ML20082B572

Monthly Operating Rept for June 1991 for Monticello Nuclear Station

ML20082B572
Person / Time
Site:	Monticello
Issue date:	06/30/1991
From:	Parker T, Paustian H NORTHERN STATES POWER CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9107150368
Download: ML20082B572 (5)

Text

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Northem States Power Company 414 Nicollet Mall Minneapolis, Mitinesota 55401 1927 Telephone (612) 330-5500 July 10, 1991 Monticello Technical Specifications Section 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 Monthly Operating Report June. 1991 At.

^ed is the Monthly Operating Report f or June, 1991 for the Monticello Nuclear Generating Plant.

/

bf>tMb V

g Thomas M Parker Manager Nuclear Support Service TMP/j lk c:

Director, Office of Resource Management Regional Administrator-III, NRC NRR Project Manager, NRC NRC Resident Inspector MPCA Attn: J W Ferman Attechment f

9107150368 910630 om: OsOO m s R

PDR

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O@ ERAT 2NG DATA REPORT 9

• c DOCKET NO.

50-263 DATE 7-2-91 COMPLETED BY 11. 11. Paustian TELEPHONE 612/295-5151 OPERATING STATUS

! Notes i

1. Unit Name :

Monticello 1

1

3. Reporting period:

JUNE

3. Licensed Thermal Power (MWt):

1670 t

t

4. Nameplate Rating (Gross MWe):

569 1

1

5. Design Electrical Rating (Net MWe):

545.4 1

1

6. Maximum Dependable capacity (Gross MWe):

564 1

1

7. Maximum Dependable Capacity (Net MWe):

- 536 1

1

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. Reasone For Restrictions, If Any: __N/A THIS MONTH YR.-TO-DATE CUMULATIVE AA. Hours In Reporting Period 720 4343 175320

13. Number Of Hours Reactor Was Critical 661.6 2691.7

- 139034.5

13. Reactor Reserve Shutdown Hours 0.0 0.0 940.7

14. Hours Generator On-Line 644.1 2623.2

~~136373.7

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 155#386

- 3937620 208266554

17. Gross Electrical Energy Generated (MWH) - 352761 1316040 70444600

18. Net Electrical Energy Generated (MWH)

- 335166

~~1253090

~~67360337

19. Unit Service Factor 89.5%

60.4%

77.8%

20. Unit Availability Factor

~~ 89.5%

60.4%

77.8%

21. Unit Capacity Factor (Using MDC Net) 86.8%

53.8%

71.7%

22. Unit Capacity Factor (Using DER Net) 85.4%

52.9%

70.4%

22. Unit Forced Outage Rate

~~ 10.5%

6.4%

4.0%

24. Shutdowns Scheduled Over Next 12 Months TType, Date, ana Duration of Each)

__None

25. If Shut Down At End Of Report Period, Estimated Date Of Startup:N/A

26. Units In Test Status (Prior to Commercial Operation): N/A Forecast Achieved INITIAL CRITICALITY INITIAL ELECTRICITY COMMERCIAL OPERATION

NARRATIVE

SUMMARY

OF OPERATING EXPERIENCE DOCKET NO.

50-263 DATE 7-2-91 COMPLETED BY H.

H.

Paustian TELEPHONE 612/295-5151 MONTH JUNE 6-1-91 to Power operation.

6-5-91 Scram during Group 1 Valve Isolation surveillance testing.

One half of a Group 1 isolation signal was 6-5-91 manually inserted for the testing when the other half of the isolation signal spuriously occurred for a very brief time.

6-5-91 to Generator off-line for scram recovery.

6-6-91 Plant startup after scram recovery.

High Safety Relief Valve tailpipe temperatures indicated a leaking SRV.

As power was being decreased for a plant shutdown to repair the SRV, a 6-6-91 reactor scraa occurred due to IRM Hi Hi signals caused by reactor cooldown resulting from insufficient decay heat in the core.

Decay heat was low due to only 4.5 days of operation following refueling.

6-6-91 to Generator off-line for SRV repairs.

6-8-91 6-8-91 to Generator on-line.

Power operation.

6-30-91 Note: Power operation defined as essentially 100% of rated power except for weekend load drops for specified surveillance testing.

f AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-263 UNIT Monticello~

DATE 7-2-91 COMPLETED BY H.

H.

Paustian TELEPHONE 612/295-5151 MONTH JUNE DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net) 1.

503 17 529 2

530 la 530 3

530 19 524 4

531 20 529 5-302 21 535 6

-12 22 537 7

-7 23 534 8

29 24 529 9

502 25 507 10 487 26 551 11 522 27 530

~12' 528 28 532 13 528

- 29 528 14-530 30 508 15 526

-16 533 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 meguwatt.

UNIT SHIRD0VNS AND POVER REDUCTIONS D00TT NO. 50-263 UNIT NAME 7enticello DATE V7-02-91 COMPLETED BY 11. H. Paustian REPORT MONI'd June TELEPHONE _612/295-5151-Duration Reason Method LER Syst'em Cause & Corrective No.

Date Ty(pe (hours)

(2) of No.

Code e

Action to 1)

Shutdovn (4)

(5)

Prevent Recurrence (3) 4 06-05-91 F

26.9 H

3 91-014 JM N/A A reactor scram occurred from 100% power due to a i

spurious Main Steam isolation signal in the A l

channel with B channel tripped for surveillance.

5 06-06-91 F

49.0 H

3 91-015 SB RV Uhile shutting down to repair leaking Safety Rel.

Valve, received IRM Hi-Hi flux scram due to reac.

increase from cooldown due to lov decay heat.

l t

t 1

2 3

4 F: Forced Reason:

Method:

Draft IEEE Standard S: Scheduled A-Equipment Failure (Explain) 1-Manual 805-1984(P805-DS)

B-Mainte'iance or Test 2-Manual Scram C-Refueling 3-Automatic Scram 5

D-Regulator Restriction 4-Other (Explain)

IEEE Standard 803A-1983 E-0 rator Training & License Examination F-inistrative G-Operational Error (Explain)

H-Other (Explain) i

-.