ML20207F754

Monthly Operating Repts for Sept 1986

ML20207F754
Person / Time
Site:	Diablo Canyon
Issue date:	09/30/1986
From:	Keller A, Sisk D, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8701060219
Download: ML20207F754 (9)

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 September, 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 September 1, 1986 Unit I started the month shutdown for its first refueling outage. Unit 2 started the month at 100% power.

On September 6, 1986 Unit 2 reduced power to 70% for Main Steam Isolation Valve part-stroke testing and returned to 100% power.

On September 8, 1986 Unit 1 experienced a loss of decay heat removal capability when a voltage transient in the solid state protection system caused one of the RHR suction valves to close.

On September 14, 1986 Unit 2 reduced power to 50% to plug leaking main condenser tubes.

On September 15, 1986 While preparing to inc'rease power to 100% after plugging leaking main condenser tubes, the motor thrust bearing on Circulating Water Pump 2-1 failed. Unit 2 was restricted to 50% power until the pump was returned to service.

On September 16, 1986 Unit 1 experienced an ESF actuation when a spurious high level alarm on RM-25 caused the control room ventilation system to shift to Mode 4 on both units.

On September 17, 1986 Unit 2 returned to full power.

On September 18, 1986 Unit 2 experienced a reactor trip and safety injection when adjustment of the main feedwater pump 2-2 controller caused the pump to runback to minimum speed.

On September 18, 1986 Unit 2 experienced a reactor trip from Mode 3 (Hot Standby) while checking lug screw tightness in the reactor trip breaker cubicles.

On September 20, 1986 Unit 2 was synchronized to the PGandE system.

On September 21, 1986 Unit 2 returned to full power.

On September 23, 1986 Unit 2 reduced power to 50% to investigate main condenser tube leakage.

On September 24, 1986 Unit 2 returned to full power.

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On September 24, 1986 Unit 2 returned to full power.

On September 26, 1986 Unit 2 reduced power to 50% to investigate main condenser tube leakage.

On September 27, 1986 Unit 2 returned to full power.

On September 30, 1986 Unit 1 ended the month shutdown for refueling.

Unit 2 reduced power to 50% to investigate main condenser tube leakage and ended the month at 50%

power.

Unit I was continuing its first refueling outage which started August 29.

The first fuel assembly was removed from the reactor on September 30.

Unit 2 operated this month with a unit availability factor of 91.7% and a unit capacity factor of 78.8%. Unit 2 reduced power five times this month, once for main steam isolation valve testing and four times to investigate and repair main condenser tube leaks. In addition, Unit 2 experienced a reactor trip and subsequent safety injection from power and a reactJr trip from Mode 3.

No ciiallenges to the steam generator safety valves or pressurizer power operated relief valves have been made. Unit I has numerous safety related maintenance. activities performed in support of the refueling outage, including:

o Steam generator feedwater sparger "J" tube replacement o Steam generator eddy current tube inspection o Steam generator sludge removal o Reactor disassembly for refueling o Overhaul of two containment fan cooler unit motors o Nuclear instrument inverter changeout of inverters 1-3 and 1-4 o Installation of redundant overcurrent devices for containment penetration conductors No major safety related maintenance was performed on Unit 2 this month.

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OPERATING DATA REPORT DOCKET N0. 50-275 DATE 10/01/86 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: September 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 720.0 6551.0 12285.3

12. Number Of Hours Reactor Was Critical 0.0 5740.4 11038.7

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0 l'4. Hours Generator On-Line 0.0 5714.9 10922.2 15.* Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 0.0 16927830 33493283

17. Gross Electrical Energy Generated (MWH) 0.0 5608200 11122532

18. Net Electrical Energy Generated (MWH) -3512 5312711 10546945

19. Unit Service Factor 0.0 87.2 88.9 H20. Unit Availability Factor 0.0 87.2 88.9

21. Unit Capacity Factor (Using MDC Net) 0.0 75.6 80.0

22. Unit Capacity Factor (Using DER Net) 0.0 74.7 79.1

23. Unit Forced Outage Rate 100.0 11.2 10.2

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: 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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OPERATING DATA REPORT l

[ DOCKET NO. 50-323  ;

I DATE 10/01/86

} COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 l

l OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 2

2. Reporting Period: September 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): 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:

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 720.0 4844.0 4844.0

12. Number Of Hours Reactor Was Critical 683.5 4648.0 4648.0

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 660.0 4521.4 4521.4

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 2000642 13934646 13934646

17. Gross Electrical Energy Generated (MWH) 649600 4551499 4551499

18. Net Electrical Energy Generated (MWH) 611852 4307223 4307223

19. Unit Service Factor 91.7 93.3 93.3

20. Unit Availability Factor 91.7 93.3 93.3

21. UnitCapacityFactor(UsingMDCNet) 78.8 82.4 82.4

22. Unit Capacity Factor (Using DER Net) 75.9 79.5 79.5

23. Unit Forced Outage Rate 8.3 6.7 6.7

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

Unit 2 Refueling Outage, April 1, 1987, 10 weeks

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)

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i AVERAGE DAILY UNIT POWER LEVEL

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DOCKET N0. 50-275 UNIT Diablo Canyon Unit 1 DATE 10/01/86 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 MONTH September 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 -21 17 0 2 -10 18 -3 3 -20 19 -4 4 -9 20 -5 5 -5 21 -3 6 -4 22 -3 7 -4 23 -3 8 -3 24 -3 9 -4 25 -3 10 -3 26 -3 11 -4 27 -3 12 -4 28 -3 13 -3 29 -3 14 -3 30 -3 15 -3 16 -2 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Net for each day in the r: porting 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 10/01/86 COMPLETED BY A.T. Keller TELEPHONE (805)595-7351 MONTH September 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 1088 17 775 2 1079 18 421 3 1079 19 -49 4 1079 20 -39 5 1075 21 474 6 1008 22 1037 7 1058 23 926 8 1070 24 931 9 1003 25 1082 10 1049 26 813 11 999 27 827 12 1070 28 1075 13 1071 29 1075 14 570 30 967 15 420 16 461 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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LNIT SHUTDOWNS .

PAGE 1 0F 1- DOCKET N0. _ 50-275 UNIT _NAME Diablu Canyon Unit 1 '

DATE' 10/01/86 ,.

COMPLETED BY D.P. SISK REPORT MONTH SEPTEMBER 1986 TELEPHONE (805)595-7351 Method of Licensee System Component Cause & Corrective Duration 2 3 Event 4

Action to Type 5 No. Date (Hours) Reason Shutdown Report # Code Code Prevent' Recurrence 1 8/29/86 S 720.0 C 4 N/A N/A N/A Diablo Canyon Unit I continued its first refueling outage.

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) 9-0ther DC0455

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._ UNIT SHUTDOWNS: .

Page 1 of 1: DOCKET NO. 50-323 -

UNIT'NAME- Diablo Canyon Unit 2  :=

DATE' 10/01/86 g COMPLETED BY' D.P.-SISK REPORT MONTH SEPTEMBER 1986 TELEPHONE (805)595-7351 '

' Method of Licensee System Component Cause 8 Corrective Duration Event Action to No. Date' Type l 2 3 Report #- 4 5' (Hours) Reason Shutdown Code Code Prevent Recurrence 1 09/18/86. F 60.0 G 3 2-86-023 SB LC Main feedwater pump 2-2 controller caused the pump to_run back to minimum _ &

speed while plant personnel were making adjustments to the-Lovejoy controller.

The root cause of this event was determined to be personnel _ error. To prevent recurrence, applicable personnel are receiving additional training on the characteristics of.the Lovejoy controllers.

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 l C-Refueling 3-Automatic Scram Event Report (LER) File

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

! E-Operator Training & License Examination previous-month.

i F-Administrative 5-Power reduction 5- t l G-Operational Error (Explain)z 6,7,8-N/A Exhibit I.- Same Source

! -H-0ther(Explain) 9-Other a I DC0455 i

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. I PACIFIC GAS AND ELECTR,IC C O M PANY DIABLO CANYOM POWER PLANT ggggglll Y PO. Box 56. Avila Beach, Cahfomia 93424 * (805) 595-7351 erzzm R.C. THORNBERRY PL.ANY MANAGER October 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 September, 1986 Gentlemen:

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

Sincerely, ROBERT C. THORNBERRY RCT:lm l

Enclosures 1

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

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