ML20197D067

Monthly Operating Repts for Feb 1986

ML20197D067
Person / Time
Site:	Diablo Canyon
Issue date:	02/28/1986
From:	Kanick B, Sisk D, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
DC0455, DC455, NUDOCS 8605140117
Download: ML20197D067 (9)

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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 February,1986. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.7 of the Units I and 2 Technical Specifications.

On February 1, 1986 Unit I reduced powar to 44% due to kelp fouling of the

! intake traveling screens.

On February 2, 1986 Unit I returned to 98% power.

On February 6, 1986 A significant event notification was made due to the inadvertent automatic actuation of an Engineered Safety Features System (Unit 2 Fuel Handling Building Ventilation System).

On February 15, 1986 Unit I reduced power to 45% to backflush the main condenser and inspect for leakage, i On February 16, 1986 Unit I returned to 100% power.

On February 19, 1986 Unit 2 was paralleled to the grid at 2335 PST thereby ending the strainer removal outage. Nine minutes later 4

Unit 2 was separated from the grid to investigate a cracking sound coming from the potential transformer 1 cabinets. The noise was apparently caused by arcing in a fuse drawer due to the drawer being only partially latched.

l On February 19, 1986 An Unusual Event was declared on Unit I due to an error in the determination of RWST boron concentration. Unit 1 power was reduced to 65% to comply with a Technical Specification Limiting Condition for Operation on boron concentration before the error was discovered.

On February 20, 1986 Unit 2 was paralleled to the grid.

On February 20, 1986 Unit I returned to 100% power.

On February 21/22,1986 Unit I reduced power to 45% to plug leaking tubes in the main condenser.

On February 22, 1986 Unit I returned to 100% power.

On February 22, 1986 Unit 2 experienced a turbine trip and subsequent reactor trip.

4 On February 25, 1986 Unit 2 paralleled to the grid.

On February 28, 1986 Unit 2 was removed from the grid to correct a turbine digital control system problem, then returned to the grid.

Unit 1 operated this month with a unit availability factor of 100% and a unit capacity factor of 91.7%.

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4 During the month of February, Unit I had to reduce power four times: due to kelp blocking the intake traveling screens; to backflush and inspect main condenser tubes; to plug leaking main condenser tubes; and in response to a Technical Specification Action statement entered due to a chemistry error in the analysis of a RWST sample.

The Unit 2 strainer removal outage ended February 19,1986 at 2335 PST when the Unit was paralleled to the grid. Unit 2 separated from the grid three times after ending the strainer outage: to investigate and correct a noise heard in the metering potential transformer cabinets; as the result of a turbine trip; and to switch to a different electro-hydraulic control mode for the main turbine.

No challenges to the steam generator safety valves or pressurizer power operated relief valves have been made. No major safety-related maintenance was performed on Unit 1, or Unit 2 during the month of February, 1986.

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OPERATING DATA REPORT DOCKET N0. 50-275 DATE 03/03/86 COMPLETED BY Bob Kanick TELEPHONE (805)595-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: February 1986

3. Licensed Thermal Power (MWt): 3338

4. 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 Changas 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 672.0 1416.0 7150.3

12. Number Of Hours Reactor Was Critical 672.0 1416.0 6714.3

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 672.0 1416.0 6623.3

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 2102251 4526520 21091970

17. G oss Electrical Energy Generated (MWH) 695000 1494300 7008632

18. Net Electrical Energy Generated (MWH) 661125 1421314 6655548

19. Unit Service Factor 100.0 100.0 92.6

20. Unit Availability Factor 100.0 100.0 92.6

21. Unit Capacity Factor (Using MDC Net) 91.7 93.5 86.7

22. Unit Capacity Factor (Using DER Net) 90.6 92.4 85.7

23. Unit Forced Outage Rate 0.0 0.0 7.4

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

Refueling Outage, August 30, 1986, 68 days

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 o As of commercial operation on 5-7-85 at 0243.

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OPERATING DATA REPORT DOCKET NO. 50-323 DATE 03/03/86 COMPLETED BY Bob Kanick TELEPHONE (805)595-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 2

2. Reporting Period: February 1986

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 This Month Yr-to-Date Cumulative *

11. Hours In Reporting Period 672.0 1416.0 7297.0

12. Number Of Hours Reactor Was Critical 194.5 439.3 2313.3

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 134.3 349.3 1563.3

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 229168 786924 2908115

17. Gross Electrical Energy Generated (MWH) 66200 242800 875600

18. Net Electrical Energy Generated (MWH) 48034 209537 695725

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 March 1986 o Cumulative totals started on the April 26, 1985 (Date of effectiveness of Low Power License). l 00 These sections not applicable until commencement of commercial operation, 000 These values are predictions - actual values are to be determined by operating experience during the first year of commercial operation.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-275 UNIT Diablo Canyon Unit 1 DATE 03/03/86 COMPLETED BY Bob Kanick TELEPHONE (805)S95-7351 MONTH February 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 489 17 1053 2 817 18 1053 3 1036 19 1043 4 1049 20 1000 5 1061 21 798 6 1061 22 874 7 1066 23 1078 8 1061 24 1057 9 1053 25 1067 10 1062 26 1083 11 1070 27 1083 12 1062 28 1076 13 1062 14 1058 15 856 16 421 INSTRUCTIONS 1 l

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

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

AVERAGE DAILY UNIT POWER LEVEL l

1 DOCKET N0. 50-323  !

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UNIT Diablo Canyon Unit 2 DATE 03/03/86

. COMPLETED BY Bob Kanick ,

3 TELEPHONE (805)595-7351 ,

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j MONTH February 1986 l

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DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL ,

j (MWe-Net) (MWe-Net) 1 1 -6 17 -39 2 -5 18 -38 j 3 -6 19 -38 4 -6 20 180 4 5 -6 21 405 1

1 6 -7 22 572

)

7 -7 23 -38 >

8 -15 24 -39 '

9 -15 25 -39 10 -15 26 319 11 -16 27 554 12 -16 28 446 13 -20 l 14 -27 l 15 -42 i 16 -36 INSTRUCTIONS i

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.

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UNIT SHUTDOWNS .

PAGE 1 0F 1 DOCKET NO. 50-275 UNIT NAME Diablo Canyon Unit 1 DATE 03/04/86 COMPLETED BY D.P. SISK REPORT MONTH FEBRUARY 1986 TELEPHONE (805)595-7351 Licensee ause & Conecdve Duration Method of Event System Component Action to 2 3 4 5 No. Date Type (Hours) Reason Shutdown Report # Code Code Prevent Recurrence None l

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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 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-0ther (Explain) 9-Other DC0455

UNIT SHUTDOWNS PAGE 1 0F 1 DOCKET N0. 50-323 -

UNIT NAME Diablo Canyon Unit 2 DATE 03/04/86 COMPLETED BY D.P. SISK REPORT MONTH FEBRUARY 1986 TELEPHONE (805)595-7351 Method of Licensee System Component Cause & Corrective y Duration ,'

3 Event 4 5 Action to No. Date T_vpe (Hours) Reason' Shutdown Report # Code Code Prevent Recurrence

} 1 02/01/86 5 479.6 B 4 NA NA NA Strainer Removal Outage 2 02/19/86 F 1.8 H 1 NA NA NA Nine minutes after paralleling to the grid, the generator was separated from the system when a cracking sound was heard in the netering potential transformer cabinets. A fuse drawer was found to be not fully latched. The drawer was latched and the unit was j paralleled to the grid with no further problems.

3 02/22/86 F 53.8 A 3 2-86-005 TL RG A voltage transient on the main generator voltage regulator resulted in a turbine trip and subsequent reactor trip. The cause of the voltage transient is being investigated.

l 4 02/28/86 F 2.5 A 1 NA t'J NA Unit 2 was removed from the grid to e correct a turbine digital control problem. The unit was switched to a different electro-hydraulic control mode and returned to the grid.

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 Scrom 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 Exnibit I - Same Source H-Other (Explain) 9-Other DC0455

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PACIFIC GAS AND E LE C T RIC C O M PANY DIABLO CANYON POWER PLANT PO. Box 56 Avila Beach, Cahtornia 93424 - (805) 595-7351 gggggggll R.C. THORNBERRY PLANT MANAGER March 10, 1986 Director, Office of Resource Management 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 February,1986 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon Units 1 and 2 for February,1986. This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.

Sincerely, eeYM ROBERT C. THORNBERRY RCT:lah Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC

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