ML20005G467

From kanterella
Jump to navigation Jump to search
Monthly Operating Repts for Dec 1989 for North Anna Power Station Units 1 & 2
ML20005G467
Person / Time
Site: North Anna  
Issue date: 12/31/1989
From: Stewart W, Tillack B
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
References
NUDOCS 9001190193
Download: ML20005G467 (14)
v • d • e


Text

1 to o

VIRGINIA ELECTRIC AND power COMI'ANY RICHMOND, VIRGINIA 23261 January 15, 1990 I

i U. S. Nuclear Regulatory Commission Serial No.

90 012 Attention: Document Control Desk NO/JMJ:Jmj Washington, D.C. 20555 Docket Nos.

50 338 50 339 License Nos. NPF-4 I

NPF 7 i

l 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 December 1989.

Very truly yours, W. L. Stewar1 i

i Senior Vice President - Nuclear Enclosures cc:

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

Suite 2900 l

Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resident inspector North Anna Power Station L

[

9001190193 891231

{DR ADOCK0500g8 g\\

e. r. *,,.

se c.

VIRGINIA POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH DECEMBER YEAR 1989 APPROVED:

A' STATION Manauc.n I

O

.s

4

?

i OPERATING DATA REPORT DOCRET NO.

50-338 DATE 01-09-90 COMPLETED BY Eob Tillack TELEPHONE (703) 894-5151 X2632 0PERATING STATUS 1,-

Unit Namet North Anna 1 j

2.. Reporting Periodt DECEMBER 1989 3.

Licensed Thermal Power (MWt):

2893 14.1 Nameplate Rating (Gross MWe).

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

907 6

Maximum Dependable Capacity (Gross MWe):

963

'7.

Maximum Dependable Capacity (Net MWe):

915 8.

If Changes Occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report.

7 Give Reasons:

l I

-N/A 9.

Power Level To Which Restricted, If Any (Net MWe):

N/A

10. Reasons For Restrictions, If Any:

N/A r

P-This Month Yr.-to-Date Cumulative

'll.

Hours In Reporting Period 744 8,760 101,052-12L Number of Hours Reactor Was Critical 383.7 5,023.1 71,242.5

13. Reactor Reserve Shutdown Hours 511.5 146.3 6698.4 14'.

Hours Generator On-Line' 377.7 4.979.5 68,494.0

15. Unit Reserve Shutdown Hours 0

0 0

fE '

16.. Gross Thermal Energy Generated (MWH) 1.010,128 13,730,785 181,890,778

'17.. Gross-Electrical Energy Cencrated (MWH) 332.312 4.532,473 59,706,822

18. ' Net Electrical Energy Generated (MWH) 315,534 4.303,321 56.495,213 i

-19. - Unit. Service Factor 50.8 56.8 67.8

'20.-

Unit Availability Factor 50.8 56.8 67.8

21. Unit Capacity Factor (Using MDC Net) 46.4 53.7 62.6-
22.. Unit-Capacity Factor (Using DER Net) 46.8 54.2 61.6 23, Unit Forced Outage Rate 49.2 9.9 14.3 l24.

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

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

u_

-a-

.i AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-338 UNIT NA-1 DATE 01-09-90 COMPLETED BY Bob Tillack i

TELEPHONE-703-894-5151X2632 q.

. MONTH' December 1989 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 888 17 0

-2

'889 18 0

3 889 19 0

4 888 20 0

5 650 21 222 6

0' 22 674 i

7 0-23 908 8

0 24 911 9

0 25 893 1'

10 0

26 875 11 0

27 874 12 0

28 897 13 0

29 909 14 0

30 909 15 0

31 915 16 0

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.

4:..1

>{

- 7 UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET No.

50-338 UNIT NAME North Anna 1 DATE OI-09 REPORT MONTH DECEMBER 198)

COMPLETED BY Bob Tillack TELEPHONE (703) 894-5151 X2632 1

2 No.

Date Type Duration Reason Method of Licensee System C% a.a..t Cause and Corrective

    • I"*

(Hours)

Shutting-3

  • 4
  • 5 Down Reactor Report i Prevent Recurrence 89-05 891205 F

366.3 A

3 NAl-89-017-00 AB SG See Unit shutdown and power reduction Explanation Sheet.

1 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 Festriction 4-Continuations (NUREG-0161)

E-Operator Training / License Examination 5-Load Reduction F-Administrative 9-Other G-Operational Error (Explain) 5 11-Other (Explain)

Exhibit H - Same Source 4

~.,

w y.

y

.-.,,.,,.m

pm g, A

,y j

j 7

,u

+

i

,3 Page 1

of I

r i

LRi!T SHUTDOWN AND POWER REDUCTIONS

-[

EXPLANATION SEET DOCKET NO.

50-338 REPORT MONTH DECEMBER UNIT NAME NA-1 l

- YEAR -

1989 DATE 01-09-90 o

COMPLETED BY Bob T111ack i

89-05

AtL 2236. hours.on December 5,

1989, North Anna. Unit experienced an automatic reactor: trip from_ approximately 7 percent power.

The' reactor. trip occurred approximately 21 minutes following a loss of EHC pressure and resulting load reduction and approximately 16 minutes. following a manual shutdown'of the turbine.

i

^

The initiating signal for the reactor trip was a Low Low level in the "B" Steam Generator.

The EHC sSystem pressure -transient was caused by leaking turbine overspeed protection ' circuitry ;(OPC) valves.

The following EHC System modification and L;

replacements were implemented to enhance the reliability of the EHC System:

0P' C valves replaced.-

' EHC pumps were replaced with higher capacity pumps.

'* EHC reservoir was drained and cleaned.

-f

  • EHC fluid and filters were changed.

EHC suction strainer was replaced.

  • Four turbine throttle valve MOOG valves were replaced.

t

  • Number 1~ Governor Valve Actuator was replaced.
  • -Diaphragm seals were replaced on the "C"

EHC high pressure accumulator.

  • Extensive functional testing of the EHC system was performed by station engi_neering and the Westinghouse Technical representative.

An event investigation is being performed to determine additional EHC system upgrades.

Recommendations resulting from the event investigation will be evaluated and implemented as necessary.

Additionally the Source Range Nuclear Instrumentation (N-31 and N-32) failed to operate.-

Unit I was placed in Mode 5 (Cold Shutdown) to allow replacement of the Source Nuclear Instrumentation detectors. The detector for N-31 was replaced, the

crowbar circuit for Channel N-32 was reset, and both channels were returned to service-following satisfactory completion of functional testing.

~.

, y wy q

QgmA t

" L: WTA 4

C.

a

+

il c

L b

V NORTH ANNA POWER STATION i

e ll I

//

UNIT NO.

1 i

f

[I MOWnt DECEMBER I

.a

SUMMARY

OF OPERATING EKPERIENCE i.

[-

i bUf f

i ff Listed below in chronological sequence is a summary of operating I ~ f !"

experiences for.this month which required load reductions or resulted in O

significant non-load.related incidents.

cy, s

'l, 5 -

DATE TIME DATA i

![

December 1, 1989 0000.

Began month with Unit at 98%, 935 MW.

jf; Investigating and troubleshooting EHC

((

System.

l Il..

(

December 5, 1989 0930

. Commenced Unit. ramp down to 85% power, 815 1

}

FM for Governor Moog valve work.

1030 Holding Unit at 90% power, 860 MW.

1050 Shut #4 Governor valve to isolate EllC to Moog valve.

4 4

1107 Opened #4 Governor Valve and shut #3 Governor valve to isolate EllC to #3 Moog

valve, 1150 Holding at 85% power, 820 MW with #3 governor valve shut.

1255 Opened #3 governor valve.

1305 Commenced ramping unit to shut #1 governor valves.

1345 Secured ramp at 65% power, 625 FN.

1814 Lost 100 MW, steam dumps open.

1825 Steam dumps closed.

2113

  1. 2 Governor valve Moog and strainer replaced, opened #2 governor valve.
  1. 2 governor valve indicated 8% open on program,
  1. 3 governor valve 40% open.

7.

Q' W : %. _' *

> v

)

3

Q*f;A!

acq ; y c

~ i'

+ ' '

c;g'

+

4

,,9 tq: l~'

^

i 2135 Ramping down to match f3 governor valve with

  1. 2 governor. valve..

l TA, 5

2200 Secured ramp'at.approximately 30% power.

f

^

hg, 2214'

- Commencing Unit rampdown.

g, 2215:

  1. 3 governor valve went closed unit lost-300

<} e MW.-

6:.

..2220.

Opened G-12 breaker.-

2221-

. Manually tripped turbine, holding Reactor 4

s power at 7%.

d 2222 Hi Hi level in "C" Steam' Generator, feed-pumps tripped.

2236

- Rx trip on low-low level'in "B" Steam Generator.

g

December 6,'1989.

1032-Reset crowbar circuit on N-32, N-32 responding normally.-

j 1109 Entered Mode 4.

'2245 N-32 declared operable.

j

' December 7.1989 0641 Entered Mode 5.

December 8, 1989 1410-N-31' operable.

' [

December 20,.1989 0145 Entered Mode 4.

[

1013 Entered Mode 3.

1755 Commenced Reactor startup.

j r

2255 Reactor critical.

-j 2335 Reactor at point of adding heat.

~

December 21, 1989 0049 Unit stable at 3% power, commencing turbine

m.

roll up in Mode 2.

0346 Unit in Mode 1.

0434' Unit on line, s

0546 Unit stabilized at 30% power and holding chemistry.

2

[

+r r

-,yey.,

I;Fq

% g'

. J

?.

s c.;

s

<'t r

y JE

?",

3 December 22, 1989' 0405

, commence Unit ramp up.

~0739L Unit stabilized at 90% for chemistry hold.

1600

' Unit holding at 90% due to "C" main condenser water box out for maintenance on inlet MOV (1-CW-MOV-1010).-

/ jf 1731 "C"fwaterbox returned to service.-

h 11750i Commencing Ramp to 100% power.

i

-1830 Unit stabilized at 100% power, 1

December--25, 1989 1339 Steam generator chemistry-out of specification.

t 1428 Removed'"C" waterbox from service due to

}

suspected condenser inleakage.

-g.

1507 Commenced unit rampdown to stabilire vacuum due to removing "C" waterbox from service.

-i 1528 Vacuum increasing, secured ramp at 95.5%

s power.

]

ec December 26, 1989 1511

Repaired ruptured tube'in "C" waterbox, placed water box back in service.

i

' December. 27,'1989 1254 Still in chemistry hold, removed "C" waterbox from service for leak check.

=i

~1800 Returned "C" waterbox to service, removed t

"A" waterbox from service for icak check.

December 28, 1989 0550-Cleared chemistry' level I holds.

.}i 0612 Commenced ramp up to 100% power.

7 6

0655 Unit stabilized at 100% power.

-F December-29, 1989 1300 Returned "A" waterbox to service.

}

f

' December 31, 1989 2400 Ended month with unit at 100% power, 962 MW.

I 3

w

l,

?,..

s t

OPERATING DATA REPORT DOCKET No.

50-339 DATE 01-09-90 COMPLETED BY Bob Tillack TELEPHONE (703) 894-5151 X2632 OPERATING STATUS 1.= Unit Name:

North Anna 2 2.

Reporting Period:

DECEMBER 1989

'3,-

Licensed Thermal Power (MWt):

2893 4.

Nameplate Rating'(Gross MWe):

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

907 6.. Naximum Dependable Capacity (Gross MWe):

963

7.. Maximum Dependable Capacity (Net MWe):

915

8..If Changes Occur in Capacity Ratings (Items No. 3 thru 7) Since Last Report, Give Reasons N/A 9,1-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

' ll. : HoursEln Reporting Period 744 8760 79,320 c

12.

Number of Ilours Reactor Was Critical 744 6918.9 64.122.1

~13,. Reactor Reserve Shutdown llours 0

152.8 5,854.9 14 11 curs Generator On-Line 744 6887.7 63,251.9

15. Unit Reserve Shutdown lloura 0

0 0

16.; Gross Thermal Energy Generated (MWH) 2,152,113 18.805,348 168,146,347 17.

Gross Electrical Energy Generated (MWH) 709,966 6.213,888 55,005,517 il8.. ' Net Electrical Energy Generated (MWil) 676,340 5.896,509 52,838,832

-19.

Unit Service Factor 100 78.6 79.7

- 20.

Unit Availability Factor 100 78.6 79.7 21.

Unit Capacity Factor (Using MDC Net) 99.4 73.6 74.2

22. LUnit Capacity Factor (Using DER Net) 100.2 74.2 73.4 H
23.. Unit Forced Outage Rate 0

0 7.1 24.

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

1 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

'wggy.

n e

s,_

\\

L 3

AVERAGE DAILY UNIT POWER LEVEL DOCKET No. 50-339 UNIT NA-2 DATE 01-09-90 COMPLETED BY Bob Tillack TELEPHONE 703-894-5151X2632 MONTH' DECEMBER 1989 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1 912 17 909 2

912 18 907 3

912 19 907 4

912 20

'906 5

910 21 905-6 908 22 906 7

907 23 909 8

908 24 909 9

908 25 909 10 909 26 910 11 910 27 909 12 910 28 910 13 907 29 911 14 908 30 911 15 910 31 911 16 908 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.

mc.

_ c.

l 0.

l UNIT SHOTDOWNS AND POWER REDUCTIONS DOCKET NO.

50-339 INtIT NAME North Anna 2 DATE OI-09-90 REPORT MONTN DECEMBER 1989 CONFLETED BY Bob Tillack l

TELEPHONE (703) 894-5151 K2632 1

2 No.

Date Type Duration Reason Method of Licenece System Component Cause and Corrective (Hours)

Shutting Event Code Code

" *~

~

3 4

5 Down Reactor Report f Prevent Recurrence-NO ENTRY THIS M0hTH I

2 3

4 F: Forced Reason:

Method:

Exhibit F - Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data l

B-Maintenance or Test 2-Manual Scram.

Entry Sheets for Licensee C-Re fueling 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 G-Operational Error (Explain) 5 H-Other (Explain)

Exhibit H - Same Source

\\

i

~ _.., - -.. -. -.

<;, o

<e.,

+

e

~

6 Page 1

of 1

?

I UNIT SHUTDOWN AND POWER REDUCTIONS EKPLANATION SHEET DOCKET NO.

50-339 i

REPORT MONTH DECEMBER UNIT NAME MA-2 l

i YEAR 1989 DATE 01-09-90 i

COMPLETED BY Bob Tillack i

i

[.

NO ENTRY TilIS MONTH f

b I

f r

r t

1 1

v b

?

' ?,l

,n NORTH ANNA POWER STATION 9

UNIT NO.

2 MONTH DELEMBER

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 TIME DATA t

December l.

1989 0000 Began Month with Unit at 100% Power, 950 MW.

December 21, 1989

-1155 Commenced ramp down to 90% power, 880 MW for Turbine Valve Freedom Test.

1225 Unit stabilized at 90% power 880 MW.

1320 Completed Turbine Valve Freedom Test l

satisfactorily commencing ramp to 100%

1 power.

1400 Unit stabilized at 100% power, 952 FN'.

December 31, 1989 2400 Ended month with Unit at 100% power, 955 MW.

a

Retrieved from "https://kanterella.com/w/index.php?title=ML20005G467&oldid=4665820"