ML23131A351
| ML23131A351 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 05/12/2023 |
| From: | David Dumbacher Division Reactor Projects II |
| To: | Stoddard D Dominion Energy Co |
| References | |
| IR 2023001 | |
| Download: ML23131A351 (10) | |
See also: IR 05000395/2023001
Text
Daniel G. Stoddard
Senior Vice President and Chief Nuclear Officer
Dominion Energy
Innsbrook Technical Center
5000 Dominion Blvd., Floor: IN-2SW
Glenn Allen, VA 23060
SUBJECT:
VIRGIL C. SUMMER - INTEGRATED INSPECTION REPORT
Dear Daniel G. Stoddard:
On March 31, 2023, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection
at Virgil C. Summer. On May 9, 2023, the NRC inspectors discussed the results of this
inspection with Mr. Robert Justice 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,
David E. Dumbacher, Chief
Reactor Projects Branch 3
Division of Reactor Projects
Docket No. 05000395
License No. NPF-12
Enclosure:
As stated
cc w/ encl: Distribution via LISTSERV
May 12, 2023
Signed by Dumbacher, David
on 05/12/23
X SUNSI Review
X
Non-Sensitive
Sensitive
X
Publicly Available
Non-Publicly Available
OFFICE
RII/DRP
RII/DRP
RII/DRP
RII/ DRP
RII/ DRP
RII/ DRP
NAME
S. Sandal
A. Hutto
J. Hamman S. Janicki
M. Read
N. Childs
DATE
05/10/23
05/10/23
05/10/23
05/10/23
05/10/23
05/11/23
OFFICE
RII/DRP
NAME
D. Dumbacher
DATE
05/12/23
Enclosure
U.S. NUCLEAR REGULATORY COMMISSION
Inspection Report
Docket Number:
05000395
License Number:
Report Number:
Enterprise Identifier:
I-2023-001-0048
Licensee:
Dominion Energy
Facility:
Virgil C. Summer
Location:
Jenkinsville, SC
Inspection Dates:
January 01, 2023 to March 31, 2023
Inspectors:
D. Bacon, Senior Operations Engineer
P. Gresh, Emergency Preparedness Inspector
J. Hamman, Senior Project Engineer
A. Hutto, Senior Project Engineer
S. Janicki, Acting Senior Resident Inspector
M. Norris, Senior Emergency Preparedness Specialist
M. Read, Senior Resident Inspector
S. Sandal, Senior Reactor Analyst
J. Walker, Senior Emergency Preparedness Inspector
Approved By:
David E. Dumbacher, Chief
Reactor Projects Branch 3
Division of Reactor Projects
2
SUMMARY
The U.S. Nuclear Regulatory Commission (NRC) continued monitoring the licensees
performance by conducting an integrated inspection at Virgil C. Summer, 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.
3
PLANT STATUS
The unit 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 activities described in IMC 2515,
Appendix D, Plant Status, observed risk-significant activities, and completed on-site portions of
IPs. 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.
REACTOR SAFETY
71111.01 - Adverse Weather Protection
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 from impending severe weather on January 5, 2023 (Tornado
Watch & Thunderstorm Warning).
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)
Residual heat removal system, on January 4, 2023
(2)
Emergency feedwater system, on January 17, 2023
(3)
Electro-hydraulic control system following oil addition, on February 9, 2023
(4)
Auxiliary building ventilation system, on February 24, 2023
(5)
Charging and high head safety injection system B, on March 21, 2023
(6)
Emergency diesel generator A protected train walkdown during emergent
maintenance for emergency diesel generator B, on March 30, 2023
Complete Walkdown Sample (IP Section 03.02) (1 Sample)
(1)
The inspectors evaluated system configurations during a complete walkdown of the
emergency diesel generator 'B' system during an extended maintenance outage on
January 23, 2023.
4
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (6 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)
Service water booster pump air handler rooms, on January 17, 2023
(2)
Intermediate building elevation, 412 feet on January 17, 2023
(3)
Diesel generator building, on January 23, 2023
(4)
Spent fuel pool area, on February 13, 2023
(5)
Intermediate building chiller rooms, on February 27, 2023
(6)
Service water pump house, on March 1, 2023
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 March 22, 2023.
71111.06 - Flood Protection Measures
Flooding Sample (IP Section 03.01) (1 Sample)
The inspectors evaluated internal flooding mitigation protections in the:
(1)
Intermediate building from the service water booster pumps, on January 9, 2023
71111.07A - Heat Exchanger/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 January 23, 2023
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)
The inspectors observed and evaluated licensed operator performance in the control room
during:
(1)
Main turbine valve testing on January 4, 2023, and solid-state protection system time
response testing on March 1, 2023
5
71111.12 - Maintenance Effectiveness
Maintenance Effectiveness (IP Section 03.01) (1 Sample)
The inspectors evaluated the effectiveness of maintenance to ensure the following
structures, systems, and components (SSCs) remain capable of performing their intended
function:
(1)
Reactor building purge exhaust radiation monitor (RM-A14) failures, review
completed on March 31, 2023
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)
Elevated risk during a tornado watch while performing a unit down power for turbine
driven emergency feedwater testing, on January 5, 2023
(2)
Elevated risk during planned turbine driven emergency feedwater pump maintenance,
on January 17, 2023
(3)
Yellow risk during planned solid state protection system testing, on January 20, 2023
(4)
Elevated risk during planned maintenance for emergency diesel generator B, on
January 27, 2023
(5)
Elevated risk due to planned main control board testing, on March 27, 2023
(6)
Elevated risk during corrective maintenance for Parr Hydro 13.8 kW alternate AC
power line, on March 29, 2023
(7)
Elevated risk during emergent emergency diesel generator maintenance, on March
30, 2023
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)
CR 1217542, Diesel fuel oil sample results above limits, on March 13, 2023
(2)
CR 1221620, XEG0001B-E (EDG 'B') fuel oil pipe fitting crack, on March 23, 2023
(3)
CR 1221899, XEG0001B-E (EDG B) fuel oil accumulator low level due to check
valve leak-by, on March 31, 2023
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 modifications:
6
(1)
ECR-71514, 'A' emergency diesel generator speed switch replacement, on
March 1, 2023
71111.24 - Testing and Maintenance of Equipment Important to Risk
The inspectors evaluated the following testing and maintenance activities to verify system
operability and/or functionality:
Post-Maintenance Testing (PMT) (IP Section 03.01) (3 Samples)
(1)
STP-220.002, turbine driven emergency feedwater pump testing following scheduled
maintenance, on January 17, 2023
(2)
STP-123.003A, service water valve testing following check valve maintenance, on
January 25, 2023
(3)
STP 205.003, charging and safety injection valve stroke timing, on March 21, 2023
Surveillance Testing (IP Section 03.01) (3 Samples)
(1)
STP-345.043, round trip delay time response testing for the solid-state protection
system, on March 1, 2023
(2)
Instrument air surveillance to place an additional air compressor in service to support
maintenance, on March 8, 2023
(3)
STP 302.041, uncompensated power range nuclear instrument detector current
testing, on March 16, 2023
Diverse and Flexible Coping Strategies (FLEX) Testing (IP Section 03.02) (1 Sample)
(1)
Flex 480/V generator, on February 10, 2023
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 6, 2023. The exercise scenario began with concurrent simulated loose parts
and high radiation monitor alarms. An Alert was declared when Chemistry provided a
reactor coolant system sample above the dose equivalent iodine threshold. A design
basis loss of coolant accident concurrent with reactor building radiation alarms
resulted in the declaration of a Site Area Emergency based on loss or potential loss
of two fission product barriers. Afterward, containment pressure increased above
threshold and the alpha service water booster pump trips. With the bravo reactor
building spray pump out of service, there was less than one full train of containment
depressurization equipment, therefore meeting the criteria to satisfy simulated
conditions for a General Emergency. This allowed the Offsite Response
Organizations to demonstrate their ability to implement emergency actions.
71114.04 - Emergency Action Level and Emergency Plan Changes
Inspection Review (IP Section 02.01-02.03) (1 Sample)
7
(1)
The inspectors evaluated submitted Emergency Action Level, Emergency Plan, and
Emergency Plan Implementing Procedure changes during the week of
March 6, 2023. This evaluation does not constitute NRC approval.
71114.06 - Drill Evaluation
Drill/Training Evolution Observation (IP Section 03.02) (1 Sample)
The inspectors evaluated:
(1)
A training drill involving the loss of one emergency electrical bus, a generator tube
rupture and fault, and a of radioactive materials on January 10, 2023.
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 (DEP) Sample (IP Section 02.12) (1 Sample)
(1)
January 1, 2022, through December 31, 2022
EP02: Emergency Response Organization (ERO) Drill Participation (IP Section 02.13)
(1 Sample)
(1)
January 1, 2022, through December 31, 2022
EP03: Alert and Notification System (ANS) Reliability Sample (IP Section 02.14) (1 Sample)
(1)
January 1, 2022, through December 31, 2022
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On May 9, 2023, the inspectors presented the integrated inspection results to Mr. Robert
Justice and other members of the licensee staff.
On March 9, 2023, the inspectors presented the Emergency Preparedness Exercise
inspection results to Mr. Don Shue and other members of the licensee staff.
8
DOCUMENTS REVIEWED
Inspection
Procedure
Type
Designation
Description or Title
Revision or
Date
FP1SWPH-425
Service Water Pump House
0
Drawings
FP1SWPH-436
Service Water Pump House
0
Work Orders
EDG B Fuel oil pipe fitting crack
STP-302.041
NIS Power Range N44 Operational Test
14
Procedures
STP-345.043
RTD Time Response Testing
9