ML20051N548

Monthly Operating Rept for Apr 1982

ML20051N548
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	05/10/1982
From:	Burger F VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20051N485	List: ML20051N453 ML20051N548
References
NUDOCS 8205170359
Download: ML20051N548 (7)

Text

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VERMONT YAMKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 82-04 FOR THE MONTH OF APRIL 1982 f

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82051703 S'9

OPERATING. DATA REPORT DOCKET NO.

50-271 DATE 820510 COMPLETED BY F.J. Burger TELEPHONE (802) 257-7711 ext. 137 OPERATING STATUS tes

1. Unit Name: Vermont Yankee

2. R: porting Period:

April 1982

3. Licensed Thermal Power (MWt):

1593

4. Nr.meplate Rating (Gross MWe):

540

5. Design Electrical Rating (Net MWe): 514(OC) 504 (CC)

6. Maximum Dependable Capacity (Gross MWe):

535

7. Maximum Dependable Capacity (Net MWe):

504

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

9. Power Level to Which Restricted,If Any(Net MWe):

10. Reasons For Restrictions, If Any:

This Month Yr-to-Date Cumulative

11. Hours In Reporting Period 719.00 2,879.00

12. Number Of Hours Reactor Was Critical 699.88 2,792.21 67,870.36

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 696.70 2,744.88 65,786.07

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy Generated (MWH) 1,077,390.00 4,320,211.00 94,235,971.50

17. Gross Electrical Energy Generated (MWH) 363,477.00 1,466,409.00 31,338,380.00

18. Nat Electrical Energy Generated (MWH) 348,771.00 1,406,429.00 29,722,715.00

19. Unit Service Factor 96.90 96.38 78.11

20. Unit Availability Factor 96.90 96.38 78.11

21. Unit Capacity Factor (Using MDC Net) 96.25 96.93 70.02

22. Unit Capacity Factor (Using DER Net) 94.37 95.04 68.66

23. Unit Forced Outage Rate 3.10 3.62 6.67

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

None

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 r

COMMERCIAL OPERATION

io AVERAGE-DAILY UNIT POWER LEVEL 50-271 DOCKET NO.

Vermont Yankee UNIT 820510 DATE COMPLETED BY F. J. Burger TELEPHONE (802) 257-7711. Ext. 137 MONTH April DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

364 17.

sig 2.

491 18.

s17 f

3.

517 19.

520 4.

516 20.

520 5.

520 21.

519

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6.

519 22.

520 7.

513 23.

520 8.

514 24.

23 4

519 25, 328 j

9.

519 26.

467 10.

11.

27.

443 504 12.

28.

511 518 519 13.

29.

519 14.

30.

15.

31.

l 519 16.

j 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.

UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET No 50-271

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UNIT NAME Vermont Yankee DATE R?ns10 REPORT MONTH April COMPLETED BY F.

J.

Burger TELEPHONE (802) 257-7711. Ext. 137 i

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u Cause & Corrective

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@4 En No.

Date e

o eo Action to i

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euo eport#

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0 82-07 820411 S

0 B

4 N/A RB CONROD Power reduction for a control rod pattern (Power adjustment and surveillance testing.

Reductic n) 820424 F

22.3 A

3 N/A CH INSTRU Reactor scrammed on low reactor vessel 82-08 g j

level due to a failure in thd feedwater.

control system. An investigation revealed dirt in the air circuit of the "A" feed-water regulator valve pneumatic current-to-pressure converter. This caused an in-correct valve position signal to be initiated.

The converter was replaced.

The preventive maintenance program for this equipment will be reviewed and revised as necessary to prevent recurrence.

1 F: Forced Reason:

Methcd:

Exhibit G-Instructions S: Schedule'd 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 Restriction 4-Other (Explain)

(NUREG 0161)

E-Operator Training & License Examination 5

F-Administrative Exhibit I - Same Source G-Operational Error (Explain)

H-Other (Explain)

DOCKET NO.

50-271 Vermont Yankee UNIT

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r' 820510 DATE COMPLETED BY F. J. Burger IELEPHONE (802) 257-7711, Ext. 137 SAFETY RELATED MAINTENANCE Page 1 of 2 NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINrENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION RWCU Valve V12-16A Corrective N/A Position Indicator Faulty Position Realigned Indicator MR 82-0332 Out of Alignment Indication RWCU Pump P49-1B Corrective N/A Normal Wear Pump / Motor Realigned Coupling MR 82-0358 Coupling Misalignment Service Water Pumps Corrective N/A Normal Wear Packing Leakage Repacked Pumps P71A-D MR 82-0367 MR 82-0386 MR 82-0477 Reactor Vessel Pressure Corrective N/A Sticky Me".er Indicator Adjusted Meter indicator PI 2-3-56B MR 82-0383 Movement Sticks Movement RHR Service Water Preventive N/A N/A N/A Replaced Bushings in Pump P8-lC MR 82-0419 Response to Vendor Lettet 4ain Steam Line Corrective N/A Indicator Out of Indicator Read-Recalibrated ladiation Monitor MR 82-0450 Calibration ing Low, Set

hannel "C" Point Unaffected

DOCKET NO.30-271 Vermont Yankee UNIT 820510 DATE COMPLETED BY F. J. Burger (802) 257-7711, Ext. 137 TELEPHONS SAFETY RELATED MAINTENANCE Page 2 of 2 NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION prywell Pressure Transmitters Preventive N/A N/A N/A Replaced with Upgraded

'T 16-19-29A & B FH1 82-0452 Instruments LPIS Power Supply Corrective LER Failed Output Replaced Power Supply MR 82-0471 82-08/3L Components Deteriorated IPS "A" Corrective N/A Loose Connection Alarm Condi-Tightened Connection MR 82-0474 tion,0pera-bility Unaffected

<0G Steam Supply Valve Corrective N/A Normal Wear Packing Leak Adjusted Packing

>G-9072 MR 82-0481

'CIS Relay 16A-K8A Preventive N/A Worn Relay Noisy Replaced Components MR 82-0496 Components

& Odoriferous as Necessary

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DOCKET NO.

50-271 Vermont Yankee UNIT 820510 DATE

"#8"#'

COMPLETED BY TELEPHONE (802) 257-7711, Ext. 137 REPORT MONTH April

SUMMARY

OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 94.06%of rated thermal power for the month.

Gross electrical generation was 363,477 MWH or 93.61% of design electrical capacity.

Operating Summary The following is a chronological description of plant operations including other pertinent items of interest for the month:

At the beginning of the reporting period the plant was at 55% of rated thermal power. A power ascension was in progress recovering the reactor scram of 820330.

820411 At 0030 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> a power reduction was intiated for control rod pattern adjustment and surveillance testing.

At 0120 hours0.00139 days <br />0.0333 hours <br />1.984127e-4 weeks <br />4.566e-5 months <br /> a return to full power was started.

820424 At 0059 hours6.828704e-4 days <br />0.0164 hours <br />9.755291e-5 weeks <br />2.24495e-5 months <br /> the reactor scrammed (See Unit Shutdowns and Power Reductions).

At 2006 hours0.0232 days <br />0.557 hours <br />0.00332 weeks <br />7.63283e-4 months <br /> the reactor was critical.

At 2315 the turbine was phased onto the grid.

At the end of the reporting period the plant was operating at 99.9% rated thermal power.