ML22090A240

Annual Operating Report

ML22090A240
Person / Time
Site:	Summer
Issue date:	03/31/2022
From:	Lippard G Dominion Energy South Carolina
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
22-091
Download: ML22090A240 (6)

Text

V.C. Summer Nuclear Station ij; Dominion Bradham Blvd & Hwy 215, J enkinsv ille, SC 29065 Mai ling Address: :;iiiiii" Energy P.O. Box 88, Jenkinsvi lle, SC 29065 Dominion Energy.com March 31, 2022

ATTN: Document Control Desk Serial No.22-091 US Nuclear Regulatory Commission LIC/TS/R0 Washington, D.C. 20555-001 Docket No. 50-395 License No. NPF-12

DOMINION ENERGY SOUTH CAROLINA, INC.

VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 DOCKET NO. 50-395 OPERA TING LICENSE NO. NPF-12 ANNUAL OPERATING REPORT

Enclosed is the 2021 Annual Operating Report for the Dominion Energy South Carolina, Inc. Virgil C. Summer Nuclear Station Unit No. 1. This report is being submitted in accordance with Technical Specification 6.9. 1.4.

If there are any questions, please call Tracey Stewart at (803) 931-5663.

Sincerely, 6Li~

Site Vice President V. C. Summer Nuclear Station

w/o enclosure unless noted

cc: G. J. Lindamood - Santee Cooper L. Dudes - NRC G. Miller - NRC PM M. L. Thomas - NRC NRC Resident Inspector Marsh USA, Inc.

ANI REIRS Project Manager VIRGIL C. SUMMER NUCLEAR STATION UNIT 1

2021 ANNUAL OPERATING REPORT Serial No.22-091 Docket No. 50-395 VCSNS Annual Operating Report Page 1 of 4

PREFACE

The 2021 Annual Operating Report for the Virgil C. Summer Nuclear Station Unit 1 is hereby submitted in accordance with Technical Specification 6.9.1.4 under Docket Number 50-395 and Facility Operating License NPF-12.

Serial No.22-091 Docket No. 50-395 VCSNS Annual Operating Report Page 2 of 4

TABLE OF CONTENTS

SECTION TITLE PAGE

1.0 Introduction 3

2.0 Operational Data 3

3.0 Operating Summary 3

4.0 Failed Fuel 4 Serial No.22-091 Docket No. 50-395 VCSNS Annual Operating Report Page 3 of 4

1.0 INTRODUCTION

The Virgil C. Summer Nuclear Station (VCSNS) utilizes a pressurized water reactor rated at 2900 MWT. The maximum dependable capacity is 966 MWe.

The station is located approximately 26 miles northwest of Columbia, South Carolina.

2.0 OPERATIONAL DATA

For the reporting period of January 1 through December 31, 2021, the station operated at a capacity factor of 82.7% (using maximum dependable capacity) and a unit availability of 82.5%. The reactor was critical for a total of 7270.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />, the generator remained on line 7223.9 hours1.041667e-4 days <br />0.0025 hours <br />1.488095e-5 weeks <br />3.4245e-6 months <br /> and the total gross electrical energy generated for 2021 was 7,281,012 MWH.

3.0 OPERA TING

SUMMARY

VCSNS Unit No.1 operated at 100% power from January 151through April 5th. On April 5th at 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> power was reduced to 90% to support Main Turbine Valve Testing. Reactor power was restored to 100% on April 5th at 1622 hours0.0188 days <br />0.451 hours <br />0.00268 weeks <br />6.17171e-4 months <br />.

VCSNS Unit No. 1 operated at 100% power from April 5th to May 12th. On May 12th at 1837 hours0.0213 days <br />0.51 hours <br />0.00304 weeks <br />6.989785e-4 months <br /> the plant was shut down to replace the valve air operator on the 'B' Main Feedwater Isolation Valve. The main generator breaker was closed on May 15th at 0329 hours0.00381 days <br />0.0914 hours <br />5.439815e-4 weeks <br />1.251845e-4 months <br />. Reactor power was restored to 100% on May 17th.

VCSNS Unit No. 1 operated at 100% power from May 17th to October 8th. On October 8th the plant was shut down to begin Refueling Outage Twenty-Six (RF-26).

The main generator breaker was opened on October 8th at 2348 hours0.0272 days <br />0.652 hours <br />0.00388 weeks <br />8.93414e-4 months <br />. The outage was completed on November 14th at 1141 hours0.0132 days <br />0.317 hours <br />0.00189 weeks <br />4.341505e-4 months <br /> when the main generator breaker was closed. A fault occurred on the main transformer on November 15th at 1728 hours0.02 days <br />0.48 hours <br />0.00286 weeks <br />6.57504e-4 months <br />. The plant was shutdown to replace the main transformer with spare transformer. The main generator breaker was closed on December 10th at 1948 hours0.0225 days <br />0.541 hours <br />0.00322 weeks <br />7.41214e-4 months <br />.

The unit remained at 100% power for the remainder of 2021.

Serial No.22-091 Docket No. 50-395 VCSNS Annual Operating Report Page 4 of 4

Forced Power Reduction > 20% Exceeding 4 Hours

On May 12th the plant was shut down at 1837 hours0.0213 days <br />0.51 hours <br />0.00304 weeks <br />6.989785e-4 months <br /> to remove and replace a failed valve air operator on the Bravo Loop Main Feedwater Isolation Valve. The shutdown ended on May 15th at 0329 hours0.00381 days <br />0.0914 hours <br />5.439815e-4 weeks <br />1.251845e-4 months <br />. The reactor was restored to 100%

power on May 17th. The total outage duration was 56.86 hours9.953704e-4 days <br />0.0239 hours <br />1.421958e-4 weeks <br />3.2723e-5 months <br />.

On November 15th the plant was shut down to replace the main transformer with spare transformer due to a fault on the main transformer. The shutdown ended on December 10th. The reactor was restored to 100% power on December 18th. The total outage duration was 602.34 hours3.935185e-4 days <br />0.00944 hours <br />5.621693e-5 weeks <br />1.2937e-5 months <br />.

4.0 FAILED FUEL

VCSNS did not have any indications of failed fuel in 2021.