ML20205D436

Monthly Operating Rept for May 1986

ML20205D436
Person / Time
Site:	Diablo Canyon
Issue date:	05/31/1986
From:	Keller A, Sisk D, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
DC0455, DC455, NUDOCS 8608180034
Download: ML20205D436 (8)

Text

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MONTHLY NARRATIVE" REPORT

'0F OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and major maintenance experienca for the month of May, 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 arid 2 Technical Specifications.

On May 6,1986 Unit 2 experienced a turbine runback to 20% power due to the failure of stator cooling water pump 2-1. Unit 2 ramped up to and held at 50% power while inspecting condenser water ooxes.

On May 7,1986 Unit 2 returned to 100% power.

On May 7, 1986 An Unusual Event was declared upon issuance of a tsunami warning.

On May 18,1986 Unit 2 reduced power to 70% to allow surveill'nce a testing of main steam isolation valves and retu,rned to 100% power.

On May 19, 1986 Unit 2 reduced power to 50% while plugging leaking main condenser tubes and returned to 100% power.

On May 25, 1986 Unit 2 reduced power to 50% and operated at various power levels between 50% and 95% the rest of the month while attempting to locate leaking main condenser tubes.

Unit 1 operated this month with a unit availability factor of 100 percent and unit capacity factor of 100 percent. During the month of May, Unit I never reduced power below 80 percent power.

Unit 2 operated this month with a unit availability factor of 100 percent a unit capacity factor of 89.3 percent. Before May 25, Unit 2 experienced three power reductions; once for surveillance testing, once to plug leaking main condenser tubes and once as the result of an automatic turbine runback. In addition, Unit 2 operated between May 25 and June 1 at various power levels between 50 percent and 95 percent while searching for an inten.iittent condenser tube leak.

No challenges to the steam generator safety valves or pressurizer power operated relief valves have been made. Major maintenance performed included the replacement of the rotating assembly on Auxiliary Feedwater Pump 2-1 due to a seized thrust bearing. In addition, during the Unit 2 power curtailments (May 25-31) work was begun on modifications to the Unit 2 high Pressure Turbine Pilot Trip Valves.

8608180034 860531 PDR ADOCK 05000275 R PDR g DC0455 7# I k

OPERATING DATA REPORT DOCKET N0. 50-275 DATE 06/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 l i

OPERATING STATUS I

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: May 1986 i

3. Licensed Thermal Power (MWt): 3338

4. Nameplate Rating (Gross MWe): 1137 1

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 744.0 3623.0 9357.3

12. Number Of Hours Reactor Was Critical 744.0 3591.5 8889.8

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 744.0 3566.0 8773.3

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 2490682 11555740 28121190

17. Gross Electrical Energy Generated (MWH) 843800 ~

3865100 E 9432

18. Net Electrical Energy Generated (MWH) 806141 3681232 8915466

19. Unit Service Factor 100.0 98.4 93.8

20. Unit Availability Factor 100.0 98.4 93.8

21. UnitCapacityFactor(UsingMDCNet) 101.0 94.7 88.8

22. Unit Capacity Factor (Using DER Net) 99.8 93.6 87.7

23. Unit Forced Outage Rate 0.0 0.0'- 5.7 4 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 comercial operation on 5-7-85 at 0243.

DC0455

AVERAGE DAILY UNIT POWER LEVEL i

DOCKET F' 50-275 UNIT Diablo Canyon Unit 1 DATE 06/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 l

MONTH May 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 1087 17 1083 2 1091 18 1070 3 1087 19 1084 4 1066 20 1091 5 1091 21 1079 6 1083 22 1095 7 1077 23 1083 8- 1087 24 1087 9 1087 25 1062 10 1087 26 1083 i

11 1074 27 1087 12 1087 28 1083

! 13 1082 29 1083

( 14 1087 30 1083 15 1087 31 1083 1

16 1091 l

i INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the t

reporting month. Compute to the neatest whole megawatt.

l l

l DC0455

l OPERATING DATA REPORT DOCKET N0. 50-323 DATE 06/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS l

1. Unit Name: Diablo Canyon Unit 2

2. Reporting Period: May 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 MWe): 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 744.0 1916.0 1916.0

12. Number Of Hours Reactor Was Critical 744.0 1844.0 1844.0._

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 744.0 1816.8 1816.8

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 2297349 5728876 5728876

17. Gross Electrical Energy Generated (MWH) 750900 1885999 1885999

18. Net Electrical Energy Generated (MWH) 713278 1788596 1788596

19. Unit Service Factor 100.0 94.8 94.8

20. Unit Availability Factor 100.0 94.8 94.8

21. Unit Capacity Factor (Using MDC Net) 89.3 87.0 87.0

22. Unit Capacity Factor (Using DER Net) 85.7 83.4 83.4

23. Unit Forced Cutage Rate 0.0 5.2 5.2

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 of commercial operation)

DC0455

AVERAGE DAILY UNIT POWER LEVEL DOCKET.NO. 50-323 UNIT Diablo Canyon Unit 2 DATE 06/03/86 COMPLETED BY A.T. Keller

TELEPHONE (805)595-7351 MONTH May 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 1082 17 1082 2 1077 18 1037 3 1078 19 864 4 928 20 1081

, 5 1065 21 1077 6 613 22 1078 7 922 23 1080 8 1073 24 1064 9 1082 25 711 10 1082 26 750 11 1049 27 752 j 12 1081 28 703 1 13 1077 29 645 14 1069 30 747

.15 1077 31 616 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.

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DC0455

UNIT SHUTDOWNS Page 1 of 1 DOCKET NO. 50-275 -

UNIT NAME Diablo Canyon Unit 1 DATE 06/03/86 COMPLETED BY D.P. SISK REPORT MONTH MAY 1986 TELEPHONE (805)S95-7351 Method of Licensee Cause & Corrective Duration

. Systea Component i

2 3 Event 4 5 Action to No. Date Type (Hours) Reason Shutdown Report # Code Code Prevent Recurrence None I

i 1 2 3 4 F: Forced Reason: Me thod: Exhibit G - Instructions S: Scheduled A-Equipnent 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 ~

, Page 1 of 1 DOCKET N0. 50-323 .

UNIT NAME. Diablo Canyrn Unit 2 DATE 06/03/86 COMPLETED BY D.P. SISK REPORT MONTH MAY 1986 TELEPHONE (805)595-7351 Licensee Cause & Corrective

. Method of System Component l

Duration 2 3 Event 4 5 Action to No. Date T.ype (Hours) Reason Shutdown Report # Code Code Prevent Recurrence

~

None

.i j

i 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 Fntry 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-0perational Error (Explain) 6,7,8-N/A Exhibit I - Same Source H-0ther (Explain) 9-Other DC0455

l' PACIFIC GAS AND E LE C T RIC C O M PANY pgg , DIABLO CANYON POWER PLANT i P.O. Box 56 Avila Beach, Cahfomia 93424 * (805) 595-7351 R.C. THORN BERRY PLANT MANAGER June 6, 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 May,1986 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon Units 1 and 2 for May, 1986. This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications. In accordance with Section 4.7.13.3 of the_ Units 1 and 2 Technical Specifications, the annual Breakwater Settlement Survey for 1986 is included in this report.

Sincerely, 6? 0 f ROBERT C. THORNBERRY j RCT:lm l

l Enclosures l

l cc Mr. John B. Martin, Regional Administrator l Region V - USNRC l

l l

v i h' DC0455 g/ g(

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