ML20154L347

Monthly Operating Rept for Sept 1998 for Monticello Nuclear Generating Plant.With

ML20154L347
Person / Time
Site:	Monticello
Issue date:	09/30/1998
From:	Paustian H, Voth M NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9810190252
Download: ML20154L347 (5)

Text

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l Northem States Power Company t

1 Monticello Nuclear Generating Plant 2807 West Hwy 75 I Monticello, Minnesota 55362 9637 i

October 8,1998 US Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 MONTICELLO NUCLEri GENERATING PLANT Docket No. 50-265 License No. DPR-22 Submittal of Monticello Monthly Operating Report for September,1998 I

In accordance with Monticello Technical Specification 6,7.A.3, the report of operating statistics  !

for the Monticello Nuclear Generating Plant for the Month of September is provided.

Please contact Marcus H. Voth, Project Manager - Licensing at (612) 271-5116 if you require )

further information. 1 Mr '

Marcus H. Voth r:

Project Manager - Licensing 0 Nuclear Energy Engineering Dept.

l c: Regional Administrator-lli, NRC f NRR Project Manager, NRC Sr Resident inspector, NRC State of Minnesota

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Attn: Kris Sanda J Silberg y

l 9810190252 980930 PDR ADOCK 05000263.

R PDR

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,' OPERATING DATA REPORT l

DOCKET NO. 50-263

, DATE 10- 1-98 COMPLETED BY H. H. Paustian TELEPHONE 612/295-5151 l

l OPERATING-STATUS j

] Notes j l l 1. Unit Name -

Monticello ] ]

l. 2. Reporting eriod: September ] ]

3. Licensed T ermal Power (MWt) : 1670 ) ]

l 4. Nameplate Rating (Gross MWe): 576.5 ] ]

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5. Design Electrical Rating (Net MWe): 552.9 ] ]

6. Maximum Dependable Capacity (Gross MWe): 571.5 ] ]

7. Maximum Dependable Capacity (Net MWe): 543.5 ] ]

l 8.HIf Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:

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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 6551 238896 12 Number Of Hours Reactor Was Critical 571.4 5513.0 195557.1 i

13. Reactor Reserve Shutdown Hours 0.0 0.0 940.7

-14.. Hours Generator On-Line 557.4 5452.7 192386.9 l 15. Unit Reserve Shutdown Hours- 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 923153 8696891 299552496

17. Gross Electrical Energy Generated (MWH) 313719 2961379 101442754

18. Net Electrical Energy Generated (MWH) 299279 2831618 97092675

19. Unit Service ~ Factor 77.4% 83.2% 80.5%

30. Unit Availability Factor 77.4% 83.2% 80.5%

21. Unit Capacity Factor (Using MDC Net) 76.5% 79.5% 75.7%

22. Unit Capacity Factor (Using DER Net) 75.2% 78.2% 74.4%

'23. Unit Forced Outage Rate 21.6% 3.8% 4.4%

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

_None I 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 l

l INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION l

s l

l AVERAGE DAILY UNIT POWER LEVEL r

DOCKET NO. 50-263-UNIT Monticello-DATE 10- 1-98~ l l COMPLETED BY .H. H. Paustian l l

TELEPHONE 612/295-5151 ]

i MONTH OF September DAY- AVERAGE DAILY POWER LEVEL DAY -AVERAGE DAILY' POWER LEVEL (MWe-Net) (MWe-Net) l 1 540. 17 537.

1 2 538. 18 539. I 3 540.- 19 540.

1 4 540. 20 543.  !

5 '539, 21 545.

6- 539. 22 551.

I 7 542. 23 553.

L 8' 542. 24 554.

9 113. 25 553.

10 -7. 26 550. l 11 -6. 27 -551.

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12 7. _

28 549.

l. 13' -8. 29 549.

! 14' -9. 30 553.

l -15 -10.

l- 16- 417.

i 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.

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' NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE

• . DOCKET NO. 50-263 DATE 10- 1-98 COMPLETED BY H. H. Paustian TELEPHONE 612/295-5151 MONTH SEP 09-01-98 to Power operation.

09-09-98 09-09-98 Manual scram inserted in response to loss of condenser vacuum due to offgas recombiner problems.

09-09-98 to Shutdown for repairs to offgas recombiner system.

09-16-98 09-16-98 to Power operation.

09-30-98 l

Note: Power operation defined as essentially 100% of rated power except for weekend load drops for specified surveillance testing.

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UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-263 #

UNIT NAME Monticello DATE 10-02-98 COMPLETED BY H. H. Paustian REPORT MONTH September TELEPHONE 612-295-5151 Method of System Comp Cause & Corrective Type Duration Reason Shutdown Code Code Action to No. Date (1) (hours) (2) (3) LER No. (4) (5) Prevent Recurrence 10 09-09-98 F 162.6 A 2 98-004 WF PCV Manual scram inserted in response to decreasing condenser vacuum due to offgas recombiner problems 1 2 3 4 F Forced Reason: Method: Draft IEEE Standard S Scheduled A Equipment Failure (Explain) 1 Manual 805-1984 (P805-D5)

B Maintenance or Test 2 Manual Scram C Refueling 3 Automatic Scram 5 D Regulator Restriction 4 Other(Explain) IEEE Standard 803A-1983 E Operator Training & Licensing Examination F Administrative G Operational Error (Explain)

H Other(Explain)

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