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Category:MONTHLY OPERATING ANALYSIS REPORT
MONTHYEARBVY-99-127, Monthly Operating Rept for Sept 1999 for Vermont Yankee Nuclear Power Station.With1999-09-30030 September 1999 Monthly Operating Rept for Sept 1999 for Vermont Yankee Nuclear Power Station.With BVY-99-112, Monthly Operating Rept for Aug 1999 for Vermont Yankee.With1999-08-31031 August 1999 Monthly Operating Rept for Aug 1999 for Vermont Yankee.With BVY-99-102, Monthly Operating Rept for July 1999 for Vermont Yankee. with1999-07-31031 July 1999 Monthly Operating Rept for July 1999 for Vermont Yankee. with BVY-99-090, Monthly Operating Rept for June 1999 for Vermont Yankee Nuclear Power Station.With1999-06-30030 June 1999 Monthly Operating Rept for June 1999 for Vermont Yankee Nuclear Power Station.With BVY-99-077, Monthly Operating Rept for May 1999 for Vermont Yankee Nuclear Power Station.With1999-05-31031 May 1999 Monthly Operating Rept for May 1999 for Vermont Yankee Nuclear Power Station.With BVY-99-068, Monthly Operating Rept for Apr 1999 for Vynp.With1999-04-30030 April 1999 Monthly Operating Rept for Apr 1999 for Vynp.With BVY-99-046, Monthly Operating Rept for Mar 1999 for Vermont Yankee Nuclear Power Station.With1999-03-31031 March 1999 Monthly Operating Rept for Mar 1999 for Vermont Yankee Nuclear Power Station.With BVY-99-035, Monthly Operating Rept for Feb 1999 for Vermont Yankee Nuclear Station.With1999-02-28028 February 1999 Monthly Operating Rept for Feb 1999 for Vermont Yankee Nuclear Station.With BVY-99-001, Monthly Operating Rept for Dec 1998 for Vermont Yankee Nuclear Power Station1998-12-31031 December 1998 Monthly Operating Rept for Dec 1998 for Vermont Yankee Nuclear Power Station BVY-98-163, Monthly Operating Rept for Nov 1998 for Vermont Yankee Nuclear Power Station.With1998-11-30030 November 1998 Monthly Operating Rept for Nov 1998 for Vermont Yankee Nuclear Power Station.With BVY-98-154, Monthly Operating Rept for Oct 1998 for Vermont Yankee Nuclear Power Station.With1998-10-31031 October 1998 Monthly Operating Rept for Oct 1998 for Vermont Yankee Nuclear Power Station.With BVY-98-149, Monthly Operating Rept for Sept 1998 for Vermont Yankee Nuclear Power Station.With1998-09-30030 September 1998 Monthly Operating Rept for Sept 1998 for Vermont Yankee Nuclear Power Station.With BVY-98-135, Monthly Operating Rept for Aug 1998 for Vermont Yankee Nuclear Power Station.With1998-08-31031 August 1998 Monthly Operating Rept for Aug 1998 for Vermont Yankee Nuclear Power Station.With BVY-98-122, Monthly Operating Rept for July 1998 for Vermont Yankee Nuclear Power Station1998-07-31031 July 1998 Monthly Operating Rept for July 1998 for Vermont Yankee Nuclear Power Station BVY-98-098, Monthly Operating Rept for June 1998 for Vermont Yankee Nuclear Power Station1998-06-30030 June 1998 Monthly Operating Rept for June 1998 for Vermont Yankee Nuclear Power Station BVY-98-081, Monthly Operating Rept for May 1998 for Vermont Yankee Nuclear Power Station1998-05-31031 May 1998 Monthly Operating Rept for May 1998 for Vermont Yankee Nuclear Power Station BVY-98-068, Monthly Operating Rept for Apr 1998 for Vermont Yankee Nuclear Power Station1998-04-30030 April 1998 Monthly Operating Rept for Apr 1998 for Vermont Yankee Nuclear Power Station BVY-98-053, Monthly Statistical Rept for Mar 1998 for Vynp1998-03-31031 March 1998 Monthly Statistical Rept for Mar 1998 for Vynp ML20248L1581998-02-28028 February 1998 Monthly Operating Rept for Feb 1998 for Vermont Yankee Nuclear Power Station ML20217M7801998-01-31031 January 1998 Monthly Operating Rept for Jan 1998 for Vynp Station ML20198L6111997-12-31031 December 1997 Monthly Operating Rept for Dec 1997 for Vynp Station BVY-97-161, Monthly Operating Rept for Nov 1997 for Vermont Yankee Nuclear Power Station1997-11-30030 November 1997 Monthly Operating Rept for Nov 1997 for Vermont Yankee Nuclear Power Station BVY-97-145, Monthly Operating Rept for Oct 1997 for Vermont Yankee Nuclear Power Station1997-10-31031 October 1997 Monthly Operating Rept for Oct 1997 for Vermont Yankee Nuclear Power Station BVY-97-126, Monthly Operating Rept for Sept 1997 for Vermont Yankee Nuclear Power Station1997-09-30030 September 1997 Monthly Operating Rept for Sept 1997 for Vermont Yankee Nuclear Power Station BVY-97-111, Monthly Operating Rept for Aug 1997 for Vermont Yankee Nuclear Power Station1997-08-31031 August 1997 Monthly Operating Rept for Aug 1997 for Vermont Yankee Nuclear Power Station BVY-97-098, Monthly Operating Rept for Jul 1997 for Vermont Yankee Nuclear Power Station1997-07-31031 July 1997 Monthly Operating Rept for Jul 1997 for Vermont Yankee Nuclear Power Station BVY-97-088, Monthly Operating Rept for June 1997 for Nynps1997-06-30030 June 1997 Monthly Operating Rept for June 1997 for Nynps BVY-97-074, Monthly Operating Rept for May 1997 for Vermont Yankee Nuclear Power Station1997-05-31031 May 1997 Monthly Operating Rept for May 1997 for Vermont Yankee Nuclear Power Station BVY-97-059, Monthly Operating Rept for Apr 1997 for Vermont Yankee Nuclear Station1997-04-30030 April 1997 Monthly Operating Rept for Apr 1997 for Vermont Yankee Nuclear Station BVY-97-042, Monthly Operating Rept for Mar 1997 for Vermont Yankee Nuclear Power Station1997-03-31031 March 1997 Monthly Operating Rept for Mar 1997 for Vermont Yankee Nuclear Power Station BVY-97-033, Monthly Operating Rept for Feb 1997 for Vermont Yankee Power Station1997-02-28028 February 1997 Monthly Operating Rept for Feb 1997 for Vermont Yankee Power Station BVY-97-021, Monthly Operating Rept for Jan 1997 for VYNPS1997-01-31031 January 1997 Monthly Operating Rept for Jan 1997 for VYNPS BVY-97-001, Monthly Operating Rept for Dec 1996 for Vermont Yankee Nuclear Power Station1996-12-31031 December 1996 Monthly Operating Rept for Dec 1996 for Vermont Yankee Nuclear Power Station BVY-96-154, Monthly Operating Rept for Nov 1996 for Vermont Yankee Nuclear Power Station1996-11-30030 November 1996 Monthly Operating Rept for Nov 1996 for Vermont Yankee Nuclear Power Station BVY-96-138, Monthly Operating Rept for Oct 1996 for Vermont Yankee Nuclear Power Station1996-10-31031 October 1996 Monthly Operating Rept for Oct 1996 for Vermont Yankee Nuclear Power Station BVY-96-114, Monthly Operating Rept for Sept 1996 for Vynp1996-09-30030 September 1996 Monthly Operating Rept for Sept 1996 for Vynp BVY-96-103, Monthly Operating Rept for Aug 1996 for Vermont Yankee Nuclear Power Station1996-08-31031 August 1996 Monthly Operating Rept for Aug 1996 for Vermont Yankee Nuclear Power Station BVY-96-095, Monthly Operating Rept for July 1996 for VT Yankee Nuclear Power Station1996-07-31031 July 1996 Monthly Operating Rept for July 1996 for VT Yankee Nuclear Power Station BVY-96-087, Monthly Operating Rept for June 1996 for Vermont Yankee Nuclear Power Station1996-06-30030 June 1996 Monthly Operating Rept for June 1996 for Vermont Yankee Nuclear Power Station BVY-96-072, Monthly Operating Rept for May 1996 for Vermont Yankee Nuclear Power Station1996-05-31031 May 1996 Monthly Operating Rept for May 1996 for Vermont Yankee Nuclear Power Station BVY-96-057, Monthly Operating Rept for Apr 1996 for VT Yankee Power Station1996-04-30030 April 1996 Monthly Operating Rept for Apr 1996 for VT Yankee Power Station BVY-96-041, Monthly Operating Rept for Mar 1996 for Vynp1996-03-31031 March 1996 Monthly Operating Rept for Mar 1996 for Vynp BVY-96-018, Monthly Statistical Rept for Feb 1996 for VT Yankee Nuclear Power Station1996-02-29029 February 1996 Monthly Statistical Rept for Feb 1996 for VT Yankee Nuclear Power Station BVY-96-009, Monthly Operating Rept for Jan 1996 for Vermont Yankee Nuclear Power Station1996-01-31031 January 1996 Monthly Operating Rept for Jan 1996 for Vermont Yankee Nuclear Power Station BVY-96-001, Monthly Operating Rept for Dec 1995 for Vermont Yankee Nuclear Power Station1995-12-31031 December 1995 Monthly Operating Rept for Dec 1995 for Vermont Yankee Nuclear Power Station ML20095F6601995-11-30030 November 1995 Last Page of Monthly Operating Rept for Nov 1995 for Vermont Yankee BVY-95-131, Monthly Operating Rept for Nov 1995 for Vermont Yankee Nuclear Power Station1995-11-30030 November 1995 Monthly Operating Rept for Nov 1995 for Vermont Yankee Nuclear Power Station BVY-95-118, Monthly Operating Rept for Oct 1995 for Vynp1995-10-31031 October 1995 Monthly Operating Rept for Oct 1995 for Vynp BVY-95-106, Monthly Operating Rept for Sept 1995 for Vynp1995-09-30030 September 1995 Monthly Operating Rept for Sept 1995 for Vynp ML20092F5901995-08-31031 August 1995 Monthly Operating Rept for Aug 1995 for Vermont Yankee Nuclear Station 1999-09-30
[Table view] Category:TEXT-SAFETY REPORT
MONTHYEARML20217L8831999-10-21021 October 1999 Safety Evaluation Supporting Proposed Alternatives to Code Requirements Described in RR-V17 & RR-V18 ML20217G2041999-10-13013 October 1999 Safety Evaluation Supporting Amend 179 to License DPR-28 BVY-99-127, Monthly Operating Rept for Sept 1999 for Vermont Yankee Nuclear Power Station.With1999-09-30030 September 1999 Monthly Operating Rept for Sept 1999 for Vermont Yankee Nuclear Power Station.With ML20212C2551999-09-17017 September 1999 Safety Evaluation Supporting Amend 175 to License DPR-28 BVY-99-112, Monthly Operating Rept for Aug 1999 for Vermont Yankee.With1999-08-31031 August 1999 Monthly Operating Rept for Aug 1999 for Vermont Yankee.With BVY-99-109, Ro:On 990812,stack Ng Effluent Instrumentation for PAM Was Declared Oos.Caused by Instrument Drift Due to Electronic Components Based on Insps by Instrumentation & Controls Dept.Detector & Preamplifier Will Be Replaced on 9908311999-08-19019 August 1999 Ro:On 990812,stack Ng Effluent Instrumentation for PAM Was Declared Oos.Caused by Instrument Drift Due to Electronic Components Based on Insps by Instrumentation & Controls Dept.Detector & Preamplifier Will Be Replaced on 990831 BVY-99-102, Monthly Operating Rept for July 1999 for Vermont Yankee. with1999-07-31031 July 1999 Monthly Operating Rept for July 1999 for Vermont Yankee. with ML20209J0081999-07-14014 July 1999 Special Rept:On 990615,diesel Driven Fire Pump Failed to Achieve Rated Flow of 2500 Gallons Per Minute.Pump Was Inoperable for Greater than 7 Days.Corrective Maint Was Performed to Reset Pump Lift Setting BVY-99-090, Monthly Operating Rept for June 1999 for Vermont Yankee Nuclear Power Station.With1999-06-30030 June 1999 Monthly Operating Rept for June 1999 for Vermont Yankee Nuclear Power Station.With ML20196G5071999-06-23023 June 1999 Vynp Assessment of On-Site Disposal of Contaminated Soil by Land Spreading BVY-99-077, Monthly Operating Rept for May 1999 for Vermont Yankee Nuclear Power Station.With1999-05-31031 May 1999 Monthly Operating Rept for May 1999 for Vermont Yankee Nuclear Power Station.With BVY-99-068, Monthly Operating Rept for Apr 1999 for Vynp.With1999-04-30030 April 1999 Monthly Operating Rept for Apr 1999 for Vynp.With ML20206E8741999-04-29029 April 1999 SER Determined That Flaw Evaluation Meets Rules of ASME Code & Assumed Crack Growth Rate Adequate for Application ML20206D9301999-04-27027 April 1999 1999 Emergency Preparedness Exercise 990427 Exercise Manual (Plume Portion) ML20205S4211999-04-16016 April 1999 Non-proprietary Version of Revised Page 4-3 of HI-981932 Technical Rept for Vermont Yankee Spent Fuel Pool Storage Expansion ML20205K7581999-04-0707 April 1999 Safety Evaluation Supporting Alternative Proposal for Reexamination of Circumferential Welds with Detected Flaw Indications in Plant RPV BVY-99-046, Monthly Operating Rept for Mar 1999 for Vermont Yankee Nuclear Power Station.With1999-03-31031 March 1999 Monthly Operating Rept for Mar 1999 for Vermont Yankee Nuclear Power Station.With ML20205F6631999-03-0404 March 1999 Jet Pump Riser Weld Leakage Evaluation BVY-99-035, Monthly Operating Rept for Feb 1999 for Vermont Yankee Nuclear Station.With1999-02-28028 February 1999 Monthly Operating Rept for Feb 1999 for Vermont Yankee Nuclear Station.With ML20205P8241999-02-28028 February 1999 Rev 2 to Vermont Yankee Cycle 20 Colr ML20203H9881999-02-18018 February 1999 SER Accepting Alternative to 10CFR50.55a(g)(6)(ii)(A) Augmented Reactor Vessel Exam at Vermont Yankee Nuclear Power Station.Technical Ltr Rept Encl ML20203A6951999-02-0404 February 1999 Revised Rev 2,App B to Vermont Yankee Operational QA Manual (Voqam) ML20199K7151999-01-21021 January 1999 Corrected Safety Evaluation Supporting Amend 163 Issued to FOL DPR-28.Pages 2 & 3 Required Correction & Clarification ML20199K6991999-01-20020 January 1999 Safety Evaluation Concluding That Request to Use YAEC-1339, Yankee Atomic Electric Co Application of FIBWR2 Core Hydraulics Code to BWR Reload Analysis, at Vermont Yankee Acceptable ML20199L5951999-01-14014 January 1999 Safety Evaluation Accepting Licensee Proposed Alternative to Code Requirement,Described in Rev 2 to Pump Relief Request RR-P10 Pursuant to 10CFR50.55a(a)(3)(i) BVY-99-071, Corp 1998 Annual Rept. with1998-12-31031 December 1998 Corp 1998 Annual Rept. with BVY-99-001, Monthly Operating Rept for Dec 1998 for Vermont Yankee Nuclear Power Station1998-12-31031 December 1998 Monthly Operating Rept for Dec 1998 for Vermont Yankee Nuclear Power Station ML20198H5481998-12-23023 December 1998 Rev 2 to Vermont Operational QA Manual,Voqam ML20196H8641998-12-0101 December 1998 Cycle 19 Operating Rept BVY-98-163, Monthly Operating Rept for Nov 1998 for Vermont Yankee Nuclear Power Station.With1998-11-30030 November 1998 Monthly Operating Rept for Nov 1998 for Vermont Yankee Nuclear Power Station.With ML20195C4161998-11-0909 November 1998 SER Accepting Request That NRC Approve ASME Code Case N-560, Alternative Exam Requirement for Class 1,Category B-J Piping Welds BVY-98-154, Monthly Operating Rept for Oct 1998 for Vermont Yankee Nuclear Power Station.With1998-10-31031 October 1998 Monthly Operating Rept for Oct 1998 for Vermont Yankee Nuclear Power Station.With ML20155B6471998-10-26026 October 1998 Safety Evaluation Accepting Jet Pump Riser Insp Results & Flaw Evaluation,Conducted During 1998 Refueling Outage ML20154N0891998-10-16016 October 1998 Rev 1 to Vermont Operational QA Program Manual (Voqam) ML20154B6951998-10-0101 October 1998 SER Re Licensee Response to GL 95-07, Pressure Locking & Thermal Binding of Safety-Related Power-Operated Gate Valves, for Vermont Yankee Nuclear Power Station BVY-98-149, Monthly Operating Rept for Sept 1998 for Vermont Yankee Nuclear Power Station.With1998-09-30030 September 1998 Monthly Operating Rept for Sept 1998 for Vermont Yankee Nuclear Power Station.With ML20239A1361998-09-0202 September 1998 SER Re License Request for NRC Review & Concurrence W/Changes to NRC-approved Fire Protection Program BVY-98-135, Monthly Operating Rept for Aug 1998 for Vermont Yankee Nuclear Power Station.With1998-08-31031 August 1998 Monthly Operating Rept for Aug 1998 for Vermont Yankee Nuclear Power Station.With ML20151U0361998-08-28028 August 1998 Non-proprietary Rev 1 to Holtec Rept HI-981932, Vermont Yankee Nuclear Power Station Spent Storage Expansion Project ML20237E9221998-08-20020 August 1998 Vynp 1998 Form NIS-1 Owners Summary Rept for ISI, 961103-980603 BVY-98-122, Monthly Operating Rept for July 1998 for Vermont Yankee Nuclear Power Station1998-07-31031 July 1998 Monthly Operating Rept for July 1998 for Vermont Yankee Nuclear Power Station ML20205F6491998-07-31031 July 1998 Rev 1 to GE-NE-B13-01935-02, Jet Pump Assembly Welds Flaw Evaluation Handbook for Vermont Yankee ML20236G0011998-06-30030 June 1998 Individual Plant Exam External Events BVY-98-098, Monthly Operating Rept for June 1998 for Vermont Yankee Nuclear Power Station1998-06-30030 June 1998 Monthly Operating Rept for June 1998 for Vermont Yankee Nuclear Power Station ML20248C5081998-05-31031 May 1998 Rev 2 to 24A5416, Supplemental Reload Licensing Rept for Vermont Yankee Nuclear Power Station Reload 19 Cycle 20 ML20248C4951998-05-31031 May 1998 Rev 1 to Vermont Yankee Nuclear Power Station Cycle 20 Colr BVY-98-081, Monthly Operating Rept for May 1998 for Vermont Yankee Nuclear Power Station1998-05-31031 May 1998 Monthly Operating Rept for May 1998 for Vermont Yankee Nuclear Power Station ML20247J8341998-05-31031 May 1998 Peak Suppression Pool Temp Analyses for Large Break LOCA Scenarios, for May 1998 ML20247G4001998-05-12012 May 1998 Interview Rept of Ej Massey ML20247E6351998-04-30030 April 1998 Rev 1 to GE-NE-B13-01935-LTR, Jet Pump Riser Welds Allowable Flaw Sizes Ltr Rept for Vermont Yankee 1999-09-30
[Table view] |
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{{#Wiki_filter:- n. . . . . . . - . . - . . - . . . . . - . . . . .- - - . - . . . - . . - _ - - . - . . . .
VbR$10NT YANKEE l NOCLEAR POWER CORPORATION
._. i e
~ P.O. Box 157, Governor Hunt Road I N
y
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Vernon, Vermont 05354-0157 (802) 257 7711 (qhR ~ )/ -
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.
w WarrenP[Murph $f Senior Vice Prefr de t, Operations cc: 1-) USNRC i
Region I i
475 Allendale Road King of Prussia, PA 19406
- 2) USNRC Resident Inspector, VYNPS DP 0411 Rev. 3 Page 1 of 1 I
l.-
91v4120348 910331 ADOCK0500'g"{1 g
{La
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
- 22. 72.91 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
- 26. N/A 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 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.
91-03 910313 F 103.95 A 3 91-05 EA CKTBBK Reactor scrammed due to a switchyard ground and resultant generator full load reject.
91-04 910317 F 7.75 A 1 N/A CF VALVEX Excess 17e drywell leakage rate caused by RHR-46A valve Yalve bonnet was tightened.
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)
E-Operator Training and License Examination F-Administrative 5 Exhibit I - Same Source vYDPF 0411.03 G-Operational Error (Explain)
DP 0411 Rev. 3 H-{ Explain) - Rod pattern exchange Page 1 of 1 l
i a
4 e
. , 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}}