ML20078F765

Monthly Operating Rept for Oct 1994 for Vermont Yankee Nuclear Power Station

ML20078F765
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	10/31/1994
From:	Reid D, Wallin G VERMONT YANKEE NUCLEAR POWER CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
VY-RCE-94-027, VY-RCE-94-27, NUDOCS 9411150375
Download: ML20078F765 (6)

Text

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,i VERMONT YANKEE NUCLEAR POWER CORPORATION

- ("b6 P.O. Box 157. Governor Hunt Road Vernon, Vermont 05354-0157

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(802) 257-7711 x L.s.

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.J November 10,1994 VY-RCE-94-027 U.S. Nuclear Regulatory Commission Attn:

Document Control Desk Washington, D.C. 20555

Reference:

a)

License No. DPR-28 (Docket No. 50-271)

In accordance with section 6.7.A.3 of the Vermont Yankee Technical Specifications, submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of October.1994.

Sincerely, Vermont Yankee Nuclear Power Corp.

l' (b a a C~ W(

Donald A. Reid Vice President, Operations cc:

USNRC Region I Administrator USNRC Resident Inspector - VYNPS USNRC Project Mananger - VYNPS

' C fi l' r y 9411150375 941031 PDR ADOCK 05000271 e

R PDR I

1 VERMONT YANKEE NUCLEAR POWER STATION MONTIILY STATISTICAL REPORT 94-10 FOR TIIE MONTII OF OCTOBER 1994 l

i l

j DP 0411 Rev. 5

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Page1 ofI l

1

OPERATING DATA REPORT DOCKET NO.50-271 DATE 941110 COMPLETED BY G.A.

WALLIN TELEPHONE (802)257-7711 OPERA' TING STATUS 1.

Unit Name:

Vermont Yankee 2.

Reporting Period:

October NOTES:

3. Licensed Thermal Power (MWt) :1593 4.

Nameplate Rating (Gross MWe) : 140 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:

N/A

9. 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

11. Hours in Reporting Period 745.00 7296.00 192120.00

12. Number Of Hours Reactor was Critical 672.13 7182.25 157679.66

13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00

14. Hours Generator On-Line 643.32 7137.49 155253.11

15. Unit Reserve Shutdown Hours 0.00 0.00 0.00

16. Gross Thermal Energy GeneratedfMWH) 975786.50 11137496.20 231843167.70 1"

Gross Electrical Energy Generated 326556.00 3729473.00 77248855.00 lo. Net Electrical Energy Generated :MNH) 311316.00

_J 5 5 813 2. 0 0 _23 4 0 515 6. 00

19. Unit Service Factor 86.35 97.83 80.10

20. Unit Availability Factor 86.35 97.83 80.10

21. Unit Capacity Factor (Usir MDC Net) 82.91 96.76 75.14

22. Unit Capacity Factor (Usir - DER Net) 81.30 94.88 73.68

23. Unit Forced Outage Rate 6.90 1.44 5.01

24. Shutdowns scheduled over next 6 months (Type, Date, and Duration of Each:

1995 Refuelino Outace scheduled to begin on March 18. 1995 and last for a six week period.

25. If shut down at end of report period, estimated date of startup:N/A

26. Units In Test Status (prior to commercial operation) : N/A Forecast Achieved j

INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATIOR VYDPF 0411.01 DP 0411 Rev. 5 Page 1 of 1 RT No. 13.F01.19F

AVERAGE DAILY UNIT POWER LEVEL

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DOCKET NO. 50-271 UNIT Vermont Yankee DATE 941110 COMPLETED BY G.A.

WALLIN TELEPHONE (802)257-7711 MONTH October DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

511 17.

367 2.

509 18.

510 3.

472 19.

519 4.

0 20.

516 5.

0 21, 515 6.

204 22.

516 7.

477 23.

516 8,

499 24.

516 9.

508 25.

516 10.

510 26.

341 11.

511 27.

388 12.

510 28.

509 13.

507 29.

516 14.

454

• 30.

516 15.

4 31.

513 16.

0

• 25 hour day 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.

I VYDPF 0411.02 DP 0411 Rev. 5 Page 1 of 1 RT No. 13.F01.18V

UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH OCTOBER DOCKET NO 50 - 2 71-UNIT NAME Vermont Yankqq DATE 941110 COMPLETED BY G.A. Wallin TELEPHONE (802)257-7711 1

2 3

4 5

No.

Date Type Duration Reason Method of License System Component Cause and Corrective (hours)

Shutting Event Code Code Action to Prevent Down Report #

Recurrence Reactor 94-11 941004 S

54.00 B

1 N/A EB INSTRU Vital AC auto bus transfer problem.

Repairs made to voltage regulator 94-12 941015 F

47.68 B

1 94-13 WB VALVEX Combination of Service Water leak on the heat exchanger and "B"

RBCCW bypass valve stuck open.

Line isolated, blanked off 94-13 941026 F

0.00 A

4 N/A HF FILTER Circulation water Power travelling screens Reduction damaged by excessive river debris.

Screens repaired 1

F: Forced 2 Reason:

3 Method:

4 Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data B-Maintenance or Test 2 - Manual Scram Entry Sheets for License C-Refueling 3 - Automatic Scram Event Report (LER) File D-Regulatory Restr

!_ on 4 - Other (Explain)

(NUREG 0161) l E-Operator Training and License Examination 5 Exhibit I - Same Source VYDPF 0411.03 F-Administrative DP 0411 Rev. 5 G-Operational Error (Explain)

Page 1 of 1 H- (Explain)

l DOCKET NO. 50-271

- ~

DATE 941110-COMPLETED BY G.A. WALLIN TELEPHONE (802)257-7711 REPORT MONTH

_ October

SUMMARY

OF OPERATING EXPERIENCES Hiohlights Vermont Yankee operated at 82.2% of rated thermal power for the month.

Gross electrical generation was 326.556 MWHe or B1.2% design electrical capacity.

Operatina 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 operating at 99.9%

of rated thermal power.

941003 At 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br />, initiated a power reduction for a scheduled mini-outage.

(See Unit Shutdowns and Power Reductions) 941004 At 0007 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />, the turbine-generator was removed from the grid.

941004 At 0335 hours0.00388 days <br />0.0931 hours <br />5.539021e-4 weeks <br />1.274675e-4 months <br />, the reactor was sub-critical.

941005 At 2119 hours0.0245 days <br />0.589 hours <br />0.0035 weeks <br />8.062795e-4 months <br />, the reactor was critical following the mini-outage.

941006 At 0607 hours0.00703 days <br />0.169 hours <br />0.001 weeks <br />2.309635e-4 months <br />, the turbine-generator was phased to the grid and a return to full power was initiated.

941014 At 1935 hours0.0224 days <br />0.538 hours <br />0.0032 weeks <br />7.362675e-4 months <br />, initiated a plant shutdown due to Technical Specification requirements, to blank off the "B" Reactor Building Closed Cooling Water bypass valve.

(See Unit Shutdowns and Power Reductions) 941015 At 0001 hours1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, the cooling towers were secured and the plant returned to an open cycle mode of operation.

941015 At 0210 hours0.00243 days <br />0.0583 hours <br />3.472222e-4 weeks <br />7.9905e-5 months <br />, the turbine-generator was removed from the grid.

941015 At 0457 hours0.00529 days <br />0.127 hours <br />7.556217e-4 weeks <br />1.738885e-4 months <br />, the reactor was sub-critical.

941016 At 1205 hours0.0139 days <br />0.335 hours <br />0.00199 weeks <br />4.585025e-4 months <br />, the reactor was critical following repairs.

941017 At 0151 hours0.00175 days <br />0.0419 hours <br />2.496693e-4 weeks <br />5.74555e-5 months <br />, the turbine-generator was phased to the grid and a return to full power was initiated.

941026 At 1007 hours0.0117 days <br />0.28 hours <br />0.00167 weeks <br />3.831635e-4 months <br />, initiated a power reduction to minimum recirculation flow to repair circulation water travelling screens damaged by excessive accumulation of river debris.

(See Unit Shutdowns and Power Reductions) 941027 At 0605 hours0.007 days <br />0.168 hours <br />0.001 weeks <br />2.302025e-4 months <br />, a return to full power was initiated following travelling screen repairs.

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

VYDPF 0411.04 DP 0411 Rev. 5 Page 1 of 1 RT No. 13.F01.18X