ML20154S571

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Monthly Operating Repts for Dec 1985
ML20154S571
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 12/31/1985
From: Kanick B, Thornberry R
PACIFIC GAS & ELECTRIC CO.
To:
NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
DC0455, DC455, NUDOCS 8604010324
Download: ML20154S571 (10)
v • d • e


Text

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. MONTHLY NARRATIVE REPORT OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the. operating and major maintenance experience for the month of December,1985. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.'i of the Units 1 and 2 Technical Specifications.

On December 1, 1985 Unit 2 experienced a reactor trip On December 1,-1985 Unit 2 was paralleled to the grid On December 2, 1985 Unit I was separated from the grid due to marine fouling of the ocean intake structure On December 2, 1985 Unit 2 was tripped manually while shutting down to clean marine fouling of the ocean intake structure On December 5, 1985 Unit 2 experienced a reactor trip t

On December 6, 1985 Unit 2 was paralleled to the grid On December 9, 1985 Unit I was paralleled to the grid On December 13, 1985 Unit 2 reduced power and separated from the grid to facilitate repairs to the main condenser On December 15, 1985 Unit 2 was paralleled to the grid On December 19, 1985 Unit 2 reduced power to 50% due to main condenser saltwater leakage On December 21, 1985 Unit 2 experienced a reactor trip On December 22, 1985 Unit 2 was paralleled to the grid On - December 25, 1985 Unit 2 experienced a reactor trip On Dece.nber 26, 1985 Unit 2 was paralleled to the grid On December 28, 1985 Unit 2 reduced power and separated from the grid due to main condenser saltwater leakage On December 30, 1985 Unit 2 was paralleled to the grid On December 31, 1985 Unit 2 was separated from the grid during the performance of startup testing Unit 1 operated this month with a unit availability factor of 79.8% and a unit capacity factor of 76.3%.

During the month of December, an ocean storm resulted in the repair and/or replacement of the traveling screens in the ocean intake structure. Reactor l coolant pump motor 1-3 exhibited excessive vibration. The reactor was shutdown and vibration corrected by rebalancing the motor.

No challenges to the PORVs or steam generator safety valves have been made.

8604010324 851231 PDR ADOCK 05000275 R N DC0455

AVERAGE DAILY UNIT POWER LEVEL DOCKET N0. 50-275 UNIT Diablo Canyon Unit 1 DATE 01/13/86 COMPLETED BY Bob Kanick TELEPHONE (805)S95-7351 MONTH December 1985 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 1041 ___

17 1070 2 949 18 1077 3 -19 19 ,

1058 4 -20 20 1069 5 -31 21 1065 6 -37 22 1059 7 -32 23 1066 8 -35 24 1067 9 185 25 1066 10 1024 26 1065 11 1074 27 1066 12 1070 28 1066 13 1061 29 1050 14 1070 30 1057 15 1048 31 1065 16 1069 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.

DC0455 t.

AVERAGE DAILY UNIT POWER LEVEL DOCKET N0. 50-323 UNIT Diablo Canyon Unit 2 DATE 01/13/86 COMPLETED BY Bob Kanick TELEPHONE (805)S95-7351 MONTH December 1985 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Met) (MWe-Net) 1 157 17 841 2 504 18 944 3 -21 19 ___

599 4 -32 20 812 5 -37 21 241 6 -42 22 148 7 326 23 919 8 276 24 532 9 783 25 /

10 410 26 207 11 707 27 451 12 968 28 288 13 739 29 -41 14 -38 30 121 15 120 31 46 16 226 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.

DC0455

OPERATING DATA REPORT DOCKET NO. 50-275' DATE 01/13/86 COMPLETED BY Bob Kanick TELEPHONE (805)595-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 1
2. Reporting Period: December 1985
3. Licensed . Thermal Power (MWt): 3338 14 . Nameplate Rating (Gross MWe): 1137
5. Design Electrical Rating (Net MWe): 1086
6. Maximum Dependable Capacity (Gross MWe): 1125**
7. ~ Maximum Dependable Capacity (Net MWe): 1073**
8. 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: None This Month Yr-to-Date Cumulative
11. Hours In Reporting Period 744 5734.3 5734.3*
12. Number Of Hours Reactor Was Critical 639.5 5298.3 5298.3*
13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
14. hours Generator On-Line 593.5 5207.3 5207.3*
15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
16. Gross Thermal Energy Generated (MWH) 1929994 16565450 T6565450
17. . Gross' Electrical Energy Generated (MWH) 643900 5514332 5514332
18. Net Electrical Energy Generated (MWH) 609144 5234234 5234234
19. Unit Service Factor 79.8 90.8 90.8
20. Unit Availability Factor 79.8 90.8 90.8
21. Unit Capacity Factor (Using MDC Net)- 76.3 85.1 85.1 22., Unit Capacity Factor (Using DER Net) 15.4 84.1 84.1
23. Unit Forced Outage Rate 20.2 9.2 9.2

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

25. If Shut Down At End Of Report Period, Est. Date of Start-up: N/A

'26. Units In Test Status (Prior to Commercial Operation): N/A  !

  • As of commercial operation on 5-7-85 at 0243.
    • These values are predictions - actual values are to be determinta by operating experience during the first year of commercial operation.

DC0455

~

r OPERATING DATA REPORT DOCKET N0. 50-323 DATE 01/13/86 COMPLETED BY Bob Kanick TELEPHONE (805)595-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 2
2. Reporting Period: December 1985
3. Licensed Thermal Power (MWt): 3411

, 4. Nameplate Rating (Gross MWe): 1164

5. Design Electrical Rating (Net MWe): 1119
6. Maximum Dependable Capacity (Gross MWe): 1145***
7. Maximum Dependable Capacity (Net MWe): 1093***
8. 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: None lhis Month Yr-to-Date Cumulative
11. Hours In Reporting Period 744 5881 5881*
12. Number Of Hours Reactor Was Critical 572.8 1874 1874*
13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0
14. Hours Generator On-Line 488.3' 1214 1214*
15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
16. Gross Thermal Energy Generated (MWH) 971006 2121190 2121190*
17. Gross Electri:al Energy Generated (MWH) 300400 632800 632800*
18. Net Electrical Energy Generated (MWH) 267830 485988 485988*
19. Unit Service Factor N/A**
20. Unit Availability Factor N/A**
21. Unit Capacity Factor (Using MDC Net) N/A**
22. Unit Capacity Factor (Using DER Net) N/A**
23. Unit Forced Outage Rate N/A**
24. Shutdowns Scheduled Over Next 6 Months (Type Date, and Duration of Each):

N/A

25. If Shut Down At End Of Report Period, Est. Date of Start-up: N/A
26. Units In Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY July 1985 August 1985

! INITIAL ELECTRICITY October 1985 October 1985 COMMERCIAL OPERATION January 1986 ___

i

  • Cumulative totals started on the April 26, 1985 (Date of effectiveness of Low Power License).
    • These sections not applicable until commencement of commercial operation.
      • These values are predictions - actual values are to be determined by operating experience during the first year of commercial operation.

DC0455

UNIT SHUTDOWNS AND POWER REDUCTIONS T' Paga 1 of I DQCKETNO. 50-275 UNIT NAME Diablo Canyrn Unit 1 ..<

DATE 01/13/86 ..

COMPLETED BY W.J. KELLY REPORT MONTH DECEMBER 1985 TELEPHONE (805)595-7351 i

! Method of .

Licensee

. System . Component Cause 8 Corrective Duration Action to 2

Event l 3 4 5 No. Date Type (Hours) Reason Shutdown . Report # Code Code Prevent Recurrence 1 12/02/85 F 150.5 B 1 -. NA NA Unit was shutdown to clean marine

' debris from the circulating water-system ocean intake structure.

1 2 3 4- -

F: Forced Reason: Method: Exhibit G - Instructions S: Scheduled A-Equipment Failure (Explain) 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.

D-Regulatory Restriction 4-Continuation from (NUREG-1022)

E-Operator Training & License Examination previous month F-Administrative .

5-Power reduction 5 G-Operational Error (Explain) 6,7,8-N/A Exhibit I'- Same Source

. H-Other (Explain). 9-Other-DC0455-

UNIT SHUTDOWNS AND POWER REDUCTIONS Page 1 of 3 DOCKET NO. 50-323 UNIT NAME Diablo Canyon Unit 2 ..

DATE 01/13/86 .

COMPLETED BY W.J. KELLY REPORT MONTH DECEMBER 1985 TELEPHONE (805)595-7351 Licensee Cause & Corrective Duration Method of System Component 2 3 Event 4 5 Action to No. Date Type l (Hours) Reason Shutdown Report # Code Code Prevent Recurrence 1 12/01/85 F 13.1 A 3 2-85-016 NA NA During the 50 percent . load rejection test, a turbine trip and subsequent reactor trip occurred due to hi-hi steam generator level, caused by a.

failure of the automatic feedwater control system to maintain proper steam -

generator water levels during transient. Feedwater control systems have been adjusted to provide for proper response to this transient.

2 12/02/85 f 98.3 8 2 2-85-018 IU LI While reducing power due to marine fouling of the ocean intake structure, a failure of the digital rod position indication system prompted operators to manually trip the unit from 20 percent power. Cause of DRPI failure has not been determined.

3 12/13/85 S 42.9 B 1 --

NA NA Unit shutdown to repair condenser tube leaks.

I 2 3 4 F: Forced Reason: Method: Exhibit G - Instruc'tions 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 D-Regulatory Restriction 4-Continuation from (NUREG-1022)

E-Operator Training & License Examination previous month F-Administrative 5-Power reduction 5 G-Operational Error (Explain) 6,7,8-N/A Exhibit I - Same Source H-Other(Explain) 9-Other DC0455

UNIT SHUTDOWNS AND POWER REDUCTIONS Page 2 of 3 DOCKET N0. 50-323 ,

UNIT NAME -Diablo Canyon Unit 2 .

DATE 01/13/86 .

COMPLETED BY W.J. KELLY REPORT MONTH DECEMBER 1985 TELEPHONE (805)S95-7351 ,

Licensee ause & Conective

. System Component Duration Action to

}

2 Methodof Event l 4 5 No. Date Type (Hours) Reason Shutdown Report # Code Code Prevent Recurrence

{

i 1 4 12/21/85 F 21.3 A 3 2-85-022 SJ FCV While in Mode 1, automatic turbine and and reactor trips' occurred from low steam generator water level signal coincident with steamflow feedflow 3 mismatch signal, caused by the 2-2 i steam generator feedwater regulating l valve closing when construction j personnel bumped a junction box causing

an improperly terminated wiring

] connection to momentarily open. The

! wiring connection was properly i terminated.

5 12/25/85 F 29.9 8 3 2-85-024 NA NA While in Mode 1 and performing large load rejection testing, reactor and turbine trips occurred due to low-low 1 steam generator water level resulting

.j from the slow response time of the j steam dump control system, which was i subsequently modified to improve the steam dump valve response time.

i i

j 1 2 3 4

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

D-Regulatory Restriction 4-Continuation from (NUREG-1022)
E-Operator Training & License Examination previous month F-Administrative 5-Power reduction 5 j G-Operational Error (Explain) 6,7,8-N/A Exhibit I - Same Source H-0ther (Explain) 9-Other l

DC0455

o UNIT-SHUTDOWNS AND POWER REDUCTIONS- *

~ Page :3 of 3. DOCKET NO.- ~ 50-323 '

UNIT NAME Diablo Canyon Unit 2 i s ,-

DATE, 01/13/86 ,

COMPLETED BY W.J. KELLY REPORT MONTH DECEMBER 1985 TELEPHONE -(805)595-7351

. Licensee System . Component Cause & Corrective Duration 2 Methodof Event 4 5 Action to-No. Date Type l (Hours) Reason Shutdown Report.# Code Code Prevent Recurrence 6 12/28/85 S 36.2 B 1 NA NA NA Unit shutdown to repair condenser tube-.

leaks.

7 12/31/85 S 14.0 8 2 NA NA NA Turbine tripped as part of Startup

~ Testing.

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 D-Regulatory Restriction 4-Continuation from

~

(NUREG-1022)

E-Operator Training & License Examination previous month F-Administrative 5-Power reduction 5 G-Operational Error (Explain) 6,7,8-N/A Exhibit I - Same Source H-Other(Explain) Other DC0455

PACIFIC GAS AND ELECTR,IC C O M PANY DIABLO CANYON POWER PLANT Y PO. Box 56 Avi!a Beach, Cahfornia 93424 -(805) 595-7351 (gllllllll R.C. THORNJERRY PLANT MANAGER January 13, 1986 Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, DC 20555 RE: Docket No. 50-275 and 50-323 License No. DPR-80 and DPR-82 Monthly Operating Report for December,1985 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon

~ Units 1 and 2 for December, 1985. This report is submitted in accordance .vith Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.

Sincerely, f 0, -

ROBERT C. THORNBERRY RCT:lah Enclosu,res cc Mr. John B. Martin, Regional Administrator Region V - USNRC r

F l

i i l

DC0455

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