IR 05000237/2022001
| ML22110A129 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 04/20/2022 |
| From: | Kenneth Riemer NRC/RGN-III/DRP/B1 |
| To: | Rhoades D Constellation Energy Generation, Constellation Nuclear |
| References | |
| IR 2022001 | |
| Download: ML22110A129 (19) | |
Text
SUBJECT:
DRESDEN NUCLEAR POWER STATION, UNITS 2 AND 3 - INTEGRATED INSPECTION REPORT 05000237/2022001 AND 05000249/2022001
Dear Mr. Rhoades:
On March 31, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Dresden Nuclear Power Station, Units 2 and 3. On April 5, 2022, the NRC inspectors discussed the results of this inspection with Ms. Carolyne Joseph, Plant Manager, and other members of your staff. The results of this inspection are documented in the enclosed report.
One finding of very low safety significance (Green) is documented in this report. This finding did not involve a violation of NRC requirements.
If you disagree with a cross-cutting aspect assignment or a finding not associated with a regulatory requirement in this report, you should provide a response within 30 days of the date of this inspection report, with the basis for your disagreement, to the U.S. Nuclear Regulatory Commission, ATTN: Document Control Desk, Washington, DC 20555-0001; with copies to the Regional Administrator, Region III; and the NRC Resident Inspector at Dresden Nuclear Power Station, Units 2 and 3.
April 20, 2022 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, Kenneth R. Riemer, Chief Branch 1 Division of Reactor Projects 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:
05000237/2022001 and 05000249/2022001
Enterprise Identifier:
I-2022-001-0062
Licensee:
Constellation Energy Generation, LLC
Facility:
Dresden Nuclear Power Station, Units 2 and 3
Location:
Morris, IL
Inspection Dates:
January 01, 2022 to March 31, 2022
Inspectors:
A. Nguyen, Senior Resident Inspector
A. Demeter, Reactor Engineer
M. Domke, Reactor Inspector
G. Edwards, Senior Health Physicist
M. Garza, Emergency Preparedness Inspector
M. Porfirio, Illinois Emergency Management Agency
Approved By:
Kenneth R. Riemer, Chief
Branch 1
Division of Reactor Projects
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
Failure to Document a Condition Adverse to Quality for the Unit 3 Main Power Transformer Control Power Cabinet Fire Cornerstone Significance Cross-Cutting Aspect Report Section Initiating Events Green FIN 05000237,05000249/2022001-01 Open/Closed
[H.11] -
Challenge the Unknown 71152A A finding of very low safety significance (Green) was self-revealed for the licensees failure to follow PI-AA-120, Issue Identification and Screening Process, for documenting a condition adverse to quality. Specifically, the licensee failed to document an identified hot spot on a resistor within the Unit 3 main power transformer (MPT) during startup monitoring on November 3, 2021. This was a missed opportunity for the licensee to evaluate and mitigate the potential adverse impacts of the hot spot prior to a fire occurring in the control power cabinet of the MPT on November 18, 2021.
Additional Tracking Items
None.
PLANT STATUS
Unit 2 began the inspection period at rated thermal power. On February 5, 2022, power was reduced to approximately 80 percent to a control rod shaper pull and make emergent repairs to the 2B reactor feed pump. The unit returned to rated thermal power on February 6, 2022. On March 5, 2022, power was reduced to approximately 75 percent to perform a control rod sequence exchange and bypass valve testing. The unit was returned to rated thermal power on March 6, 2022, and remained at or near full rated thermal power for the remainder of the inspection period.
Unit 3 began the inspection period at rated thermal power. On March 12, 2022, power was reduced to approximately 80 percent for a control rod sequence exchange, control rod drive testing, and to repair a main turbine control valve cable. The unit returned to rated thermal power on March 13, 2022, and remained at or near full 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, conducted routine reviews using IP 71152, Problem Identification and Resolution, 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:
- (2) Unit 3 high pressure coolant injection (HPCI) alignment following maintenance window on March 2-3, 2022
- (3) Unit 2 HPCI alignment following maintenance window on March 8, 2022
Complete Walkdown Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated system configurations during a complete walkdown of the emergency diesel generator (EDG) systems during the weeks of March 14 and March 28, 2022.
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (6 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 1.1.2.3 Unit 2 reactor building general area 545' on January 22, 2022
- (2) Fire Zone 8.2.6.C Unit 2/3 lube oil reservoir area elevation 534' on January 29, 2022
- (3) Fire Zone 1.1.2.3, Unit 2 HPCI pump room, elevation 476' on February 15, 2022
- (4) Fire Zone 1.1.2.5A, Unit 2 isolation condenser area, elevation 589' on February 15, 2022
- (5) Fire Zone 1.1.2.1, Unit 2 torus basement and torus catwalk, elevation 476' on February 22, 2022
- (6) Fire Zone 1.1.1.1, Unit 3 torus basement and torus catwalk, elevation 476' on February 22, 2022
71111.06 - Flood Protection Measures
Inspection Activities - Internal Flooding (IP Section 03.01) (1 Sample)
The inspectors evaluated internal flooding mitigation protections in the:
- (1) Containment cooling service water vault door leak rate following failure of as left leak rate test
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 the performance of load drop to 75 percent power to support control rod adjustments and reactor feedwater pump 2B breaker maintenance on February 5, 2022.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated a crew performance evaluation scenario in the main control room simulator on February 10, 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) EDG air start systems maintenance strategy due to moisture intrusion
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (6 Samples)
- (1) Emergent work to replace 2B RFP breaker due to 2B RFP ON light not illuminated during pump operation as documented in AR 04473265 on February 5, 2022
- (2) Elevated risk work to replace 2B RBCCW pump motor per WO 99226609, on February 14-15, 2022
- (3) Emergent, elevated risk work to replace the Unit 3 digital electrohydraulic control (DEHC) system pressure controller 'S' VCMI card per WO 5232279 on February 17, 2022
- (4) Elevated risk preventive maintenance window for Unit 3 HPCI on March 1 - 2, 2022
- (5) Elevated risk for Unit 2 EDG maintenance window and emergent work prior to the window on March 13-18, 2022
- (6) Emergent, elevated risk work to address Unit 3 turbine lube oil cooler service water drain line shear and flooding in turbine building on March 22, 2022
71111.15 - Operability Determinations and Functionality Assessments
Operability Determination or Functionality Assessment (IP Section 03.01) (2 Samples)
The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:
- (1) Historic operability of level transmitter (LT) 3-0302-82D when found outside Technical Specification value during surveillance testing
- (2) Unit 2 EDG fuel priming pump failure to start during post-maintenance testing
71111.19 - Post-Maintenance Testing
Post-Maintenance Test Sample (IP Section 03.01) (7 Samples)
- (1) Unit 2 SBO diesel generator breaker functional testing following troubleshooting and repair of high resistance on cables from Bus 23 to Bus 61 on February 11, 2022
- (2) Unit 2 functional and operational testing of the 2B reactor feedwater pump following replacement of 4KV breaker per WO 5225086 on January 22, 2022 (3)2B RBCCW pump testing following motor replacement per WO 99226609 on February 17, 2022
- (4) DOS 6600-01, 2/3 diesel generator surveillance test, following replacement of the jacket water pressure switch on February 28, 2022
- (5) DOS 2300-03, Unit 3 HPCI system operability and quarterly IST verification test on March 3, 2022
- (6) DOS 6600-01, Unit 2 diesel generator surveillance test, following preventive maintenance window on March 18, 2022
- (7) DOS 6600-01, Unit 2/3 diesel generator surveillance test, following preventative maintenance window on March 30, 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) (1 Sample)
- (1) DIS 0500-31, Unit 3 scram discharge volume level instrumentation calibration and functional tests, on March 10, 2022
Inservice Testing (IP Section 03.01) (1 Sample)
- (1) DOS 1100-04, standby liquid control system quarterly/comprehensive pump test for the inservice testing (IST) program on March 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:
2020 PNS System Maintenance Report
2021 PNS System Maintenance Report
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
Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1 Sample)
- (1) Dresden 1Q2022 focused area drill on March 10,
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:
- (1) Unit 2/3 reactor building ventilation system
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) (1 Sample)
The inspectors evaluated the following internal dose assessments:
- (1) Whole Body Count inVivo analysis performed on January 28, 2022
Special Dosimetric Situations (IP Section 03.04) (1 Sample)
The inspectors evaluated the following special dosimetric situations:
- (1) Declared pregnant worker documentation from January 12,
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
IE01: Unplanned Scrams per 7000 Critical Hours Sample (IP Section 02.01)===
- (1) Unit 2 (January 1, 2021 through December 31, 2021)
- (2) Unit 3 (January 1, 2021 through December 31, 2021)
IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 02.02) (2 Samples)
- (1) Unit 2 (January 1, 2021 through December 31, 2021)
- (2) Unit 3 (January 1, 2021 through December 31, 2021)
IE04: Unplanned Scrams with Complications (USwC) Sample (IP Section 02.03) (2 Samples)
- (1) Unit 2 (January 1, 2021 through December 31, 2021)
- (2) Unit 3 (January 1, 2021 through December 31, 2021)
EP01: Drill/Exercise Performance (DEP) Sample (IP Section 02.12) (1 Sample)
- (1) April 1, 2021 through December 31, 2021 EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13) (1 Sample)
- (1) April 1, 2021 through December 31, 2021 EP03: Alert and Notification System (ANS) Reliability Sample (IP Section 02.14) (1 Sample)
- (1) April 1, 2021 through December 31, 2021
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) Evaluation of and corrective actions associated with the second Unit 3 main power transformer fire inside the control power cabinet under AR 4461720
- (2) Corrective actions associated with design control NCV of LPCI LOOP select differential pressure switches water intrusion under AR
INSPECTION RESULTS
Failure to Document a Condition Adverse to Quality for the Unit 3 Main Power Transformer Control Power Cabinet Fire Cornerstone Significance Cross-Cutting Aspect Report Section Initiating Events Green FIN 05000237,05000249/2022001-01 Open/Closed
[H.11] -
Challenge the Unknown 71152A A finding of very low safety significance (Green) was self-revealed for the licensees failure to follow PI-AA-120, Issue Identification and Screening Process, for documenting a condition adverse to quality. Specifically, the licensee failed to document an identified hot spot on a resistor within the Unit 3 main power transformer (MPT) during startup monitoring on November 3, 2021. This was a missed opportunity for the licensee to evaluate and mitigate the potential adverse impacts of the hot spot prior to a fire occurring in the control power cabinet of the MPT on November 18, 2021.
Description:
On November 18, 2021, the Unit 3 main control room received multiple alarms associated with the MPT. Shortly thereafter, a small fire was reported in the control power cabinet of the MPT. The fire was extinguished immediately, and the operators entered the applicable abnormal operating procedures. The unit was emergently down powered to take the turbine offline and affect repairs to the transformer.
Technicians inspected the control power cabinet and found damage to several components within the cabinet. A troubleshooting team was established to further inspect the transformer to identify the cause of the fire. The cause of the fire was determined to be overheating of adjustable resistor CBA2 due to a heating element that was in parallel with the resistor being open circuited, causing all current to flow through CBA2 (overloaded). These components are part of one of the winding hot spot temperature circuits. A temporary modification was installed to remove this part of the circuit from service and adjust settings on the associated winding temperature gauge to compensate for this missing element of the circuit.
The licensee conducted a causal evaluation for the equipment failure under AR 4461720.
During this evaluation, it was revealed that thermography was performed as part of the startup monitoring of the new transformer after installation on November 3, 2021. The thermography documentation recorded a temperature for the failed resistor that was higher than normal. After conversations with the thermographer, it was determined that the individual was unsure of the result obtained, asked the supervisor and peers about the data, and decided that the temperature reading was not abnormal; therefore, the issue was not entered into the CAP. The licensee conducted a Human Performance Review Board for this issue under AR 4470594 and concluded that not appropriately documenting and evaluating this thermography data was a missed opportunity to mitigate the potential adverse impacts of the hot spot and possibly prevent the fire. Specifically, Exelon procedure, PI-AA-120, Issue Identification and Screening Process, section 3.7 delineates the responsibilities of issue originators, which includes ensuring conditions that have or could have an undesirable effect on performance of equipment are properly documented. This procedure also defines a condition adverse to quality as any failures, malfunctions, deficiencies, defective items, and non-conformances.
Corrective Actions: The individual and supervisor were provided coaching on entering items into the corrective action program and the thermography procedure guidance was enhanced for what are acceptable temperature values for different components.
Corrective Action References: AR 4461720, Transformer 3 Trouble, and AR 4470594, Missed Opportunity for Thermography Data Analysis
Performance Assessment:
Performance Deficiency: The failure to document the identified hot spot, a condition adverse to quality, during thermography of the Unit 3 MPT during startup monitoring was contrary to licensee procedure, PI-AA-120, Issue Identification and Screening Process.
Screening: The inspectors determined the performance deficiency was more than minor because it was associated with the Equipment Performance attribute of the Initiating Events cornerstone and adversely affected the cornerstone objective to limit the likelihood of events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, the licensee failed to document a condition adverse to quality, a hot spot on a resistor identified during thermography, which adversely impacted operation of the Unit 3 MPT, resulting in a fire.
Significance: The inspectors assessed the significance of the finding using Appendix A, The Significance Determination Process (SDP) for Findings At-Power. The finding screened as having very low safety significance (Green) based on answering No to the transient initiator question because it did not cause a reactor scram and/or the loss of mitigation equipment.
Cross-Cutting Aspect: H.11 - Challenge the Unknown: Individuals stop when faced with uncertain conditions. Risks are evaluated and managed before proceeding. Specifically, in this finding individuals were aware of an unanticipated or abnormal result (i.e. higher than normal temperature reading for the resistor), but did not effectively evaluate or resolve the issue, resulting in a missed opportunity to potentially mitigate or eliminate the cause of the control power cabinet fire due to overheating of the circuit.
Enforcement:
Inspectors did not identify a violation of regulatory requirements associated with this finding.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On April 5, 2022, the inspectors presented the integrated inspection results to Ms. C. Joseph, Plant Manager, and other members of the licensee staff.
On February 11, 2022, the inspectors presented the radiation protection inspection results to Mr. P. Boyle, Site Vice President, and other members of the licensee staff.
On March 18, 2022, the inspectors presented the EP program inspection results inspection results to Ms. C. Joseph, Plant Manager, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
DOP 2300-M1/E1
Unit 3 HPCI System Checklist
DOP 2300-M1/E1
Unit 2 HPCI System Checklist
DOP 6600-04
Diesel Generator 2/3 Preparation for Standby Operation
DOP 6600-M2
Unit 2/3 Emergency Diesel Generator Mechanical Checklist
DOP 6606-E2
Unit 2/3 Standby Diesel Generator Electrical Checklist
DOP 6620-E1
Unit 2 Station Blackout Electrical Checklist
Procedures
DOP 6620-M1
Unit 2 Station Blackout Mechanical Checklist
Corrective Action
Documents
4477688
XL3 34-19, Unit 2 HPCI Room Fire Alarm
2/12/2022
4480022
NRC ID: Evidence of Thru Wall Leak on Fire Protection
Piping for Unit 3
2/22/2022
Corrective Action
Documents
Resulting from
Inspection
4480027
NRC ID: Free Insulation Torus Bay 6 under Unit 2 HPCI
Discharge Line
2/22/2022
101 U2RB-1
Fire Zone 1.1.2.1, Unit 2 Torus Basement and Torus
Catwalk, Elev. 476'
104 U2RB-4
Fire Zone 1.1.2.3, Unit 2 HPCI Pump Room, Elev. 476'
108 U2RB-7
Fire Area/Zone 1.1.2.3 Unit 2 Reactor Building General Area
545'
115 U2RB-12
Fire Zone 1.1.2.5.A, Unit 2 Isolation Condenser Area, Elev.
589'
116 U3RB-19
Fire Zone 1.1.1.1, Unit 3 Torus Basement and Torus
Catwalk, Elev. 476'
Fire Plans
177 U2/3TB-94
Fire Area/Zone 8.2.6.C Unit 2/3 Lube Oil Reservoir Area
Elev. 534'
Procedures
Pre-Fire Plan Manual
Miscellaneous
DR-PSA-012
Internal Flood Evaluation Summary and Notebook
DOA 0040-02
Localized Flooding in Plant
DOS 1500-21
CCSW Pump Vault Watertight Door Leak Test
Procedures
DTP 70
Evaluation of CCSW Pump Vault Flood Protection Leakage
Test Result
Work Orders
04761794-01
EWP MM D3 4Y Com Adjust CCSW Vault Door/Repl Seal &
Packing
03/23/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
04761794-02
Op Perform as Left Leak Test Per DOS 1500-21
03/24/2022
Roles and Responsibilities of On-Shift Personnel
Watch Standing Practices
Communications
Operator Training Programs
Procedures
Conduct of Simulator Training and Evaluation
4454158
U3 EDG Failure to Start
10/20/2021
Corrective Action
Documents
4475764
Fleet EDG Starting Air PCM Template
2/02/2022
Miscellaneous
(A)(1) Maintenance Rule Functional Failure Determination
for U3 EDG
11/24/2021
Procedures
Implementation of the Maintenance Rule
Work Orders
05198802
EWP MM EOC Replace Air Start Motors for 2/3 EDG
03/28/2022
4389199
2A RFP Indicating Light Out
2/09/2020
4465153
2B RFP ON Light Not Illuminated During Pump Operation
2/01/2022
4473265
2B RFP ON Light Not Illuminated During Pump Operation
01/21/2022
4484453
Unit 2 EDG Circulating Oil and Turbo Pump Breaker Tripped
at MCC 28-3
03/12/2022
4484516
Unit 2 EDG Immersion Heater Breaker Trip
03/13/2022
4485615
Unit 3 EDG Air Receiver Tank A1 Outboard Drain Valve is
Leaking
03/17/2022
4486517
Unit 3 Service Water Leak
03/22/2022
Corrective Action
Documents
4486783
Extent of Condition of 3B Cooler Drain Line
03/23/2022
Corrective Action
Documents
Resulting from
Inspection
4485610
Unit 3 EDG Air Receiver Tank A2 Outboard Drain Valve is
Leaking
03/17/2022
Engineering
Evaluations
634756
Rigging Evaluation for Removal and Replacement of 2B
RBCCW Pump Motor, 2-3701-B
Procedures
Protected Equipment List
232279
Replace Pressure Control Master Bus Controller VCMI in
903-31 Panel
2/17/2022
Work Orders
226609
Replace 2B RBCCW Pump Motor, 2-3701-B
2/15/2022
Corrective Action
04483846
LT 3-0302-82B Found OOT
03/10/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
04485609
Trend IR: OOT for DIS 0500-31
03/17/2022
4481363
Engineering to Evaluate Iso Condenser Batteries
2/28/2022
4483846
LT 3-0302-82D found Out of Tolerance during Surveillance
03/10/2022
Documents
4485332
Unit 2 EDG Fuel Priming Pump Will Not Start
03/16/2022
Engineering
Evaluations
360279
Evaluate EDG Startup without Fuel Oil Priming Pump
Operability
Evaluations
OPDC 04483846-
Evaluate LS 3-0302-82D for Historic Operability
03/25/2022
Procedures
DIS 0500-31
Unit 3 Scram Discharge Volume Level Instrumentation
Calibration and Functional Tests
4476857
Bus 23 from SBO Bus 61 Trip Circuit is Not Working
2/08/2022
4481065
2/3 EDG Trip during DOS 6600-01, Entered DOA 6600-01
2/27/2022
4481877
Unit 3 HPCI Tank Oil Heater T3 Phase Grounded
03/01/2022
4485082
Unit 2 EDG Cooling Water Immersion Heater Damaged
03/15/2022
4485216
Unit 2 EDG Cooling Water Immersion Heater Grounded
03/15/2022
4485836
Unit 2 Diesel Fuel Oil Pump Discharge Pressure Low during
Surveillance
03/18/2022
Corrective Action
Documents
4486463
Unit 2 EDG Crankcase Oil Level Low
03/22/2022
Engineering
Changes
453984
Engineering Evaluation for Repair/Replacing Cable Leads
03/15/2022
DOS 2300-03
Unit 3 High Pressure Coolant Injection System Operability
and Quarterly IST Verification Test
118
Procedures
DOS 6600-01
Diesel Generator Surveillance Tests
146
4897803
Unit 2 EDG Fuel Priming Pump Troubleshooting
03/17/2022
207263
Unit 2 Diesel Generator Fast Start Operability Surveillance
Test
03/18/2022
25086
2B RFP ON Light Not Illuminated During Pump Operation
Contingency Plan
01/22/2022
230117
Bus 23 from SBO Bus 61 Trip Circuit is Not Working
2/11/2022
234795
Troubleshoot and Repair 2/36641-525 for 2/3 EDG Trip
during DOS 6600-01
2/28/2022
Work Orders
226609
Replace 2B RBCCW Pump Motor, 2-3701-B
2/17/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
4483846
LT 3-0302-82D found Out of Tolerance
03/10/2022
4483851
LT 3-0302-82B found Out of Tolerance
03/10/2022
4484035
LT 3-0302-82H found Out of Tolerance
03/10/2022
4484083
LT 3-0302-82J found Out of Tolerance
03/10/2022
4484086
LT 3-0302-82K found Out of Tolerance
03/10/2022
Corrective Action
Documents
4485609
Trend IR: Out of Tolerances for DIS 0500-31
03/17/2022
DIS 0500-31
Unit 3 Scram Discharge Volume Level Instrumentation
Calibration and Functional Tests
Procedures
DOS 1100-04
Standby Liquid Control System Quarterly/Comprehensive
Pump Test for the Inservice Testing (IST) Program
Work Orders
4961801
Unit 3 Scram Discharge Volume High Level Channel
Calibration
03/10/2022
27342
EP Technical Support Center Inventory Issues 1Q2020
03/17/2020
27344
Operations Support Center Inventory 1Q2020 Inventory
Items
03/17/2020
4343994
06/19/2020
4345693
06/26/2020
4360601
09/02/2020
4362267
08/10/2020
4363005
09/13/2020
4433570
07/06/2021
4438721
Grundy County Siren Controller Error
08/03/2021
4438754
Inadvertent Siren Activation for Will County Sirens
08/03/2021
4463617
11/29/2021
Corrective Action
Documents
4475265
EP-Multiple Siren Activation During Siren Test
2/01/2022
Miscellaneous
PNS System Maintenance Report
20 and
21
Miscellaneous
Emergency Response Organization (ERO) Augmentation
Drill Reports
20 - 2021
24146
NOSA-DRE-20-03 Dresden Station Emergency
Preparedness Audit
05/19/2020
25253
Exelon Phone System Not Working Correctly
03/10/2020
Corrective Action
Documents
27348
Field Team Inventory 1Q2020 Items
03/17/2020
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
4337583
NOS ID: Revise PMRQ 174726-01 Annual Speaker
Surveillance
04/22/2020
4337665
NOS ID: Address the Request of CC FPD
04/22/2020
4337667
NOS ID: Contact Morris Hospital to Ensure Alignment
04/22/2020
4375330
Objective Failure D.1 During Full PI Drill
10/08/2020
4396529
Unit 3 570' Reactor Chemistry Sample Panel Leak
01/18/2021
4437797
Failed DCs and Sat w/Comments for 2021 NRC Graded
Scenario
07/29/2021
4453508
Security - Emergency Response to Site in PA
10/17/2021
4453866
4.0 Critique - TR3 Failure and 63 SCRAM
10/19/2021
4454026
MCR EONS Transmittal Issue
10/19/2021
4454286
EP Critique/ Lessons Learned from Unusual Event
Declaration
10/20/2021
4468795
4Q2021 Dresden CR/SIM/TSC/OSC Equipment Issues
2/29/2021
Radiological Emergency Plan Annex for Dresden Station
Addendum 3
Emergency Action Levels for Dresden Station
Miscellaneous
Dresden Station Radiological Emergency Plan
RP Training: New SCBA Equipment Implement Beginning
22
03/29/2021
Corrective Action
Documents
Suspected H2 Leak Causing CO Monitors to Alarm
11/17/2021
Controlled Negative Pressure (CNP) Fit Testing
Monthly Inspection and Maintenance of MSA Firehawk Mask
Mounted Regulator SCBAs
Procedures
RP-DR-832
Operation of the Mako Air Compressor and The Mako
Stationary Containment Fill Station (SCFS)
Corrective Action
Documents
Investigation Whole Body Count Performed
01/28/2022
Corrective Action
Documents
Resulting from
Inspection
NRC ID: DPW Documentation
2/12/2022
Procedures
Prenatal Radiation Exposure
Radiation
Whole Body Count InVivo Analysis
01/28/2022
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Surveys
Attachments 3-5
Declaration of Pregnancy Forms
01/21/2021
NRC Performance Indicator Data: Initiating Events -
Unplanned Power Changes per 7000 Critical Hours
01/01/2021 -
2/31/2021
Miscellaneous
NRC Performance Indicator Data: Initiating Events -
Unit/Reactor Shutdown Occurrences
01/01/2021 -
2/31/2021
Monthly Data Elements for NRC/WANO Unit/Reactor
Shutdown Occurrences
71151
Procedures
Monthly Data Elements for NRC Unplanned Power Changes
per 7000 Critical Hours
4461720
Transformer 3 Trouble
11/18/2021
4470594
Missed Opportunity for Thermography Data Analysis
01/07/2022
Corrective Action
Documents
4471962
2B West LPCI Room Cooler Leaking
01/14/2022
Corrective Action
Documents
Resulting from
Inspection
4446558
Receipt of NRC 2Q2021 Inspection Report
11/18/2021
Procedures
Issue Identification and Screening Process
11