ML20091K352

Monthly Operating Rept for Apr 1984

ML20091K352
Person / Time
Site:	Diablo Canyon
Issue date:	04/30/1984
From:	Kelly W, Thornberry R PACIFIC GAS & ELECTRIC CO.
To:	NRC OFFICE OF RESOURCE MANAGEMENT (ORM)
References
NUDOCS 8406070030
Download: ML20091K352 (5)

Text

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1 OPERATING DATA REPORT I

. DOCKET N0. 50-275 -

DATE 05/04/84 l COMPLETED BY W.J. Kelly TELEPHONE (805)595-7351 OPERATING STATUS 7

1. Unit Name: Diablo Canyon Unit 1

2. Reporting Period: April 1984 Notes: Initial criticality

3. Licensed Thermal Power (MWt): 166.9 achieved April 28, 1984 at

4. Nameplate Rating (Gross MWe): 1170 0007 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />.

5.. Design Electrical Rating (Net MWe): 1084

6. MaximumDependableCapacity(GrossMWe): 1134

7. Maximum Dependable Capacity (Net MWe): 1084

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

Give Reasons: [

f

9. Power Level To Which Restricted, If Any (Net MWe): 58.50

10. Reasons For Restrictions, If Any: Low power test permit granted by the Nuclear i Regulatory Commission on April 13, 1984, effective April 19, 1984 at 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br />. [

This Month Yr-to-Date Cumulative

- 11. Hours In Reporting Period 720 3450 3450

12. Number Of Hours Reactor Was Critical 48 48 48

13. Reactor Reserve Shutdown Hours 0 0 0

14. Hours Generator On-Line 0 0 0

15. Unit Reserve Shutdown Hours 0 0 0

16. Gross Thermal Energy Generated (MWH) 0 0 0

17. Gross Electrical Energy Generated (MWH) 0 0 0 f

18. Net Electrical Energy Generated (MWH) 0 0 0

19. Unit Service Factor N/A

20. Unit Availability Factor N/A

21. Unit Capacity Factor (Using MDC Net) N/A  ;

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

23. Unit Forced Outage Rate N/A Shutdowns Scheduled Over Next 6 Months (Type, Date, and Duration of Each):

24.

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

26. Units in Test Status (Prior to Commercial Operation): Forecast Achieved INITIAL CRITICALITY April, 1984 _ April 1984 INITIAL ELECTRICITY May, 1984 ,

COMMERCIAL OPERATION July, 1984 b ohh5 N PDR $ '

0C0044 4 h .-_____.__.__ _ _ _

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• AVERAGE DAILY UNIT POWER LEVEL DOCKET NO. 50-275 UNIT Diablo Canyon Unit 1 DATE 05/04/84 COMPLETED BY W.J. Kelly TELEPHONE (805)595-7351 MONTH April 1984 DAY AVERAGE DAILY POWER LEVEL DAY AVERAGE DAILY POWER LEVEL (lWE-NET) (l%E-flET) 1 0 17 ,

0 2 0 18 0 3 0 19 0 4 0 20 0 5 0 21 0 6 0 22 0 7 0 23 0 8 0 24 0 9 0 25 0 10 0 26 0 11 0 27 0 12 0 28 __

0 13 0 29 0 14 0 30 0 15 0 16 0 INSTRUCTIONS On this format, list the averayo daily unit power level in t1We-Net for each day in the reporting month. Compute to the nearest whole megawatt.

DC0044 5

.. I

S UNIT SUID0lelS #0 P0tER EDUCTIGIS I-'

D00ET 10. 50-275 IMIT IW E JIAsto CMYON UNIT 1 DATE 3/tArm CG PLEIG BY W.J. GLLY TE&t0E (a b b e-/ m i IUGRT POEH APRIL 1%4 Method of Licensee Cause & Corrective Duration Shutting Event System Component Action to No. Date Typel (hours) Reason 2 Down Reactor 3 Report # Code" Code 5 Prevent Recurrence NONE 1

1 1

I 1 2 3 4 F: Forced Reason: Method: Exhibit G - Instructions 5: 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-Other (Explain) (NUREG-0161)

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

DC0044 6

A PACIFIC OAS AND E LE C T RIC C O M PANY 3p)pg , DIABLO CANYON POWER PLANT I PO. Box 56. Avila Beach, Califomia 93424 - (805) 595-7351  :

R.C. THORN 5ERRY PLANT MANAGE.R May 4, 1984 Office of Management Information and Program Control U.S. Nuclear Regulatory Comission Washington, DC 20555 RE: Docket No. 50-275 License No. DPR-76 Monthly Operating Report for April,1984 Gentlemen:

Enclosed are the completed monthly operating report forms for Diablo Canyon Unit I for April 1984. This report is submitted in accordance vith Section 6.9.1.10 of our Technical Specifications.

Sincerely, ,

S$Y R. C. THORNBERRY j RCT:fgm Enclosures cc Mr. John B. Martin, Regional Administrator Region V - USNRC i

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DC0044 1 1 i l t I

MONTHLY NARRATIVE REPORT OF OPERATION AND MAJOR MAINTENANCE EXPERIENCE This report describes the operating and major maintenance experience for the month of April, 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 April 1st, the Shift Foreman notified the NRC Operations Center of a Significant Event involving the momentary loss of the control room main annunciator. An Instrumentation and Controls technician misread the procedure he was following and opened the AC and DC power supply breakers for the main annunciator panels. Operators directed the technician to reclose the breakers and power was restored to the panels within 'two minutes.

On April 7th, it was discovered that two emergency Core Cooling System (ECCS) subsystems had been inoperable since April 6th. The ECCS subsystems were restored to operable condition upon discovery.

On April 13th, NRC comissioners voted to reinstate the low power license for Diablo Canyon Unit 1, to become effective at 1200 hours0.0139 days <br />0.333 hours <br />0.00198 weeks <br />4.566e-4 months <br /> on April 19, 1984.

On April 21st, prepatations for initial criticality were complete and heatup commenced. OnApril22nd,withtheplantinMode3(HotStandby)theleakage rate of the Reactor Coolant Pump No.1-4 seal package increased to greater than 1 GPM and heatup was secured. AfterplantcooldowntoMode5(ColdShutdown) and following Reactor Coolant Pump disassembly, mechanical maintenance discovered a crimped teflon backing ring on the 0-ring of the coolant pump seal package. The 0-ring was replaced with a different design and all repairs completed by April 25th.

Plant heatup commenced c3ain on April 25th and entry was made into Mode 3.

Entry into Mode 2 (Startup) was made at 1950 hours0.0226 days <br />0.542 hours <br />0.00322 weeks <br />7.41975e-4 months <br />, April 28th. Criticality was achieved on St.nday, April 29, 1984 at 0007 hours8.101852e-5 days <br />0.00194 hours <br />1.157407e-5 weeks <br />2.6635e-6 months <br />.

On April 29th an unusual Event was declared by the Shift Foreman at 0555 hours0.00642 days <br />0.154 hours <br />9.176587e-4 weeks <br />2.111775e-4 months <br /> after the performance of a surveillance leak test showed an approximate 3.5 gallon per minute leak rate from the Reactor Coolant System. In the hours preceding initial criticality, boron concentration was being reduced through the LetdownDivertValve(LCV-112A)totheLiquidHoldupTanksintheChemicaland Volume Control System. This valve was suspected of leaking by to the holdup tanks and after cycling the valve from the control room, LCV-112A seated properly and flow to the holdup tanks was secured. The Unusual Event was secured at 0640 hours0.00741 days <br />0.178 hours <br />0.00106 weeks <br />2.4352e-4 months <br />, April 29th.

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

DC0044 3

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