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Monthly Operating Repts for Sept 1991 for North Anna Power Station,Units 1 & 2
	ML20085E998
Person / Time
Site:	North Anna
Issue date:	09/30/1991
From:	Mladen C, Stewart W; VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	; NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
	91-611, NUDOCS 9110210323
	Download: ML20085E998 (15)
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VlltulNIA IU.l:CTldlO AN D POWl lt COSU'ANY lticiistoxu,Vomixir unen October 11, 1991 U. S. Nuclear Regulatory Commission Serial No.91-611 Attention: Document Control Desk NL&P/JMJ:jm]

Washington, D.C. 20555 Docket Nos. 50-338 50-339 License Nos. NPF-4 NPF-7 Gentlemen:

flRGINIA ELECTRIC AND POWER COMPANY M1RTH ANNA POWER STATION UNITS 1 AND 2 MONTHLY OPER ATING REPORT Enclosed is the Monthly Operating Report for Nonh Anna Power Station Units 1 and 2 for the month of September 1991.

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W. l . Stewart Senior Vice President - Nuclear Enclosures cc: U.S. Nuclear Regulatory Commission 101 Marietta Street, NW Suite 2900 Atlanta, GA 30323 Mr. M. S. Lesser NRC Senior Resident inspector Nodh Anna Power Station 9110210323 910920 g gas noccuocoopgge f) M k I 4

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VIRGINIA POWER COMPANY '

NORTH ANNA POWER STATION MONTHLY OPERATING REPORT

-MONTH: September YEAR 1991 1

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Approved:

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OPERAllNG DATA REPC2T DOCKET ko.: 50 338 DATE: October 1, 1991 COMPLETED BY C. Mladen OPERATING $TATUS

1. Unit Names................................ North Anna 1

2. 5 Report ing Per i cd t . . . . . . . . . . . . . . . . . . . . . . . . . $ept ent)er 1991

3. Licensed Thermat Power (MWt) ............. 2,893 4.- ' Namepla t e Rat ing (Gross MVe) . . . . . , . . . . . . . 947

5. 0: sign Electrical Rating (Net Mwe):....... 907

6. 14ximum Dependahle Capac{ty (Gross NWe):.. 959

7. Maxina Dependable Capacity (Net MWe) .... 911

. B. It changes occur in Capacity Ratings (!tems No. 3 thru 7) since test 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 Yat-0 CumJlat ive

11. Hours in Reporting Period................................ 720.0 6,551.0 116,363.0

12. Nunber ' of Nurs R eact or was Cri t i cal . . . . . . . . . . . . . . . . . . . . . 720.0 4,682.8 84,673.7

13. Reac t or R eserve Shutdown Hours . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.0 108.6 6.712.2

14. Hours Cenerator 0n-Line.................................. 720.0- 4,537.5 81,757.5

15. Unit Reserve Shutdown Hours.............................. 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWh)... ................ 2,079,564.7 12,150,161.8 217,136,397.8

17. Gross E lect rical Energy Generat ed (MWH) . . . . . . . . . . . . . . . . . . 684,900.0 3,995,929.0 71,337,267,0

18. Est E lec t r i cal Energy Generat ed (MWN ) . . . . . . . . . . .. . . . . . . . . 652,591.n 3,794,061.0 67,522,813.0

19. Unit service factor...................................... 100.0% 69.3% 70.3%

20. Uni t A va l t abi l i t y F ac t or . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100.0% 69.3% 70.3%

21. Unit Capacity Factor (using Hot Net)..................... 59.5% 63.6% 64.8%

22. Unit Capacity Factor (using DER Net).................. .. 99.9% 63.9% 64.0%

~23. Forced Outage Rate....................................... 0.0% 12.8% 12.5%

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

25. If Shutdown at end of Report Period, estimated time of Startups _ _ N/A,,

26. Units in fest Status (Prior to Consnercial Operation):

Forecast Achieved

-INITIAL CRITICALITY INITIAL ELEUTRICITY COMMERCIAL OPERATION

AVERAGE DAILY-UNIT-POWER ~ LEVEL Docket No.: 50-338 Unit NA-1 i Date: October 1. 1991

-completed by: C.--Mladen-Phone 17031-894-2774 r

MONTH: SeDtember 1991 AVERAGE DAILY POWER DAY DAY AVERAGE DAILY LEVEL LEVEL (MWe-Net) LEVEL (MWe-Net) 1- 906 17 906 2 907 18 907 3 907 19 907

, 14 -908- 20 906

-5 _ 907 21 905 6 908 22 905 7' __ 907 23 907 18 907 24 907 9 906 25 908 10 ., 907 26 908 11 908- 27 908 12- 908 28- -908

' 13 ' 888 29- 909 14 907 30 910 15 907 16 906 l

g-L Instructions i On:this focmat, list the averago-daily unit power level in MWc-L Not for each daylin the reporting month, compute to the nearest

, -whole megawatt.

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UNIT SHUTDOWWS AND POWER REDUCTIONS .

DOCKET NO.:- 50-338 UNIT NAME: NA-1 DATE: October'1, 1991 REPORT MONTH: September 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 Down Reactor Report / Prevent Recurrence I

ONo entry this month.

il 1: Type 2: Reason 3: Method 4:

F= Forced A= Equipment Failure (explain) 1= Manual Exhibit F - Instructions for preparation of Data '

S= Scheduled B= Maintenance or Test 2= Manual Scram 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 ;

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-UNIT SHUTDOWN AND POWER REDUCTIONS-Explanation sheet-Docket No.: 50-338 Report Month Seotember Unit'Name: -NA-1 Years 1991- .. D a t e t. O c t o b e r - 1 . 1991 Completed by: Cathie Mladen

No entry this month.

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l NORTH ANNA POWER STATION

UNIT No,t 1 MONTH: _!!cotemb.er_

MMMARY OF OPIRATlH0_EXPIRIEEE Listed belcw in chronological coquence is a summary of operating experiences for this month which required load reductions or resulted in significant non-load related incidents.

DAtt TiRQ DAin September 01, 1991 0000 Began month with unit at 100%,

952MWo.

September 13, 1991 0846 Commenced unit ramp-down to 840MWe for TVFT.

1006 Unit stable at 840MWe.

1120 TVFT completed satisfactorily.

1209 Commenced unit ramp-up to 100%

power.

1500 Unit stable at 100%, 954MWo.

September.30, 1991 2400 Ended month with unit at 100%,

959MWo.

Ort R AllNG D AT A R[ PORT DDCKET WO.i 50 339 DAlt: October 1, 1991 COMPLE1[D BY C. Mladen PHDNit (703) 894 2774 OPERAllWC STATUS

1. Un i t W ene t . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N o r t h A %ns 2

2. R epor t i ng Per i od t . . . . . . . . . . . . . . . . . . . . . . . . . $ept enter 1991

3. Licensed therrwl Power (MWt) ............. 2293

4. kamepl ate R at ing (Cross MWe) . , . . . . . . . . . . . 94 7

5. Design E lec t rical Rat ing (Net awe h . . . . . . . 907

6. Maximan Detendable Cepecity (Gross MWe) .. 957

7. Maalmum Dependable Capacit y ; Net MWe;t .. . . 909

8. If changes occur in Cepacity Ratings (items No. 3 thru ?) cince last report, give reasons:

W/A 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 Cumulstive

11. H ours i n R epor t i ng P e r i od. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 720.0 6,551.0 94.631.0

12. humber of hours Reactor was Critical..................... 603.5 6,434.5 77.568.8

13. Reactor Reserve Shutdown Hours....... ...... ............ 65.9 65.9 6,015.5

14. Hours Generator on Line.... ........... ...... ......... 551.3 6,382.3 76,616.6

15. Unit Reserve Shutdown Hours........ ........... ... .... 0.0 0.0 0.0

16. Cross T herma l E nergy Genera t ed ( MWH ) . . . . . . . . . . . . . . . . . . . . . 1,502,432.1 18,362,877.5 205,611,990.9

17. Cross Electrical Energy Generated (MWH)... 484,673.0 6,043,462.0

.............. 67,346,048.0

18. Net E lec tr ical Energy Generat ed (MWM). . . . . . . . . . . . . . . . . . . . 459,020.0 5,747,977.0 64,563,457.0

19. Unit Service Factor........... .................. .. .... 76.6% 97.4% 81.0%

20. Uni t Avai l abil i ty F ac

or . . . . . . . . . . . . . . . . . . . . . . . ........ 76.6% 97.4% 81.0%

1. Unit Capacity Factor (using MDC Net)... . ... .......... 70.1% 96.5% 75 .8%

22. Unit Capacity Factor (using DER het). .. .. ..... ... 70.3% 96.7% 75.2%

23. Forced Outage Rate ........... .... .. . .. .. .. ... 23.4% 2.6% 6.1%

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

25. If Shutdown at end of Report Period, estimated time of startto: N/A

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

Forecast Achieved thlilAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL 00ERAfl04 ._

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-AVERAGE' DAILY UNIT POWER LEVEL Docket No.: 50-339 Unitt , _ , . .

NA-2 Datet . Qctober 1. 1991 completed by: C. Mladen PhoneI (703) 894-2774 MONTH t _- Sentember 1991 l DAY AVERAGE DAILY POWER DAY- AVERAGE DAILY LEVEL.

LEVEL (MWe-Net) LEVEL (MWe-Net) 1 895- 17 895 2' 896 18 82.s 897 19 895

4 898 20- 195

-5 896- 21 0 6 _. -890 22 0 7' 897 23 0 ___

18 896- 24 0

'9. 896 25 0 10 896 26 73 11 -896 27 94 12 897- 28 246-13- 897 29 595

~14 896' 30-- 900

. 900 ,

16 895 l 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.-

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DOCKET NO.': 50-339 UNIT NAME:' NA DATE: October 1, 1931' -

REPORT. MONTH: September 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 i (hrs)' . Shutting Event Code Code Action-to i Down Reactor Report # Prevent Recurrence -

i 91-07 910920 F 152.6 A 3 N2-91-009 SJ FCV Reactor Trip due to closure of "B" Main Feed Regulating Valve.

Safety Injection due to-Steam Dump System malfunction. Corrective maintenance completed on malfunctioning <

equipment.-

91-08 910927 F 16.1 A 1 -N/A TB XFMR Corrective maintenance required on "A" Station ,

Service Transformer 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

Page 1 of __2 UNIT SHUTDOWN AND POWER REDUCTIONS Explanation Sheet Docket No.: 50-339 Report Month Septembr: Unit Name: NA-2 Year 1991 Dates Q;tober 1. 1991 Completed by: Cathie Mladen

/91-07 September 20, 1991 Reactor trip as a result of "B" Main Feedwater Regulating valvo closure and Automatic Safety Injection as a result of malfunctioning Steam Dump Syutem at 0513 hours0.00594 days 0.143 hours 8.482143e-4 weeks 1.951965e-4 months .

September 21, 1991 Unit entered Mode 2 at 0922 hours0.0107 days 0.256 hours 0.00152 weeks 3.50821e-4 months .

September 22, 1991 Commenced unit shutdown due to required corrective maintenance on Reactor Coolant System valve at 0122 hours0.00141 days 0.0339 hours 2.017196e-4 weeks 4.6421e-5 months . Unit entered Mode 3 at 0136 hours0.00157 days 0.0378 hours 2.248677e-4 weeks 5.1748e-5 months .- Unit entered Mode 4 at 0845 hours0.00978 days 0.235 hours 0.0014 weeks 3.215225e-4 months . Unit entered Mode 5 at 1345 hours0.0156 days 0.374 hours 0.00222 weeks 5.117725e-4 months .

September 24, 1991 Unit entered Mode 4 at 1622 hours0.0188 days 0.451 hours 0.00268 weeks 6.17171e-4 months .

September 25, 1991 Unit entered Mode 3 at 0125 hours0.00145 days 0.0347 hours 2.066799e-4 weeks 4.75625e-5 months . Unit entered Mode 2 at 1755 hours0.0203 days 0.488 hours 0.0029 weeks 6.677775e-4 months .

September 26, 1991 Unit entered Mode 1 at 1306 hours0.0151 days 0.363 hours 0.00216 weeks 4.96933e-4 months . Unit stable at 12%

l power at 1343 hours0.0155 days 0.373 hours 0.00222 weeks 5.110115e-4 months . Main Generator on-line at 1349 Unit stable at 30% power for Chemistry hold at hours.

1435 hours0.0166 days 0.399 hours 0.00237 weeks 5.460175e-4 months .

91-08 September 27, 1991 Commenced unit ramp-down to 7% power due to required corrective maintenance on "A" Station Service Transformer i at 1203 hours0.0139 days 0.334 hours 0.00199 weeks 4.577415e-4 months . Main Generator off-line at 1310 hours0.0152 days 0.364 hours 0.00217 weeks 4.98455e-4 months .

September 28, 1991 Main Generator on-line at 0514 hours0.00595 days 0.143 hours 8.498677e-4 weeks 1.95577e-4 months . Unit stable at 30%

power for Chemistry hold at 0630 hours0.00729 days 0.175 hours 0.00104 weeks 2.39715e-4 months . Commenced unit ramp-up to 45% tor QPTR at 0827 hours0.00957 days 0.23 hours 0.00137 weeks 3.146735e-4 months . Unit stable at 45% power at 0827 hours0.00957 days 0.23 hours 0.00137 weeks 3.146735e-4 months .

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Page 2 ~ . o f __2 UNIT SHUTDOWN AND POWER REDUCTIONS Explanation Sheet Docket No.: 50-339 Report Month Seotember Unit Name NA-2 Yeart 1991 Date October 1. 1991 Completed by: Cathie Mladen September 29, 1991 Commenced- _ unit ramp-up at 0600 hours0.00694 days 0.167 hours 9.920635e-4 weeks 2.283e-4 months . Unit ramp-up secured at 51% power due to "C": Main Feedwater Pump high vibrations.at 0615-hours.

Commenced unit ramp-down=to 45% powerL-- to secure "C" Main Feedwater Pump at. 1009

-hours.- Unit stable at .45% power at 1022 hours0.0118 days 0.284 hours 0.00169 weeks 3.88871e-4 months .

' Commenced unit ramp-up at 1140 hours0.0132 days 0.317 hours 0.00188 weeks 4.3377e-4 months .t. Unit stable at 85% -

l power-for, calorimetric at 1330--hours. . Commenced unit'.

. ramp-up to 100% power at 1407 hours0.0163 days 0.391 hours 0.00233 weeks 5.353635e-4 months . Unit stable at -100%

power at 1832 hours0.0212 days 0.509 hours 0.00303 weeks 6.97076e-4 months .

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'N-NORTH ANNA. POWER STATION UNIT NO. 2 MONTMt- September

SUMMARY

.0F OPERATING EXPERIENCE Page-1lof 3

-Listed below- in chronological sequence is a summary of operating experiences for this month which required load reductions or resulted in significnnt--non-load related incidants.

DA13- Zing Data September 01, 1991 -0000 Began month with unit at 100% power, 4 944MWe, September 06, 1991 0800 Commenced unit ramp-down_to 880MWe ;

for TVFT.

0830 Unit stable at 800MWo.

1010- TVFT completed satisfactorily.-

1020 Commenced unit ramp-up to- 100% :

-power.

, 1108- Unit stable at lug % power, 940MWo.

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Septumber 20, 1991 0513 Reactor trip as a result of dB" Main Feedwater Regulating Valve closure and: subsequent "B" steamegenerator- '

low ~ level -. coincident ' with a steam-flow greater than ' feed' flow mismatch.- Automatic _ Safety-Injection occurred as 'a~ result-of malfunctioning Steam Dump System and -

subsequent high- steam flow coincident with low Rea-tor Coolant System-(RCS) average temperature.

September 21',-1991 0922- Unit entered Mode 1.

September'22, 1991 -0122 Commenced- unit shutdown- due- to required corrective -maintenance _on RCS valve'(2-RC-83).

0136- Unit entered Mode ~3.

0845 Unit antered-Mode 4.

-1345 Unit entered Mode 5.

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NORTH ANNA POWI:R STATION UNIT No. 2 MONTH 8 l

_ff1LtcEL2DI EUMMARY QP OIIRNflR0_EXPERIINCI Pago 2 of 3 September 24, 1991 1622 Unit entered Hode 4.

September 25, 1991 0125 Unit entered Mode 3.

1755 Unit entered Mode 2.

Septe ber 26, 1991 1306 Unit entered Mode 1.

1343 Unit stable at 12% power.

1349 Main Generator on-line.

1435 Unit stablo at 30% power for Chemistry hold, Septomter 27, 1 1203 Commenced unit ramp-down to 7% power due to required corrective maintenance on "A" station Service Trt.nsformer.

0 1310 Main Generator off-lino.

Sc},tember 28, 1991 0514 Main Genera Jr en-line.

0630 Unit stable at 30% power for Chemistry hold.

0721 Commenced unit ramp-up to 45% power for OPTR.

0827 Unit stable at 45% power.

September 29, 1991 0600 Commenced unit ramp-up.

0615 Unit ramp-up uccured at 51% power due to "C" Main Feedwater Pump high vibrations.

1009 Commenced unit retnp-down to 45%

power to secure "C" Main Feedwater Pump.

1022 Unit stable at 45% power.

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NORTH ANNA POWER STATION UNIT No,t ?

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REMMalLY__Df_QPERhT1HQ_T4PIMIHCI Pago 3 of 3 1340 Commenced unit ramp-up.

1330 Unit stable at OtA power for caloriretric.

1407 calorimetric co. plated satisf actorily, commenced u. it ramp-up to 100% powur.

1832 Unit stable at 1001 power, 940MWo.

September 30, 1991 2400 Ended month with unit at 100% power, 951MWo.

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ML20085E998

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SUMMARY

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