ML15092A162

Annual Operating Report

ML15092A162
Person / Time
Site:	Summer
Issue date:	03/26/2015
From:	Gatlin T South Carolina Electric & Gas Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML15092A162 (7)

Text

Thomas D. Gatlin Vice President,Nuclear Operations 803.345.4342 A SCANA COMPANY March 26, 2015 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 DOCKET NO. 50-395 OPERATING LICENSE NO. NPF-12 ANNUAL OPERATING REPORT Enclosed is the 2014 Annual Operating Report for the South Carolina Electric & Gas Company 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 at your convenience.

Very truly yours, Thomas D. Gatlin SBR/TDG/rp Attachment c: K. B. Marsh K. M. Sutton S. A. Byrne J. C. Mellette J. B. Archie C. Logan (ANI)

N. S. Cams Marsh USA, Inc.

J. H. Hamilton NRC Resident Inspector J. W. Williams NSRC W. M. Cherry RTS (LTD 292)

V. M. McCree File (818.02-10, RR 8225)

S. A. Williams PRSF (RC-15-0051)

M. L. Thomas A

SCE&G I Virgil C.Summer Nuclear Station P.O.Box 88 . Jenkinsville, South Carolina 29065 .T (803) 345.5209

• www.scano.om

VIRGIL C. SUMMER NUCLEAR STATION UNIT 1 2014 ANNUAL OPERATING REPORT

Document Control Desk LTD 292 RC-1 5-0051 Page 2 of 6 PREFACE The 2014 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.

Document Control Desk LTD 292 RC-1 5-0051 Page 3 of 6 TABLE OF CONTENTS SECTION TITLE PAGE 1.0 Introduction 4 2.0 Operational Data 4 3.0 Operating Summary 4 4.0 Failed Fuel 6

Document Control Desk LTD 292 RC-1 5-0051 Page 4 of 6

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, 2014, the station operated at a capacity factor of 81.7% (using maximum dependable capacity) and a unit availability of 80.8%.

The reactor was critical for a total of 8519 hours0.0986 days <br />2.366 hours <br />0.0141 weeks <br />0.00324 months <br />, the generator remained on line 7234.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> and the total gross electrical energy generated for 2014 was 7,188,860 MWH.

3.0 OPERATING

SUMMARY

The Virgil C. Summer Nuclear Station (VCSNS) Unit No.1 operated at 100% power from January 1 st through January 17 th. On January 1 7 th power was reduced to 90% to support main turbine control valve testing. Power was restored to 100% on January 18th.

VCSNS operated at 100% power from January 1 8 th to March 3 1 st. On March 3 1 st power was reduced to approximately 85% to support main steam safety valve testing. The main generator breaker was opened on April 5 th to begin Refueling Outage Twenty-One (RF-21). The outage duration was originally planned through May 3 0 th, however reactor vessel head repair resulted in a planned 1.5 day extension. The unit remained shut down for the refueling outage until May 3 0 th when the reactor was returned to criticality and synchronized to the grid on May 3 1st.

Reactor power was restored to 100% on June 3 rd.

VCSNS operated at 100% power from June 3 rd to July 13 th. On July 13 th the plant was shut down to repair the Reactor Vessel Head Vent Valve. The repairs were completed and the main generator breaker was closed on July 2 1 st. During plant startup and escalation in power, a Steam Generator Lo-Lo Level Reactor Scram occurred at 47% reactor power due to the failure of the Condensate Polisher Bypass Valve. Repairs were made and the reactor was taken critical on July 2 3 rd and the main generator breaker was closed on July 27th. Reactor power was restored to 100% on July 29 .

VCSNS operated at 100% power from July 2 9 th to October 1 0 th. On October 1 0 th power was reduced to approximately 90% to support main turbine control valve testing. Power was restored to 100% on October 1 1 th.

VCSNS operated at 100% power from October 1 1 th to November 2 3 rd. On November 2 3 rd power was reduced to approximately 99.6% due to the extraction steam to the dearerator relief valve that lifted unexpectedly. The valve was gagged and reactor power was restored to 100% on November 2 4 th

Document Control Desk LTD 292 RC-15-0051 Page 5 of 6 VCSNS operated at 100% power from November 2 4 th to December 2 7 th. On December 2 7 th power was reduced to approximately 95.6% due to the failure of the digital level controller for the

1. 2 high pressure feedwater heater level control valve. The valve was repaired and reactor power was restored to 100% on December 2 8 th. The plantoperated at 100% power for the remainder of 2014.

Refueling Outage 21 Summary The main generator breaker was opened at 0001 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> on April 5th for Refueling Outage 21.

The outage duration was originally planned through May 30 , however reactor vessel head repair resulted in a 1.5 day outage extension.

Major work included:

0 NFPA 805 115 kV 1DA1 DB/1 DX cable route 0 NFPA 805 Disconnect Switch 0 NFPA 805 Circuit Protection

• NFPA 805 Emergency Communication Upgrade

• Reactor Building Safety Upgrades

• Power Range Meter Replacement

• Moduflash

• Hazard Mitigation for Independent Spent Fuel Storage Installation (Hydrogen Tie-In)

• Generator Exciter Rectifier

• Reactor Vessel Head Penetration repair Refueling Outage 21 duration was 56.5 days. Outage business plan duration was 55 days.

Personnel exposure in 2014 due to the outage was approximately 132.6 Rem, based on electronic dosimeters.

Power Reduction >20% Exceeding 4 Hours On July 13 th the plant was shut down to repair the Reactor Vessel Head Vent Valve. The repairs were completed and the main generator breaker was closed on July 2 1 st. During plant startup and escalation in power, a Steam Generator Lo-Lo Level Reactor Scram occurred at 47%

reactor power due to the failure of the Condensate Polisher Bypass Valve. Repairs were made

Document Control Desk LTD 292 RC-15-0051 Page 6 of 6 and the reactor was taken critical on July 2 3 rd and the main generator breaker was closed on July 2 7 th. Reactor power was restored to 100% on July 2 9th.

This outage did not result in any single release of radioactivity or single radiation exposure that accounted for more than 10% of the allowable annual values. The total outage duration was 306.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

4.0 FAILED FUEL VCSNS did not have any indications of failed fuel in 2014.