IR 05000282/2024002
| ML24211A170 | |
| Person / Time | |
|---|---|
| Site: | Prairie Island  |
| Issue date: | 07/30/2024 |
| From: | Richard Skokowski NRC/RGN-III/DORS/RPB3 |
| To: | Conboy T Northern States Power Company, Minnesota |
| References | |
| IR 2024002 | |
| Download: ML24211A170 (1) | |
Text
SUBJECT:
PRAIRIE ISLAND NUCLEAR GENERATING PLANT - INTEGRATED INSPECTION REPORT 05000282/2024002 AND 05000306/2024002
Dear Thomas Conboy:
On June 30, 2024, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Prairie Island Nuclear Generating Plant. On July 15, 2024, the NRC inspectors 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.
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, Richard A. Skokowski, Chief Reactor Projects Branch 3 Division of Operating Reactor Safety 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: 05000282/2024002 and 05000306/2024002
Enterprise Identifier: I-2024-002-0065
Licensee: Northern States Power Company
Facility: Prairie Island Nuclear Generating Plant
Location: Welch, MN
Inspection Dates: April 01, 2024, to June 30, 2024
Inspectors: T. McGowan, Resident Inspector K. Poolman, Project Engineer K. Pusateri, Resident Inspector J. Reed, Health Physicist D. Tesar, Senior Resident Inspector
Approved By: Richard A. Skokowski, Chief Reactor Projects Branch 3 Division of Operating Reactor Safety
Enclosure
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated 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
Type Issue Number Title Report Section Status URI 05000306/2024001-01 Unresolved Item Associated 71111.18 Closed with Modifications to Motor-Operated Valve Limit Switch
PLANT STATUS
Unit 1 entered the inspection period operating at full-rated thermal power (RTP), except for brief power reductions to perform surveillance testing, or flexible power operations.
On June 12, 2024, at 0930, Unit 1 power commenced an unplanned downpower to approximately 42 percent of RTP for maintenance. On June 20, 2024, at 0100, Unit 1 returned to full RTP where it operated at or near full RTP for the remainder of the inspection period.
Unit 2 entered the inspection period operating at full RTP, except for brief power reductions to perform surveillance testing, or flexible power operations. On May 5, 2024, Unit 2 briefly lowered power to approximately 50 percent RTP for maintenance. On May 8, 2024, at 2000, Unit 2 power was lowered to approximately 42 percent of RTP for maintenance. On May 12, 2024, from 1500 to 1900, Unit 2 power was further lowered to approximately 8 percent RTP for equipment recovery following maintenance, and then returned to approximately 42 percent RTP. On May 15, 2024, at 1240, Unit 2 returned to full RTP where it operated at or near full RTP for the remainder of the inspection period.
INSPECTION SCOPES
Inspections were conducted using the appropriate portions of the inspection procedures (IPs) in effect at the beginning of the inspection unless otherwise noted. Currently approved IPs with their attached revision histories are located on the public website at http://www.nrc.gov/reading-rm/doc-collections/insp-manual/inspection-procedure/index.html. Samples were declared complete when the IP requirements most appropriate to the inspection activity were met consistent with Inspection Manual Chapter (IMC) 2515, Light-Water Reactor Inspection Program - Operations Phase. The inspectors performed activities described in IMC 2515, Appendix D, Plant Status, observed risk significant activities, and completed on-site portions of IPs. The inspectors reviewed selected procedures and records, observed activities, and interviewed personnel to assess licensee performance and compliance with Commission rules and regulations, license conditions, site procedures, and standards.
REACTOR SAFETY
71111.01 - 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 severe weather in the area for the following systems:
entry into AB-2, Severe Weather, on June 17, 2024
Impending Severe Weather Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated the adequacy of the overall preparations to protect risk-significant systems from an impending 3-day severe weather event on May 20, 2024.
71111.04 - Equipment Alignment
Partial Walkdown Sample (IP Section 03.01) (4 Samples)
The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:
- (1) D6 emergency diesel generator standby lineup on April 1, 2024
- (2) 122 bus rooms during 122 control room chiller maintenance on April 22, 2024
- (3) D1 emergency diesel generator standby lineup on May 10, 2024
- (4) 121 spent fuel pool cooling system (protected train) on May 30, 2024
Complete Walkdown Sample (IP Section 03.02) (1 Sample)
- (1) The inspectors evaluated system configurations during a complete walkdown of the 22 turbine-driven auxiliary feedwater (AFW) system on May 21, 2024.
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (5 Samples)
The inspectors evaluated the implementation of the fire protection program by conducting a walkdown and performing a review to verify program compliance, equipment functionality, material condition, and operational readiness of the following fire areas:
- (1) Fire Detection Zone (FDZ) 4, turbine building Unit 1, elevation 679' and 695' on April 1, 2024
- (2) FDZ 74, screenhouse ground floor, elevation 670' on April 9, 2024
- (3) FDZ 75, plant screen house, elevation 695' on April 11, 2024
- (4) FDZ 6, elevation 695', level D2 diesel room on May 6, 2024
- (5) FDZ 46, elevation 715', auxiliary building Unit 2 on May 20, 2024
71111.06 - Flood Protection Measures
Flooding Sample (IP Section 03.01) (1 Sample)
- (1) The inspectors evaluated external flooding mitigation protections in the external flood barriers and underground cables.
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 Unit 2 down power (100 percent to 40 percent) on May 8, 2024.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
- (1) The inspectors observed and evaluated a licensed operator NRC requalification exam on May 21, 2024.
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (2 Samples, 1 Partial)
The inspectors evaluated the effectiveness of maintenance to ensure the following structures, systems, and components (SSCs) remain capable of performing their intended function:
(1) (Partial)main steam isolation valve maintenance procedure evaluation on March 6, 2024
- (2) maintenance rule and in-service testing requirements review on May 1, 2024
- (3) motor-driven auxiliary feedwater pump (MDAFWP) suction and discharge pressure calibrations on May 29, 2024
71111.13 - Maintenance Risk Assessments and Emergent Work Control
Risk Assessment and Management Sample (IP Section 03.01) (5 Samples)
The inspectors evaluated the accuracy and completeness of risk assessments for the following planned and emergent work activities to ensure configuration changes and appropriate work controls were addressed:
- (1) 123 instrument air compressor failure on April 15, 2024
- (3) auxiliary building crane failure with loaded cask suspended on May 21, 2024
- (4) 122 instrument air compressor failure with 121 and 122 out of service on June 10, 2024
- (5) emergent downpower on Unit 1 to repair circulation water pump leak on June 14, 2024
71111.15 - Operability Determinations and Functionality Assessments
Operability Determination or Functionality Assessment (IP Section 03.01) (6 Samples)
The inspectors evaluated the licensees justifications and actions associated with the following operability determinations and functionality assessments:
- (1) prompt operability determination for MV-32019 on April 9, 2024
- (2) auxiliary building special ventilation system operability and PMT 21 auxiliary building exhaust fan on April 18, 2024
- (3) C18.1 evaluation of temperature for operability of 122 bus room on April 22, 2024
- (4) 21 cooling water strainer failure to backwash for Corrective Action Program (CAP)
===501000084343 on April 22, 2024
- (5) cooling water system operability post Surveillance Procedure (SP) 1159 on April 29, 2024
71111.18 - Plant Modifications
Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02)
=
The inspectors evaluated the following temporary or permanent modifications:
- (1) limit switch modifications for MV-32019 on January 6, 2024
- (2) bus 25 feed to bus 27, setpoint change for Bkr 25-1 for Engineering Change (EC)
===601000004855 on May 7, 2024
- (3) D5 engine 1 fan 1 mods on June 5, 2024
71111.24 - Testing and Maintenance of Equipment Important to Risk
The inspectors evaluated the following testing and maintenance activities to verify system operability and/or functionality:
Post-Maintenance Testing (PMT) (IP Section 03.01)===
- (2) WO 700128733, SP 1089A 11 RHR [residual heat removal] Pump Qtrly Run, on May 9, 2024
- (3) WO 7000095073, MV-32128 Bkr Roll PMT 21 RHR HX [heat exchanger]
CC [component cooling] Inlt MV-32128, on May 14, 2024
- (4) WO 700129256, SP 2102 22 Turbine-Driven AFW Pump Qtrly Test PMT, on May 21, 2024
- (5) WO 700125627, PMT and RTS MD-32428 with New Positioner, on May 22, 2024
- (6) WO 700139187, PMT 22 CC Pump, on May 31, 2024
- (7) 122 auxiliary building special ventilation PMT on May 31, 2024
- (8) WO 700129846, SP 1101 12 MDAFWP Qtr Flow & Vlv Test, on May 29, 2024
- (9) SP 1295 D1 emergency diesel generator pump following maintenance on June 12, 2024
Surveillance Testing (IP Section 03.01) (5 Samples)
- (1) WO 700127266, SP 2101 21 Motor Driven Auxiliary Feedwater Pump Quarterly Flow and Valve Test, on April 1, 2024
- (2) WO 700130624, SP 1106A 12 Diesel CL [cooling water] Pmp Mnthly, on April 15, 2024
- (3) WO 700127468, SP 1090A 11 Containment Spray Pump Quarterly Test, on May 3, 2024
- (4) WO 700126441, SP 2295 D5 Diesel Generator 6 Month Fast Start Test, on May 13, 2024
- (5) WO 700129945, SP 1090B 12 Containment Spray Pump Quarterly Test on May 24, 2024
Diverse and Flexible Coping Strategies (FLEX) Testing (IP Section 03.02) (1 Sample)
- (1) WO 700128442, TP 1870A 121 FLEX DS DRIVEN SG-SFP M-U PMP SEMI-ANN, on May 16, 2024
71114.06 - Drill Evaluation
Required Emergency Preparedness Drill (1 Sample)
- (1) emergency preparedness drill with Drill and Exercise Performance (DEP) and ERO evaluation on May 14,
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 1 auxiliary building ventilation particulate and charcoal filtration 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) (2 Samples)
The inspectors evaluated the following internal dose assessments:
- (1) internal dose assessment for ID# N128502
- (2) internal dose assessment for ID# 301529
Special Dosimetric Situations (IP Section 03.04) (2 Samples)
The inspectors evaluated the following special dosimetric situations:
- (1) skin exposure evaluation for ID# 226834
- (2) declared pregnant worker evaluation for ID#
OTHER ACTIVITIES - BASELINE
===71151 - Performance Indicator Verification
The inspectors verified licensee performance indicators submittals listed below:
MS05: Safety System Functional Failures (SSFFs) Sample (IP Section 02.04)===
- (1) Unit 1 (January 1, 2023, through December 31, 2023)
- (2) Unit 2 (January 1, 2023, through December 31, 2023)
MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)
- (1) Unit 1 (January 1, 2023, through December 31, 2023)
- (2) Unit 2 (January 1, 2023, through December 31, 2023)
BI02: RCS Leak Rate Sample (IP Section 02.11) (2 Samples)
- (1) Unit 1 (January 1, 2023, through December 31, 2023)
- (2) Unit 2 (January 1, 2023, through December 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) follow up of CAP 50100078473 CV-31116 as-found condition on April 22, 2024
- (2) follow up of CAP 50100077533 hourly firewatch round missed on June 26, 2024
71152S - Semiannual Trend Problem Identification and Resolution Semiannual Trend Review (Section 03.02)
- (1) The inspectors reviewed the licensees corrective action program to identify potential trends in backlog reduction meeting effectiveness on April 16, 2024, that might be indicative of a more significant safety issue.
- (2) The inspectors reviewed the licensees corrective action program to identify potential trends in instrument air compressor failures on June 20, 2024, that might be indicative of a more significant safety issue.
71153 - Follow Up of Events and Notices of Enforcement Discretion
Event Report (IP Section 03.02) (2 Partials)
The inspectors evaluated the following licensees event reporting determinations to ensure it complied with reporting requirements.
(1) (Partial)05000306/2024-001-00; LER 2024-001-00 for Prairie Island Nuclear Generating Plant, Unit 2, Reactor Trip and Auto-Start Actuation of Auxiliary Feedwater due to Loss of Suction to the 22 Main Feedwater Pump (2) (Partial)05000306/2024-001-01; LER 2024-001-01 for Prairie Island Nuclear Generating Plant, Unit 2, Reactor Trip and Auto-Start Actuation of Auxiliary Feedwater due to Loss of Suction to the 22 Main Feedwater Pump
INSPECTION RESULTS
Unresolved Item Unresolved Item Associated with Modifications 71111.18 (Closed) to Motor Operated Valve Limit Switch URI 05000306/2024001-01
Description:
A minor violation was identified and documented in Section 71111.18 of this report.
This unresolved Item (URI) is being closed to that minor violation.
Corrective Action References:
501000079553, Bkr 211J-13 Tripped During PMT/RTS 501000079667, Manually Operated MV-32019 per COO-17 501000081027, MOV [motor-operated valve] Limit Switch Grease Related Failures 501000081105, MV-32019 Thermals Tripped D 501000083170, LEGACY: MV-32019 Limit Switch Material 501000083626, MV-32019 Limit Switch
Minor Violation 71111.18 Minor Violation Associated with Modifications to Motor-Operated Valve Limit Switch
Minor Violation: During refueling outage 2R33, modifications were made to the safety-related limit switch installed on motor-operated valve, MV-32019, 21 steam generator main steam supply to the 22 turbine-driven auxiliary feedwater pump. Specifically, the gears inside the replacement switch were stainless steel rather than bronze (not like-for-like), and the licensee drilled an additional hole through the intermittent shaft perpendicular to the manufacturer-provided hole, and then changed the orientation of the rotor from that provided by the vendor, in order for the rotor to work correctly.
Title 10 of the Code of Federal Regulations (CFR) Part 50, Appendix B, Criteria XV, Nonconforming Materials, Parts, or Components, requires, in part, Measures shall be established to control materials, parts, or components which do not conform to requirements in order to prevent their inadvertent use or installation. These measures shall include, as appropriate, procedures for identification, documentation, segregation, disposition, and notification to affected organizations. Nonconforming items shall be reviewed and accepted, rejected, repaired or reworked in accordance with documented procedures.
Contrary to the above, between December 5, 2023, and January 29, 2024, the licensee failed to control nonconforming items, such that they were reviewed and accepted, rejected, repaired or reworked in accordance with documented procedures. Specifically, nonconforming parts were modified and installed without coordination with affected organizations in accordance with plant procedures FP-SC-PE-02, Item Equivalency Evaluations, and FP-E-MOD-02, Engineering Change Control.
Screening: The inspectors determined the performance deficiency was minor. This violation aligns with the minor case of IMC 0612, Appendix E, Examples of Minor Violations, example 4.m: The inspector identified a motor-operated valve (MOV) torque switch was not installed properly. Specifically, the licensees procedure to re-install MOV RH-6833 did not include a step to reset the MOV torque switch to previously installed torque switch settings.
Once identified, the licensee had to enter an unplanned maintenance window to reset the toque switch.
This performance deficiency did not adversely affect the mitigating systems cornerstone objective because the inadequate adherence to procedure would not have resulted in equipment failure. Specifically, the licensee analysis confirmed the change in material was authorized by the vendor and the modification to the shaft and rotor would not prevent the limit switch from performing its safety function, and therefore the limit switch and the motor-operated valve remained operable.
Enforcement:
This failure to comply with 10 CFR 50, Appendix B, Criteria XV constitutes a minor violation that is not subject to enforcement action in accordance with the NRCs Enforcement Policy.
Observation: Follow-up of CAP 501000077533 Hourly Firewatch Round 71152A Missed on F5 APP Inspectors selected CAP 501000077533 for follow-up based upon the risk significance of fire as an external event, especially during higher risk evolutions (HRE). On October 8, 2023, at 1535, Operations entered a fire impairment for Unit 2 establishing hourly fire watches for areas listed in F5 Appendix K, Attachment 4, per procedure 2C1.3-M5. The 1800 round was not completed for the safety-related bus 15 room. The individual performing the fire watch round for 1900 realized that the incorrect room had been checked on the 1800 round and reported the condition to supervision. The licensee entered the issue into the corrective action program (CAP) and performed a human performance event investigation. Corrective actions included review of other rounds which determined no other spaces were missed, re-training staff to arrest knowledge gaps, and the bus 15 room was verified to have functional fire detection. Inspectors reviewed the corrective action database and noted that corrective actions appeared to be effective since no further issues have been identified.
No more-than-minor findings or violations were identified during this inspection.
Observation: Review of Actions Taken for CAP 501000078473 CV-31116 71152A As-Found Condition Inspectors reviewed actions taken for CAP 501000078473, CV-31116 As-Found Condition, based upon risk significance. This CAP documented the following: foreign material (FM) on top of the actuating cylinder pistons, binding of the actuator disk, and scoring at the bottom of the air cylinders (full closed position). The FM was determined to be pipe scale from the upstream air system. The CAP was then closed to WO 700038835-0010 which completed PM 3170-1-21, CV-31116 Loop A MSIV Refueling Inspection. Inspectors reviewed the WO and determined that actions were taken to correct or disposition the conditions identified in CAP 501000078473 and the WO documented that the valve moved freely following maintenance. In addition, the PMT was completed satisfactorily, ensuring the valve was capable of performing its designed safety function. Inspectors did not identify any issues of concern associated with the actions taken to correct the condition(s) adverse to quality identified in the CAP. The inspectors did not identify any more-than-minor findings or violations during this review.
Observation: Trend Review of Aggregate Risk Impact of Low Safety 71152S Significant Systems Based upon a cognitive trend, inspectors performed a trend review of how the licensee was assessing the aggregate risk associated with deficiencies in low safety significant systems.
The inspectors identified that the licensee had not recently performed backlog reduction meetings in accordance with fleet procedure FP-WM-WOI-01, Work Identification, Screening, Validation, and Cancelation, Attachment 7. The purpose of these meetings was to determine the aggregate risk impact of multiple deficiencies in a particular system and elevating the priority of the repairs as needed based upon the results of that review.
Inspectors determined that the failure to conduct the meetings was due to individuals new in role who were unfamiliar with the procedural requirements. Once identified, the licensee entered this issue into their corrective action program (CAP) and initiated monthly meetings as required. Inspectors determined that the action taken has corrected the condition adverse to quality. No more-than-minor findings or violations were identified during this review.
Observation: Trend of Instrument Air Compressor Failures 71152S Inspectors selected a cognitive trend of instrument air compressor (IAC) failures for a semi-annual review. Twenty corrective action documents were reviewed, where nine maintenance rule evaluations identified condition monitoring events across multiple functions. On May 1, 2024, the licensee determined that the condition monitoring threshold for 123 instrument air compressor had been exceeded, and 123 instrument air compressor was later (on June 27, 2024) placed in (a)(1) monitoring status per 10 CFR 50.65 Maintenance Rule. On June 8, 2024, QIM 501000086471 titled, Instrument Air System Health, was written to identify the condition of all three IACs degraded or non-functional. Immediate corrective actions included the senior leadership team meeting, staffing the outage control center, and prioritizing IAC troubleshooting and corrective maintenance. This led to restoration of the three instrument air compressors and associated support equipment. Planned corrective actions include re-evaluating upcoming preventive maintenance work windows in an attempt to avoid the need for future corrective maintenance. Inspectors noted that the condition adverse to quality had been corrected with the restoration of all three instrument air compressors. Additional actions are planned to evaluate for trends or commonalities associated with instrument air equipment failures to provide increased reliability moving forward. No more-than-minor findings or violations were identified during the semi-annual trend review.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
- On July 15, 2024, the inspectors presented the integrated inspection results to Thomas Conboy, Site Vice President, and other members of the licensee staff.
- On May 3, 2024, the inspectors presented the radiation protection baseline inspection results to Timothy Borgen, Plant Manager, and other members of the licensee staff.
DOCUMENTS REVIEWED
Inspection Type Designation Description or Title Revision or
Procedure Date
71111.01 Procedures AB-2 Severe Weather 52
71111.04 Drawings NF-39223 Flow Diagram Feedwater & Aux Feedwater Unit 2 93
XH-1-29 Flow Diagram Spent Fuel Cooling System Units 1 & 2 80
Procedures 1C20.7 D1/D2 Diesel Generators 59
C16 Spent Fuel Cooling System 72
C28-18 22 Turbine Driven Auxiliary Feedwater Pump 14
C28-7 Auxiliary Feedwater System Unit 2 62
Operating D5/D6 Diesel Generators 26
Procedure 2C20.7
71111.05 Fire Plans Fire Detection 695' Level Turbine Building, Battery Room 11 & 12 46
Zone 1
Fire Detection Aux Feedwater Pump Rooms, El 695' 49
Zone 2
Fire Detection Battery Room 21 & 22, El 695' 46
Zone 35
Fire Detection Fire Area 69; Turbine Building Unit 1, Elevation 679' and 695'47
Zone 4
Fire Detection Fire Area 26; Level D2 Diesel Room, Elevation 695' 49
Zone 6
Fire Detection Fire Area 41B; Screenhouse Ground Floor, Elevation 670' 47
Zone 74
Fire Detection Fire Areas 41 & 41A; Plant Screen House, Elevation 695' 49
Zone 75
Fire Detection D1 Diesel Room, El 695' 49
Zone 82
71111.06 Procedures AB-4 Flood 60
71111.12 Corrective Action 5010000860002 SP 1234B Procedure Issues 05/29/2024
Documents
Engineering IEE-2024-054-00 Limitorque 4-Train Limit Switch Assembly, P/N 10120 to P/N 0
Changes 10160, MID # KLT13G-1, SR
Engineering 608000001135 Come-along Usage on MSIV
Evaluations QF0739, Request Approval 602000017241, Chain-Falls for Closing the MSIVs 04/01/2024
Inspection Type Designation Description or Title Revision or
Procedure Date
Number 355 as Part of Operating the Plant
Miscellaneous Prairie Island Various Functions Various
Maintenance Rule Dates
Basis Document
QF0739, Request Should the Testing Of CV-31741 be Adjusted to Account for 05/02/2024
Number 362 the Max Containment Pressure Of 46 Psig?
QF0739, Request What is the Credited Fail Position for SV-33133, Cooling 05/02/2024
Number 363 Water to 121 Safeguards Traveling Screens Solenoid Valve?
Procedures PM 3122-3 Shield Bldg, Category 1 Vent Zone, Fire and Security Door 43
Inspection
SP 1234B 12 Aux Feedwater Pump Suction and Discharge Pressure 12
Switches Calibration
71111.15 Corrective Action 501000083626 MV-32019 - 21 SG Steam Supply Valve 0
Documents
Engineering POR Satisfactorily Completed SP 1159, COOLING WATER 01/04/2024
Evaluations 501000085115 VALVES QUARTERLY TEST per WO-000700122604-0010.
Procedures SP 1159 Cooling Water Valves Quarterly Test 19
71111.18 Corrective Action 501000080988 PICETI Bus 27 Coordination Not Assured 01/18/2024
Documents 501000084375 Breaker Opening Times: ENG-EE-162 04/22/2024
501000084967 PMT Issues for Setpoint Change Bus 27 Relay 05/07/2024
501000085005 Perform BKR Setpoint Chg: As Found 05/07/2024
Drawings NE-116785, Prairie Island Nuclear Generating Plant 80
Sheet 12
NF-120705-0 Internal Wiring Diagram 4kV Switchgear Bus 25 77
Cub. 1 - Sh. 2
NF-239270 Prairie Island Plant and Substation Operating One Line 10
Diagram
Engineering 601000004855 0
Changes
Miscellaneous 601000005066 D5 ENG1 MTR Cooling Fan New Keyway EC 0
EPRI Report Technical Repair Guidelines for Limitorque Model SMB-OO June 1995
Summary Valve Actuators
Work Orders WO 700134076 Perform BKR 25-1 Setpoint Change 05/07/2024
71111.24 Procedures SP 1074A Train A Auxiliary Building Special Vent System 21
Inspection Type Designation Description or Title Revision or
Procedure Date
Quarterly Test
SP 1074B Train B Auxiliary Building Special Vent System 19
Quarterly Test
SP 1089A Train A RHR Pump and Suction Valve from RWST 36
Quarterly Test
SP 1090A 11 Containment Spray Pump Quarterly Test 38
SP 1090B 12 Containment Spray Pump Quarterly Test 37
SP 1101 12 Motor-Driven Auxiliary Feedwater Pump Quarterly 74
Flow and Valve Test
SP 1106A 12 Diesel Cooling Water Pump Monthly Test 106
SP 1295 D1 Diesel Generator 6 Month Fast Start Test 77
SP 2101 21 Motor-Driven Auxiliary Feedwater Pump Quarterly 59
Flow and Valve Test
TP 2296B D6 Radiator Fans Weekly Run Test & 2ZG System Weekly 14
Damper Cycling
Work Orders WO 700127468 SP 1090A 11 CNTMT SPRAY PMPQTR 05/03/2023
WO 700078684 Troubleshoot BKR 211J-13 and MV-32019
WO 700095073 (BKR 211J-11) 21 RHR HX CC INLT MV-32128 04/28/2022
WO 700119556 QIM 501000070722
WO 700125627 22 D6 RM RECIRC AIR MD REPL POSNR 05/22/2024
WO 700128733 SP 1089A-1A RHR PMP & SUCT VLV FROM RWST 05/29/2024
WO 700129456 SP 1090B 12 CNTMT SPRAY PMP QTR 06/13/2024
WO 700129846 SP 1101 12 MDAFWP WTR FLOW & VLV TEST 05/30/2024
WO 700130624 SP 1106A 12 DIESEL CL PMP MNTHLY
WO 700137489 SP 1074A TRN A ABSV SYS QTR TEST
71124.03 Calibration Annual SCBA MSA SCBA Annual Flow Test 07/13/2023
Records Flow Test for
LAD090894
Annual SCBA Scott SCBA Annual Flow Testing 07/12/2023
Flow Test for Unit
PI-FB-112
Corrective Action 501000065032 SCBA Breathing Air Supply 07/27/2022
Documents 501000080448 CR Breathing Air System is Degrading 01/03/2024
Inspection Type Designation Description or Title Revision or
Procedure Date
Corrective Action 501000084450 Fit Test Monitored Evolution Comment 04/23/2024
Documents 501000084455 NRC Health Physics Observations 04/24/2024
Resulting from
Inspection
Miscellaneous Grade D Testing Grade D Testing for Plant Air and SCBA Compressors 12/27/2023
PINGP 252 Respirator Inspections for the Month of December 2023 17
(RPIP 1214)
Procedures FP-RP-RPP-02 Respirator Fit Testing and Portacount Fit Tester Operation01
RPIP 1211 Charging MSA or Scott SCBA Air Cylinders 03
RPIP 1214 Respiratory Protection Equipment Testing 30
RPIP 1216 MAX Air 2000-800 Respiratory Protection 00
Self-Assessments Snapshot Self-Program Self-Assessment for Inspection Procedure 00
Assessment for 71124.03
71124.03
Work Orders 700102048 Control Room Clean-up Ventilation Efficiency Test 03/09/2023
71124.04 Calculations SSA Prairie Island 2023 Isotopic Mix Report 00
606000001914
Corrective Action 501000074108 DLR Vendor Failed to Detect SDE 06/01/2023
Documents 501000082610 Dose Discrepancies for Period 2, 2023 03/06/2024
Engineering Technical Basis SRD Bias 00
Evaluations Document#
20-001
Miscellaneous APEX / In-Vivo Whole Body Counter Log for January 2024 and 03/07/2024
Logbook February 2024
Summary
APEX / In-Vivo Whole Body Counter Log for May 2023 to December 2023 01/02/2024
Logbook
Summary
Declared PINGP 656 Prairie Island Fetal Protection Program 10/18/2022
Pregnant Worker Evaluation
Evaluation for ID#
231460
Dosimetry Primary to Secondary Dose Discrepancy Review for 2023 04/22/2024
Discrepancy
Inspection Type Designation Description or Title Revision or
Procedure Date
Review for 2023
Exposure Primary to Secondary Dosimetry Investigation Per QF3008 03/06/2024
Correction
Radiation
Occurrence
Report for ID#
313426
Exposure Primary to Secondary Dosimetry Investigation Per QF3008 03/05/2024
Correction
Radiation
Occurrence
Report for ID#
N151793
NLVAP NVLAP Accreditation for 10/03/2023-06/30/2024 10/03/2023
Accreditation for
Mirion
Technologies
Personnel PCE Evaluation Form QF1282 11/27/2023
Contamination
Event Review for
ID# 226834
Procedures FP-RP-DR-01 Sentinel DLR Issue & Managing Dose Records 08
FP-RP-IDA-01 Internal Dose Assessment 04
FP-RP-WBC-01 Whole Body Counter Use and Functional Check 09
Radiation 2023 Annual Area Area Dosimetry Results and Trending 01/30/2024
Surveys TLD Trending
Radioactive Internal Dose Evaluation Per QF1282 10/16/2023
Intake Screening
for ID# 301529
Radioactive Internal Dose Evaluation Per QF1282 10/16/2023
Intake Screening
for ID# N128502
Technical Basis Prospective Dose Evaluation and Dose Reporting Threshold 02
Document No. 17-Summary
Inspection Type Designation Description or Title Revision or
Procedure Date
001
Self-Assessments Snapshot Self-Program Self-Assessment for Inspection Procedure 00
Assessment 71124.04
71124.04
71151 Miscellaneous PI Summary Prairie Island Unit 1, Initiating Events, IE01 - Unplanned 06/2023 -
Report Scams per 7,000 Critical Hours 05/2024
PI Summary Prairie Island Unit 2, Initiating Events, 1E01 - Unplanned 06/2023 -
Report Scrams per 7,000 Critical Hours 05/2024
71152A Corrective Action 501000077533 Hourly Firewatch Round Missed on F5 APP 10/09/2023
Documents
Work Orders WO 700038835 INSP CV-31116 Valve Internals 10/30/2023
71152S Corrective Action 501000078473 CV-31116 As-Found Condition 11/01/2023
Documents 501000079065 2R33 ISI Indication CV-31116 11/16/2023
501000084473 Roll Up CAP for IA/SA Sys Issues 04/24/2024
501000086471 Instrument Air System Health 06/08/2024
71153 Corrective Action 501000082488 Unit 1 Reactor Trip 1
Documents
Miscellaneous 585121 Automatic Reactor Trip Due to a Loss of Suction in Main 03/03/2024
Feedwater Pump
QF0739, Request What Is the Difference in CCDP Between a Normal Reactor 06/06/2024
Number 1 Trip from 100% Power and a Normal Reactor Trip from
100% Power with Main Feedwater Pumps Failed (Unit 1)?
18