ML20064E385

Monthly Oper Rept for Oct 1978

ML20064E385
Person / Time
Site:	North Anna
Issue date:	10/31/1978
From:	Woods D VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML20064E384	List: ML20064E380 ML20064E385
References
NUDOCS 7811170109
Download: ML20064E385 (5)

Text

l VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH October YEAR 1978 I

SUBMITTED:

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7811170icci MAgR

OPERATLNG DATA REPORT DOCKET NO. 50-338 DATE 11-7-78 _

COMPLETED BY fi f' Wnds TELEPHONE 703-894-5151 x 360 OPERATING STATUS North Anna Not'5

1. Unit Name:

2. Reporting Period:

October 1978 .

i 2,775

3. Licensed Thermal Power (MWt): * " '

4. Nameplate Rating (Gross MWe): 94[

5. Design Electrical Rating (Net MWe):

90' -

6. Maximum Dependable Capacity (Gross MWe): 928

7. Madmum Dependable Capacity (Net MWe):

898

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

N/A

9. Power Level To Which Restricted.lf Any (Net MWe): N/A

10. Reasons For Restrictions,if Any: N/A

• * .p p.

This Month Yr. to Date cumulative

11. Hours in Reporting Period 745 3,553 3,553 679.4 3,242.1 3,242.1

12. Number Of Hours Reactor Was Critical k 13. Reactor Reserve Shutdown Hours 0 -

0 0

14. Hours Generator On-Line 657.2 3,211.4 3,211.4

15. Unit Reserve Shutdown Hours 0 0 0 l 16. Gross Therma! Energy Genersted (MWH) 1.750.627 8.379.826 R.379.R76 *

17. Gross Electrical Energy Generated (MWH) 560.197 , _ .

2.684.107 2.684.107

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

19. Unit Service Factor 88.2% 90.4% 90.4%

20. Unit Availability Facroe 88.2% 90.4% 90.4%

21. Unit Capacity Factor (Using MDC Net) 79.1% 78.9% 78.9%

22. Unit Capacity Factor (Using DER Net) 76.5% 76.4% 76.4%

23. Unit Forced Outage Rate 5.3% 1.4% 1.4% i

24. Shutdowns Scheduled Over Next 6 Months (Type. Date.and Duration of Eacht: .'

Snubber Inspection. April 1979. I week

25. If Shut Down At End Of Repor' ' riod. Estimated Date of Startup:

26. Units in Test Status (Prior to Coe mercial Operation); Forecast Achieved INITIAL CRITICALITY INITIAL El.ECTRICITY COMMERCIAL OPERATION (o/77) 1 l

-_ m,._ _ _ _ _ _ _ . _ _ _

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-338 UNIT # North Anna #1 1 /7/78 .

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- COMPLE1ID BY D. C. Woods 703-894 5151 x 360 TELEPHONE I

MONTH October DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL i I (MWe Net) (MWe Net) i 0 ,7 844

.0 840 2 1s 481 834 3 19 73 836 4 20 5

481 21 832 i

, 750 833  :

3 '

834 836 3

s 844 24 634 l

, 837 25 407 t

3, 785 820 26 839 823 33 3 12 847 28 R25 13 845 ;9 831 34 840 3a 828 044 830 15 31 1

' 845 16 e

INSTRUCTIONS On this format, list the average dady unit power tevelin MWe-Net for each day in the reporting month. Compute to the nearest whole megnvatt.

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UNIT SilUTDOWNS AND POWER REDUCTIONS g, io Anna 1 DATE Nov. 1_ 197R COMPLETED BY _A. C Plcufer_.

REPORT MONTil 0ctober TEt>ErilONE 703-894-5151 -x 229

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} Licensee $ *,

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., Cause & Corretlive

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Action to i No. Date g 3g f, , Event g? gu Prevent Recurrence H

fI 5 j p, Report # 'n U g

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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 9.0 A* 's 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 trip due to a loss of cooling water to "A" reactor coolant pump. Repaired faulty cooling water valve.

4 3 4 1 2 F: Forced Reason: Method: Exhibit G. instructions A Equipment Failure (Expl In) 1-Manual for Preparation of Data S: Scheduled B Maintenance of Test 2 Manual Scram. Entry Sheets for Licensee C. Refueling 3. Automatic Scram. Event Repost (LER) FileINUREG-D Regulatory Restriction 4-Other (Explain) 0161)

E-Operator Training & License Examination -

F-Administrative 5

" G Operational Error (Explain) Exhibit I . Same Sourge 07/77) II Other (Explain) ,

• See attached sheet.

t Paga 1 of 1 UNIT SHUTOOWN AND POWER REDUCTIONS i

EXPLANATION SPEET DOCKET NO. 50-338 REPORT tiONTH UNIT NAME North Anna YEAR 1978 DATE Nov. 1, 1978 COMPLETED BY A. G. Neufer -

NOTE: Shutdcwn 78-27 was concluded 10-3-78 at 0023. 48.7 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-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 consequence for autor.atic 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 valva was left open while the piping was pressured. The drain valve allowed water to spray in the vicinity of the containment valve

. 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-CC102-E, electricians found a broken mi.cro switch as well as moisture.

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

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