AECM-86-0250, Monthly Operating Rept for Jul 1986

Monthly Operating Rept for Jul 1986

ML20214K272
Person / Time
Site:	Grand Gulf
Issue date:	07/31/1986
From:	Hobbs S, Kingsley O MISSISSIPPI POWER & LIGHT CO.
To:	Taylor J NRC OFFICE OF ADMINISTRATION (ADM), NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
AECM-86-0250, AECM-86-250, NUDOCS 8608210011
Download: ML20214K272 (5)

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DOCKET NO. 50-416 UNIT 1

DATE 08/14/86 COMPLETED BY S. H. Hobbs TELEPHONE 969-2458 MONTH

' July 1986 DAY AVERAGE DAILY POWER LEVEL-DAY AVERAGE DAILY POWER LEVEL (MWe-Net)

(MWe-Net)-

1 960 17 926-2 931 18 906 3

923 19 613 4

626 20 612 5

671 21 781 6

673 22 839 7

806 23 835 8

929 24 839-9 944 25 535 10 945 26 0

11 929 27 179

.12 633 28 738 13 652 29 846 14 841 30 840 15 927 31 821 16.

929 4

8609210011 860731 PDR

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DOCKET NO.

50-416 DATE 8/14/86 COMPLETED BY S. H. Hobbs TELEPHONE 969-2458 20PERATING S'ATUS T

?1. LUnit Name: GGNS UNIT 1 l Notes:

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Reporting Period: July 1986-l l

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Licensed Thermal Power (MWt): 3833 MWt l

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.4.1 Nameplate Rating (Gross NWe): 1372.5 MWe l

l 5'. -Design Electrical Rating (Net MWe): 1250 MWe l

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6. ; Maximum Dependable Capacity (Gross MWe):.1157 MWe l

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Maximum Dependable Capacity (Net MWe):-1108 MWe l

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'If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report.

Give Reasons:

-N/A 9.

Power Level To Which Restricted, If Any (Net MWe):

N/A

10. Reasons For Restrictions, If Any:.Unless otherwise noted, reductions in daily unit power level are for economic and system load demand considerations.

This Month Yr to Date Cumulative

11. Hours In Reporting Period 744 5,087 15,585

12. Number of Hours Reactor Was Critical 715.2 4,734.4 11,459.6

13. Reactor Reserve Shutdown : Hours 0

0 0

14. Hours Generator On-Line 700.2 4,614.8 10,361.8-

15. Unit Reserve Shutdown Hours 0

0 0-

16. Gross Thermal Energy Generated (MWH) 2,040,720 12,582,529 28,539,022

17. Gross Electrical. Energy Generated (MWH) 598,250 3,745,780__

8,518,090

18. Net Electrical Energy Generated (MWH) 567,106 3,544,276 8,019,988

-19.1 Unit Service Factor:

94.1 90.7-76.9 20.. Unit Availability Factor 94.1 90.7 76.9

21. Unit' Capacity: Factor (Using MDC Net) 68.8 62.9 58.9 22., Unit Capacity Factor (Using DER Net) 61.0 55.7 52.2

'23. Unit Forced Outage Rate 5.9 9.3 9.7

'24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

Refueling Outage; September 5,1986; approximately 60 days

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

NA

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

Forecast Achieved

. INITIAL CRITICALITY 08/18/82 INITIAL ELECTRICITY 10/20/84 COMMERCIAL OPERATION 07/01/85 J13ATTC86081201 - 2

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4 UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-416' UNIT NAME 1

DATE 08/14/86 COMPLETED BY S. H. Hobbs TELEPHONE 969-2458 REPORT MONTH-JULY l

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.l l Method of l Licensee. l l'

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l No. l Date l Type lDurationi Reason l Shutting Downl Event l System lCenponent l Action To l

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(2) l Reactor l Report #

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Prevent Recurrence l

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l l86-09l07/25/861 F l 43.8 l

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86-025 l

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-1.A power supply breaker was

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l inadvertently bumped open causing l l

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.l-l The reactor scrammed on the scram l_

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l l-l l discharge volume high high level 1

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[ drifted open.. Pro'cedural controlsl.

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l applicable areas to assess the l

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1 2

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F: Forced Reason:

Method:

Exhibit G - Instructions S: Scheduled A-Equipment Failure 1-Manual for Preparation of Data (Explain) 2-Manual Scram Entry Sheets for Licensee B-Maintenance or Test 3-Automatic Scram Event Report (LER) i l

C-Refueling 4-Continued File (NUREG-0161)

-4 D-Regulatory Restriction 5-Reduced load i

E-Operator Training &

6-Other Licensing Examination F-Administrative.

5 G-Operational Error Exhibit 1-Same Source (Explain)

H-Other-(Explain)

-*In accordance with NUREG 1022 l

J13ATTC86081201 :

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c MAIN STEAM SAFETY RELIEF VALVE CHALLENGES DOCKET NO.

50-416 UNIT.

1-DATE 08/14/86 COMPLETED BY S.H. Hobbs TELEPHONE 969-2458 Date of Occurrence:

07/25/86 Plant Operating Condition:

Rx Power (MWT) 3000-Rx Pressure 1006 Rx Mode 1

Rx Power (MWE) 885-Rx Temperature 525*F Number of main steam SRV's:

20-Number of SRV's affected by event:

2 Narrative:

On. July 25, 1986 at approximately 1520 hours0.0176 days <br />0.422 hours <br />0.00251 weeks <br />5.7836e-4 months <br /> the reactor scrammed on a scram discharge volume high-high level. A power supply breaker that was inadvertently

-cpened caused an isolation of the instrument air supply to the scram discharge valves and to'the main steam' isolation valves (MSIVs). The scram discharge valves opened and the MSIVs closed due to loss of air pressure. Safety Relief Valves B21F051D and B21F051B lifted once each.

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MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi teMhMiddE P. O. B O X 164 0, J A C K S O N, MIS SIS SIP PI 39215-1640 August 14, 1986 O. D. KINGSLEY, J R.

VICE PREllOENT NUCLE AR OPERATIONS Mr. James M. Taylor, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Comission Washington, D. C.

20555 Attention:

Document Control Desk

SUBJECT:

Grand Gulf Nuclear Station Unit 1 Docket No. 50-416 License No. NPF-29 Monthly Operating Report AECM-86/0250 In accordance with 10CFR50.36, Mississippi Power & Light Company (MP&L) is providing twelve copies of the Monthly Operating Report for Grand Gulf Nuclear Station Unit 1 for July,1986 (attachment).

If you have any questions or require additional information, please contact this office.

Yours

uly, ODK:vog Attachment cc: Mr. T. H. Cloninger (w/a) l Mr. R. B. McGehee (w/a) l Mr. N. S. Reynolds (w/a) l Mr. H. L. Thomas (w/o)

Mr. R. C. Butcher (w/a) 1 Dr. J. Nelson Grace, Regional Administrator (w/a)

U. S. Nuclear Regulatory Commission l

Region II 101 Marietta St., N. W., Suite 2900 Atlanta, Georgia 30323 Chief (w/2)

Office of Resource Management U. S. Nuclear Regulatory Commission Washington, D. C.

20555 l

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J13AECM86081201 - 1 Member Middle South Utilities System l