IR 05000315/2020003

Integrated Inspection Report 05000315/2020003 and 05000316/2020003

ML20302A422
Person / Time
Site:	Cook
Issue date:	10/28/2020
From:	Nestor Feliz-Adorno Reactor Projects Region 3 Branch 4
To:	Gebbie J Indiana Michigan Power Co
References
IR 2020003
Download: ML20302A422 (13)

Text

October 28, 2020

SUBJECT:

DONALD C. COOK NUCLEAR PLANT - INTEGRATED INSPECTION REPORT 05000315/2020003 AND 05000316/2020003

Dear Mr. Gebbie:

On September 30, 2020, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Donald C. Cook Nuclear Plant. On October 8, 2020, 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,

/RA/

Néstor J. Féliz Adorno, Chief Branch 4 Division of Reactor Projects

Docket Nos. 05000315 and 05000316 License Nos. DPR-58 and DPR-74

Enclosure:

As stated

Inspection Report

Docket Numbers:

05000315 and 05000316

License Numbers:

DPR-58 and DPR-74

Report Numbers:

05000315/2020003 and 05000316/2020003

Licensee:

Indiana Michigan Power Company

Facility:

Donald C. Cook Nuclear Plant

Location:

Bridgman, Michigan

Inspection Dates:

July 01, 2020 to September 30, 2020

Inspectors:

J. Bozga, Senior Reactor Inspector

J. Mancuso, Resident Inspector

J. Neurauter, Senior Reactor Inspector

P. Zurawski, Senior Resident Inspector

Approved By:

Néstor J. Féliz Adorno, Chief

Branch 4

Division of Reactor Projects

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at the Donald C. Cook Nuclear 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.

PLANT STATUS

Unit 1 and Unit 2 began the inspection period at rated thermal power. On September 16, 2020, Unit 1 was shutdown for a scheduled refueling outage and remained shutdown through the end of the inspection period. Unit 2 had an unplanned shutdown on September 4, 2020, due to a failed pressurizer relief valve. After correction of the issue, the unit was returned to rated thermal power on September 9, 2020, where it remained for the rest 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 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 (COVID-19), resident inspectors were directed to begin telework and to remotely access licensee information using available technology. During this time the resident inspectors performed periodic site visits each week and during that time conducted plant status activities as described in IMC 2515, Appendix D; observed risk significant activities, and completed on-site portions of IPs. In addition, resident and regional baseline inspections were evaluated to determine if all or a portion of the objectives and requirements stated in the IP could be performed remotely. If the inspections could be performed remotely, they were conducted per the applicable IP. In some cases, portions of an IP were completed remotely and on-site. The inspections documented below met the objectives and requirements for completion of the IP.

71111.01 - Adverse Weather Protection

Seasonal Extreme Weather Sample (IP Section 03.01) (1 Sample)

(1) The inspectors evaluated readiness for seasonal extreme weather (summer hot temperature conditions) for the following systems, July 2 through July 9, 2020:

• Switchyard

• Main Transformers

• Emergency Diesel Generator (EDG)

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 below from impending severe weather [Midwest Derecho High Winds] on August 10, 2020:

• Main Transformers

• Circulating Water

71111.04 - Equipment Alignment

Partial Walkdown Sample (IP Section 03.01) (6 Samples)

The inspectors evaluated system configurations during partial walkdowns of the following systems/trains:

(1) Unit 1 CD EDG with Unit 1 AB EDG inoperable on July 7, 2020

(2) Unit 2 AB EDG with Unit 2 CD EDG inoperable on July 27, 2020

(3) Unit 2 control room instrument distribution alternate power source with main power source inoperable on July 28, 2020

(4) Unit 1 west charging pump with Unit 1 east charging pump inoperable on July 30, 2020

(5) Unit 2 west motor-driven auxiliary feedwater pump (MDAFWP) with Unit 2 east MDAFWP inoperable for maintenance on August 5, 2020

(6) Unit 1 component cooling water (CCW) heat exchanger on September 24, 2020

71111.07A - Heat Sink Performance

Annual Review (IP Section 03.01) (1 Sample)

The inspectors evaluated readiness and performance of:

(1) Unit 1 east and west CCW heat exchanger inspection on August 17, 2020

71111.12 - Maintenance Effectiveness

Maintenance Effectiveness (IP Section 03.01) (3 Samples)

The inspectors evaluated the effectiveness of maintenance to ensure the following structures, systems, and components remain capable of performing their intended function:

(1) Reserve auxiliary transformer maintenance the week of July 6, 2020 (2)2AB EDG maintenance the week of July 20, 2020 (3)2CD EDG maintenance the week of July 27, 2020

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (6 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) Scheduled Unit 1 work (reserve auxiliary transformer and EDG) for the week of July 6, 2020 (2)2AB EDG due to room ventilation supply fan and day tank enclosure fan motor fire on July 13, 2020

(3) Scheduled Unit 2 work (2CD EDG, emergency service water, safety injection pump)for the week of July 27, 2020

(4) Maintenance Rule (a)(1) - Unit 2 non-essential service water (NESW) System on July 21, 2020

(5) Maintenance Rule (a)(1) - Unit 2 Nuclear Instrument NI-01 on July 24, 2020

(6) Unit 1 east essential service water (ESW) backwash air fitting - unplanned limiting condition for operation on August 7, 2020

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (4 Samples)

The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:

(1) Action Request (AR) 2020-5522 & 5534; Increase of leaks on 1AB EDG jacket water and 1-HE-47-ABS EDG aftercooler leaking from two bolts on July 13, 2020

(2) AR 2020-5502; Unverified assumption - calculation 2-E-N-ELCP-120-002 on July 13, 2020

(3) AR 2020-5860; Dirty EDG sub-panel air supply screens on July 23, 2020

(4) AR 2020-6007; Thru wall leak at equalizing line on Unit 1 East centrifugal charging pump on August 1, 2020

71111.18 - Plant Modifications

Temporary Modifications and/or Permanent Modifications (IP Section 03.01 and/or 03.02) (2 Samples)

The inspectors evaluated the following temporary or permanent modifications:

(1) Engineering Change 0000057627; Replace 2-HV-DGX-3 Motor on July 27, 2020

(2) Unit 1 ESW temporary configuration change for broken airline on August 7, 2020

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) (6 Samples)

The inspectors evaluated the following post maintenance test activities to verify system operability and functionality:

(1)2-IMO-312; Unit 2 residual heat removal (RHR) heat exchanger on July 1, 2020

(2) Unit 1 CO2 fire suppression system following maintenance on July 1, 2020 (3)1-HV-CLV-1A; Unit 1 lower containment vent unit on July 2, 2020

(4) Unit 2 west containment spray system test on July 20, 2020 (5)2-OHP-4040-208-051N; Unit 2 north safety injection (SI) pump surveillance on July 31, 2020

(6) Unit 2 CD EDG after maintenance on August 3, 2020

71111.20 - Refueling and Other Outage Activities

Refueling/Other Outage Sample (IP Section 03.01) (1 Sample 1 Partial)

(1) The inspectors evaluated activities during a forced outage for Unit 2 due to a failed pressurizer spray valve from September 4 to September 7, 2020.

(2)

(Partial)

The inspectors evaluated Unit 1 Refueling Outage activities from September 15 to September 30, 2020. The refueling outage remained ongoing as of the end of the inspection period.

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance tests:

Surveillance Tests (other) (IP Section 03.01)

(1)2CD EDG operability surveillance on July 27, 2020

(2) Unit 1 north SI pump on July 29, 2020

(3) Unit 2 4kV bus loss of voltage and 4kV bus degraded voltage relay test on August 4, 2020

(4) Unit 1 Train B reactor protection system and engineered safety feature reactor trip breaker and solid-state protection system automatic trip and logics test on August 17, 2020

Inservice Testing (IP Section 03.01) (1 Sample)

(1) Unit 2 west containment spray system test on July 20, 2020

71114.06 - Drill Evaluation

Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)

The inspectors evaluated:

(1) An emergency planning drill on August 25,

OTHER ACTIVITIES - BASELINE

===71151 - Performance Indicator Verification

The inspectors verified licensee performance indicators submittals listed below:

IE01: Unplanned Scrams per 7000 Critical Hours Sample (IP Section 02.01)===

(1) Unit 1 (January 1, 2019 through December 31, 2019)

(2) Unit 2 (January 1, 2019 through December 31, 2019)

IE03: Unplanned Power Changes per 7000 Critical Hours Sample (IP Section 02.02) (2 Samples)

(1) Unit 1 (January 1, 2019 through December 31, 2019)

(2) Unit 2 (January 1, 2019 through December 31, 2019)

IE04: Unplanned Scrams with Complications Sample (IP Section 02.03) (2 Samples)

(1) Unit 1 (January 1, 2019 through December 31, 2019)

(2) Unit 2 (January 1, 2019 through December 31, 2019)

MS05: Safety System Functional Failures Sample (IP Section 02.04) (2 Samples)

(1) Unit 1 (January 1, 2019 through December 31, 2019)

(2) Unit 2 (January 1, 2019 through December 31, 2019)

MS08: Heat Removal Systems (IP Section 02.07) (2 Samples)

(1) Unit 1 (July 1, 2019 through June 30, 2020)

(2) Unit 2 (July 1, 2019 through June 30, 2020)

MS09: Residual Heat Removal Systems (IP Section 02.08) (2 Samples)

(1) Unit 1 (July 1, 2019 through June 30, 2020)

(2) Unit 2 (July 1, 2019 through June 30, 2020)

MS10: Cooling Water Support Systems (IP Section 02.09) (2 Samples)

(1) Unit 1 (July 1, 2019 through June 30, 2020)

(2) Unit 2 (July 1, 2019 through June 30, 2020)

71152 - Problem Identification and Resolution

Annual Follow-Up of Selected Issues (IP Section 02.03) (2 Samples 1 Partial)

The inspectors reviewed the licensees implementation of its corrective action program related to the following issues:

(1)

(Partial)

AR 2020-4198; Design Basis Non-Conformance of Containment Penetrations CPN-16 & 47 (RHR Normal Cooldown Flow Path, Supply & Return) on July 1, 2020

(2) AR 2020-5344; Unexpected Control Rod Motion (Unit 1) - Power Range N-32 Spiked High on July 6, 2020

(3) AR 2020-6007; Thru-Wall Leak at Equalizing Line on Unit 1 East Centrifugal Charging Pump on August 1,

INSPECTION RESULTS

Observation: Active Leak at Unit 1 East Charging Pump (1-PP-50E) Discharge Side Flange Equalization Line 71152 The inspectors performed a detailed review of AR 2020-6007; "Leak at Equalizing Line of U1 E CCP. For the Problem Identification and Resolution Annual Sample, the inspectors focused on assessment of the licensee's corrective actions taken to date and those planned from this point forward. The licensee performed a repair to the leak at the equalization line for the Unit 1 East Charging Pump (1-PP-50E). The inspectors reviewed the work order associated with this repair as well as the post repair non-destructive examination information.

The inspectors concluded that the licensee's actions taken in accordance with their corrective action program were reasonable given the overall safety significance of the issue. Based on the inspector's review, no concerns were identified.

Observation: Unexpected Control Rod Motion 71152 The inspectors performed a detailed review of AR 2020-6603, U-1 control rod stepped in one-half step and AR-2020-5344, "Unexpected Control Rod Motion in Unit 1." On July 3, 2020, AR 2020-5344 identified unexpected control rod motion in Unit 1 by control bank D unexpectedly moving inward 0.5 steps. Immediate operational action was taken, and the appropriate procedures were entered. Operators noted a temperature error from a power mismatch (momentary spike) had occurred which appeared to originate from nuclear instrumentation N-42. On August 24, 2020, AR 2020-6603 identified a similar occurrence of an unexpected one-half step on the control rods with an associated spike on nuclear instrumentation N-42. For this Problem Identification and Resolution Annual Sample, the inspectors focused on assessment of the licensee's corrective actions taken to date and those planned from this point forward. The licensee evaluated the occurrences, determined that power range indications were related to end of core life behavior and established end of core life procedural guidance. The inspectors concluded that the licensee's actions taken in accordance with their corrective action program were reasonable given the overall safety significance of the issue. Based on the inspector's review, no concerns were identified.

EXIT MEETINGS AND DEBRIEFS

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

• On October 8, 2020, the inspectors presented the integrated inspection results to Mr. J. Gebbie, Senior Vice President, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

71111.01

Procedures

2-OHP-4022-

001-010

Severe Weather

PMP-5055-SWM-

001

Severe Weather Guidelines

71111.04

Procedures

1-OHL-5030-

SOM-005

Unit 1 Tours - Unit 1 Auxiliary Tour

1-OHP-4021-003-

001

Letdown, Charging, and Seal Water Operations

1-OHP-4030-156-

017E

East Motor Driven Auxiliary Feedwater System Test

71111.07A Procedures

2-EHP-8913-

001-02

Heat Exchange Inspection

Work Orders

2-EHP-8913-

001-002

Unit 1 West Component Cooling Water Heat Exchanger

(1-HE-15W)

55509691-06

Unit 1 East Component Cooling Water Heat Exchanger

(1-HE-15E)

55510487-08

West Component Cooling Water Heat Exchanger

71111.12

Procedures

2-OHP-4030-232-

27AB

AB Diesel Generator Operability Test (Train B)

2

2-OHP-4030-232-

27CD

CD Diesel Generator Operability Test (Train A)

Work Orders

55522389-01

CD Diesel Generator

55532220-01

Unit 1 Reserve Auxiliary Transformer TR101CD

71111.13

Corrective Action

Documents

AR 2020-5542

2-HV-DGS-2 Found Not Running During EDG Surveillance

AR 2020-5542

2-HV-DGS-2 Found Not Running During EDG Surveillance

AR 2020-5545

Fire U2 AB EDG Room

AR 2020-5545

Fire U2 AB EDG room

Engineering

Changes

EC 57627

2-HV-DGX-3 Motor Replacement

Miscellaneous

Cook Unit 1 & 2 Online Risk Cycle 115, Week 05

07/27/2020

Risk Profile for the Week of July 27, 2020

Risk Profile for the Week of July 7, 2020

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

Cook Unit 1 & 2 Online Risk Cycle 115, Week 02

07/06/2020

Cook Nuclear Plant Key Maintenance and Testing Schedule

07/06/2020

Work Orders

55549208

Fire U2 AB Room

07/13/2020

55549287

AB EDG Room Vent Abnormal Vent Alarm Came in During

Extended EDG Run

07/14/2020

55550267

1-WRV-761 Unit 1 East ESW Strainer Outlet Valve

08/07/2020

71111.15

Calculations

2-E-N-ELCP-120-

20VAC Control Room Instrumentation Distribution (CRID)

Loading and Voltage Drop Analysis - Unit 2

Corrective Action

Documents

AR 2020-5502

Track Unverified Assumption - Calculation 2-E-N-ELCP-120-

2

AR 2020-5522

Increase of Leaks on 1AB EDG Jacket Water

AR 2020-5860

Dirty EDG Sub-Panel Air Supply Screens

AR 2020-6007

Thru Wall Leak at Equalizing Line on Unit 1 East Centrifugal

Charging Pump

AR-2020-5534

1-HE-47-ABS EDG Aftercooler Leaking from Two Bolts

Engineering

Changes

0000055545-TP-

2

Unit 2 Control Room Instrumentation Diagram Steady State

Circuit Current Recording

Miscellaneous

DIT-B-00197-09

Design Information Transmittal - Area Temperature and

Relative Humidity for Selected Plant Areas Outside

Containment

2/16/2000

71111.18

Engineering

Changes

EC0000057627

Replace 2-HV-DGX-3 Motor

07/22/2020

71111.19

Procedures

2-MHP-5021-

2-146

Emergency Diesel Generator System Mechanical

Maintenance

2-OHP-4030-208-

053A

HE-17E Outlet Flow Control Valve 2-IRV-310 Stroke Test -

RHR in Service

2-OHP-4030-209-

007W

West Containment Spray System Test

Work Orders

55530794-02

East RHR Heat Exchanger 2-IMO-312

55535313-21

1-HV-CLV-1A-MTR, Containment Lower Compartment Quad

1. 1 Vent Unit Exhaust Fan HV-CLV-1A Motor

06/30/2020

71111.22

Procedures

1-IHP-4030-001B

Train 'B' Solid State Protection System (SSPS) Automatic Trip and Actuation Logic Operational Test (TADOT,

Actuation Logic Test and Master Relay Test) and Reactor

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

Trip Breaker Operational Test (TADOT)

2-OHP-4030-208-

051N

North Safety Injection Pump System Test

2-OHP-4030-209-

007W

West Containment Spray System Test

2-OHP-4030-232-

27D

2CD Diesel Generator Operability Test (Train A)

07/26/2020

PMP-2291-WMP-

001

PMP-2291-WMP-001

Work Orders

55543997-01

Unit 1 - Perform Procedure 1-IHP-4030-111-01B

08/12/2020

55546678-01

West Containment Spray System Test

07/20/2020

55546679-01

2-OHP-4030-208-051N; North Safety Injection Pump System

Test

07/28/2020

55549335-01

PMP-2291-WMP-001, 4kV Bus Loss of Voltage and 4kV Bus

Degraded Voltage Relay test

07/15/2020

71114.06

Miscellaneous

August 25, 2020 Emergency Planning Drill Scenario

71151

Miscellaneous

Operational Narrative Logs (January 1, 2019 through

December 31, 2019)

71152

Corrective Action

Documents

AR 2020-4198

AR 2020-4198; Design Basis Non-Conformance of

Containment Penetrations CPN-16 & 47

AR 2020-5344

Unexpected Control Rod Motion in Unit 1

AR 2020-6007

Leak at Equalizing Line of U1 E CCP

07/29/2020

AR 2020-6043

WOs Requested for 2 to 1 Fillet Welds on CCP Balance

Line

07/30/2020

AR 2020-6603

U1 Control Rods Stepped in One Half Step

Miscellaneous

20-5344 White

Paper

Reactor Engineering (Verteramo) White Paper (2020-5344)

Work Orders

55549905-01

1-PP-50E Repair Leak at Equalizing Line on U1 CCP

07/29/2020

55549905-02

1-PP-50E Perform Leak Inspection (PMT)

07/30/2020