ML20212C669

Monthly Operating Repts for Aug 1986

ML20212C669
Person / Time
Site:	Diablo Canyon
Issue date:	08/31/1986
From:	Keller A, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8612310131
Download: ML20212C669 (8)

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 August,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 August 1, 1986 Unit I started the month at 61% power while coasting down for its first refueling outage. Unit 2 started the month at 75% power while investigating a saltwater leak in the main condenser.

On August 2, 1986 Unit 2 returned to 100% power.

On August 3/4,1986 Unit 2 reduced power to 50% power while plugging leaking condenser tubes and returned to 100% power.

On August 9, 1986 Unit 2 reduced power to 35% power for scheduled demusseling.

On August 11, 1986 Unit 2 returned to 100% power.

On August 29, 1986 Unit 1 experienced a reactor trip due to a loose connection that was disturbed during a shunt trip functional test of a reactor trip breaker. Since the trip occurred within eight hours of the scheduled shutdown for the first refueling outage, there was no attempt to restart the reactor.

On August 31, 1986 Unit 1 ended the month shutdown for refueling. Unit 2 ended the month at 100% power.

Unit 1 operated this month with a unit availability factor of 92.1% and a unit capacity factor of 48.6%. On August 29, Unit 1 experienced a reactor trip and commenced its first refueling outage after a record setting run of 165 days continuously synchronized to the PGandE system.

Unit 2 operated this month with a unit availability factor of 100% and a unit capacity factor of 94.9%. Unit 2 reduced power twice this month, once to plug leaking main condenser tubes and once for demusseling.

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 either unit this month.

I h' 8612310131 860031 \ll}

PDR ADOCK 05000275 R PDR DC0455 -131-

I-OPERATING DATA REPORT DOCKET NO. 50-275 DATE 09/02/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: August 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 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 5831.0 11565.3

12. Number Of Hours Reactor Was Critical 684.9 5740.4 11038.7

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 684.9 5714.9 10922.2

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 1366070 16927830 33493283

17. Gross Electrical Energy Generated (MWH) 422900 5608200 11122532

18. Net Electrical Energy Generated (MWH) 387965 5316223 10550457

19. Unit Service Factor 92.1 98.0 94.4

20. Unit Availability Factor 92.1 98.0 94.4

21. Unit Capacity Factor (Using MDC Net) 48.6 85.0 85.0

22. Unit Capacity Factor (Using DER Net) 48.0 84.0 84.0

23. Unit Forced Outage Rate 0.0 0.0 4.6

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: November 7, 1986

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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r OPERATING DATA REPORT DOCKET N0. 50-323 DATE 09/02/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 2

2. Reporting Period: August 1986

3. Licensed Thermal Power (MWt): 3411

4. NameplateRating(GrossMWe): 1164

5. Design Electrical Rating (Net MWe): 1119

6. Maximum Dependable Capacity (Gross MWe): 1130

7. Maximum Dependable Capacity (Net MWe): 1079

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

Items 6 and 7 have been changed to agree with MDCs being used by the California Public Utilities Commission

9. Power Level To Which Restricted, If Any (Net MWe): N/A Reasons For Restrictions, If Any:

10. None This Month Yr-to-Date* Cumulative * .

11. Hours In Reporting Period 744.0 4124.0 4124.0

12. Number Of Hours Reactor Was Critical 744.0 3964.5 3964.5

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 744.0 3861.4 3861.4

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 2414317 11934004 11934004

17. Gross Electrical Energy Generated (MWH) 801700 3901899 3901899

18. Net Electrical Energy Generated (MWH) 762134 , 3695371 3695371

19. Unit Service Factor 100.0 93.6 93.6

20. Unit Availability Factor 100.0 93.6 93.6

21. Unit Capacity Factor (Using MDC Net) 94.9 83.0 83.0

22. Unit Capacity Factor (Using CER Net) 91.5 80.1 80.1

23. Unit Forced Outage Rate 0.0 6.4 6.4

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 -134-

AVERAGE DAILY UNIT POWER LEVEL DOCKET N0. 50-275 UNIT Diablo Canyon Unit 1 DATE 09/02/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH August 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (NE-int) (NE-NET) 1 597 17 553 2 671 18 552 3 651 19 544 l 4 639 20 524 5 602 21 523 6 614 22 523 7 614 23 519 8 618 24 520 9 610 25 498

! 10 614 26 477

^

11 614 27 483 12 614 28 482

( 13 607 29 237

! 14 581 30 -38 15 581 31 -34

, 16 573 INSTRUCTIONS 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.

l i

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7 AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-323 UNIT _Diablo Canyon Unit 2 DATE 09/02/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH August 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWE-NET) (MWE-NET) 1 753 17 1042 2 1022 18 1083 3 1026 19 1079 4 754 20 1092 5 1075 21 1076 6 1088 22 1080 7 1100 23 1083 8 1080 24 1022 9 1022 25 1080 10 316 26 1083 11 1093 27 1083 12 1043 28 1083 13 1075 29 1075 14 1087 30 1075 15 1084 31 1017 16 1084 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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UNIT SHUTDOWNS PAGE 1 0F 1 DOCKET NO. 50-275 UNIT NAME Diablo Canyon Unit 1 DATE 09/02/86 COMPLETED BY D.P. SISK REPORT MONTH AUGUST 1986 TELEPHONE (805)S95-7351 Method of Licensee Cause & Corrective Duration System Component 2 3 Event 4

Action to No. Date Type 1 (Hours) Reason Shutdown Report # Code Code 5

Prevent Recurrence 1 8/29/86 F 59.1* H 3 1-86-010 JC CON The reactor tripped while technicians were connecting meter test leads for testing the shunt trip function on a reactor trip breaker. This event was caused by loose connections on a relay in the reactor trip breaker cubicle, that were disturbed by the technician. The loose connections found as a result of this event were tightened. To prevent recurrence, similar connections on the other reactor trip breakers are being inspected for tightness and a sample of connections on other similar relays is being inspected to assure that the problem is not generic.

O Since this reactor trip occurred within eight hours of the scheduled shutdown for this unit's first refueling outage, there was no attempt to restart the reactor.

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) 9-Other DC0455 -137-

UNIT SHUTDOWNS .

PME 10F 1 DOCKET N0. 50-323 -

UNIT NAME Diabb Cany n Unit 2 DATE 09/02/86 COMPLETED BY D.P. SISK REPORT MONTH AUGUST 1986 TELEPHONE (805)595-7351 l

- Method of Licensee System Component Cause & Corrective l

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

I l \

l l l

l 1 2 3 4 F: Forced Reason: Method: Exhibit G - Instructions S: Scheduled A-Equipment Failure (Explain) 1-Manual for Preparation of Cata B-Maintenance or Test 2-Manual Scram Entry Sheets for Licensee C-Refueling 3-Automatic Scram Event Report (LER) File i 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-Other(Explain) 9-Other DC0455 -138-

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! PACIFIC GAS AND E LE C T RI C C O M PANY DIABLO CANYON POWER PLANT PO. Box 56 Avila Beach. Cahfornia 93424 = (805) 595-7351 lggggllll 7 - -;

R.C. THORNBERRY WANT MANAGER September 9, 1986 b

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 August,1986 Gentlemen:

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

Sincerely,

/

f$

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

DC0455

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