ML20245F941
| ML20245F941 | |
| Person / Time | |
|---|---|
| Site: | Summer  |
| Issue date: | 07/31/1989 |
| From: | Bradham O, Haltiwanger J SOUTH CAROLINA ELECTRIC & GAS CO. |
| To: | Barry L NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 8908150136 | |
| Download: ML20245F941 (5) | |
Text
7.,
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'10CFR50,36 3r South Cirolina Electric & Gis Company 01113 S. BridhIm P.O. Box 88.
Vice President a
?;.
Jenkinsville, SC 29066 Nuclear Operations (803) 3454 040 3
13
-SCE&G 1j
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August 11, 1989 i
I L
i
' Document Control. Desk l
U. S. Nuclear Regulatory Commission Washington, DC 20555 Attention: Mr. Learned W. Barry g
[
SUBJECT:
Virgil C. !Jmmer Nuclear Station Docket No. 50/395 i
Operating License No. NPF-12 i
July Monthly Operating Report
. Gentlemen:
Please find enclosed the July 1989 Monthly Operating Report for the Virgil C.
Summer Nuclear Station Unit No.-1.
This submittal is made in accordance with the requirements of Technical Specifications, Section 6.9.1.10.
If there are any questions, please call me at your convenience.
Very truly yours,
~
- 0. S. Bradham RJB/JWH/0SB: led Attachments c:
D. A. Nauman/0. W. Dixon, Jr./T. C. Nichols, Jr.
E. C. Roberts W. A. Williams, Jr.
J. B. Knotts, Jr.
S. D. Ebneter INP0 Records Center J. J. Hayes, Jr.
ANI Library General Managers J. W. F11tter C. A. Price /R. M. Campbell, Jr.
Marsh & McLennan R. B. Clary NPCF K. E. Nodland NSRC J. C. Snelson RTS (RG 890002)
R. L. Prevatte File (818.03-1)
I i
8908130136 890731 PDR ADOCK 05000395 l
R PDC
Document Control Desk July Monthly Operating Report Page 1 ATTACHMENT I AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.:
50/395 UNIT:
V. C. SUMMER I DATE: 08/01/89 COMPLETED 8Y:
J. W. HALTIWANGER TELEPHONE:
(803) 345-4297 JULY 1989 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)
(MWe-Net) 1.
870 17.
867 2.
870 18.
867 3.
871 19.
869 4.
872 20.
869 5.
871 21.
868 6.
869 22.
869 7.
868 23.
868 8.
868 24.
866 9.
856 25.
865 10.
865 26.
866 11.
512 27.
867 12.
-34 28.
865 13.
115 29.
867 14.
403 30.
868 15.
865 31.
868 16.
866 I
m..
7 Document Control Desk July Monthly Operating Report
_Page.2 ATTACHMENT-II l
OPERATING DATA REPORT DOCKET NO.:
50/395 UNIT:
V. C. SUMMER I DATE: 08/01/89 COMPLETED BY:
J. W. HALTIWANGER
. TELEPHONE:
(803) 345-4297 OPERATING STATUS
- 1. Reporting Period:
July 1989
' Gross Hours in_ Reporting Period:
744
- 2. Currently Authorized Power Level (MWt):
2775 Max. Depend. Capacity (MWe_ Net):
885 Design Electrical Rating (MWe_ Net):
900
- 3. Power Level to Which Restricted (If Any)(MWe_ Net): N/A
- 4. Reasons for Restrictions:
N/A I
THIS MONTH YR TO DATE CUMULATIVE l
- 5. Number of Hours Reactor Critical 728.7 4096.0' 36832.6
- 6. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
- 7. Hours Generator on Line 705.0 4010.0 36092.7
- 8. Unit Reserve Shutdown Hours 0.0 0.0 0.0
- 9. Gross Thermal Energy-Generated (MWH) 1914784 9780063 94628667
- 10. Gross Electrical Energy (MWH) 613570 3164590 31311419
- 11. Net Elect ' cal Energy Generated (MWH) 586296 2992742 29679900 l
- 12. Reactor Service Factor 97.9 80.5 75.3 4
- 13. Reactor Availability Factor 97.9 80.5 75.3
- 14. Unit Service Factor 94.8 78.8 73.8 q
- 15. Unit Availability Factor 94.8 78.8 73.8 16.' Unit Capacity Factor (Using MDC) 89.0 66.5 68.5 j
- 17. Unit Capacity Factor (Design MWe) 87.6 65.4 67.4 1
- 18. Unit Forced Outage Rate 5.2 21.2 8.2 1
- 19. Shutdowns Scheduled Over Next 6 Months (Type, Date & Duration of Each):
)
None
- 20. If Shut Down at End of Report Period Estimated Date of Startup:
N/A
- 21. Units in Test Status (Prior to Commercial Operation): N/A i
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l-Document Control Desk July Monthly Operating Report Page 3 1
I i
ATTACHMENT III l
UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO.:
50/395 I
UNIT:
V. C. SUMMER I j
DATE:
08/01/89 i
COMPLETED BY:
J. W. HALTIWANGER
]
TELEPHONE:
(803) 345-4297 JULY 1989 l
Method of TYPE Shutting l
F or S Duration Down the Corrective Actions /
)
No.
Date Reason Forced or (Hours)
Reactor or Comments
{
Scheduled Reducing l
Power 7
890711 F
.39.0 G
3 Turbine Runback Relay Replaced
)
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,o Document Control Desk July Monthly Operating Report Page 4 ATTACHMENT IV NARRATIVE
SUMMARY
OF OPERATING EXPERIENCE DOCKET N0.:
50/395 UNIT:
V. C. SUMMER I DATE:
08/01/89 COMPLETED BY:
J. W. HALTIWANGER TELEPHONE:
(803) 345-4297 JULY 1989 i
l The Virgil C. Summer Nuclear Station (VCSNS) operated at approximately 100% power
- until July 11, 1989 at 1435 hours0.0166 days <br />0.399 hours <br />0.00237 weeks <br />5.460175e-4 months <br /> when a reactor trip was initiated as a result of an I&C technician shorting a circuit in the generator stator water cooling system panel. This short should have resulted in a unit runback to 25% power, but the relay which initiates the runback was defective and the unit remained at 100%
power. The generator protection circuit caused a generator / turbine trip and a subsequent reactor trip. The defective turbine runback relay was replaced.
In addition to VCSNS, three other SCE&G generating facilities tripped. As a result of the loss of four generating stations, the off-site voltage to the ESF busses decreased below the minimum acceptable value, and a Notification of Unusual Event (NUE);wasdeclaredat1510 hours. As a result of the degraded voltage condition, both trains of ESF busses separated from offsite power and automatically sequenced
'j onto their respective diesel generator. Voltage on the ESF circuits was returned to an acceptable level at approximately 1645 hours0.019 days <br />0.457 hours <br />0.00272 weeks <br />6.259225e-4 months <br />. The NUE was terminated at approximately 1710 hours0.0198 days <br />0.475 hours <br />0.00283 weeks <br />6.50655e-4 months <br />. There were no personnel injuries or releases of radioactive materials as a result of this event, i
On July 12. at 0555 hours0.00642 days <br />0.154 hours <br />9.176587e-4 weeks <br />2.111775e-4 months <br />, the reactor was taken critical. On July 13, at 0537 hours0.00622 days <br />0.149 hours <br />8.878968e-4 weeks <br />2.043285e-4 months <br />, the generator was placed on line.
The plant operated at approximately 100% power through the rest of July.
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