IR 05000282/2021011: Difference between revisions

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=Text=
=Text=
{{#Wiki_filter:June 3, 2021
{{#Wiki_filter:
 
==SUBJECT:==
PRAIRIE ISLAND NUCLEAR GENERATING PLANT - BIENNIAL PROBLEM IDENTIFICATION AND RESOLUTION INSPECTION REPORT 05000282/2021011 AND 05000306/2021011
 
==Dear Mr. Domingos:==
On April 30, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed a problem identification and resolution inspection at your Prairie Island Nuclear Generating Plant and discussed the results of this inspection with you and other members of your staff. The results of this inspection are documented in the enclosed report.
 
The NRC inspection team reviewed the stations corrective action program and the stations implementation of the program to evaluate its effectiveness in identifying, prioritizing, evaluating, and correcting problems, and to confirm that the station was complying with NRC regulations and licensee standards for corrective action programs. Based on the samples reviewed, the team determined that your staffs performance in each of these areas adequately supported nuclear safety.
 
The team also evaluated the stations processes for use of industry and NRC operating experience information and the effectiveness of the stations audits and self-assessments.
 
Based on the samples reviewed, the team determined that your staffs performance in each of these areas adequately supported nuclear safety.
 
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,
/RA/
Hironori Peterson, Chief Branch 3 Division of Reactor Projects Docket Nos. 05000282 and 05000306 License Nos. DPR-42 and DPR-60
 
===Enclosure:===
As stated
 
==Inspection Report==
Docket Numbers: 05000282 and 05000306 License Numbers: DPR-42 and DPR-60 Report Numbers: 05000282/2021011 and 05000306/2021011 Enterprise Identifier: I-2021-011-0037 Licensee: Northern States Power Company, Minnesota Facility: Prairie Island Nuclear Generating Plant Location: Welch, MN Inspection Dates: April 11, 2021 to April 30, 2021 Inspectors: A. Anderson, Physical Security Inspector B. Jose, Senior Reactor Inspector J. Park, Reactor Inspector K. Pusateri, Resident Inspector N. Shah, Project Engineer Approved By: Hironori Peterson, Chief Branch 3 Division of Reactor Projects Enclosure
 
=SUMMARY=
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting a biennial problem identification and resolution inspection at Prairie Island Nuclear Generating Plant, in accordance with the Reactor Oversight Process. The Reactor Oversight Process is the NRCs program for overseeing the safe operation of commercial nuclear power reactors. Refer to https://www.nrc.gov/reactors/operating/oversight.html for more information.
 
===List of Findings and Violations===
 
No findings or violations of more than minor significance were identified.
 
===Additional Tracking Items===
None.
 
=INSPECTION SCOPES=
 
Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.
 
Starting on March 20, 2020, in response to the National Emergency declared by the President of the United States on the public health risks of the Coronavirus Disease (COVID-19), regional inspectors were directed to begin telework. During this time regional baseline inspections were evaluated to determine if all or portions of the objectives and requirements stated in the IP could be performed remotely. In some cases, portions of an IP were completed remotely and on-site.
 
The inspection documented below was determined that the objectives and requirements stated in the IP could be completed remotely.
 
==OTHER ACTIVITIES - BASELINE==
 
===71152B - Problem Identification and Resolution Biennial Team Inspection (IP Section 02.04) ===
{{IP sample|IP=IP 71152|count=1}}
: (1) The inspectors performed a biennial assessment of the licensees corrective action program (CAP), use of operating experience, self-assessments and audits, and safety-conscious work environment.
* CAP Effectiveness: The inspectors assessed the CAPs effectiveness in identifying, prioritizing, evaluating, and correcting problems. The inspectors also conducted a five-year review of the Unit 1 and 2 emergency diesel generators (EDGs).
* Operating Experience, Self-Assessments and Audits: The inspectors assessed the effectiveness of the stations processes for use of operating experience, 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.
 
==INSPECTION RESULTS==
Assessment                                                                            71152B Review of Corrective Action Program Based on the samples reviewed, the team determined that the licensee's performance in each of these areas adequately supported nuclear safety.
 
Effectiveness of Problem Identification Overall, the station was effective at identifying issues at a low threshold and properly entering them into the CAP as required by station procedures. The team determined that the station was effective at identifying negative trends that could potentially impact nuclear safety. The inspectors interviewed personnel, reviewed documents, walked down portions of the plant, and assessed licensee problem identification.
 
The team identified that in January 2021, the licensee had missed an opportunity to identify a condition adverse to quality (CAQ) after several safety-related components were affected by ongoing leakage from the A cooling water supply strainers. Several issues were written (CAP items 501000048188, -46948, and -48109) documenting the leakage, but none addressed the wetting of nearby safety-related components. Ironically, barriers had been set up to prevent further wetting, even though no CAP item was written. After the inspectors raised this concern, CAP item 501000049622 was issued by the licensee to address the wetted equipment. The licensee determined that the affected equipment was operable and the inspectors identified no immediate safety concerns.
 
Effectiveness of Prioritization and Evaluation of Issues:
ln-depth reviews of a risk-informed sampling of CAP items, work orders (WOs), and cause evaluations were completed. Issue identification and screening was generally good, based on a review of CAP documents and observations of CAP screening, Protective Action Review Board, Plant Operating Review Committee and Plant Health Committee meetings. For these meetings, the inspectors observed that the meeting logistics (quorum, etc.) were enforced and that attendees were prepared and asked good questions. The inspectors observed that the issues were generally being appropriately prioritized and evaluated for resolution, and that the corrective actions (CAs) were implemented to mitigate the risk of issues occurring that could affect overall system operability and/or reliability.
 
The inspectors noted that while issue evaluations were generally sound, there were several examples where additional research was needed to understand the technical basis and final resolution, primarily due to a lack of clear documentation. This issue had previously been identified in past NRC inspections and licensee self-assessments, most recently in the April 2021 licensee self-assessment conducted in preparation for this inspection. The inspectors noted that the licensee had documented this issue in the CAP and was taking corrective actions.
 
The inspectors also identified several examples where CAP program requirements as stated in FP-PA-ARP-01, "CAP Process," had not been followed; however, these examples did not result in an inappropriate handling of CAQs or other significant CAP issue. These examples included:
* CAP item 50100023754, "Ground Resistors undersized for EDGs" had four recommendations which were not made into actions under the CAP nor was there any discussion on how they were being addressed. One of these recommendations was later cancelled based on the risk, even though this risk assessment was not documented. The licensee documented this issue as CAP item 501000050714;
* CAP item 500000303858, which was associated with root cause evaluation 501000035531, "Repetitive Corrosion Induced Failures, was to perform a Snapshot assessment; however, this assessment was not completed. The licensee documented this issue as CAP item 501000050482;
* Three CAs for CAP item 501000036932, which was associated with a root cause evaluation for an undersized beaker being installed on one of the EDGs, were inappropriately closed to actions taken, instead of remaining open until the actions were verified completed.
 
The licensee documented this issue as CAP item 501000050896; and
* CAP item 501000049074 D2 LO STRNR Leak; did not follow the administrative requirements of FP-OP-ACM-01 Adverse Condition Monitoring Plan Process to track an instance of Adverse Condition Monitoring (ACM). The licensee documented this issue as CAP item 501000051144.
 
As with the documentation issues previously discussed, the inspectors noted that this was also a continuing issue identified in April 2021, and earlier licensee self-assessments, for which CAs had been taken.
 
Effectiveness of Corrective Actions:
The team concluded that the licensee was generally effective in developing CAs that were appropriately focused to correct the identified problem and to address the root and contributing causes for significant issues in order to preclude repetition. The licensee generally completed CAs in a timely manner and in accordance with procedural requirements commensurate with the safety significance of the issue. For NRC identified issues, the team determined that the licensee generally assigned CAs that were effective and timely.
 
However, the inspectors noted that there was no clear basis for documenting the risk basis for due date extension. Attachment 8 of CAP procedure FP-PA-ARP-01, "CAP Process,"
required that "an assessment of the risk associated with extending the Activity," be documented as part of the due date extension; however, this procedure did not describe how this requirement should be met. The inspectors identified several examples where the risk assessment was lacking, in that it could not be determined how the assessor concluded that there was no risk. For example, CAP 501000023754 re: an issue with emergency diesel generator grounding resistors had "none" under the risk justification for the due date extension without any further detail. After additional information was provided by the engineering staff, the inspectors were subsequently able to conclude that the justification was supported. The inspectors were concerned with how management approval of the due dates was considered, absent a clearly documented risk basis, and how any future justifications could be properly evaluated, absent the previous documented risk assessment. Although the inspectors were able to determine that the risk assessment was appropriate for the items reviewed, this lack of documentation was a concern as discussed. The licensee documented this concern as CAP item 501000050871.
 
No violations or findings were identified.
 
Assessment                                                                            71152B The inspectors performed an expanded 5-year review of the Units 1 and 2 EDGs; specifically, by performing system walk-downs and evaluating condition reports, engineering changes, and WOs. Overall, the inspectors determined that the licensee was effectively managing issues associated with this system.
 
No violations or findings were identified.
 
Assessment                                                                            71152B The inspectors reviewed operating experience (OpE) captured in the CAP and sampled OpE from NRC, industry, vendors, and third-party groups. Overall, for the samples selected, the OpE was appropriately screened and evaluated for applicability, and was effectively used by the station. It was also noted that it was properly considered as a potential precursor in issue evaluations, and during interviews and observations of daily plant meetings, the inspectors concluded that it was seen as a useful learning tool and being used appropriately in daily plant activities.
 
Nuclear Oversight audits and department self-assessments were generally of good quality, thorough and critical with identified issues being properly dispositioned in the CAP. The audits and assessments were performed in accordance with licensee procedures. Of note, the inspectors observed that the overall conclusions of the licensees self-assessment of the CAP program done prior to this NRC inspection, was consistent with the inspectors observations.
 
No violations or findings were identified.
 
Assessment                                                                            71152B The inspectors observed various station meetings, including those in which new CAP items were reviewed, and interviewed a representative cross-section of station personnel.
 
Additionally, the inspectors interviewed the Employee Concerns Program Coordinator, reviewed recent case logs and case files and inquired about the program during interviews with station personnel.
 
Overall, there is a strong safety culture at the site. Workers felt encouraged to identify issues and felt encouraged to use the CAP. Generally, there was a feeling that issues would be evaluated and corrected. Generally, workers felt that that station management had taken reasonable measures to ensure that focus remained on safe operation and engagement, even given the circumstances due to COVID.
 
The licensee's 2020 USA safety culture survey identified a potential issue with Knowledge Transfer at the site affecting several departments, including maintenance and engineering.
 
This issue was captured in the CAP and several actions were underway to address this. The team did not have any issue with the actions proposed, but it is too early to assess their effectiveness.
 
No violations or findings were identified.
 
==EXIT MEETINGS AND DEBRIEFS==
The inspectors verified no proprietary information was retained or documented in this report.
* On April 30, 2021, the inspectors presented the biennial problem identification and resolution inspection results to you and other members of the licensee staff.
 
=DOCUMENTS REVIEWED=
 
Inspection Type              Designation  Description or Title                                    Revision or
Procedure                                                                                          Date
71152B    Corrective Action 500000309985  Modify FP-S-FSIP-17: Security Program to Evaluate Need  12/23/2020
Documents                      for Additional Training Evolutions for Strategy Changes
500001184867  Adverse Trend in 11 Battery Jar/Cover Leakage          06/08/2009
500001192499  Nuclear Safety Advisory Letter RAOC Technical          08/06/2009
Specification Actions
500001227543  MS Snubbers Overloaded - Torsional Acceleration        04/16/2010
500001238619  12" MS Piping Added to High Energy Line                06/23/2010
500001494324  Potential Operable but Non-Conforming D5/D6 Fuel Oil    09/23/2015
Day Tank
500001553539  Issues with the Results Obtained for New Battery        03/30/2017
Calculations
5010000023859 Unit 1 EDG Unavailability Question                      05/28/2019
501000007086  Main Steam Valve Maintenance Has AFW MSPI Impact        01/10/2018
501000007811  D2 Lockout During Slow Start Test                      01/29/2018
501000011209  Battery 21 Has Misaligned Separator Plate              04/25/2018
501000012189  Identification of Latent OE Trend                      05/20/2018
501000012293  Residual Heat Removal Flood Barriers Compensatory      12/03/2018
Measures
501000016536  Unacceptable Void Found in 2RH-11                      02/04/2020
501000022183  Fuel Oil Leak on 2EG-9-53 Increased Rate                01/20/2019
501000022281  FW SYS Hanger Snubber Leaking 1-FWH-40B                01/23/2019
501000023141  EEQ DBAI; Motor Operated Valve (MOV) Grease Grading    03/07/2019
Criteria in Procedure D70.1
501000023875  2019 Problem Identification and Resolution Non-CAQ      03/20/2019
Items for Rescreening
501000023915  2019 NRC Ultimate Heat Sink Auxiliary Feedwater Room    03/06/2019
UC DP Testing
501000023925  ACE; 2019 NRC Ultimate Heat Sink (UHS) Inspection:      04/05/2019
Auxiliary Feedwater Room Cooler Heat Exchanger
Differential Pressure Testing
501000024755  Apparent Cause Evaluation (ACE); Breaker 221B-27 A      06/21/2019
Phase Will Not Close
Inspection Type Designation  Description or Title                                  Revision or
Procedure                                                                          Date
501000025116 ACE; 121 Motor Driven Cooling Water Pump (MDCLP) as  05/30/2019
Found Condition - Motor Vibration High
501000025908 1Q2019 Violation - 12 DDCLP Jacket Water              04/19/2019
501000026390 CL Piping Vulnerability - MIC                        04/26/2019
501000026633 11 FW Pump Outboard Oil Leak                          05/01/2019
501000027914 Received Multiple Unexpected Alarms                  05/29/2019
501000028820 NRC Inspector Observations WC System                  06/21/2019
501000028971 Potential U1 RCS Flow Anomaly                        05/25/2019
501000029823 CV-31209 Failed PMT                                  07/20/2019
501000030520 ACE; Potential Diaphragm Degraded on MV-32410        09/16/2019
501000031008 Missing Recommended Actions in LMP                    08/21/2019
501000031076 ACE; 2019 AFI ER.1, Equipment Reliability - Emergency 10/15/2019
Diesel Generators (EDGs)
501000031220 Snubber PI-335 Failed As-Found Test                  08/26/2019
501000031991 MOVs to Be Rescoped to GL Program                    09/16/2019
501000033223 2MS-15-2 Bonnet Sealing Area Degraded                10/13/2019
501000033230 MSSV RS-21-18 Failed as Found Testing                10/12/2019
501000033699 SV-37465 Venting Continuously Post SI Test            10/22/2019
501000034170 SP 1151B Unsat, Stroke Time CV-31654                  10/30/2019
501000034334 Fuel Oil Leak at 2EG-9-13 Valve Stem                  01/11/2019
501000034334 D5 Fuel Oil Leak at 2EG-9-13 Valve Stem
501000035150 12 MD AFW Pump Did Not Start                          11/26/2019
501000035213 Hole Found in 3" Fuel Oil Supply Line                12/02/2019
501000035531 Repetitive Corrosion Induced Failures                12/10/2019
501000036932 Breaker 26-16 Found Wrong Frame Size                  01/24/2020
501000036932 Root Cause Evaluation (RCE); Breaker Removed from    01/24/2020
Bus 26, Cubicle 26-16 Was Found to Be a 1200 Ampere
Breaker Instead of 2000 Ampere
501000037118 CV-31654 Opening Outside of Reference                01/28/2020
501000037475 Cognitive Trend of MIC Comp Beyond RSL                02/07/2020
501000037993 22 CC PMP Outboard Bearing Oil Leak                  02/22/2020
501000038254 2019 AF-2 Off Track                                  02/29/2021
501000038356 LR Fuel Oil Buried Pipe Inspection Challenge          03/04/2020
Inspection Type Designation  Description or Title                                    Revision or
Procedure                                                                            Date
501000038616 Corrective Action Due Date Extension Not in Accordance  04/29/2020
with FP-PA-ARP-01
501000039650 22 CC HX Temp CV Failed to Control Temp                04/14/2020
501000039958 PMT UNSAT Due to Leak                                  04/23/2020
501000040752 5 DPM Water Drip from 11 TDAFWP CV Stem                05/16/2020
501000041444 Visible Degradation to Auxiliary Feedwater Piping      08/19/2020
501000041819 CV-39409 Stroked Outside the Limit                      06/25/2020
501000041863 Ctrl Rod Lifetime Ext Assumptions                      05/25/2020
501000041973 Roof Leak in 121 CR Chiller Room                        06/30/2020
501000043602 U1 Flux Rate Reactor Trip                              08/26/2020
501000043786 2020 Problem Identification and Resolution Focused Area 09/02/2020
Self-Assessment: A/B Corrective Action Extension
Review
501000044071 PI&R Focused Area Self-Assessment: Adverse Condition    09/11/2020
Monitoring Plan Trending
501000046312 Fire Extinguisher in D4 Room Degraded                  11/03/2020
501000046590 ACE - Players Did Not Respond as Expected - Limited    11/19/2020
Scope Drill; Drill Performance
501000049074 D2 Lube Oil Strainer Leak                              03/03/2021
501000049074 D2 Lube Oil Strainer Cover Leakage
501000050432 Security Zones 5 and 6                                  04/16/2021
501000050460 Security Force Member Annual Physical - Human          04/16/2021
Performance
501000050529 Critical CC Check Valves - No PMs                      04/16/2021
50100022183  Prompt Operability for D6 Fuel Oil Leakage
50100023754  Ground/Resistors Undersized for Emergency Diesel        03/01/2019
Generators
50100031909  D5/D6 Fuel Sulfur Additive Nearly Depleted              09/16/2019
50100042597  NSCA General Observation Continuous Learning CL.4      07/24/2020
50130583    ACE; Fuse Blown During CV-31621 Work                    09/17/2019
606000000560 10CFR50.65(a)(3) Periodic Assessment                    04/01/2020
606000000952 Self-Assessment in Preparation for License Renewal      09/12/2019
Phase 4 Inspection
Inspection Type              Designation      Description or Title                                  Revision or
Procedure                                                                                            Date
606000001078      Focused Self-Assessment: Problem Identification and    04/30/2021
Resolution at Prairie Island Nuclear Generating Plant
609000001541      Training Revision Request                              06/11/2019
60EER1547051      IER L3-16-24 Emergency Diesel Generator
610000000498      ICES 437352 Diesel Generator Air Receiver
610000000632      Westinghouse TB-19-2 Control Rod Drive                05/02/2019
610000001185      OE IRIS 486479; Ultrasonic Inspection on Palisades    03/16/2021
Reactor Vessel Head
610000001211      Operating Experience; Applicability Review of License  03/03/2021
Renewal Interim Staff Guidance 2012-02
61000000691      452168 Diesel Oil Transfer Pump Breaker Failure        06/26/2019
6100000913        501000039063 Monticello Nuclear Generating Plant QIM  06/03/2020
Nuclear Oversight: Monticello Programs Audit Technical
Specifications
610000742        Winter Weather Readiness from NERC                    09/05/2019
61000588881      Clearance and Tagging Inspection Report                09/30/2019
A-DES-PINGP-2020- Nuclear Oversight Audit on Design Control              04/24/2020
QA500000309575    Evaluate Alternate Breaching Simulations              04/15/2021
QA500000311461    Perform Evaluation on T3 IP                            04/15/2021
QIM5010000046590  Players Did Not Respond as Expected During NRC FoF    11/19/2020
Exercise
QIM5010000049332  Human Performance Related Security Loggable Events -  03/09/2021
Perform Common Cause Evaluation
QIM5010000050392, Security Deep Dive on Protected Area Barriers          04/10-
393, 394                                                                12/2021
QIM5010000050463  Security Camera Monitor Malfunction                    04/16/2021
QIM5010000050466  AVBS Control Touch Screen                              04/16/2021
QIM5010000050481  X-Ray Glass Chipped                                    04/16/2021
QIM5010000050490  COVID19 Disinfecting Wipes Causing Hand Geometry      04/14/2021
Errors
QIM5010000050498  Thermal Optic Broken Power Switch                      04/14/2021
Corrective Action 501000050482      2021PIR: Action Not Performed as Written              04/13/2021
Inspection Type          Designation    Description or Title                                    Revision or
Procedure                                                                                          Date
Documents      501000050714    CE 500000294364: Recommendations Not Addressed          04/20/2021
Resulting from 501000050871    PI&R Observation: Opportunity for Improvement            04/22/2021
Inspection    501000051144    Administrative Deficiency via FP-OP-ACM-01              04/27/2021
Engineering    601000001465    Prairie Island Security Upgrades - Change Request        04/15/2019
Changes                        Report
601000001947    Repair Fuel Oil Supply Line for 23 D5
60100001947    Repair Fuel Oil Supply Line for 23 D5 FO                12/02/2019
Miscellaneous                  Units 1 and 2 4th Quarter Mitigating Systems Performance December
Indicator AC Power Submittal                            2020
Emergency Diesel Generator System Health Reports for    02/01/2021
D1, D2 and D5
Procedures    FP-OP-OL-01    Operability                                              Revision 22
FP-PA-ARP-01    CAP Process                                              Revision 59
FP-PA-ARP-01    Issue Report/Change Request Form                        Revision 3
                          (QF0400)
FP-PA-OE-01    Operating Experience Program                            Revision 29
FP-PA-PAR-01    Performance Assessment Review Board and Performance      Revision 18
Assessment Oversight
FP-PA-RMS-01    Risk Management Screening                                Revision 2
FP-S-FSIP-16    Security Training                                        Revision 14
FP-STND-MTG. 01 Fleet Meeting Standards - Participation                  Revision 3
FP-WM-SCH-01    Online Scheduling Process                                Revisions 23
and 24
NSPM-1          Quality Assurance Topical Report                        Revision 14
Self-          500000305009    MM Elevation - Snapshot Assessment                      04/14/2020
Assessments    500000306242    External Surfaces Corrosion SSA                          02/24/2021
606000001079    INPO Mid-Cycle FSA Prairie Island                        08/21/2020
60600000869    SNAPSHOT Report: Self-Assessment on 71130.04,            06/17/2020
Equipment Performance, Testing and Maintenance and
71151, Performance Indicator Verification
60600000906    SNAPSHOT Report: Self-Assessment on 71130.02,            01/20-
Access Control                                          24/2020
60600001360    SNAPSHOT Report: Self-Assessment on 71130.02,            03/29-
Inspection Type        Designation        Description or Title                                Revision or
Procedure                                                                                      Date
Access Control and 71151, Performance Indicator      04/11/2021
Verification
A-INSP/TEST-      2020 Nuclear Oversight Audit of PINGP Inspection and 06/01/2020
PINGP-2020-1      Testing
A-MAINT-PINGP-    2019 NOS Maintenance Audit                          06/10/2019
2019-1
A-PROG-PINGP-      2019 Nuclear Oversight PINGP Audit of Programs      10/01/2019
2019-1
Nuclear Oversight  2019 NOS Audit of PINGP Security (#A-SEC-PING-2019-  07/15-
                      (NOS) Audit Report 1)                                                  26/2019
Nuclear Oversight  2020 NOS Audit of Fleet Security and Cyber Security  07/13-
Audit (NOS) Report (A-SEC-FLT-2020-1)                                  31/2020
Work Orders 700036051          Replace D2 Monal Field Flash dP                      01/12/2021
700036053          Replace D1 Shutdown Pushbutton                      08/15/2018
13
}}
}}

Revision as of 11:12, 17 January 2022

Biennial Problem Identification and Resolution Inspection Report 05000282/2021011 and 05000306/2021011
ML21155A065
Person / Time
Site: Prairie Island  Xcel Energy icon.png
Issue date: 06/03/2021
From: Hironori Peterson
Region 3 Branch 3
To: Domingos C
Northern States Power Company, Minnesota
References
IR 2021011
Download: ML21155A065 (16)


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