ML19263D720

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Monthly Operating Rept for Mar 1979
ML19263D720
Person / Time
Site: North Anna Dominion icon.png
Issue date: 04/04/1979
From: Wil Madison
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML19263D713 List:
References
237, NUDOCS 7904130185
Download: ML19263D720 (5)
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Text

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O VIRGINIA ELECTRIC Afl0 POWER COMPANY NORTH ANNA POWER STATION MONTHLY OPERATING REPORT MONTH nycw YEAR 1979 SUBMITTED:

N3 \ %A SUPERINIEDDENT - OPERATIONS APPROVED:

MANAGER)

YOU413c)(fs'

OPERATING D ATA REPORT DOCKET NO. en-3',

DATE 4-4-79 COMPLETED BY P- "idison TELEPHONE N 4-H94-5151 OPERATING STATUS Notes

1. Unit Name: tinrr h Anna Unie 1
2. Reporting Period: " we'h 1471
3. Licenwd Thermal Power (5 twt):

2775 .

4. Nameplate Rating (Gros Slwe): 947
5. Design Electrical Rating (Net SIWE):907
6. Slaximum Dependable Capacity (Gross 31We):

928

7. Slaximum Dependable Capacity (Net MWe)-

898

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

tuA

9. Power Level To Which Restricted. If Any (Net 5tWe): "o
10. Reasons For Restrictions,If Any: "n This Month Yr..to-Date Cumulative
11. Hours in Reporting Period 7M4 2. Inn 7.177 711 1.981.? 6,668
12. Number Of Hours Reactor Was Critical
13. Reactor Resene Shutdown Houg o 0 0 eoo n 1,939.9 6,591.6
14. Hours Generator On.Lir
15. Unit Resene Shutdown W trs n n n
16. Gross Thermal Energy Generated (MWH) 1 Ada 166 s 159 675 17 E?.470
17. Gross Electrical Energy Generated (MWH) en* n'n

_. 1,e4n,,1s s, san _nn, 559,410 1,553,280 5,217,860

18. Net Electrical Energy Generated (MWII) 93.9 89.8 91.8
19. Unit Service Factor 93 9 89 8 91 8
20. Unit Availability Factor 83.7 80.1 81.0
21. Unit Capacity Factor (Using MDC Net) 82.9 79.3 80.2
22. Unit Capacity Factor (Using DER Net) 6.1 7.4 3.1
23. Unit Forced Outage Rate
24. Shutdowns Scheduled Over Next 6 Months (Type. Date.and Duration of Each):

c.m u 9m ,a;~ .y 43 in,o , m t.

25. If Shut Down At End Of Report Period. Estimated Date of Startup: Ar i 1 10- 1979
26. Units In Test Status (Prior to Commercial Operation): Forecast Achiesed INITIA L CRITICALITY INITIAL ELECTRICITY COMM ERCIAL OPERATION to/77)

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Paget of 1 UNIT SilUTDOWN AND POWER REDUCTIONS EXPLANATION SIIEET DOCKET No. 50-338 REPORT MONTl! MARCII UNIT NAME NORTil ANNA YEAR _1979 DATE 4-2-79 COMPLETED BY ANDY NEUFER 79-3 (B) llydraulic fluid, used to control the main turbine govenor throttle, reheat and intercept valve began to leak from a joint in the pump discharge header. The unit was shutdown for reweld-ing of the leaking joint. At this time pipe hangers and shock mounts were added to prevent vibration due to pump oscillation (by design) total down time was 11.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />.

79-3 (4) The reactor was not shut down.

79-4 (B) A calculation of the unidentified primary coolant leak rate indicated a 1.95 GPM leak. Reactor power was reduced so that station personnel could enter the containment to evaluate and identify the cause of the leakage. Inspection team found PCV-1455B, a pressurizer spray valve packing gland to be blowing excessively. The valve was backseated and deenergized. The unidentified leak rate was recalculated and recorded as 0.57 GPM which is within the allowable < 1 GPM in accordance with plant technical specifications. When unit was at reduced load, the turbine valve f reedom test was performed.

79-4 (4) The reactor was not shut down.

79-5 (A)(1) Manual reactor turbine generator trip due to rapid pres-surizer level and pressure drop when the unit was ramped down due to loss of cooling water from "A" reactor coolant pump.

The solenoid on 1-TV-CC-102E burned causing the valve to fail closed. The coil was replacedand the valve was returned to service after testing.

NOTE: Shutdown 79-5 continued through end of March due to failure of turbine reheat stop valve No. 1 left. The valve could not be cycled.

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