impact. Specifically, the transient combustibles could not affect equipment important to safety and did not exceed any licensing basis requirements. The inspectors determined that the transient combustibles identified were well below the fire hazards analysis limits. Upon identification, the licensee took immediate action and restored compliance. The failures to comply with Dresden Nuclear Power Station, Unit 2 Amendment to Renewed Facility Operating License Condition 2.E and Dresden Nuclear Power Station, Unit 3 Renewed Facility Operating License No. DPR25 Condition 3.G constitutes a minor violation that is not subject to enforcement action in accordance with the NRCs Enforcement Policy.
Finally, in conversation with plant management, the inspectors discussed the previously noted issues and ongoing efforts by the licensee to address equipment reliability. The inspectors noted that challenges in discrepant condition identification could also present challenges to, and hamper efforts to broadly address and improve equipment reliability. Other than the previously dispositioned issue, the inspectors did not identify any findings or violations associated with the inspection activities.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On July 26, 2023, the inspectors presented the integrated inspection results to P. Boyle, Site Vice President, and other members of the licensee staff.
On June 2, 2023, the inspectors presented the Biennial Licensed Operator Requalification inspection results to P. Boyle, Site Vice President, and other members of the licensee staff.
On June 2, 2023, the inspectors presented the Licensed Operator Requalification Annual Testing Summary inspection results to A. Kuzava, LORT Lead, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
4513848
Bar Rack Plugging DOA Entries
07/30/2022
Corrective Action
Documents
4553896
Bar Rack Inspection Opening in 2A Bar Racks
2/09/2023
Miscellaneous
Site Certification Letter for Summer Readiness
05/15/2023
Procedures
WCAA107
Seasonal Readiness
117 U3RB20
Unit 3 Southwest Corner Room Elev. 476'
134 U2TB37
Unit 2 CCSW Pumps Elev. 495'
161 U3TB72
Unit 3 Reactor Feed Pumps Elev. 517'
2 U3TB73
Unit 3 Diesel Generator Elev. 517'
Fire Plans
164 U3TB75
Unit 3 Track Way Area Elev. 517'
Procedures
CCAA211
Procedures
TQAA150F25
Dresden 2023 LORT Annual Exam Status Report
06/02/2023
Deferment of BWROG EPG / SAG Revision 4
Guidance
05/25/2021
Ops Staffing Issues Due to Call-Ins
09/25/2021
Ops Staffing Issues
09/25/2021
OPS-Fatigue Assessment
2/14/2021
NRC Question Regarding Ops Staffing on 12/20/21
2/20/2021
IRM HIHI received during startup
11/18/2022
Corrective Action
Documents
TRNG ID: LORT Exam Benchmark
05/01/2023
Dresden Station
Simulator Real
Time Test
LPCI Valve MO 150121A Valve Timing Under
Normal and Accident Conditions
2/21/2022
OPEX-AK
Simulator Exercise Guide
OPEX-AR
Simulator Exercise Guide
OPEX-AT
Simulator Exercise Guide
OPEX-H
Simulator Exercise Guide
P20300-03
In Plant JPM
P23300-01
In Plant JPM
P27400-01
In Plant JPM
P30300-03
In Plant JPM
Miscellaneous
P34650-01
In Plant JPM
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
P37400-01
In Plant JPM
S070017
Simulator JPM
S160007
Simulator JPM
S230002
Simulator JPM
S390002
Simulator JPM
S610001
Simulator JPM
S740001
Simulator JPM
S-EP14
Admin JPM
S-RD13
Admin JPM
Senior Reactor
Operator
Accelerated
Requalification
Action Plan
Senior Reactor Operator Accelerated Requalification
Action Plan
08/10/2021
Simulator PM
Schedule
Dresden Simulator Preventative Maintenance (PM)
Schedule
21
Simulator PM
Schedule
Dresden Simulator PM Schedule
22
Simulator Reactor
Core
Performance
Testing
Reference Unit vs. Simulator Comparison Test -
D2C28
2/23/2022
Simulator
Transient Test -
TT1
2/06/2021
Simulator
Transient Test -
TT10
Main Steam Line Isolation Valve Closure with Stuck
Open SRV and No High Pressure ECCS
2/07/2021
Simulator
Transient Test -
TT2
Loss of All Feedwater (Normal and Emergency)
2/06/2021
Simulator
Transient Test -
TT3
Main Steam Line Isolation Valve Closure
2/06/2021
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
Simulator
Transient Test -
TT4 and TT5
Recirc Pump Trips
2/06/2021
Simulator
Transient Test -
TT6
Turbine Trip from a Power Level Such That a Scram
Does Not Occur
2/07/2021
Simulator
Transient Test -
TT7
Maximum Rated Power Ramp
2/07/2021
Simulator
Transient Test -
TT8
LOCA With a Loss of Offsite Power
2/07/2021
Simulator
Transient Test -
TT9
Maximum Size Un-Isolable Steam Line Break
2/07/2021
TQ-AA224F100
Remedial Training Notification and Action on Failure -
21 Comprehensive Written Examination Failure
TQ-AA306F-02
Simulator Review Board Minutes - 1/10/2022
01/10/2022
TQ-AA306F-02
Simulator Review Board Minutes - 3/4/2022
03/04/2022
TQ-AA306F-02
Simulator Review Board Minutes - 10/4/2022
10/04/2022
TQ-AA306F-02
Simulator Review Board Minutes - 2/21/2023
2/21/2023
TQ-AA306F-02
Simulator Scenario Based Testing Checklist -
Licensed Operator Requalification Exam 2022
Scenario OPEX-Y
03/13/2022
TQ-AA306F-03
Dresden Steady State Testing for D2C28
2/24/2022
TQ-AA306F-03
Dresden Transient Testing for D2C28
2/21/2021
TQ-AA306F-03
Post Event Test - Feedwater Regulator Valve Fails
Open 712-22
2/19/2022
TQAA306F-20
OPEX-AF Scenario Based Testing Rev 10
03/14/2022
TQAA306F-20
Simulator Scenario Based Testing Checklist - Initial
License Exam 2023301 Scenario 1
01/09/2023
TQAA306J002
Simulator Testing Report - Dresden - Test Period -
Start Date 11/07/2021 - End Date 02/24/2022
03/07/2022
Written Exam
05/16/2023
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
Answer Key
Written Exam
Answer Key
05/16/2023
AR428807075
Ops ILT Self-Assessment
03/17/2022
AR428807076
Dresden Operations Training Comprehensive Self-
Assessment
06/22/2022
AR428807077
Simulator Compliance Audit
06/22/2022
Operations Functional Area Audit Report NOSA-
DRE2204
08/31/2022
AR454809101
Pre-NRC 71111.11 Licensed Operator Requalification
Program and Licensed Operator Performance
2/23/2023
Self-
Assessments
TQAA306F-21
Simulator Testing Audit Checklist
03/03/2023
Modification - Hydrogen Cooler Temperature
Controller Replacement
2/19/2020
Modification - Plant Process Computer for rate of
change for Feedwater Regulating Valves
07/18/2022
Simulator Work Request - EC 630967, Replace 2A
LPCI HX DP Controller 21540-3A
06/10/2021
Simulator Work Request - HPCI Speed Control
During DOS 230003 Just in Time Training
2/07/2022
Simulator Work Request - Turbine Trip APRM Power
Spike
01/10/2023
Work Orders
Simulator Work Request - Safety Valve EPN Incorrect
on Temperature Recorder
04/21/2023
OPEX-AJ
Miscellaneous
OPEX-AP
DGP 0101
Unit Startup
207
DGP 0201
Unit Shutdown
177
DGP 0203
Reactor SCRAM
20
NFAB715
Critical Prediction Checklist Attachment 1
NFAB720F-1
Control Rod Sequence Review and Approval Sheet
04/22/2023
NFAB720F-1
Control Rod Sequence Review and Approval Sheet
04/26/2023
Procedures
NFAB720F-2
Control Rod Move Sheet
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
ReMA Plan
D228001
Unit Reactor Startup from All Rods into Less Than 25
Percent Core Thermal Power
04/27/2023
ReMA Plan
D228005
Unit 2 Shutdown
ReMA Plan
D328001
Unit 3 Reactor Startup from All Rods in to Less than
Percent Core Thermal Power
11/17/2022
248726
Replacement Options for Obsolete Classic Molded
Case Circuit
08/31/2004
248790
Replacement Options for Obsolete Molded Case
Circuit Breakers
08/31/2004
251270
Replacement Obsolete Classic Molded Case Circuit
(480 V)
09/09/2004
251294
Replacement Obsolete Classic Molded Case Circuit
(480 V)
09/09/2004
204814
ESS UPS ABT Obsolescence
2/20/2018
4506546
Follow-Up IR 04472806 for U3 MSIV Solenoid
Troubleshooting
06/20/2022
4534978
U3 ESS Current Low DOS 680001
11/05/2022
4672297
Possible 3B ASD OLM-B1/OLM-MB1 Optical
Overdrive
04/23/2023
4673141
D2M20 EOC 2A ASD OLM-MA1 Replacement
Recommendation
04/26/2023
4673142
D2M20 EOC 2B ASD OLM-MA1 Replacement
Recommendation
04/26/2023
4673149
2A ASD Transformer Cabinet Extent of Cause OLM
XA1 Replacement
04/26/2023
4673151
2A ASD Transformer Cabinet Extent of Cause OLM
XB1 Replacement
04/26/2023
4673253
Trend IR - D2M20 TS&R ASD OLM Transformer
Failures
04/26/2023
913862
ESS: One-Time Replacement of Panel Breakers
30903-49
04/30/2009
Corrective Action
Documents
913866
ESS: One-Time Replacement of Panel Breakers
20902-49
04/30/2009
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
Corrective Action
Documents
Resulting from
Inspection
4486989
NRC Question Related to Instrument Bus Breakers
03/24/2022
2E2325 Sheet
Key Diagram 120/240V AC Distribution Instrument
Bus 90250
AI
2E2682
Wiring Diagram 120/240 AC Distribution Panels ESS
SERV Bus Distr Panel 90249 Instrument Bus Distr
Panel 90250
BD
2E2811B
Single Line Diagram Uninterruptible Power Supply
Panel 90263
A
Drawings
2E3325 Sheet
Key Diagram 120 & 120/240VAC Distribution
Essential Instrument & Reactor Protection Buses
395817
Breaker Replacement Evaluation
08/20/2010
Engineering
Changes
396792
Breaker Replacement Evaluation
System Health Report; AC/DC Distribution
Maintenance Rule System Basis Document; Unit 2;
20V AC Essential Service (ESS)
2/16/2021 &
06/09/2023
Maintenance Rule System Basis Document; Unit 2;
20V AC Instrument Bus
2/16/2021 &
06/09/2023
Maintenance Rule Periodic Assessment 14
(10CFR50.65 (a)(3) Assessment)
10/01/202009/30/2022
DRE110281
Replacement of ESS & amp; Instrument PNL
Distribution Breakers
09/09/2019
DRE190005
LR2 DRE ESS ABT Switch Replacement
09/09/2019
DRE190018
LR2 DRE Instrument Bus ABT Switch Replacement
09/09/2019
IEE 70420
Item Equivalency for the Cutler-Hammer Circuit
Breaker Cat Id 14449341
Miscellaneous
PMC22133919
Extend ASD Optical Link Module Replacement
Preventative Maintenances
04/27/2022
DOA 680001
Loss of Power to Essential Service System Bus or
Instrument Bus
Procedures
DOA 6800T1
Essential Service System and Instrument Bus
Detailed Load List
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
ERAA2002
System and Equipment Health Monitoring
ERAA320
Maintenance Rule Implementation Per NEI 18-10
ERAA3201004
Maintenance Rule 1810 - Performance Monitoring
and Disposition Between (a)(1) and (a)(2)
ERAA3201004
Maintenance Rule 1810- Performance Monitoring
and Dispositioning Between (a)(1) and (a)(2)
01690192
D2 2RFL PM CLEAN/LUB/INSP INST Bus Auto
Throwover SW
11/06/2019
01783912
D3 3RFL PM CLEAN/LUB/INSP INST Bus Auto
Throwover Switch
10/30/2020
04713879
D2 RFL TSTR FUNC Test of ESS Power Supply
Operability
11/02/2019
Work Orders
04863768
D3 RFL TSTR FUNC Test of ESS UPS Power Supply
Operability
10/30/2020
DOA 535001
Loss of Seal Oil Pumps
Procedures
OPAA108117
Protected Equipment List
04/25/2023
5314390
Replace 35350-H12 Unit 3 Main Seal Oil Pump
Discharge Relief Valve
06/13/2023
Work Orders
5358479
Replace 35350-MSOP Unit 3 Main Seal Oil Pump
06/13/2023
4679679
2B Compressor (28551-B) Found Degraded
05/21/2023
Corrective Action
Documents
4679685
2B Pumpback Compressor Discharge Check Valve
Chattering 28599-549
05/21/2023
M25
Diagram of Pressure Suppression Piping
Drawings
M37, Sheet 2
Diagram of Instrument Air Piping
Miscellaneous
K4080
General Work Specification Maintenance/Modification
Work, Dresden Station Units 2 and 3
4670028
DOA 020205 Seal Failure Due to 2A Recirc.Pump
Seal 2
04/14/2023
Corrective Action
Documents
4672205
30399-600 Relief Valve Leaking
04/23/2023
D3M21 Shutdown Safety Management Plan
04/18/2023
DRE970105
Determination of Combustible Loading
Miscellaneous
DRE980018
ECCS Strainer Head Loss Estimates for Dresden
Station Units 2 and 3
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
DGP 0101
Unit Startup
207
DGP 0201
Unit Shutdown
177
Procedures
DOA 020205
Recirculation Pump Seal Failure
4549756
Diesel FLEX Pump "B" Will Not Start
01/22/2023
4550118
Trend IR: FLEX Equipment Deficiencies
01/24/2023
Corrective Action
Documents
4672200
3A RR Seal ORing Placement
04/23/2023
4682495
NRC Questions During WO 05318008
06/03/2023
Corrective Action
Documents
Resulting from
Inspection
4684532
NRC ID: Transient Combustible
06/13/2023
M33
Diagram of Standby Liquid Control Piping
IB
Drawings
M517
Diesel Generator Engine Cooling Water System
J
DIS 026305
Unit 2 ATWS RPT/ARI and ECCS Level MTU and
STU Channel Functional Test
DIS 150033
LPCI System Recirculation Loop Break Detection
Switch Functional Test
DOP 020214
Filling and Venting the Recirculation Pump and Seals
DOP 750002
SBGT System Surveillance and IST Test
DOS 040002
Rod Worth Minimizer Operability Surveillance
DOS 110004
Standby Liquid Control System
Quarterly/Comprehensive Pump Test for the Inservice
Testing (IST) Program
Procedures
FSG13
FLEX Diesel Generator Operation
1531115
D3 10 Year Preventative Maintenance Replace
Control Relay 31530-183
06/12/2023
1531116
D3 10 Year Preventative Maintenance Replace
Control Relay 31530-184
06/12/2023
1876007
IM D2/3 8Y PM Cal & Diag Test-B SBGT Suct AOV
04/12/2023
5198113
IM D2 24m TS Div 1 & 2 LPCI ECCS Loop Select
Circuitry LSFT
04/14/2023
53334371
D3 Quarterly Com SBO Diesel Generator
Surveillance
04/13/2023
Work Orders
5334740
Recirculation Loop Break Differential Pressure Switch
05/30/2023
Inspection
Procedure
Type
Designation
Description or Title
Revision or Date
Functional Test
5334769
Recirculation Loop Break Differential Pressure Switch
Functional Test
05/31/2023
5335773
2A SBLC Pump Test for Inservice Testing
Surveillance
06/01/2023
5348828
Diesel Generator Cooling Water Pump Test for IST
Program Surveillance
06/12/2023
5359515
D3 1 Month Unit Diesel Generator Operability
05/23/2023
Miscellaneous
June/July PI Drill Manual
06/22/2023
MSPI HPI Prepared Data Package
04/01/2022 through
03/31/2023
MSPI Emergency AC Power Systems Prepared Data
Package
04/01/2022 through
03/31/2023
71151
Miscellaneous
Performance Indicator Data: Barrier Integrity - RCS
Identified Leakage
04/01/2022 through
03/31/2023