ML20070W083
| ML20070W083 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/31/1991 |
| From: | Murphy W, Wallin G VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| VYV-91-095, VYV-91-95, NUDOCS 9104120348 | |
| Download: ML20070W083 (6) | |
Text
{{#Wiki_filter:- n. VbR$10NT YANKEE NOCLEAR POWER CORPORATION i P.O. Box 157, Governor Hunt Road ~ y )4 b e Vernon, Vermont 05354-0157 (qhR ~ )/ (802) 257 7711 z) N April 10, 1991 VYV 91-095 U.S. Nuclear Regulatory Commission ATTN Document Control Desk Washington, D.C. 20555
Dear Sir:
Submitted herewith is the Monthly Statistical Report for the Vermont Yan)ee Nuclear Power Station for the month of March, 1991.. Very-truly yours, . VERMONT YANKEE NUCLEAR POWER CORP. $f w WarrenP[Murph Senior Vice Prefr de t, Operations cc: 1-) USNRC i Region I 475 Allendale Road i King of Prussia, PA 19406
- 2) USNRC Resident Inspector, VYNPS DP 0411 Rev. 3 Page 1 of 1 I
l.- 91v4120348 910331 {La ADOCK0500'g"{1 g
VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL RE'vRT 91-03 FOR THE MONTH OF MARCH, 1991 DP 0411 Rev. 3 Page 1 of 1 l (
OPERATING DATA REPORT-DOCKET NO.- 50-271 DATE 010410 -COMPLETED BY u.A. Wallin__. TELEPHONE (802)257-7711 OPERATING STATUS l 1. Unit Name Vermont Yankee NOTES: 2. Reporting Period March 3. Licensed-Thermal Power (MWt): 1593 4. Nameplate 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: 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 744.00 2160.00 160680.00
- 12. -Number Of Hours Reactor was Critical 659.90 2075.90 130264.53 13.
Reactor. Reserve Shutdown Hours QuqQ 0.06 -0.00 14. Hours Generator On-Line 632.30 -2048.30 127419.90: 15. Unit Reserve Shutdown-Hours-0.00 0.00~ 0.65 16. Gross Thermal Energy Generated (MWH) 993650.00 3222381.50 188537686.5Q 17. Gross Electrical Energy Generated 334039.00 1086309.00 62833804.00 18. Net-Electrical Energy Generated (MWH)320444.00 1042308.00-59674278.00 19. Unit Service Factor 84,99 94.83 78.47 20. Unit Availability Factor 84.99 94.83 78.47 21. Unit Capacity Factor (Using MDC Net) 85.46 95.74 72.91 22. Unit Capacity Factor (Using DER Net) _ 83.79 93.88-71.50 23. Unit Forced Outage Rate 15.01 %.17 - 5.51 24. Shutdowns scheduled over next 6 months (Type,: Date, and Duration of Each): N/A 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 INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION VYDPF 0411.01 ~~ DP 0411 Rev. 3 Page 1 of 1 RT No. 13.F01.19F
.. - - -.. -...... -... - -.. -. _ -.... _.... ~.. AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee-- DATE 9T6410 COMPLETED BY G. A.' Wallin TELEPHONE ~(802)257-7711-MONTH March DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1. 517 17. 0-2. 516 18, 85 ~~~ 3. 515 19. 484 4. 516 20, 514 5. 516 21, 515 6.- 515 2 2.- 515 7. 515 23. 515 8. 515 24. 515 "~ 9. 515 25. 515 10. 514 26, 515 11. 513 '27.- 516 12. 464-2 8.- 514-13. 478 29.: 514 -14. 0 30. 514 15. 0 31. 514 16. O ~ 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. VYDPr 0411.02 DP 0411 Rev. 3 -Page 1 of 1 RT No. 13.E01.18V
UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET N0 50-271 REPORT MODTH MARCH UNIT NAME ve_rmont Yankee DATE 910410 COMPLETED By G.A. Wallin TELEPHONE 48S2)257-7711 l 1 l 1 2 Method of License System Component Cause and Corrective No. Date Type Duration Reason Shutting Down Event Code Code Action to (hours) Reactor 3 Reporte 4 5 Prevent Recurrence i 91-02 910312 S 0.00 B,H N/A N/A RB CONROD Turbine bypass valve testing, rod pattern exchange and scheduled maintenance. I i 91-03 910313 F 103.95 A 3 91-05 EA CKTBBK Reactor scrammed due to a switchyard ground and resultant I generator full load reject. 91-04 910317 F 7.75 A 1 N/A CF VALVEX Excess 17e drywell leakage rate 7 caused by RHR-46A valve Yalve bonnet was tightened. l 1 F: Forced 2 Reasons 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 Licensee C-Refuelt g 3-Automatic Scras Event Report (LER) File [ D-Regulatory Restriction 4-Other (Explata) (NUREG 0161) l E-Operator Training and License Examination 1 F-Administrative 5 Exhibit I - Same Source f vYDPF 0411.03 G-Operational Error (Explain) { DP 0411 Rev. 3 H-{ Explain) - Rod pattern exchange I Page 1 of 1 l i a 1 4 e 2
DOCKET NO. 10-271 UNIT Vermont Yenkon DATE 910410 COMPLETED BY G.A. Wallin TELEPHONE (802)257-7711 REPORT MONTH March
SUMMARY
OF OPERATING EXPERIENCES Highlights d Vermont Yankee operated at 83.8% of rated thermal power for the month. Gross electrical generation was 334,039 MWHe or 83.1% 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 99.9% of rated thermal power. 910312 At 0715 hours, initiated a power reduction to 70% to perform turbine bypass valve testing, a rod pattern exchange and scheduled maintenance on the 381 transmission line. 910312 At 0950 hours, at 70% power initiated turbine bypass valve testing. (See Unit Shutdowns and Power Reductions) 910312 At 1005-hours, completed turbine bypass valve testing and initiated a rod pattern exchange. (See Unit Shutdowns and Power Reductions) 910312 At 1224 hours, completed the rod pattern exchange. Remaining at 79% power until maintenance of the 381 transmission line is concluded. 910312 At 1454 hours, completed 381 transmission line maintenance and began a return to full power. 910313 At 2228 hours, the reactor scrammed due to a switchyard ground and resultant generator full load reject._ (See Unit Shutdowns and Power Reductions) 910317 At 0249 hours, the reactor was critical. 910317 At 1710 hours, the reactor was sub-critical to repair a leak on the RHR-46A valve. (See Unit Shutdowns and Power Reductions) 910318 At 0055 hours, following valve repairs the reactor was critical and a return , full power was initiated. 910318 At 1410 hours, the turbine-generator was phased to the grid. At the end of the reporting period the plant was operating at 99.8% of rated thermal power. VYDPF 0411.04 DP 0411 Rev. 3 Page 1 of 1 RT No. 13.rO1.18X}}