DCL-03-001, December 2002 Monthly Operating Report for Diablo Canyon Units 1 & 2

December 2002 Monthly Operating Report for Diablo Canyon Units 1 & 2

ML030230691
Person / Time
Site:	Diablo Canyon
Issue date:	01/15/2003
From:	Becker J Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-03-001
Download: ML030230691 (6)

Text

WI PacificGas and ElectricCompany Diablo Canyon Power Plant P0 Box 56 Avila Beach, CA 93424 8005456000 January 15, 2003 PG&E Letter DCL-03-001 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Docket No. 50-275, OL-DPR-80 Docket No. 50-323, OL-DPR-82 Diablo Canyon Units 1 and 2 Monthly Operating Report for December 2002

Dear Commissioners and Staff:

Attached is the Monthly Operating Report for Diablo Canyon Power Plant, Units 1 and 2, for December 2002. This report is submitted in accordance with Technical Specification 5.6.4 and NRC Generic Letter 97-02.

Sincerely, James R. Becker Vice President,DCPPOperationsand Station Director smg/1713/R0240323 Enclosures cclenc: Paul R. Fox, American Nuclear Insurers Robert D. Glynn, Jr.

Ellis W. Merschoff, NRC Regional Administrator, Region IV David L. Proulx, NRC Senior Resident Inspector Gregory M. Rueger Girija S. Shukla, NRC Project Manager INPO Record Center A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Catlawav a Comanche Peak

• Diabto Canyon

• Palo Verde e South Texas Proiect e Wolf Creek

Enclosure 1 PG&E Letter DCL-03-001 DECEMBER 2002, OPERATION SUMMARIES DIABLO CANYON POWER PLANT UNITS 1 AND 2 Summary of Unit I Operation Unit 1 began December in Mode 5 (Cold Shutdown) to complete main generator rotor replacement. On December 11, 2002, Unit 1 entered Mode 1 (Power Operation) and on December 12, operators paralleled the main generator to the grid. On December 14, operators completed the ramp to 100 percent power. On December 16, operators began ramping to less than 25 percent power due to a forecast for high ocean swells.

Operators reduced power to approximately 15 percent and separated the main generator from the grid due to high turbine bearing vibrations and to perform a balance shot. On December 17, operators paralleled the generator to the grid and on December 18, the ramp to 100 percent power was completed. Unit I remained at 100 percent power for the remainder of the month.

Summary of Unit 2 Operation Unit 2 began December in Mode 1 at approximately 100 percent power. On December 16, operators ramped the unit to less than 25 percent power due to high ocean swell forecasts. On December 17, after swells began to diminish, operators began the ramp to full power. On December 17, with Unit 2 at 67 percent power, operators began to ramp down to approximately 50 percent power to clean the condenser tubesheets. On December 18, after cleaning the tubesheets, operators began ramping to full power and Unit 2 reached 100 percent power on December 19, 2002. Unit 2 remained at 100 percent power for the remainder of the month.

Actuations of Safety or Pressurizer Power Operated Relief Valves There were no challenges to the pressurizer power operated relief valves, pressurizer safety valves, or steam generator safety valves.

Enclosure 2 PG&E Letter DCL-03-001 OPERATING DATA REPORT DOCKET NO.: 50-275 UNIT NAME: Diablo Canyon Unit 1 DATE: 1/02/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: December 2002

1. Design Electrical Rating (MWe - Net): 1 1,103

2. Maximum Dependable Capacity (MWe - Net): 1,087 This Month YTD Cumulative

3. Number of Hours Reactor Critical: 500.5 6,806.8 134,226.8

4. Number of Hours Generator On-Line: 466.5 6,654.7 132,697.0

5. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWH): 452,136 7,048,210 137,206,299 1

Enclosure 2 PG&E Letter DCL-03-001 UNIT SHUTDOWNS DOCKET NO.: 50-275 UNIT NAME: Diablo Canyon Unit 1 DATE: 1/02/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: December 2002 NO. DATE TYPE DURATION (HOURS) REASON1 METHOD OF & CORRECTIVE CAUSEACTIONS F (Forced) SHUTTING S (Scheduled)

DOWN 2 COMMENTS 3 021020 S 266.3 A 4 Unit 1 entered a planned mid-cycle shutdown in October to investigate generator vibrations. The rotor was replaced, thus extending the outage.

021216 F 11.2 B After Unit 1 was curtailed due to high ocean swells, operators took the unit off-line to perform a balance shot due to bearing vibrations. The reactor remained in Mode 1 at approximately 15 percent power.

Therefore, this event is counted for the "duration" off-line but not as a reactor shutdown.

1. Reason 2. Method A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Trip/Scram C-Refueling 3-Automatic Trip/Scram D-Regulatory Restriction 4-Continuation from Previous Month E-Operator Training/License Examination 5-Other F- Administrative G-Operational Error (Explain)

H-Other (Explain) 2

Enclosure 2 PG&E Letter DCL-03-001 OPERATING DATA REPORT DOCKET NO.: 50-323 UNIT NAME: Diablo Canyon Unit 2 DATE: 1/02/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: December 2002

1. Design Electrical Rating (MWe - Net): 1 1119

2. Maximum Dependable Capacity (MWe - Net): 1087 This Month YTD Cumulative

3. Number of Hours Reactor Critical: 744.0 8,676.7 131,358.5

4. Number of Hours Generator On-Line: 744.0 8,663.9 129,887.9

5. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWH): 778,204 9,286,0581 136,691,990 3

Enclosure 2 PG&E Letter DCL-03-001 UNIT SHUTDOWNS DOCKET NO.: 50-323 UNIT NAME: Diablo Canyon Unit 2 DATE: 1/02/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: December 2002 NO. DATE TYPE DURATION REASON 1 METHOD OF

& CORRECTIVE CAUSEACTIONS F(Forced) (HOURS) SHUTTING COMMENTS S (Scheduled)

DOWN2 N/A There were no shutdowns this month.

1. Reason 2. Method A-Equipment Failure (Explain) 1-Manual B-Maintenance or Test 2-Manual Trip/Scram C-Refueling 3-Automatic Trip/Scram D-Regulatory Restriction 4-Continuation from Previous Month E-Operator Training/License Examination 5-Other F- Administrative G-Operational Error (Explain)

H-Other (Explain) 4