ML20082R947

Monthly Operating Repts for Aug 1991 for North Anna Station, Units 1 & 2

ML20082R947
Person / Time
Site:	North Anna
Issue date:	08/31/1991
From:	Mladen C, Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
91-535, NUDOCS 9109160314
Download: ML20082R947 (13)

Text

.

Va lt OIN I A 151.100T141C AND t' owl lt COMi%NY Itirii> iou n, Vinninir ene t,i September 11, 1991 U. S. Nuclear Regulatory Commission Serial No.91-535 Attention: Document Control Desk

.iLOP/JMJ:jmj Washington, D.C. 20555 Docket Nos.

50 338 50-339 License Nos. NPF 4

[

NPF-7 Gentlemen:

ElflGINIA ELECTRIC AND POWER COMPAt1Y

(

NORTH ANNA P.QWER 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 August 1991.

Very truly yo.

/

W. L. St art Senior V ce President - Nuclear Enclosures l

l cc:

U.S. Nuclear Regulatory Commission 101 Marietta Street, NW Suite 2900 Atlanta, GA 30323 Mr. M. S. Lesser NRC Senior Resident inspector North Anna Power Station 9109160314 910331 DR ADOCK 0500 8

f627

VIRGINIA POWER COMPANY NORTil ANNA POWER STATION MONTHLY OPERATING REPORT MONTH:

Augyst YEAR:

1991 Approved:

Iw b

taEion Manager

OPERAllWG DATA REPORT DOCKET Wo.:

50 338 DATE: Septectwr 1,1991 COMPLETED Bt C. Mladen OP[RAllWG $1ATUS 1.

Unit rames................................ Worth Anna 1 2.

Reporting Period:......................... August 1991 3.

Licensed thermal Power (MVt):.............

2,893 4 kameplate Rating (Gross NWe):.............

947 5.

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

907 6.

Maxin n Dependable Capacity (Gross MWe)..

959 7 Havian Dependable Capacity.(het MWe)....

911 8.

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

N/A 9.

Power levet to which restricted, if any (Net MWe): _ /A W

10. Reasons for restrictions, if any:

N/A This Month Yt0 Cumulative

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

744.0 5,831.0 115,643.0

12. hwber of Hours Reactor was Critical.....................

721.(

3,962.8 83,953.7

13. Reactor Reserve Shutdown Hours...........................

22.3 106.6 6,712.2

14. Hours Generator 0n Line..................................

718.5 3,817.5 21,037.5

15. Unit Reserve shutdown Hours..............................

0.0 0.0 0.0

16. Gross Thermat Energy Generated (MWH).................... 2,027,352.1 10,070,597.1 215,056,f33.1

17. Gross Electrical Energy Generated (MWW)........

667,161.0 3,311,029.0 70,652,367.0

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

634,467.0 3,141,470.0 66,870,222.0 19, Unit Service Factor.....................

96.6%

65.5%

70.1%

20. Unit Availability factar..........

96.6%

65.5%

70.1%

21. Unit Capacity factor (using MDC Wet)..........

93.6%

59.1%

64.6%

22. Uni t Capac i t y F act or (us i ng DER Wet ).....................

94.0%

59.4%

63.8%

23. forced Outage Rate.......................................

3.4%

14.8%

12.6%

24. Shutdowns $cheduled Over Next 6 Months (Type, Date, and Duration of f ach): _None

25. If shutdown at end of Report Period, estimated time of Startup:

N/A

26. Units in Test Status (Prior to Ccatercial Operatico):

Forecast Achieved INITIM CRITICALITY INiill

CTRICITY COMMEI OPERATION S.

9 AVERAGE DAILY UNIT POWER LEVEL Docket No.

50-338 Unitt NA-1 Dates September 1.

91 Completed by:

C. Mladen Phonet 1203) 094-2774 HONTH: _luctu st 1991 DAY AVERAGE DAILY POWER DAY AVERAGE DAILY LEVEL LEVEL (MWe-Not)

LEVEL (MWe-Net) 1 908 17 903 2

907 18 903 3

907 19 904 4

907 20 903 5

907 21 904 6

907 22 903 7

907 23 904 8

103 24 904 9

185 25 906 10 845 26 906 11 896 27 907 12 890 23 907 13 892 29 906 14 901 30 905 15 902 31 905 16 903 Instructionst On this format, list the average daily unit power level in MWe-Het for each day in the reporting month.

Compute to the nearest whole megawatt.

i UNIT SHUTDOWNS AND POWER REDUCTIONS

~

DOCKET NO.:

50-338-UNIT NAME:

NA-1 DATE: September 1, 1991 REPORT MONTH: August 1991 COMPLETED BY:

C. Mladen-l PI'9NE:

(703) 894-2774 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 91-06 910808 F

25.5 A

3 N1-91-017 SB ISV Safety Injection and subsequent Reactor trip.

l due to closure of "A"

Main Steam Trip valve 3: Method 4

1: Type 2: Reason F= Forced A= Equipment Failure (explain) 1= Manual Exhibit F - Instructions S= Scheduled B= Maintenance or Test 2= Manual Scram for preparation of Data 3= Automatic Scram Entry Sheets for License @

C= Refueling D= Regulatory Restriction 4= Continuations Event Report (LER) File E= Operator Training & License Examination 5= Load Reduction (NUREG-Ol61)

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

H=Other (explain)

Exhibit H - Same Source

\\

Page 1

of 1

UNIT SHUTDOWN AND POWER REDUCTIONS Explanation sheet Docket No.

50-338 Report Month Appqp,gi Unit Names NA-1 Yeart

,_) r M_

Dates September 1.

1991 Com(

b Cathie Mladen

1. 91-06 August 06

,v i Safety Injection and subsequent Reactor trip as a result of "A"

Main Steam Trip Valve closure at 0242 hours0.0028 days <br />0.0672 hours <br />4.001323e-4 weeks <br />9.2081e-5 months <br />.

Initiated " Notification of Unusual Event" at 0250 hours0.00289 days <br />0.0694 hours <br />4.133598e-4 weeks <br />9.5125e-5 months <br />.

Terminated " Notification of Unusual Event" at 0557 hours0.00645 days <br />0.155 hours <br />9.209656e-4 weeks <br />2.119385e-4 months <br />.

August 09, 1991 Unit entered Mode 2 at 0100 hours0.00116 days <br />0.0278 hours <br />1.653439e-4 weeks <br />3.805e-5 months <br />.

Unit entered Mode 1 at 0338 hours0.00391 days <br />0.0939 hours <br />5.588624e-4 weeks <br />1.28609e-4 months <br />.

Main generator on-line at 0410 hours0.00475 days <br />0.114 hours <br />6.779101e-4 weeks <br />1.56005e-4 months <br />.

Unit stable at 30% for Chemistry hold at 0532 hours0.00616 days <br />0.148 hours <br />8.796296e-4 weeks <br />2.02426e-4 months <br />.

Commenced unit ramp-up to full power at 2022 hours0.0234 days <br />0.562 hours <br />0.00334 weeks <br />7.69371e-4 months <br />.

August 10, 1991 Unit stable with all turbine valves full open at 97%

power at 0443 hours0.00513 days <br />0.123 hours <br />7.324735e-4 weeks <br />1.685615e-4 months <br />.

August 15, 1991 Unit stable at 99.5% power with the first point feedwater bypass valves full open.

NORTH ANNA POWER STATION i

UNIT NO.

1 MONTH:

,_Angust Page 1 of 2

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.

Date Tinq Data August 01, 1991 0000 BegLa month with unit at 100%,

959MWe, August 08, 1991 0242 Safety Injection and subsequent Reactor trip as a result of " A" Main Steam Trip Valve closure and subsequent high steam flow in "B"

and "C" steam lines and low pressure in the "B" and "C" steam generators.

0250 Initiated " Notification of Unusual Event."

0557 Terminated " Notification of Unusua1 Event."

August 09, 1991 0100 Unit entered Mode 2.

0338 Unit entered Mode 1.

0410 Main generator on-line.

0532 Unit stable at 30%

power for Chemistry hold.

1844 Cleared Chemistry hold.

2022 Commenced unit ramp-up to full power.

August 10, 1991 0339 Unit stable at 90%

power for calorimetric.

0401 Commenced unit ramp-up to full power.

0443 Unit stable with all turbine valves full open at 97% power, 1330 Unit stable at 98.5% power after performance of procedure to bypass a portion of the feedwater to the first point heaters.

~

NORTH ANNA POWER STATION UNIT NO.I 1

MONTH:

AuctRal_,

Page 2 of 2 BUMMARY OF OPERATJNG ElPERIENCE t

ipontinued)

August 14, 1991 1330 Unit stable at 99.4% power after

-< positioning valves to bypass a

?ger portion of the feedwater to use first point heaters.

August 15, 1991 1638 Unit stable at 99.5% power after opening the first point foodwater heater bypass valves to the full open position.

August 31, 1991 2400 Ended month with unit at 300%,

952MWe.

t

[

f l

F l

t t

t'

OPERAflWG DA1A SEPORT 00CLET Wo.:

50 339 DATE: Septecter 1,1991 CCHPLE1ED BY:

C. Mladen PH0hE (703) 894 2774 OPERAllWG $1ATUS 1.

Uni t k ame s................................ k or t h Area 2 2.

Reporting Periods......................... August 1991 3.

L icensed thermal Power (MWt);.............

2893 4.

hameplate Rating (bross MWe):.............

947 5.

Design Flectricot Rating (het MWe):.......

907 6.

Maaleun Dependable Capacity (Cross MWe):..

957 7.

Maxinun Dependable Capacity (het MWe):....

909 8.

If changes occur % Capacity Ratings (Items No. 3 thru 7) since last *eport, give reasons:

n/A 9.

Power level to which restricted, if any (het MWe): _ N/A

10. Reasons f or restrictions, if any; N/A This Month Y-t D Cuwle t ive

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

744.0 5,831.0 93,911.0

12. hwtier of Hours Reac tor was Cri t ical....................

744,0 5,E31.0 76,965.3

13. R eact or R eserve Shutdown Hour s..........................

0.0 0.0 5,949.6

14. Hoe a Generator On Line..................

744.0 5,831.0 76,065.3

15. uni t R es e r ve Shutdown H our s.............................

0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH).................. 2,151,496.2 16,860,445.4 204,109,558.8

17. Cross Electrical Energy Generated (MWH).....

701,628,0 5.558,789.0 66,861,375.0

18. Net E l ec t r i c al E nergy renera t ed t MWH )....................

666,245.0 5,2S8,963.0 64,104,443.0

19. Uni t serv ice f ac t or..................

100.0%

100.0%

81.0%

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

100.0%

100.0%

81.0%

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

98.5%

99.8%

75.9%

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

98.7%

100.0%

75.3%

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

0.0%

0.0%

5.9%

24. Shutdowns Schedated Over heat 6 Months (Type, Date, and Duration of Each): _kone

25. If shutdown at end of Report Period, estimated time of Startup:

N/A 26, Units in Test Status (Prior to Corrmercial Operation):

Forecast Actieved INITIAL CRITICALITY INiilAL ELECTRICITY COMMERCIAL OPERATION

AVERAGE DAILY UNIT POWER LEVEL Docket No.t 50-339 Unit HA-2 Date:

Sootember_1, 91 Completed by:

C.

Mladen Phonet (703) 894-2774

)b l I)

L MONTH: _Epptebber 1991 DAY AVERAGE DAILY POWER DAY AVERAGE DAILY LEVEL LEVEL (MWe-Nat)

LEVEL (MWe-Not) 1 898 17 897 2

897 18 896 3

897 19 895 i

4 897 20 896 5

896 21 896 6

897 22 896 7

897 23 896 8

897 24 896 9

886 25 889 10 897 26 887 11 896 27 896 12 897 28 897 13 898 29 896 14 897 30 895 15 895 31 895 16 896 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,

\\

UNIT S!!UTDOWNS RND POWER REDUCTIONS DOCKET NO.:

50-339 ~

UNIT NAME:

NA-2 DATE: September 1, 1991 REPORT MONTH: August 1991 COMPLETED BY:

C. Mladen PHONE:

(703) 894-2774 1

2 3

4 5

No.

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

' Shutting Event Code Code Action to Prevent Recurrence Down Reactor Report /

ONo entry this month l

l l

3: Method 4:

1= Manual Exhibit F - Instructions 1: Type 2: Reason F= Forced A= Equipment Failure (explain) 2= Manual Scram for preparation of Data S= Scheduled B= Maintenance or Test 3= Automatic Scram Entry Sheets for Licensee C= Refueling 4= Continuations Event Report (LER) File D= Regulatory Restriction E= Operator Training & License Examination 5= Load Reduction (NUREG-0161) 9=Other F= Administrative 5:

G= Operational Error Exhibit H - Same Source H=Other (explain) f o----__

Page 1

of 1

UNIT SHUTDOWN AND POWER REDUCTIONS Explanation shoot Docket No.:

50-339 Report Month AMEMyl Unit Namot NA-2

_.991 Date September 1.

1991 Year Completed byt Cathie Mladen

• No entry this month

t t

NORTH ANNA POWER STATION UNIT NO.

2 MONTH:

_Ausust gylillABI_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.

Date Time Data August 01, 1991 0000 Began month with unit at 100%,

348MWe.

August 09, 1991 1006 Commenced unit ramp-down to 880MWe for TVFT.

1050 Unit stable at 880MWe.

1356 TVFT completed satisfactorily.

1400 Commenced unit ramp-up to 100%

power.

1505 Unit stable at 100%, 946MWo.

August 25, 1991 0625 Westinghouse Prodac-250 plant computer failed.

1708 Commenced unit ramp-down of approx 3mately 2% power as result of calorimetric indications.

Due to loss of plant computer, alternate means were used to determine calorimetric.

The steam flow and food flow in this system are not pressure compensated.

1727 Unit stable af ter 2% power decrease.

August 26, 1991 0900 Westinghouse Prodac-250 plant computer restored.

0958 Commenced unit ramp-up to 100%

power.

1245 Unit stable at 100% power.

August 31, 1991 2400 Ended month with unit at 100%,

944MWe.

4

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