ML20024F031

Monthly Operating Repts for Jul 1983.W/830815 Ltr

ML20024F031
Person / Time
Site:	North Anna
Issue date:	08/02/1983
From:	Schmitendorf, Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Haller N NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
469, NUDOCS 8309080135
Download: ML20024F031 (15)

Text

C VIRGINIA ELECTHIC AND POwnN COMPANY RicnwoNn,VrnoINIA 23261 w.L.stswier w[cS*[dEUn'UrEn. August 15,1983 Mr. N. M. Haller, Director Serial No. 469 Office of Management and Program Analysis N0/JHL:acm U. S. Nuclear Regulatory Commission Docket Nos. 50-338 Washington, D. C. 20555 50-339 License Nos. NPF-4 NPF-7

Dear Mr. Haller:

Enclosed is the Monthly Operating Report for North Anna Power Statien . Unit Nos. I and 2 for the month of July, 1983.

Very truly yours, 7

JL '.f W. L. Stewart Enclosure (3 copies) cc: Mr. R. C. DeYoung, Directo,r (12 copies)

Office of Inspection and Enforcement Mr. James P. O'Reilly (1 copy)

Regional Administrator Region II Mr. M. B. Shymlock NRC Resident Inspector North Anna Power Station 8309080135 830802 PDR ADOCK 05000338PDR R

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.w-VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH July YEAR 1983 I

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F OPERATING DATA REPORT DOCKET NO. 50-338 DATE 08-02-83 COMPLETED BY G. D. Schmitendorf TELEPHONE (703) 894-5151 X2502 OPERATING STATUS Notes

1. Unit Name: North Anna 1

2. Reporting Period: July 1983

3. Licensed Thermal Power (MWt): 2775

4. Nameplate Rating (Gross MWe): 947

5. Design Electrical Rating (Net MWe): 907

6. Naximum Dependable Capacity (Gross MWe): 930

7. Maximum Dependable Capacity (Net MWe): 877

8. If Changes Occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report, Give Reasons:

N/A

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 744 5,087 45,168

12. Number of Hours Reactor Was Critical 708.9 3,360.5 30,483.5

13. Reactor Reserve Shutdown Hours 35.1 1,726.5 2,980.6

14. Hours Generator On-Line 697.3 3,198.3 29,580.5

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWH) 1,846,960 8,447,334 76,707,688

17. Gross Electrical Energy Generated (MWH) 614,160 2,821,055 24,605,587

18. Net Electrical Energy Generated (MWH) 581,796 2,673,780 23,194,513

19. Unit Service Factor 93.7 62.9 65.5

20. Unit Availability Factor 93.7 62.9 65.5

21. Unit Capacity Factor (Using MDC Net) 89.2 59.9 58.6

22. Unit Capacity Factor (Using DER Net) 86.2 58.0 56.6

23. Unit Forced Outage Rate 6.3 37.1 11.8

24. Shutdowns Scheduled over Next 6 Months (Type, Date, and Duration of Each):

Scheduled Maintenance, 10-07-83, 10 Days

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

i .

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-338 UNIT NAME North Anna 1 DATE 08-02-83 REPORT MONTH July COMPLETED BY G. D. Schmitendorf TELEPHONE (703) 894-5151 X2502 l

Ns. Date Type Duration Reason Method of Licensee System Component Cause & Corrective (Hours) Shutting 3

d' 4 Code Action to 5

Down Reactor Report # Prevent Recurrence 83-05 830710 F 23.8 A 2 NA NA NA Gland Steam Condenser tube leaks. Commenced rampdown to off-line; Conditions required a manual trip of turbine and reactor during rampdown. Repairs were made and the unit returned to on-line.

83-06 830723 F 22.9 A 1 NA NA NA Gland Steam Condenser tube 4 leaks. Commenced rampdown to off-line. A normal reactor shutdown was completed.

Repairs were made and the unit

returned to on-line.

i 1 2 3 4 1 F: Forced Reason: Method: Exhibit F - Instructions

S

Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data i

B-Maintenance or Test 2-Manual Scram. Entry Sheets for Licensee l C-Refueling 3-Automatic Scram Event Report (LER) File

D-Regulatory Restriction 4-Continuations (NUREG-0161)

E-Operator Training & License Examination 5-Load Reduction F-Administrative 9-Other 5 G-Operational Error (Explain)

).

H-Other (Explain) Exbibit H - Same Source

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l AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-338 UNIT NA-1 DATE 08-02-83 COMPLETED BY G. Schmitendorf TELEPHONE 703-894-5151X2502 MONTH July DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 867 17 871 2 867 18 869 3 883 19 870 4 883 20 871 5 883 21 870 6 883 22 868 7 883 23 479 8 880 24 131 9 877 25 735 10 688 26 880 11 44 27 881 12 356 28 882 13 816 29 882 14 870 30 870 15 867 31 867 16 865 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.

Page 1 of 1 UNIT SHUTDOWN AND POWER REDUCTIONS EXPLANATION SHEET DOCKET NO. 50-338 REPORT MONTH July UNIT NAME NA-1 YEAR 1983 DATE 08-02-83 COMPLETED BY G. D. Schmitendorf 83-05 (A) (2) At 1840 on July 10, 1983, a rampdown of Unit I from 100%

power was commenced due to a tube leak in the Gland Steam Condenser. At 1842 the Turbine and Reactor were manually tripped, from approximately 90% power due to an increasing leak rate from the suspected tube rupture.

The unit was stabilized in Mode 3 (Hot Standby) while the necessary repairs to the Gland Steam Condenser were made.

The repairs were completed and the Unit returned to on-line at 1829 on July 11, 1983.

83-06 (A) (1) At 1230 on July 23, 1983, a rampdown of Unit I from 100%

power was commenced due to a tube leak in the Gland Steam Condenser. The generator was taken off-line at 1417 and a reactor shutdown commenced at 1425 on July 23, 1983.

The reactor shutdown was completed at 1440 on July 23,1983. The unit was stabilized in Mode 3 (Hot Standby) while the necessary repairs to the Gland Steam Condenser were made. The repairs were completed and the Unit returned to on-line at 1308 on July 24, 1983.

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VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNIT NO. 1 MONTH July

SUMMARY

OF OPERATING EXPERIENCE Listed below in chronological sequence is a summary of operating experidaces for this month which required load reductions or resulted in significant non-load related incidents.

July 1, 1983 0000 This month begins with the unit stable at 100% power.

July 10, 1840 Commenced Unit rampdown to off-line due to Gland Steam Condenser tube leak.

1842 Manually tripped the Turbine and Reactor due to water spraying out of condenser.

July 11, 1600 Commenced Reactor Start-up.

1645 Reactor critical.

1829 Generator on-line.

2235 Unit stabilized at 30% power for secondary chemistry hold.

July 12, 0818 Released from secondary chemistry hold.

Commenced increasing power (limited to 3%/hr).

July 13, 0942 Unit stable at 100% power.

July 23, 1230 Commenced Unit rampdown to off-line due to Gland Steam Condenser tube leak.

1417 Generator off-line.

1425 Commenced Reactor Shutdown.

1440 Reactor Shutdown completed. ,

July 24 0257 Commenced Reactor Start-up.

0322 Reactor critical.

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1308 Generator on-line.

1411 Unit stabilized at 30% power for secondary chemistry hold.

1615 Released from secondary chemistry hold.

Commenced increasing power (limited to 3%/hr).

July 25 1545 Unit stable at 100% power.

July 31 2400 This month ends with the unit stable at 100% power.

2

OPERATING DATA REPORT DOCKET NO. 50-339 _

DATE 08-02-83 COMPLETED BY G. D. Schmitendorf TELEPHONE (703) 894-5151 X2502 OPERATING STATUS Notes

1. Unit Name: North Anna 2

2. Reporting Period: July 1983

3. Licensed 1hermal Power (MWt): 2775

4. Nameplate Rating (Gross MWe): 947

5. Design Electrical Rating (Net NWe): 907

6. Maximum Dependable Capacity (Gross MWe): 939

7. Maximum Dependable Capacity (Net MWe): 890

8. If Changes Occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report, Give Reasons:

N/A

9. Power Level To Which Restricted, If Any (Net MWe): N/A

10. Reasons For Restrictions, If Any: N/A This Month Yr.-to-Dete Cumulative

11. Hours In Reporting Period 744 5,087 23,039

12. Number of Hours Reactor Was Critical 722.2 3,492.2 15,995.3

13. Reactor Reserve Shutdown Hours 7.4 1,753.9 3,008

14. Hours Generator On-Line 712.1 3,409.4 15,862.1

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWH) 1,957,664 8,694,688 40,420,708

17. Gross Electrical Energy Generated (MWH) 638,605 2,832,629 13,421,942

18. Net Electrical Energy Generated (MWH) 604,940 2,679,062 12,728,680

19. Unit Service Factor 95.7 67.0 68.8

20. Unit Availability Factor 95.7 67.0 68.8

21. Unit Capacity Factor (Using MDC Net) 91.4 59.2 62.1

22. Unit Capacity Factor (Using DER Net) 89.6 58.1 60.9

23. Unit Forced Outage Rate 4.3 8.0 17.7

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Scheduled Maintenance, 11-18-83, 10 Days

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 k

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-339 UNIT NAME North Anna 2 DATE 08-02-83 REPORT MONTH July COMPLETED BY G. D. Schmitendorf TELEPHONE (703) 894-5151 X2502_

Type Duration Reason2 l

No. Date Method of Licensee System Component Cause & Corrective (Hours) Shutting "*"' Code Action to Down Reactor3 Report # *4 5 Prevent Recurrence 83-12 830717 F 7.8 A 3 059 EB GENERA Loss of Vital Bus 2-I due to blown fuse on Vital Bus 2-I inverter. Reactor trip / turbine trip from 100% power. Repairs and check-outs of equipment completed. Unit returned to on-line.

83-13 830730 F 19.3 A 1 062 CB VALVEX Excessive Primary Plant leak rate (unidentified). Unit rampdown to off-line followed by normal reactor shutdown. Cause of the excessive leakage was determined and necessary repairs made.

Unit returned to on-line.

83-14 830731 F 4.8 A 3 NA NA NA High-High level "D" MSR turbine /

reactor trip caused by malfunct-ion of "C" HP Heater Drain Tank high level divert valve. The problem was investigated, resolved, and unit returned to on-line.

I 2 3 4.

F: Forced Reason: Method: Exhibit F - Instructions S: 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 Restriction 4-Continuations (NUREG-0161)

E-Operator Training & License Examination 5-Load Reduction F-Administrative 9-Other 5

G-Operational Error (Explain)

H-Other (Explain) Exhibit H - Same Source

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-339 UNIT NA-2 DATE 08-02-83 _

COMPLETED BY G. Schmitendor TELEPHONE 703-894-5151X2502 MONTH July DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 862 17 534 2 865 18 656 3 859 19 875 4

4 863 20 874 5 859 21 875 6 862 22 875 7 866 23 870 8 858 24 865 9 850 25 866 10 871 26 864 11 869 27 866 12 869 28 867 13 869 29 854 14 877 30 40 15 875 31 576 16 373 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.

Page 1 of 1 UNIT SHUTDCW AND POWER REDUCTIONS EXPLANATION SHEET DOCKET NO. 50-339 REPORT MONTH July UNIT NAME NA-2 YEAR 1983 DATE 08-02-83 COMPLETED BY G. D. Schmitendorf 83-12 (A) (3) At 1418 on July 17, 1983, with Unit 2 stable at 100%

power, a Reactor / Turbine trip occurred due to a loss of Vital Bus 2-I. The loss of the Vital Bus was due to a blown fuse on Vital Bus 2-I Inverter. The Reactor Trip signal was "A" Reactor Coolant Pump breaker open, coincident with P-8 (> 30% power). The Reactor Coolant Pump breaker never opened; however, the relay used to sense the breaker position is powered by Vital Bus 2-I and fails to the safe (tripped) condition. The Vital Bus was restored from the alternate power source within several minutes of the unit trip. The Unit was stabilized in Mode 3 (Hot Standby) while repairs to the Vital Bus 2-I Inverter were made. The necessary repairs were completed and the unit returned to on-line at 2208 on July 17, 1983.

83-13 (A) (1) At 2157 on July 29, 1983, a rampdown of Unit 2 from 100%

power was commenced due to a greater than allowed Primary l Plant Leak Rate (unidentified). The unit was taken l off-line at 0158 on July 30, 1983; followed by a normal

! Reactor Shutdown. The Reactor Shutdown was completed at 0224 on July 30, 1983. The exceaaive leakage was found to be from the valve stem leak-off line of MOV-2585. The packing of MOV-2585 was replaced. The Primary Plant Leak rate was reduced and the Unit returned to on-line at 2116 on July 30, 1983.

83-14 (A) (3) At 0142 on July 31, 1983, with the unit at approximately i 60% power and a ramp-up to 100% power following a release

! from a secondary plant chemistry hold in progress, a Turbine / Reactor Trip occurred. The trip signal was l

High-High Level "D" MSR (one minute time delay) tu~rbine trip. The high level was due to a malfunction of the "C" High Pressure Heater Drain Tank high level divert valve.

The problem with the level control was investigated, resolved, and the Unit was returned to on-line at 0620 on July 31, 1983.

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VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNIT NO. 2 MONTH July

SUMMARY

OF OPERATING EXPERIENCE Listed below in chronological sequence is a summary of operating experiences for this month which required load reductions or resulted in significant non-load related incidents.

July 1, 1983 0000 This month begins with the unit stable at 100% power.

July 8, 0302 Commenced unit rampdown as per System Operator for load following.

0331 Unit stabilized at 825MW as per System Operator.

0500 Commenced unit ramp-up as per System Operator.

0730 Unit stabilized at 100% power.

July 9, 0314 Commenced unit rampdown as power System Operator for load following.

0414 Unit stabilized at 800 MW as per System Operator.

0615 Commenced unit ramp-up as per System Operator 0741 Unit stabilized at 100% power.

July 17, 1420 Reactor Trip. The trip was due to loss of Vital Bus 2-I caused by a blown fuse in Vital Bus 2-I Inverter.

1422 Vital Bus 2-I energized via alternate power source. _

1816 Commenced Reactor Start-up.

1908 Reactor critical 2208 Generator on-line.

1

1 July 18, 0000 Unit stabilized at ?D% power for secondary chemistry hold.

0528- Released from secondary chemistry hold.

.Comenced increasing power.

1111 Unit' stable at 100% pcuer.

4 July 29, 2157 Com.nenced Unit rampdown to off-line due to Primary Plant leak rate (unidentified),

greater th4n' allowable.

July 30, 0158 Generator off-line. ,

0212 Commenced Reactor Shutdova.

0224 Reactor Shutdown coppleted.

1342 Couunenced Reactor Start-up.

1405 Reactor Critical.

1645 Reactor Trip. The trip was due to a First Stage Pressure spike while transferring from throttle valve to governor valve control of the turbine.

1715 Commenced Reactor Start-up.

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1857 Reactor Trip. The trip was due to a First

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Stage Pressure spike while transferring from throttle valve to governor valve control of the turbine.

1915 Conmenced Reacter start-up.

1947 Reactor Critical.

I i 2116 GenEratoron-line.

2205 Unit stabilized at 30% power for secondary chemistry # hold.

July 31, 0035 Released from secondary chemistry hold.

Commenced increasing ~ power. ,

l 0142 Reactor trip. The trip was due to High-High Level "D" MSR caused by a malfunction of "C" High Pressure Heater Drain Tank high level divert valve. The unit was at approximately

. 60% power at the time of the trip.

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_ 0358 Commenced Reactor Start-up.

iN , ___ 0420 Reactor Critical.

0628 Generator s on-line.

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. 0645 Secondary chemistry is within specifications, no chemistry hold id'necessary. Commence ramp-up to 100% power.

1215 Unit stable at 100% power.

2400 This' month ends with the unit stable at

+ 100% power.

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