NOC-AE-000329, Monthly Operating Repts for Sept 1998 for Stp,Units 1 & 2. with

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Monthly Operating Repts for Sept 1998 for Stp,Units 1 & 2. with
ML20154N646
Person / Time
Site: South Texas  STP Nuclear Operating Company icon.png
Issue date: 09/30/1998
From: Hill R, Mallen F
HOUSTON LIGHTING & POWER CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NOC-AE-000329, NOC-AE-329, NUDOCS 9810220047
Download: ML20154N646 (14)
v • d • e


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. October 15,1998 NOC-AE-000329 File No. G02 STI30733511 10CFR50.71 U. S. Nuclear Regulatory Commission Attention: Document Control Desk

~ Washington, DC 20555 South Texas Project

' Units 1 and 2 Docket Nos. STN 50-498, STN 50-499 Monthly Operating Reports for September 1998 Pursuant to 10CFR50.71(a) and South Texas Project Electric Generating Station (STPEGS) Technical Specification 6.9.1.5, attached are the Monthly Operating Reports for September 1998.

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. If you should have any questions on this matter, please contact R. L. Hill at (512) 972-7667.

Sincerely, F. H. Mallen Manager, Planning & Controls I RLH/sl Attachments: 1) STPEGS Unit 1 Monthly Operating Report - September 1998

2) STPEGS Unit 2 Monthly Operating Report - September 1998

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9810220047 980930 E PDR ADOCK 05000498

NOC-AE-000329 File No.: G02 Page 2 c: Jon C. Wood Ellis W. Merschoff Matthews & Branscomb Regional Administrator, Region IV One Alamo Center U. S. Nuclear Regulatory Commission 106 S. St. Mary's Street, Suite 700 611 Ryan Plaza Drive, Suite 400 San Antonio,TX 78205-3692 Arlington, TX 76011-8064 Institute of Nuclear Power

. Thomas W. Alexion Operations - Records Center Project Manager, Mail Code 13H3 - 700 Galleria Parkway U. S. Nuclear Regulatory Commission Atlanta, GA 30339-5957 Washington, DC 20555-0001 Richard A. Ratliff Cornelius F. O'Keefe Bureau of Radiation Control Sr. Resident Inspector Texas Department of Health c/o U. S. Nuclear Regulatory Commission 1100 West 49th Street P. O. Box 910 Austin, TX 78756-3189 Bay City, TX 77404-0910 D. G. Tees /R. L. Balcom J. R. Newman; Esquire : Houston Lighting & Power Co. ,

Morgan, Lewis & Bockius P. O. Box 1700 j 1800 M. Street, N.W. Houston,TX 77251  :

Washington, DC 20036-5869 l Central Power and Light Company M. T. Hardt/W. C. Gunst ATTN: G. E. Vaughn/C. A. Johnson  !

City Public Service P. O. Box 289, Mail Code: N5012 l P. O. Box 1771 Wadsworth,TX 77483 San Antonio,TX 78296 U. S. Nuclear Regulatory Commission A. Ramirez/C. M. Canady Attention: Document Control Desk

. City of Austin' Washington, D.C. 20555-0001 Electric Utility Department 721 Barton S 7 ngs i Road Austin,TX 78704

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SOUTH TEXAS PROJECT l ELECTRIC GENERATING STATION 4 L

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u MONTHLY OPERATING REPORT SEPTEMBER 1998 -

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STP NUCLEAR OPERATING COMPANY NRC DOCKET NO. 50-498 l

LICENSE NO. NPF  ;

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l Reviewed By: d[M /s//. fdps -

D.L. COBB Date Approved By: / /o////F' G.L. PARKEY f Datl '1 I

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MONTHLY

SUMMARY

South T6xas Project Unit 1 began the reporting period operating at full power.

On September 12, at 0501 the main turbine was removed from service to disconnect the auxiliary transformer to allow repairs. The unit was returned to service at 1523 and achieved full power on September 13, at 1504.

On September 19,'at 0500 the main turbir.e was removed from service to reconnect the auxiliary transformer following repairs. The unit was returned to service at 1457 and achieved full power on September 20, at 1201.

-The unit operated for the remainder of the reporting period with no unit shutdowns or significant power reductions.

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6 l e, OPERATING DATA REPORT .

f DOCKET NO. 50-498

...~ 1 UNIT ~Oct.12,1998 DATE COMPLETED BY R.L. Hill TELEPHONE ' 512 972-7667 OPERATING STATUS

.li . REPORTING PERIOD: 9/1/98-9/30/98 GROSS HOURS IN REPORTING PERIOD: 72'O '

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CURRENTLY AUTHORIZED POWER LEVEL (Mwt): 3800 MAXIMUM DEPENDABLE CAPACITY (MWe-Net):-1250.6

DESIGN ELECTRICAL RATING (MWe-Net):' 1250.6

. 3. POWER LEVEL TO WHICH RESTRICTED (IF ANY) (MWe-Net): None .

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REASONS FOR RESTRICTION (IF ANY): N/A THIS MONTH YR TO DATE - CUMULATIVE -

' 5. NUMBER OF HOURS REACTOR CRITICAL. 720.0 6,551.0 64,587.1

6. REACTOR RESERVE SHUTDOWN HOURS - 0 0 .0

' 7. HOURS GENERATOR ON LINE 699.7 6,530.7 63,105.6  !

- 8. UNIT RESERVE SHUTDOWN HOURS ~ 0' 0 0 l

9.. . GROSS THERMAL ENERGY GENERATED (MWH) 2,565,574 24,736,175 234,053,767

10. GROSS ELECTRICAL ENERGY GENERATED (MWH) 868,197.' 8,456,955 79,816,519.

I1. NET ELECTRICAL ENERGY GENERATED (MWH) 826,937 8,099,312 76,012,058 12.~ REACTOR SERVICE FACTOR 100.0 % 100.0 % ' 72.9%

13. REACTOR AVAILABILITY FACTOR 100.0 % 100.0 % 72.9 %

.14. . UNIT SERVICE FACTOR 97.2 % 99.7 % 71.3%

15. ' UNIT AVAILABILITY FACTOR - 97.2% _ 99.7 % 71.3%
16. UNIT CAPACITY FACTOR (Using MDC) - 91.8 % 98.9 % 68.7 %

^ 17.~ UNIT CAPACITY FACTOR (Using Design MWe) 91.8 % 98.9 % 68.7 %

! 18.' UNIT FORCED OUTAGE RATE 0.0% 0.0% 18.7%

19) ' SHUTDOWNS SCHEDULED OVER NEXT 6 MONTHS (TYPE, DATE, AND DURATION OF EACH):

J Scheduled 40-day outage to allow refueling and 10-year in service inspection to begin on March 27,1999.

I 20.' IF SHUTDOWN AT END OF REPORT PERIOD, ESTIMATED DATE OF STARTUP: N/A t

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AVERAGE DAILY UNIT POWER LEVEL l 1

DOCKET NO. 50-498 j

  • '. - UNIT 1  ;

DATE det.12,1998 COMPLETED BY R.L.11111 TELEPHONE 512 972-7667

'-M NTII- SEPTEMBER i

DAY, AVERAGE DAILY POWER DAY AVERAGE DAILY POWER

- LEVEL- LEVEL (MWe-Net) (MWe-Net) 1

.l' 1243 17. 1250  ;

' 2' 1244 18 1250  !

3. 1240 19 103-

'4 1242~ 20 1023 '!

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'5 1242 21- 1242 )

6 .1242 22 1239 7' 1242' 23 1243

'8 -1240 24 1243 9 1245- 25 . 1241

' 10 . 1247 26 1242

- .11 '1249. 27 1241

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106_ . 28 .1242 13 '. .898' 29 1241 I I

14 1248- 30 123,7

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UNIT SIIUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-498 -

UNIT 1, DATE Oct.12,1998

' COMPLETED BY R.L Hill TELEPHONE 512 972-7667 REPORTMONTH SEPTEMBER ,

1 2 3 4 5 No. Date Type Duration Reason Method of Licensee System Component Cause & Corrective Action to Prevent Recurrence (Hours) Shutting Event Code Code Down Report #

Reactor 98-03 980912 S 10.3 B 1 N/A EA XFMR Main turbine removed from service to disconnect the Auxiliary Transformer to allow repairs.

98-04 980919 S 10.0 B 1 N/A EA XFMR Main turbine removed from service to reconnect the Auxiliary Transformer following repai s.

I 2 3 4 5 F: Forced Reason: Method: IEEE 805-1983 IEEE 803-1983 S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Cont. of Existing E-Operator Training & License Exam Outage F-Administrative 5-Reduction G-Operational Error (Explain) 9-Other H-Other (Explain)

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PORVS AND SAFETY VALVE

SUMMARY

There were nc PORV or Safety Valves challenged during the reporting period.

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SOUTH TEXAS PROJECT ELECTRIC GENERATING STATION UNIT 2 MONTHLY OPERATING REPORT SEPTEMBER 1998 STP NUCLEAR OPERATING COMPANY NRC DOCKET NO. 50-499 LICENSE NO. NPF-80 Reviewed By: M ////J/pg_

D.L. COBB Date '

Approved By: " /0 [f!fI R.E. MASSE Date'

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l MONTIILY

SUMMARY

l South Texas Project Unit 2 began the reporting period operating at full power.

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l On September 22, at 0932 the unit experienced an automatic reactor trip due to low water level in the 2A l steam generator caused by an inadvertently closed feedwater regulating valve. The unit was returned to l service on September 23, at 0637 and achieved full power on September 26, at 0706.

On September 27, at 0827 the unit began a reactor power coastdov n due to fuel burnup. The process entails a power reduction rate of 1-percent every 36 to 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

The unit concluded the reporting period operating at 96-percent reactor power.

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u OPERATING DATA REPORT DOCENT. 50-499 UNIT 2 DATE Oct.12,1998 COMPLETED BY R.L. Hill TELEPHONE 512 972-7667 OPERATING STATUS

1. REPORTING PERIOD: 9/1/98-9/30/98 GROSS HOURS IN REPORTING PERIOD: 720

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2. - CURRENTLY AUTHORIZED POWER LEVEL (Mwt): 3800 I MAXIMUM DEPENDABLE CAPACITY (MWe-Net): 1250.6 DESIGN ELECTRICAL RATING (MWe-Net): 1250.6 l
3. POWER LEVEL TO WHICH RESTRICTED (IF ANY) (MWe-Net); None
4. REASONS FOR RESTRICTION (IF ANY): N/A THIS MONTH YR TO DATE CUMULATIVE l

5, NUMBER OF HOURS REACTOR CRITICAL 706.5 6,515.0 61,306.4 i

6. REACTOR RESERVE SHUTDOWN HOURS 0 p 0 l
7. HOURS GENERATOR ON LINE 698.9 6,450.7 59,739.0 i
8. UNIT RESERVE SHUTDOWN HOURS p p 0
9. GROSS THERMAL ENERGY GENERATED (MWH) 2,580,964 24,483,520 221,827,030
10. GROSS ELECTRICAL ENERGY GENERATED (MWH) 874,448 8,351,818 75,516,797
11. NET ELECTRICAL ENERGY GENERATED (MWH) 833,625 7,997,943 72,078,120
12. REACTOR SERVICE FACTOR 98.1 % 99.5 % 75.3 %
13. REACTOR AVAILABILITY FACTOR 98.1 % 99.5% 75.3 %
14. UNIT SERVICE FACTOR 97.1 % 98.5 % 73.4 %
15. UNIT AVAILABILITY FACTOR 97.1 % 98.5 % 73.4 %
16. UNIT CAPACITY FACTOR (Using MDC) 92.6 % 97.6 % 70.8 %
17. UNIT CAPACITY FACTOR (Using Design MWe) 92.6 % 97.6 % 70.8 %
18. UNIT FORCED OUTAGE RATE 2.9% l .0% 18.1 %
19. SHUTDOWNS SCHEDULED OVER NEXT 6 MONTHS (TYPE, DATE, AND DURATION OF EACH):

Scheduled 21-day refueling outage to begin on October 3,1998.

20. IF SHUTDOWN AT END OF REPORT PERIOD, ESTIMATED DATE OF STARTUP: N/A

f AVERAGE DAILY UNIT POWER LEVEL DOCKETNO. 50-499 UNIT 2 DATE Oct.12, 1998 COMPLETED BY R.L. Ilill TELEPHONE 512 972-7667 MONTil SEPTEMBER DAY AVERAGE DAILY POWER DAY AVERAGE DAILY POWER LEVEL LEVEL (MWe-Net) (MWe-Net) 1 1240 17 1245 2 1241 18 1246 3 , 1240 19 1245 4 1237 20 1242 5 1238 21 1235 6 1239 22 460 7 1240 23 29 8 1242 24 8 9 1244 25 1208 1 1

10 1245 26 1232 11 1247 27 1218 12 1246 28 1212 l

13 1247 29 1202 14 1245 30 1186 15 1245 31 NA 16 1246

UNIT SIIUTDOWNS AND POWER REDUCTIONS DOCKE1NO. 50-499' UNIT 2 DATE Oct.12,1998 COMPLETED BY R.L. Hill TELEPHONE 512 972-7667 REPORTMONTH SEPTEMBER 1 2 3 4 5 No. Date Type Duration Reason Method of Licensee System Component Cause & Corrective Action to Prevent Recurrence (Hours) Shutting Event Code Code Down Report #

Reactor 98-02 980922 F 21.1 11 3 2-98-002 SJ FCV The unit experienced an automatic reactor trip due to decreased water level in the 2A steam generator. The level decrease followed the inadvertent closure of the 2A main feedwater regulating valve during corrective maintenance on the control circuitry of the 2A low power feedwater reguating valve. Work instructions governing the activity were technically incorrect.

Corrective actions include reviewing other similar work, discussing lessons learned and developing a case study.

98-03 980927 S 0.0 H 5 N/A N/A N/A 7he unit began a reactor power coastdown due to fuel burnup.

I 2 3 4 5 F: Forced Reason: Method: IEEE 805-1983 IEEE 803-1983 S: Scheduled A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram D-Regulatory Restriction 4-Cont. of Existing E-Operator Training & License Exam Outage F-Administrative 5-Reduction G-Operational Error (Explain) 9-Other H-Other (Explain)

PORVS AND SAFETY VALVE

SUMMARY

. There were no PORV or Safety Valves challenged during the reporting period.

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