ML19253B529

Monthly Operating Rept for Sept 1979

ML19253B529
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	10/12/1979
From:	Sjogren R VERMONT YANKEE NUCLEAR POWER CORP.
To:
Shared Package
ML19253B528	List: ML19253B527 ML19253B529
References
NUDOCS 7910160372
Download: ML19253B529 (7)

Text

VERMONT YANKEE NUCLEAR POWER STATION MONTHLY STATISTICAL REPORT 79-09 FOR THE MONTH OF SEPTEMBER, 1979 7910160

/%

OPERATING DATA REPORT DOCKET NO. 50-271 DATE 791012 COSIPLETED BY R.M.

S]ogren TELEPHONE (617) 36e-9011 X2281 OPERATING STATUS Notes

1. Unit Name:

Ver-ont Yankee Seotember 1979

2. Reporting Period:

3. Licensed Thermal Power (51Wti:

1,593 540

4. Nameplate Rating (Gross SIWE):

5. Design Electrical Rating (Net SIWE): 514 (open cvele) 504 ( :losed cycle)

6. Slaximum Dependable Capacity (Gross 51We):

535 514

7. Slaximum Dependable Capacity (Net 51We):

8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since I ast Report. Give Reasons:

4

9. Power Level To Which Restricted.If Any(Net SIWE):

10. Reasons For Restrictions.If Any:

This Stonth Yr..to.Date Cumulative

11. Hours in Reporting Period 720 6.551

12. Number Of Hours Reactor Was Critical 512 5,851.31 49,741.14

13. Reactor Resene Shutdown Hours 0

0 0

14. Hours Generator On-Line 506 5,814.78 47/947.78

15. Unit Reserve Shutdown Houn 0

0 0

16. Gross Thermal Energy Generated (5tWH) 705,627.5 8,757,691.5 67,144,509.0

17. Gross Electrical Energy Generated (51WH) 228,616 2,919,694 22,259,102

18. Net E'ectrical Energy Generated (31WH) 213.167 2,766,874 21,086,397

19. Unit Senice Factor 70.3 88.8 77.9

20. Unit Availability Factor 70.3 88.8 77.9

21. Unit Capacity Factor (Using 51DC Net) 58.7 83.8 67.9

22. Unit Capacity Factor (Using DER Net) 57.6 82.2 66.c

23. Unit Forced Outage Rate 0.0 1.7 6.6

24. Shutdowns Scheduled Over Next 6 Stonths (Type. Date.and Duration of Eschi:

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

November 1, 3979

26. Units in Test Status (Prior to Commercial Operation):

Forecast Achieved INITIA L CRITICALITY INITIAL ELECTRICITY C0515tERCIAL OPERATION

~'

iq' (9/77)

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-271 UNIT Vermont Yankee 791012 DATE CONtPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 X2281 5f0NTIf September 19/9 DAY AVERAGE DAILY POWER LEVEL DAY AVER AGE DAILY POWER LEVEL (51We-Net)

(Side-Net) 422 1

430 37 2

426 gg 421 3

422 19 423 4

424 20 426 5

423 21 403 6

419 22 8

k 7

421 23 0

3 427 24 0

9 428 25 0

10 426 26 0

11 455 0

27 12 424 23 0

13 421 29 0

14 416 30 0

15 419 31 0

16 426 INSTRUCTIONS On this format. list the average d:dy unit power lesel in SlWe Net for each day in the reporting month. Compute to the nesrest whole megawatt.

(u!77) v I

s

UNITSilulDOWNS AND POWER REDUCTIONS DOCKET NO. 50-271 UNIT N AhlE Vermont Yankee DATE 791012 REPORT Af 0NTig Sept. 1979 COhlPLETEll ity R. M. Siocren TELLPilONE IM U 300->U11 X2281

'3 a 3 c

E ce 3

I I'*"5CC 5 *.

Cause & Co,sective No.

D.ise E.

N$

3$e

~

Event E

U SE g7 g.g o$

e a c5 c Itcport a mo cu Prevent Itcentrence s

O e

O 79-17 790922 S

214 C

1 NA RC FtJELXX NA 1

2 3

4 F: Forced Iteason:

Elethod:

Exhibit G Instruci ons i

S: S(licif ulcil A.Eilnipment Failure (Explain) l-hlanual for Psepasation of D.sia 1

Il4faintenance of Test

? ?lanual Serain.

Entiy Sheets foi 1.icensee J

C ltefueling 3-Automatic Scram.

Event Itepent (Ll!lti l'ile INultl'G-D Itegulato y itestsiction 4-Other (Explain) 01611 li-Opci.itor Tsaining1 License Examination

, v I.Aihniniusative 5

G Opesational I esos (l!aplain)

Exlut,it I. Same Souice t,

l'8/17) 11 Othe liimpi.ain)

O

DOCKET NO.

50-271 UNIT Vermont Yankee q,

DATE 791012 c

COI!PLETED BY R. M. Sjogren r

L o TELEP110NE (617) 366-9011 X2281 SAFETY 1 ELATED !!AI.VfENANCE

- g OF LER OR UUTAGE HALFUNC' LION g

EQUIP!ENT MAINTENANCE NUlBER CAUSE

!!LSULi CORRECTIVE ACTION Main Steam line instrument Corrective NA Worn packing Leakage Replaced packing root valve MR79-342 RilR pump P-10-1A Corrective NA Worn seal Leakage Replaced mechanical seal MR79-402 RCIC steam valve V-13-131 Corrective NA Worn valve seat &

Leakage Lapped sent & disc, MR79-506 disc repacked valve "B" SBGT train Corrective LER 79-22/3L Depleted charcoal Failed freon test Replaced filter MR79-701 filter Emergency diesel generator Corrective NA Relay out of Generator breaker Recalibrated relay B syncronization check MR79-725 calibration closing slightly out relay of syncronization Torus level transmitters Corrective LER 79-24/3L Loose fittings Erroneous readings rightened fittings and LT-16A-38A6B PIR79-729 refilled reference legs "B" RilR service water pump Corrective NA Clogged Strainer liigh dif ferential Cleaned Strainer suction strainer

'fR79-739 pressure Containment air monitor

orrec t ive NA Accumulation of Valve failed Icak I)isassembled and cleaned valve VG-76B

'IR79-751 dirt test valve Primary Containment

orrective LER Accumulation of Valve failed leak l)isassembled and c1 caned atmospheric control valve IR79-773 forthcoming dirt test valve V16-20-20 O

DOCKET NO.

50-271 UNIT Vermont Yankee DATE 791012 COMPLETED BY R. M. Siogren TELEPHONE (617) 366-9011 X2281 REPORT MONTH September 1979 SU'elARY OF OPERATING EXPERIENCES Highlights Vermont Yankee operated at 61.5% of rated thermal power for the month of September, 1979. Gross electrical generation for the month was 228,616 MWHe, or 58.8% of design electrical capacity.

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

9-1 At the beginning of the report period, the plant was operating at 89% of rated thermal power, and in the process of coastdown

. for the refueling outage.

9-21 Power reduction for the scheduled refueling outage coc=enced at 2100 hours0.0243 days <br />0.583 hours <br />0.00347 weeks <br />7.9905e-4 months <br />.

9-22 At 0113 hours0.00131 days <br />0.0314 hours <br />1.868386e-4 weeks <br />4.29965e-5 months <br />, the generator was removed from the grid, with the reactor manually scrammed at 0825 hours0.00955 days <br />0.229 hours <br />0.00136 weeks <br />3.139125e-4 months <br />.

9-30 At the conclusion of this leport period, the plant was in the shutdown mode as the refueling outage continued.

_s 9

b 4

CORRECTION TO OPERATING DATA REPORTED AUGUFT 1979 DOCKET NO.

50-271 DATE 791012 COMPLETED BY R. M. Sjogren TELEPHONE (617) 366-9011 X2281 Unit Name Vermont Yankee Line No.

This Month Yr. to Date Cumulative 16.

Gross Thermal Energy Generated (M'n'H) 889,630.5 8,052,064 66,438,882 20.

Unit Availability Factor 86.4 91.0 77.9 21.

Unit Capacity Factor (Using MDC Net) 71.5 86.9 68.0 22.

Unit Capacity Factor (Using DER Net) 70.1 85.2 66.7 d

I