ML20212M104

Monthly Operating Repts for Oct 1986

ML20212M104
Person / Time
Site:	Diablo Canyon
Issue date:	10/31/1986
From:	Keller A, Nelson T, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
DCO455, NUDOCS 8701300007
Download: ML20212M104 (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 October,1986. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.7 of the i Units 1 and 2 Technical Specifications.

On October 1, 1986 Unit 1 started the month shutdown for its first refueling outage. Unit 2 started the month at 50%

power.

Unit 2 returned to full power then reduced power to 50% to locate saltwater leakage into the main condenser.

i Unit 1 experienced an ESF actuation when a

! spurious high radiation level alarm actuated the containment ventilation isolation system.

On October 2, 1986 Unit 2 returned to full power.

Unit 2 experienced an ESF actuation when diesel generator 2-2 automatically started during an j automatic bus transfer due to an electrician inadvertently grounding a terminal in a component cooling water pump breaker cubicle while performing preventive maintenance.

On October 3, 1986 Unit 2 reduced power to 50% to locate saltwater leakage into the main condenser.

On October 4,1986 Unit 2 returned to full power.

t On October 6, 1986 Af ter peak load demand Unit 2 reduced power to 60%

l to lower steam generator chloride levels by reducing chloride inleakage cased by vibrating condenser tubes.

On October 7, 1986 Unit I completed defueling. Unit 2 returned to full power to support the PGandE system load then af ter peak load demand reduced to 60% to lower

steam generator chloride levels by reducing chloride inleakage caused by vibrating condenser tubes.

On October 8,1986 Unit 2 returned to full power then after peak load j demand reduced power to 50% to locate saltwater 4

leakage into the main condenser.

i Unit 1 experienced an ESF actuation when a spurious high radiation level alarm actuated the 8701300007 061031 containment ventilation isolation system.

PDR ADOCK 00000275 R PDR 1

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On October 10, 1986 Unit 2 returned to full power then reduced power to 60% to locate saltwater leakage into the main condenser.

On October 11, 1986 Unit 2 returned to full power.

On October 15, 1986 Commenced reloading Unit 1 core.

On October 19, 1986 Unit I core reload completed.

On October 31, 1986 Unit 1 ended the month shutdown for refueling.

Unit 2 ended the month at full power.

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

The core offload to the spent fuel pool commenced on September 30 and was completed on October 7. The core reload commenced on October 15 and was completed on October 19. The only problem experienced was during the core offload a fuel assembly was tilted. After a minor rigging operation the tilted fuel assembly was righted.

Unit 2 operated this month with a unit availability factor of 100% and a unit capacity factor of 92.8%. Unit 2 reduced power six times this month, twice to improve steam generator chemistry and four times to investigate and repair main condenser tube leaks.

No challenges 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 o Diesel Generator 1-1, 1-2 and 1-3 18 month inspections o 4 kV vital bus wiring inspection o Setting of limit switches on motor operated valves o Anchor Darling model 5500 snubber modifications No major safety related maintenance was performed on Unit 2 this month.

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OPERATING DATA REPORT DOCKET N0. 50-275 DATE 11/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 i OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: October 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 745.0 7296.0 13030.3

12. Number Of Hours Reactor Was Critical 0.0 5740.4 11038.7

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. 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) -2688 5310023 10544257

, 19. Unit Service Factor 0.0 78.3 83.8 1 20. Unit Availability Factor 0.0 78.3 83.8

21. Unit Capacity Factor (Using MDC Net) 0.0 67.8 75.4

22. Unit Capacity Factor (Using DER Net) 0.0 67.0 74.5

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 19, 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 DOCKET NO. 50-323 DATE 11/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 OPERATING STATUS

1. Unit Name: Diablo Canyon Unit 2

2. Reporting Period: October 1986

3. Licensed Thermal Power (MWt): 3411

4. Nameplate Rating (Gross MWe): 1164

5. Design Electrical Rating (Net MWe): 1119 i 6. 1130

7. Maximum Maximum Dependable Dependable Capacity Capacity ((Gross1079 NetMWe): MWe):

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 745.0 5589.0 5589.0

12. Number Of Hours Reactor Was Critical 745.0 5393.0 5393.0

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0

14. Hours Generator On-Line 745.0 5266.4 5266.4

15. Unit Reserve Shutdown Hours 0.0 0.0 0.0

16. Gross Thermal Energy Generated (MWH) 2385411 16320057 16320057

17. Gross Electrical Energy Generated (MWH) 785400 5336999 5336999

18. Net Electrical Energy Generated (MWH) 745634 5052960 5052960

19. Unit Service Factor 100.0 94.2 94.2

20. Unit Availability Factor 100.0 94.2 94.2

21. Unit Capacity Factor (Using MDC Net) 92.8 83.8 83.8

22. Unit Capacity Factor (Using DER Net) 89.4 80.8 80.8

23. Unit Forced Outage Rate 0.0 5.8 5.8

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 l 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) i DC0455

AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. _50-275 UNIT Diablo Canyon Unit 1 DATE 11/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH October 1986 DAY AVERAGE DAILY POWER LEVEL DAY (MWe-Net) AVERAGE DAILY POWER LEVEL (MWe-Net) 1

-4 17 2

-5

-3 18 3

-5

-3 19 4

-5

-4 20 5

-6

-3 21 6

-4

-3 22 7

-3

-3 23 8

-3

-? 24 9

-7

-2 25 10

-2 0

26 -1 11 -2 27 -9 12 -3 28 -4 13

-3 29 14

-3

-3 30 15

-3

-3 31 16

-3

-4

{

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INSTRUCTIGNS

{ On this rnanth.

reporting format,Cornpute list thetoaverage daily unit power level in ifWe-Net for each day in the the nearest whole megawatt.

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AVERAGE DAILY UNIT POWER LEVEL DOCKET N0. 50-323 UNIT Diablo Canyon Unit 2 DATE 11/03/86 COMPLETED BY A.T. Keller TELEPHONE (805)S95-7351 MONTH October 1986 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (MWe-Net) 1 844 17 1071 2 923 18 1075 3 964 19 1038 4 669 20 1075 5 1042 21 1075 6 1057 22 1075 7 900 23 1088 8 847 24 1083 9 542 25 1083 10 962 26 1054 11 775 27 1092 12 1071 28 1087 13 1075 29 1083 14 1075 30 1079 15 1066 31 1083 16 1071 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 of 1 DOCKET NO. 50-275

• UNIT NAME Diablo Canyen Unit 1 DATE 11/03/86 .

COMPLETED BY T.A. NELSON REPORT MONTH OCTOBER 1986 TELEPHONE (805)595-7351 Licensee Cause & Corrective Duration Method of System Component Action to Event No. Date Type l 2 3 4 5 (Hours) Reason Shutdown Report # Code Code Prevent Recurrence 1 8/29/86 5 745.0 C 4 N/A N/A N/A Diablo Canyon Unit I continued its first refueling outage.

I 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

UNIT SHUTDOWNS Page 1 of 1 DOCKET NO. 50-323 *

UNIT NAME Diablo Canyon Unit 2 .'

l DATE 11/03/86 .

1 COMPLETED BY T.A. NELSON

{ REPORT MONTH OCTOBER 1986 TELEPHONE (805)595-7351

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Licensee Cause & Corrective i Duration Method of System Component Action to 2 3 Event 4 Type l 5 No. Date (Hours) Reason Shutdown Report # Code Code Prevent Recurrence

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None l

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r 1 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

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PACIFIC GAS AND E LE C T RIC C O M PANY DIABLO CANYON POWER PLANT ggggggggg Y PO Box 56 Avila Beach, Cahfornia 93424 *(805) 595-7351 R C. THORNBERRY PLANT AAANAOL9 November 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 October, 1986 Gentlemen:

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

Sincerely, l

$0 ROBERT C. THORNBERRY RCT:Im Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC i

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