ML20115H565

Monthly Operating Rept for June 1996 for Monticello Nuclear Generating Plant

ML20115H565
Person / Time
Site:	Monticello
Issue date:	06/30/1996
From:	Richard Anderson, Paustian H NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9607230208
Download: ML20115H565 (5)

Text

1 i

Northem States Power Company i

' Monticello Nuclear Generating Plant 2807 West Hwy 75 Monticello, Minnesota $s362-9637 July 12,1996 Monticello Technical Specification 6.7.A.3 US Nuclear Regulatory Commission .

Attn: Document Control Desk Washington, DC 20555 MONTICELLO NUCLEAR GENERATING PLANT Docket No. 50-263 License No. DPR-22 Submittal of Monticello Monthly Operatina Report for June,1996 In accordance with Monticello Technical Specification 6.7.A.3, the report of operating statistics for the Monticello Nuclear Generating Plant for ths Month c; June is provided.

Please contact Marv Engen, Sr Licensing Engineer, at (612) 295-1291 if you require further information.

< SoA Roger O Ande.rson Director Licensing and Management issues l l

c: Regional Administrator- 111, NRC NRR Project Manager, NRC l Sr Resident inspector, NRC l State of Minnesota l l

Attn: Kris Sanda J Silberg I

3

! 9607230208 960630 PDR ADOCK 05000263 /[!

R PDR

1

. 1 OPERATING DATA REPORT j DOCKET NO. 50-263 I DATE 7- 1-96 COMPLETED BY H. H. Paustian TELEPHONE 612/295-5151 ,

OPERATING STATUS

] Notes ]

1. Unit Name -

Monticello ] ]

2. Reporting eriod: June ] ]

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

4. Nameplate Rating (Gross MWc): 583.5 ] ]

5. Design Electrical Rating (Net MWe): 559.9 ] ]

6. Maximum Dependable Capacity (Gross MWe) : F;78.5 ] ]

7. Maximum Dependable Capacity (Net MWe) : 550.5 ) ]

8. If Changes Occur in Capacity Ratings (Itsms Number 3 Through 7) Since Last i Report, Give Reasons: New turbine installed; new ratings estimated pending completion of performance testing

9. Power Level To Which Restricted, If Any (Net MWe): N/A

10. Reasons For Restrictions, If Any: __N/A I

THIS MONTH YR.-TO-DATE CUMULATIVE

11. Hours In Reporting Period 720 4367 219168

12. Number Of Hours Reactor Was Critical 629.5 3280.4 179040.3

13. Reactor Reserve Shutdown Hours 0.0 0.0 940.7

14. Hours Generator On-Line 609.8 3128.1 175998.9

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 940601 4645011 272697800

17. Gross Electrical Energy Generated (MWH) 322019 1571098 92201129

18. Net Electrical Energy Generated (1G04) 306937 1499014 88230386

19. Unit Service Factor 84.7% 71.6% 80.3%

20. Unit Availability Factor 84.7% 71.6% 80.3%

21. Unit Capacity Factor (Using MDC Net) 79.5% 64.0% 75.1%

22. Unit Capacity Factor (Using DER Net) 78.2% 62.9% 73.8%

23. Unit Forced Outage Rate 15.3% 6.4% 3.5% '

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

_None

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 l

l i

l I

l l

A -

' ' ' AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-263 UNIT' Monticello -

DATE 7 .1-96 COMPLETED BY H. H. Paustian TELEPHONE- 612/295-5151 MONTH OF June DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) '(MWe-Net) 1 560. 17 547.

2 559. 18 549.

3 559. 19 550._

4 560. 20 549.

5 560, 21 507.

6- 558. 22 499.

7 545. 23 550.

8 530. 24 547.

9 467. 25 551.

10 -10. 26 549.

11 -6. 27 542.

12 -6. 28 541.

13 24. 29 539.

14 72. 30 541.

15 27.

16 230.

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.

. NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO. 50-263 DATE. 7 l-96 COMPLETED BY H. H. Paustian TELEPHONE 612/295-5151 MONTH JUN 06-01-96.

to Power operation 06-09-96 06-09-96 Reactor scram following loss of all Stator Water Cooling and turbine runback.

06-09-96_ Outage for. repairs to Stator Water to Cooling System.

< 06-13-96 i

06-13-96 Reduced power operation while testing Stator l to Water Cooling' System l 06-15-96

! 06-15-96 Reactor scram following Panel C-83 electrical problems .

resulting in sensed loss of Stator Water Cooling and i turbine runback. j t

06-15-96 i to Power operation l 06-21-96 l 06-21-96 Power reduced to 70% due to Isophase Bus Cooling j

problems. Power returned to 100%. j 06-22-96 Power reduced to 70% for Isophase Bus Cooling' repairs <

l Power returned to 100%.

06-22-96 to Power operation.

06-30-96 Note: Power operation defined as essentially 100% of rated power except for weekend load drops for-l specified surveillance testing.

t i

IMIT SHUTDOWNS AND POWER REDUCTIONS D0GET No. 263 -

INIT NAME Monticello .

DATE 77-02-%

COMPIETED BY 11. H. Paustian REPORT MONTH June TELEPHONE [612/295-5151 -

No. Date Duration Reason Method LER System . Cause & Corrective Ty(pe

1) (hours) (2) of No. Code e Action to Shutdown (4) (5) Prevent Recurrence (3) 4 06 % F 90.3 A 3  % -006 TJ P Reactor scram after loss of both Stator Vater Cooling pumps.

5 06 % S 36.8 B 4 N/A TJ P Power limited to 50% during testing of Stator Vater Cooling repairs 6 06 % F 19.8 A 3  % -007 IO IL Attempted replacement of indicator light on Generator Condition Monitor caused turbine runback and subsequent reactor scram.

7 06 % S 25.6 B 4 N/A TJ P Power limited to 50% during testing of Stator Vater Cooling repairs.

8 06 % F 7.6 A 4 N/A TB BLO Power reduced to 70% due to Isophase Bus Cooling problems.

9 06 % S 9.0 B 4 N/A TB BID Power reduced to 70% for Isophase Bus cooling repairs.

1 2 3 4 F: Forced Reason: Method: Draft IEEE Standard S: Scheduled A-Equipment Failure (Explain) 1-Manual 805-1984(P905-D5)

B-Maintenance or Test 2-Manual Scram C-Refueling 3-Automatic Scram 5 D-R lator Restriction 4-Other (Explain) IEEE Standard 803A-1983 E rator Training & License Examination F- inistrative G-Operational Error (Explain)

H-Other (E plain)

_ _ _ _ _ _ _ _ _ . . . . . . _ _ _ - _ . _ . . _ . . . . _ _ - . _ _ _ . . .___.._.___ _ _ _ . _ _ .._ __ _