ML20135B542

Monthly Operating Rept for June 1985

ML20135B542
Person / Time
Site:	Monticello
Issue date:	06/30/1985
From:	Musolf D, Myrabo A NORTHERN STATES POWER CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
NUDOCS 8509110095
Download: ML20135B542 (5)

Text

OPERATING DATA REPORT DOCKET NO.

50-263______

DATE 7-1-85____

COMPLETED BY A. L. Myrabo TELEPHONE 612/295-5151 OPERATING STATUS INotes I

1. Unit Name

________________________Monticelto l

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2. Reporting period: ___________________ JUNE I

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3. Licensed Thermal Power (MWt):

____________1670 l

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4. Nameplate Rating (Gross MWe): _____________569 l

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5. Design Electrical Rating (Net MWe):

_____545.4 I

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6. Maximum Dependable Capacity (Gross MWe): __564 l

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7. Maximum Dependable Capacity (Net MWe):

____536 l__________________________l

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 (Net MWe): ___N/A_________________'__

10. Reasons For Restrictions, If Any:

__N/A_____________________________________

This Month Yr.-to-Date Cumulative

11. Hours In Reporting Period

_____720

_____4343

____122736

12. Number Of Hours Reactor Was Critical

___712.0

___3777.9

__ 93864.1

~ 13. Reactor Reserve Shutdown Hours

_____0.0

______0.0

_____940.7

14. Hours Generator On-Line

___707.7

___3677.8

__ 91664.5

15. Unit Reserve Shutdown Hours

_____0.0

______0.0

_______0.0

16. Gross Thermal Energy Generated (MWH)

_1150579

_ 5919573

_139114119

17. Gross Electrical Energy Generated (MWH) __392849

__2026557

__47211610

18. Net Electrical Energy Generated (HWH)

__377157

__1947775

__45132828

19. Unit Service Factor

__ 98.3%

___ 84.7%

____ 74.7%

20. Uni t Ava i lab i li ty Factor

__ 98.3%

___ 84.7%

____ 74.7%

21. Unit Capacity Factor (Using MDC Net)

__ 97.7%

___ 83.7%

____ 68.6%

22. Unit Capacity Factor (Using DER Net)

__ 96.0%

___ 82.2%

____ 67.4%

23. Unit Forced Outage Rate i.7%

0.9%

5.1%

24. Shutdowns Scheduled Over Next 12 Months (Type, Date, and Duration of Each)

__May 10, 1986 - 1986 refueling outage - 41 days ________________________

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

26. Units In Test Status (Prior to Commercial Operation): N/A Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION 8509110095 850630 PDR ADOCK 05000263 R

PDR Ii

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-263______

UNIT Monticelto__

DATE 7-1-85____

COMPLETED BY A. L. Myrabo TELEPHONE 612/295-5151 l

4 MONTH ______ JUNE l

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) l 1

__________561____________

17

__________551____________

__________490____________

18

__________550____________

a 3

__________551____________

19

__________550____________

i I

4

__________537____________

'~O

__________548____________

5

__________549.___________

21

__________546 6

__________54i____________

99

__________547____________

7

__________550____________

'3

__________538____________

8

__________428____________

24

__________54' 9

__________534____________

'5

________544____________

~

10

___550____________

'6

__________541 11

__________549____________

27

__________544 i'

____214__

'8

__________541____________

13

__________432____________

29

__________556____________

14

__________520____________

30

__________516____________

15

__________551____________

31 16

__________543____________

INSTRUCTIONS i

On this format, List the average daily unit power Level in MWe-Net for each dcy in the reporting month.

Compute to the nearest whole megawatt.

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i NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE 4

DOCKET NO.

50-263______

DATE 7-1-85____

COMPLETED BY A. L. Myrabo TELEPHONE 612/295-5151 MONTH ______ JUNE 6-1-85 to Power Operation.

6-6-85 6-7-85 Power reduced to 60% to perform control rod seguence exchange.

6-8-85 to Power Operation.

6-11-85 t

i 6-12-85 Reactor scram due to personnet error during survellLance test.

6-13-85 i

to Generator on-Line, power operation.

6-30-85 4

4 SPENT FUEL STORAGE UPDATE i

Fuet assemb Lies in core 484 Fuel assemb Lies in spent fuel storage pool 700 Licensed capacity 2237 1

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UNIT SliCIDOWNS AND POWER REDUCTIONS DOCKET NO. 50-263 UNIT NAME Monticello DATE 7-2-85 COMPl.ETED NY A-L. Myrabo REPOR T.MONTil JIIMg TELEPilONE 612/?45-5151 l

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Esinbis G Insionssions S-S.fwJuleil A Equapaneau FailureeEsplaint I-klanual f.n Preparation ui Daia B Mainterunee or Tes:

2-klanual Serain.

Eni > Sheets for Licensee C-Refueling 3-Autunutic Sstaan.

Event Repo tLFRIFile:WREG-D RegiJaniw> Ressekthan 4-Oshes ll:xplamil 0161) l'-Opesas.n Tsaianng1 Ii.ene 1 uniinathm F-AJnunnesais e 5

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Northern States Power Company 414 NicoHet Mad Minneapoks. Minnesota 55401 Telephone (612) 330-5500 July 11, 1985 Director, Office of Resource Management U S Nuclear Regulatory Commission Washington, DC 20555 MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Monthly Operating Report June, 1985 Attached are twelve copies of the Monthly Operating Report for June, 1985 for the Monticello Nucient Generating Plant.

An apparent discrepancy between the NRC gray book values for cumulative thermal 5H and the fuel exposure histories from the process computer has been recently discovered. The gray book monthly values for critical and on-line time, EH(th), EH(e)-gross and 5H(e)-net were entered into a program to check the cumulative values.

A significant error was discovered for December,1974 in the EH(th). As a result of the checking, several arithmetic errors were discovered and the following corrections were made:

Cumulative critieni time was increased by 170.8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> Cumulative on-line time was decreased by 16.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> Cumulative MWh(thermal) was decreased by 8039268 EH(th)

Cumulative 5H(electric)-net was increased by 10170 ET(e)

Cumulative MWH(e)-gross is correct.

Since the reporting was computerized in 1978, no values after that were checked. Also, the other cumulative values (forced outage, etc.) were not checked. The monthly values were not recalculated, just transcribed from the monthly reports.

The June, 1985 monthly report has been changed to reflect the above new cumulative values.

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[g David Musolf Manager of Nuclear Support Services DMM/MMV/ dab cc:

Regional Administrator-III NRC NRR Project Manager, NRC NRC Resident Inspector MPCA Attn: J W Ferman s \\

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