ML20070R002

Monthly Operating Repts for Apr 1994 for North Anna Power Station Units 1 & 2

ML20070R002
Person / Time
Site:	North Anna
Issue date:	04/30/1994
From:	Bowling M, Stall J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
94-305, NUDOCS 9405190343
Download: ML20070R002 (13)

Text

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VIHOINIA ELECTHIC AND POWI5H COhfl'ANY uncunonn,Vsuunnss uuuas May 13, 1994 U. S. Nuclear Regulatory Commission Serial No.94-305 Attention: Document Control Desk NL&P/JHUGSS Washington, D.C. 20555 Docket Nos.

50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:

VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 MONTHLY OPERATING REPORT Enclosed is the Monthly Operating Report for North Anna Power Station Units 1 and 2 for the month of April 1994.

Very truly yours, M. L Bowling, Manager Nuclear Licensing & Programs Enclosure cc:

U.S. Nuclear Regulatory Commission 101 Marietta Street, NW Suite 2900 Atlanta, GA 30323 Mr. R. D. McWhorter NRC Senior Resident inspector North Anna Power Station

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,l-VIRGINIA POWER COMPANY NORTH ANNA' POWER STATION MONTHLY OPERATING REPORT MONTH:

April YEAR:

1994 i

l I

Approved:

A Station Manager

OPERATING DATA REPORT l

1 DOCKET NO.*

$0 338 DATE: May 2, 1994 CONTACT: J. A. Stall PHONE: (703) 894 2101 1

OPERATING STATUS l

1 1.

Uni t N amc :................................ N or t h Anna 1

2. - Rtport i ng Per i od:......................... Apr i l 1994 3.

Licensed Thermal Power (MWt):.............

2,893 4.

Nameplate Rating (Gross MWe):.............

994 1

5.

Design Electrical Rating (Net MWe):.......

907 3

6.

Maximum Dependable Capacity (Gross MWe):..

948 7.

Maximum Dependable Capacity (Net MWe):....

900 4

6 4

8.

If changes occur in Capacity Ratings (!tems No. 3 thru 7) since last report, give reasons:,_The nameplate j

rating for the generator has been revised. The original nameplate rating was inadvortently miscalculated t

j 9.

Power level to which restricted, if any (Net MWe): ___N/A

?

10. Reasons for restrictions, if any:

N/A 1

l This Month Y t-D Cumulative i

11. H ours i n R epor t i ng Pe r i od...............................

719.0 2,8 79.0 138,9?5.0 i

12. Number of Hours Reactor was Critical.........

719.0 2,879.0 103,284.7

13. React or Reserve Shutdown H ours..........................

0.0 0.0 6,rd6,8

14. Hours Generator On Line................................

719.0 2,879.0 100 $19.9

15. Unit Reserve Shutdown Hours..............................

0.0 0.0 0.0

16. Gros s Thermal Energy Generated (MWH )................... 2,078,791.0 8,325,428.4 266,777,664.8

17. Gross E lec t rical E nergy Generat ed (MWH)..................

686,853.0 2,746,170.0 87,661,527.0

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18. Net Electrical Energy Generated (MWH)....................

654,102.0 2,614,734.0 83,021,319.0

19. Unit Service Factor...........................

100.0%

100.0%

72.2%

j^

20. Unit Availability Factor......................

100.0%

100.0%

72.2%

21. Unit Capacity Factor (using MDC Net).....................

101.1%

100.9%

66.9%

22. Unit Capacity Factor (using DER Net).....................

100.3%

100.1%

65.9%

23. F or c ed Ou t a g e R a t e......................................

0.0%

0.0%

10.5%

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each)__ Refueling, 09/09/94, 48 days 5

25. If Shutdown at end of Report Period, estimated time of Startup:__N/A

26. Units in Test Status (Prior to Commercial Operation):

Forecast Achieved i

INITIAL CRITICALITY d

INITIAL ELECTRICITY COMMERCIAL OPERATION k

k

l AVERAGE DAILY UNIT POWER LEVEL Docket No.:

50-338 Unit:

NA-1 Date:

May 2, 1994

Contact:

J.

A.

Stall Phones (703) 894-2101 MOlmI April 1994 DAY AVERAGE DAILY POWER DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

LEVEL (MWe-Ne t) 1 911 17 912 2

910 18 911 3

910 19 910 4

910 20 910 5

910 21 911 6

910 22 910 7

912 23 911 8

896 24 910 9

909 25 910 10 910 26 909 11 910 27 910 12 911 28 909 13 911 29

_208 14 911 30 908 15 911 16 912 i

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.

NORTH ANNA POWER STATION UNIT NO.:

1 MONTH:

April a

SUMM_ABY OF OPERATING EXPERIENCE 4

Page 1 of 1 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.

]

Date Time Data April 01, 1994 0000 Began month with unit at 100% power, 956 MWe.

April 08, 1994 0853 Commenced unit ramp-down for TVFT.

0951 Unit stable at approximately 90% power, 860 MWe for TVFT.

1051 TVFT completed satisfactorily.

1113 Commenced unit ramp-up to 100% power.

1315 Unit stable at 99.5% power, 948 MWe, awaiting return to service of 1-SD-P-2A.

April 09, 1994 0230 1-SD-P-2A returned to service.

Commenced unit ramp-up to 100% power.

0300 Unit stable at 100% power, 955 MWe.

4 April 30, 1994 2400 Ended month with unit at 100% power, 957 MWe.

t d

d 1

4 1

Page 1

of 1

UNIT SHUTDOWN AND POWER REDUCTIONS Explanation Sheet Docket No.:

50-338 Report Month April Unit Name:

NA-1 Year:

1994 Date May 2, 1994

Contact:

J.

A.

Stall

• No entry this month.

i I

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO.:

50-338.

UNIT NAME:

NA-1 DATE: May 2, 1994 l

REPORT MONTH: April 1994 CONTACT: J. A. Stall PHONE: (703) 894-2101 1

2 3

4 5

No.

Date Type Duration Reason Method of Licensee System Component' Cause & Corrective (hrs)

Shutting Event Code Code Action to Down Reactor Report #

Prevent Recurrence ONo entry this month.

1: Type 2: Reason.

3: Method 4:

F= Forced A= Equipment Failure (explain) 1= Manual Exhibit F - Instructions S= Scheduled B= Maintenance or Test 2= Manual Scram for preparation of Data C= Refueling 3= Automatic Scram. Entry Sheets for Licensee D= Regulatory Restriction 4= Continuations Event Report (LER) File E= Operator Training & License Examination 5= Load Reduction (NUREG-0161)

F= Administrative 9=Other G= Operational Error 5:

H=Other (explain)

Exhibit H - Same Source

OPERATING DATA REPORT DOCKET NO.:

50 339 DATE: May 2,1994 CONTACT:

J. A. Stall PHONE: (703) 894-2101 OPERATING STATUS 1.

Uni t N a me :................................ N o r t h A nna 2 2.

Reporting Periodt....................... April 1994 3.

Licensed Therma! Power (MWt):...

2893 4.

Nameplate Rating (Gross MWe):.............

9 79 5.

Design Electrical Rating (Net MWe):.......

907 6.

Maximum Dependable Capacity (Gross MWe):..

935 7.

Maximum Dependable Capacity (Net MWe):....

887 8.

If changes occur in Capacity Ratings (Items No. 3 thru 7) since last report, give reasons: __The nameplate rating for the generator has been revised. The original nameplate rating was inadvertently miscalculated.

9.

Power level to which restricted, if any (Net MWe): ___N/A

10. Reasons for restrictions, if any:

N/A This Month Y-t-D Cumulative

11. Hours in Reporting Period.............................

719.0 2,879.0 117,263.0

12. Number of Hours Reactor was Critical....................

709.3 2,853.2 97,226.8

13. React or R eserve Shutdown Hours........................

9.7 25.8 6,439.0

14. Hours Generator on-Line..............

685.0 2,815.5 96,132.9

15. Unit Reserve Shutdown Hours..................

0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH)...

....... 1,906,597.7 7,989,786.5 260,215,444.2

17. Gross E lectrical Energy Generat ed (MWH)..................

615,774.0 2,588,307.0 85,183,783.0

18. Net E lectrical Energy Generated (MWH).................

585,076.0 2,461,671.0 81,511,372.0

19. Unit Service Factor...........................

95.3%

97.8%

82.0%

20. Unit Availability Factor.................................

95.3%

97.8%

82.0%

21. Unit Capacity Factor (using MDC Net)...................

91.7%

96.4%

77.2%

22. Unit capacity Factor (using DER Net)...

89.7%

94.3%

76.6%

+

23. Forced Outage Rate...................

4.7%

2.2%

5.3%

i I

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):_N/A 4

1 4

1

25. If Shutdown at end of Repcrt Period, estimated time of Startup:

N/A 1

26. Units in Test Status (Prior to Commercial Operation):

Forecast Achieved i

!NITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION i

4 4

~ - - - - - - -.. ~ -

+

i AVERAGE DAILY UNIT POWER. LEVEL Docket No.:

50-339 i

Unit NA-2 Date:

May 2, 1994 Contacts.

J. A.

Stall 1

4 Phone:

(703) 894-2101 I

J i

a i

f MONTH:

April 1994 1

l i

I, DAY AVERAGE DAILY POWER.

2 DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

LEVEL (MWe-Net) 1 894 17 892 i

2 179 18 893-3 0

19 893 i

4 191 20 893 I

5 808 21 894 1

6 890 22 894 7

392 23 894 j

i 8

893 24 893-9 893 25 892 10 893 26 892 l

11 893 27 894 j_

12 892 28 893 13 894 29 879 14 893 30

-893 l

15 892

?

16 893 i

i 1

l 4

i Instructions:

I 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.

l 4

i n

e

y

NORTH ANNA POWER STATION UNIT NO.:

2 MONTH:

April

SUMMARY

OF OPERATING EXPERIENCE Page 1 of 2 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.

Date Time Data April 01, 1994 0000 Began month with unit at 100% power, 941 MWe, April 02, 1994 0100 Commenced unit ramp-down to approximately 8% reactor power in order to repair a leaking manway on the "C"

high pressure heater drain tank.

0512 Unit stable at approximately 30%

power, 240 MWe for chemistry hold.

0841 Continued unit ramp-down.

0909 Unit stable at approximately 18%

power, 130 MWe due to problems with the turbine control system.

1050 Continued unit ramp-down.

1117 Unit stable at approximately 8%

power, 50 MWe.

1245 Repairs to tank manway complete.

Commenced unit ramp-up.

1329 Unit at 22% power, 180 MWe.

Repairs to tank manway were unsuccessful.

Commenced unit rampdown to remove unit from service.

1500 Main generator off-line.

Unit entered Mode 2.

1530 Unit entered Mode 3.

April 03, 1994 0110 Repairs to tank manway completed.

Unit entered Mode 2.

April 04, 1994 0005 Unit entered Mode 1.

0057 Main generator placed on-line.

Commenced unit ramp-up.

0200 Unit stable at 30% power, 250 MWe for chemistry hold.

SUMMARY

OF OPERATING EXPERIENCE Page 2 of 2

~ April 05, 1994 0030 Released from chemistry hold.

Commenced unit ramp-up.

0540 Unit stable at 97% power, 916 MWe with all turbine governor valves full open.

0600 Commenced bypassing first point feedwater heaters to attain 100%

reactor power.

1143 Unit stable at 100% power, 935 MWe with first point feedwater heater bypass valves full open and first point feedwater heater outlet valves throttled.

April 29, 1994 0947 Commenced unit ramp-down for TVFT.

1004 During ramp-down at approximately 95% power, one of the two motors grounded for the generator leads cooling fan.

Increased ramp rate to 1% per minute.

1029 Unit stable at approximately 82.5%

power, 783 MWe.

Swapped belts to the other motor for the generator leads cooling fan.

1030 Received high vibration alarm for #1 turbine bearing.

Increased power to approximately 83% power, 790 MWe to decrease vibrations.

1056 Commenced unit ramp-up to place unit in power range required for TVFT.

1131 Unit stable at 92% power, 857 MWe for TVFT.

1240 TVFT completed satisfactorily.

1313 Commenced unit ramp-up to 100%

power.

1500 Unit stable at 100% power, 937 MWe, April 30, 1994 2400 Ended month with unit at 100% power, 939 MWe, l...

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Page 1

of 1

j 1

l' UNIT SHUTDOWN AND POWER REDUCTIONS Explanation Sheet i

1 Docket No.:

50-339 1

1 e.

i i

Report Month April Unit Names-NA-2 J

j Year:

1994 Date: May 2.

1994

Contact:

J.

A.

Stall 1-3

1. 94-03 April 02, 1994 l

4 j

Commenced unit ramp-down to approximately 8% power to repair a leaking manway on the "C" high pressure j-heater drain tank at 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />.

Unit stable at approximately 8% power, 50 MWe at 1117 hours0.0129 days <br />0.31 hours <br />0.00185 weeks <br />4.250185e-4 months <br />.

4 1

Commenced unit ramp-up at 1245 hours0.0144 days <br />0.346 hours <br />0.00206 weeks <br />4.737225e-4 months <br /> after l

completion of repairs to tank manway.. Repairsfto l

tankLmanway determined to be' unsuccessful at 1329 1

3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> with the unit at approximately 22%Lpower, 180 1

j MWe.

1

1. 94-04 April 02, 1994 j

commenced unit-ramp-down to-remove. unit from service at 1329 hours0.0154 days <br />0.369 hours <br />0.0022 weeks <br />5.056845e-4 months <br /> due to unsuccessful attempts to repair a leaking manway'on the "C" high pressure i

heater drain tank with the unit on-line.

Main 1

j generator off-line-and unit entered Mode 2 at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br />.

Unit entered ~ Mode 3 at 1530 hours0.0177 days <br />0.425 hours <br />0.00253 weeks <br />5.82165e-4 months <br />.

i i

April 03, 1994 Unit entered Mode 2 after completion of tank manway repairs at 0110 hours0.00127 days <br />0.0306 hours <br />1.818783e-4 weeks <br />4.1855e-5 months <br />.

1 April 04, 1994 I

Unit entered Mode 1 at 0005 hours5.787037e-5 days <br />0.00139 hours <br />8.267196e-6 weeks <br />1.9025e-6 months <br />.

Main generator placed on-line at 0057 hours6.597222e-4 days <br />0.0158 hours <br />9.424603e-5 weeks <br />2.16885e-5 months <br />.

l April 05, 1994 j

Unit stable at 100% power, 935 MWe at 1143 hours0.0132 days <br />0.318 hours <br />0.00189 weeks <br />4.349115e-4 months <br />.

1 1

4

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UNIT SHUTDOWNS AND POWER REDUCTIONS d

DOCKET NC.:

50-339 UNIT NAME:

NA-2 DATE: May 2, 1994 REPORT MONTH: April 1994 CONTACT:

J.

A.

Stall PHONE: (703) 894-2101 1

2 3

4 5

No.

Date Type Duration Reason Method of Licensee System Component Cause & Corrective (hrs)

Shutting Event Code Code Action to Down Reactor Report #

Prevent Recurrence 94-03 940402 S

N/A N/A N/A SN TK Unit brought to 8% reactor power to repair leaking manway on high pressure heater drain tank.

94-04 940402 F

34.0 1

N/A SN TK Unit shutdown, required due to unsuccessful attempt to repair leaking manway on high pressure heater drain tank with unit on line.

1: Type 2: Reason

-3 : Method 4:

F= Forced A= Equipment Failure (explain) 1= Manual Exhibit F-- Instructions S= Scheduled B= Maintenance or Test 2= Manual Scram for preparation of Data C= Refueling 3= Automatic Scram Entry Sheets for Licensee D= Regulatory Restriction 4= Continuations Event Report (LER) File E= Operator Training & License Examination 5= Load Reduction (NUREG-0161)

F= Administrative 9=Other G= Operational Error 5:

H=Other (explain)

Exhibit H - Same Source

-.