IR 05000395/2021001
| ML21132A168 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 05/12/2021 |
| From: | David Dumbacher Division Reactor Projects II |
| To: | Stoddard D Dominion Innsbrook Technical Center |
| References | |
| IR 2021001 | |
| Download: ML21132A168 (10) | |
Text
May 12, 2021
SUBJECT:
VIRGIL C. SUMMER NUCLEAR STATION - INTEGRATED INSPECTION REPORT 05000395/2021001
Dear Mr. Stoddard:
On March 31, 2021, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at the Virgil C. Summer Nuclear Station. On April 28, 2021, the NRC inspectors discussed the results of this inspection with Mr. G. Lippard 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/
David E. Dumbacher, Chief Reactor Projects Branch 3 Division of Reactor Projects Docket No. 05000395 License No. NPF-12
Enclosure:
As stated
Inspection Report
Docket Number: 05000395 License Number: NPF-12 Report Number: 05000395/2021001 Enterprise Identifier: I-2021-001-0080 Licensee: Dominion Energy Facility: Virgil C. Summer Nuclear Station Location: Jenkinsville, SC Inspection Dates: January 01, 2021 to March 31, 2021 Inspectors: C. Fontana, Emergency Preparedness Inspector E. Hilton, Resident Inspector M. Read, Senior Resident Inspector S. Sanchez, Senior Emergency Preparedness Inspector J. Walker, Emergency Response Inspector Approved By: David E. Dumbacher, Chief Reactor Projects 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 Virgil C. Summer Nuclear 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 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.
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 Disease 2019 (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; conducted plant status activities as described in IMC 2515, Appendix D, Plant Status; 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 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 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.
REACTOR SAFETY 71111.01 - Adverse Weather Protection Seasonal Extreme Weather Sample (IP Section 03.01) (1 Sample)
(1) On February 8 and 9, 2021, the inspectors evaluated readiness for seasonal extreme weather conditions prior to the onset of seasonal cold temperatures.
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) 'B' and 'C' service water pumps while 'A' service water pump was tagged out for diving inspections on January 7, 2021 (2) Boric acid transfer system on January 28, 2021 (3) 'A' and 'C' chillers and chilled water pumps during 'B' chiller replacement on March 10, 2021
(4) 'B' emergency diesel generator when the 'A' chilled water and 'A' emergency core cooling systems were inoperable on March 17, 2021 Complete Walkdown Sample (IP Section 03.02) (1 Sample)
(1) The inspectors evaluated system configurations during a complete walkdown of the emergency core cooling system during the week of March 22, 2021.
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) Chilled water pump rooms in the auxiliary building on January 4, 2021 (2) Auxiliary building chiller rooms while replacing the 'B' chiller on January 26, 2021 (3) Technical Support Center computer room on February 8, 2021 (4) Emergency diesel generator building on March 23, 2021 (5) Service water pump house on March 22, 2021 Fire Brigade Drill Performance Sample (IP Section 03.02) (1 Sample)
(1) The inspectors evaluated the onsite fire brigade training and performance during an announced fire drill on February 4, 2021 71111.07A - Heat Sink Performance Annual Review (IP Section 03.01) (1 Sample)
The inspectors evaluated readiness and performance of:
(1) 'A' emergency diesel generator heat exchangers on February 22 and 23, 2021 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 operations personnel isolating steam generator blowdown and performing operational testing of radiation monitors on February 2, 2021 Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
(1) The inspectors observed a simulator evaluation that included a stuck control rod, failed open steam generator power operated relief valve, and an anticipated transient without scram on January 19, 2021 71111.12 - Maintenance Effectiveness
Quality Control (IP Section 03.02) (1 Sample)
The inspectors evaluated the effectiveness of maintenance and quality control activities to ensure the following SSC remains capable of performing its intended function:
(1) Overhaul of the 'B' boric acid transfer pump discharge isolation valve on January 20, 2021 71111.13 - Maintenance Risk Assessments and Emergent Work Control Risk Assessment and Management Sample (IP Section 03.01) (5 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) Elevated risk during turbine driven emergency feedwater pump testing on January 12, 2021 (2) Elevated risk during scheduled maintenance and testing of the 'B' charging pump suction isolation and cross-connect valves on January 19, 2021 (3) Elevated risk during scheduled tagout of both boric acid transfer pumps on January 20, 2021 (4) Elevated risk during emergent work on the main control board after losing power to radiation monitors on January 26, 2021 (5) Elevated risk during replacement of the 'B' chiller on January 28, 2021 71111.15 - Operability Determinations and Functionality Assessments Operability Determination or Functionality Assessment (IP Section 03.01) (5 Samples)
The inspectors evaluated the licensee's justifications and actions associated with the following operability determinations and functionality assessments:
(1) CR-21-00081, Service water booster pump discharge relief valve test failure, on January 14, 2021 (2) 'A' and 'B' emergency diesel generator jacket water flanged connections susceptible to galvanic corrosion on January 27, 2021 (3) CR-21-00182, Entrapped air in residual heat removal system, on January 28, 2021 (4) CR-21-00317, 'D' incore instrumentation inoperable, on February 24, 2021 (5) CR-21-00465, 'A' emergency diesel generator lube oil filter pump degradation, on February 26, 2021 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) 'B' charging pump testing following preventative maintenance activities on the motor and suction header isolation valves on January 19, 2021 (2) 'B' component cooling water pump testing following pump and motor oil changes on February 17, 2021 (3) 'A' emergency diesel generator on February 24, 2021, following a major maintenance package (4) 'A' steam generator power operated relief valve testing following solenoid replacement and valve preventative maintenance on March 24, 2021 (5) 'B' charging pump suction header isolation valve after thermal overload replacement on March 31, 2021 71111.22 - Surveillance Testing The inspectors evaluated the following surveillance tests:
Surveillance Tests (other) (IP Section 03.01) (3 Samples)
(1) STP-125.002B, 'B' Emergency Diesel Generator Operability Test, on February 10, 2021 (2) STP-123.003B, Train 'B' Service Water System Valve Operability Test, on March 10, 2021 (3) STP-170.021, Fire Switch Functional Test for 'B' Diesel Generator, on March 15, 2021 Inservice Testing (IP Section 03.01) (1 Sample)
(1) STP-220.002, Turbine Driven Emergency Feedwater Pump and Valve Test, on January 12, 2021 FLEX Testing (IP Section 03.02) (1 Sample)
(1) ERMP-100.011, FLEX 1MW Combustion Turbine Generator Preventative Maintenance, on March 25, 2021 71114.01 - Exercise Evaluation Inspection Review (IP Section 02.01-02.11) (1 Sample)
(1) The inspectors evaluated the biennial emergency plan exercise during the week of March 1, 2021. The simulated scenario began with a tornado strike that knocked over a large crane and damaged the protected area fence, thus meeting the conditions for declaration of an Unusual Event. Electrical grid disturbances and loss of balance-of-plant electrical loads resulted in an automatic reactor shutdown, followed shortly by an emergency diesel generator (EDG) failure to start. Prior to 15 minutes expiring with only one emergency electrical bus being powered, the conditions were met for declaring a Site Area Emergency. Once the other EDG was repaired and restarted, power was restored to the second vital bus and no further emergency declarations were necessary. The scenario did not include progression to a General Emergency, however the offsite response organizations practiced and demonstrated capabilities in their emergency facilities and were evaluated by FEMA.
71114.04 - Emergency Action Level and Emergency Plan Changes Inspection Review (IP Section 02.01-02.03) (1 Sample)
(1) The inspectors evaluated submitted Emergency Action Level, Emergency Plan, and Emergency Plan Implementing Procedure changes during the week of March 1, 2021. This evaluation does not constitute NRC approval.
71114.06 - Drill Evaluation Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1 Sample)
(1) The inspectors evaluated the conduct of a routine exercise including fuel damage, a ruptured steam generator that faulted outside of containment, and a radioactive release that resulted in a General Emergency on January 13, 2021.
71114.08 - Exercise Evaluation Scenario Review Inspection Review (IP Section 02.01 - 02.04) (1 Sample)
(1) The inspectors reviewed and evaluated in-office, the proposed scenario for the biennial emergency plan exercise at least 30 days prior to the day of the exercise.
OTHER ACTIVITIES - BASELINE 71151 - Performance Indicator Verification The inspectors verified licensee performance indicators submittals listed below:
EP01: Drill/Exercise Performance (IP Section 03.12) (1 Sample)
(1) April 1, 2020, through December 31, 2020 EP02: ERO Drill Participation (IP Section 03.13) (1 Sample)
(1) April 1, 2020, through December 31, 2020 EP03: Alert & Notification System Reliability (IP Section 03.14) (1 Sample)
(1) April 1, 2020, through December 31, 2020 71152 - Problem Identification and Resolution Semiannual Trend Review (IP Section 02.02) (1 Sample)
(1) The inspectors reviewed the licensee's corrective action program for trends that might be indicative of a more significant safety issue in the reactor coolant system leak rate testing program. The inspection focused on increased data uncertainty and a change in testing strategy due to a degraded reactor coolant pump seal.
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 28, 2021, the inspectors presented the integrated inspection results to Mr. G.
Lippard and other members of the licensee staff.
- On March 4, 2021, the inspectors presented the Emergency Preparedness Exercise Inspection results to Mr. G. Lippard and other members of the licensee staff.
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