ML20125A412

Monthly Operating Rept of Subj Facility for Aug 78.(Encl to 7809150479

ML20125A412
Person / Time
Site:	Monticello
Issue date:	09/05/1978
From:	Myrabo A NORTHERN STATES POWER CO.
To:
References
NUDOCS 7809150482
Download: ML20125A412 (4)

Text

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i t NARRATIVE SIM RRY OF OPERATING EXPERIENCE l

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j. Docket No. 50-243

! Unit Monticello 3-i Capleted by A. L. Myrabo t Date Septenber 5,1978

! !O mi August ,

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I 8/01/78 Unitofflinefrom7/29/78shutdwn. Outage extended i due to high reactor water conductivity. '

e 8/01/78

! to Pwer operation.

! 8/08/78 i

8/09/78 Reactor scram. Oscillating mechanical pressure regulator

j. resulted in APmt high flux scram.

8/10/78 l to Pwer operation.

8/23/78 j 8/24/78 Reactor scram. LPRM pwer supply failure resulted in APRM i

high flux scram.

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f. .

l 8/25/78 l to P wer operation.

8/31/78 i

l NJrE: The unit load-follwed on 7' days in this period.

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-- __ _ _ -. _ _ _ _. _ _ . _ . _ _ _ . _ - ._ .. _ ,r. _ ._. _ _. .

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. OPERATING DATA REPORT DOCKET NO. 50-263 i DATE 9- 5-78 COMPLETED BY A. L. Myrabo a

TELEPHONE 612/295-5151 l

OPERATING SI'ATUS - - - -

INotes I

1. Unit Name

_ _ _ _ _ Monticello I i

2. Reporting periods _ AUGUST I 1

3. Licensed Thermal Power (MWt): __l670 t i

. 4. Nameplate Rating (Gross MWe): --___.__ 569 1 1

5. Design Electrical Ratina (Net MWe): _ b45.4 I i

6. Maximum Dependable Capacity (Gross MMe): __564 1 3

1 2 7. Maximum Dependable Capacity (Net MWe) e _ 536 1 __ l j 8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7)_ Since Last i Heport Give Reasonse __N/A

9. Power Level To Which Restricted, i f Any (Net MWe): __._N/A_ _ _____

j 10. Reasons For Restrictions. If Anys __N/A__ ___ __ ____

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l This Month Yr.-to-Date Cumulative

11. Hours In Reportina Period .

744 _ _5831 62856 l 12. Number of Hours Reactor Was Critical -- 725.9 5587.9 .__ 50756.3 l 13. Reactor Reserve Shutdown Hours 0.0 __ 0.0 __ 940.7

! 14 Hours Generator On-Line 709.2 5519.5 _ 49296.9 i

15. Unit Reserve Shutdown Hours __ 0.0 _ . _ _ _ 0.0 ____ 0.0 i 16. Gross Thermal Energy Generated (MWH) -_1067938 _ 8578993- _ 82233567 l 17. Gross Electrical Eneroy Generated (MWH) __359660 __2913670 __25286360

18. Net Electrical Energy Generated (MWH) __341310 __2792406 __24168780

! 19. Unit Service Factor. __ 95.3% ___ 94.7% 78.4%

20. Unit Availability Factor __ 95.3% ___ 94.7% ____ 78.4%

21. Unit Capacity Factor (Using MDC Net) __ 85.6% ___ 89.3% 71.7%

22. Unit Capacity Factor (Usino DER Net) __ 84.1% 87.8% 70.5%

l 23. Unit Forced Outage Rate __ 4.7% ___ 3.0% ____ 7.5%

24. Shutdowns Scheduled Over Next 12 Months (Type.-Date, and Duration of Each) i Refueling Outage -October 14, 1978. 40 Days _ _ ______

25. If Shut-Down At End Of Report Period Estimated Date Of'Startups__N/A_

26. Units In Test Status (Prior to Commercial Operation)

N/A Forecast Achieved INITIAL CRITICALITY ___ __

i 'INIT!AL ELECTRICITY = = - - ____

COMMERCIAL OPERATION __

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AVERAGE DAILY UNIT P0nER LEVEL, i

5 DOCKET NO. 50-263-

UNIT Monticello__

i DATE 9- 5-78.___

1 CohPLETED BY A. L. Myrabo TELEPHONE 612/295-5151 i

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MONTH -

_ AUGUST __

DAY AVERAGE DAILY PonER LEVEL DAY AVERAGE DAILY PONER LEVEL f

!, (MWe-Net) (MWe-Net) i 1 __

_, 34_ __ 17- _._ 535____-

i 2 327 -

__ 18 _ 536 ___

, 3 448 _ _- __ 19 ___ _ 395= --

l 4 _ _ 470 _ . , _ 20 __________ 493 _

5 413 21 __ 519 --__

6 467__ _ 22 _ --534 _____

l 7 __ 519__ _ _ 23 _ 5 3 7_,._ __

! 8 539 ___ __ 24 _ _____ ~362_

4 9 _ 285 __ _

25 _ __ 370__

l 10 __ 342__ _ 26 ___ 532 11 __ 512 __ 27 _ 541 _ _ . _ _ _ _

12 __

__531_ 28 532__ ____

13 430 ___ = 29 ___ 441__ _

) 14 ___ 534_ ___ 30 __ 505_ _

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! 15 _ 527 __ _ 31 _______ 475_

l6 __ __537 __

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!- INSTRUCTIONS

, - Un this format, list the average daily unit power level in MWe-Net-for-each

day in the reporting month. Compute to the nearest whole mecawatt.

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DOCKET NO. 50-263 -

UNIT SHUTDOWNS AND POWER REDUCTIONS UNIT NAME Mtmticello DATE kmt- 5 1078 COMPLETED BY A_"L Mrrabo REPORT MONTH Asimiet TELEPHONE 612/295-5151

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- = .. .::

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r ~ s. 4 Licensee ,E q, M Cause & Corrective 3g_ g jg5 Event 5? 5-? Attain to

b. Date 3 AC Psetem Recurrena

2. E E j5g Repors = y' 2-A 4 LER-78-14 RB VALVDP Continuation of 7-29-78 outage. Out-

'11 8-1-78 F 17.8 age extexled due to high reactor water conducitivty.

3 N/A CC INSTRU-C Oscillating mechanical pressure reg-12 8-9-78 F 9.5 H -

ulator caused APRM high flur scraan. ,

0- H 4 N/A ZZ ZZZZZZ . Imad following per system dispatcher.

-13 8-13-78 S 0 -B 4- N/A ZZ ZZZZZZ Weekly surveillance and pican.iition- l 14 8-19-78 S ing after rod adjustment.

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A 3 IA INSTRU-E APRM high flur scram caused by LPRM 15 8'24-78 F 7.5 N/A power styply failure. Power supply replaced.

3 4 I' 2 F Forced Reason: Method: Exlubs: C. Instructions A-Equipment Failure f Esplaint I-Manual for Preparai6.sn of Data S Scheduled B-Mainte:iance of Test . 2-Manual Scram. Entry Sheets for Lseensee C.Refuefing .L Automatic Stram. Event Report (LERI Fde tNUREG-D-Regulatory Resirsction 4-Other t Esplain) Oltit i E-Operator Training & Lkenw rsamination F- Adnunistrative 5 G-Operationat Eeror iFsp12:,0 Estubit I Same S.m se

(*8 ~7) Il-Other t E splano