ML20064H505

Monthly Oper Rept for Oct 1978

ML20064H505
Person / Time
Site:	North Anna
Issue date:	11/01/1978
From:	Woods D VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20064H490	List: ML20064H483 ML20064H492 ML20064H505
References
NUDOCS 7812200257
Download: ML20064H505 (5)

Text

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VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH Oct. YEAR 1978 (Revised December 5,1978) 1 i

SUBMITTED:

ND _ r,%

SUPEMuIENDENT - STATION OPERATIONS' APPROVED:

MANAh 7812200257

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t OPERATING DATA REPORT DOCKET NO. 50-338 DATE 33-/-/8 COMPLETED BY D. C. Woods TELEPHONE 7n't AQA 'il51 x 360 OPERATING STATUS North Anna Notes

l. Unit Name: '

2. Reperdag Period. October 1978 2,775

3. LiesmeadThenmalPower(MWt): '

4. Namupiste Radng (Gross MWe):

947 -

5. Desips D.carisal Rathag (Not MWe): 907 . ,

6. Maximusa C ,

Capacity (Gross MWe): 928

7. Maximum C.;

": Capacity (Not MWe): 898

8. If Changes Occur in Capacity Ratings (Items Number 3 Tiuoegh 7) Since Last Report, Give Reasons:

N/A

! 9. Power Level To which Restricted,if Any (Net MWe): N/A

' 10. Renssen For Restrictions,if Amy: N/A

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• This Month Yr to.Dete Cumeistne 745 3,553 3,553 I1. Hoers la Repordng Period b/9.4 3.242.1 3.242.1

12. Number Of Hours Reacter Was Critical 0 0 0

13. Reactor Romerve Shutdown Hours

14. Hours Generator On.Une 657.2 3.211.4 L911 a

15. Unit Reserve Shutdown No.,. 0 0 o

16. Gross Thermal Energy Generated (MWH) 1,750,627 M .826 8.379.R76

17. Gross Electncal Energy Generated (MWH) 560,197 ,_.

2.634.107 2.684.107

18. Net Electrical Energy Generated (MWH) . 528,766 2.517.863 2.517.863

19. Unit Semco Facto, 88.2% 90.4% 90.4%

20. Unit Avaanbdity Factor 88.2% 90.4% 90.4%

21. Unit Capacity Factor (Using MDC Net) 79.0% 78.9%_ 78.9%

22. Unit Capacity Factor (Using DER Net) 78 34 7R_1Y 7R 1%

1 23. Unit Forced Outage Rate 5.66% 1.5% 1.5%

24. Shutdowns Scheduled Over Next 6 Months (Type. Dete.and Durstma of Each): .'

25. If Shut Down At End Of Report Period. Estimated Date of Startup:

26. Units In Test Status (Prior ta Comnwrcial Operation): Forecast Achieved

INITIAL CRITICAUTY 4

INITIAL ELECTRICITY COMMERCIAL OPERAT10N M77)

-.g ---m-n ,,-.n. gy,-,. .--- -

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-338 f UNIT North Anna #1

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DAM II/7/70

.. ND BY 0. C. Woods TELEPHONE 7012894-518i1__ x 360

. youm October DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Nm) (MWe Nm) 0 ,,

844 2 0 is 840 3 #91 is 834 4 73 20 836 5

481 832 21 6

750 833 22

- 834 836 7 23 844 634 s 24 837 407 9 25 785 820 to 2, 13 839 27 823-

!2 847 825 23 845 831 13 29 840 828 14 3, 15 844 3 830 16 845 INSHUCITONS On this fermat, list the average dady unit power levelin MWe Net for each dayin the reporung month. Compute to the nearest whole rnegawatt.

i (9/77)

DOCKET NO.

UNIT SIIUTDOWNS AND POWER REDUCTIONS Nntth anna 1 UNIT NAME DATE IQY - 1 147A October COMPLETED 8Y . G. Neufer REPORT MONTil TEl,EPil0NE 703-894-5151 x 229

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• E ~> l_icensee Ee ' ' ",, Cause & Corrective No. Date H

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s 3$M

., 5 g Event Report #

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Action to Psevent Recurrence 5

78-28 781003 F 12.3 B 4* Manual Shutdown to repair blown plug on high pressure turbine cross under pipe rewelded returned to power.

78-29 781004 F 11.4 A* 3 High flux rate 2/4 channels caused reactor trip due to fault in a gain pot.

78-30 781024 F 15.7 A* 1 Manual reactor / turbine / generator trir due to a loss of cooling water to "A' reactor coolant pump. Repaired faulty cooling' water valve.

I 2 3 4 F: Forced Reason: Method: ExhiblI G - Instructisms 5: Scheduled A-Equipment Failure (Explatn) 1-Manual for Prepasation of Data B-Maintenance of Test 2 Manual Scram. Entry Sheets for Licensee C Refueling 3 Automatic Scram. Event ReporI (LER) File (NUREG-D-Regulatory Restricthm 4-Other (Explain) 0161)

E-Operator Training & Ucenx Examinallon i F-Administrative 5 G4)perational Error (Explain) Exhibit I - Sanw Source l W/77) 11 Oth-r (Explain)

• See attached sheet.

Pag 2 i or i UNIT SHUTDOWN AND POWER REDUCTIONS EXPLANATION SHEET DOCKET NO. 50-338 REPORT MONTH October UNIT NAME North Anna YEAR 1978 DATE Nov. 1, 1978 COMPLETED BY A. G. Neufer NOTE: Shutdown 78-27 was concluded 10-3-78 at 0023. 48.4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

78-28 (4) Reactor was not shutdown.

78-29 (A) While power range nuclear instrumentation channel N-44 was in the trip mode due to maintenance, operator attempted to adjust remaining 3 NIS channels in accordance with calorometric data when adjust knob locking device was released. A voltage spike occurred causing a high flux rate trip in channel N-41.

This made up the 2/4 ccnsequence for automatic reactor trip.

78-30 (A) The reactor was manually tripped by the operator from 100%

power due to a loss of cooling water to "A" reactor coolant pump. After the Rx was tripped, the reactor coolant pump was shutdown to preclude pump damage. Subsequent to the occurrence, a section of charging and volume control piping was being returned to service. A drain valve was left open while the piping was pressured. The drain valve allowed water to spray in the vicinity of the containment valve g' penetration area. 1-TV-CC-102E "A" reactor coolant pump component cooling outlet valve was in the area. 1-TV-CC-102-E went closed at about the same time causing low CC flow alarm alerting the operator. Upon inspection of 1-TV-CC102E, electricians found a broken micro switch as well as moisture.

Either problem could have caused the valve to short out and close.

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