IR 05000282/2019003

Integrated Inspection Report 05000282/2019003 and 05000306/2019003

ML19318F616
Person / Time
Site:	Prairie Island
Issue date:	11/14/2019
From:	Hironori Peterson NRC/RGN-III
To:	Sharp S Nuclear Management Co
References
IR 2019003
Download: ML19318F616 (20)

Text

ber 14, 2019

SUBJECT:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT - INTEGRATED INSPECTION REPORT 05000282/2019003 AND 05000306/2019003

Dear Mr. Sharp:

On September 30, 2019, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Prairie Island Nuclear Generating Plant. On October 24, 2019, 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.

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 Prairie Island Nuclear Generating Plant. 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 10 CFR 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: 05000282/2019003 and 05000306/2019003 Enterprise Identifier: I-2019-003-0057 Licensee: Northern States Power Company, Minnesota Facility: Prairie Island Nuclear Generating Plant Location: Welch, MN Inspection Dates: July 01, 2019 to September 30, 2019 Inspectors: R. Baker, Senior Operations Engineer J. Demarshall, Senior Operations Engineer L. Haeg, Senior Resident Inspector K. Pusateri, Resident Inspector 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 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 Failure to Repair Leaks or Justify and Approve Priority Deviations per the Leak Management Process Cornerstone Significance Cross-Cutting Report Aspect Section Mitigating Green [H.4] - 71111.12 Systems FIN 05000282,05000306/2019003-01 Teamwork Open/Closed The inspectors identified a finding of very low safety significance (Green) on August 21, 2019, for the licensee's failure to repair, or review, approve and justify priority deviations for approximately fifteen Priority 3 leaks per FP-WM-LMP-01, "Leak Management Process",

Revisions 0 and 1.

Additional Tracking Items None.

PLANT STATUS

Both units operated at full power for the entirety of the inspection period with the exception of brief power reductions for planned testing or flexible power operations.

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 plant status activities described in IMC 2515 Appendix D, Plant Status and conducted routine reviews using IP 71152, Problem Identification and Resolution. 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.

71111.01 - Adverse Weather Protection Summer Readiness Sample (IP Section 03.01)

(1) The inspectors evaluated summer readiness of offsite and alternate AC power systems on 08/01/2019

71111.04Q - Equipment Alignment Partial Walkdown Sample (IP Section 03.01)

(1) 'A' train cooling water header with 'B' cooling water header out-of-service for pressure switch calibration on 07/30/2019

(2) 'B' train cooling water header on 09/10/2019

(3) 21 component cooling water subsystem during 22 component cooling water subsystem quarterly surveillance testing on 09/24/2019

(4) Unit 1 safety injection system on 08/13/2019

71111.05Q - Fire Protection Quarterly Inspection (IP Section 03.01)

(1) Fire zone 26; D2 emergency diesel generator room on 07/14/2019

(2) Fire zone 83; bus 150 room on 07/29/2019

(3) Fire zone 37; normal switch gear room bus 150 and 160 on 07/29/2019

(4) Fire zone 30; auxiliary building elevation 755' on 09/18/2019

71111.06 - Flood Protection Measures Inspection Activities - Internal Flooding (IP Section 02.02a.)

(1) Flood barriers within the Unit 2 containment spray pump room on 08/12/2019

71111.11A - Licensed Operator Requalification Program and Licensed Operator Performance Requalification Examination Results (IP Section 03.03)

(1) The inspectors reviewed and evaluated the licensed operator examination failure rates for the requalification annual operating exam administered from August 6, 2019 through September 27, 2019.

71111.11B - Licensed Operator Requalification Program and Licensed Operator Performance Licensed Operator Requalification Program (IP Section 03.04)

(1) Biennial Requalification Written Examinations The inspectors evaluated the quality of the licensed operator biennial requalification written examination administered on September 12, 2019.

Annual Requalification Operating Tests The inspectors evaluated the adequacy of the facility licensees annual requalification operating test.

Administration of an Annual Requalification Operating Test The inspectors evaluated the effectiveness of the facility licensee in administering requalification operating tests required by 10 CFR 55.59(a)(2) and that the facility licensee is effectively evaluating their licensed operators for mastery of training objectives.

Requalification Examination Security The inspectors evaluated the ability of the facility licensee to safeguard examination material, such that the examination is not compromised.

Remedial Training and Re-examinations The inspectors evaluated the effectiveness of remedial training conducted by the licensee, and reviewed the adequacy of re-examinations for licensed operators who did not pass a required requalification examination.

Operator License Conditions The inspectors evaluated the licensees program for ensuring that licensed operators meet the conditions of their licenses.

Control Room Simulator The inspectors evaluated the adequacy of the facility licensees control room simulator in modeling the actual plant, and for meeting the requirements contained in 10 CFR 55.46.

Problem Identification and Resolution The inspectors evaluated the licensees ability to identify and resolve problems associated with licensed operator performance.

71111.11Q - Licensed Operator Requalification Program and Licensed Operator Performance Licensed Operator Performance in the Actual Plant/Main Control Room (IP Section 03.01)

(1) The inspectors observed and evaluated licensed operator performance in the control room during response to F12 control rod position indicator issues on 08/26/2019 Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)

(1) The inspectors observed and evaluated licensed operator requalification training in the simulator on 07/30/2019

71111.12 - Maintenance Effectiveness Routine Maintenance Effectiveness Inspection (IP Section 02.01)

(1) Leak management program repair deferrals on 08/14/2019

(2) Maintenance rule condition monitoring event reviews on 09/18/2019

71111.13 - Maintenance Risk Assessments and Emergent Work Control Risk Assessment and Management Sample (IP Section 03.01)

The inspectors evaluated the risk assessments for the following planned and emergent work activities:

(1) 121 safeguards battery room cooler issues during the week of 07/21/2019

(2) Battery room steam exclusion damper issues on 07/24/2019

(3) Maintenance risk while troubleshooting Unit 2 letdown orifice isolation valve and RCS sample primary containment isolation valve on 08/07/2019

71111.15 - Operability Determinations and Functionality Assessments Operability Determination or Functionality Assessment (IP Section 02.02)

(1) D2 diesel generator air start compressor issues on 07/31/2019 (AR 501000030179)

(2) 22 inverter operability following static switching to unregulated AC power source on 07/24/2019

(3) Unit 2 residual heat removal operability due to non-conforming flood barrier (AR 501000030644)

(4) Erratic behavior of control rod F12 on 08/25/2019 (AR 501000031191)

71111.18 - Plant Modifications Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02)

(1) Residual heat removal modification in Unit 2 containment spray room on 08/01/2019

71111.19 - Post-Maintenance Testing Post-Maintenance Test Sample (IP Section 03.01)

(1) Testing following repairs to D1 diesel generator air start system degraded condition on 07/15/2019

(2) Testing following repairs to battery room steam exclusion damper on 07/26/2019

(3) Testing following 11 containment power operated vacuum breaker valve on 08/08/2019

(4) Testing following troubleshooting of F12 control rod position indication issues on 08/26/19

(5) Testing following repairs to CV-39154, 122 spent fuel pool heat exchanger component cooling water supply valve on 09/19/2019

(6) Testing following troubleshooting of CV-31348, letdown orifice isolation valve B on 09/19/2019

71111.22 - Surveillance Testing Surveillance Tests (other) (IP Section 03.01)

(1) SP 2251; Caustic Addition Valve Quarterly Test on 07/12/2018

(2) SP 2155A; CC System Quarterly Test Train A on 08/19/2019

Inservice Testing (IP Section 03.01) (1 Sample)

(1) SP 1101; Motor Driven Auxiliary Feed Water Pump on 08/24/2019

FLEX Testing (IP Section 03.02) (1 Sample)

(1) TP 1869A; 121 FLEX 300 kW Diesel Generator Test and Inspection Quarterly (034- 071) on 08/19/2019

OTHER ACTIVITIES - BASELINE

===71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:

BI02: RCS Leak Rate Sample (IP Section 02.11) ===

(1) Unit 1 reactor coolant system leakage July 1, 2018 through June 30, 2019 on 08/29/2019

(2) Unit 2 reactor coolant system leakage July 1, 2018 through June 30, 2019 on 08/29/2019 71153 - Follow-up of Events and Notices of Enforcement Discretion Reporting (IP Section 03.05) (1 Partial)

(1) (Partial)

Past-operability review of MV-32410 containment isolation valve (AR 501000030520)on 08/19/2019

INSPECTION RESULTS

Failure to Repair Leaks or Justify and Approve Priority Deviations per the Leak Management Process Cornerstone Significance Cross-Cutting Report Aspect Section Mitigating Green [H.4] - 71111.12 Systems FIN 05000282,05000306/2019003-01 Teamwork Open/Closed The inspectors identified a finding of very low safety significance (Green) on August 21, 2019, for the licensee's failure to repair, or review, approve and justify priority deviations for approximately fifteen Priority 3 leaks per FP-WM-LMP-01, "Leak Management Process",

Revisions 0 and 1.

Description:

On or around June 19, 2019, the inspectors questioned how a through-wall cooling water pipe leak discovered on May 4, 2019 was being addressed via the requirements of the licensee's FP-WM-LMP-01, "Leak Management Process" (LMP). Although this leak was assessed as not impacting the safety function of the cooling water system, the inspectors recalled additional requirements contained within the self-imposed LMP that was established to prioritize, correct, and trend leaks of various severity on certain safety and non-safety systems. Based on the inspector's questioning, the licensee determined that the leak was originally determined to be "Priority 4" (repair per normal work processes) per the LMP, but in fact should have been classified as a Priority 2 (repair within 5 weeks of identification).

Alternatively, the LMP also permitted deviation from the priority repair schedule if the leak was reviewed, approved, and justification documented by the Operations Manager. Because this leak had not been repaired within 5 weeks, nor had a priority deviation been performed, the licensee generated AR 501000028726 to re-screen the prioritization within the work management process.

After reviewing AR 501000028726, the inspectors noted that an extent of condition review had not been requested to determine whether any other leaks were past due based on their assigned priority. On June 25, 2019, the inspectors questioned whether any other leak repairs were past due and the licensee generated AR 501000028953 noting approximately fifteen existing Priority 3 leaks (repair within 28 weeks of identification) that were also past due per the LMP for which priority/schedule deviations were not approved. This AR included a recommendation to ensure that the deviations were performed in accordance with the Section 5.6, "Deviation from Specific Prioritization and Schedule" of the LMP.

After additional discussion with the licensee, AR 501000029069 was generated on June 28, 2019, to perform priority deviation reviews for the Priority 3 leaks. This AR stated that immediate actions taken were: "Per Attachment 5, Deviation Request, in FP-WM-LMP-01, the Assistant Operations Manager was notified and gained his approval." However, when the inspectors reviewed AR 501000029069 on August 21, 2019, they noted that the AR was "closed to actions taken", and no actions were in fact taken to review, approve, and document the justification of deviations for the Priority 3 leaks. The inspectors raised this issue to the licensee and AR 501000031008, "Missing Recommended Actions in LMP" was generated.

Corrective Actions: The licensee generated actions to re-screen and document deviations for Priority 3 leaks, performed an organizational effectiveness investigation, and assigned clear single-point ownership of the process to ensure overall process compliance going forward.

Corrective Action References: AR 501000031008; Missing Recommended Actions in LMP; August 21, 2019

Performance Assessment:

Performance Deficiency: The inspectors determined that failing to meet the self-imposed standards of FP-WM-LMP-01, "Leak Management Process," Revision 0 and 1, to review and approve deviations from the specified prioritization for approximately fifteen Priority 3 leaks, was a performance deficiency. The cause of the issue of concern was reasonably within the licensee's ability to foresee and correct and the issue of concern should have been prevented. Specifically, following inspector questioning of adherence to the LMP, the licensee generated a condition report recognizing approximately fifteen Priority 3 leaks were not repaired within 28 weeks of identification, and did not have priority/schedule deviations reviewed, approved, nor justification documented. Following issuance of Revision 1 to the LMP on July 30, 2019, the inspectors identified on August 21, 2019, that deviations were not reviewed and approved for the fifteen Priority 3 leaks.

Screening: The inspectors determined the performance deficiency was more than minor because if left uncorrected, it would have the potential to lead to a more significant safety concern. Specifically, if the failure to review, approve, and document the justification of repair deviations within FP-WM-LMP-01 was left uncorrected, the leak(s) had the potential to further degrade to point of challenging equipment safety functions.

Significance: The inspectors assessed the significance of the finding using Appendix A, The Significance Determination Process (SDP) for Findings At-Power. Although more than one cornerstone was affected for this finding, the inspector identified that the majority of the past-due Priority 3 leaks affected the Mitigating Systems cornerstone. The finding was determined to be of very low safety significance (Green), because the inspectors answered "No" to Questions A.1-4 under Exhibit 2 - Mitigating Systems Screening Questions.

Cross-Cutting Aspect: H.4 - Teamwork: Individuals and work groups communicate and coordinate their activities within and across organizational boundaries to ensure nuclear safety is maintained. Specifically, prior to, and after revision to FP-WM-LMP-01, the roles and responsibilities for implementing organizations were not coordinated to ensure compliance with the LMP.

Enforcement:

Inspectors did not identify a violation of regulatory requirements associated with this finding.

Observation: Past-Operability Review of MV-32410 Containment Isolation Valve 71153 On August 19, 2019, the inspectors reviewed the licensee's past-operability evaluation for MV-32410, RCS sample containment isolation valve, following indications of valve stem diaphragm leakage. Based on the licensee's evaluation, the inspectors determined that the correct scope and considerations were given to inform a 10 CFR 50.73 reportability review.

Because the final determination of reportability was not made at the end of the inspection period, the inspectors considered this a partial inspection sample and plan to complete the sample in the next inspection period. No concerns were identified with respect to the past-operability evaluation.

EXIT MEETINGS AND DEBRIEFS

The inspectors verified no proprietary information was retained or documented in this report.

• On October 24, 2019, the inspectors presented the integrated inspection results to Mr. S. Sharp, Site Vice President, and other members of the licensee staff.

• On September 13, 2019, the inspectors presented the licensed operator requalification program inspection results inspection results to Mr. H. Hansen, Plant Manager and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.04Q Corrective Action AR NRC Question: Pressurized Abandoned Pipe 08/12/2019

Documents 501000030635

Resulting from

Inspection

Procedures C1.1.14-2 Component Cooling System 38

C1.1.35-1 Cooling Water System Unit 1 12

C1.1.35-2 Cooling Water System Unit 2 11

71111.05Q Engineering QF-0540 (FP-E- Temporary Supplemental Cooling for the 11, 12, 21, and 22 6

Changes MOD-01) Battery Rooms (EC 19801)

Fire Plans F5 Appendix A Fire Detection Zone 30; Auxiliary Building El. 755' 41

Fire Detection Normal Swgr Room Bus 150 and 160 Unit 1 Turbine 31

Zone 83; Fire Building-Class 1; Corridor Floor Elevation 695'

Area 37, F5

Appendix A

Miscellaneous FPEE-11-049; Fire Doors 1

NFPA80-1968

Code Compliance

Report

71111.06 Calculations16-184 Calculation Signature Sheet - PINGP HELB Auxiliary 07/12/2019

Building Flooding Analysis

Corrective Action AR NRC Question: Flood Barriers 08/12/2019

Documents 501000030644

71111.11B Corrective Action 501000004815 Containment Opening During Maintenance 12/18/2017

Documents 501000012585 D2 EDG [Emergency Diesel Generator] Jacket Water Leak 05/28/2018

501000022808 Simulator DEP [Drill/Exercise Performance] Failure 02/12/2019

501000023729 Elevation of DEP Performance 03/02/2019

Corrective Action 501000031709 Loss of Data Due to Corrupt File 09/12/2019

Documents 501000031781 Ops Watch Proficiency Verification Delta 09/12/2019

Resulting from

Inspection

Miscellaneous PINGP 1568 Licensed Operator Return to Duty Checklist - LSCJ03 dated 5

06/27/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

PINGP 1568 Licensed Operator Return to Duty Checklist - LPCD01 dated 5

05/17/2019

PINGP 910 NRC Licensed Duty Quarterly Report Tracking Report-All 12

RO and SRO Licensees Active for 2nd Quarter 2019

QF [Quality Form] PRC [Performance Review Committee] Meeting Record- 01/19/2018

1060-03 Failure of Cycle 18A Dynamic Simulator Evaluation # 1

QF 104004 Remediation Training Form - Approval No. 602000002984 12

for ADMIN-108 Failure

QF1060-03 PRC [Performance Review Committee] Meeting Record- 01/29/2018

Failure of Cycle 18A Dynamic Simulator Evaluation # 2

QF1060-03 PRC [Performance Review Committee] Meeting Record- 12/12/2018

Failure of Cycle 18F Dynamic Simulator Evaluation # 2

QF107302 Crew Simulator Examination Summary (Week 4/Crew 6- 09/10/2019

Group 1 and 2)

QF107303 Individual Operator Simulator Examination Summary (Week 09/10/2019

4/Crew 6-11 Individuals)

QF107304 SE/STA Simulator Examination Summary (Week 4/Crew 6-1 09/10/2019

Individual)

QF1075-02 Time Critical Operator Action Validation Summary Sheet-PI- 07/16/2018

OPS-TCOA-21C, Isolate Line Breaks to Preclude Internal

Flooding: Main Feed Line

QF1075-02 Time Critical Operator Action Validation Summary Sheet-PI- 07/16/2018

OPS-TCOA-01A, Transfer to Recirculation with Both Trains

Available

SWO [Simulator Heater Drain Tank (HDT) Level Fail Low Should Cause 07/30/2019

Work Order] B9D- Alarm 47003-0202

039

SWO B7D-086 Simulator Failed - Lost Training Time 12/06/2017

SWO B8D-073 Panels B, C, & D I/O Failure 12/282018

SWO B9D-054 R-12 Operation in the Simulator Does Not Require Turning 09/12/2019

the Key for the Mode Selection, but in the Plant , the Key

May be Required; Validate the Simulator Configuration

Matches the Plant for the Key Function.

SWO B9D-055 Alarms Related to R-10 Came in When R-12 Sample Pump 09/12/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

Was Stopped; Validate R-10 Alarm Logic

Procedures 1C1.2-M1 Unit Startup to Mode 1 8

1C1.2-M2 Unit 1 Startup To Mode 2 6

1C1.4 Unit 1 Power Operation 65

C1B Appendix - Reactor Startup 23

C47003 Alarm Response Procedure, Annunciator Location 47003- 17

202, 11 Heater Drain Pump Trouble

D30 Post Refueling Startup Testing 65

D32 Temperature Coefficient Measurement At Hot Zero Power 13

D51 Temperature Coefficient Measurement At Power 14

FP-T-SAT-73 Licensed Operator Requalification Program Examinations 14

FP-T-SAT-80 Simulator Configuration Management 10

FP-T-SAT-81 Simulator Testing and Documentation 10

QF1081-01 Simulator Performance Test Procedure 2

SP [Surveillance NIS Power Range Daily Calibration 50

Procedure] 1005

SWI [Section Operator Qualification Program 15

Work Instruction]

O-43

SWI O-35 Emergency Operating Procedure Verification, Validation, 26

and Maintenance

TP [Test Quarterly Watchstander Verification 3

Procedure] 1850

Self-Assessments AR Pre-IP 71111.11B Licensed Operator Requalification 05/08/2019

600000500987 Program Inspection Assessment

71111.11Q Corrective Action AR Erratic Behavior on Control Rod F12 (Cont. Rod Bank A 08/25/2019

Documents 501000031191 Group 2 POS F12)

Miscellaneous SEG# P9118ST- Cycle 18J Simulator Session #2 1

1002

Procedures SP 1319 Rod Position Verification 25

TP 1018C Rod Position Indication Adjustments 10

[2018C]

71111.12 Corrective Action AR FP-WM-LMP-01 Schedule Deviation 06/25/2019

Documents 501000028953

Inspection Type Designation Description or Title Revision or

Procedure Date

Resulting from AR Request Deviation for Leak Priority 06/28/2019

Inspection 501000029069

AR Request Deviation for Leak Priority 06/28/2019

501000029102

AR Missing Recommended Actions in LMP 08/21/2019

501000031008

AR FP-WM-LMP-01 Section 5.5 Trending 09/25/2019

501000032308

Procedures FP-WM-LMP-01 Leak Management Process 0 and 1

71111.13 Corrective Action AR SP 1112 Gap Between Blades of CD-34196 07/24/2019

Documents 501000029947

AR 121 Battery Room Chiller Not Running 07/23/2019

501000029977

AR 121 Battery Room Chiller Not Running 07/24/2019

501000030021

AR 121 Battery Room Chiller Failed to Start 07/26/2019

501000030036

AR Fire Door Held Open by Air Pressure 07/25/2019

501000030049

AR Battery Room Temperature Margin 07/27/2019

501000030057

AR Resetting Low Oil Pressure Trip 07/27/2019

501000030058

AR SPV Battery Room Cooling 07/28/2019

501000030106

AR No Design Margin for Battery Room RH Post-HELB 07/29/2019

501000030151

AR 2R10 and 2R11 High ROC ERCS Alarms 08/05/2019

501000030216

AR 2TM-126-Out of Tolerance 08/07/2019

501000030455

AR 2TM-127 REGEN HT WXGR R/I Found Out of Tolerance 08/07/2019

501000030464

AR Potential Diaphragm Degraded: MV-32410 08/07/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

501000030520

AR Passive MOV Usage Procedural Steps 08/21/2019

501000031050

Drawings B12A-2 Charging, 16

Letdown and Seal

Water Simplified

Flow

CV-31348 Letdown Orifice Isolation Valve B 08/07/2019

Electrical for

Orifice Isolation

Valve

NE-40409 Sheet Letdown Orifice Isolation - Valve A - CV-31347 (W2-8140A) H

107 Letdown Orifice Isolation - Valve B - CV-31348 (W2-8140B)

NF-40643-4 Penetration Cabinets 2134 and 2135 Wiring Diagram (EC 76

2936)

NF-40784-12 Interlock Logic Diagram Chemical Volume and Control 12

System Unit 2 - Letdown Orifice Isolation Valve B

NL-40529-71F; Northern States Power Co.-OT2 Switch Module External 11/20/1972

Project No. 21- Wiring Diagram Control Panel B-2

6197

X-HIAW-1001- Main Control Board B/M and Switch Development Module 01/21/1999

711-16 Series M02

X-HIAW1001- Prairie Island Units 1 and 2, Main Control Board MO2 10/14/1970

711-22 Schematic

XH-1001-4 Flow Diagram Chemical and Volume Control Unit 2 08/18/2018

XH-1001-5 Flow Diagram Chemical and Volume Control Unit 2 08-16-2018

Procedures 2C12.1 Letdown, Charging, and Seal Water Injection - Unit 2 34

H8-E.1.36D.DG EGS Grayboot Connectors Data Sheet 4

Work Orders Bypass WO Applicable Tech Specs 3.3.3 and 3.6.3 - Letdown Orifice 08/05/2019

700060082 CV-31348 Failed to Remain Open

WO 700060082 21 Letdown Orifice Isolation CV B 09/19/2019

WO 700060082- Place CV-31348 21 Letdown Orifice Isolation CV B 08/05/2019

0010

WO 700060082- Install/Remove Bypass - 21 Letdown Orifice Isolation CV B 08/05/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

20

71111.15 Corrective Action AR 22 Inverter Bypassed During SP 2318.3 07/16/2019

Documents 501000029636

AR SP 1151B Air Start Compressor 07/31/2019

501000030179

AR Erratic Behavior on Control Rod F12 08/25/2019

501000031191

AR Rod F12 Erratic Indication 08/26/2019

501000031203

Miscellaneous AR PL5 Amber on 22 Inverter Not Lit 07/17/2019

501000029646

SP 1319 Rod Position Verification 25

Operability 1C5 AOP5 Misaligned Rod, Stuck Rod, and/or RPI Failure or Drift 12

Evaluations TP 1018C Rod Position Indication Adjustments 10

[2018C]

Work Orders 50.59Screening / CV-31348 Bypass Request 0

WO 700060082

71111.18 Engineering 50.59 Screening Change Normal Position of RHR Pit Covers to Open 0

Evaluations 5590

50.59 Screening Revision to Post-LOCA EAB, LPZ, and CR Doses - AST 0

5597

71111.19 Corrective Action AR CV-31953 Air Leak 07/15/2019

Documents 501000029582

AR As Found Condition of CV-31953 (WO 700059376) 07/18/2019

501000029778

AR Post Mortem Test of Removed SV-33644 (D1 Diesel 07/24/2019

501000029820 Generator Air Start SV A)

AR Part 21 Evaluation for SC-33644 07/25/2019

501000030046

AR SP 1151B Air Start Comp (22 DDCLP Cooling Water Pump) 07/31/2019

501000030179

AR SP 1130A Functional Check Unsatisfactory 08/07/2019

501000030496

AR DPS-16445 Found Out of Tolerance 08/07/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

501000030497

AR 63H/16455 Relay Did Not Move During T/S 08/08/2019

501000030518

AR Fuse Blown for CV-31621 Work 08/07/2019

501000030583

AR Erratic Behavior on Control Rod F12 (Cont. Rod Bank A 08/25/2019

501000031191 Group 2 POS F12)

AR SV-37154 Failed PMT 09/16/2019

501000031934

AR SV-37154 PMT Results 09/16/2019

501000031937

AR SV-37152 Failed PMT 09/18/2019

501000032009

Drawings NE-40009 Sheet Containment Vessel Vacuum Breaker CV B (CV-31625) CZ

135

NF-39255-1 Flow Diagram Diesel Generators D1 and D2 - Unit 1 and 2 07/09/2019

NF-40764-2 Interlock Logic Diagram Shield Building Ventilation System - 76

Unit 1

Procedures SP 1319 Rod Position Verification 25

TP 1018C Rod Position Indication Adjustments 10

[2018C]

Work Orders WO 700060082 21 Letdown Orifice Isolation CV B 09/19/2019

71111.22 Drawings NF-39252 Flow Diagram Caustic Addition System Units 1 and 2 83

NF-40320-3 Interlock Logic Diagram Containment Spray Caustic Addition 76

System-Units 1 and 2

Procedures SP 1101 12 Motor-Driven Auxiliary Feedwater Pump Quarterly Flow 70

and Valve Test

SP 2155A CC System Quarterly Test Train A (WO 57247) 40

SP 2251 Caustic Addition Valve Quarterly Test 16

TP 1869A 121 FLEX 300 kW Diesel Generator Test and Inspection 5

(034-071)

Work Orders WO 700050900 SP 2251 Caustic Addition Valve Quarter Test 07/02/2019

71152 Corrective Action AR 23 Charging Pump Suction Vibrations 06/13/2019

Documents 501000030697

Inspection Type Designation Description or Title Revision or

Procedure Date

AR Increased Vibrations on 22 Charging Pump 09/18/2019

501000032036

Corrective Action AR 22 Changing Pump Suction Vibrating 07/12/2019

Documents 501000029497

Resulting from AR Possible Bad Suction Stabilizer on 23 Charging Pump 07/12/2019

Inspection 501000029513

17