ML20106J653

Monthly Operating Rept for Dec 1984

ML20106J653
Person / Time
Site:	Diablo Canyon
Issue date:	12/31/1984
From:	Kanick B, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8502190061
Download: ML20106J653 (6)

Text

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. . s. . MON 1tiLY NARRATIVE REPORT

. OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and major maintenance experience for:the month of December, 1984. This narrative report was prepared by the plant staff and is submitted in accordance with Section 6.9.1.10 of the Plant Technical Specifications.

On December.5, 1984, Unit 1 experienced a reactor trip.

On December 6, 1984, Unit 1 axperienced a reactor trip.

On December 15 1984, Unit i experienced a turbine trip.

On December 15, 1984, Diesel Generator 1-2 autostarted due to undervoltage on 4KV Bus G.

On December 5,1984, a drain line off the main steam line from Steam Generator 1-1 developed a leak that was repaired by replacing a section of the drain line.

On December 12, 1984, turbine power was reduced and the turbine was tripped to.

permit the scheduled removal of the Feedwater Regulating Valve Volume Boosters.

There is no major safety-related maintenance to report.

On December 15, 1984, Steam Generator Safety Valves RV-7 and RV-9 opened to relieve pressure in SG 1-2.

No challenges to the PORVs have been madei No changes have been made in the Offsite Dose Calculation Procedure, the, Environmental Radiological Monitoring Procedure, or any radioactive waste treatment systems.

8502190061 841231 DR ADOCK 05000275 <

PDR .

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OPERATING DATA REPORT _

DOCKETN01 50-275' DATE- 01/04/85-COMPLETED-BY' Bob Kanick

. TELEPHONE (805)595-7351

'0PERATING STATUSL

1. Unit Name: Diablo: Canyon Unit 1

2. _ Reporting Period: -December 1984

3. ! Licensed Thermal -Power,(MWt): 3338

-4.. Nameplate Rating-(Gross MWe): 1170 E 5.'. Design Electrical -Rating (Net MWe): -1084

6. . Maximum Dependable Capacity 1134-

7. Maximum Dependable _ Capacity NetMWe): _ Gross1084MWe):

8.- If Changes _0ccur in Capacity Ratings.(Items Nu'mber:3 Through 7) Since Last Report, 1Give Reasons:

9. Power' Level-To Which Restricted, If Any (Net MWe): N.A..

10. Reasons For Restrictions, If Any: None i

This Month Yr-to-Date Cumulative  !

11. Hours In Reporting Period 744- '8784- 8784

12. Number Of Hours -Reactor Was Critical 713 -

1421- 1421 13.- Reactor Reserve Shutdown Haurs 0 0 0

14. Hours Generator On-Line 624 814 814

15. Unit Reserve Shutdown Hours 0 -0 0

16. Gross Thermal Energy Generated (MWH) 781,228 971,222 971,222

17. Gross Electrical Energy Generated (MWH) 221,700 262,600 262,600

18. Net Electrical Energy Generated (MWH) 187,978 204,005* 204,005*

19. Unit' Service Factor N/A**

20. Unit Availability Factor N/A**

21. UnitCapacityFactor(UsingMDCNet) N/A**

22. Unit Capacity Factor (Using DER Net) N/A**

23. Unit Forced 0utage Rate .

N/A**

24. ShutdownsScgduledOverNext6 Months (Type,Date,andDurationof.Each):

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

26. Units In Test Status (Prior to Commercial Operation):

Forecas t- Achieved INITIAL CRITICALITY April 1984 April ~'1984 INITIAL ELECTRICITY November 1984 Nov. 198T COMMERCIAL OPERATION ~ February 1985 '

• Net Electrical Energy Generated - Year-to-Date 'and Cumulative totals started.on the first :of November, .1984 (Month Full Power license issued)..

• • These_ sections not applicable until commencement of commercial operation. .

DC0044 4

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AVERAGE DAILY UNIT; POWER LEVEL

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DOCKET NO.' 50-275 UNITE Diablo Canyon Unit l~

DATE 01/04/85

-COMPLETED BY ' Bob Kanick TELEPHONE -(805)S95-7351-

MONTH December 1984 DAY '

AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY. POWER LEVEL (lWE-ItT) (lWE-leT) 1 +235- 17 +252 2 -+235 18 +240; ,

3 +231 19 +240 4 +272 20 +365

-5 +76 21 +447:

6 -37 22 +455 7 +112 23 +443 8 +219 24 +452 9 +220 25 +494 10 +224 26 +218-11 +228 27 +373 12- -4 28 +440 13 -37 29 +432 14 -37 30 +436 15 -0 31 +427.

16 +182 INSTRUCTIONS-t 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.

DC0044 L5 l

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UNIT'SHUE0WNS AND POWER REDUCTIONS PAGE 1 0F-2 DOCKET NO. 50-275 ..-

UNIT NAME Diablo Eanyon Unit 1 DATE- 01/04/e5 -

COMPLETED-BY D.P. F~.SK  :

TELEPHONE D ')h95-7351 REPORT MONTH DECEMBER 1984 -

Method of Licensee System Component Cause & Corrective Duration Shutting Action to Date Type y 2 3. Event 4 5 No. (Hours) Reason Down Reactor Report # Code Code Prevent Recurrence 1 12-5 F .. .6 A N/A N/A SB Pipe Turbine power was reduced and the turbine was tripped to-permit repair to a main steam drain line leak. The leak was repaired by replacing a section of.the drain line.

The reactor tripped when th'b

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2 12-5 F 14 G 3 84-032 IG Comp operator failed to insure that the low power-pennissive (P-7)'

had reset before tripping the turbine. The turbine. power permissive (P-13) setpoint will be. reset using actual plant data during the outage-following the 50 percent load rejection. test. The event has.

been reviewed by all Unit 1

. operators.

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. EventReport(LER) File D-Regulatory Restriction 4-Other (Explain) (NUREG-1022)

E-0perator Training & License Examination F-Administrative 5 G-Operational Error'(Explain) Exhibit I - Same Source H-Other(Explain)

DC0044 6

UNIT SHUTDOWNS AND POWER REDUCTIONS '..

PAGE 2 0F 2 DOCKET NO. 50-275 .- '...

UNIT NAME' Diablo Canyon Unit 1 DATE 01/04/85 -

COMPLETED BY D.P. SlSK  :

TELEPHONE- (805)595-7351 REPORT MONTH DECEMBER 1984 .

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

~

3 12-6 F 16 H 3 84-033 IG DET The reactor tripped when the.

source range high flux trip setpoint was exceeded before the intermediate range permissive allowed blockage-of the trip. The compensating voltage for the intermediate range detectors has been reset.

4 12 S 87 8 1 N/A JB FCV Turbine power was reduced and the turbine was tripped to permit scheduled removal of Feedwater Regulating Valve Volume Boosters.

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 Sheet.s for Licensee C-Refueling 3-Automatic Scram. Event Report (LER) File D-Regulatory Restriction 4-Other(Explain) (NUREG-1022)

E-Operator Training & License Examination F-Administrative 5 G-Operational Error (Explain) Exhibit I - Same Source H-Other (Explain)

DC0044 .7

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' PACIFIC OAS AND E LE C T RIC C O M PANY DIABLO CANYON POWER PLANT FWE ,

I P.O. Box 56 Avila Beach, Califomia 93424 - (805) 595-7351-R.C. THORNBERRY PLANT MANAGER January 7, 1985 Office of Management Information and Program Control U.S. Nuclear Regulatory Commission Washington, DC 20555 RE: Docket No. 50-275 License No. DPR-80 Monthly Operating Report for December, 1984 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon Unit 1 for December 1984. This report is submitted in accordance with Section 6.9.1.10_ of our Technical Specifications.

Sincerely,

$$f R. C. THORNBERRY

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RCT:lah Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC DC0044 1 96 i