IR 05000395/2022003
| ML22304A123 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 10/31/2022 |
| From: | David Dumbacher NRC/RGN-II/DRP/RPB3 |
| To: | Stoddard D Dominion Energy Co |
| References | |
| IR 2022003 | |
| Download: ML22304A123 (10) | |
Text
SUBJECT:
VIRGIL C. SUMMER - INTEGRATED INSPECTION REPORT 05000395/2022003
Dear Daniel G. Stoddard:
On September 30, 2022, the U.S. Nuclear Regulatory Commission (NRC) completed an inspection at Virgil C. Summer. On October 20, 2022, the NRC inspectors discussed the results of this inspection with Mr. George 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, 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:
Report Number:
Enterprise Identifier:
I-2022-003-0024
Licensee:
Dominion Energy
Facility:
Virgil C. Summer
Location:
Jenkinsville, SC
Inspection Dates:
July 01, 2022 to September 30, 2022
Inspectors:
P. Cooper, Senior Reactor Inspector
S. Janicki, Resident Inspector
M. Read, Sr. Resident Inspector
M. Schwieg, Senior Reactor Inspector
Approved By:
David E. Dumbacher, Chief
Reactor Projects Branch 3
Division of Reactor Projects
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.
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 DProperty "Inspection Manual Chapter" (as page type) with input value "NRC Inspection Manual 2515,</br></br>Appendix D" contains invalid characters or is incomplete and therefore can cause unexpected results during a query or annotation process., 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 from hurricane Ian on September
29, 2022
External Flooding Sample (IP Section 03.03) (1 Sample)
(1)
The inspectors evaluated that flood protection barriers, mitigation plans, procedures,
and equipment are consistent with the licensees design requirements and risk
analysis assumptions for coping with external flooding on September 29, 2022
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)
Motor driven emergency feedwater train 'B' protected train walkdown on August 2,
2022
(2)
'A' train of the residual heat removal system on June 27, 2022, while the 'B' residual
heat removal pump was inoperable for preventative maintenance
(3)
Electric-driven fire service pump and alternate diesel-driven fire service pump on
September 15, 2022, during maintenance on the diesel-driven fire service pump
(4)
Equipment Building and Alternate Equipment Building diesel generators on
September 19, 2022
71111.05 - Fire Protection
Fire Area Walkdown and Inspection Sample (IP Section 03.01) (4 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)
Charging pump rooms in the auxiliary building elevation 388 feet on August 30, 2022
(2)
Auxiliary building elevation 374 feet safety-related pumps on September 2, 2022
(3)
Transformer yard elevation 463 feet on September 7, 2022
(4)
'Equipment Building' and 'Alternate Equipment Building' diesel generator buildings on
September 19, 2022
71111.07SIX - Heat Exchanger/Sink Performance
Ultimate Heat Sink Containment Device and Dam (IP Section 03.05) (1 Sample)
The inspectors evaluated the ultimate heat sink performance containment device and dam
on the following:
(1)
Ultimate heat sink containment device and dam
71111.07T - Heat Exchanger/Sink Performance
Heat Exchanger (Service Water Cooled) (IP Section 03.02) (3 Samples)
The inspectors evaluated heat exchanger performance on the following:
(1)
B Diesel Generator Intercooler & Injector Cooling Water Heat Exchanger
(2)
B Diesel Generator Jacket Water Heat Exchanger
(3)
1A RB Cooling Unit
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)
Inspectors observed and evaluated licensed operator performance in the Control
Room during activities to secure pressurizer backup heaters using operators under-
instruction on August 22, first time online performance of feedwater booster pump
calibrations on September 6, and testing steam generator blowdown valves on
September 13, 2022.
Licensed Operator Requalification Training/Examinations (IP Section 03.02) (1 Sample)
(1)
Inspectors observed a licensed operator requalification simulator session involving a
loss of a reactor coolant pump without an automatic reactor trip, a small break loss of
coolant accident, and a loss of the emergency feedwater system on August 3, 2022
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 remain capable of performing their intended function:
(1)
Emergency diesel generators, review completed on September 26, 2022
(2)
Control of temporary systems and/or equipment on September 8, 2022
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 planned instrument air maintenance activities on July 13, 2022
(2)
Planned elevated risk during scheduled battery and battery charger surveillances and
unit auxiliary transformer XTF0002T maintenance on July 25, 2022
(3)
Elevated risk during planned solid state protection system maintenance during
switchyard thermography and isophase bus duct maintenance on September 2, 2022
(4)
Elevated risk during planned isophase bus duct inspections and switchyard crane
activities on September 9, 2022
(5)
Elevated risk during crane lifting activities near the refueling water storage tank on
August 23, 2022
71111.15 - Operability Determinations and Functionality Assessments
Operability Determination or Functionality Assessment (IP Section 03.01) (2 Samples)
The inspectors evaluated the licensee's justifications and actions associated with the
following operability determinations and functionality assessments:
(1)
CR1205773, feedwater isolation valve 'C' pilot valve pressure regulator, completed
review on September 9, 2022
(2)
CR1192017, alternate emergency building diesel generator failed to start, completed
review on September 19, 2022
71111.18 - Plant Modifications
Permanent Modifications (IP Section 03.02) (1 Sample)
The inspectors evaluated the following permanent modification:
(1)
ECR-50522, Replacement of transformer XTF-1, review completed on August 22,
2022
71111.19 - Post-Maintenance Testing
Post-Maintenance Test Sample (IP Section 03.01) (4 Samples)
The inspectors evaluated the following post-maintenance testing activities to verify system
operability and/or functionality:
(1)
STP-112.003, stroke testing for valve XVG-3003B, reactor building spray pump
header isolation valve, following motor repairs, on July 7, 2022
(2)
STP-223.002, 'B' service water train testing following planned maintenance, on July
28, 2022
(3)
SOP-306, 'A' emergency diesel generator testing following control room "KW" switch
replacement on August 17, 2022
(4)
SOP-118, 'B' component cooling water pump testing following outboard seal
replacement on August 22, 2022
71111.22 - Surveillance Testing
The inspectors evaluated the following surveillance testing activities to verify system operability
and/or functionality:
Surveillance Tests (other) (IP Section 03.01) (1 Sample)
(1)
Spent fuel pool crane and load cell in-service inspection on August 17, 2022
FLEX Testing (IP Section 03.02) (1 Sample)
(1)
480V (300 kW) FLEX diesel generator surveillance on September 9, 2022
71114.06 - Drill Evaluation
Select Emergency Preparedness Drills and/or Training for Observation (IP Section 03.01) (1
Sample)
(1)
On July 20, 2022, inspectors observed an emergency drill involving an Alert
declaration from a resin spill, Site Area Emergency from a loss of offsite power, and
then a General Emergency due to extended loss of offsite power
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 Sample)
(1)
Unit 1 July 1, 2021, through June 30, 2022
MS07: High Pressure Injection Systems (IP Section 02.06) (1 Sample)
(1)
Unit 1 July 1, 2021, through June 30, 2022
MS09: Residual Heat Removal Systems (IP Section 02.08) (1 Sample)
(1)
Unit 1 July 1, 2021, through June 30, 2022
71152A - Annual Follow-up Problem Identification and Resolution
Annual Follow-up of Selected Issues (Section 03.03) (2 Samples)
The inspectors reviewed the licensees implementation of its corrective action program
related to the following issues:
(1)
On April 14, 2022, the licensee identified that the auto-start setting for
XAC0014, diesel-driven air compressor, had reset to the 'Off' position in the
Intellisys controller following a grid perturbation. The inspectors reviewed
condition report CR1196185 and associated licensee evaluations. The auto-
start capability for the air compressor mitigates plant risk during a steam
generator tube rupture concurrent with a loss of offsite power. The licensee
identified that severe weather in the area several days prior was the likely
cause of the loss of power to the controller, which reset to factory default
settings. The inspectors reviewed documentation on the Intellisys controller
and determined that there is a history at V.C. Summer and other plants where
Intellisys controllers have lost power for long enough for factory default setting
to be restored. In the example on April 14, 2022, the licensee validated that
the controller would have started the compressor upon a loss of power by
opening the feeder breaker to the battery charger and control panel. As a
result of the successful test, the licensee demonstrated that the compressor
would have functioned during a loss of offsite power. The licensee
reprogrammed the site-specific settings and created a condition report to
enhance standard and abnormal operating procedures to ensure operators
could start the compressor following a loss of power to the controller. The
inspectors completed their review on September 20, 2022 and did not identify
any violations of regulatory requirements.
(2)
On August 23, 2022, while performing a protected area walkdown, the
residents noted lifting activities in progress near the Refueling Water Storage
Tank (RWST). The inspectors observed multiple lifts by a mobile crane which
appeared to have a load path that was within 15 feet of the RWST. The
inspectors noted that one of the lifts included a skid pan loaded with
equipment and debris. Inspectors questioned the "Low Risk" assessment and
compliance with licensee procedures GMP-100.026, "Crane Operations and
Rigging" revision 7, and MA-AA-101, "Lifting and Material Handling" revision
28. The licensee generated condition report CR1206274, evaluated the issue,
and identified enhancements to training and procedural guidance. During a
follow-up inspection, inspectors estimated the loaded skid pans weight was in
excess of 2,500 lbs. based on the skids nameplate weight of 2,250 lbs. and
the inventory of the skid pan. The inspectors determined the load path, which
was within 15 feet of the RWST, and weight met the licensees criteria for a
heavy lift, which would have required additional risk mitigating actions
including a formal risk evaluation, engineering review, and additional
oversight. The inspectors determined through interviews that the riggers in the
field qualitatively determined each lift did not meet the weight or proximity
criteria for a heavy lift, which allowed the lifting activities to be screened as
low risk and allowed the lift to proceed without notifying operations or
implementation of additional risk mitigating actions. In response to the
inspectors questions, the licensee weighed the skid pan and determined the
actual weight of the skid pan to be 1,610 lbs. compared to the 2,250 lbs.
identified on the skid pans nameplate. This additional margin resulted in the
loads total weight falling below the licensees heavy load criteria of 2,500
lbs. and in compliance with licensee procedures. Therefore, inspectors did not
identify a violation of regulatory requirements.
INSPECTION RESULTS
No findings were identified.
EXIT MEETINGS AND DEBRIEFS
The inspectors verified no proprietary information was retained or documented in this report.
On October 20, 2022, the inspectors presented the integrated inspection results to Mr.
George Lippard and other members of the licensee staff.
On July 14, 2022, the inspectors presented the Heat Sink Exit Meeting inspection results
to Mr. Lippard and other members of the licensee staff.
THIRD PARTY REVIEWS
Inspectors reviewed a World Association of Nuclear Operators (WANO) report that was issued
during the inspection period.