ML20066C538: Difference between revisions
StriderTol (talk | contribs) (StriderTol Bot insert) |
StriderTol (talk | contribs) (StriderTol Bot change) |
||
Line 17: | Line 17: | ||
=Text= | =Text= | ||
{{#Wiki_filter:}} | {{#Wiki_filter:. . -. | ||
1 i | |||
k VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 81-12 FOR THE MONTH OF DECEMBER, 1981 1 | |||
l i | |||
i ,' | |||
i f . | |||
J + | |||
r 8211100027 820112 PDR ADOCK 05000271 R pop | |||
OPERATING DATA REPORT DOCKET NO. 50-271 DATE 820112 COMPLETED BY F. J. Burger TELEPHONE (802)257-7711 Ext 137 OPERATING STATUS r | |||
' Notes | |||
: 1. Unit Name: Vermont Yankee | |||
: 2. R porting Period: Dect.mber 1981 | |||
: 3. Licensed Thermal Power (int): 1593 | |||
: 4. Ntmeplate Rating (Gross We): 540 | |||
: 5. Design Electrical Rating (Net We): 514(oc) 504 Tec) | |||
: 6. Maximum Dependable Capacity (Gross We): 535 | |||
: 7. Maximum Dependable Capacity (Net We): 504 | |||
: 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7)Since Last Report, Give Reasonse | |||
: 9. Power Level to Which Restricted,If Any(Net We): | |||
: 10. R:asons For Restrictions, If Any: | |||
This Month Yr-to-Date Cumulative | |||
: 11. Hours In Reporting Period 744.00 8760.00 - - - | |||
651.42 7542.37 65,078.15 | |||
: 12. Number Of Hours Reactor Was Critical 0.00 0.00 0.00 | |||
: 13. R: actor Reserve Shutdown Hours 576.73 63,011.19 | |||
: 14. Hours Generator On-Line 7409.61 | |||
: 15. Unit Reserve Shutdown Hours 0.00 0.00 0.00 | |||
: 16. Gross Thermal Energy Generated (MWH) 806,141.50 11.312,243.50 89.915,760.50 | |||
: 17. Gross Electrical Energy Generated (MWH) 267,155.00 3,759,124.00 29.871.971.00 | |||
: 18. Nat Electrical Energy Generated (MWH) 256,031.00 t 568.707.00 28,316,286.00 | |||
: 19. Unit Service Factor 77;.52 84.58 77.47 | |||
: 20. Unit Availability Factor 77.52 84.58 77.47 68.28 80.83 69.07 | |||
: 21. Unit Capacity Factor (Using MDC Net) 66.95 79.26 67.73 | |||
: 22. Unit Capacity Factor (Using DER Net) 15.95 2.78 6.80 | |||
: 23. Unit Forced Outage Rate | |||
: 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: - | |||
: 26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY \. | |||
INITIAL ELECTRICITY COMMERCIAL OPERATION | |||
AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger g pgggg (802) 257-7711 Ext 137 MONTH December 1981 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) | |||
: 1. 0 17. 518 | |||
: 2. 0 18. 518 | |||
: 3. 28 19. 519 4, 61 20. 497 | |||
: 5. 29 21. 519 | |||
: 6. o 22. 520 | |||
: 7. 82 23. 520 | |||
: 8. 29s 24. 482 | |||
: 9. 3s2 25. 520 | |||
: 10. 396 26. 482 11, 481 27. 0 | |||
^ | |||
517 28. 70 12. | |||
: 13. 511 29 : 365 | |||
: 14. 518 30. 398 | |||
: 15. 518 31. 488 | |||
: 16. 518 INSTRUCTIONS: | |||
On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt. | |||
't | |||
UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTH December 1981 COMPLETE B J Burger TELEPHONE _(802) 257-7711 ext 137 l | |||
1 of 2 m i | |||
$oE N Y Ef o y Cause & Corrective No. Date j ;jy g ;jg License ge | |||
* Action to H $ R port # 0 "*O n g u E | |||
81-19 811016 S 57.80 C N/A N/A ZZ ZZ Refueling outage in progress (cont) 81-20 813203 F 17.38 A N/A N/A HA TURBIN Turbine rotor out of balance. Rebalanced rotor. | |||
81-21 811205 F 56.90 A 2 N/A CB PUMPXX Shutdown to replace degraded reactor recirc - | |||
r: culation pump seal. | |||
81-22 811209 S 0 B 4 N/A RB CONROD Power reduction for control rod pattern (Power adjustment. | |||
Reduct) 81-23 811220 S 0 B 4 N/A HA TURBIN Power reduction for main turbine and control (Power RB CONROD rod surveillance Reduct) | |||
F: For[ed Reason: Method: Exhibit G- Instructions S Sdheduled A-Equipment Failure (Explain) , | |||
1- Manual' for Preparation of Data B-Maintenance or Test 2- Manual Scram Entry Sheets for Licensee C-Refuelingx 3- Automatic Scram Event Report (LER) File D-Regulatory Restriction 4- Other (Explain) (NUREG 0161) | |||
E-Operator Training & License Examination F-Administrative 5 Exhibit I -_Same Source-G-Operational Error (Explain) | |||
H-Other (Explain) n/rra | |||
UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTH December 1981 DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 13/ | |||
2 A cm u Eu u N@. Date is ME "c dO License En ause & Corrective E. NE E l$ U E Event E E$ " " | |||
$2 $23 o | |||
E M | |||
fS$ | |||
em Report # E,0 m E"' O | |||
% g U S | |||
81-24 811224 F 0 A 4 N/A HG DEMINX Power reduction to precoat the "C" conden-(Power sate demineralizer. Spare demineralizer Reduct) already out of service 81-25 811226 F 35.18 A 3 N/A HB MECFUN Main turbine pressure regulator failed resulting in a high flux scram. Fail-ure caused by sticky mechanical linkage which was cleaned, lubricated, and adjustec . | |||
81-26 811230 S 0 B 4 N/A RB CONROD Power reduction for a control rod pattern (Power CB PUMPXX adjustment and maintenance of the "B" Reduct) reactor recirculation pump speed control circuit. | |||
1 2 3 4 F: Fogced Reason: Method: Exhibit G- Instructions S: Scheduled A-Equipment Failure (Explain) 1- Manual for Preparation of Data ' | |||
l B-Maintenance or Test , 2- Manual Scram Entry Sheets for Licensee C-Refueling 3- Automatic Scram Event Report (LER) File D-Regulatory Restriction 4- Other (Explain) (NUREG 0161) l E-Operator Training & License Examination I | |||
F-Administrative ~, | |||
Exhibit I - Same Source i | |||
G-Operational Error (Explain) | |||
H-Other (Explain) 7/80 | |||
DOCKET No. 50-271 - | |||
UNIT Vermont Yankee ,, | |||
DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802)257-7711 Ext 137 SAFETY RELATED MAINTENANCE 1 of 3 NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION UPS System Alarms Corrective N/A Incorrect Wiring at Wrong Alarms Corrected Wiring Errors MR 79-0873 Annunciator Panel Annuciate CAD Isolation Valve Corrective N/A Dirt Valve Would Not Disasssabled and Cleaned FSO 109-75-D1 MR 81-0853 Shut Valve Rscirc Sample Valve, Corrective N/A Loose Clevis Hanger Not Sup- Tightened and Anchored FCU-40, Hanger MR 81-1217 porting Valve Clevis to Valve RWCU Valve V12-32B Corrective N/A Worn Packing Leakage Tightened Packing - | |||
MR 81-1456 , | |||
RWCU Ragenerative Heat Ex- Corrective N/A Unknown Leakage Plugged Leak Off chtngs E-15-lC MR 81-1458 ' | |||
lInterConnectingPiping Canatruction Leak Off RHR Hast Exchanger- N/A Worn Gasket Leakage Replaced Gasket E-14-1B l Corrective MR 81-1459 | |||
.! ! Replaced Breaker Cora Spray Valve V14-11A Corrective LER 81-35/3L Fault / Breaker Breaker Tripped Mstor Operator Breaker MR 81-1460 - | |||
During Operatior N | |||
Drywell Pressure Indicator Corrective ' N/A Failed Amplifier Erroneous Readiog Replaced Amplifier PI-16-19-12A MR 81-1468 l | |||
l g- | |||
DOCKET NO. 50-271 - | |||
UNIT Vcra:nt Ycnkte , | |||
DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 137 SAFETY RELATED MAINTENANCE 2 | |||
NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION R::ctor Recirculation Pump Corrective N/A Faulty Mechanical High Seal Temp- Rebuilt seal P18-1A MR 81-1470 Seal erature Drywell Personnel Access Corrective N/A Failed G asket Air Leakage Replaced Gasket Hitch Outer Door MR 81-1475 R::ctor Building Personnel Corrective N/A Loose Seal Air Leakage Adjusted Seal, Calked Air L ck Outer Door MR 81-1485 Door Casing S rvice Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing. | |||
P7-1B MR 81-1490 S:rvice Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing P7-lD l-01 81-1491 Recctor Recirc Valves Corrective N/A Worn Packing Leakage Adjusted Packing V2-304A-C and V2-98A, Main MR 81-1498 Stera Valves V60-72B-F and 11 | |||
/ | |||
RHR H ng$r H-192 Bolting Corrective N/A Construction Worn threads, Replaced Bolting j MR 81-1521 - Minimal Thread i Engagement RHR Service Water Valve Corrective N/A Worn Packing Leakage Adjusted Packing V70-89B MR 81-1530 i- _ | |||
DOCKET NO. 50-271 . | |||
UNIT Vernont Yenk2e DATE 820112 COMPLETED BY F.J. Burger TELEFi!ONE (802) 257-7711 ext 137 SAFETY RELATED MAINTENANCE 3 | |||
NATURE OF MALFUNCTION ER OR OUTAGg MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION EQUIPMENT SLC Velve V11-25 Corrective N/A Corroded Seat Valve Leakage- Lapped Seating Surfaces MR 81-1572 Smrvics Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing T7-1C MR 81-1582 RWCU Vsive V12-19B Corrective N/A Worn Packing Leakage Adjusted Packing MR 81-1604 RilR Service Water Pump Corrective LER 81-37/3L Worn Bushings Breaker Trips Replaced B2shings-P8-1A Circuit Breaker MR 81-1612 Upon Pump Start e* | |||
1 - | |||
l | |||
! i | |||
DOC".ET No. 50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 137 REPORT MONTH December 1981 | |||
==SUMMARY== | |||
OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 68.02% of rated thermal power for the month. | |||
Gross electrical generation was 267,155 MWH, or66.50% of design electrical capacity. | |||
Operating Summary The following is a chronological description of plant operations including other pertinent items of interest for the month: | |||
12/1/81 At the beginning of the reporting period the plant was shut down for refueling. | |||
At 1949 hours a reactor start up was initiated. | |||
12/3/81 At 2010 hours, after completing main turbine overspeed testing, the main turbine was shut down for rotor balancing. | |||
12/4/81 At 1333 hours the main turbine was phased into the grid. | |||
12/5/81 At 0220 hours a reactor shutdown was initiated to replace a degraded seal in the "A" reactor recirculation pump. | |||
12/7/81 At 0152 hours a reactor start up and power ascension was initiated 12/9/81 At 1300 hours a power reduction was initiated for a control rod pattern adjustment. , | |||
At 1730 hours a return to full power initiated. | |||
12/20/81 At 0200 hours a power reduction was initiated for control rod and main turbine surveillance testing. | |||
At 0600 hours a return to full power was initiated. | |||
12/24/81 At 0100 hours a power reduction was initiated to remove the "C" condensate demineralizer from service for precoating. The sparc demineralizer was already out of service. | |||
At 0610. hours a return to full power was initiated. | |||
12/26/81 At 1944 hours the plant was shutdown by a , reactor high flux scram caused by a faulty main turbine pressure regulator. | |||
\ | |||
12/27/81 At 2035 hours a reactor start up and return to full power,was initiated. | |||
o '. | |||
Operating Summary (continued) I 12/30/81 At 0900 hours a power reduction was initiated for a control rod pattern adjustment and maintenance of the "B" reactor recirculation pump speed centrol circuit. | |||
At 1030 hours a return to full power was initiated. | |||
12/31/81 At the end of the reporting period the plant was operating at 99.7% of rated thermal power. | |||
t j | |||
', / | |||
i i | |||
i l | |||
i | |||
. . _ . . ._.._%}} |
Latest revision as of 01:24, 6 January 2021
ML20066C538 | |
Person / Time | |
---|---|
Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
Issue date: | 01/12/1982 |
From: | Burger F VERMONT YANKEE NUCLEAR POWER CORP. |
To: | |
Shared Package | |
ML20066C532 | List: |
References | |
NUDOCS 8211100027 | |
Download: ML20066C538 (10) | |
Text
. . -.
1 i
k VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 81-12 FOR THE MONTH OF DECEMBER, 1981 1
l i
i ,'
i f .
J +
r 8211100027 820112 PDR ADOCK 05000271 R pop
OPERATING DATA REPORT DOCKET NO. 50-271 DATE 820112 COMPLETED BY F. J. Burger TELEPHONE (802)257-7711 Ext 137 OPERATING STATUS r
' Notes
- 1. Unit Name: Vermont Yankee
- 2. R porting Period: Dect.mber 1981
- 3. Licensed Thermal Power (int): 1593
- 4. Ntmeplate Rating (Gross We): 540
- 5. Design Electrical Rating (Net We): 514(oc) 504 Tec)
- 6. Maximum Dependable Capacity (Gross We): 535
- 7. Maximum Dependable Capacity (Net We): 504
- 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7)Since Last Report, Give Reasonse
- 9. Power Level to Which Restricted,If Any(Net We):
- 10. R:asons For Restrictions, If Any:
This Month Yr-to-Date Cumulative
- 11. Hours In Reporting Period 744.00 8760.00 - - -
651.42 7542.37 65,078.15
- 12. Number Of Hours Reactor Was Critical 0.00 0.00 0.00
- 13. R: actor Reserve Shutdown Hours 576.73 63,011.19
- 14. Hours Generator On-Line 7409.61
- 15. Unit Reserve Shutdown Hours 0.00 0.00 0.00
- 16. Gross Thermal Energy Generated (MWH) 806,141.50 11.312,243.50 89.915,760.50
- 17. Gross Electrical Energy Generated (MWH) 267,155.00 3,759,124.00 29.871.971.00
- 18. Nat Electrical Energy Generated (MWH) 256,031.00 t 568.707.00 28,316,286.00
- 19. Unit Service Factor 77;.52 84.58 77.47
- 20. Unit Availability Factor 77.52 84.58 77.47 68.28 80.83 69.07
- 21. Unit Capacity Factor (Using MDC Net) 66.95 79.26 67.73
- 22. Unit Capacity Factor (Using DER Net) 15.95 2.78 6.80
- 23. Unit Forced Outage Rate
- 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: -
- 26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY \.
INITIAL ELECTRICITY COMMERCIAL OPERATION
AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger g pgggg (802) 257-7711 Ext 137 MONTH December 1981 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net)
- 1. 0 17. 518
- 2. 0 18. 518
- 3. 28 19. 519 4, 61 20. 497
- 5. 29 21. 519
- 6. o 22. 520
- 7. 82 23. 520
- 8. 29s 24. 482
- 9. 3s2 25. 520
- 10. 396 26. 482 11, 481 27. 0
^
517 28. 70 12.
- 13. 511 29 : 365
- 14. 518 30. 398
- 15. 518 31. 488
- 16. 518 INSTRUCTIONS:
On this format, list the average daily unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.
't
UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTH December 1981 COMPLETE B J Burger TELEPHONE _(802) 257-7711 ext 137 l
1 of 2 m i
$oE N Y Ef o y Cause & Corrective No. Date j ;jy g ;jg License ge
- Action to H $ R port # 0 "*O n g u E
81-19 811016 S 57.80 C N/A N/A ZZ ZZ Refueling outage in progress (cont) 81-20 813203 F 17.38 A N/A N/A HA TURBIN Turbine rotor out of balance. Rebalanced rotor.
81-21 811205 F 56.90 A 2 N/A CB PUMPXX Shutdown to replace degraded reactor recirc -
r: culation pump seal.
81-22 811209 S 0 B 4 N/A RB CONROD Power reduction for control rod pattern (Power adjustment.
Reduct) 81-23 811220 S 0 B 4 N/A HA TURBIN Power reduction for main turbine and control (Power RB CONROD rod surveillance Reduct)
F: For[ed Reason: Method: Exhibit G- Instructions S Sdheduled A-Equipment Failure (Explain) ,
1- Manual' for Preparation of Data B-Maintenance or Test 2- Manual Scram Entry Sheets for Licensee C-Refuelingx 3- Automatic Scram Event Report (LER) File D-Regulatory Restriction 4- Other (Explain) (NUREG 0161)
E-Operator Training & License Examination F-Administrative 5 Exhibit I -_Same Source-G-Operational Error (Explain)
H-Other (Explain) n/rra
UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTH December 1981 DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 13/
2 A cm u Eu u N@. Date is ME "c dO License En ause & Corrective E. NE E l$ U E Event E E$ " "
$2 $23 o
E M
fS$
em Report # E,0 m E"' O
% g U S
81-24 811224 F 0 A 4 N/A HG DEMINX Power reduction to precoat the "C" conden-(Power sate demineralizer. Spare demineralizer Reduct) already out of service 81-25 811226 F 35.18 A 3 N/A HB MECFUN Main turbine pressure regulator failed resulting in a high flux scram. Fail-ure caused by sticky mechanical linkage which was cleaned, lubricated, and adjustec .
81-26 811230 S 0 B 4 N/A RB CONROD Power reduction for a control rod pattern (Power CB PUMPXX adjustment and maintenance of the "B" Reduct) reactor recirculation pump speed control circuit.
1 2 3 4 F: Fogced Reason: Method: Exhibit G- Instructions S: Scheduled A-Equipment Failure (Explain) 1- Manual for Preparation of Data '
l B-Maintenance or Test , 2- Manual Scram Entry Sheets for Licensee C-Refueling 3- Automatic Scram Event Report (LER) File D-Regulatory Restriction 4- Other (Explain) (NUREG 0161) l E-Operator Training & License Examination I
F-Administrative ~,
Exhibit I - Same Source i
G-Operational Error (Explain)
H-Other (Explain) 7/80
DOCKET No. 50-271 -
UNIT Vermont Yankee ,,
DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802)257-7711 Ext 137 SAFETY RELATED MAINTENANCE 1 of 3 NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION UPS System Alarms Corrective N/A Incorrect Wiring at Wrong Alarms Corrected Wiring Errors MR 79-0873 Annunciator Panel Annuciate CAD Isolation Valve Corrective N/A Dirt Valve Would Not Disasssabled and Cleaned FSO 109-75-D1 MR 81-0853 Shut Valve Rscirc Sample Valve, Corrective N/A Loose Clevis Hanger Not Sup- Tightened and Anchored FCU-40, Hanger MR 81-1217 porting Valve Clevis to Valve RWCU Valve V12-32B Corrective N/A Worn Packing Leakage Tightened Packing -
MR 81-1456 ,
RWCU Ragenerative Heat Ex- Corrective N/A Unknown Leakage Plugged Leak Off chtngs E-15-lC MR 81-1458 '
lInterConnectingPiping Canatruction Leak Off RHR Hast Exchanger- N/A Worn Gasket Leakage Replaced Gasket E-14-1B l Corrective MR 81-1459
.! ! Replaced Breaker Cora Spray Valve V14-11A Corrective LER 81-35/3L Fault / Breaker Breaker Tripped Mstor Operator Breaker MR 81-1460 -
During Operatior N
Drywell Pressure Indicator Corrective ' N/A Failed Amplifier Erroneous Readiog Replaced Amplifier PI-16-19-12A MR 81-1468 l
l g-
DOCKET NO. 50-271 -
UNIT Vcra:nt Ycnkte ,
DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 137 SAFETY RELATED MAINTENANCE 2
NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION R::ctor Recirculation Pump Corrective N/A Faulty Mechanical High Seal Temp- Rebuilt seal P18-1A MR 81-1470 Seal erature Drywell Personnel Access Corrective N/A Failed G asket Air Leakage Replaced Gasket Hitch Outer Door MR 81-1475 R::ctor Building Personnel Corrective N/A Loose Seal Air Leakage Adjusted Seal, Calked Air L ck Outer Door MR 81-1485 Door Casing S rvice Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing.
P7-1B MR 81-1490 S:rvice Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing P7-lD l-01 81-1491 Recctor Recirc Valves Corrective N/A Worn Packing Leakage Adjusted Packing V2-304A-C and V2-98A, Main MR 81-1498 Stera Valves V60-72B-F and 11
/
RHR H ng$r H-192 Bolting Corrective N/A Construction Worn threads, Replaced Bolting j MR 81-1521 - Minimal Thread i Engagement RHR Service Water Valve Corrective N/A Worn Packing Leakage Adjusted Packing V70-89B MR 81-1530 i- _
DOCKET NO. 50-271 .
UNIT Vernont Yenk2e DATE 820112 COMPLETED BY F.J. Burger TELEFi!ONE (802) 257-7711 ext 137 SAFETY RELATED MAINTENANCE 3
NATURE OF MALFUNCTION ER OR OUTAGg MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION EQUIPMENT SLC Velve V11-25 Corrective N/A Corroded Seat Valve Leakage- Lapped Seating Surfaces MR 81-1572 Smrvics Water Pump Corrective N/A Worn Packing Leakage Adjusted Packing T7-1C MR 81-1582 RWCU Vsive V12-19B Corrective N/A Worn Packing Leakage Adjusted Packing MR 81-1604 RilR Service Water Pump Corrective LER 81-37/3L Worn Bushings Breaker Trips Replaced B2shings-P8-1A Circuit Breaker MR 81-1612 Upon Pump Start e*
1 -
l
! i
DOC".ET No. 50-271 UNIT Vermont Yankee DATE 820112 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext 137 REPORT MONTH December 1981
SUMMARY
OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 68.02% of rated thermal power for the month.
Gross electrical generation was 267,155 MWH, or66.50% of design electrical capacity.
Operating Summary The following is a chronological description of plant operations including other pertinent items of interest for the month:
12/1/81 At the beginning of the reporting period the plant was shut down for refueling.
At 1949 hours0.0226 days <br />0.541 hours <br />0.00322 weeks <br />7.415945e-4 months <br /> a reactor start up was initiated.
12/3/81 At 2010 hours0.0233 days <br />0.558 hours <br />0.00332 weeks <br />7.64805e-4 months <br />, after completing main turbine overspeed testing, the main turbine was shut down for rotor balancing.
12/4/81 At 1333 hours0.0154 days <br />0.37 hours <br />0.0022 weeks <br />5.072065e-4 months <br /> the main turbine was phased into the grid.
12/5/81 At 0220 hours0.00255 days <br />0.0611 hours <br />3.637566e-4 weeks <br />8.371e-5 months <br /> a reactor shutdown was initiated to replace a degraded seal in the "A" reactor recirculation pump.
12/7/81 At 0152 hours0.00176 days <br />0.0422 hours <br />2.513228e-4 weeks <br />5.7836e-5 months <br /> a reactor start up and power ascension was initiated 12/9/81 At 1300 hours0.015 days <br />0.361 hours <br />0.00215 weeks <br />4.9465e-4 months <br /> a power reduction was initiated for a control rod pattern adjustment. ,
At 1730 hours0.02 days <br />0.481 hours <br />0.00286 weeks <br />6.58265e-4 months <br /> a return to full power initiated.
12/20/81 At 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br /> a power reduction was initiated for control rod and main turbine surveillance testing.
At 0600 hours0.00694 days <br />0.167 hours <br />9.920635e-4 weeks <br />2.283e-4 months <br /> a return to full power was initiated.
12/24/81 At 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br /> a power reduction was initiated to remove the "C" condensate demineralizer from service for precoating. The sparc demineralizer was already out of service.
At 0610. hours a return to full power was initiated.
12/26/81 At 1944 hours0.0225 days <br />0.54 hours <br />0.00321 weeks <br />7.39692e-4 months <br /> the plant was shutdown by a , reactor high flux scram caused by a faulty main turbine pressure regulator.
\
12/27/81 At 2035 hours0.0236 days <br />0.565 hours <br />0.00336 weeks <br />7.743175e-4 months <br /> a reactor start up and return to full power,was initiated.
o '.
Operating Summary (continued) I 12/30/81 At 0900 hours0.0104 days <br />0.25 hours <br />0.00149 weeks <br />3.4245e-4 months <br /> a power reduction was initiated for a control rod pattern adjustment and maintenance of the "B" reactor recirculation pump speed centrol circuit.
At 1030 hours0.0119 days <br />0.286 hours <br />0.0017 weeks <br />3.91915e-4 months <br /> a return to full power was initiated.
12/31/81 At the end of the reporting period the plant was operating at 99.7% of rated thermal power.
t j
', /
i i
i l
i
. . _ . . ._.._%