IR 05000338/2020001

Integrated Inspection Report 05000338/2020001 and 05000339/2020001

ML20129J825
Person / Time
Site:	North Anna
Issue date:	05/08/2020
From:	Stewart Bailey NRC/RGN-II/DRP/RPB4
To:	Stoddard D Virginia Electric & Power Co (VEPCO)
References
IR 2020001
Download: ML20129J825 (15)

Text

May 8, 2020

SUBJECT:

NORTH ANNA POWER STATION - INTEGRATED INSPECTION REPORT 05000338/2020001 AND 05000339/2020001

Dear Mr. Stoddard:

On March 31, 2020, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at North Anna Power Station. On April 7, 2020, the NRC inspectors discussed the results of this inspection with Mr. Larry Lane 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/

Stewart N. Bailey, Chief Reactor Projects Branch 4 Division of Reactor Projects Docket Nos. 05000338 and 05000339 License Nos. NPF-4 and NPF-7

Enclosure:

As stated

Inspection Report

Docket Numbers: 05000338 and 05000339 License Numbers: NPF-4 and NPF-7 Report Numbers: 05000338/2020001 and 05000339/2020001 Enterprise Identifier: I-2020-001-0028 Licensee: Virginia Electric & Power Co.

Facility: North Anna Power Station Location: Mineral, VA Inspection Dates: January 01, 2020 to March 31, 2020 Inspectors: M. Tobin, Senior Resident Inspector V. Petrella, Resident Inspector, Acting D. Bacon, Senior Operations Engineer M. Donithan, Operations Engineer Approved By: Stewart N. Bailey, Chief Reactor Projects Branch 4 Division of Reactor Projects Enclosure

SUMMARY

The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees performance by conducting an integrated inspection at North Anna Power Station, 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 began the inspection period at rated thermal power. On March 13, the unit was down powered to 85 percent to make repairs to the condenser waterbox. The site returned to rated thermal power on March 17 and remained at or near rated thermal power for the remainder of the inspection period.

Unit 2 began the inspection period at rated thermal power. On February 4, the unit was down powered to 92 percent to make repairs to a high pressure heater drain pump. The site returned to rated thermal power on February 8 and remained at or near rated thermal power 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/readingrm/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. From January 1 - March 19, 2020, 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.

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 during which they conducted plant status activities as described in IMC 2515, Appendix D, and observed risk significant activities when warranted. In addition, resident and regional baseline inspections were evaluated to determine if all or portions 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 the cases where it was determined the objectives and requirements could not be performed remotely, management elected to reschedule the inspection to a later date.

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) Unit 1 motor-driven auxiliary feedwater system on March 03, 2020

(2) Unit 2 quench spray system on February 25, 2020

(3) Unit 2 turbine-driven auxiliary feedwater system on March 02, 2020

(4) Unit 1 service water to the recirculation spray heat exchanger on March 14, 2020

Complete Walkdown Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated system configurations during a complete walkdown of the Unit 1 outside recirculation spray system on March 12, 2020.

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) Unit 1 turbine driven and motor driven auxiliary feedwater pumphouse on January 31, 2020

(2) Unit 2 turbine driven and motor driven auxiliary feedwater pumphouse on January 31, 2020

(3) Auxiliary building elevation 244' 6" on February 03, 2020

(4) Unit 1 Emergency Diesel Generator Rooms on January 28, 2020

(5) Unit 2 Emergency Diesel Generator Rooms on January 28, 2020

Fire Brigade Drill Performance Sample (IP Section 03.02) (1 Sample)

(1) The inspectors evaluated the onsite fire brigade training and performance during an unannounced fire drill on March 04, 2020.

71111.06 - Flood Protection Measures

Inspection Activities - Internal Flooding (IP Section 03.01) (1 Sample)

The inspectors evaluated internal flooding mitigation protections in the:

(1) Turbine building, main control room, and emergency switchgear room on March 18, 2020

71111.11B - Licensed Operator Requalification Program and Licensed Operator Performance

Licensed Operator Requalification Program (IP Section 03.04) (1 Sample)

(1) Biennial Requalification Written Examinations The inspectors evaluated the quality of the licensed operator biennial requalification written examinations administered on January 18 and January 25, 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 Sample)

(1) The inspectors observed and evaluated licensed operator performance in the control room during the Unit 1 ramp from approximately 85 percent power to approximately 100 percent power on March 16, 2020.

Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)

(1) The inspectors observed and evaluated two operator requalification exams on January 16, 2020.

71111.12 - Maintenance Effectiveness

Maintenance Effectiveness (IP Section 03.01) (2 Samples)

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

(1) Alternate AC power system on March 12, 2020

(2) Earthquake monitoring system on March 25, 2020

71111.13 - Maintenance Risk Assessments and Emergent Work Control

Risk Assessment and Management Sample (IP Section 03.01) (7 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) Unit 1 at elevated green risk due to 1H emergency diesel generator being inoperable on January 9, 2020

(2) Unit 2 in elevated green risk due to 2-CN-P-1B condensate pump motor lift, January 22, 2020

(3) Unit 2 in elevated green risk due to repack of the 2-SD-P-1C, high pressure heater drain pump, while 2-CN-P-1B, main condensate pump, is out of service on January 28, 2020

(4) Unit 1 at elevated green risk for an extended period of time while the 1J emergency diesel generator was out of service for a planned three-year overhaul on February 21, 2020

(5) Units 1 and 2 in elevated green risk due to service water pump 1A being out for screen wash system maintenance on March 9, 2020

(6) Units 1 and 2 in elevated green risk due to surveillance testing of the motor driven fire pump while protected due to diesel driven fire pump was out of service on March 26, 2020

(7) Unit 1 Medium Risk Plan for the 1-IA-C-1, Instrument Air Compressor, 18 Month Preventative Maintenance on January 28, 2020

71111.15 - Operability Determinations and Functionality Assessments

Operability Determination or Functionality Assessment (IP Section 03.01) (3 Samples)

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

(1) Unit 1 turbine driven auxiliary feedwater pump operability prior to isolation due to steam leak (CR1136838)

(2) Unit 1 H emergency diesel generator crankcase overpressure trip (CR1139519)

(3) Unit 1 H and Unit 2 H and J emergency diesel generators following indications of bearing wear on Unit 1 J diesel (CR1136269)

71111.18 - Plant Modifications

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

(1 Sample)

The inspectors evaluated the following temporary or permanent modification:

(1) Unit 1 emergency diesel generator 1H modifications to crankcase overpressure alignment on March 17, 2020

71111.19 - Post-Maintenance Testing

Post-Maintenance Test Sample (IP Section 03.01) (5 Samples)

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

(1) Unit 1 steam line piping to turbine driven auxiliary feedwater pump test after repairs on the steam piping on January 29, 2020

(2) Unit 2 top nozzle fuel reconstitution after replacing fuel pin with stainless steel rod on January 28, 2020

(3) Unit 1 service water traveling water screens and wash pumps after maintenance on March 25, 2020

(4) Unit 1 1-PT-82.4B, 1J Diesel Generator Test (Start by ESF Actuation), work order 59203290654

(5) Unit 2 charging pump 1B speed increaser, work order 59103069678, work order 59103133819, and work order 59103069684

71111.22 - Surveillance Testing

The inspectors evaluated the following surveillance tests:

Surveillance Tests (other) (IP Section 03.01)

(1) Unit 1 1-PT-82H, 1H Emergency Diesel Generator Slow Start Test on January 8, 2020

(2) Unit 2 MRS-GEN-1275-07, Fuel rod and fuel assembly visual inspection on January 14, 2020

(3) Unit 1 1-PT-301MS, Terry Turbine Main Steam Supply and 1-FW-P-2 System Pressure Test, on January 28, 2020

(4) Unit 1 1-PT-63.1A.2, Quench Spray System - "A" Subsystem Comprehensive Pump Test, work order 59203143074

(5) Unit 2 2-PT-71.3Q, 2-FW-P-3B Motor-Driven AFW Pump, and Valve Test, work order 59203294479

(6) Unit 1 1-PT-14.2, Charging Pump 1-CH-P-1B, work order 59203295648

Inservice Testing (IP Section 03.01) (1 Sample)

(1) 1-FW-P-2, Turbine Driven Auxiliary Feedwater Pump, IST Comprehensive Pump Test, and Valve Testing, work order

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 2019 - December 2019)

(2) Unit 2 (January 2019 - December 2019)

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

(2 Samples)

(1) Unit 1 (January 2019 - December 2019)

(2) Unit 2 (January 2019 - December 2019)

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

(1) Unit 1 (January 2019 - December 2019)

(2) Unit 2 (January 2019 - December 2019)

71152 - Problem Identification and Resolution

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 issue:

(1) The inspectors conducted a detailed review of a self-revealing issue identified in CR 1136938 that occurred on November 28, 2019. On that date, the licensee discovered that the steam piping leading to the safety-related, turbine-driven auxiliary feedwater pump had developed a leak. The piping was subsequently isolated to stop the leak, rendering the pump inoperable. Upon investigation, it was discovered that a portion of the insulated piping had undergone several wet/dry cycles externally throughout the lifetime of the piping. Because the insulation went through cycles of being wet and then dry again, it created an area that was highly susceptible to external pipe corrosion. Over time, this corrosion led to the pipe failure on November 28 and subsequent steam leak. The piping was replaced, tested, and the pump restored to operable on November 30, 2019. There are no American Society of Mechanical Engineers Boiler and Pressure Vessel Code (Code) requirements to remove insulation for inspection on this piping or to prevent the piping from being in such an environment.

Additionally, the inspectors noted that a similar event occurred on site in July 2010. Following the 2010 event, the licensee completed an extent of condition to identify other locations where this could occur. The screening criteria for that evaluation excluded locations which could be isolated. The piping involved in the 2019 event was one such screened-out location.

Because there are no explicit Code requirements to prevent wetted insulation, there are no performance deficiencies associated with this issue.

INSPECTION RESULTS

No findings were identified.

EXIT MEETINGS AND DEBRIEFS

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

• On April 7, 2020, the inspectors presented the integrated inspection results to Mr. L. Lane and other members of the licensee staff.

• On January 30, 2020, the inspectors presented the Licensed Operator Requalification Program inspection results to Mr. L. Hilbert and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.04 Drawings 11715-FM-074A Flow/Valve Operating Numbers Diagram Feedwater System 56

Sheet 1 North Anna Power Station Unit 1 Virginia Power

11715-FM-074A Flow/Valve Operating Numbers Diagram Feedwater System 48

Sheet 3 North Anna Power Station Unit 1 Virginia Power

11715-FM-078A Flow/Valve Operating Numbers Diagram Service Water 66

Sheet 1 System North Anna Power Station Units 1 & 2 Virginia

Power

11715-FM-078A Flow/Valve Operating Numbers Diagram Service Water 43

Sheet 2 System North Anna Power Station Units 1 & 2 Virginia

Power

11715-FM-078A Flow/Valve Operating Numbers Diagram Service Water 61

Sheet 3 System North Anna Power Station Units 1 & 2 Virginia

Power

11715-FM-091A Flow/Valve Operating Numbers Diagram Cont Quench & 47

Sheet 1 Recirc Spray Sub Sys North Anna Power Station Unit 1

Virginia Power

11715-FM-091A Flow/Valve Operating Numbers Diagram Cont Quench & 35

Sheet 4 Recirc Spray Sub Sys North Anna Power Station Unit 1

Virginia Power

11715-FM-091B Flow/Valve Operating Numbers Diagram Cont Quench & 15

Sheet 1 Recirc Spray Sub Sys North Anna Power Station Unit 1

Virginia Power

11715-FM-096A Flow/Valve Operating Numbers Diagram Safety Injection 44

Sheet 1 System North Anna Power Station Unit 1 Virginia Power

11715-FM-096A Flow/Valve Operating Numbers Diagram Safety Injection 43

Sheet 2 System North Anna Power Station Unit 1 Virginia Power

2050-FM-070A Flow/Valve Operating Numbers Diagram Main Steam 39

Sheet 3 System North Anna Power Station Unit 2 Virginia Power

2050-FM-070B Flow/Valve Operating Numbers Diagram Main Steam 42

Sheet 1 System North Anna Power Station Unit 2 Virginia Power

2050-FM-070B Flow/Valve Operating Numbers Diagram Main Steam 40

Sheet 2 System North Anna Power Station Unit 2 Virginia Power

Inspection Type Designation Description or Title Revision or

Procedure Date

2050-FM-070B Flow/Valve Operating Numbers Diagram Main Steam 42

Sheet 3 System North Anna Power Station Unit 2 Virginia Power

2050-FM-074A Flow/Valve Operating Numbers Diagram Feedwater System 54

Sheet 1 North Anna Power Station Unit 2 Virginia Power

2050-FM-074A Flow/Valve Operating Numbers Diagram Feedwater System 44

Sheet 3 North Anna Power Station Unit 2 Virginia Power

2050-FM-091A Flow/Valve Operating Numbers Diagram Cont Quench & 42

Sheet 1 Recirc Spray Sub Sys North Anna Power Station Unit 2

Virginia Power

2050-FM-091A Flow/Valve Operating Numbers Diagram Cont Quench & 32

Sheet 2 Recirc Spray Sub Sys North Anna Power Station Unit 2

Virginia Power

Procedures 0-OP-49.1A Valve Checkoff - Service Water 52

CM-AA-DWG-201 Station Drawing Process 5

71111.05 Corrective Action 1144424 Three Performance Deficiencies Identified During First 04/07/2020

Documents Quarter 2020 NRC Exit Meeting

Resulting from CR1139252

Inspection CR1140601 Fire Extinguisher AB-D-7A 02/03/2020

Fire Plans 1-FS-AF-1 Safe Shutdown Equipment Auxiliary Feedwater Pumphouse 3

2-FS-AF-1 Fire Fighting Strategy for Safe Shutdown Equipment for 2

Auxiliary Feedwater Pumphouse

2-FS-MS-1 Main Steam Valve House (All Elevations) 4

Procedures 1-FS-AB-1 Auxiliary Building (All Elevations) Fire Fighting Strategy Safe 7

Shutdown Equipment

1-FS-DR-1 Unit 1 and 2 Emergency Diesel Engine Rooms 6

CM-AA-FPA-101 Control of Combustible and Flammable Materials 11

71111.06 Corrective Action CR1117800

Documents

Procedures 0-AP-39.1 Turbine Building Flooding 11

0-AP-39.2 Auxiliary Building Flooding 13

71111.11B Corrective Action CR1140304 LORP Simulator Scenario did not meet TR-AA-730 01/29/2020

Documents Requirements.

Resulting from

Inspection

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.12 Corrective Action CA7625435

Documents CR1118448

CR1125111

CR1130234

CR1137065

CR1137785

CR1138495

CR1140236

Procedures 0-AP-36 Seismic Event 33

0-PT-39.1 Syscom Seismic Monitoring Channel Check 14

71111.13 Corrective Action CR1142400

Documents CR1143424

Corrective Action CR1143799

Documents

Resulting from

Inspection

Miscellaneous Medium Risk Plan for the 1-IA-C-1 01/28/2020

High Risk Plan Actions for the 2-CN-P-1B Condensate 01/21/2020

Pump Motor Lift

High Risk Plan Actions for the Repack of the 2-SD-P-1C 01/28/2020

while 2-CN-P-1B is out of Service

0-GOP-5.8 LCO Tracking Log

Procedures 1-MOP-49.01 1-SW-P-1A and Service Water Bay 20

OP-AA-600 Protected Equipment 4

Work Orders WO591022271193 Chain and Basket/Tray Replacement

71111.15 Corrective Action CR1136938

Documents CR1140904

Drawings 11715-FM-070A Main Steam System 46

Operability CA778768 Prior Operability of 1-FW-P-2 2

Evaluations

Procedures 1-LOG-14 Non-Routine Surveillance Log

1-PT-85 DC Distribution System 69

Inspection Type Designation Description or Title Revision or

Procedure Date

71111.18 Drawings 11715-FM-107B, Valve Operating Numbers and Flow Diagram for 1H- 8

SH-001 Emergency Diesel Fuel Oil System

Engineering NA-18-00096 Removal of 01-EL--34-Valve on 1H - Emergency Diesel 0

Changes Generator

Work Orders WO59203275667

71111.19 Corrective Action CR1139481

Documents

Procedures 1-OP-49.2 Service Water Traveling Water Screens and Wash Pumps 24

MRS-SSP-3515- Top Nozzle Fuel Reconstitution at North Anna 0

Work Orders 59103069678 PM to Clean Pump Lube Oil Filter and Speed Increaser 01/17/2020

Lube Oil Strainer

59103069684 Change Oil in Pump/Speed Increaser 01/17/2020

59103133819 Pump Alignment 01/17/2020

203290654 1J Diesel Generator Test (Start by ESF Actuation) 02/26/2020

71111.22 Work Orders 59203143074 Quench Spray System - "A" Subsystem Comprehensive 01/10/2020

Pump Test

203143530 1-FW-P-2, Turbine Driven Auxiliary Feedwater Pump, IST 02/27/2020

Comprehensive Pump Test, and Valve Testing

203284321 1H Emergency Diesel Generator Slow Start Test 01/08/2020

203294294 Quench Spray System - "A" Subsystem 01/10/2020

203294479 2-FW-P-3B Motor-Driven AFW Pump, and Valve Test 01/14/2020

203295648 Charging Pump 1-CH-P-1B 02/10/2020

203296415 1-FW-P-2, Turbine Driven Auxiliary Feedwater Pump and 02/27/2020

Valve Test

203299390 1H Emergency Diesel Generator Slow Start Test 01/09/2020

71152 Corrective Action CA 7784888

Documents CA7823706

CA7823706

Procedures 1-PT-301MS Terry Turbine Main Steam Supply and 1-FW-P-2 System 5

Pressure Test

Work Orders WO59103088221

13