ML20078K260

Monthly Operating Rept for Aug 1983

ML20078K260
Person / Time
Site:	Summer
Issue date:	09/12/1983
From:	Dixon O, Gabe Taylor SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Barry L NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8310190028
Download: ML20078K260 (5)

Text

5 Director, Office of Resource Management Monthly Operating Report Page 2 September 12, 1983 ATTACHMENT I AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50/395 UNIT V. C.

SUMMER I DATE 09/12/83 COMPLETED BY G. J. Taylor TELEPHONE (803) 345-5209 MONTH AUGUST 1983 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

882 17.

509 2.

881 18.

0 3

882 19.

434 4.

880 20.

874 5

882 21.

883 6.

883 22.

877 7.

883 23.

876 8.

879 24.

875 9

880 25.

876 10.

877 26.

878 11.

355 27.

879 12.

0 28.

878 13.

74 29.

8 74 14.

556 30.

874 15 880 31.

871 16.

884 8310190028 830912 DR ADOCK 05000395 PDR oY(

L Director, Office of Resource Management Monthly Operating Report Page 3 Ssptember 12, 1983 ATTACHMENT II OPERATING DATA REPORT DOCKET NO.

50/395 UNIT V.

C.

SUMMER I DATE 09/12/83 COMPLETED BY G.

J. Taylor TELEPHONE (803) 345-5209 OPERATING STATUS

1. Reporting Period:

AUGUST 1983 Gross Hours in Reporting Period:

744

2. Currently Authorized Power Level (MWt):

2775 Max. Depend. Capacity (MWe-Net):

N/A Design Electrical Rating (MWe-Net):

900

3. Power Level to which restricted (If Any)(MWe-Net):

N/A

4. Reasons for Restrictions (If Any):

THIS MONTH YR TO DATE CUMULATIVE

5. Number of Hours Reactor Was Critical 682.5 4113.1 5419.9

6. Reactor Reserve Shutdown Hours 0

0 0

7. Hours Generator on Line 662.92 4001.4 4762.7

8. Unit Reserve Shutdown Hours 0

0 0

9. Gross Thermal Energy Generated (MWH) 1,758,090 7,947,062 8,742,935

10. Gross Electrical Energy Generated (MWH) 577,360 2,596,542 2,812,759

11. Net Electrical Energy Generated (MWH) 551,260 2,455,669 2,646,865

12. Reactor Service Factor N/A N/A N/A

13. Reactor Availability Factor N/A N/A N/A

14. Unit Service Factor N/A N/A N/A

15. Unit Availability Factor N/A N/A N/A

16. Unit Capacity Factor (Using MDC)

N/A N/A N/A

17. Unit Capacity Factor (Using Design MWe)

N/A N/A N/A

18. Unit Forced Outage Rate N/A N/A N/A

19. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Steam Generator Eddy Current, November 1983, 14 days.

20. If Shut Down at End of Report Period, Estimated Date of Startup:

N/A

21. Units in Test Status (Prior to Commerical Operation) :

FORECAST ACHIEVED Initial Criticality 10-20-82 10-22-82 Initial Electricity 11-17-82 11-16-82 Commercial Operation

Director, Office of Resource Management Monthly Operating Report Page 4 September 12, 1983 ATTACHMENT III UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO.

50/395 UNIT V. C.

SUMMER I DATE 09/12/83 COMPLETED BY G.

J. Taylor TELEPHONE (603) 345-5209 (1)

METHOD OF (2)

TYPE SHUTTING DOWN F: FORCED DURATION THE REACTOR OR CORRECTIVE ACTIONS /

NO.

DATE S: SCHEDULED (HOURS) REASON REDUCING POWER COMMENTS 13 830811 F

28.1 A

3

13) Turbine Trip, high l.

vib ration.

14 830813 F

9. 8 A

3 14 ). Turbine Trip, 0-Ring failure "A" Master Trip Solenoid 15 830817 F

23.7 0

3

15) Main Generator Trip, generator potential transformer drawer opened.

t 4

i

Director, Of fice of Resource Management Monthly Operating Report Page 5 l

September 12,-1983 ATTACHMENT IV NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE Virgil C.

Summer Nuclear Station, Unit No. 1, continued operation at power levels up to 100% power during August 1983.

On August 11, 1983, at 1009 hours0.0117 days <br />0.28 hours <br />0.00167 weeks <br />3.839245e-4 months <br />, the reactor tripped from 100%

power due to a turbine trip on high bearing vibration.

Apparent

)

cause was a spurious signal.

On August 12, 1983, at 0253 hours0.00293 days <br />0.0703 hours <br />4.183201e-4 weeks <br />9.62665e-5 months <br />, a rapid cooldown from 557*F to 537*F occurred while the reactor was in hot standby.

A Main Steam Isolation Valve was closed terminating cooldown.

The cause was a broken yoke on the actuator of a steam dump valve.

Primary pressure decreased to approximately 2050 psi.

On August 13,198 3, at 0214 hours0.00248 days <br />0.0594 hours <br />3.53836e-4 weeks <br />8.1427e-5 months <br />, the reactor tripped from 34%

power due to a turbine trip caused by failure of an O-ring in the "A" Master Trip Solenoid.

On August 17, 1983, at 1407 hours0.0163 days <br />0.391 hours <br />0.00233 weeks <br />5.353635e-4 months <br />, the reactor tripped from 100%

power due to a generator / turbine trip.

The cause of the event was an inadvertent opening of a generator potential compartment resulting in an unbalance in the "B"

phase.

On August 31, 1983, operation was continuing at approximately 100% power.

g, b

SOUTH CAROLINA ELECTRIC & GAS COMPANY Post oppica 7e4 COLUMe:A. south CAROLINA 29218 O. W. C'xON, JR.

vica PRasioeNT NucLsAR OPERATIONS September 12, 1983 Director, Office of Resource Management U. S. Nuclear Regulatory Commission MNBB 7602 Washington, DC 205SS ATTN:

Mr. Learned W. Barry

SUBJECT:

Virgil C. Summer Nuclear Station Docket No. 50/395 Operating License No. NPF-12 Monthly Operating Report

Dear Mr. Barry:

Please find enclosed the August 1983 Monthly Operating Report for Virgil C.

Summer Nuclear Station Unit No. 1 as required by Technical Specification 6.9.1.10.

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

Very truly yours,

0. W.

ixo, J r.

GJT:0WD:mac Attachment cc:

V. C.

Summer A. R. Koon T. C. Nichols, J r./0. W. Dixon, J r.

C. L. Ligon (NSRC)

E.

C. Roberts G. J. Braddick H. !!. Cy rus J.

C. Miller H.

R. Denton J. L. Skolds J.

P. O'Reilly J.

B. Knotts, Jr.

Group / General Managers INPO Records Center O.

S.

Bradham NPCF R. B. Clary File (Lic./Eng.)

C.

A.

Price