DCL-04-027, February 2004 Monthly Operating Report for Diablo Canyon, Units 1 and 2

February 2004 Monthly Operating Report for Diablo Canyon, Units 1 and 2

ML040830593
Person / Time
Site:	Diablo Canyon
Issue date:	03/12/2004
From:	Becker J Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-04-027, GL-97-002
Download: ML040830593 (6)

Text

Pacific Gas and Electric Company

.1nz James R.Becker Diablo Canyon Power Plant Vice President-Diablo Canyon PO. Box 56 Operations and Station Director Avila Beach, CA 93424 805.545.3462 March 12, 2004 Fax: 805.545.4234 PG&E Letter DCL-04-027 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 February 2004

Dear Commissioners and Staff:

Enclosed is the Monthly Operating Report for Diablo Canyon Power Plant, Units I and 2, for February 2004. This report is submitted in accordance with Technical Specification 5.6.4 and NRC Generic Letter 97-02.

Sincerely, James R. ecker smg/1 713/R0255755 Enclosures cc/enc: Paul R. Fox, American Nuclear Insurers Robert D. Glynn, Jr.

Bruce S. Mallett, NRC Regional Administrator, Region IV David L. Prouix, 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 Catlaway

• Comanche Peak

• Diablo Canyon

• Palo Verde

• South Texas Project

• Wolf Creek

Enclosure 1 PG&E Letter DCL-04-027 FEBRUARY 2004, OPERATION SUMMARIES DIABLO CANYON POWER PLANT UNITS I AND 2 Summary of Unit 1 Operation Unit 1 began the month in Mode 1 (Power Operation) at approximately 100 percent power. For several months, operators have been monitoring a slow degradation in the performance of the main generator stator core cooling water (SCCW) system as indicated by reduced flow and rising differential temperature across the stator coil. On February 23, 2004, operators ramped to approximately 80 percent power due to limits on minimum differential between main generator SCCW and hydrogen cooling gas pressures. After reducing power, on February 25, 2004, operators commenced a planned ramp to approximately 23 percent power in response to a storm forecast predicting high ocean swells. On February 27, 2004, after the high swell warning was terminated, operators ramped to approximately 85 percent power. Unit 1 remained at that power level for the remainder of the month due to the projected degradation of stator coil cooling flow and differential temperatures.

Summary of Unit 2 Operation Unit 2 began the month in Mode 1, at approximately 100 percent power. On February 25, 2004, operators commenced a planned ramp to approximately 24 percent power due to a storm forecast predicting high ocean swells. After the high swell warning was terminated, on February 27, 2004, operators commenced ramping to approximately 100 percent power. Unit 2 remained at approximately 100 percent power for the remainder of the month.

Actuations of Pressurizer Safety or 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-04-027 OPERATING DATA REPORT DOCKET NO.: 50-275 UNIT NAME: Diablo Canyon Unit 1 DATE: 3/02/2004 COMPLETED BY: S. Guess TELEPHONE: (805) 545-4692 REPORT MONTH: February 2004 I 1. I Design Electrical Rating (Mwe - Net): l 1,103 1 2. 1Maximum Dependable Capacity (Mwe - Net): l 1,087 This Month YTD Cumulative

3. Number of Hours Reactor Critical: 696.0 1,440.0 144,426.8

4. Number of Hours Generator On-Line: 696.0 1,440.0 142,909.6

5. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWH): 715,632 1,507,061 148,298,791 I

Enclosure 2 PG&E Letter DCL-04-027 UNIT SHUTDOWNS DOCKET NO.: 50-275 UNIT NAME: Diablo Canyon Unit 1 DATE: 3/02/2004 COMPLETED BY: S. Guess TELEPHONE: (805) 545-4692 REPORT MONTH: February 2004 NO. DATE TYPE DURATION REASON' METHOD CAUSE & CORRECTIVE (YM)F (Forced)

(YYMMDD) S (Scheduled)

(HOURS) OF SHUTTINGCOMMENTS ACTIONS DOWN 2 CMET N/ 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) 2

Enclosure 2 PG&E Letter DCL-04-027 OPERATING DATA REPORT DOCKET NO.: 50-323 UNIT NAME: Diablo Canyon Unit 2 DATE: 3/02/2004 COMPLETED BY: S. Guess TELEPHONE: (805) 545-4692 REPORT MONTH: February 2004 I 1. I Design Electrical Rating (MWe - Net): l 1,119 l 2. 1Maximum Dependable Capacity (MWe - Net): 1 1,087 This Month YTD Cumulative

3. Number of Hours Reactor Critical: 696.0 1,440.0 140,089.9

4. Number of Hours Generator On-Line: 696.0 1,440.0 138,554.1

5. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWH): 724,727 1,536,758 145,953,975 3

Enclosure 2 PG&E Letter DCL-04-027 UNIT SHUTDOWNS DOCKET NO.: 50-323 UNIT NAME: Diablo Canyon Unit 2 DATE: 3/02/2004 COMPLETED BY: S. Guess TELEPHONE: (805) 545-4692 REPORT MONTH: February 2004 NO. DATE TYPE DURATION REASON' METHOD CAUSE & CORRECTIVE (YMMDD) F (Forced) (HOURS) OF ACTIONS S (Scheduled) SHUTTING COMMENTS DOWN 2 N/AThere 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