ML20082B563
| ML20082B563 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 06/30/1991 |
| From: | Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| VYV-91-145, NUDOCS 9107150355 | |
| Download: ML20082B563 (6) | |
Text
_ _ _ _.._ ___
YERMONT YANKEE
' NUCL, EAR POWER CORPORATION
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P=O. Box 157, Governor Hunt Road
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Vernon, Vermont 05354-0157 lf s
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(802) 257 7711 s
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July 10,1991 VYV-91-145 U.S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555
Dear Sir:
Submitted herewith is the Monthly Statistical Report for the VermoI1t Yankee Nuclear Power Station for the month of June,1991.
$i Very truly yours, VERMONT YANKEE NUCLEAR POWER CORP.
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9WL Wai en P. Murphy /q[
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Senior Vice Presideht, erations cc:
1)
USNRC Region I 475 Allendale Road King of Prussia, PA 19406 2)
USNRC Resident inspector, VYNPS DP 0411 Rev. 3 Page 1 of 1
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VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 91-06 FOR THE MONTH OF JUNE, 1991 I
l.
l DP 0411 Rev. 3 Page 1 of 1 I
l OPERATING DATA REPORT DOCKET NO.
50-271 DATE 910710 COMPLETED BY G.A.
WALLIN TELEPHONE (8021257-7711 QPERATING STATUS
- 1. Unit Name Yermont Yankee
- 2. Reporting Period:
June _
NOTES:
- 3. Licensed Thermal Power (MWt):1593
- 4. Nameplate Rating (Gross MWe):
hiR
- 5. Design Electrical Rating (Net MWe):
514foc) 504(cc)
- 6. Maximum Dependable Capacity (Gross MWe):
ill
- 7. Maximum Dependable Capacity (Net MWe):
- 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(Not MWe):
N/A
- 10. Reasons for restrictions, if any:
N/A This Month Yr-to-Date Cumulative
- 11. Hours in Reporting Period 720.00 4343.00 162863.00
- 12. Number Of Hours Reactor was Critical 608.15 3990.85 132179.48
- 13. Reactor Reserve Shutdown Hours 0.00_
0.00 0.00
- 14. Hours Generator On-Line 596.73 3939.98 129311.51
- 15. Unit Reserve Shutdown Hours 0.00 0.00 0.00
- 16. Gross Thermal Energy Generated (MWH) 939806.00_ 6204065.50 191519370.50
- 17. Gross Electrical Energy Generated 307888.00 2977779.00 63825274.00
- 18. Net Electrical Energy Generated (MWH) 289652.00 1984264.00 60616234.00
- 19. Unit Service Factor 82.88 90.72 78.58
- 20. Unit Availability Factor 82.88 90.72 7321H
- 21. Unit Capacity Factor (Using MDC Net) 79.82 90.65 73.0%
- 22. Unit Capacity Factor (Using DER Net) 78.27 88.89 71.66
- 23. Unit Forced Outage Rate 17.12 9.28 5 11 24, Shutdowns scheduled over next 6 months (Type, Date, and Duration of Each:
N/A
- 25. If shut cown at end of report period, estimated date of startup: N/A
- 26. Units In Test Status (prior to commercial operation): N/A Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 DP 0411 Rev. 3 Page 1 of 1 RT No. 13.F01.19F
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s AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
50-271 UNIT Yernont Yankee DATE 21Q210 COMPLETED BY G.A. WALLIN TELEPHONE (802)257-7711 MONTH June-DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)
(MWe-Net) 1.
496 17.
0 2.
499 18.
0 3.
500 19.
0 4.
497 2 0. -
0 5.
499 21.
302 6.
498 22.
488
.7.
496 23, 491
-0.
494 24.
491 9.
491 25, 489 10.
490 26.
486 11, 490 27.
487 12.
492 28.
483 13.
495 29.
482 14, 491 30.
488 15.
454 31.
16.
O INSTRUCTIONS:
On this format, list the average daily unit power level in MWE-Net c each day in the reporting-month.
Compute to the nearest whole megawatt.-
VYDPF 0411.02 DP.0411 Rev. 3 Page 1 of 1 RT No. 13.F01.18V
a UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 REPORT MONTH JUNE UNIT NAME Vermont Yankee DATE 910710 COMPLETED BY G.A. Wallin TELEPHONE (8021257-7711 i
i 1
2 3
No.
Date Type Duration Reason Method of License System Component Cause and Corrective (hours)
Shutting Event Code Code Action to Prevent Down Report #
4 5
Recurrence Reactor 91-07 910615 F
123.27 H
3 91-14 EA ZZZZZZ Turbine trip / reactor scram due to a generator full load reject caused by lightning.
3 Method:
4 Exhibit G-Instructions 1
F: Forced 2 Reason:
S: Scheduled A-Equipment Failure (Explain) 1 - Manual for Preparation of Data B-Maintenance or Test 2 - Manual Scram Entry Sheets for License 3 - Automatic Scram Event Report (LER) File C-Refueling D-Regulatory Restriction 4 - Other (Explain)
E-Operator Training and 5 Exhibit I - Same Source License Examination VYDPF 0411.03 F-Administrative DP 0411 Rev. 3 G-Operational Error (Explain)
Page 1 of 1 H-(L'xplain)- lightning l
l
e-A-e_-o DOCKET NO.
50-271 DATE 910710 i
COMPLETED BY G.A.
WALLIN TELEPHONE (802)257-7711 REPORT MONTH JUNE
SUMMARY
OF OPERATING EXPERIENCES liighlights Vermont Yankee operated at 81.9% of rated thermal power for the month.
Gross electrical generation was 107.888 MWHe or 79.2% 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 operating at 99.91 of rated thermal power.
910615 At 2224 hours0.0257 days <br />0.618 hours <br />0.00368 weeks <br />8.46232e-4 months <br />, lightning caused a generator full load reject, turbine trip and subsequent reactor scram.
(See Unit Shutdowns and Power Reductions) 910620 At 1415 hours0.0164 days <br />0.393 hours <br />0.00234 weeks <br />5.384075e-4 months <br />, the reactor was critical and a return to full power was initiated.
910621 At 0140 hours0.00162 days <br />0.0389 hours <br />2.314815e-4 weeks <br />5.327e-5 months <br />, the turbine-generator was phased to the grid.
At the end of the reporting period the plant was operating at 23211 of rated thermal power.
VYDPP 0411.04 DP 0411 Rev. 3 Page 1 of 1
.RT No. 13.F01.18X
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