ML20195F806

Monthly Operating Repts for Oct 1998 for Sequoyah Nuclear Plant.With

ML20195F806
Person / Time
Site:	Sequoyah
Issue date:	10/31/1998
From:	Bajestani M, Hollomon T TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9811200089
Download: ML20195F806 (10)

Text

-

., -. ~

s e

Tennessee Valley Authority, Post Office Box 2000, Soddy Daisy, Tennessee 37379-2000 Masoud Bajestani Site Voe President Sequoyah Nuclear Plant November 12, 1998

'U.S.

Nuclear Regulatory Commission ATTN:

Document Control Desk

' Washington, D.C.

20555 Gentlemen:

l In the Matter of

)

Docket Nos.

'50-327 Tennessee Valley Authority

)

50-328

'SEQUOYAH NUCLEAR PLANT (SQN) - OCTOBER MONTHLY OPERATING REPORT The enclosure provides the October Monthly Operating Report as required by SQN Technical Specifications Section 6.9.1.10.

If you have any questions concerning this matter, please call me at (423) 843-7001 or Pedro Salas at (423) 843-7170.

. Sincerely, ff*

Ov f,,y Masoud a,estani Enclosure f

cc:

See page 2 i

f

.I

/

t;;~

i

+-

9811200089 981031 f,

)

ADOCK O M

{M

'i

_. _ ~. _ -

U.S. Nuclear Regulatory Commission Page 2 r

November 12, 1998 JDS:JWP:PMB cc (Enclosure):

Mr. R.-W. Hernan, Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint, North 11565 Rockville Pike Rockville, Maryland 20852-2739 INPO Records Center Institute of Nuclear Power Operations 700 Galleria Parkway Atlanta, Georgia 30339-5947 Ms. Barbara Lewis, Assistant Editor, Database McGraw-Hill, Inc.

1200 G Street, NW, Suite 1100 Washington, D.C.

20005 Mr. James Lang, Manager Advanced Reactor Department Electric Power Research Institute 3340 Hillview Avenue Palo Alto, California 94304 NRC Resident Inspector j

Sequoyah Nuclear Plant 2600 Igou Ferry Road Soddy-Daisy, Tennessee 37379-3624 i

Regional Alministrator U.S.

Nuclear Regulatory Commission Region II Atlanta Federal Center j

61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303-3415 l

- g, r

ENCLOSURE TENNESSEE VALLEY AUTHORITY

.SEQUOYAH NUCLEAR PLANT (SQN) d MONTHLY OPERATING REPORT OCTOBER 1998 UNIT 1 J

DOCKET NUMBER 50-327 LICENSE NUMBER DPR-77 i

UNIT 2 DOCKET NUMBER 50-328 i

LICENSE NUMBER DPR-79

--. -._.-. ~- -

l l

o

(

OPERATIONAL

SUMMARY

l OCTOBER 1998 I.

SEQUOYAH OPERATIONAL

SUMMARY

UNIT 1 Unit 1 generated 612,459 megawatthours (MWh) (gross) electrical power during October with a capacity factor of 70.81 percent.

The Unit 1 Cycle 9 refueling outage continued at the beginning of October Unit 1 was taken critical on October 7, 1998, at 0640 Eastern daylight time (EDT) and was returned to service on October 8 at 0543 EDT.

Unit 1 was removed from the grid on October 8 at 1822 EDT for performance of turbine testing and tied online at 2232 EDT that same day.

Unit 1 reached 100 l

percent power on October 12 and was operating at 100 percent power at the end of October.

UNIT 2 l

Unic 2 generated 829,874 MWh (gross) electrical power during October with a capacity factor of 96.36 percent.

On October 15, 1998, at 0501 EDT, a turbine trip occurred l

followed by a reactor trip.

The event resulted from a generator lockout caused by a failure of a sudden pressure relay on the "B" phase main transformer.

Unit 2 was returned to service on October 16 at 0639 EDT and reached 100 percent power at 1135 EDT on October 17.

Unit 2 was operating at 100 percent at the end of October.

l II.

CHALLENGES TO THE PRESSURIZER POWER-OPERATED RELIEF VALVES (PORVs) OR PRESSURIZER SAFETY VALVES No PORVs or safety valves were challenged in October.

t E-1 1

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-327 UNIT NO.

ONE DATE:

November 9, 1998 COMPLETED BY:

Tanya J. Hollomon TELEPHONE:

(423) 843-7528 l

MONTH:

OCTOBER 1998 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net)

DAY (MWe-Net) l l

1.

0 17.

1135 2.

0 18.

1138 3.

0 19.

1138 4.

0 20.

1140 5.

0 21.

1140 6.

0 22.

1141 7.

0 23.

1143 8.

80 24.

1144 9,

255 25.

1146 10.

671 26.

1144 11.

853 27.

1144 12 1079 28.

1139 13.

1128 29.

1137 14.

1128 30.

1136 15.

1115 31.

1136 16.

1127 E-2

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO.

50-328 UNIT NO.

TWO DATE: November 9, 1998 COMPLETED BY:

Tanya J. Hollomon TELEPHONE:

(423) 843-7528 MONTH:-

OCTOBER 1998 AVERAGE DAILY POWER LEVEL AVERAGE DAILY POWER LEVEL DAY (MWe-Net)

DAY (MWe-Net) 1.

1126 17.

1102 2.

1115 18.

1134 I

3.

1114 19.

1135 4.

1109 20.

1133 5.

1125 21.

1136 6.

1128 22.

1137 7.

1129 23.

1136 8.

1131 24.

1142 9.

1133 25.

1142 10.

1136 26.

1141 11.

1135 27.

1141 12 1131 28.

1137 13.

1125 29.

1134 14.

1132 30.

1136 15.

208 31.

1138 16.

382 E.3

OPERATING DATA REPORT Docket No.

50-327 Date:

November 9,1998 Completed By:

T. J. Hollomon Telephone:

(423) 843-7528 1.

Unit Name:

SQN Unit 1 2.

Reporting Period:

October 1998 3.

Licensed Thermal Power (MWt):

3411.0 4.

Nameplate Rating (Gross Mwe):

1220.6 5.

Design Electrical Rating (Net Mwe):

1148.0 6.

Maximum Dependable Capacity (Gross MWe):

1161 7.

Maximum Dependable Capacity (Net MWe):

1122

~

8.

If changes Occur in Capacity Rating (Item Numbers 3 E: 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: N/A This Month Yr-to-Date Cumulative 11.

Hours in Reporting Period 745 7,296 151,969 12.-

Number of Hours Reactor was Critical 594.3 5 586.6 91,442 13.

Reactor Reserve Shutdown Hours 0.0 0.0 0.0 14.

Hours Generator On-Line 567.1 6,544.9 89,604.5 15.

Unit Reserve Shutdown Hours 0.0 0.0 0.0 16.

Gross Thermal Energy Generated (MWh) 1,793,900.2 21,863,990.2

.193,107,985 17.

Gross Electric Energy Generated (MWh) 612,459 7,540,991 99,942,118 18.

Net Electrical Energy Generated (MWh) 586,299 7,288,679 95,988,576

19.. Unit Service Factor 76.1 89.7 59.0 20.

Unit Availability Factor 76.1 89.7 59.0 21.

Unit Capacity Factor (Using MDC Net) 70.1 89.0 56.3 22.

Unit Capacity Factor (Using DER Net) 68.6 87.0 55.0 23.

Unit Forced Outage Rate' O.0 0.7 28.5 24.

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

' 25.

If Shutdown at End of Report Period, Estimate Date of Startup.

d E-4

OPERATING DATA REPORT 4

Docket No.

50-328 Date:

November 9,1998 j

Completed By:

T. J. Hollomon J

Telephone:

(423) 843-7528 1.

Unit Name:

SQN Unit 2 l

2.

Reporting Period:

October 1998 3.

Licensed Thermal Power (MWt):

3411.0 4.-

Nameplate Rating (Gross Mwe):

1220.6 5.

Design Electrical Rating (Net Mwe):

1148.0 6.

Maximum Dependable Capacity (Gross MWe):

1156 7.

Maximum Dependable Capacity (Net MWe):

1117 8.

If changes Occur in Capacity Rating (! tem Numbers 3 & 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: N/A This Month Yr-to-Date Cumulative 11.

Hours in Reporting Period 745 7,296 143,929 12.

Number of Hours Reactor was Critical 726.5 7,210.4 94,866 13.

Reactor Reserve Shutdown Hours 0.0 0.0 0.0 14.

Hours Generator On-Line -

719.4 7,193.3 92,867.8 15.

Unit Reserve Shutdown Hours 0.0 0.0 0.0 16.

Gross Thermal Energy Generated (MWh) 2,422,529.9 24,440,309.1 298,417,646 17.

Gross Electric Energy Generated (MWh) 829,874 8,377,079 101,602,443 18.

Net Electrical Energy Generated (MWh) 801,994 8,123,207 97,528,569 19.

Unit Service Factor 96.6 98.6 64.5 20.

Unit Availability Factor 96.6 98.6 64.5 21.

Unit Capacity Factor (Using MDC Net) 96.4 99.7 60.7 22.

Unit Capacity Factor (Using DER Net) 93.8 97.0 59.0

'23.

Unit Forced Outage Rate 3.4 1.4 27.6 24.

Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each): N/A 25.

If Shutdown at End of Report Period, Estimate Date of Startup, N/_A E-5

UNIT SHUTDOWNS AND POWER REDUCTIONS REPORT MONTH: OCTOBER 1998 DOCKET NO:

50-327 UNIT NAME:

SQN-1 DATE:

November 9,1998 COMPLETED BY: T. J. Hollomon TELEPHONE:

(423) 843-7528 NY Datel Type' Duration Reason _.

Method of Licensee System Component '

Cause and Corrective Action to Prevent J 2

5 (Hours)?

Shutting L Event Report Codes Code

- Recurrence l "

Downl..

No.

Reactorf 2

981008 S

173.7 C

1 N/A N/A N/A Unit 1 Cycle 9 refueling outage ended on October 8 at 0543 EDT.

3 981008 S

4.2 B

9 N/A N/A N/A Unit I was removed from the grid at 1822 EDT on October 8 for turbine overspeed testing following the refueling outage.

Unit I reactor remained at approximately 30 percent power. Unit I was returned to service at 2232 EDT that same day.

' F: Force 2 Reason:

• Method

' Exhibit G -Instmetions for (NUREG S: Scheduled A-Equipment Failure (Explain) 1-Man tal Preparation of Data Entry sheets B-Maintenance or Test 2-Manual Scram for Licensee Event Report (LER)

C-Refueling 3-Automatic Scram File - NUREG - 1022 D-Regulatory Restriction 4-Continuation of Existing E-Operator Training and License Outage Examination 5-Reduction

' Exhibit I-Same Source F-Administrative 9-Other G-Operational Error (Explain)

H-Other (Explain)

E-6

UNIT SilUTDOWNS AND POWER REDUCTIONS l

REPORT MONTH: OCTOBER 1998

l DOCKET NO

50-328 UNIT NAME:

SQN-2 DATE:

November 9,1998 COMPLETED BY: T. J. Hollomon TELEPHONE:

(423) 843-7528 No.v Date?

Type'; Duration Reason -

Method ofiUJeensee Events Systema -

Counponest Cause and Corrective Action to Pment j 3

^'

.(Hours)k

' Shutting 1 Report No.V Codef Code' - ~

.3 -

Recurrence ?

^

c

~

Down;.

~

Reactdr G l

3

~

2 981015 F

25.6 A

3 50-328/1998002 FK RLY On October 15 at 0501 EDT, a turbine trip i

occurred followed by a reactor trip. The event resulted from a generator lockout caused by a failure of a sudden pressure relay on the "B" phase main transfonner.

The sudden pressure relay was replaced and the relay trip function was disabled from the main transformers and the unit station service transformers. A modification is being evaluated to physically isolate the relays from the vibration of the transformers. Unit 2 was returned to service October 16 at 0639 I

EDT.

8

' F: Force 2 Reason:

Method

' Exhibit G -Instructions for(NUREG S: Scheduled A-Equipment Failure (Explain) 1-Manual Preparation of Data Entry sheets B-htaintenance or Test 2-hfanual Scram for Licensee Event Report (LER)

C-Refueling 3-Automatic Scram File - NUREG - 1022 D-Regulatory Restriction 4-Continuation of Existing E-Operator Training and License Outage 5

Examination 5-Reduction Exhibit I-Same Source F-Administrative 9-Other G-Operational Error (Explain) 11-Other (Explain)

E-7 m

.m m

l V