ML021330298

April 2002 Monthly Operating Report for Edwin I. Hatch, Units 1 and 2

ML021330298
Person / Time
Site:	Hatch
Issue date:	05/07/2002
From:	Sumner H Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
HL-6241
Download: ML021330298 (7)

Text

Lewis Sumner Southern Nuclear Vice President Operating Company, Inc.

Hatch Project Support 40 Inverness Parkway Post Office Box 1295 Birmingham, Alabama 35201 Tel 205.992.7279 Fax 205 992.0341 SOUTHERN COMPANY May 7, 2002 Energy to Serve Your World Docket Nos. 50-321 50-366 HL-6241 U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555 Edwin I. Hatch Nuclear Plant Monthly Operating Reports Ladies and Gentlemen:

Enclosed are the April 2002 Monthly Operating Reports for Edwin I. Hatch Nuclear Plant Unit 1, Docket No. 50-32 1, and Unit 2, Docket No. 50-366. These reports are submitted in accordance with Technical Specifications 5.6.4.

Respectfully submitted, H. L. Sumner, Jr.

IFL/eb

Enclosures:

1. April Monthly Operating Report for Plant Hatch Unit 1

2. April Monthly Operating Report for Plant Hatch Unit 2 cc: Southern Nuclear Operating Company Mr. P. H. Wells, Nuclear Plant General Manager SNC Document Management (R-Type A02.001)

U. S. Nuclear Regulatory Commission, Washington D. C.

Mr. L. N. Olshan, Project Manager - Hatch U. S. Nuclear Regulatory Commission, Region II Mr. L. A. Reyes, Regional Administrator Mr. J. T. Munday, Senior Resident Inspector - Hatch Utility Data Institute, Inc.

Ms. Barbara Lewis - McGraw-Hill Companies

Enclosure 1 Plant Hatch Unit 1 Monthly Operating Report April 2002 Table of Contents Page Operating Data Report El-i Unit Shutdowns and Power Reductions El-2

OPERATING DATA REPORT Docket No.: 50-321 Unit Name: E. I. Hatch Unit 1 Date: May 1, 2002 Completed By: S. B. Rogers Telephone: (912) 367-7781 x2279 Operating Status

1. Reporting Period: APRIL 2002

2. Design Electrical Rating (Net MWe): 870

3. Maximum Dependable Capacity (Net MWe): 856 This Month Year To Date Cumulative

4. Number of Hours Reactor Was Critical: 254.4 2,105.8 184,620.2

5. Hours Generator On Line: 189.2 2,015.6 178,709.2

6. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

7. Net Electrical Energy Generated: 141,137 1,670,173 129,574,310 CHALLENGES TO MAIN STEAM SAFETY / RELIEF VALVES Date ITag No. IEvent Description __________ ______ _________

No challenges this month.

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UNIT SHUTDOWNS Docket No.: 50-321 Unit Name: E. I. Hatch Unit 1 Date: May 1,2002 Completed By: S. B. Rogers Telephone: (912) 367-7781 x2279 Reporting Period: APRIL 2002 Type i Method of F: Forced Duration Shutting Cause/Corrective Actions No. Date S: Scheduled (Hours) Reason (1) Down (2) Comments02-002 020323 S 529.8 C 4 The 20th Refueling Outage continued.

(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 E-Operator Training/License Examination 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H-Other (Explain)

CAUSEICORRECTIVE ACTION/COMMENTS:

NARRATIVE REPORT Activities associated with the 20th Refueling Outage continued into the month of April. Shift began fuel shuffle on 4/5/02 and the shuffle was completed on 4/10/02. Shift began withdrawing control rods for unit startup on 4/18/02 and brought the reactor critical later the same day. Power ascension was halted at approximately 18.5%

of rated on 4/19/02 to perform Safety Relief Valve (SRV) testing. Testing of the "J" SRV was unsuccessful.

Power was reduced to approximately 14% while an investigation of the "J"SRV was conducted. Shift resumed power ascension later on 4/19/02. The unit experienced an increase in drywell floor drain leakage prior to reaching 20% of rated thermal power. Shift began reducing power in preparation for a unit shutdown to investigate and repair the source of the floor drain leakage. Shift inserted a manual scram on 4/19/02 with the unit at approximately 9.5% of rated thermal power. Investigation revealed the source of the floor drain leakage, to be the "J" SRV tailpipe vacuum breaker. The "J"SRV and tailpipe vacuum breaker were replaced.

Shift began withdrawing control rods for unit startup on 4/22/02 and brought the reactor critical later the same day. Shift increased power to approximately 15% of rated and successfully tested the "J" SRV. Shift later reduced power to approximately 9.5% of rated on 4/22/02 to facilitate the repair of duct work on a drywell cooler.

Shift tied the Main Generator to the grid on 4/23/02 and began power ascension. The unit attained approximately 99.2% of rated thermal power on 4/24/02. Shift began reducing load to approximately 700 GMWe (-2155 CMWT) on 4/25/02 to perform a rod pattern adjustment. Shift began power ascension on 4/26/02 and the unit attained rated thermal power later that day. Shift reduced load to approximately 855 GMWe (-2570 CMWT) on 4/27/02 to perform control rod drive exercises. The unit was returned to rated thermal power later the same day.

Shift maintained unit operation at rated thermal power for the remainder of the month.

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Enclosure 2 Plant Hatch Unit 2 Monthly Operating Report April 2002 Table of Contents Page Operating Data Report E2-1 Unit Shutdowns and Power Reductions E2-2

OPERATING DATA REPORT Docket No.: 50-366 Unit Name: E. I. Hatch Unit 2 Date: May 1, 2002 Completed By: S. B. Rogers Telephone: (912) 367-7781 x2279 Operating Status

1. Reporting Period: APRIL 2002

2. Design Electrical Rating (Net MWe): 894

3. Maximum Dependable Capacity (Net MWe): 870 This Month Year To Date Cumulative

4. Number of Hours Reactor Was Critical: 719.0 2,683.6 160,786.2

5. Hours Generator On Line: 719.0 2,663.8 156,438.9

6. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

7. Net Electrical Energy Generated: 626,992 2,324,493 115,519,109 CHALLENGES TO MAIN STEAM SAFETY / RELIEF VALVES TagtNo No.

Tag No. Event Description Date Tag Event Description No challenges this month.

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UNIT SHUTDOWNS Docket No.: 50-366 Unit Name: E. I. Hatch Unit 2 Date: May 1, 2002 Completed By: S. B. Rogers Telephone: (912) 367-7781 x2279 Reporting Period: APRIL 2002 Type Method of i F Forced Duration Shutting Cause/Corrective Actions No. Date S: Scheduted (Hours) Reason (1) Down (2) Comments No unit shutdowns occurred 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 E-Operator Training/License Examination 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H-Other (Explain) B-Mantennceor -ManalTst rip/cra CAUSE/CORRECTIVE ACTION/COMMENTS:

NARRATIVE REPORT Unit 2 began the month of April operating at rated thermal power. Shift reduced load to approximately 680 GMWe (-2070 CMWT) on 4/7/02 to perform a control rod sequence exchange, scram time testing, and turbine control valve testing. Shift further reduced load to approximately 500 GMWe (-1565 CMWT) on 4/7/02 to perform maintenance activities in the Condenser Bay. The fans on the Helper Cooling Tower were also removed from service while at reduced load, to facilitate the re-routing of the main power supply cable.

Shift returned the unit to rated thermal power on 4/8/02. The Helper Cooling Tower fans were returned to service later the same day. Shift reduced load to approximately 895 GMWe (-2685 CMWT) on 4/27/02 to perform turbine stop valve testing. The unit was returned to rated thermal power later the same day. Shift maintained unit operation at rated thermal power for the remainder of the month.

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