ML20214L649

Monthly Operating Repts for June 1986

ML20214L649
Person / Time
Site:	Diablo Canyon
Issue date:	06/30/1986
From:	Keller A, Sisk D, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
DC0455, DC455, NUDOCS 8609100309
Download: ML20214L649 (9)

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MONTHLY NARRATIVE REPORT

/ 0F OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and major maintenance experience for the month of June,1986. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.

On June 1, 1986 Unit 1 is operating at 100% power. Unit 2 is operating at 70% power while locating and plugging main condenser saltwater leaks.

On June 2, 1986 Unit 2 power was reduced to 30% while plugging main condenser tubes.

On June 3, 1986 Unit 2 was returned to full power (99.9%).

On June 8, 1986 Unit 1 power was reduced to 55% to plug leaking main condenser tubes and returned to 100% after the tubes were plugged.

On June 10, 1986 Unit 1 power was reduced to 55% to plug leaking main condenser tubes.

On June 10, 1986 Unit 2 power was reduced to secure the number 2 heater drip pump for maintenance testing. Later power was reduced to 57% to locate and plug leaking main condenser tubes. Unit 2 was operated at various power levels from June 10 to June 15 while testing and inspecting the number 2 heater drip pump and while searching for intermittent main condenser tube leaks.

On June 11, 1986 Unit I was returned to full power (99.9%).

On June 14, 1986 Unit 1 power was reduced to 89% to extend the fuel cycle to the scheduled start of the refueling outage.

On June 15, 1986 Unit 2 was returned to full power (98.0%) after the leaking main condenser tubes were plugged and the number 2 heater drip pump was replaced.

On June 19, 1986 Unit 1 power was reduced to 50% power while searching for main condenser tube leaks.

On June 20, 1986 Unit 1 was returned to maximum available power (90%) after the leaking main condenser tubes were plugged.

On June 25, 1986 Unit 1 power was reduced to 49% to search for leaking main condenser tubes.

On June 27, 1986 Unit I was returned to maximum available power (90.4%).

On June 27, 1986 Unit 2 experienced a reactor trip due to circulating water pump failure as further explained in the attached Unit Shutdown Report.

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/ On June 27, 1986 Dies 21 Gen 2rators 1-3 and 2-1 autostarted and loaded on their respective Unit 2 4kV vital busses due to 4 kV vital bus undervoltage when the vital bus potential transformer devices were racked out in error.

On June 27, 1986 Unit 2 experienced a reactor trip signal while performing ,

a functional test on IR channel N-36 due to a procedural step being performed out-of-sequence. The reactor was in Mode 3 at the time.

On June 28, 1986 Unit 2 was synchronized to the PGandE system but the power increase was stopped at 46% due to ongoing repairs of circulating water pump 2-2.

! On June 30, 1986 Unit 1 is operating at maximum available power (89%) during the Unit coast down prior to the first refueling. Unit 2 is operating at 46% power while waiting for repair of the motor for circulating water pump 2-2.

Unit 1 operated this month with a unit availability factor of 100 percent and unit capacity factor of 88.8 percent. Unit I completed 100 days of continuous operation on June 24. During the month of June, Unit I reduced power four times to plug leaking main condenser tubes.

Unit 2 operated this month with a unit availability factor of 92.1 percent and unit capacity factor of 79.3 percent. Unit 2 experienced two power reductions to plug leaking main condenser tubes and operated at various power levels from June 10 to June 15 while testing and inspecting the number 2 Heater Dr'ip Pump and while searching for intermittent main condenser tube leaks. In addition, Unit 2 experienced a reactor trip on June 27 and subsequently received an unrelated reactor trip signal on the same day while the reactor was already shutdown.

No challenges to the steam generator safety valves or pressurizer power operated relief valves have been made. Major maintenance performed included the replacement of Unit 2's heater drip pump. In addition, Unit 2 power was curtailed (June 28-30) while the motor for circulating water pump 2-2 was being repaired.

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OPERATING DATA REPORT DOCKET N0. 50-275 DATE 07/07/86 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: June 1986

3. LicensedThermalPower(MWt): 3338

4. Nameplate Rating (Gross MWe): 1137

5. Design Electrical Rating (Net MWe): 1086

6. MaximumDependableCapacity(GrossMWe): 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 Curulative*

11. Hours In Reporting Period 720.0 4343.0 10077.3

12. Number Of Hours Reactor Was Critical 720.0 4311.5" 960E8-

13. Reactor Reserve Shutdown Hours 0.0__ 0.0 0._0__

14. Hours Generator On-Line 720.0 4286.0 9493.3

15. Unit Reserve Shutdown Hours 0.0 0. f 0.0

16. Gross Thermal Energy Generated (MWH) 2163689 13719424 30284877

17. Gross Electrical Energy Generated (MWH) 722400 4587500 10101832 18 Net Electrical Energy Generated (MWH) 7tT6049 __ I4367281 9601515

19. Unit Service Factor 100.0 98.7 94.2 20 Unit Availability Factor 100.0 98.7 94.2

21. Unit Capacity Factor (Using MDC Net) 8ET 93.7 88.8

22. Unit Capacity Factor (Using DER Net) 87.7 92.C 87.7

23. Unit Forced Outage Rate 0.0 0.0 5 . 3 _.

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

Refueling Outage, September 1, 1986, 63 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

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

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OPERATING DATA REPORT DOCKET NO. 50-323

! DATE 07/07/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 2

2. Reporting Period: June 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): 1124

7. Maximum Dependable Capacity (Net NWe): 1073

8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, Give Reasons:

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 720.0 2636.0 2636.0_

12. Number Of Hours Reactor Was Critical 683.0 2527.0 2527.0

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 663.2 2479.9 2473 T

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) -

2008247- ~ 7737123 _7737123

17. Gross Electrical Energy Generated (MWH) 647700 2533699 2533699

18. Net Electrical Energy Generated (MWH) 612588_ 2402104 '2402104

19. Unit Service Factor 92.1 94.1 94.1

20. Unit Availability Factor 92.1 94.f 94.1

21. Unit Capacity Factor (Using MDC Net) 79.3 84.9 84.9

22. Unit Capacity Factor (Using DER Net) 76.0 8T 4 81.4

23. Unit Forced Outage Rate 7.9 5.9 5.9 ,%

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): N/A

• Year-to-date, and cumulative totals started March 13,1986 at 0300 PST (Date i of commercial operation)

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AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-275 UNIT Diablo Canyon Unit 1 DATE 07/07/86 COMPLETED BY 'A.T. Keller TELEPHONE (805)595-7351 MONTH June 1986 i

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) i i 1 1062 17 946 2 1083 18 847 ,

3 1078 19 958 l 4 1086 20 806 l 5 1083 21 950 l 6 1074 22 942 7 979 23 946 8 657 24 946 9 1033 25 831 10 1000 26 496 11 959 27 931 12 1086 28 942 13 1077 29 936 I 14 1019 30 945 15 958 l

16 929 INSTRUCTIONS On this format list the average daf fy unit power level in MWe-Net for each day in the reporting month. Compute to the nearest whole megawatt.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET N0. 50-323 UNIT Diablo Canyon Unit 2 DATE 07/07/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH June 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 733 17 1082 2 553 18 1077 3 866 19 1077 4 1077 20 1077 .

5 1082 21 1078 6 1077 22 1057 7 1077 23 1077 8 __

1077 24 1078 9 1044 25 1077 10 742 26 1077 11 649 27 236 12 777 28 -36 13 757 29 45 14 684 30 409 15 83,9 16 1077 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

UNIT SHUTDOWNS . .

Page 1 of I DOCKET NO. 50-275 UNIT NAME Diab 1:> Canyon Unit 1 o DATE 07/07/86 COMPLETED BY D.P. SISK REPORT MONTH JUNE 1986 TELEPHONE (805)S95-7351 censee ause A Corrective Duratien Method of System Component Event Action to Tyce l 2 3 4 5 No. Date (Hours) Reason Shutdown Report # Code Code Prevent Recurrence None 1 2 3 4 F: Forced Reascn: Method: Exhibit G - Instructions S: Scheduled A-Equiptent 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-Operaticnal Error (Explain) 6,7,8-N/A Exhibit I - Same Source H-Other (Explain) 9-Other DC0455

UNIT SHUTDOWNS .

Page I cf 1 DOCKET NO. 50-323 -

UNIT NAME Diabl) Ca yon Unit 2 ,

DATE 07/07/86 COMPLETED BY D.P. SISK REPORT MONTH JUNE 1986 TELEPHONE --]805)595-7351

- Method of Licensee System Component Cause & Corrective Dura tion Event Action to ho. l 3 4 5 Date Type (Hours) Reason Shutdown Report # Code Code Prevent Recurrence 1 C6/27/86 F E6.8 A 3 2-86-016 KE M0 Circulating water pump (CWP) 2-2 motor failure caused a 12 kV Bus Undervoltage Reactor Trip. CWP 2-2 is being repaired. To prevent similar occurrences, the other Unit 2 and both Unit 1 CWPs will be inspected during their unit's next available outage of sufficient duration.

1 2 3 4 F: Forced Reason: Method: Exhibit G - Instructions 5: Scheduled A-Equipment Failure (Explain) 1-Mar.ual 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 DCC455

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PACIFIC GAS AND E LE C T RIC C O M PANY DIABLO CANYON POWER PLANT Y PO. Box 56. Avda Beach. Cahfomia 93424 *(805) 595-7351

[lllllllllj m_ _ _ _m R C. THORNBERRY PLANT MANAGER July 8, 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 June,1986 Gentlemen:

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

Sincerely, D7 C [ ~

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

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