ML070860335

Annual Operating Report for 2006

ML070860335
Person / Time
Site:	Summer
Issue date:	03/23/2007
From:	Archie J South Carolina Electric & Gas Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML070860335 (9)

Text

A SCANA COMPANY Jeffrey B. Archie Vice President, Nuclear Operations 803.345.4214 March 23, 2007 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Subject:

VIRGIL C. SUMMER NUCLEAR STATION DOCKET NO. 50-395 OPERATING LICENSE NO. NPF-12 ANNUAL OPERATING REPORT Enclosed is the 2006 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 Specifications 6.9.1.4 and Regulatory Guide 1.16.

If there are any questions, please call at your convenience.

Very truly yours,

/e /y B.Archi SBR/JBA/cm Attachment c:

K. B. Marsh S. A. Byrne

4. H. Hamilton R. J. White W D. Travers R. E. Martin REIRS Project Manager M. L. Thomas K. M. Sutton D. L. Abstance W. G. Wendland J&H Marsh & McLennan NRC Resident Inspector NSRC CER (L-99-0107)

File (818.02-10, RR 8225)

PRSF (RC-07-0040)

SCE&G I Virgil C. Summer Nuclear Station

• P. 0. Box 88 ° Jenkinsville, South Carolina 29065 ° T (803) 345.5209

• www.sceg.com

VIRGIL C. SUMMER NUCLEAR STATION 2006 ANNUAL OPERATING REPORT

Document Control Desk L-99-0107 RC-07-0040 Page 2 of 8 PREFACE The 2006 Annual Operating Report for the Virgil C. Summer Nuclear Station is hereby submitted in accordance with Technical Specifications 6.9.1.4 and Regulatory Guide 1.16 under Docket Number 50/395 and Facility Operating License NPF-12.

Document Control Desk L-99-0107 RC-07-0040 Page 3 of 8 TABLE OF CONTENTS SECTION 1.0 2.0 3.0 4.0 5.0 TITLE Introduction Operational Data Operating Summary Exposures Failed Fuel PAGE 4

4 4

5 6

ATTACHMENTS 1.

2006 Man-Rem Report

Document Control Desk L-99-0107 RC-07-0040 Page 4 of 8 ANNUAL OPERATING REPORT

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, 2006, the station operated at a capacity factor of 88.9 % (using maximum dependable capacity) and a unit availability of 88.9 %. The reactor was critical for a total of 7847.0 hours0 days <br />0 hours <br />0 weeks <br />0 months <br />, the generator remained on line 7783.9 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 2006 was 7,820,340 MWH.

3.0 OPERATING

SUMMARY

The Virgil C. Summer Nuclear Station (VCSNS) Unit No.1 operated at 1 stMayth th 100% power from January 1st, through May 26. On May 26, power was reduced to 75% to repair a leak in the "C" Feedwater Booster Pump (FWBP) inboard seal. Reactor power was restored to 100% at 1615 hours0.0187 days <br />0.449 hours <br />0.00267 weeks <br />6.145075e-4 months <br /> on May 29th.

VCSNS operated at 100% power from May 2 9 th to October 1 1 th. As part of a pre-planned power reduction in preparation for Refueling Outage Sixteen (16), power was reduced to 80% on October 11 th.

The refueling outage began with the opening of the Main Generator breaker at 0012 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> on October 14 th. The plant remained shutdown for the refueling outage until November 2 2nd when the Main Generator breaker was closed. The turbine was taken off line from November 24th to November 2 5 th to perform balancing on the Turbine Generator due to elevated turbine vibration.

Reactor power was restored to 100% at 1900 hours0.022 days <br />0.528 hours <br />0.00314 weeks <br />7.2295e-4 months <br /> on November 28th.

The plant operated at 100% power for the remainder of 2006.

Document Control Desk L-99-01 07 RC-07-0040 Page 5 of 8 Refueling Outage 16 Summary The Main Generator breaker was opened at 0012 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> on October 1 4 th for Refueling Outage 16.

Major work included:

" Reactor Vessel Volumetric Head Inspection

" Installation of Reactor Vessel Hydra Nuts Turbine Low Pressure Rotor "A" Inspection

" Condenser Bellows Replacement Reactor Building Tendon/IWE/IWL Inspections "A" Reactor Coolant Pump Seal Inspection

" Reconfigure Reactor Building Residual Heat Removal and Spray Sumps Installation of Alternate Power Source to 1 DX Refueling Outage 16 duration was 39.7 days. Outage planned duration was 37 days.

Personnel exposure in 2006 due to the outage was approximately 64.1 rem based on electronic dosimeters.

Forced Power Reduction >20% Exceeding 4 Hours On May 2 6 th reactor power was reduced to approximately 75% to repair a leak on the "C" Feedwater Booster Pump inboard seal. 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 duration of the down power was approximately 69.1 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />.

4.0 EXPOSURES Attachment I lists the number of station, utility, and other personnel (including contract personnel) receiving exposures greater than 100 mrem/year and their associated man-rem exposure according to work and job function.

The exposures reported are estimated doses based on electronic dosimeters.

Document Control Desk L-99-0107 RC-07-0040 Page 6 of 8 5.0 FAILED FUEL VCSNS did have indications of failed fuel in 2006.

The reactor coolant system specific activity did not exceed the 1.0 microcuries per gram dose equivalent iodine-131 specific activity or the 100/E microcuries per gram limits of Technical Specification 3.4.8, for this reporting period. VCSNS imposed an administrative limit for reactor coolant system specific activity of 0.059 microcuries per gram dose equivalent iodine-1 31. This limit was not exceeded during 2006.

Document Control Desk L-99-0107 RC-07-0040 Page 7 of 8 ATTACHMENT I TO 2006 ANNUAL REPORT

Document Control Desk L-99-0107 RC-07-0040 Page 8 of 8 SOUTH CAROLINA ELECTRIC AND GAS CO.

V.C.

SUMMER NUCLEAR STATION PEOPLE COMPUTERIZED EXPOSURE NUCLEAR TRACKING SYSTEM PAGE 1

CNTRPTPERGII6R 31-JAN-2007 07:26 PERSONNEL AND MAN-REM BY WORK AND DUTY FUNCTION FINAL END OF YEAR REPORT FOR 2006 NUMBER OF PERSONNEL OVE STATION UTILITY WORKERS WORKERS R 100mREM TOTAL MAN-REM CONTRACT STATION UTILITY CONTRACT WORKERS WORKERS WORKERS WORKERS WORK AND JOB FUNCTION ROUTINE MAINTENANCE MAINTENANCE PERSONNEL OPERATIONS PERSONNEL HEALTH PHYSICS PERSONNEL SUPERVISORY PERSONNEL ENGINEERING PERSONNEL SPECIAL MAINTENANCE MAINTENANCE PERSONNEL OPERATIONS PERSONNEL HEALTH PHYSICS PERSONNEL SUPERVISORY PERSONNEL ENGINEERING PERSONNEL 11 2

6 0

2 3

2 0

0 0

REACTOR OPERATIONS & SURVEILLANCE MAINTENANCE PERSONNEL 1

OPERATIONS PERSONNEL 0

HEALTH PHYSICS PERSONNEL 1

SUPERVISORY PERSONNEL 0

ENGINEERING PERSONNEL 0

WASTE PROCESSING MAINTENANCE PERSONNEL OPERATIONS PERSONNEL HEALTH PHYSICS PERSONNEL SUPERVISORY PERSONNEL ENGINEERING PERSONNEL IN-SERVICE INSPECTION MAINTENANCE PERSONNEL OPERATIONS PERSONNEL HEALTH PHYSICS PERSONNEL SUPERVISORY PERSONNEL ENGINEERING PERSONNEL REFUELING MAINTENANCE PERSONNEL OPERATIONS PERSONNEL HEALTH PHYSICS PERSONNEL SUPERVISORY PERSONNEL ENGINEERING PERSONNEL TOTALS MAINTENANCE PERSONNEL OPERATIONS PERSONNEL HEALTH PHYSICS PERSONNEL SUPERVISORY PERSONNEL ENGINEERING PERSONNEL GRAND TOTAL END OF REPORT 0

0 1

0 0

1 2

1 0

0 2

0 0

0 0

18 6

9 0

2 85 2

7 0

1 31 1

0 0

6 0

0 0

0 0

0 0

0 0

23 0

1 0

3 29 0

3 0

1 146 3

12 0

5 5.355 1.251 2.789 0.158 0.841 1.464 0.536 0.139 0.096 0.036 0.905 0.826 0.515 0.038 0.036 0.018 0.000 0.387 0.019 0.000 0.491 0.539 0.242 0.012 0.027 0.877 0.363 0.046 0.051 0.115 9.110 3.515 4.118 0.374 1.055 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 27.544

0. 651 1.403 0.000 0.440 2.919 0.441 0.273 0.000 0.067 2.137

0. 104

0. 110 0.000 0.003 0.014 0.003 0.056 0.000 0.000 6.795 0.015 0.279 0.000 0.709 7.892 0.031 0.507 0.000 0.157 47.301 1.245 2.628 0.000 1.376 35 0

166 18.172 0.000 52.550