IR 05000317/2025010
| ML26008A096 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 01/08/2026 |
| From: | Jason Schussler Division of Operating Reactors |
| To: | Mudrick C Constellation Energy Generation, Constellation Nuclear |
| References | |
| Download: ML26008A096 (0) | |
Text
January 8, 2026
SUBJECT:
CALVERT CLIFFS NUCLEAR POWER PLANT, UNITS 1 AND 2 - BIENNIAL PROBLEM IDENTIFICATION AND RESOLUTION INSPECTION REPORT 05000317/2025010 AND 05000318/2025010
Dear Christopher Mudrick:
On December 1, 2025, the U.S. Nuclear Regulatory Commission (NRC) completed a problem identification and resolution inspection at your Calvert Cliffs Nuclear Power Plant, Units 1 and 2, and discussed the results of this inspection with Peter Moodie, Site Vice President, and other members of your staff. The results of this inspection are documented in the enclosed report.
The NRC inspection team reviewed the stations problem identification and resolution program to confirm that the station was complying with NRC regulations and licensee standards. Based on the samples reviewed, the team determined that your program complies with NRC regulations and applicable industry standards such that the Reactor Oversight Process can continue to be implemented.
The team also evaluated the stations effectiveness in identifying, prioritizing, evaluating, and correcting problems, reviewed licensee audits and self-assessments, and its use of industry and NRC operating experience information. The results of these evaluations are in the enclosure.
Finally, the team reviewed the stations programs to establish and maintain a safety-conscious work environment and interviewed station personnel to evaluate the effectiveness of these programs. Based on the teams observations and the results of these interviews, the team found no evidence of challenges to your organizations safety-conscious work environment. Your employees appeared willing to raise nuclear safety concerns through at least one of the several means available.
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, Jason E. Schussler, Team Leader Technical Support and Administrative Team Division of Operating Reactor Safety Docket Nos. 05000317 and 05000318 License Nos. DPR-53 and DPR-69
Enclosure:
As stated
Inspection Report
Docket Numbers:
05000317 and 05000318
License Numbers:
Report Numbers:
05000317/2025010 and 05000318/2025010
Enterprise Identifier: I-2025-010-0008
Licensee:
Constellation Energy Generation, LLC
Facility:
Calvert Cliffs Nuclear Power Plant, Units 1 and 2
Location:
Lusby, MD
Inspection Dates:
September 15, 2025 to December 1, 2025
Inspectors:
T. Daun, Senior Resident Inspector
N. Floyd, Senior Reactor Inspector
A. Tran, Senior Resident Inspector
A. Christiano, Resident Inspector
Approved By:
Jason E. Schussler, Team Lead
Technical Support and Administrative Team
Division of Operating Reactor Safety
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a biennial problem identification and resolution inspection at Calvert Cliffs Nuclear Power Plant, Units 1 and 2, 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
Type Issue Number Title Report Section Status CAPR 05000317/2025010-01 Calvert Cliffs U1 95001 CAPR 04735065-32 (Implement a series of initial and recurring training and behavioral monitoring methods)
71152B Closed CAPR 05000318/2025010-02 Calvert Cliffs U2 95001 CAPR 04788102-35 (Implement technical conscience and technical human performance training)
71152B Closed CAPR 05000318/2025010-03 Calvert Cliffs U2 95001 CAPR 04752936-47 (22 SGFP hard reset strategy assuage existing latent pipe strain)
71152B Closed CAPR 05000318/2025010-04 Calvert Cliffs U2 95001 CAPR 04788102-36 (Perform Technical Conscience observations)
71152B Closed
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.
OTHER ACTIVITIES - BASELINE
71152B - Problem Identification and Resolution Biennial Team Inspection (IP Section 03.04)
- (1) The inspectors performed a biennial assessment of the effectiveness of the licensees problem identification and resolution program, use of operating experience, self-assessments and audits, and safety conscious work environment.
- Problem Identification and Resolution Effectiveness: The inspectors assessed the effectiveness of the licensees problem identification and resolution program in identifying, prioritizing, evaluating, and correcting problems. The inspectors also conducted a five-year review of the 125-volt direct current system. The corrective actions for the following non-cited violations and findings were evaluated as part of the assessment: NCV 2025403-01, FIN 2025040-01, NCV 2025001-01, FIN 2024004-04, FIN 2024004-03, NCV 2024004-02, FIN 2024004-01, NCV 2024003-01, FIN 2024010-01, NCV 2024010-04, NCV 2024010-03, NCV 2024002-01, NCV 2024010-02, FIN 2024001-01, NCV 2023004-01, FIN 2023004-02, FIN 2023010-01, NCV 2023050-03, FIN 2023050-01, and NCV 2023050-02.
- Operating Experience: The inspectors assessed the effectiveness of the licensees processes for use of operating experience,
- Self-Assessments and Audits: The inspectors assessed the effectiveness of the licensees identification and correction of problems identified through audits and self-assessments.
- Safety Conscious Work Environment: The inspectors assessed the effectiveness of the stations programs to establish and maintain a safety-conscious work environment.
- The inspectors reviewed the completed corrective actions to prevent recurrence that were opened during IP 95001 Supplemental Inspection (Agencywide Documents Access and Management System (ADAMS)
Accession Number ML24101A261), dated April 11, 2024, associated with a White Notice of Violation in the Mitigating Systems cornerstone and during IP 95001 Supplemental Inspection (ML25149A055), dated May 29, 2025, associated with a White performance indicator in the Initiating Events cornerstone. The inspectors verified the following corrective actions had been completed as scheduled: 04735065-32, 04788102-35, 04752936-47, and 04788102-36. The following corrective actions remained open at the end of the inspection: 04718086-29 (In progress, due 5/1/2026), 04797040-49 (In progress, due 1/30/2026), and 04797040-18 (In progress, due 9/30/2026).
INSPECTION RESULTS
Assessment 71152B Corrective Action Program Effectiveness
The inspectors determined that Constellations problem identification and resolution program at Calvert Cliffs was generally effective in identifying, evaluating, and correcting problems.
Problem Identification: The inspectors reviewed a sample of issues that were processed through Constellations problem identification and resolution program since the last biennial team inspection. The inspectors determined that, in general, the station identified issues and entered them into the corrective action program accurately, timely, and at an appropriately low threshold.
Problem Prioritization and Evaluation: Based on the samples reviewed, the inspectors determined that, in general, Constellation appropriately prioritized and evaluated issues commensurate with the safety significance of the identified problem. Constellation appropriately screened issue reports (IRs) for operability and reportability, categorized IRs by significance, and assigned actions to the appropriate department for evaluation and resolution.
Corrective Actions: The inspectors determined that the overall problem identification and resolution program performance related to resolving problems was effective. In most cases, Constellation developed and implemented corrective actions to resolve problems in a timely manner. Inspectors noted a trend of items deemed low priority by the work management system not being addressed. This was evident by the large number of deficient items being tracked on the main control boards and work management backlog. Inspectors noted that the station has taken steps to increase the occurrence of cross-functional reviews between work management, the fix it now team, and system engineering to validate priorities and assess the aggregate impacts of these deficiencies.
Assessment 71152B Use of Operating Experience
The inspectors determined that, in general, Constellation appropriately evaluated industry operating experience for its relevance to Calvert Cliffs and appropriately incorporated both internal and external operating experience into plant procedures and processes.
Assessment 71152B Self-Assessments and Audits
The inspectors reviewed a sample of self-assessments and audits performed by both Nuclear Oversight and individual departments and determined that Constellation had an effective self-assessment and audit process. In general, self-assessments and audits appropriately assessed performance and identified performance trends, issues of regulatory significance, and areas for improvement.
Assessment 71152B Safety-Conscious Work Environment
The inspectors interviewed individuals across various organizations to evaluate the willingness of licensee staff to raise nuclear safety issues and to assess the perceived effectiveness of the corrective action program at resolving identified problems. Interviewees included staff and managers from Operations, Engineering, Maintenance, Security, Radiation Protection, Chemistry, Emergency Preparedness, Organizational Effectiveness, and the Employee Concerns Program. All interviewees indicated that they would raise safety concerns, they were trained and proficient on initiating IRs, and they felt their management was receptive to receiving safety concerns. Most indicated they were aware of the licensees Employee Concerns Program and would be willing to use it if needed. None of the interviewees stated that they had experienced or heard of an instance of retaliation for raising safety issues. The inspectors determined that the conditions at Calvert Cliffs appeared to be conducive to a safety-conscious work environment. No indications of reluctance to report safety issues were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified that no proprietary information was retained or documented in this report.
- On December 1, 2025, the inspectors presented the biennial problem identification and resolution inspection results to Peter Moodie, Site Vice President, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
1700125
4/6/2011
25806
2CV4260 REQUIRES FURTHER INVESTIGATION DUE TO
LLRT RESULT
3/3/2019
25806
2CV4260 REQUIRES FURTHER INVESTIGATION DUE TO
LLRT RESULT
3/3/2019
262989
System Engineering Action Tracking
07/10/2019
274667
Pipe Encapsulation/Sleeves Not Allowing FAC Inspections
8/27/2019
291034
Evaluate pathway/receptor Changes to ODCM per land use
data
10/24/2019
4336032
OPD SA - Editorial Corrections Required for Open Phase
Calcs
7/8/2021
4382777
11/6/2020
4419617
Create WO to Install Permanent Flow Site for U1 SDC
04/28/2021
4419618
Create WO to Install Permanent Flow Site for U2 SDC
04/28/2021
4435379
Boric Acid Deposit - 2FT4148
7/16/2021
4456179
4Q23 NRC Green NCV: Failure to Control Transient
Combustibles
2/9/2024
23943
4.0 Critique of Section 2's Unannounced Fire Drill
9/22/2022
4550611
Fire Loading Calculations and Permanent Storage Areas
1/26/2023
4559548
CH 'D" WRNI Start Up Rate
03/05/2023
4676524
9/29/2023
4677916
1-SS-103012, 1A2 DG Speed Field Flash Brass Cover
Missing
9/29/2023
4679344
NOS ID FINDING: LLRW drums stored long term in
warehouse
8/30/2024
4697446
PART 21-Non-Compliant Insulated Conductor (RSS)
9/12/2024
4698781
Trend IR for sporadic T-Cold indications CAPE
8/27/2023
4704844
Unit 2 Reactor Trip
10/10/2024
4705896
09/29/2023
4711732
NOS ID: Alternative CST Makeup procedure had
discrepancies
10/23/2023
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
4713610
10/30/2023
4714585
2A EDG Jacket Cooling Water Leak
11/1/2023
4714856
NRC Identified: Eval of MET towers instrument not complete
11/02/2023
4715671
Physical Security
11/6/2023
4715705
NRC ID PI&R: Potential Green NCV Met Tower trees
11/06/2023
4716036
U2 AUTOMATIC REACTOR TRIP DUE TO U-4000-22
DEENERGIZED
11/7/2023
4716203
4Q24 NRC Green Finding: EDRIP Mod Gaps re ABB
breakers
2/6/2025
4716745
Battery Charger Tripped
11/10/2023
4717171
3/13/2024
4718086
U2 AUTOMATIC REACTOR TRIP DUE TO U-4000-22
DEENERGIZED
11/16/2023
4718884
NRC identified Green Finding Met Tower Vegetation
11/20/2023
20411
SW PP Forward Flow Test
11/29/2023
20516
2J105 and 2J108 sprayed with water
11/30/2023
20938
TRNG - DEP Failure during Cycle 23-6 Evaluated Scenario
2/01/2023
21289
Physical Security
2/3/2023
21352
2J105 and 2J108 sprayed with water
11/30/2023
21829
Indication of leak by on steam supply CV's for U2 AFW PP's
2/6/2023
22773
Degraded zip ties in the spent fuel pool.
2/11/2023
25115
29BA Protectowire Panel Batteries Found Degraded
2/4/2023
27681
2/25/2025
4730313
CAL-20240104-293 - NRC ID DEGRADED DOOR LATCH &
HANDLE
1/12/2024
4730754
Physical Security
1/13/2024
4730795
Physical Security
1/13/2024
4730809
Physical Security
1/13/2024
4730916
1-SI-148, 12B SI HDR CKV failed acceptance criteria
1/14/2024
4731462
Physical Security
1/16/2024
4731471
Physical Security
1/16/2024
4731480
Physical Security
1/16/2024
4731484
Physical Security
1/16/2024
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
4731492
Physical Security
1/16/2024
4731562
Indication of leak by on steam supply CV's for U2 AFW PP's
2/6/2023
4732060
1-SI-148, 12B SI HDR CKV failed acceptance criteria
1/14/2024
4735087
Physical Security
11/30/2023
4749043
4Q23 NRC Green NCV: Failure to Control Transient
Combustibles
2/9/2024
4749049
4Q23 NRC Green Finding: Failure to Implement Required
Controls
2/9/2024
4749837
Medium packing leak on 0-FP-775 U-1 13.8 KV DEG
2/13/2024
4749919
NRC ID: 12 Chg Pump Oil on the floor
2/13/2024
4750234
Medium packing leak on 0-FP-775 U-1 13.8 KV DEG
2/13/2024
4751320
Physical Security
2/19/2024
4752806
Battery Charger Tripped
11/10/2023
4752936
NRC ID: Observation of use of cups to protect equipment
2/14/2024
4755563
SGFP did not ramp to 3400 RPM for post trip.
3/5/2024
4757689
Received Alarm "13 HPSI PUMP SIAS BLOCKED AUTO"
5/4/2024
4759533
Unit 2 Reactor Trip
2/24/2024
4765383
Trend IR for Main Power Transformer Cable failures (WGE)
4/11/2024
4766098
Indication of RV-201 leakage during startup
3/22/2025
4769842
1HVSW-395, valve disc and stem separated
1/9/2024
4769849
Trend: Unit 1 Charging Pump Performance
4/26/2024
4771989
Received Alarm "13 HPSI PUMP SIAS BLOCKED AUTO
START"
5/4/2024
4771989
Cable failure during Tan-Delta testing
5/30/2024
4772453
AFW PP OB sample darkm oil ring misplaced WGE
5/7/2024
4772631
fuel movement error during spent fuel pool moves
05/07/2024
4773328
Security Diesel generator cells low on water
5/10/2024
4773341
Inadequate closure of CA Assignments
5/10/2024
4777577
Cable failure during Tan-Delta testing
5/30/2024
4780069
Crit PMs late in grace due to parts unavailability
11/8/2023
4780279
Spurious Trip of hi containment pressure TU-9 on RPS CH
"A"
06/12/2024
4781971
Fitness for duty site trending
6/20/2024
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
4787211
Rollup IR for 2024 NRC Age Related Degradation Inspection
6/11/2024
4788102
U2 Reactor Trip
07/18/2024
4791041
Excessive Vibration of 2A EDG Clean Drain Header
7/31/2024
4791373
NRC ID Green Finding SW PP Supp Bolts ISI Exam Gaps
8/2/2024
4791376
NRC ID Green Finding: SW Pump OPEVAL
8/2/2024
4791377
U-1 Containment RMS HI Range dropping low 1RI5417A
7/31/2025
4792241
NRC ID Green Finding Overhaul Procedure Steps Missing
8/2/2024
4797040
exceeded Threshold for Unplanned Scrams NRC PI - Unit 2
08/27/2024
4798151
NOS ID: Temporary shielding evaluations were not
performed
11/4/2024
4801182
PART 21-Non-Compliant Insulated Conductor (RSSC dba
Marmom)
9/12/2024
4801303
Error in the Calc. of Decalibrated Excore Power
09/12/2024
4803371
Flex portable generator issues
11/20/2024
4806446
2-AFW-4531 failed to SHUT per STP O-5ACV-2
10/03/2024
4808059
NOS identified issues were not properly dispositioned
1/16/2024
4808192
Potential Green Finding for Control of Combustibles
2/16/2024
4813527
10/30/2024
4815004
NRC ID: SGFP failures not screened for CCF status
2/20/2024
4817926
Physical Security
11/16/2024
4818336
Unit 1 FWH ECTs identified excessive pitting in tubes
2/24/2024
4818751
IRs 04462401and 04755563 not classified as SL2
1/14/2025
22039
2-SI-324 Knocker separated from valve
3/24/2025
24057
Fire Protection Equipment Testing
3/3/2025
25272
Fire Protection Equipment Testing
3/3/2025
25272
NRC ID: SGFP failures not screen for CCF
2/20/2024
29579
NOS ID: Temporary M&TE not screened for 50.59
4/24/2025
4830047
U1 Containment High Range Detector 1-RI-5317B alarmed
1/16/2025
4835224
NRC ID Green Finding Failure Meet ASME IST
Requirements
8/7/2024
4835232
4Q24 NRC Green Finding: Fail to Correct FW sys RTO
response
2/06/2025
4839408
Unable to raise speed on 1A DG while attempting to parallel
2/21/2025
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
WGE
4840171
2/25/2025
4841661
Unit 2 Loss of Shutdown Cooling RCR
3/1/2025
4842240
Late Identified need for Engineering for WO C93823003
2/22/2023
4847922
Indication of RV-201 leakage during startup CAPE
3/22/2025
4848452
AFW Pp Excessive Thrust
2/6/2024
4852951
Physical Security
4/3/2025
4858186
TRNG - DEP Failure during Cycle 25-2 OBE
04/15/2024
4859617
NRC Cyber 2025
4/23/2025
4859912
APPENDIX R LIGHTS FAILED
1/17/2024
4861997
U2 CEDM 36 Upper Gripper Coil is Degraded or Failed
4/30/2025
4862635
1Q25 NRC Green Finding/NCV: U-2 Loss of shutdown
cooling
05/02/2025
4869988
Physical Security
6/1/2025
4874479
Physical Security
6/19/2025
4876510
Physical Security
6/26/2025
4887531
U1 Containment High Range Detector 1-RI-5317B failed
1/16/2025
4889959
Physical Security
8/12/2025
4896460
NRC ID 95001 Self-Revealed Finding VLSS (Green)
Identified
09/10/2025
490088
NRC ID: ESR not referenced in 22 SGFP IR 04755563
09/23/2025
Corrective Action
Documents
Resulting from
Inspection
4897275
NRC ID: Self-Assessment completed without required
template
4898343
NRC ID: Insufficient Document Of Corrective Action
09/16/2025
4898684
Active Boric Acid Leak on 2-FT-4148
9/17/2025
4898899
NRC ID: cable tie wrapped to SR instrument line
09/18/2025
4899736
Pl&R Review for CAPR 04780069-21
9/18/2025
4899776
NRC ID: Pl&R CAPE 04753992 (Loss of 11 13kV Bus)
Revision
9/20/2025
4900513
NRC ID: Inadequate CA closure (4559548-39)
09/25/2025
4900954
NRC P&IR: WGE credits ACIT for CA
09/26/2025
4901405
NRC ID: Action closure did not match action required
09/29/2025
Drawings
60727SH0001
Diesel Generator Cooling Water, Starting Air, Fuel, & Lube
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Oil Diesel No. 2A
60727SH0002
Diesel Generator Cooling Water, Starting Air, Fuel, & Lube
Oil Diesel No. 1B
Procedures
CC-CA-118
Calver Cliffs Implementation of Diverse and Flexible Coping
Strategies (FLEX)
Boric Acid Corrosion Control (BACC) Program Identification,
Screening, and Evaluation
MA-AA-716-010-
1103
Fluid Sealing Technology Program
Quality Assurance Topical Report
OI-21B
1B Diesel Generator
Operator Work-Around Program
MCR Equipment Deficiency Management
Equipment Deficiency Identification and Documentation
OP-AA-108-105-
1001
MCR and RWCR Equipment Deficiency Management and
Performance Indicator Screening
Control of Transient Combustible Material
Performance Monitoring and Analysis Manual
Safety Culture Monitoring
Issue Identification and Screening Process
Corrective Action Program (CAP) Procedure
Root Cause Analysis Manual
Corrective Action Program Evaluation Manual
Effectiveness Review Manual
Corrective Action Review Board (CARB) Procedure
Self-Assessments
Work Screening and Processing
Self-Assessments 04707235-44
23 OPEX Review - SOE 23-006 Robinson
11/22/2023
04776496
CCNPP Vulnerability Based on Industry OPEX (IRIS 577176) 12/6/2023
04780069-35
Self-Assessment for Issues Identified from 2024 NRC ARD
Inspection
2/13/2023
04815579
MFRV Dual Positioner - Controller Failure Test
2/15/2023
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
04823538-04
Perform 10CFR Part 21 applicability / evaluation IAW
procedure
2/18/2023
04838471
Site Engineering to review actions and determine impact on
any plant equipment
2/21/2023
4340238-14
operator fundamentals self assessment
2/30/2022
47500500
NOSA-CAL-24-02 Calvert Cliffs Emergency Preparedness
Audit
04/24/2024
4803371
Problem Identification and Resolution Assessment Plan
8/7/2025
NOSA-CAL-23-03 External Events and Emergency Operations Audit Report
11/01/2023
NOSA-CAL-24-04 Engineering Design Control Audit Report
07/17/2024
Work Orders
61602914
BACC: Dry Inactive Boric Acid on 2FT4148
09/17/2025
C91970737
LPMS CHANNEL 1 DISPLAY INDICATES FAILED
SENSOR.
08/10/2012
C92588369
LINEAR RANGE NI CHANNEL B DISPLAY ASSEMBLY
03/04/2014
C93790592
STP M-350-2, #22 Station Battery Quarterly Check
7/5/2022
C93790740
25 VDC Battery #14, Quarterly Checks
07/20/2022
C93792340
STP M-352-2, #21 Station Battery Quarterly Check
7/23/2022
C93813206
Unit 2 AFW System Suction Press Low Alarming Early
11/23/2021
C93819704
Low Oil level Alarm for 13 Charging pump
1/10/2022
C93827561
2-LIA-1565 (22 SRW Head tnk) drifting high into alarm
3/18/2022
C93848662
REPLACE PRIMARY RTD CONNECTOR O-RING
06/13/2022
C93854278
2LIA5603 (21 CST Level) Does not initiate low level alarm
7/27/2022
C93909020
Unit 2 received spurious 2C05 D-40 "TAVE-TREF" alarm
4/7/2023
C93936282
INSPECT / TEST Security Diesel Generator Battery
07/23/2023
C93939814
REPLACE all RPS RTD connector o-rings and
REPLACE/REWORK selected wiring harness/conduit/cable
08/28/2023
C93945900
U2 RPS Ch C Trip Unit 1 Trip and Pre-trip lights failed
10/16/2023
C93976613
Security diesel generator battery cells low on water
05/13/2024
C93984386
alarm H-2 on 1C09, 11A SIT LVL, alarms constantly
7/12/2024
C94021288
Unexpected actuation of RPS Ch 'A' Trip Unit 1
5/30/2025
C94994555
2-AFW--4531 failed to SHUT per STP O-005ACV-2
10/03/2024