IR 05000331/2019003

Integrated Inspection Report 05000331/2019003

ML19317E420
Person / Time
Site:	Duane Arnold
Issue date:	11/12/2019
From:	Billy Dickson NRC/RGN-III/DRP/B2
To:	Dean Curtland NextEra Energy Duane Arnold
References
IR 2019003
Download: ML19317E420 (16)

Text

ber 12, 2019

SUBJECT:

DUANE ARNOLD ENERGY CENTER, UNIT 1 - INTEGRATED INSPECTION REPORT 05000331/2019003

Dear Mr. Curtland:

On September 30, 2019, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Duane Arnold Energy Center, Unit 1. On October 3, 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.

The NRC inspectors did not identify any finding or violation of more than minor significance.

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/

Billy C. Dickson, Jr., Chief Branch 2 Division of Reactor Projects Docket No. 05000331 License No. DPR-49

Enclosure:

As stated

Inspection Report

Docket Number: 05000331 License Number: DPR-49 Report Number: 05000331/2019003 Enterprise Identifier: I-2019-003-0066 Licensee: NextEra Energy Duane Arnold, LLC Facility: Duane Arnold Energy Center, Unit 1 Location: Palo, Iowa 52324 Inspection Dates: July 01, 2019 to September 30, 2019 Inspectors: B. Bartlett, Senior Operations Engineer J. Beavers, Senior Resident Inspector S. Bell, Health Physicist L. Kozak, Senior Reactor Analyst V. Myers, Senior Health Physicist C. Norton, Senior Resident Inspector T. Ospino, Reactor Engineer J. Rutkowski, Project Engineer S. Sheldon, Project Engineer Approved By: Billy C. Dickson, Jr., Chief Branch 2 Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at Duane Arnold Energy Center, Unit 1 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

Duane Arnold operated at or near rated thermal power for the entire 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 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 External Flooding Sample (IP Section 03.04)

(1) The inspectors evaluated readiness to cope with external flooding for the following areas:

• Safety related structures and systems on July 16 and 17, 2019

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

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

(1) Control rod drive system on July 17, 2019

(2) 'A' standby diesel generator air start valves on September 4, 2019

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

The inspectors evaluated fire protection program implementation in the following selected areas:

(1) Water pump house on July 18, 2019

(2) Administration Building First Floor Fire Zone 20-A and 20-C on July 24, 2019

(3) Reactor Building Elevation 757 Fire Zone 2-F and 2-K on July 24, 2019

(4) Reactor Building Elevation 757 North Fire Zone 8-A on July 24, 2019

(5) Turbine Building Elevation 757 South Fire Zone 8-D and 8-E on July 24, 2019

(6) Turbine Building Elevation 757 North Fire Zone 8-A on July 24, 2019

(7) Turbine Building Elevation 780 Fire Zone 9-A, 9-B, and 9-C on July 24, 2019

(8) Control Room Complex Elevation 786 Fire Zone 12-A on July 23, 2019

(9) Control Room Heating, Ventilation, and Air Conditioning Elevation 800 Fire Zone 12-B on July 23, 2019

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 control rod sequence exchange on July 27, 2019 Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)

(1) The inspectors observed and evaluated licensed operator re-qualification activity on September 10, 2019

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

The inspectors evaluated the effectiveness of routine maintenance activities associated with the following equipment and/or safety significant functions:

(1) 'B' standby diesel generator ventilation fan exhaust damper on July 11, 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) 'C' river water supply pump on July 15, 2019

(2) Diesel fire pump on July 26, 2019

(3) Transformer XR1 supply breaker preventative maintenance on August 5, 2019

(4) Well water flow recorder replacement on August 7, 2019

(5) 'B' standby diesel generator emergent fuel leak repair on August 13, 2019

(6) Backup instrument air compressor, 1K1, preventive maintenance on August 28, 2019

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

The inspectors evaluated the following operability determinations and functionality assessments:

(1) 'B' standby diesel generator exhaust damper operator failed on July 8, 2019

(2) 'C' river water supply pump on July 11, 2019

(3) Minimum critical power ratio error on July 31, 2019

(4) Loss of Control Room alarm horn on July 31, 2019

(5) 'A' standby diesel generator missing turbo charger bolt on August 16, 2019

(6) 'A' standby diesel generator starting air check valve, V-32-43, failed surveillance on September 4, 2019

(7) A control building chiller trouble on September 25, 2019

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

The inspectors evaluated the following post maintenance tests:

(1) 'B' standby diesel generator ventilation fan exhaust damper post maintenance test on July 11, 2019

(2) Diesel fire pump post maintenance test on July 30, 2019

(3) 'C' river water supply pump post maintenance test on July 23, 2019

(4) 'B' standby diesel generator post maintenance test following fuel leak repair on August 14, 2019

(5) Backup instrument air compressor, 1K1, post maintenance test on August 28, 2019

(6) 'A' standby diesel generator air start check valve on September 20, 2019

(7) KAMAN 6 on September 30, 2019

71111.22 - Surveillance Testing The inspectors evaluated the following surveillance tests: Surveillance Tests (other) (IP Section 03.01)

(1) 'A' river water supply and screen wash system vibration measurement and operability test on July 11, 2019

(2) Portions of the Control Room operations associated with the main steam isolation valve functional test on July 29, 2019

(3) Remote shutdown panel surveillance test on September 10, 2019

(4) 'A' standby diesel generator air compressor and air start check valve tests on September 3, 2019

Inservice Testing (IP Section 03.01) (3 Samples)

(1) In field activities associated with low pressure coolant injection operability test on August 14, 2019

(2) In field activities associated with the A standby diesel generator air compressor and air start check valve tests on September 3, 2019

(3) Portions of the Control Room operations associated with the high pressure coolant injection system operability test on July 16, 2019

FLEX Testing (IP Section 03.02) (1 Sample)

(1) Flex 120 volt portable diesel generators functional and performance tests on September 24, 2019

71114.06 - Drill Evaluation Drill/Training Evolution Observation (IP Section 03.02)

The inspectors evaluated:

(1) Emergency response tabletop drill on August 7,

71124.07 - Radiological Environmental Monitoring Program Site Inspection (IP Section 02.01)

The inspectors evaluated the radiological environmental monitoring program implementation.

(1) The inspectors reviewed the following:

Walkdowns, Calibrations, and Maintenance Record Review

• Air sampling station; D-3

• Air sampling station; D-4

• Air sampling station; D-5a

• Environmental dosimeter; D-3

• Environmental dosimeter; D-4

• Environmental dosimeter; D-5a Environmental Sample Collections and Preparation Observation

• Milk sampling location; D-110

• Milk sampling location; D-138

• Airborne particulate and iodine; D-3 Licensee Actions in Response to Missed Sample, Inoperable Sampler, Lost TLD or Anomalous Measurement

• Missed milk sample; 01/09/2018

• Missed air particulate sample; 07/20/2018

• Low sample volume for air particulate and iodine sample; 06/02/2017 Sampling Program for the Potential of Licensed Material Entering Groundwater

• Condensate Storage Tanks

• Reactor Building

• Turbine Building Groundwater Protection Initiative (GPI) Implementation (IP Section 02.02) (1 Sample)

(1) The inspectors evaluated the licensees voluntary groundwater protection initiative.

OTHER ACTIVITIES - BASELINE

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

MS06: Emergency AC Power Systems (IP Section 02.05) ===

(1) Unit 1 (July 1, 2018 to June 30, 2019)

MS07: High Pressure Injection Systems (IP Section 02.06) (1 Sample)

(1) Unit 1 (July 1, 2018 to June 30, 2019)

MS08: Heat Removal Systems (IP Section 02.07) (1 Sample)

(1) Unit 1 (July 1, 2018 to June 30, 2019)

71152 - Problem Identification and Resolution Semiannual Trend Review (IP Section 02.02)

(1) The inspectors reviewed the licensees corrective action program for reactor water cleanup pumps seal leaks for trends that might be indicative of a more significant safety issue on August 16, 2019 Annual Follow-up of Selected Issues (IP Section 02.03) (1 Sample)

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

(1) The occurrence of numerous seemingly unrelated Control Room alarm issues that began in May 2019, was reviewed between August 6 and August 23, 2019

71153 - Follow-up of Events and Notices of Enforcement Discretion Event Follow-up (IP Section 03.01)

(1) Loss of feed water trip and licensee's response on August 1, 2019

Personnel Performance (IP Section 03.03) (1 Sample)

Pump House Fire AOP Entry Following Maintenance on August 1, 2019

(1) The inspectors evaluated pump house fire and the licensee's response on August 1,

INSPECTION RESULTS

Observation: Integrated Control Room Annunciator Issues 71152 The licensee documented numerous control room annunciator issues beginning in May 2019 for the 1C05B panel alarms. The initial issue was a failure of the annunciator horn to silence.

As part of the trouble shooting, all the alarm cards on 1C05B were removed and re-seated.

Subsequent issues included failure of some 1C05B alarms to annunciate when tested and 1C05B alarm power supply fuses blowing. These were all addressed as single issues and corrected individually.

Early in August 2016, the licensee wrote a condition report to address the aggregate 1C05B annunciator issue. The licensee determined that the alarm cards were not fully seated during the trouble shooting for failure of the annunciator horn to silence in May 2019. After re-seating the alarm cards, 1C05B annunciator issues ceased.

Observation: Corrective Action Program for Reactor Water Cleanup Pumps Seal 71152 Leaks The inspectors reviewed the licensee's problem identification and resolution activities associated with the reactor water coolant pump seal leaks over the past six months. The licensees corrective action program documented alternating and sequential mechanical seal failures on both pumps. The maintenance efforts resulted in a mixed success as A pump was returned to service with no leakage. The B pump was returned to service with nearly 300 drops per minute. This leakage, however, was well below the technical specifications limit.

The inspectors noted that continuous monitoring of reactor coolant conductivity as well as providing continuous purification of recirculation flow has been maintained during this inspection period.

EXIT MEETINGS AND DEBRIEFS

The inspectors confirmed that proprietary information was controlled to protect from public disclosure.

• On October 3, 2019, the inspectors presented the integrated inspection results to Mr. D. Curtland, Director of Site Operations, and other members of the licensee staff.

• On August 15, 2019, the inspectors presented the Radiation Protection Baseline Inspection results to Mr. M. Davis, Licensing Manager, and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.01 Engineering Flex-Flood MSA Mitigating Srategies Assessment for Flooding Hazard 11/01/2016

Evaluations Reevaluation

Miscellaneous UFSAR/DAEC - 1 Flood Protection 24

Section 3.4.1

UFSAR/DAEC-1 Hydrologic Engineering 25

Section 2.4

Procedures AOP 902 Flood 62

71111.04Q Corrective Action Configuration Control R1-Clearance 2401-V32-043-01 0

Documents

Drawings BECH-M132<1> Diesel Generator System 21

BECH-M132<1> PI&D Diesel Generator 21

Procedures OI 255A2 Control Rod Drive System Valve Lineup 7

OI 255A3 Control Rod Drive System HCU Valve Lineup 3

STP 3.8.1-11A 'A' Standby Diesel Generator Air Compressor and Air Check 11

Valve Tests

71111.05Q Procedures PFP-PH-757 Pre-fire Plan Pump House 3

71111.11Q Miscellaneous Reactivity Management Plan Plant Down Power Sequence 07/26/2019

Exchange

Scenario ESG 2019D-01E Evaluated Scenario 0

Procedures IPOP-3 Power Operations 160

71111.12 Work Orders 40673592 Standby Diesel Generator Exhaust Damper Operator Failed 0

71111.13 Corrective Action 1-2699-0-D-E1101; Schematic-36V Breaker GB SW5980 0

Documents 2320630 'C' River Water Supply Pump 1P117C 0

21822 Injector Push Tubes Damaged due to Vendor Maladjustment 0

220761 1P117C Vibration Above Alert Limit 0

Condition Report Fuel Leak on Cylinder 2 Fuel Head Drain Connection 08/12/2019

2324122

Engineering 291019 Rec-FR4414G 01

Changes

Procedures STP NS 190101 Standby Service Air Compressor (1K1) Operability Test 20

Work Orders 40585931 FR4414G Replace Recorder Per EC 01

Inspection Type Designation Description or Title Revision or

Procedure Date

40593711-01 Braze New Fitting on #2 CS Clean Fuel Oil Drain Header 0

40622298 1P-49-E Annual Engine Inspection with Vendor 0

40625584 Backup Instrument Air Compressor 08/28/2019

40626684 CB5980; SF6 Breaker Inspection 0

40630194 Backup Instrument Air Compressor 08/28/2019

40630701 Intercooler 1E-241 Automatic Drain Trap 08/27/2019

40630702 Aftercooler 1E-242 Automatic Drain Trap 08/27/2019

40673886 'C" River Water Supply Pump 0

71111.15 Corrective Action 2307849 'A' Rod Block Monitor Anomalous Behavior 0

Documents 2307896 'B' Rod Block Monitor Anomalous Behavior 0

20205 'B' Standby Diesel Exhaust Damper Operator Failed 0

22707 Missing bolt on Turbo Charger Inlet 0

22820 Identified Legacy MCPR Error 0

22883 Loss of 1C05 Alarms 21

22883 Loss of 1C05 Alarms 0

Condition Report 'A' Standby Diesel Generator Starting Air Check Valve, 0

2635 V-32-43 Failed Surveillance

Drawings BECH-M132<1> Diesel Generator System 21

Procedures AOP 302.2 Loss of Alarm Panel Power 21

STP 3.8.1-11A 'A' Standby Diesel Generator Air Compressor and Air Start 11

Check Valves Tests

71111.19 Corrective Action GMP-TEST-60; 'B' Standby Diesel Generator 1G-21 Room 10

Documents Heating Ventilation, and Air ConditioningTest

2328178 Unable to Calibrate KAMAN 6 per Surveillance Test 0

Procedure

2328807 1C26A(B-5) 'A' Chiller 1V-CH-1A Trouble Activated 0

2328927 1C-330B K-6 Microcomputer Not Updating to PPC 0

NS13B009 Diesel Driven Fire Pump Functional Tests and Fuel Oil 53

Supply Verification

Miscellaneous Work Request Braze New Fitting on #2 CS Clean Fuel Oil Drain Header 0

40593711-01

Procedures Operating Standby Diesel Generator System 26

Instruction-324

Inspection Type Designation Description or Title Revision or

Procedure Date

Operating Standby Diesel Generator System 126

Instruction-324

STP 3.7.5-01A 'A' Control Building Chiller Operability 6

STP 3.8.1-11A Standby Diesel Generator Air Compressor and Air Start 11

Check Valve Test

STP NS 190101 Standby Service Air Compressor (1K1) Operability Test 20

STP NS340003 Reactor Building Monitor Flow Test Dated 09-16-2019 17

STP NS340003 Reactor Building Flow Monitor Calibration Test Dated 17

09/25/2019

STP NS340003 Reactor Building Flow Monitor Calibration 17

Work Orders 40593711-01 Braze New Fitting on #2 CS Clean Fuel Oil Drain Header 0

40622298 1P049-E; Annual Engine Inspection with Vendor 0

40625584 Backup Instrument Air Compressor 08/28/2019

40630194 Backup Instrument Air Compressor 08/28/2019

40630701 Intercooler 1E-241 Automatic Drain Trap 08/27/2019

40630702 Aftercooler 1E-242 Automatic Drain Trap 08/27/2019

40673592 Standby Diesel Exhaust Damper Operator Failed 0

40682200-01 Air Receiver 1T-115A Oulet Check Valve 09/17/2019

40682200-01 Air Receiver 1t-115A Outlet Check Valve 09/18/2019

71111.22 Corrective Action Technical Specifications (and Bases); Amendment 25

Documents

Drawings BECH-M132<1> Diesel Generator System 21

Procedures STP 3.3.1.1-17 Main Steam Isolation Valve Functional Test 15

STP 3.3.3.2-15 Remote Shutdown Cooling Residual Heat Removal and 3

Residual Heat Removal Service Water Components

STP 3.5.1-05 High Pressure Coolant Injection Operability Test 83

STP 3.5.1-11B Low Pressure Coolant Injection System Operability Test and 18

Comprehensive Pump Test

STP 3.7.4-05B Standby Filter Unit 'B' Operation with Headers 11

STP 3.8.1-11A Standby Diesel Generator Air Compressor and Air Start 11

Check Valve Tests

STP NS 490003B 'B' Residual Heat Removal System Leakage Walk Down 4

Inspection

Inspection Type Designation Description or Title Revision or

Procedure Date

STP NS100203A 'A' River Water Supply and Screen Wash System Vibration 27

Measurement and Operability Test

STP NS240501 FLEX 120V Portable Diesel Generator Functional and 8

Performance Test for 1G102A/GEN; 1G102B/GEN;

1G102C/GEN

71114.06 Corrective Action CRS Tabletop 08-07-19 2

Documents

71124.07 Calibration Meteorological Tower Calibration 07/24/2019

Records Meteorological Tower Calibration 04/24/2019

Environmental Air Sampler Calibration Records 2018

Corrective Action AR 02251132 Level 1 Assessment - 2017 REMP TLD Assessment 02/23/2018

Documents AR 02252731 Met Tower 50M Wind Speed Sensor Failure 03/06/2018

AR 02253793 Level 1 Assessment Cs-137 in Soil Samples 03/12/2018

AR 02308312 REMP Air Sampler Power Failure at D-11 Toddville 04/01/2019

AR02324434 GWPP Extraction Well Flow Meter Failure 08/14/2019

Miscellaneous 2018 Annual Radiological Environmental Operating Report 05/14/2019

Quality Control for Radiological Environmental Records 05/30/2019

Environmental Air Sampling Station Logs 2018

Offsite Dose Assessment Manual 38-40

2017 Annual Radiological Environmental Operating Report 05/11/2018

Procedures ESP 4.3.1.15 Milk Sampling 34

ESP 4.5 Statistical Comparison of TLDs for Direct Radiation Impact 6

ESP 4.9 Groundwater Remediation 5

STP NS790710 Radioactive Liquid Release from Clean System 3

Self-Assessments NEI Audit of Groundwater Protection Program 12/28/2017

NRC Pre-Inspection Self-Assessment for IP 71124.06 and 07/09/2019

71124.07

Work Orders WO 40631719-01 Meteorological System Channel Checks 05/01/2019

71151 Corrective Action Monthly MSP/Maintenance Rule Data Entry Sheets; 1

Documents July 1, 2018 through June 30, 2019

71152 Corrective Action Condition Report 1C05B Annunciators Did Not Respond As Expected During 05/20/2019

Documents 023114966 Tests

Condition Report 1C05 Alarms Disabled for Approximately 1-Hour 05/09/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

2313876

Condition Report 1C05B (D-2) Failed to Activate During Testing 05/10/2019

2314063

Condition Report IC05B (D-2) Failed to Activate During Testing 05/10/2019

2314063

Condition Report 1C05B (C-4) Failed to Annunciate During Surveillance Test 06/11/2019

2317622 Procedure 3.3.1.1-04

Condition Report 1C05B (C-1) and (B-5) Annunciators Not Lighting When 06/29/2019

2319657 Tested

Condition Report Loss of 1C05 Alarms Lights and Horn 07/30/2019

2322883

Condition Report 1C05B A-7 Point Card 08/05/2019

2323487

Condition Report 1C05B Annunciator Panel Troubleshooting 08/07/2019

2323664

Condition Report 'B' Reactor Water Cleanup Pump Seal Leak 0

232792

Condition Report 'A' Reactor Water Cleanup Pump Seal Leak 0

293282

Condition Report 'B' Reactor Water Cleanup Pump Shaft Seal Leak 0

294880

Condition Report 'A' Reactor Water Cleanup Pump Loose Impeller 0

2302758

Work Orders 40582408 'B' Rector Water Cleanup Pump Lube Coupling 0

40642375 'B' Reactor Water Cleanup Pump Shaft Seal Leak 0

71153 Corrective Action BECH- Steam and Condensate System 11

Documents E108<004A>

BECH-M104<2> Feedwater Heaters 1E003A, 4A, 5A, 6A 28

Miscellaneous C07B Moisture Separator Reheater Second Stage Drain 96

Tanks 1T-92A to 1T-92B Pressure Differential High

Operating Shift Logs May 1, 2019 0

Operating Shift White Paper on Moisture Separator Drain 0

Tank High dp

Event Notification Loss of Feed Water Trip 04/22/2019

Inspection Type Designation Description or Title Revision or

Procedure Date

1. 54012

Procedures AOP 255.2 Power/Reactivity Abnormal Change 0

14