ML20077A712
| ML20077A712 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 04/30/1991 |
| From: | Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| VYV-91-120, NUDOCS 9105100355 | |
| Download: ML20077A712 (6) | |
Text
._._
i V dthiONT YANKEE NUCLEAR POWER CORPORATION
~f,
\\-
P.O. Box 157, Governor Hunt Road
- (
Vernon. Vermont 05354-0157 (802) 257 7711 qn
~...
May 10, 1991 VYV 91-120
)
I l
U.S. Nuclear Regulatory Commission ATTN Document control Desk i-Washington, D.C.
20555 D' ear Sir t
l Submitted herewith is the Monthly Statistical Report for the Vermont Yankee Nuclear Power Station for the month of April, 1991.
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORP.
[ tt< -
M#
Warren P Mur y
Senior V ce Pres e
, Operations
,cc:
- 1) USNRC Region I l
475 Allendale Road King of Prussia, PA 19406.
-DP 0411 Rev. 3
- Page 1 of 1 l
'9105100355 910430 l.
PDR' ADOCK 05000271 R.
[M%
'/L_j
4 i
i l
VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 91-04 FOR THE MONTH OF APRIL, 1991 DP 0411 Rev. 3 Page 1 of 1
=
i-OPERATING DATA REPORT DOCKET NO.
50-271 DATE 910510 COMPLETED BY G.A.
WALLIN TELEPHONE 18021257-7711 OPERATING STATUS 1.
Unit-Names Vermont Yankee j
3.-Reporting Period:
April NOTES:
- 3. Licensod Thermal Power (MWt):1593 4.LNameplate Rating (Gross MWe):
512
- 5. Design-Electrical Rating (Net MWe):
514(oc)'504(cc) 6.-Maximum Dependable Capacity (Gross MWe):
115
'7. Maximum-Dependable' Capacity (Net MWe):
121 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 i
11 '. Hours in Reporting Period 719.00 2879.00 161399.00
- 12. Number Of. Hours Reactor was Critical 562.80 2638.70 130827.33
- 13. Reactor Reserve Shutdown Hours 0.00 0.00 0.00
- 14. Hours Generator On-Line:
550.95_
2599.25 127970.85 15.-Unit Reserve Shutdown. Hours.
0.00 0.00 0.00 16.' Gross'ThermalLEnergy Generated (MWH) 867786.50 4090168.00 189405471xQQ i
17.= Gross Electrical Energy-Generated 291614.00 1377923.00 631?5418.00 i
1
- 18. _ Net Electrical: Energy Generated (MWH) 279186.00 1221494.00 59953464.00 19.-Unit Service Factor 76.63 90.28 78.46 130. Unit Availability 1 Factor 76.63 90.28 78.46 131. Unit = Capacity Factor (Uning MDC Net)1 77.04 91.07 72.93
- 33. UnitLCapacity Factor (Using DER Net) 75.54 89.30 71.51 33.' Unit Forced: Outage Rate 23.37 9.72 5.61 h
- 34. Shutdowns scheduled:over.next 6 months (Type, Date, and Duration of Eacht-N/A-
-25. If-shut down at end of. report period, estimated date of-startup: N/A.
13 6. Units'In Test. Status (prior to commercial operation): N/A Forecast Achieved i
. INITIAL CRITICALITY-INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 DP;0411 Rev. 3
.Page 1 of 1-
.RT-No. 13.F01.19F
,.i+.._w
...1u.-,----,.
.o..
....... -m
~... i....-~
..-.m
.,,--.-....~~..-..,..,-,---4.....
.. J. - r v
AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.
50-271 UNIT Vermont Yankgg DATE 910510 COMPLETED BY G.A. WALLIN TELEPHONE f802)257-7711 MONTH April DAY AVERAGE DAILY-POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)
(MWe-Net) 1.
514 17.
516 2.
514 18.
516 3.
511 19, 515 4.
508 20.
515 5.
509 21.
515 6.
509 22.
516 7.*
487 23.
318 8.
510 24.
0 9.
514 25.
0 10.
515 26.
0 11.
514 27.
0 12.
515 28.
0 13, 516 29.
O 14.
515 30.
39 i
i l
15.
516 31.
16.
516
- -23 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.
VYDPF 0411.02 DP 0411 Rev. 3 Page 1 of 1 RT No. 13.F01.18V l'
~
UNIT. SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH APRIL DOCKET NO 50-271 UNIT NAME Vermont Yankee DATE 910510 COMPLETED BY G.A.
Wallin TELEPHONE (802)257-7711 1
2 3
No.
Date Type Duration Reason Method of License System Component Cause and Corrective (hours)
Shutting Event Code Code Action to Prevent a
Down Report #
4 5
Recurrence Reactor 91-05 910423 F_
168.05 B
3 91-09 ED XXXXXX Turbine trip / reactor scram due to a generator full load reject caused by switchyard battery maintenance l'
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 Licensc C-Refueling 3 - Automatic Scram Event Report (LER) File D-Regulatory Restriction 4 - Other (Explain)
E-Operator Training and License Examination 5 Exhibit I - Same Source VYDPF 0411.03 F-Administrative I
DP 0411 Rev. 3 G-Operational Error (Explain)
- Page 1 of 1 H-(Explain) j 4
l
DOCKET No.
50-271 DATE 910510 COMPLETED BY G.A.
WALLIN TELEPHONE (802)257-7711 REPORT MONTH APRIL EEM_ MARY OF OPERATING EXPERIENCES Hiahlichts Vermont Yankee operated at.75.8% of rated thermal power for the month.
Gross electrical generation was 291.614 MWHe or 75.1% design electrical capacity.
gperatina Summary The following is a chronological description of plant operations including other portinent items of interest for the month:
At the beginning of the reporting period the plant was operating at 99.9%
of rated thermal power.
910423 At 1448 hours0.0168 days <br />0.402 hours <br />0.00239 weeks <br />5.50964e-4 months <br />, switchyard battery maintenance resulted in a generator full load reject, turbine trip and subsequent reactor scram. (See Unit Shutdowns and Power Reductions) 910430 At 0300 hours0.00347 days <br />0.0833 hours <br />4.960317e-4 weeks <br />1.1415e-4 months <br />, the reactor was critical and a return to full power was initiated.
910430 At 1451 hours0.0168 days <br />0.403 hours <br />0.0024 weeks <br />5.521055e-4 months <br />, the turbine-generator was phased to the grid.
At the end of the reporting period the plant was operating at liull of rated thermal power.
VYDPF 0411.04 DP 0411 Rev. 3 Page 1 of 1 RT No. 13.F01.18X
..