ML090890289

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Submittal of 2008 Annual Operating Report
ML090890289
Person / Time
Site: Summer South Carolina Electric & Gas Company icon.png
Issue date: 03/25/2009
From: Archie J
South Carolina Electric & Gas Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML090890289 (9)
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Text

Jeffrey B. Archie Vice President,Nuclear Operations 803.345.4214 A SCANA COMPANY March 25, 2009 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

Dear Sir/Madam:

Subject:

VIRGIL C. SUMMER NUCLEAR STATION DOCKET NO. 50-395 OPERATING LICENSE NO. NPF-12 ANNUAL OPERATING REPORT Enclosed is the 2008 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.

SBR/JBA/cm Attachment c: K. B. Marsh K. M. Sutton S. A. Byrne D. L. Abstance N. S. Carns E. Everett J. H. Hamilton J&H Marsh & McLennan R. J. White NRC Resident Inspector K. J. Browne NSRC L. A. Reyes RTS (LTD 292)

R. E. Martin File (818.02-10, RR 8225)

REIRS Project Manager PRSF (RC-09-0031)

M. L. Thomas SCE&G I Virgil C.Summer Nuclear Station - P.0. Box 88 . Jenkinsville, South Carolina 29065 .T (803) 345.5209

  • www.scana.com

VIRGIL C. SUMMER NUCLEAR STATION 2008 ANNUAL OPERATING REPORT

Document Control Desk LTD 292 RC-09-0031 Page 2 of 8 PREFACE The 2008 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 LTD 292 RC-09-0031 Page 3 of 8 TABLE OF CONTENTS SECTION TITLE PAGE 1.0 Introduction 4 2.0 Operational Data 4 3.0 Operating Summary 4 4.0 Exposures 6 5.0 Failed Fuel 6 ATTACHMENTS

1. 2008 Man-Rem Report

Document Control Desk LTD 292 RC-09-0031 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, 2008, the station operated at a capacity factor of 84.6% (using maximum dependable capacity) and a unit availability of 84.3%. The reactor was critical for a total of 7451.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, the generator remained on line 7405.6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and the total gross electrical energy generated for 2008 was 7,462,980 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 2 4 th. On January 2 4 tb ,the reactor was manually tripped due to a rapid decrease in level in the "C" steam generator. The decreasing steam generator level was caused by a failure of the "C" feedwater flow control valve. The "C" feedwater flow control valve failure was caused by brass particulate in the valve positioner.

Several hours after the reactor trip, the upper motor bearing on the "B" circulating water pump failed. Repairs were completed on the "C" feedwater flow control valve and the "B" circulating water pump motor on February 1 st. Reactor power was restored to 100% on February 2 nd.

VCSNS operated at 100% power from February 2 nd to April 2 3 rd. On April 23'd, power was reduced to 85% for main steam safety valve testing and preparation for the unit shutdown for Refueling Outage Seventeen (17).

The refueling outage began with the opening of the main generator breaker at 23:36 on April 2 5 th. The plant remained shutdown for the refueling outage until June 1 4 th when the main generator breaker was closed. The turbine was taken offline from June 1 4 th at 08:44 to June 1 4th at 10:30 to perform turbine overspeed trip testing. Reactor power was restored to 100% at on June 1 7 th

Document Control Desk LTD 292 RC-09-0031 Page 5 of 8 VCSNS operated at 100% power from June 1 7 th to October 4 th. On October 4t , power was reduced to 90% for turbine valve testing. Reactor power was restored to 100% on October 4 th. The plant operated at 100%

power for the remainder of 2008.

Refueling Outage 17 Summary The main generator breaker was opened at 23:36 on April 2 5 th for Refueling Outage 17.

Major work included:

  • Inspection and testing of the main turbine high pressure rotor

" Regreasing of the reactor building tendons

  • Visual and integrity testing of the main generator
  • Overhaul and inspection of the "B" feedwater booster pump
  • Addition of vacuum reliefs and valves changes on the service water lines to the reactor building cooling units

" Upgrades to the reactor building safety equipment Refueling Outage 17 duration was 49.2 days. Outage planned duration was 38 days. Personnel exposure in 2008 due to the outage was approximately 56.8 Rem based on electronic dosimeters.

Document Control Desk LTD 292 RC-09-0031 Page 6 of 8 Forced Power Reduction >20% Exceeding 4 Hours On January 2 4 th, the reactor was manually tripped due to a rapid decrease in level in the "C" steam generator. The decreasing steam generator level was caused by a failure of the "C" feedwater flow control valve. The "C" feedwater flow control failure was caused by brass particulate in the valve positioner. Several hours after the reactor trip, the upper motor bearing on the "B" circulating water pump failed. Repairs were completed on the "C" feedwater flow control valve and the "B" circulating water pump motor on February 1 st. Reactor power was restored to 100% on February 2 nd. 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 195.5 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 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.

5.0 FAILED FUEL VCSNS did not have any indications of failed fuel in 2008.

Document Control. Desk LTD 292 RC-09-0031 Page 7 of 8 ATTACHMENT I TO 2008 ANNUAL REPORT

  • Document Control Desk LTD 292 RC-09-0031 Page 8 of 8 South Carolina Electric & Gas Company V. C. Summer Nuclear Station Computerized Exposure Nuclear Tracking System Personnel and Man-Rem by Work and Duty Function Final End of Year Report for 2008 NIImhAr of PAr~onnAI OvAr 100 mRAm Tnt~I M~in-Rpm Work and Job Function Station Utility Contract Station Utility Contract

________________________Workers Workers Workers Workers Workers Workers Routine Maintenance Maintenance Personnel 5 0 41 2.525 0.000 14.501 Operations Personnel 1 0 0 0.551 0.000 0.350 Health Physics Personnel 0 0 2 0.280 0.000 0.448 Supervisory Personnel 0 0 0 0.031 0.000 0.000 Engineering Personnel 0 0 1 0.120 0.000 0.184 Special Maintenance Maintenance Personnel 8 0 52 3.071 0.000 16.563 Operations Personnel 0 0 0 0.414 0.000 0.323 Health Physics Personnel 3 0 2 0.585 0.000 0.566 Supervisory Personnel 0 0 0 0.053 0.000 0.000 Engineering Personnel 0 0 1 0.154 0.000 0.257 Reactor Operations & Surveillance _____

Maintenance Personnel 0 0 5 0.490 0.000 2.879 Operations Personnel 0 0 0 0.552 0.000 0.174 Health Physics Personnel 2 0 0 0.399 0.000 0.438 Supervisory Personnel 0 0 0 0.030 0.000 0.000 Engineering Personnel 0 0 0 0.034 0.000 0.003 Waste Processing Maintenance Personnel 0 0 1 0.014 0.000 0.146 Operations Personnel 0 0 0 0.000 0.000 0.001 Health Physics Personnel 2 0 0 0.464 0.000 0.030 Supervisory Personnel 0 0 0 0.055 0.000 0.000 Engineering Personnel 0 0 0 0.000 0.000 0.003 In-Service Inspection Maintenance Personnel 1 0 17 0.229 0.000 4.623 Operations Personnel 1 0 0 0.392 0.000 0.000 Health Physics Personnel 0 0 0 0.008 0.000 0.010 Supervisory Personnel 0 0 0 0.006 0.000 0.000 Engineering Personnel 0 0 0 0.008 0.000 0.022 Refueling________

Maintenance Personnel 1 0 26 0.506 0.000 7.771 Operations Personnel 0 0 0 0.132 0.000 0.013 Health Physics Personnel 0 0 0 0.100 0.000 0.144 Supervisory Personnel 0 0 0 0.000 0.000 0.000 Engineering Personnel 0 0 1 0.010 0.000 0.420 Totals Maintenance Personnel 15 0 142 6.835 0.000 46.483 Operations Personnel 2 0 0 2.041 0.000 0.861 Health Physics Personnel 7 0 4 1.836 0.000 1.636 Supervisory Personnel 0 0 0 0.175 0.000 0.000 Engineering Personnel 0 0 3 0.326 0.000 0.889 Grand Total 24 0 149 11.213 0.000 49.869

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