ML031430351

April 2003 Monthly Operating Report for Diablo Canyon Power Plant Units 1 & 2

ML031430351
Person / Time
Site:	Diablo Canyon
Issue date:	05/15/2003
From:	Becker J Pacific Gas & Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
DCL-03053, OL-DPR-80, OL-DPR-82
Download: ML031430351 (6)

Text

Flen Pacific Gas and Electric Company James R.Becker Vice President-Diablo Canyon Diablo Canyon Power Plant PO. Box 56 Operations and Station Director Avila Beach, CA 93424 May 15, 2003 805.545.3462 Fax: 805.545.4234 PG&E Letter DCL-03053 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 April 2003

Dear Commissioners and Staff:

Attached is the Monthly Operating Report for Diablo Canyon Power Plant, Units 1 and 2, for April 2003. This report is submitted in accordance vith Technical Specification 5.6.4 and NRC Generic Letter 97-02.

Sincer ly, James R. Becker LMP/1 713/R0245720 Enclosures cclenc: Paul R. Fox, American Nuclear Insurers Robert D. Glynn, Jr.

Ellis W. Merschoff, NRC Regional Administrator, Region IV David L. Prouix, NRC Senior Resident Inspector Gregory M. Rueger Girija S. Shukla, NRC Project Manager INPO Record Center 0

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callawav

• Comanche Peak

• Diablo Canvon

• Palo Verde South Texas Proiect

• Wolf Creek

Enclosure 1 PG&E Letter DCL-03-053 APRIL 2003, OPERATION SUMMARIES DIABLO CANYON POWER PLANT UNITS I AND 2 Summary of Unit 1 Operation Unit 1 began April in Mode I (Power Operation) at approximately 100 percent power.

There were no significant operational activities.

SummarV of Unit 2 Operation Unit 2 began April in Mode I at approximately 50 percent power. On April 4, 2003, with Unit 2 at approximately 54 percent power, an auxiliary feedwater (AFW) check valve was discovered with its internals installed incorrectly, prompting a Technical Specification required manual shutdown to Mode 5 (Cold Shutdown) to replace the check valve (reference NRC event number 39735).D On April 8, 2003, with Unit 2 in Mode 5, the AFW system actuated on an unplanned signal from the solid state protection system which was placed in service while a steam generator level was below the AFW actuation set point (reference NRC event number 39743). On April 15, 2003, operators entered Mode 1.

On April 16, 2003, operators paralleled Unit 2 to the grid. Unit 2 ended the month at approximately 100 percent power.

Actuations of Pressurizer Safety or Power Operated Relief Valves On April 19, 2003, with Unit 2 at approximately 92 percent power, PCV-456, Pressurizer PORV opened inadvertently during surveillance testing. The interlock automatically closed the PORV, and operators closed the block valve. The pressurizer pressure during the transient dipped to approximately 2165 PSIG. The cause was determined to be use of a superceded procedure.

There were no other challenges to the pressurizer power operated relief valves, pressurizer safety valves, or steam generator safety valves.

Enclosure 2 PG&E Letter DCL-03-053 OPERATING DATA REPORT DOCKET NO.: 50-275 UNIT NAME: Diablo Canyon Unit 1 DATE: 05/01/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: April 2003

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

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

3. Number of Hours Reactor Critical: - 719.0 2,879.01 137,105.8 4.

5.

6.

Number of Hours Generator On-Line:

Unit Reserve Shutdown Hours:

Net Electrical Energy Generated (MWH):

j0.0 719.0l 796,269 2,879.0 00 135,588.6 0.0 3,183,170l 140,389,469 1

Enclosure 2 PG&E Letter DCL-03-053 UNIT SHUTDOWNS DOCKET NO.: 50-275 UNIT NAME: Diablo Canyon Unit 1 DATE: 05/01/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: April 2003 NO. DATE TYPE DURATION REASON' METHOD CAUSE & CORRECTIVE (YMMDD) F (Forced) (HOURS) OF ACTIONS S (Scheduled) SHUTTING COMMENTS 2

DOWN 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) 2

Enclosure 2 PG&E Letter DCL-03-053 OPERATING DATA REPORT DOCKET NO.: 50-323 UNIT NAME: Diablo Canyon Unit 2 DATE: 05/01/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: April 2003 I 1. Design Electrical Rating (MWe - Net): l 1119 l

2. Maximum Dependable Capacity (MWe - Net): l 1087 1 This Month YTD Cumulative

3. Number of Hours Reactor Critical: 468.0 1,410.4 132,768.9

4. Number of Hours Generator On-Line: 445.2 1,345.2 131,233.1

5. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

6. Net Electrical Energy Generated (MWH): 399,723 1,295,826 137,987,816 3

Enclosure 2 PG&E Letter DCL-03-053 UNIT SHUTDOWNS DOCKET NO.: 50-323 UNIT. NAME: Diablo Canyon Unit 2 DATE: 05/01/2003 COMPLETED BY: L. M. Parker TELEPHONE: (805) 545-3386 REPORT MONTH: April 2003 NO. DATE TYPE DURATION REASON 1 METHOD CAUSE & CORRECTIVE MMDD) F(Forced) (HOURS) OF SHUTTING ACTIONS COMMENTS (YYMMDD)S(Scheduled)

DOWN 3 030404 F 273.8 D 1 Technical Specification required manual shutdown in response to the discovery of an AFW check valve with internals installed incorrectly.

'Reference NRC Event Number 39735, LER 2-2003-005. The valve was replaced with a different model.

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