ML20234B498

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Monthly Operating Repts for Aug 1987
ML20234B498
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 08/31/1987
From: Bedesem P, Hug M, Townsend J
PACIFIC GAS & ELECTRIC CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
NUDOCS 8709180432
Download: ML20234B498 (10)
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l MONTHLY NARRATIVE REPORT OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and major maintenance experience for the month oi' August, 1987. 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.

Narrative of Daily Significant Plant Events On August 1, 1987 Unit 1 started the month at 100% power. Unit 2 started the month at 100% power.

j Unit I decreased power to 53% to search for leaking i condenser tubes. Unit 1 then increased power to 100% .

due to system load requirements. i At 0400 PDT, both trains of the auxiliary building ventilation system were unavailable to start on an 4 auto-start signal resulting in violation of Technical f Specification (TS) 3.7.6.1 and entry into.TS 3.0.3. At 1 0412 PDT, TS 3.0.3 was exited with one train fully operable when the exhaust fan E-1 control switch was 1 taken to the AUTO position, which restored.the auto start feature.

On August 2, 1987 Unit I decreased power to 46% power to search for leaking condenser tubes. Unit i returned to full power after plugging leaking condenser tubes.

On August 5, 1987 Unit 1 decreased power to 50% to search for leaking condenser tubes.

On August 6, 1987 Unit I returned to full power after plugging leaking I condenser tubes.

On August 8, 1987 Unit 1 decreased power to 49% to perform a demusseling operation. Unit 1 increased power to 75% after performing the demusseling operation.

On August 9, 1987 Unit I returned to full power. Unit 2 reduced power to 72% due to high temperature on number 2 heater drain pump.

On August 10, 1987 Unit 2 increased power to 93% after repairing 2-2 heater drip pump bearings and then returned to full power.

On August 11, 1987 Unit 1 decreased power to 45% to clean condenser waterboxes.

E griggM fyah L

-l On August 12, 1987 Unit i returned to full power after cleaning condenser water boxes.

On August 14, 1987 Unit 1 decreased power to 65% to perform demusseling.

A 10CFR50.72(b)(2)(ii) Non-Emergency (4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />) Report was made regarding a Unit 2 diesel generator auto-start. The diesel generator started and loaded ,

onto the 4 kV bus H because of a non-valid sensed '

undervoltage condition caused by a short circuit in a 4 kV breaker. The diesel was returned to standby condition and the short curcuit was repaired.

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On August 16, 1987 Unit i returned to full power after performing '

demusseling. 1 On August 17, 1987 Unit 2 decreased power to 52% to perform maintenance on main feedpump 2-1.

On August 18, 1987 At 1320 PDT, both trains of the auxiliary building ventilation system were inoperable resulting in a violation of Technical Specification (TS) 3.7.6.1 and entry into TS 3.0.3. At 1355 PDT, TS 3.0.3 was exited when both trains of auxiliary building ventilation were restarted.

Unit 2 was returned to full power after mainfeed pump maintenance was completed.

On August 24, 1987 A 10CFR50.72(b)(2)(ii) Non-Emergency (4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />) Report was made regarding an automatic initiation of containment ventilation isolation system (CVIS).

On August 25, 1987 A 10CFR50.72(b)(2)(ii) Non-Emergency (4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />) Report was made regarding a Unit i diesel generator auto-start. The diesel started and loaded onto the 4 ,

kV bus F due to improper reracking of a breaker. 1 Unit 2 reduced power to 50% to perform maintenance on 2-2 main feedwater pump and number 2 feedwater heater drip pump.

On August 26, 1987 Unit 2 returned to full power after completing maintenance on 2-2 main feedwater pump and number 2 feedwater heater drip pump.

On August 31, 1987 Unit i ended the month at 100% power. Unit 2 ended the month at 100% power.

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Summary of Plant Operating Characteristics, Power Reductions and Unit l Shutdowns

! Unit 1 operated this month with a unit availability factor of 100% and a unit capacity factor of 90.3%. Unit 1 reduced power 6 times this month, 3 times to plug leaking condenser tubes, twice for demusseling and once to clean condenser water boxes.

Unit 2 operated this month with a unit availability factor of 100% and a unit capacity factor of 99.0%. Unit 2 reduced power 3 times this month, once for a high temperature on number 2 heater drain pump, once to perform maintenance on main feedpump 2-1 and once to perform maintenance on main feedpump 2-2 and number 2 heater drip pump.

Summary of Significant Safety Related Maintenance There was no significant safety related maintenance this month.

Actuations of Steam Generator Safety Valves or Pressurizer Power Operated Relief Valves No challenges to the steam generator safety valves or pressurizer power operated relief valves were made.

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f

, OPERATING DATA REPORT i

DOCKET N0. 50-275

{

DATE 09/02/87  !

COMPLETED BY P. 8edesem l TELEPHONE (805)S95-4097

' OPERATING STATUS f

1. Unit Name: Diablo Canyon Unit 1
2. Reporting Period: August 1987
3. Licensed Thermal Power (Wt): 3338
4. Nameplate Rating (Gross We): 1137
5. Design Electrical Rating (Net MWe): 1086 g
6. Maximum Dependable Capacity (Gross MWe): 1124 l
7. Maximum Dependable Capacity (Net NWe): 1073.4 li
8. If Changes Occur in Capacity Ratings (Items Number 3 Through 7) Since Last Report, )

Give Reasons: ]

N/A I

9. Power Level To Which Restricted If Any (Net MWe): N/A :l
10. Reasons For Restrictions, If Any: None l

l This Month Yr-to-Date Cumulative

  • l j

11.. Hours In Reporting Period 744.0 5831.0 20325.3 l 12.. Number Of Hours Reactor Was Critical 744.0 5634.9 16900.5

13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0  !
14. ' Hours Generator On-Line 744.0 5560.3 16525.3
15. Unit Reserve Shutdown Hours 0.0 0.0 0.0 1
16. Gross Thermal Energy Generated (W H) 2090122 16573459 50115528
17. Gross Electrical Energy Gencrated (MWH) 757200 5740600 T6874332
18. Net Electrical Energy Generated (MWH) 720908 5452355 15980176
19. Unit Service Factor 100.0 95.4 81.3
20. Unit Availability Factor 100.0 95.4 81.3
21. Unit Capacity Factor (Using M C Net) 90'.T 87.1 73.2
22. Unit Capacity Factor (Using DER Net) 89.2 86.1 72.4
23. Unit Forced Outage Rate 0.0 4.6 5.0
24. Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

N/A 1 l

25. If Shut Down At End Of Report Period, Est. Date of Startup: N/A l

l

  • As of commercial operation on May 7,1985 at 0243 PDT.

l M0.RPT

l l

1 OPERATING DATA REPORT i

i DOCKET NO. 50-323 l DATE 09/03/87 l COMPLETED BY P. Bedesem -

TELEPHONE (805)S95-4097 OPERATING STATUS j

1. Unit Name: Diablo Canyon Unit 2 i i
2. Reporting Period: August 1987  !
3. Licensed Thermal Power (Wt): 3411
4. Nameplate Rating (Gross We): 1164
5. - Design Electrical Rating (Net We): 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 l

9. Power Level 10 Which Restricted, If Any (Net MWe): N/A l
10. Reasons for Restrictions, If Any: None This Month Yr-to-Date Cumulative *
11. Hours In Reporting Period 744.0 5831.0 12884.0
12. Number Of Hours Reactor Was Critical 744.0 3280.9 10137.9
13. Reactor Reserve Shutdown Hours 0.0 0.0 0.0 .
14. Hours Generator On-Line 744.0 2983.4 9713.7  !
15. Unit Reserve Shutdown Hours 0.0 0.0 0.0
16. Gross Thermal Energy Generated (MWH) 2318389 9025842 30106560
17. Gross Electrical Energy Generated (MWH) 834500 3024600 9937099 l
18. Het Electrical Energy Generated (MWH) 794649 2817589 9365863 '
19. Unit Service Factor 100.0 51.2 75.4 i
20. Unit Availability Factor 100.0 51.2 75.4
21. Unit Capacity Factor (Using MDC Net) 99.0 44.8 67.4
22. Unit Capacity Factor (Using DER Net) 95.4 43.2 65.0  !
23. Unit Forced Outage Rate 0.0 12.0 7.0 .
24. Shutdowns Scheduled Over Hext 6 Months (Type, Date, and Duration of Each):

l N/A

25. If Shut Down At End Of Report Period, Est. Date of Startup: N/A
  • As of commercial operation on March 13, 1986 at 0300 PST.

l M0.RPT

. AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-275 UNIT Diablo Canyon Unit 1 DATE 09/03/87 COMPLETED BY P. Bedesem TELEPHONE (805)S95-4097 i

l MONTil August 1987 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (MWe-Net) (We-Net) 1 743 17 987 2 763 18 1046 3 1083 19 1083 4 1086 20 1088 5 972 21 1084 6 894 22 1075 7 1086 23 1084 8 582 24 1084 9 665 25 1084 10 1080 26 1080 11 948 27 1084 12 873 28 1080 13 1083 29 1026 14 1059 30 1080 15 475 31 1085 16 597 INSTRUCTIONS On this format, list the average daily unit power level in MWe-Het for each day in the reporting month. Compute to the nearest whole megawatt.

The Average Monthly Electrical Power Level for August,1987 = 968.96 MWe-Net.

M0.RPT

1 r .

l . AVERAGE DAILY UNIT POWER LEVEL l

l DOCKET N0. 50-323 4

! UNIT Diablo Canyon Unit 2 DATE 09/03/87 COMPLETED BY P. Bedesem TELEPHONE (805)S95-4097 MONTil August 1987 i

DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL  :

(We-Net) (MWe-Net) I 1 1101 17 977 2 1072 18 921 3 1105 19 1101 1 4 1105 20 1100 l 5 1104 21 1100 l l 6 1104 22 1105 i 7 1092 23 1076 8 1101 24 1096 I 9 852 25 968 10 996 26 959 i

, 11 1101 27 1100 l 12 1100 28 1100 l 13 1106 29 1096 14 1105 30 1076 l 15 1110 31 1095 l 16 1089 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.

The Average Monthly Electrical Power Level for August, 1987 = 1068.08 MWe-Net.

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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, Cahfomia 93424 - (805) 595-7351 lllllllll r_ _ _ _ ,

R C. THORNBERRY l j

PLANT MANAGER September 15, 1987 1

4 i

U.S. Nuclear Regulatory Comission Attn: Document Control Desk  !

Washington, DC 20555 RE: Docket No. 50-275 and 50-323 License No. DPR-80 and DPR-82 l Monthly Operating Report for August,1987 j Gentlemen:

i

. Enclosed are the completed monthly operating report forms for Diablo Canyon Units 1 and 2 for August, 1987. This report is submitted in accordance with Section 6.9.1.7 of the Units 1 and 2 Technical Specifications.

Sincerely,

/

4 OHN D. TOWNSEND JDT:lm l

Enclosures j i

cc Mr. John B. Martin, Regional Administrator I Region V - USNRC l 1

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