IR 05000338/2020001
| 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:
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
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.
REACTOR SAFETY
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
Procedure
Type
Designation
Description or Title
Revision or
Date
Drawings
11715-FM-074A
Sheet 1
Flow/Valve Operating Numbers Diagram Feedwater System
North Anna Power Station Unit 1 Virginia Power
11715-FM-074A
Sheet 3
Flow/Valve Operating Numbers Diagram Feedwater System
North Anna Power Station Unit 1 Virginia Power
11715-FM-078A
Sheet 1
Flow/Valve Operating Numbers Diagram Service Water
System North Anna Power Station Units 1 & 2 Virginia
Power
11715-FM-078A
Sheet 2
Flow/Valve Operating Numbers Diagram Service Water
System North Anna Power Station Units 1 & 2 Virginia
Power
11715-FM-078A
Sheet 3
Flow/Valve Operating Numbers Diagram Service Water
System North Anna Power Station Units 1 & 2 Virginia
Power
11715-FM-091A
Sheet 1
Flow/Valve Operating Numbers Diagram Cont Quench &
Recirc Spray Sub Sys North Anna Power Station Unit 1
Virginia Power
11715-FM-091A
Sheet 4
Flow/Valve Operating Numbers Diagram Cont Quench &
Recirc Spray Sub Sys North Anna Power Station Unit 1
Virginia Power
11715-FM-091B
Sheet 1
Flow/Valve Operating Numbers Diagram Cont Quench &
Recirc Spray Sub Sys North Anna Power Station Unit 1
Virginia Power
11715-FM-096A
Sheet 1
Flow/Valve Operating Numbers Diagram Safety Injection
System North Anna Power Station Unit 1 Virginia Power
11715-FM-096A
Sheet 2
Flow/Valve Operating Numbers Diagram Safety Injection
System North Anna Power Station Unit 1 Virginia Power
2050-FM-070A
Sheet 3
Flow/Valve Operating Numbers Diagram Main Steam
System North Anna Power Station Unit 2 Virginia Power
2050-FM-070B
Sheet 1
Flow/Valve Operating Numbers Diagram Main Steam
System North Anna Power Station Unit 2 Virginia Power
2050-FM-070B
Sheet 2
Flow/Valve Operating Numbers Diagram Main Steam
System North Anna Power Station Unit 2 Virginia Power
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
2050-FM-070B
Sheet 3
Flow/Valve Operating Numbers Diagram Main Steam
System North Anna Power Station Unit 2 Virginia Power
2050-FM-074A
Sheet 1
Flow/Valve Operating Numbers Diagram Feedwater System
North Anna Power Station Unit 2 Virginia Power
2050-FM-074A
Sheet 3
Flow/Valve Operating Numbers Diagram Feedwater System
North Anna Power Station Unit 2 Virginia Power
2050-FM-091A
Sheet 1
Flow/Valve Operating Numbers Diagram Cont Quench &
Recirc Spray Sub Sys North Anna Power Station Unit 2
Virginia Power
2050-FM-091A
Sheet 2
Flow/Valve Operating Numbers Diagram Cont Quench &
Recirc Spray Sub Sys North Anna Power Station Unit 2
Virginia Power
Procedures
0-OP-49.1A
Valve Checkoff - Service Water
CM-AA-DWG-201
Station Drawing Process
Corrective Action
Documents
Resulting from
Inspection
1144424
Three Performance Deficiencies Identified During First
Quarter 2020 NRC Exit Meeting
04/07/2020
CR1139252
CR1140601
Fire Extinguisher AB-D-7A
2/03/2020
Fire Plans
1-FS-AF-1
Safe Shutdown Equipment Auxiliary Feedwater Pumphouse
2-FS-AF-1
Fire Fighting Strategy for Safe Shutdown Equipment for
Auxiliary Feedwater Pumphouse
2-FS-MS-1
Main Steam Valve House (All Elevations)
Procedures
1-FS-AB-1
Auxiliary Building (All Elevations) Fire Fighting Strategy Safe
Shutdown Equipment
1-FS-DR-1
Unit 1 and 2 Emergency Diesel Engine Rooms
CM-AA-FPA-101
Control of Combustible and Flammable Materials
Corrective Action
Documents
CR1117800
Procedures
0-AP-39.1
Turbine Building Flooding
0-AP-39.2
Auxiliary Building Flooding
71111.11B Corrective Action
Documents
Resulting from
Inspection
CR1140304
LORP Simulator Scenario did not meet TR-AA-730
Requirements.
01/29/2020
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Corrective Action
Documents
CA7625435
CR1118448
CR1125111
CR1130234
CR1137065
CR1137785
CR1138495
CR1140236
Procedures
0-AP-36
Seismic Event
0-PT-39.1
Syscom Seismic Monitoring Channel Check
Corrective Action
Documents
CR1142400
CR1143424
Corrective Action
Documents
Resulting from
Inspection
CR1143799
Miscellaneous
Medium Risk Plan for the 1-IA-C-1
01/28/2020
High Risk Plan Actions for the 2-CN-P-1B Condensate
Pump Motor Lift
01/21/2020
High Risk Plan Actions for the Repack of the 2-SD-P-1C
while 2-CN-P-1B is out of Service
01/28/2020
0-GOP-5.8
LCO Tracking Log
Procedures
1-MOP-49.01
1-SW-P-1A and Service Water Bay
Protected Equipment
Work Orders
WO591022271193 Chain and Basket/Tray Replacement
Corrective Action
Documents
CR1136938
CR1140904
Drawings
11715-FM-070A
Main Steam System
Operability
Evaluations
CA778768
Prior Operability of 1-FW-P-2
Procedures
1-LOG-14
Non-Routine Surveillance Log
1-PT-85
DC Distribution System
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
Drawings
11715-FM-107B,
SH-001
Valve Operating Numbers and Flow Diagram for 1H-
Emergency Diesel Fuel Oil System
Engineering
Changes
NA-18-00096
Removal of 01-EL--34-Valve on 1H - Emergency Diesel
Generator
Work Orders
Corrective Action
Documents
CR1139481
Procedures
1-OP-49.2
Service Water Traveling Water Screens and Wash Pumps
MRS-SSP-3515-
Top Nozzle Fuel Reconstitution at North Anna
Work Orders
59103069678
PM to Clean Pump Lube Oil Filter and Speed Increaser
Lube Oil Strainer
01/17/2020
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)
2/26/2020
Work Orders
203143074
Quench Spray System - "A" Subsystem Comprehensive
Pump Test
01/10/2020
203143530
1-FW-P-2, Turbine Driven Auxiliary Feedwater Pump, IST
Comprehensive Pump Test, and Valve Testing
2/27/2020
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
2/10/2020
203296415
1-FW-P-2, Turbine Driven Auxiliary Feedwater Pump and
Valve Test
2/27/2020
203299390
1H Emergency Diesel Generator Slow Start Test
01/09/2020
Corrective Action
Documents
CA 7784888
CA7823706
CA7823706
Procedures
1-PT-301MS
Terry Turbine Main Steam Supply and 1-FW-P-2 System
Pressure Test
Work Orders