ML19341A045

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Monthly Operating Rept for Dec 1980
ML19341A045
Person / Time
Site: Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date: 01/13/1981
From: Bernard D
VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML19341A044 List:
References
NUDOCS 8101210505
Download: ML19341A045 (11)
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\_. / 1 VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL" REPORT 80-12 FOR THE MONTH OF DECDiBER, 1980 l

l 8101210$

OPERATING DATA REPORT DOCKET NO. 50-271 DATE 810113 COMPLETED BY D. Bernard TELEPHONE 617-872-8100 ext. 2390-OPERATING STAIUS_

l. Unit Name: Vermont Yankee
2. Reporting Period: December
3. Licensed Thermal Power (Wt): 1593
4. Nameplate Rating (Gross We): 540
5. Dasign Electrical Rating (Net We): 514 (one-O 504 (ci ned) '
6. Maximum Dependable capacity (Gross We): 535 ,
7. Maximum Dependable Capacity (Net We): 504
8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7)Since Last Report, Give Reasons:
9. Power Level to Which Restricted,If Any(Nec We):
10. Rsasons For Restrictions, If Any:

This Month Yr--to-Date Cumulative

11. Hours In Reporting Period 744.00 8,784.00 ---
12. Number Of Hours Reactor Was Critical 110.50 6.377.39 57.535.78
13. Rsactor Reserve Shutdown Hours 0.00 0.00 0.00
14. Hours Generator On-Line 73.70 6,273.80 55.601.58
15. Unit Reserve Shutdown Hours 0.00 0.00 0.00
16. Gross Thermal Energy Generated (WR) 30,933.00 9,378,904.00 78,603,517.00
17. Gross' Electrical Energy Generated (W R) 7.171.00 3.143.177.00 26.112.847.00
18. Nst Electrical Energy Generated (WH) 6.406.00 2.979.214.00 24 747 979 nn
19. Unit Service Factor o of 71 e 75_s1
20. Unit Availability Factor 9.91 71.42 76.61
21. Unit Capacity Factor (Using MDC Net) 1.71 67.29 67.65
22. Unit Capacity Factor (Using DER Net) 1.68 65.09 AA u
23. Unit Forced Outage Rate 90.06 13.11 7.31
24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

l 25. If Shut Down At End Of Report Period, Estimated Date of Startup:

L 26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

AVERAGE DAILY UNIT P0kT.R LEVEL l i

4 DOCKET NO. 50-271 UNIT Vermont Yankee l

DATE 810113 -

1 l

CCMPLETD 3Y F.J. Burger 1 1

TELEPHONE 802-257-7711 Ext. 137 l i

MONTE December DAY AVERAGE DAILY POWER LE7EL DAY A7ERAGE DAILY PCWER LEVEL (MWe-Net) (MWe-Net) -

1. 0 17. 0
2. O la, 0
3. 0 19, 0
4. 0 20. 0
5. 0 ,1, 0
6. o 22. n
7. o 23. n
3. o 24. n
9. o 25. n
10. 0 2.. . o

, 11. 0 27. 0

12. 0 28. 15
13. 0 29. 73
14. 0 30. 90
13. 0 31. 89 l

l

16. O INSTRUCTIONS:

Cu :his fornac, list :he average daily uni: pcwer level in MWe-Ne: for each day in

he reporting non:h. Ccmpute to che neares: whole negawatt.

l

UNIT SilUTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTil December COMPl.ETED BY F.J. Burger TELEPilONE 802-257-7711 Ext. 137 Page 1 of 2 E7 ca 'o o y cause & Corrective No. Date y gg g gg License g .n I ""

a' O:0 $ .0 $ $ $3 E~8 Prevent Recurrence gv y g g n: Report # go go E g o S

80-22 801124 F 559.9 A* 4* 80-37/1T CG PIPEXX The pipe cracking is believed to have been (cont) caused by ICSCC. The Sweep-0-Let is under-going a failure analysis to determine the cause of the cracking.

The Sweep-0-Let and piping are being replaced with materials which meet the Intent of Section II of NUREG 0313, Rev. 1, dated October, 1979. -

I r: Forced Reason: Method: Exhibit G- Instructions S: Scheduled A-Equipment Failure (Explain) 'l- Manual for Preparation of l>ata ll-Ma tutenance or Test 2- Manual Scram Entry Sheets for Licensee C-Refueling 3- Automatic Scram Event Report (LER) File D-Regulatory Restriction 4- Other (Explain) (NUREG 0161)

E-Operator Training & License Examination ,.

F-Administrative Exhibit I - Same Source G-Operational Error (Explain)

II-Other (Explain)

, ann

IINIT SilVTDOWNS AND POWER REDUCTIONS DOCKET NO 50-271 UNIT NAME Vermont Yankee REPORT MONTil December DATE 810113 COMPl.ETED BY F.J. Burger TEl.EPil0NE 802-257-7711 Ext. 137 Page 2 of 2 E9 m Y o y Cause & Corrective No. Date 'g ;jg g 7j g License gg .n H =

rt#

a M em m 8 M g U S

80-24 801225 F 106.9 A 4 N/A CF VALVEX Maintained reactor shutdown from previous scram to repair RllR System valve leakage.

80-25 801229 S 2.5 B N/A N/A N/A N/A Turbine Ge.wrator removed from the grid for oversp.ted testing.

I F: Forced Reason: Mettrod: Exhibit G- Instructions S: Scheduled A-Equipment Failure (Explain) 'l- Manual for Preggration of Data B-Haintenance or Test 2- Manual Scram Entry Sheets for Licensee C-Refueling 3- Automatic Scram Event Report (LER) File D-Regulatory Restriction 4- Other (Explain) (NUREG 0161)

E-Operator Training & License Examination 5

F-Administrative F.xhibit I - Same Source G-Operational Error (Explain)

II-Other (Explain)

DOCKET NO. 50-271 UNIT Vermont Yankee DATE 810113 COMPLETED BY F.J. Bureer TELEPHONE 802-257-7711 Ext _ 117 SAFETY RELATED MAINTENANCE Page 1 of 5 NATURE OF MALFUNCTION ER OR OUTACE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION "D" RilR Pump,P-10-ID Corrective N/A Normal Operation Seal Leakage Replaced Seal MR 80-0289 Instrument Isolation Corrective N/A Normal Operation Leakage Repacked Valve Valve V2-12B MR 80-0508 A-D kliR Pumps Corrective N/A NoL'al Operation Leakage Replaced Tubing and Connec-P-10-1A +1D Seal Water MR 80-0804 tions Supply Connections at pump suctions Containment Air Monitor Corrective N/A Shifted Valve Leakage Installed Re-designed Isolation Valve 76 A MR 80-0995 Internals Prevent- Valve Internals Supplied ed Closure by the Factory CRD liydraulic Control Unit Corrective N/A Normal Operation Air Leakage Replaced Solenoids and 14-31 Air Solenoids MR 80-1045 Rebuilt Valves

  1. 3 TIP Machine Containment Corrective N/A Normal Operation Leakage Replaced Seals Penetration MR 80-1051 CRD liydraulic Control Corrective N/A Set Point Drift Out of Calibra- Recalibrated Switch Unit 30-07 Alarm Pressure MR 80-1127 tion Switch RWCU line CUW-18 Corrective LER 80-37/IP 3ee LER Leakage Replaced Affected Compon-MR 80-1133 ents

DOCKET NO. 50-271 UNIT Vermont Yankee DATE 810113 COMPLETED BY F.J. Burger TELEP110NE 802-257-7711 Ext. 137 SAFETY RELATED MAINTENANCE Page 2 of 5 NATURE OF MALFUNCTION ER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION RilR Piping Support Corrective N/A Construction Rejectable NDT llD-200D Removed Indications MR 80-1134 Defects Indication on the Pipe to Saddle Welds llPCI Piping Support 11-31 Corrective N/A ' Normal Operation Loose Turnbuckle Tightened Turnbuckle MR 80-1153 Spring llangers llPCI-3 and Corrective N/A Normal Operation ti-107A, RilR llD-194C and Settings Out of Reset llangers MR 80-1187 Spec.

IID-87C. RR-65 and 66, CSilD-84 R11R Pumps P 10-1A rC Preventive N/A Updated Informa- Need for New Replaced Seals MR 80-1200 tion f rom the Type "0" Ring Factory RilR Minimum Flow Valve Corrective N/A Failed Breaker Valve Inoper- Replaced Breaker V10-16A MR 80-1246 able Shock Suppressor RilR-4 Corrective N/A Jarred During Fluid Leakage Rebuilt Suppressor MR 80-1255 Outage Maintenance Spring liangers RR 29 and Corrective N/A Normal Operation Setting Out of Reset llangers 30, RilR 11D-16 and llD 189 MR 80-1302 Spec.

o DOCKET NO. 50-271 UNIT Vermont Yankee .

DATE 810113 COMPLETED BY F.J. Burger TEI.EP110NE 802-257-7711 Ext.- 137 SAFETY RELATED MAINTENANCE Page 3 of 5 NATURE OF MALFUNCTION ER OR OMGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION "B" RPS !!G Set UV Relay Corrective N/A Worn Parts Did Not Trip Replaced Breaker MR 80-1316 "E" IRM Bypass Switch Corrective N/A Worn Parts Relay Inopera-Relsy Replaced Relay MR 80-1317 , ble Service Water Pumps Corrective N/A Normal Operations Out of Cal.

P7-1A ~ D Discharge 21eaned and Recalibrated MR 80-1347 3 ages.

Pressure Gages Service Water Pump P7-1A Corrective N/A Normal Wear Packing Leak Repacked Pump MR 80-1354 RWCU Valve V12-18 Corrective N/A Normal Wear Bonnet Seal Replaced Seal Ring MR 80-1360 Leakage Shock Suppressor Corrective N/A Normal Operation I.eakage at Sight RR 76 Refilled Reservoir and MR 80-1361 31 ass Tie.htened Fittings Reactor Drain Valve V2-99 Corrective N/A , Normal Operation Packing Leak Repacked Valve MR 80-1380 RilR Valve V10-81A Corrective N/A Normal Operation Packing Leak Adjusted Packing MR 80-1381 RllR Valve V10-46A Corrective N/A Normal Operation llonnet Leakage Replaced Gasket MR 80-1382

DOCKET NO. 3o-271 UNIT Vermont Yankee DATE 810113 COMPLETED BY F.J. Burger TELEP110NE 802-257-7711 Ext. 137 SAFETY RELATED MAINTENANPE Page 4 of 5 NATURE OF MALFUNCTION ER OR OU'I' ACE EQUIPMENT HAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION IIPCI Valve V23-19 Corrective N/A Normal Operation Packing Leak Adjusted Packing MR 80-1383 RCIC Valve V13-22 Corrective N/A Normal Operation Packing Leak

  • Adjusted Packing MR 80-1384 Level Switch LS-6-52B Corrective N/A Normal Operation Tubing Joint Replaced Fittings MR 80-1385 Leak Lsvel Switch LS-2-3-72B Corrective N/A Normal Operation Tubing Joint Tightened Fittings MR 80-1386 Leak RCIC Valve V13-15 Corrective N/A Normal Operation Bonnet Leakage P.eplaced Seal Ring MR 80-1388 RCIC Valve V13-15 Corrective LER 80-43/3L Normal Operation Excessive Seat Lapped Disc and Seat v3 80-1408 Leakage "B" Diesel Pyrometers Corrective N/A Vibration Not Indicating
  1. 4 & #6 Cylinder Resoldered Connections MR 80-1437 RilR Valve V10-27A Corrective Outage 80-24 Normal Operation Excessive Seat Replaced Parts Ad Necessary MR 80-1442 Leakage R11R Valve VJ0-46A Corrective Outage 80-24 Normal Operation Excessive Seat Replaced Parts As Necessary MR 80-1443 Leakage

DOCKET No. 50-271 UNIT Vermont Yankee ,

DATE 810113 COMPLETED BY F.J. Burger TELEPHONE 802-257-7711 Ext. 137 SAFETY RELATED MAINTENANCE Page 5 of 5 NATURE OF MALFUNCTION LER OR OUTAGE EQUIPMENT MAINTENANCE NUMBER CAUSE RESULT CORRECTIVE ACTION RilR Valve V10-81A Corrective Outage 80-24 Failed Packing Leakage Repacked Valve MR 80-1454 9

~.*

DOCKET NO. 50-271 UNIT Vermont Yankee DATE 810113 C0XPLETED BY F.J. Burger TELEPH0:TE 802-257-7711 Ext. 137 December REPORT MONTH SLS ARY OF OPERATING EXPERIENC_ES_

Highlights Vermont Yankee operated at 2.6% of rated thermal power for the month.

Gross electrical generation was 7171 MWH or 1.8% of design electrical capacity.

Ocerating Sanmary The following is a chronological description of plant operations including other pertinent items of interest for the month:

12/1/80 At the beginning of the reporting period the plant was shutdown

[ for the replacement of Reactor Water Cleanup System piping.

12/23/80 At 1910 hrs. a reactor startup was initiated. Criticality was reached at 1950 hrs.

12/24/80 At 0752 hrs. the reactor scrammed due to a combination of a feedwater instrument failure and a malfunction of the turbine generator mechanical pressure regulator.

At 0852 hrs. the shutdown was continued to repair excessive valve seat leakage in the RHR system.

12/27/80 At 2050 hrs. a reactor startup was initiated. Criticality was re :hed at 2128 hrs.

12/28/80 At 1948 hrs. the turbine generator was phased onto the grid.

12/29/80 At 0939 the turbine generator was removed from the grid for overspeed testing. At 1207 the turbine generator was phased onto the grid.

Power was maintained at 23% due to the replacement of additional Reactor Water Cleanup piping.

, 12/31/80 At the end of the reporting cycle the plant was at 23% of rated l thermal power.

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