ML20058B723
| ML20058B723 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/31/1993 |
| From: | Fenech R, Hollomon T TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9312020192 | |
| Download: ML20058B723 (10) | |
Text
,
d lenrnsee Vaney Authonry. Post Off.e Box 2000. Soddy-Dwsy. Tennenee 37379 20 K
Robert A. Fenech vec P emoent Sequoyah Nuclear Piant November 15, 1993 U.S. Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D.C. 20555 Gentlemen:
In the Matter of
)
Docket Nos. 50-327 Tennessee Valley Authority
)
50-328 SEQUOYAH NUCLEAR PIANT (SQN) - OCTOBER 1993 MONTHLY OPERATING REPORT Enclosed is the October 1993 Monthly Operating Report as required by SQN Technical Specification 6.9.1.10.
If you have any questions concerning this matter, please call J. W. Proffitt at (615) 843-6651.
Sincerely, k
Robert A. Fenech Enclosure cc:
See page 2 9312020192 931031 PDR ADOCK 05000327
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U.S. Nuclear Regulatory Commission l
Page 2 November 15, 1993 l
cc (Enclosure):
INPO Records Center Institute of Nuclear Power Operat' ions 700 Galleria Parkway.
l Atlanta, Georgia 30339-5957 Mr. D. E. LaBarge, Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike l
Rockville, Maryland 20852-2739 Mr. Ted Marston, Director Electric Power Research Institute P.O. Box 10412 Palo Alto, California 94304 NRC Resident Inspector Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 Regional Administration U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-2711 Regional Administrator U.S. Nuclear Regulatory Commission Legion II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323-2711 Mr. F. Yost, Director Research Services Utility Data Institute 1700 K Street, NW, Suite 400 Washington, D.C. 20006-3800 J
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TENNESSEE VALIEY AUTHORITY NUCLEAR POWER GROUP SEQUOYAH NUCLEAR PLANT l
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l MONTHLY OPERATING REPORT 1
f 70 THE' i
' NUCLEAR REGUIATORY CGWIISSIGi i
DCEDBER 1993 l
UNIT 1 r
DOCKET NWEBER 50-327 LICENSE NIMBER DPR-77 l
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UNIT 2 DOCKET NIMBER 50-328
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LICENSE NIMBER DPR-79 l
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o OPERATIONAL SUMHARY-OCTOBER 1993 i
UNIT 1 l
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li Ihe Unit 1 Cycle 6 refueling outage continues; Unit i remained'in Mode 5 at the end of October.
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UNIT 2 i
Unit 2 generated 33,000 megawatthours (MWh)'(gross)' electrical' power
- l during October with'a capacity factorfof 3.81 percent. LUnit 2 began the month in Mode 5.
The restart of' Unit ~ 2 began" on October 11 when' the Lunit' entered Mode 4 at 0834 Eastern' daylight time (EDT). -The unit entered-j Mode 3 on October 13 at 1834-EDT, and the reactor was taken critical on i
October 19 at 1639 EDT. Unit 2 entered Mode 1 on OctoberE21 at.
1310 EDT.
Unit 2 tied online at approximately.15 percent power on i
October 21 at 2256 EDT.
.i On October 22 at 1450 EDT, letdown automatically isolated and the alternate letdown flowpath could not be established. Unit shutdown was initiated. Unit 2 entered Mode 3 at 1831'EDT that day. The letdown-isolation valve problems were corrected.
Unit 2 was taken critical on October 26 at-2345 EDT and was online on October 27 at 0748 EDT. Unit 2.was_ operating at approximately.30 percent reactor power when the main generator voltage regulator was placed in-
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manual as a result of erratic readings in automatic.
Unit 2 was taken offline on October 30 at 0423 EDT as a result of erratic readings from the voltage regulator. The reactor remained at approximately 20 percent. reactor power.: Repairs to the voltage regulator were performed, and the unit was returned to service; on October j31 at 0149 EPT when the generator was returned 'to service.
Unit 2 was operating at approximately 49 percent-reactor power at the end of October.
EQWER-OPERATED RELIEF VALVES (PORVs) AND SAFETY YALVES SUMMARI There were no challenges to PORVs or safety valves ii. October.
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AVERAGE IRILY UNIT POWER 12 VEL ~
t DOCKET NO.
50-327 UNIT No.
One DATE:
11-04-93 COMPLETED BY:
T. J. Hollomon TELEPHONE: - (615) 843-7528 i
MONTH:
OCTOBER 1993 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net)
DAY (MWe-Net) 1
-7 17 2
-7 18
-2 f
3
-7 19.
-7 4
-5 20
-16 i
5
-7 21
-16 6
-5 22
-19 7
-7 23
-16 8
-7 24
-19 9
-7 25
-14' 10
-9
. 26
- -16' 11
-14 27
-9 12
-16 28 !
- i
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13
-16 29-
-14
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a 14
-19 30 1 l
15
-16 31-
-2 16
-16 j
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9 p._-.___-
ag p
g y.
,9+-.
9 9-y g
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'i AVERAGE DAILY UNIT POWER LEVEL l
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DOCKET NO.
50-328 UNIT No.
'Two
'DATE:- 04-93
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,t COMPLETED BY:
T. J. Hollomon
^ TELEPHONE: -(615) 843-7528
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MONTH:
OCTOBER 1993
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AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL-DAY (MWe-Nat)-
.D&X'
' (MWe-Net.) ~
1
-14
- 17
-16 ~
2
-16 18
-19' -
l 3
-16 19 -
j 4
-16 20
-19 5
-16 21 :
e t
6
-14 22 92 i
7
-14 23
- 21 ' -
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8
-19 24
~ 16-
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9
-16 25
-21'
- {
10
-19 26-
-23 l
11
-14 27 169 j
i 12
-19 28 310'
'l 13
-21 29
'310-14
-21 30
-1 15
-19 31 339' 1
16
-19 l
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OPERATING DATA REPORT DOCKET NO. _5D-327 DATE 11/04/93 COMPLETED BY T. J. Hollomon TELEPHONE 16.15) 843-7528 i
QPERAIING STATUS l Notes l
1.
Unit Name: __Stouoyah Unit One l
l 2.
Reporting Period:
October 1993 l
l 3.
Licensed Thermal Power (MWL): 3411.0 l
l 4.
Nameplate Rating (Gross MWe): 1220.6 l
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Design Electrical Rating (Net MWe): 1148.0 l
l 6.
Maximum Dependable Capacity (Gross MWe): 1162.0 l
l 7.
Maximum Dependable Capacity (Net MWe): 1122.0 l
l 8.
If Changes Occur in Capacity Ratings (Item Numbers 3 Through 7) Since Last Report. Give Reasons:
9.
Power Level To Which Restricted If Any (Net MWe):
N/A
- 10. Reasons for Restrictions, If Any:
N/A This Month Yr-to-Date Cumulative
- 11. Hours in Reporting Period 745 7.296 108.145'
- 12. Number of Hours Reactor Was Critical 0
1.281.3 56.029
- 13. Reactor Reserve Shutdown Hours 0
0 0
- 14. Hours Generator On-Line 0
1.220.6:
54.828.5
- 15. Unit Reserve Shutdown Hours 0
0 0
- 16. Gross Thermal Energy Generated (MWH) 0 3.915.909 5_
178.893.754 2
- 17. Gross Electrical Energy Generated (MWH) 0 1.358.540 60.702.654
- 18. Net Electrical Energy Generated (MWH)
-9.296 1.254.835 58.177.057
- 19. Unit Service Factor 0
16.7 50.7
- 20. Unit Availability Factor 0
16.7 50.7
- 21. Unit Capacity Factor (Using HDC Net)
-1.1 15 3, 47.9
- 22. Unit Capacity Factor (Using DER Net)
-1.1 15.0 46.9
- 23. Unit Forced Outage Rate 0
47.5._
38.7
- 24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):
- 25. If Shut Down At End Of Report Period. Estimated Date of Startup:
January 15. 1994
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DPERATING DATA REPORT-j 0
DOCKET NO.
50-328 DATE-- 11/04/93-j
- COMPLETED BY. T.1.' Ho11omon -
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' TELEPHONE.(6151 843-7528 i
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DPERATING STATUS l Notes-
.l 1.
Unit Name:
Seouovah Unit Two
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.l-2.
Reporting Period: October 1993 -
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3.
Licensed Thermal Power (MWt): 3411.0 l
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4.
Nameplate Rating (Gross MWe): 1220.6
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Design Electrical Rating (Net.HWe): '1148.0-l
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6.
Haximum Dependable' Capacity (Gross MWe): '1162.0
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7.
Maximum Dependable Capacity (Net MWe): 1122.0-
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8.
If Changes Occur in Capacity Ratings (Item Numbers 3 Through 7)lSince Last Report.: Give Reasons:
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l 9.
Power Level To Which Restricted, I'f Any (Net MWe):
N/A-
- 10. Reasons For Restrictions, If Any:
N/A f
f This Month-
'Yr-to-Date' Cumulative.
11, Hours in v porting Period 745 7.296 100.105 l
- 12. Number of Hours Reactor Was Critical
'195.1 1.487.0:
' 57.700 j{
- 13. Reactor Reserve Shutdown Hours 0-0-
0-i
- 14. Hours Generator On-Line 110.6 1.268.8 56.346.2
.[
- 15. Unit Reserve Shutdown Hours 0
0
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- 16. Gross Thermal Energy Generated (MWH) 137.773.5
'3.911^078.6 177.092.858-
- 17. Gross Electrical Energy Generated (MWn}
33.000
'1.316.783~
60.039.902 1
- 18. Het Electrical Energy Generated (MWH)-
18.736 1.213.437 57.428.712-1
- 19. Unit Service Factor 14.8-17.4 56.3-f
- 20. Unit Availability Factor 14.8 17.4 56.3" i]
- 21. Unit Capacity Factor (Using MDC Net) 2.2 "14.8 51.1
- 22. Unit Capacity Factor (Using DER Net) 2.2 '
14.5 50.0
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- 23. Unit Forced Outage Rate 81,.2 _.,_,
82.6 37.2-l
- 24. Shutdowns Scheduled Over Next 6 Months (Type. Date, and Duration of Each):
Unit 2 Cvele 6 Refuelina Outaae: April 1.1994: 65 days
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- 25. If Shut Down At End Of Report Period, Estimated Date of Startup:
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DOCKET NO:
50-327 UNIT SHUTDOMAS AND POWER REDUCTIONS UNIT NAME:
One DATE:
11/08/93 REPORT MONTH: October 1993 COMPLETED BY:T. J. Hollomqa TELEPHONE:f615) 843-7528 Method of Licensee Cause and Corrective Duration Shutting Down Event System Component Action to l
2 3
4 5
No.
Date Type (Hours)
Reason Reactor Report No.
Code Code Prevent Recurrence 4
931001 5
745 C
4 N/A N/A N/A The Unit 1 Cycle 6 refueling outage continues.
2 3
I: Forced Reason:
Method:
Exhibit G-Instructions F
5: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram Entry sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File D-Regulatory Restruction 4-Continuation of Existing Outage (NUREG-1022)
E-Operator Training and License Examination 5-Reduction F-Administrative 9-Other 5
G-Operational Error (Explain)
Exhibit I-Same Source H-Other (Explain)
DDCKET NO:
50-323 UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME:
Two DATE:
11/08/93 REPORT MONTH: Octcher 1993 COMPLETED BY:T. J. Hollomon TELEPHONE:(615) 843-7521 Method of Licensee Cause and Corrective Duration Shutting Down Event System Component Action to l
2 4
No.
( Date Type (Hours)
Reason Reactor Report No.
Code Code 5 Prevent Recurrence 3
931001 F
502.9 A
4 328/93001 TL EXC Unit 2 was returned to service on October 21 at 2256 Eastern daylight time (EDT) ending the forced outage for erosion / corrosion problems.
4 931022 F
110.0 A
1 N/A N/A N/A On October 22 at 1450 EDT, letdown automatically isolated. Excess let-down also experienced problems. A decision was made to take the unit offline. Unit 2 was taken offline at 1748 EDT. The letdown valve iso-lated because of a ruptured dia-phragm on the valve. The ruptured diaphragm was caused by incorrect installation of the diaphragm. The incorrect installation is limited to this valve because of its location and the awkwardness of repairing the valve. The excess letdown problem was caused by an air leak to the valve. As a result of the air leak, the air regulator could not, maintain proper air pressure, resulting in a failure of the air regulator.
Unit 2 was returned to service on October 27 at 0748 EDT.
5 931030 F
21.4 B
5 N/A N/A N/A Unit 2 was operating at approxi-mately 38 percent reactor power when the decision was made to reduce power to 20 percent, remove the unit from the grid, and make repairs to the main generator voltage regulator as a result of erratic readings. Unit 2 was taken of fline at 0423 EDT on October 30.
Repairs on the voltage regulator were performed, and the unit was returned to service on October 31.
2 3
I: Forced Reason:
Hethod:
Exhibit G-Instructions F
S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Haintenance or Test 2-Manual Scram Entry sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File I
D-Regulatory Restruction 4-Continuation of Existing 09tage (NUREG-1022)
E-Operator Training and License Examination 5-Reduction F-Administrative 9-Other S
G-Operational Error (Explain)
Exhibit 1-Same Source H-Other (Explain)
.