ML20064E079

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Monthly Oper Rept for Oct 1978
ML20064E079
Person / Time
Site: Vermont Yankee Entergy icon.png
Issue date: 11/10/1978
From: Sjogren R
VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML20064E077 List:
References
NUDOCS 7811140127
Download: ML20064E079 (8)
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VER.\10NT YANKEE NUCLEAR POWER STATION F10NT11LY STATISTICAL REPORT 78-10 FOR THE F10NTil 0F OCTOBER,1978 50- L1 t - R

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[ OPERATING DATA REPORT l

50-271 DOCKET NO.

DATE -761110 CO31PLETED BY R.M. Siogren TELEPHONE A17 166 9011 X2281:

OPERATING STATUS

1. Uni Name: Vermont Yankee yyNchangeduringmonthof
2. Reporting Period: October 1978 October.

1593

3. Licensed Thermal Power (31Wt):
4. Nameplate Rating (Gross 31We):

540

5. Design Electrical Rating (Net 31We):

514 (open cycle) 504 I closed)

D3#

6. Staximum Dependable Capacity (Grcss 31We):

504

7. Staximum Dependable Capacity (Net 31We).
8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report.Gise Reasons:
9. Power Level To Which Restricted.lf Any (Net 31We): N ne
10. Reasons For Restrictions,if Any: N/A This Stonth Yr to.Date Cumulative .
11. Hours in Reporting Period 745 7,296 53.570.75
12. Number Of flours Reactor was Critical 298.92 5,405.17 42,441.03 0 0 o
13. Reactor Resene Shutdown Hours
14. Hours Generator On.Line 199 5,217 .

40;665 0 0 0 t.

15. Unit Resene Shutdown Hours 234,304.5 7,847,385 56,188,528
16. Gross Thermal Energy Cenerated (31WH) ,
17. Gross Electrical Energy Generated (SIWH) 74,382 2,644,596 _18,589,306 70,823 2,520,328 17,599,161
18. Net Electrical Energy Generated (31WH) *
19. Unit Senice Factor 26.7 71.5 75.9 Zb./ 71.5 ed.9 .
20. Unit Availability Factor
21. Unit Capacity Factor (Using SIDC Net)

M.9 68.5 65.2 Mb 07 2 63.9

22. Unit Capacity Factor (Using DER Net)
23. Unit Forced Outage Rate 54.9 21.0 7.5
24. Shutdowns Scheduled Oser Next 6 Stonths(Type.Date.and Duration uf Each):
25. If Shut Down At End Of Report Period. Estimated Date of Startup:
26. Units In Test Status (Prior to Commercial Operation): Forecast Achiesed

.- INITIA L CRITICA LITY INITIA L ELECTRICITY CONI.\1ERCIAL OPER ATION (9/77)

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i AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-271 UNIT Vermont Yankee 781110 DATE COMPLETED BY R.Fl. Sjogren TELEP110NE 617-366-9011 X2281 A!ONTH October 1978 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (Mhe Net) (MWe Net) 0 375 1 37 12 2 18 3

278 39 4 l 20 381 466 5 23 i

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2: 510 i-( 7 23 4

l 8 0 24 l

i 9 35 10 26 f

Il 27

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28 11 l 13 29 14 197 30 5

15 3t V 16 364 INSTRUCTIONS On this format. list the aserage daily unit power levelin MWe Net for each day in the reportine -

month. Compute to the nearest whole rnegawstt.

(9/77)

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_ _ _ ________________- _ _ _ _ _ _ _ _ _ .1

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II DOCKET NO. 50-271 UNIT SilUTDOWNS AND POWER REDUCTIONS UNIT N AME Vemont Yankee DATE 78111o COMPLETED ilY -R.M. Sincren REPORT MON'ill October 1978 TELLPilONE 617-366 'J011 X2281-e.

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.5 E };; j s'E Licensee E t, ., Cause & Currective No. Date g 3g jg5 Event g? [*1 9

gu Action to l

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$2 5 3 e-if3 Report

  • in u U

Prevent Recurrence l

Q 78-17 731001 S 303 C 1 NA RCA FUELXX NA l

78-18 781018 F 26 ll 3 NA CBA PUMPXX B - Reactor Recirculation Pump overspeed 78-19 781023 F 216 11 2 NA NA NA B - Turbine bearing problems l

l 2 3 4 F: Forced Reason: Method: E xhibit G - Instructisms S: St heduleil A. Equipment Failure (Explain) 1 Manual for Preparation of Data H. Maintenance of Test 2-Manual Scram. Entry Sheets for Licensee C. Refueling 3-Automatic Scram. Event Repor (LERI File INtlREG-D-Regulatory Restriction 4-O:her (Explain) 0161)

1. Operator Training & License Examination F Administrative 5 G-Operational Le ror (Explain) E xhibis 1 - Same Source C1/77) 11 Other (E xplain)

> . . m DOCKET NO. 50-271 UNIT Vermont Yankee DATE 781110 COMPLETED BY R.M. Sjogren TELEPHONE 617-366-9011 X2281' REPORT MONTH October 1978 SU:CIARY OF OPERATING EXFERIENCES Highlights Vermont Yankee operated for 11 of 31 days in the report period. For the entire month of October, the plant operated at an average of 19.8%

of rated thermal power. Gross electrical generation for the month was 74,382 MWHe or 18.5*. of design electrical capacity.

Operation Summary The following is a chronological description of plant operations in-cluding other pertinent items of interest for the month:

10-1 At the beginning of this report period, the plant was in the shutdown mode for refueling.

~

10-12 At 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br />, a return to full power was initiated ending the September-October refueling outage.

10-18 At 0200 hours0.00231 days <br />0.0556 hours <br />3.306878e-4 weeks <br />7.61e-5 months <br />, having achieved 84% of rated thermal capacity, a reactor scram occurred. This scram was due to a reactor recirculation punp overspeed. A return to full power was initiated at 1000 hours0.0116 days <br />0.278 hours <br />0.00165 weeks <br />3.805e-4 months <br />.

10-23 At 0500 hours0.00579 days <br />0.139 hours <br />8.267196e-4 weeks <br />1.9025e-4 months <br />, while at 99% power, the reactor was manu-ally shut down iue to turbine bearing problems.

10-30 At 1700 hours0.0197 days <br />0.472 hours <br />0.00281 weeks <br />6.4685e-4 months <br />, . return to full power was initiated.

10-31 At the conclusion of this report period, the reactor was operating at 55 of rated thermal power and increasing in preparation for plant startup.

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- - - - - - - - - - ---- - - - - - - - - -- - - - - _ -J

DOCKET NO. 50-271 .

UNIT Vermont Yankee -

l DATE 781110 ,

i C0f!PLETED BY R.M. Sjogren TELEP110NE 617-366-9011 X2281 Sg *ITY RELATED f1AINTENANCE October 1978 Page 1 of 3 NATURE OF LER OR OUTAGE MALFUNCTION EQUIP?!!.NT MAINTENANCE NUMBER CAUSli RLSulir C0ltRECTIVE ACTION  ;

RilR Valve V10-46A Corrective Outage Worn Parts f Dirt i Leakage Past Seat Replaced Disc FR 78-345 78-06 HPCI Valve V23-65 Corrective Outage Valve Inspection Sa tis factory None MR 78-364 78-06 During Trouble-shooting Reactor Water Cleanup Corrective Outage Worn Parts Excessive Seal Replaced Rotating Pump MR 78-590 78-06 Leakage Assembly "A" Diesel Generator Corrective Outage Dirt Noisy Relay Cleaned as Necessary 480V Auxiliary Power MR 78-705 78-06 Cabinet Reactor Water Cleanup Corrective NA Failed Gasket Excessive Flange Repaired Regenerative lleat MR 78-879 Leakage

  • Exchanger RCIC Testable Check Corrective Outage Worn Gasket Leakage Past Seat Repaired Valve MR 78-893 78-06 Surfaces .

Reactor Vessel Drain Corrective Outage Valve Stem and Unable to Open Replaced Valve .

Valve V2-99 MR 78-910 78-06 Disc Separation Valve i

i "D" RilR Service Water Corrective Outage Failed Seal Excessive Seal Replaced Seal , ,

Pump MR 78-936 78-06 Leakage  !

RilR Service Water Valve Corrective Outage Worn Packing Packing Leaks Replaced Valve ,

V89-B MR 78-953 78-06 t

a f

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Page 2 of 3 i Docket No. 50-271 SAFETY RELATED MAINTENANCE October 1978 NA1URE OF LER UUTAGE MALFUNCT i CAUSL I ItLSULT CORRECTIVE ACTION MAINTENANCE NEIDER  :

EQUIP: LENT .

?

System I Core Spray, RilR, Corrective Outage Failed Potential False Power Failure Replaced Transformer .

a f. ItPCI logic Bus Power MR 78-967 78-06 Trans former Alarm ,  !

Monitor Feedwater Check Valve Preventive Outage Valve Inspection Satisfactory None -

V2-96-A MR 78-971 78-06 .

a

, "B" Station Battery Charger Corrective Outage Failed Diodes f. Loss of liigh Voltage Replaced Diodes and MR 78-975 78-06 Broken Wire Control Repaired Broken Wire Reactor Vessel Drain Line Corrective Outage Manufacturing Linear Surface Indi- Indications Removed by CUW-16 MR 78-976 78-06 Defect cations Found During Mechanical Grinding and in-Service Inspectio i lland Filing "B" Reactor Recirculation Corrective Outage Construction Weld Linear urface Indi- Indications Removed by i Pump Support Welds MR 78-977 78-06 Defect cation,Found During Mechanical Grinding and '

In Service Inspec- Iland Filing tion IRM 7-41D Corrective Outage Failed Detector No Response Replace Detector MR 78-980 78-06 I r

1 Uninterruptible Power Corrective Outage Failed Capacitor Blown Fuses but Unit Replaced Capacitor and Supply 1-B MR 78-982 78-06 Remaine'd Operable Fuses ,

l ilCU 34-07 Valve III Corrective Outage Worn Packing Packing { Leak Replaced Cartridge Valve  ;

MR 78-986 78-06  !  ;

i ilPCI Valve 23-38 Corrective lutage Worn Packing Packing' Leak Adjusted Packing l i

MR 78-991 78-06

' l Alternate Cooling Cell Fan Corrective- hitage Failed Pick Up Coil 7an Inoperative Replaced Coil

(#1 West Tower) t1R 78-10045 78-06 IICU 18-27 Accumulator :orrective lutage Failed "O" Ring ..eaking Accumulator Replaced Accumulator stR 78-1009 78-06 i

Drywell Floor Drain Sump :orrective hitage  : logged System Sumps Could Not be Removed and Cleaned i System MR 78-1011 78-06 Pumped Valves, Cleared Piping

. _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ ._ _ _ _ _ _ .. _ . _ _ . . _ . . . _ ___._ _ _. ..__m . _ . _ _ . . __ _

IEIAILD MAIN'lLAAACE October 1978 page 3 ol 3 Docket No. 50-271 '

NATURE OF LLR OtHAGE MALEUNC1 -

CAUSL '

ItLSU LI CORRECTIVE ACTION IIAINTENANCE NU51BER

  • EQUIP: LENT . .

llCU 18-43 Valve 111 Corrective Outage Worn Packing Valve Leakage Replaced Cartridge Val,e MR 78-1012 78-06 Reactor Building Vent Corrective Outage Solenoid Valve SB-10 Would Not Ope Repaired Solenoid Valve. ,

Supply Valve SB-10 MR 78-1014 78-06 Supplying Opening .

Air Failed IRM-B Corrective Outage Defective Connector Instrument Would Not Repaired Connector MR 78-1017 78-06 Under Reactor Vessei Follow Power Chang ( s

  • IICII 14-31 Valve 13-126 Corrective Outage Worn Valve Seat Reactor Control Rod Replaced Worn Parts  ;

MR 78-1018 78-06 Drift t "B" Diesel Generator Corrective Outage Normal Operations low Governor Oil Added Oil MR 78-1028 78-06 Level Reactor Vessel Water Level Corrective Outage Out of Calibration Reads 10" tower Calibrated Unit Yarway 2-3-58B MR 78-1032 78-06 Than Other Yarways  !

Main Steam Isolation Valve Corrective Outage loose Bolting Speed Control Valve Replaced Control Valve V2-86-C MR 78-1049 78-071 Sheared from its and Bolting.

LER 78-32 Mount Causing MSIV to Close too fast.

Reactor Recirc Cross Corrective Outage Worn Packing Leakage Replaced Packing "

Connect Valve V2-653 MR 78-1055 78-08 Reactor Water Cleanup Pump Corrective Outage Normal Operations Low Oil Added Oil MR 78-1064 78-07 a

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