ML19343B232

Monthly Operating Rept for Nov 1980

ML19343B232
Person / Time
Site:	Sequoyah
Issue date:	12/03/1980
From:	Dupree D TENNESSEE VALLEY AUTHORITY
To:
Shared Package
ML19343B231	List: ML19343B230 ML19343B232
References
NUDOCS 8012160333
Download: ML19343B232 (14)

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TENNESSEE VALLEY AUTHORITY DIVISION OF NUCLEAR POWER

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SEQUOYAH NUCLEAR PLANT

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MONTHLY OPERATING REPORT NOVEMBER I - NOVEMBER 31, 1980 DOCKET NUMBER 50-327 LICENSE NL?fBER DPR-77 t

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Submitted By: ~ Aa t hi till-Plantpanager i,

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1 TABLE OF CONTENTS Operations Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Significant Operational Events . . . . . . . . . . . . . . . . . . . . . 2-6 Average Daily Unit Power Level . . . . . . . . . . . . . . . . . . . . . 7 Operating Data Report . . . . ...,... . . . . . . . . . . . . . . . 8

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l Unit Shutdown and Power Reduction ... , , . . . . . . . . . . . . . . 9-10

• 1 Plant Maintenance Summary . . . . . . . . . . . . . . . . . . . . . . . 11 Outage Maintenance Summary . . . . . . . . . . . . . . . . . . . . . . . 12

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1 Operations Summary November, 1980 The following summary describes the significant operational activities for the month of November. In support of this summary, a chronological log of significant events is included in this report.

There were nineteen Licensee Event Reports and no Special Reports.

There were eleven reactor trips during November.

November 1, Unit I was at 30% power, producing 280 megawatts. The reactor was placed in mode 45 twice during the scath for maintenance.

A power operated relief valve opened during a reactor trip on November 29.

Reactor ausber oce reached 751 (860 segawatts) and was at this power level at the end of the month.

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Significant Operational Events.

Date Time Event 11/04/80 0358 Turbine load raised from 4%~to 29.7% per SU-8.1.

0540 Dropped turbine and Rx power 5% at 1%/ min per SU-8.1.

0620 Raised power fra 22.7 to 32.7 at 1%/ min.

0728 Started load reduction.

0740 Turbine stopped at 22.7%.

0807 Turbine set up on a 51/ sin increase.

0810 Start turbine increase to 27.7%.

1100 Turbine test completed (SU-8.1).

-11/05/80- 1202 Started a 10*. load reduction free 33% at 200*./ min.

1203 Test complete at 23%.

226 Turbine load increase from 23% at 2007/

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1227 Test cceplete.

1255 Turbine powr reduced to 29% at 1%/etc.

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1525 Rm at W.. tartime lead at 2R KC W.

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Significant Operational Events 2

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Date Time Event 11/10/80 1358 -Start pulling shutdown banks.

1417 All S/D-rods full out.

1744 Mode #3.

2200 Heat up 435'F.

11/11/80 0600 RCS 546.8'F.

0853 All S/D banks rod withdrawn.

0843 Pulling control banks.

l 0856 Rx critical

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) 0951 Rx at 5%.

4 1100 Rolling main turbine.

1423 Rx trip.

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1512 Closed Rx trip breakers.

1639 Start pulling S/D banks.

2000 All shutdown rods fully withdrawn.

2001 Start pulling control rods.

2022 Rx critical.

11/12/80 0333 Rx trip.

1704 Began pulling shutdown banks.

1720 Banks fully withdrawn.

2200 Mode #3 544*F.

11/13/80 0124 Ex critical.

11/14/80 0036 Rx trip.

0253 S/D banks withdrawn.

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t Significant Operational Events (Continued)

Date Time Event 1025 Started cooldova of RCS.

1400 RCS at 577'F.

i 1532 Mode #4.

11/15/80 0029 Inserting shutdown rods.

0053 Rods in.

0503 Mode #5.

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11/16/80 0600 Mode #5.

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1700 Began heating up to Mode #4.

t 1746 Mode #4.

2116 Began pulling shutdown banks.

2131 Banks withdrawn.

2323 Mode #3.

11/17/80 1130 All shutdown rods out.

1148 Start pulling control rods.

1201 RA critical.

2200 Rx at 50%/525 MWE.

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11/20/80 1628 Start pulling S/D bank A.

11/21/80 0258 Stopped MFPT "A". H.P. valves still open.

Pump could not be controlled. The valve was swinging from 0% to 50%.

0615 Mode #2.

0935 Mode #1.

1105 Rx trip HiHi S/G 1evel.

I 1234 Began pulling S/D banks.

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Significant Operational Events (Continued)

Date Time Event

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1253 Shutdown bank withdrawn fully.

1303 Began pulling control bank A.

1319 Rx critical.

11/22/80 0801 Rx trip, Hi flux trip.

, 0846 Began pulling shutdown banks.

0901 Bank A,B,C,D fully withdrawn.

0912 Began pulling control banks.

1416 Began pulling shutdown rods.

1431 Banks A,B,C,D fully withdrawn. ,

1501 Rx critical.

2248 Rx trip, rate trip.

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11/23/80 0100 Pulling S/D rods.

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0123 Shutdown rods out.

0128 Start pulling control rods.

0138 Reset main turbine.

0149 Rx critical, Tavg 549.

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0329 Generator tied on line.

i 0522 Rx trip at 30%.

0707 Began pulling S/D rods.

0722 Banks A,B,C,D fully withdrawn.

0810 Began pulling control banks.

1235 Rx trip (test and blackout) 1241 SIS actuated, Hi steam flow.

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Significant Operational Events

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Date Time Event 1400 Mode #3.

11/24/80 0610 Tavg 547'; S/D banks in; RCS pressure 2235.

1646 Start pulling shutdown banks.

2235 Started cooldown.

11/25/80 0330 Mode #4.

11/27/80 1400 Mode #4, heating up. ,

2735 Heat up stopped, repair annunciator on S/G level.

2139 Restarted heat-up.

2205 Mode #3.

11/28/80 6121 Pulling S/D rods.

0141 S/D rods fully out.

1143 Start pulling control rods.

1200 Rx critical.

1428 Turbine tied to grid.

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11/29/80 1212 Out on AI due to turbine load, load dropped to 65%.

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1236 Rx at 70%; 800 mw.

1257 AI back in limits; 46 minute penalty.

1300 Rx at 75%; 860 MW; 569*F.

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AVERAGE DAILY UNIT POWER LEVEL

DOCKET NO. 50-327 UNIT one DATE 12-3-80 __

I COMPLETED BY David Dunree

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MONTH November DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 16905 17 '3325 2 4741 18 12412

3 6162 19 12405

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4 6580 20 7528

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l 5 4805 21 4716 6 0 22 981 7 0 23 2 8 0 24 0

.9 0 25 0 10- 0 26 0 11 0 27 0 12 490 28 2569 13 6033 29 891 14 170 30 1608 15 0 31 N/A 16 0 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.

(9/77) 7

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OPERATING DATA REPORT i

DOCKET NO. 50-327 DATE 12-4-80 COMPLETED BY David Dupree TELEPHONE (615) 842-0295

OPERATING STATUS

1. Unit Name: Sequoyah one Notes

2. Reporting Period

, November. 1980 j 3. Licensed Thermal Power (MWt): 3411

4. Nameplate Rating (Gross MWe): 1220.5

5. Design Electrical Rating (Net MWe): 1148

6. Maximum Dependable Capacity (Gross MWe): 1185

7. Maximum Dependable Capacity (New MWe): 114g

8. If 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 (New MWe):

l 10. Reasons For Restrictions, If Any:

i This Month Yr-to-Date Cumulative

11. Hobrs in Reporting Period 720 6601 6601

12. Number of Hours Reactor Was Critical 330.517 1016.1 1016.1

13. Reactor Reserve Shutdown Hours 0 0 0 1 14. Hours Generator On-Line 330.78 337.09 337.09

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWH) J104,781.3 8.591.11 467.260.4 467.260.4

17. Gross Electrical Energy Generated (MWH) 109,500.3 109,500.3

18. Net Electrical Energy Generated (MWH) 92.324.10 92.324.10 92.324.10

19. Unit Service Factor M/A M/A M/A

20. Unit Availability Factor N/A N/A N/A

21. Unit Capacity Factor (Using MDC Net) N/A N/A N/A

22. Unit Capacity Factor (Using DER Net) N/A N/A N/A

23. Unit Forced Outage Rate N/A N/A N/A

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

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

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

Forecast Achieved INITIAL CRITICALITY 7-04-80 7-05-80 INITIAL ELECTRICITY -

8-21-80 7-22-80 COMMERCIAL OPERATION 12-30-86 (9/77) 8

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UNIT SHUTDOWNS AND POWER REDUCTIONS DOCKET NO. 50-327 1

UNIT NAME Seouoyah One

• DATE 12-4-80 l COMPLETED BY navid Dunree REPORT MON'lli November TELEPHONE (615) 842-0295

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Q e ,, m oa3 Licensee U Cause & Corrective No. Date 't jl $ @ v fi % Event $ 't $"k Action to

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Prevent Recurrence

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P 15 11-5-80 F 136 Hrs H 3 An injection pressure surge on main feedwater 56 Min system caused reactor trip.

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16- 11-11-80 F 7 lirs A 3 Vital inverter voltage spikes caused indicated i low level in #2 S/G causing reactor trip.

g, 17 11-12-80 F 22 Hrs A 3 Main turbine generator back-up relay system -

51 Mir problem caused reactor trip. .

18 11-14-80 F 84 lirs A 3 Reactor trip caused by containment spray systen 7 Mir being inoperable. 4 19 11-20-80 F 12 Hrs A 3 Low level in S/G #3 caused reactor trip.  !

45 Mir

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20 11-21-80 F 18 Hrs A.H 3 Swinging of MFPT controls caused High S/G 40 Mir level resulting in a reactor trip.

21 11-22-80 F 1 lir H 3 Instrumentation personnel installing test 24 Mir equipment in the NIS cabinets caused reactor trip.

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1 2 3 4 F: Forced Reason: Method: Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data

, B-Maintenance or Test 2-Manual Scram. Entry Sheets for Licensee

• C-Refueling 3-Automatic Scram. Event Report (LER) File (NUREG- '

D-Regulatory Restriction 4-Other (Explain) 0161)

E-Operator Training & License Examination F-Administrative G-Operational Error (Explain) 5 (9/77) H-Other (Explain) Exhibit I-Same Source l

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UNIT SHUTDOWNS AND POWER REDUCTIONS DCCKET NO. 50-327 UNIT NAME g .

DATE 8 COMPLETED BY David Dupree REPORT MONT!! November TELEPHONE (615) 842-0295

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1 em a o ao S Licensee 5 Cause & Corrective I No. Date  % 3$ @ .a 3 g Event $1 $$ Action to yy y jgj Report # %3 3 Prevent Recurrence j

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l 22 11-22-80 F 6 Hrs H 3 Instrumentation personnel installing test 20 Min equipment in the NIS cabinets caused reactor trip.

- 23 11-22-80 F 4 Hrs H 3 A planned negative rate trip per startup test o 12 Min SU-9.5 caused two rods to drop and the trip.

24 11-23-80 F 5 Hrs 11 3 Trip caused by startup test SU-1.2A to verify the reactor can be shutdown outside the Control room.

25 11-23-80 F 119 Hrs H 3 Reactor tripped caused by startup test SU-1.lA 54 Min to prove reactor can be shutdown normally without offsite power (blackout).

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i 1 2 3 4 F: Forced Reason: Method: Exhibit G-Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Data B-Maintenance or Test 2-Manual Scram. Entry Sheets for Licensee i C-Refueling 3-Automatic Scram. Event Report (LER) File (NUREG-D-Regulatory Restriction 4-Other (Explain) 0161)

E-Operator Training & License Examination

! F-Administrative I

G-Operational Error-(Explain) 5 l (9/77) H-Other (Explain) Exhibit I-Same Source 4

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Plant Maintenance Summary The following significant maintenance items were completed during the month of November, 1980:

1. Repairs were made to the IC main condensor tubes which were damaged when the cap blew off of the end of the stea:n dump header during steam dump operation. (This was due to water hammer).

2. The main feed pump turbine condensor flexible joint between the condensor and the turbine was found to be leaking air in. The joint was tightened and air-leakage to the main condensor was reduced significantly.

3. The Unit i vital inverters were tested and various problems corrected including voltage spikes caused by a faulty sync. signal. This faulty signal caused the vital inverter 2-III to trip initiating a safety injection.

4. Centrifugal charging pump 2B-B was disassembled, inspected for damage and repairs initiated.

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Outage Maintenance Summary i.

Continued to work on pipe hangers en safety related systems in accordance with IE Bulletin 79-14.

Work continued on the installation of high density storage racks in the spent fuel pit.

Continue to repair containment isolation valves on Unit 2 that failed the TVA-2C preoperational leak rate test.

Modification began on the waste disposal system which would allow for opera-tion of a portable demineralizer system.

4 Work began on the replacement of the Unit 2 vital inverters.

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