ML20081M725

Monthly Operating Rept for Sept 1983

ML20081M725
Person / Time
Site:	Summer
Issue date:	10/14/1983
From:	Dixon O, Gabe Taylor SOUTH CAROLINA ELECTRIC & GAS CO.
To:	Barry L NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8311170348
Download: ML20081M725 (6)

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l Director, Office of Resource Management Monthly Operating Report Page 2 October 14,, 1983 ATTACHMENT I AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50/395 UNIT V. C. SUMMER I DATE 10/24/63 COMPLETED BY G. J. Taylor TELEPHONE (803) 345-5209 MONTH SEPTEMBER 1983 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)

1. 878 17 143

2. 878 18. 691 3 878 19 881

4. 880 20. 884

5. 878 21. 886

6. 473 22. 891

7. 267 23 891

8. 789 24. 892 9 876 25 892

10. 812' 26. 891

- 11. 303 27 892

12. 576 28. 750 13, 863 29 535

14. 877 30. 885 15 879 31. N/A

16. 870 8311170348 831014

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Director, Office of Resource Management Monthly Operating R6 port Page 3 October 14, 1983 ATTACHMENT II OPERATING DATA REPORT DOCKET NO. 50/395 UNIT V. C. SUMMER I DATE 10/14/83 COMPLETED BY G. J. Taylor TELEPHONE (803) 345-5209 OPERATING STATUS

1. Reporting Period: ' SEPTEMBER 1983 Gross Hours in Reporting Period: 720

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 707.6 4820.7 6127.5 6.. Reactor Reserve Shutdown Hours 0 0 0 7.' Hours Generator on Line 685.0 4686.4 5447 7

8. Unit Reserve Shutdown Hours 0 0 0

9. Gross Thermal Energy Generated (MWH) 1,749,405 9,696,467 10,492,340

10. Gross Electrical Energy Generated (MWH) 577,150 3,173,692 3,389,909

11. NetLElectrical Energy Generated (MWH) 551,551 3,007,220 3,198,416

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, Of fide of Resource Management M:nthly Operating Report P2ge' 4 October-14,-1983 ATTACHMENT III UNIT SHUTDOWNS AND POWER REDUCTIONS 4

DOCKET NO. 50/395 UNIT V. C. SUMMER I DATE 10/14/83 COMPLETED BY G. J. Taylor

,, TELEPHONE (803) 345-5209

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(1) METHOD OF - ( :2 )

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

NO. -DATE S:SCHSDULED (HOURS) REASON REDUCING POWER COMMENTS 16 830906 F 14.3 G 3 16) Reactor Trip on low-low Steam Generator level due to steam line pressure transmitter calibration, procedure error.

17 830911 F 10.6 A 3 17) Reactor Trip, caused by loss of offsite power s ou rce.

18 830917 S 10.1 B 1 18) Turbine off line for maintenance of permanent magnet generator power supply.

19 830928 F 0 A 4 19) Turbine Runback due-to Hi Stator Water Cooling System temperature.

Reactor power reduced by rod insertion and emergency boration.

b Director, Office of Resource Management

~ Monthly Operating Report Page 5 October 14, 1983 i.

ATTACHMENT IV NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE

-Virgil C. Summer Nuclear Station, Unit No. 1, continued power operation during September 1983.

On September 6, 1983, at 1320 hours0.0153 days <br />0.367 hours <br />0.00218 weeks <br />5.0226e-4 months <br />, the reactor tripped from 100%' power on low low level in Steam Generator "B".. Calibration testing was-in progress on alsteam line pressure instrument which provides pressure compensation for steam'line flow. .The

.cause is_ attributed to-procedural error. Appropriate procedure changes have been made.

On-September 11, 1983, at 0755 hours0.00874 days <br />0.21 hours <br />0.00125 weeks <br />2.872775e-4 months <br />, the reactor tripped from 100% power on High Power Range Flux _ Rate. The trip was initiated by loss of theill5'KVJoffsite safeguards power source.

On September- 12, 1983, at 0815 hours0.00943 days <br />0.226 hours <br />0.00135 weeks <br />3.101075e-4 months <br />, the unit _ experienced a 75%

load reduction from 75% power due to the removal of a balance of plantiinverter from service. The pressurizer power operated

-relief. valves-(PORV) .and steam generator safeties were ac tua ted.'

On September 17, 1983, power was reduced and the turbine generator was taken off line'at 0315 hours0.00365 days <br />0.0875 hours <br />5.208333e-4 weeks <br />1.198575e-4 months <br /> on September 18, 1983, for maintenance and turbine control valve modification.

On' September 28, 1983, at 1915 hours0.0222 days <br />0.532 hours <br />0.00317 weeks <br />7.286575e-4 months <br />, a main turbine / generator runback of.approximately 75% power occurred from 100% power due to high stator water temperature. A temperature control valve

' failed which bypassed the stator water cooler. The plant

. returned to 100% power after stator water cooling was restored.

Director, Of fice of Resource Management Monthly Operating Report Page 6 October 14, 1983 t

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE -- Continued On September 29, 1983, the Plant Safety Review Committee (PSRC) reviewed a change to the Radioactive Liquid Waste Treatment System. The problem involves rain water which collects in the Refueling Water Storage Tank (RWST) Pit. Currently, this water is being processed as radioactive fluid via the Waste Processing System since an alternate flow path does not exist. The modification will involve the addition of a 5,000 gallon tank and associated piping to be located on the 436' elevation northwest of the RWST Pit. Valves will normally be aligned to pump from the RWST sump into the 5,000 gallon drainage tank.

When it is desired to release the contents of the tank, the tank shall be isolated and agitated for approximately ten minutes and sampled. If the sample is acceptable for release, the drain tank will be aligned to the yard drainage system. If the sample is unacceptable for release to the yard drainage system, the contents of the tank will be drained back to the RWST Pit. The system will then be aligned to pump the fluid to the Waste Monitor Tank for processing. The drain tank foundation is sized and curbed to contain the entire contents of the drain tank in the event of a tank rupture. The foundation is sloped, and a drain is provided to the RWST Pit. Redundant valves are provided in the line to the yard drainage system to ensure against leakage from the drain tanc.

An evaluation was performed in accordance with 10 CFR 50.59 and no unreviewed safety question was found to exist. The determination was based on: (1) there is no increase in the probability of an occurrence, the consequences of an accident, or malfunction of safety related equipment as previously evaluated in the FSAR; (2) the possibility of an accident or malfunction of a dif ferent type than any previously evaluated in the FSAR is not increased; and.(3) the margin of safety as defined in the basis of any Technical Specification is not reduced.

The PSRC review of this modification confirmed that an Unreviewed Safety Question does not exist, and the modification was found to be acceptable for implementation.

On September 30, 1983, operation was continuing at approximately 100% power.

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SOUTH CAROLINA ELECTRIC & GAS COMPANY POST OFFICE 764 CotuwalA. SOUTH CAnOLINA 29218 o.w.oixon.;n.

VICE PRESIDENT Nu1 LEAR OPEmations October 14, 1983 Director, Office of Resource Management U. S. Nuclear Regulatory Commission MNBB 7602 Washington, DC 20555 ,

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 September 1983 Monthly Operating Report for Virgil C. Summer Nuclear StE. tion 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,

/ /

O. W. h on, GJT:OWD:mac/fjc Attachment cc: V. C. Summer C. A. Price E. C. Roberts A. R. Koon E. H. Crews C. L. Ligon (NSRC)

T. C. Nichols, Jr./O. W. Dixon, Jr. G. J. Braddick H. N. Cyrus D. J. Richards H. R. Denton NRC Res. Inspector J. P. O'Reilly J. B. Knotts, Jr.

Group Managers INPO Records Center O. S. Bradham NPCF R. B. Clary File (Lic./Eng.)

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