Text

Integrated Inspection Report 05000395/2023001
	ML23132A206
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: ML23132A206 (1)
	v • d • e

SUBJECT:

VIRGIL C. SUMMER - INTEGRATED INSPECTION REPORT 05000395/2023001

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 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

Inspection Report

Docket Number:

05000395

License Number:

NPF-12

Report Number:

05000395/2023001

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

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.

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.

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

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:

(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)

(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 release 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)===

Main article: IP 71151

(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,

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 Robert Justice and other members of the licensee staff.

On March 9, 2023, the inspectors presented the Emergency Preparedness Exercise inspection results to Don Shue and other members of the licensee staff.

DOCUMENTS REVIEWED

Inspection

Procedure

Type

Designation

Description or Title

Revision or

Date

FP1SWPH-425

Service Water Pump House

71111.05

Drawings

FP1SWPH-436