ML20105A792

Monthly Operating Repts for Aug 1992 for NAPS Units 1 & 2

ML20105A792
Person / Time
Site:	North Anna
Issue date:	08/31/1992
From:	Bowling M, Kane G VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
92-588, NUDOCS 9209170254
Download: ML20105A792 (16)

Text

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'iQ VIItGINIA I5LECTHIC AND POWEH COMI%NY H IC.ll M O N D, Vilf ulN I A 20 2 01 September 11, 1992 U. S. Nuclear Regulatory Commission Serial No.

92 588

. Attention:i Document Control Desk NL&P/JV ' jm]

Washington, D.C. 20555 -

Docket 1 3.

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

' VIRGINIA-ELECTRIC AND POWER COMPANY

- NORTH-ANNA POWER STATION UNITS 1 AND 2 g

MONTHLY OPER ATING REPORT Enclosed is the Monthly _ Operating Report for North Anna Power Station Units 1 and 2 for the month of August 1992. Also enclosed are corrected pages to the July 1992 North Anna Units 1 & 2 Monthly Operating Report.

Very truly yours,

/$

M. L. Bowl ng, Manager -

J Nuc! ear Licensing and Programs Enclosure cc:

U.S. Nuclear Regulatory Commission 101 Marietta Street, NW -

Suite 2900 w

Atlanta, GA 30323 J

- Mr. M. S. Lesser NRC Senior Resident inspector North Anna Power Station l

}V 92o917o254 920831 U

PDR-ADOCK 0500o338 i

R-PDR j

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1 VIRGINIA POWER COMPANY NORTil ANNA POWER STATION MONTIILY OPERATING REPORT MONTil:

Autrust YEAR:

1992 u

t*f Approved:

N ' Station Manager

<j,'.

CFERATING DATA REP 02i DOCKET No.:

50-338 DATE: August 3, 1992 CONTACT: G. E. Kane PHONE: (703) 894 2101 OPERATING STATUS 1.

Unit Names...........

.... North Anna 1 2.- Reporting Period:...

... AUGUST 1992 3.

Licensed Thermat Power (MWt):.

2, 748 4.

Nameplate Rating (Gross MWe):..

947 5.

Design Electrical Rating (Net MWe):

907 6.

Maximum Dependable Capacity (Gross MWe):.,

894 7.

Maximum Dependable Capacity (het MWe):

848 8.'

If changes occur in' Capacity Ratings (Items No. 3 tnru 7) since last report, give reasons:_N/A 9 Power level to which restricted, if any (het MWe): _ N/A

10. Reasons for restrictions, it any:

N/A This Month Y-t 0 Cumulative

11. Hours in Reporting Period.....

744.0 5,855.0 124,427.0

-12. Number of Hours Reactor was Critical..

744.0 4,313.3 91,001.8

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

0.0 36.3 6,758.0

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

744.0 4,296.2 88,067.7

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

0.0 0.0 0.0

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

... 2,029,325.0 11.604,869.2 234,557,641.6

-17 Gross Electrical Energy Generated (MWH).

664,647.0 3,826,570.0 77,084,417.0

_15. Net Electrical Energy Generated (MwH)....

632.432.0 3,636,321.0 72,990,938.0

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

100.0%

73.4%

70.8%

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

100.0%

73.4%

70.8%

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

100.2%

71.3%

65.6%

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

93.7%

68.5%

64.7%

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

0.0%

0.0%

11.7%

24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration c' Each)_ Steam Generator Replacement and Refueling Outage, January 1993, approximately 120 days.

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

N/A

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

Forecast Achieved INIflAL CRITICALITY INITIAL ELECTRICITY CCMMERCIAL OPERAll0N

s 4

AVERAGE DAILY UNIT POWER LEVEL Dockot No.:

50-338 Unit:

NA-1 Date:

Scot.

3, 1992

Contact:

G.

E.

Kane Phone:

(703) 894-2101 MONTH:

August 1992 l

DAY AVERAGE DAILY POWER DAY AVERAGE DAILY LEVEL LEVEL (MWe-Net)

LEVEL (MWe-Net) 1 856 17 859 2

857 18 857 3

83 7 19 857 4

858 20 857 5

858 21 857 6

856 22 857 7.

858 23 856 8

859 24 858 9

859-25 857 10-859 26 856 11 858 27 856 12 814 28 856 13 791 29 855 14 795 30 857 15-808 31 856 16 859 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.

n

' DOCKET NO.:'

50-338' UNIT NAME:-

NA-1 DATE: Sept.

3, 1992 REPORT MONTH: Aug.-1992 CONTACT:

G.-E..Kane 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: Rearon 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)

UNIT SHUTDOWNS AND POWER REDUCTIONS F= Administrative 9=Other G= Operational Error 5:

H=Other (explain)

Exhibit H - Same Source

,3,,,

.:t : w m

t e

=

)

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Page 1

of

_1 UNIT SHUTDOWN AND POWER REDUCTIONS Explanation Sheet-Docket No.:-

50-338-Report Month Auoust -Unit Name:

NA-1 Year:- 1992

=Date: Sep_t.'3. 1992

. contact:

G.

E.

Kane

'- *No-entry this month.

T i

4 a

L

NORTH ANNA POWEh STATION UNIT NO.:

1 MONTH:

Aucust_

SUMMARY

OF OPERATING EXPERIENCE 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 August 01, 1992 0000 Began month with unit at 95% power, 898 Mwe.

August 12, 1992 0826 Commenced unit ramp-down to 90% power for TVFT.

0903 Unit stable at 90% power, 870MWe for TVFT.

-1003 TVFT completed satisfactorily.

1122 Removed "B" Main Condenser Waterbox from service for maintenance.

August 13, 1992 0559 Returned "B" Main Condenser Waterbox to service.

0852 Removed "A" Main Condenser Waterbox from service for maintenance.

August 14, 1992 0138 Returned "A" Main Condenser Waterbox to service.

0350-Removed "D" Main Condenser Waterbox from service for maintenance.

1817 Returned "D" Main Cor. denser Waterbox to service.

August 15, 1992 J032 Removed "C" Main Condenser Waterbox from service for maintenance.

1720 Returned "C" Main Condenser Waterbox to service.

1730 Commenced unit ramp-up to 95% power.

1817 Unit stable at 95% power, 900 MWe, Auguct 31, 1992

.2400 Ended month with unit at 95% power, 900 MWe.

i

.o3

. -g s

OPERAi!NG DATA REFORT E

DOCKEY No..

50 339 DATE: August 3, 1992 CONTACT: G. E. Kane i

PHONE: (703) 894 2101 CPERAi!NG STATUS 1.

Un i t N ane t...................

............Nortn Anna 2

- 2.. Report ing Per i od:........................ Augus t 1992

- 3.- Licensed Thermal. Power (MWt)...

2893 4.

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

947 5.

Design Electrical Rating (Net MWe):...

907 i

- 6.

MaxinJn Dependable Capacity (Gross MWe):.

957 7.= Maximum Dependable capacity (Net MWe):....

909 il j

8.

If changes occur in capacity Ratings (Items No. 3 thru 7) since last report, give reasons:

N/A 9.

Power.tevel to which restricted, if any (Net MWe): _ N/A

~

10. Reasons for restrictions, lf f any:

N/A 4

I This Month Y-t D Cumulative

- 11. Hours i n Report i ng Peri od................

744.0 5,855.0 102,695.0

.12. Nwter of Hours Reactor was Critical...................

721.4 4,379.3 84,115.2 13.' Reactor Reserve Shutdown Hours........................

22.1 187.0 6.244.4 14, Hours Generator On Line...............

701.8 4,309.7 83,084.1

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

-0.0 0.0 0.0 16.-Gross Thermat Energy Generated (MWH)..................

1,979,413.6 11,847,232.4 223,664,365.5

17. f:rcss Electrical Energy Generated (MWH)....

645,295.0 3,881,855.0 73,261,981.0

'18. Net Electrical Energy Generatec (MkH)........

612,247.0 3,684,234.0 70,183,967.0

19. Unit Service factor.................

94.3%

73.6%

80.9%

20, Unit Avaltability Factor.................................

94.3%

73.6%

80.9%

j

21. Unit Capacity Factor (using MOC Net).

90.5% -

69.2%

75.9%

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

90.7%-

69.4%

75.3%

5.7%

1.6%

5.8%

23' ced Cutage Rate................

24.-Shutdowns Scheduled Over N=xt 6 Months (Type, Date, and Ouration of Each):_N / A

25. If thutoown at end of Report period, estimated time of Startup:

N/A

- 26 Units in Test Status (Prior to coninerciat Operation):

Forecast Achieved INit!AL CRITICAL 11Y INITIAL ELECTRICITY COMMERCIAL OPERAil0N i'.

f.,.,

' i,.

cf f4 AVERAGE DAILY UNIT POWER-LEVEL y:

i.

Docket No.:

50-339-

' Unit: L NA-2 Date:

.Seot.

3.

1992-

Contact:

G.

E.

Kane-Phone:

(703) 894-2101 i

MONTH: - Auciust - 1992 -

s 1

DAY-AVERAGE DAILY POWER DAY AVERAGE DAILY LEVEL

-LEVEL'(MWe-Net)'

. LEVEL (MWe-Net)

. l' -

902-17 898

2 --

903 18-898

- 3..

'902 19.

898 903

-20 883 5"

9_03 21 898 6

296-22 898

7 0

-23 899 8-165 24 899-

.9-803

25 898-10:

894^

26 897-11 1-

=8 9 5 --

-27 898 12' 896-28~

899' 113 898 29 899 114

-898 30 899 898 31' 899 16 898-Instructions:

1 :-

'On"this-format, list-the average daily unit power-level in MWe-l L

- Net.for'each day in the reporting month.

Compute to the~ nearest L

whole megawatt.

m

UNIT SHUTDOWNS AWD POWER 1"'DUCTIONG DOCKET NO.: 339 UNIT NAME:

NA-2 DATE: Sept.

3, 1992 REPORT MONTH: Aug. 1992 CONTACT:

G.

E.

Kane' 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 Prevent Recurrence Down Reactor Report /

92-05 920806 F

42.3 A

3 92-007 SB ISV Rx Trip /SI due to "C" Main Steam Trip Valve failing closed.

1 3: Method 4:

1: Type 2: Reason F= Forced A= Equipment Failure (explain) 1= Manual Exhibit F - Instructions 2= Manual Scram for preparation of Data S= Scheduled B= Maintenance or Test 3=Autonatic Scram Entry Sheets for Licensee C= Refueling 4= Continuations Event Report (LE9) File D= Regulatory Restriction E= Operator Training & License Examination 5=Lo& l Reduction (NUREG-0161) 9=Other F= Administrative 5:

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

Page 1

of __1 UNIT SHUTDOWN AND POWER REDUCTIONS Explanation Sheet Docket No.:

50-339 Report Month Aucust Unit Name:

NA-2 Year:

1992 Date: Sept.

3, 1992

Contact:

G.

E.

Kane

1. 92-05 On August 6, 1992, at 0751 hours0.00869 days <br />0.209 hours <br />0.00124 weeks <br />2.857555e-4 months <br />, with Unit 2 at 100 percent power (Mode 1), the "C" main steam trip valve (MSTV) failed shut causing a safety injection and reactor trip.

The initiating signal for the safety injection was high steam line flow coincident with low steam line pressure in two out of three main steam lines.

The cause of the "C" MSTV closure has been attributed to failure of the "C" MSTV air cylinder rupture disc.

Following the trip pressurizer gPZR) level indication went offscale high due to the SI flow and letdown isolation.

Once this occured fluctuation in PZR pressure

-and PZR pressure master controller response led to cycling of one of the PZR power operated relief valves (2-RC-PCV-2455C which is controlled by the master controller).

It should be noted that RCS pressure never reached the setpoint (2235 psig) for PORV actuation.

The rupture discs on the "C" MSTV air cylinders were replaced, and the rupture discs associated with the other two MSTV's were inspected.

Post maintenance testing was completed to ensure all rupture discs and control circuitry were operable.

An evaluation will be performed to determine if it is prudent to replace current rupture discs with discs that have better operating margins.

I su

l NORTH ANNA POWER STATION UNIT NO.:

2 MONTH:

August

SUMMARY

OF CPERATING 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 August 01, 1992 000L Began month with unit at 100% power, 899 MWe.

L August 06, 1992 0751 Rx Trip /SI on High Steam flow coincident with low steam pressure.

Entered 2-E-0, 0756 Entered EPIP's, declared NOUE.

0802 Transitioned to 2-ES-1.1, "SI Termination".

0804 Secured "C" HHSI pump (2-CH-P-1",'.

0806 PZR level indication off scale high, PZR PORV (2-RC-PCV-2455C) cycled in response to master pressure controller high output.

0808 Secured LHSI pumps (2-SI-P-1A,1B).

.0809 Discovered "C" Main Steam Trip Valve air cylinder diaphragm ruptured.

0850 Terminated NOUE.

1829 "C"

MSTV repaired and declared operable.

August 7, 1992 0540 Commenced Rx Startup.

0559 Entered Mode 2.

0628 Rx critical.

0646 Rx at point of adding heat (POAH) and holding for chemistry.

August 8, 1992 0110 Released from chemistry hold.

0123 Entered Mode 1.

0207 Unit on line.

0305 Stabilized at 30% power for chemistry hold.

\\

l 1

l

SUMMARY

OF OPERATING EXPERIEl"E Page 2 of 2 i

f

-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.

I Date Time Data August 8, 1992 2400 Cleared chemistry hold.

August 9, 1992 0017 Commenced ramp up to 100% power.

0832 Unit stabilized at 99.4% power, #4 governor valve full open.

August 12, 1992 1715 Throttled open bypass on first point feedwater heaters to boost Rx power to 100%.

1821 RX power at 100%, 900 MWe, August 31, 1992 2400 Ended month with unit at 100% power, 899MWe.

i

~

I A

4 Correction to July 92 Operating Report

\\

The date reported in the Unit 1 and 2 " Summary of Operating Experience" for the fire at the Intake Structure was reported incorrectly.

The actual date for the fire was 29 July 1992.

Please see the attached corrected Unit 1 and 2

" Summary of Operating Experience" Reports.

t I

h

__________________-__.___________.-___________s___-

d.

NORTH ANNA POWER STATION

~

GNIT NO.:

1 MONTH:

_ July SUJIMARY OF OPERATING EXPERTENCE 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 July 01, 1992 0000 Began month with unit at 95% power, 907Mwe.

July 11,-1992 0815 Commenced unit ramp-down to 870MWe for TVFT.

0039 Unit stable at 870MWe for TVFT.

1027 TVFT completed satisfactorily.

1031 Commenced unit ramp-up to 95% power.

1116 Unit stable at 95% power, 901MWe.

July 18, 1992 0014 Commenced unit ramp-down to approximately 90%

power for repairs to A condenser waterbox.

0053 Unit stable at 90% power, 822MWe, July 19, 1992 0609 Commenced unit ramp-up to 95% power following repairs to A condenser waterbox.

0830 Unit stable at 95% power, 904MWe.

July 23, 1992 0009 Commenced unit ramp-down to approximately 90%

power for repairs to condenser waterboxes.

0100 Unit stable at 89% poder, 850MWe.

July.26, 1992 0205 Commenced unit ramp-up to 955 power following repairs to B, C,

and D condentar waterboxes.

0306 Unit stable at 95% power, 906MWo.

July 29, 1992 0412 Fire reported at Intake Structure.

0425 Initiated " Notification of Unusual Event" due to fire lasting greater than 10 minutes.

0431 Fire extinguished.

0459 Terminated " Notification of Unusual Event."

July 31, 1992 2400 Ended month with unit at 95% power, 898MWe.

l l

1

NORTH ANNA POWER STATION UNIT N0.: _2 MONTH:

July

SUMMARY

OF OPERATING EXPERIENCE 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.

DJLtc Time DAtil July 01, 1992 0000 Began month with unit at 100% power,

953MWe, July 29, 1992 0412 Fire reported at Intake Structure.

0425 Initiated " Notification of Unusual Event" due to fire lasting greater than 10 minutes.

0431 Fire extinguished.

0459 Terminated " Notification of Unusual y

Event."

July 31, 1992 0840 Commenced unit ramp-down to 890MWe for TVFT.

0910 Unit stable at 889MWo for TVFT.

1230 TVFT completed satisfactorily.

1320 Commenced unit ramp-up to 100%

power.

1502 Unit stable at 100% power, 904MWe, 2400 Ended month with unit at 100% power,

899MWe, 4