ML023180058

October 2002 Monthly Operating Report for Edwin I. Hatch Units 1 & 2

ML023180058
Person / Time
Site:	Hatch
Issue date:	11/05/2002
From:	Sumner H Southern Nuclear Operating Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
HL-6321
Download: ML023180058 (8)

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 WA COMPANY Energy to Serve Your World' November 5, 2002 Docket Nos. 50-321 50-366 HL-6321 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 October 2002 Monthly Operating Reports for Edwin I. Hatch Nuclear Plant Unit 1, Docket No. 50-321, 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. October Monthly Operating Report for Plant Hatch Unit 1

2. October 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. Joseph Colaccino, Project Manager - Hatch U. S. Nuclear Regulatory Commission, Region I1 Mr. L. A. Reyes, Regional Administrator Mr. J. T. Munday, Senior Resident Inspector - Hatch Utility Data Institute, Inc.

Ms. Barbara Lewis - McGraw-Hill Companies e5

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

OPERATING DATA REPORT Docket No.: 50-321 Unit Name: E. I. Hatch Unit 1 Date: November 1,2002 Completed By: S. B. Rogers Telephone: (912) 366-2000 x2279 Operating Status

1. Reporting Period: OCTOBER 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: 662.1 6,439.9 188,954.3

5. Hours Generator On Line: 627.5 6,315.2 183,008.7

6. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

7. Net Electrical Energy Generated: 526,141 5,354,945 133,259,082 CHALLENGES TO MAIN STEAM SAFETY / RELIEF VALVES (MDate Tag No. Event Description No challenges this month.

El-1

UNIT SHUTDOWNS Docket No.: 50-321 Unit Name: E. I. Hatch Unit 1 Date: November 1, 2002 Completed By: S. B. Rogers Telephone: (912) 366-2000 x2279 Reporting Period: OCTOBER 2002 Type Method of Date F.Forced Duration Shutting Cause/Corrective Actions No. (YYMMDD) S Scheduled (Hours) Reason (1) Down (2) Comments02-003 021010 S 117.5 B 2 Shift inserted a manual scram and manually tripped the main turbine at approximately 48.5% of rated thermal power, following a planned load reduction from rated conditions. The unit was shut down for a planned maintenance outage to replace the "FF", "J", and "L" main steam safety / relief valves.

The safety / relief valves were replaced and the unit was later returned to rated thermal power.

(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)

CAUSE/CORRECTIVE ACTION/COMMENTS:

NARRATIVE REPORT Unit 1 began the month of October operating at rated thermal power. Shift reduced load to approximately 805 GMWe (-2530 CMWT) on October 2 when power was lost to the fans on the Helper Cooling Tower, due to a faulted lightning arrester, and Main Condenser vacuum began to degrade. Power was restored to the cooling tower fans and the unit returned to rated thermal power later the same day. Shift reduced load to approximately 815 GMWe (-2540 CMWT) on October 5 to perform control rod drive exercises and returned the unit to rated thermal power later the same day. Shift reduced power to approximately 48.5% of rated thermal on October 10 then inserted a manual scram and tripped the main turbine to begin a planned maintenance outage, (see description of event 02-003 above for details). Shift began withdrawing control rods and brought the reactor critical on October 14. Shift tied the main generator to the grid on October 15 and began power ascension. The unit attained rated thermal power on October 18. Shift reduced load to approximately 855 GMWe (-2625 CMWT) on October 19 to perform control rod drive exercises and returned the unit to rated thermal power later the same day. Shift reduced load to approximately 865 GMWe (-2650 CMWT) on October 26 to perform control rod drive exercises. Shift then increased power to approximately 98% of rated thermal and performed turbine stop valve testing. The unit was returned to rated thermal power on October 27. Shift maintained unit operation at rated thermal power for the remainder of the month.

El -2

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

OPERATING DATA REPORT Docket No.: 50-366 Unit Name: E. I. Hatch Unit 2 Date: November 1, 2002 Completed By: S. B. Rogers Telephone: (912) 366-2000 x2279 Operating Status

1. Reporting Period: OCTOBER 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: 745.0 7,100.6 165,203.2

5. Hours Generator On Line: 745.0 7,080.8 160,855.9

6. Unit Reserve Shutdown Hours: 0.0 0.0 0.0

7. Net Electrical Energy Generated: 644,486 6,140,540 119,335,156 CHALLENGES TO MAIN STEAM SAFETY / RELIEF VALVES Date Tag No. Event Description MYMMDD) ________________________________

No challenges this month.

E2-1

UNIT SHUTDOWNS Docket No.: 50-366 Unit Name: E. I. Hatch Unit 2 Date: November 1, 2002 Completed By: S. B. Rogers Telephone: (912) 366-2000 x2279 Reporting Period: OCTOBER 2002 Type Method of Date F Forced Duration Shutting Cause/Corrective Actions No. (YYMMDD) S Scheduled (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 b-Regulatory Restriction 4-Continuation E-Operator Training/License Examination 5-Other (Explain)

F-Administrative G-Operational Error (Explain)

H-Other (Explain)

CAUSE/CORRECTIVE ACTION/COMMENTS:

NARRATIVE REPORT Unit 2 began the month of October operating at approximately 95% of rated thermal power with a power ascension in progress. The power ascension began on September 30 following the restart of the Reactor Recirculation Motor Generator Sets, which had tripped earlier that day. The unit attained rated thermal power on October 1. Shift reduced load to approximately 855 GMWe (-2610 CMWT) on October 2 to perform a rod pattern adjustment and returned the unit to rated thermal power later the same day. Shift later reduced load to approximately 830 GMWe (-2540 CMWT) on October 2 when power was lost to the fans on the Helper Cooling Tower, due to a faulted lightning arrester, and Main Condenser vacuum began to degrade. Power was restored to the cooling tower fans and the unit returned to rated thermal power later the same day. Shift reduced load to approximately 860 GMWe (-2640 CMWT) on October 6 to perform control rod drive exercises. The unit was returned to rated thermal power on October 7. Shift reduced load to approximately 390 GMWe (-1245 CMWT) on October 11 when Main Condenser vacuum began to degrade. Shift determined the "A" Steam Jet Air Ejector was not functioning properly, due to an increased water level in the main drain tank. Investigation revealed the condensate supply valves to the drain tank eductor failed to open, causing the increased water level. The valves were opened and the air ejector resumed proper operation. Shift returned the unit to rated thermal power later the same day.

(continued on page E2-2b)

E2-2a

UNIT SHUTDOWNS Docket No.: 50-366 Unit Name: E. I. Hatch Unit 2 Date: November 1, 2002 Completed By: S. B. Rogers Telephone: (912) 366-2000 x2279 Reporting Period: OCTOBER 2002 Type Method of Date F Forced Duration Shutting Cause/Corrective Actions No. (YYMMDD) S Scheduled (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 F-Administrative G-Operational Error (Explain)

H-Other (Explain)

CAUSE/CORRECTIVE ACTION/COMMENTS:

NARRATIVE REPORT Shift reduced load to approximately 870 GMWe (-2645 CMWT) on October 13 to perform control rod drive exercises and turbine stop valve testing. The unit was returned to rated thermal power later the same day.

Shift reduced load to approximately 875 GMWe (-2650 CMWT) on October 20 to perform control rod drive exercises. The unit was returned to rated thermal power on October 21. Shift reduced load to approximately 715 GMWe (-2210 CMWT) on October 25 to perform a rod pattern adjustment. Maintenance activities were also performed in the Condenser Bay while at reduced load. Shift returned the unit to rated thermal power on October 26. Shift reduced load to approximately 870 GMWe (-2625 CMWT) on October 27 to perform control rod drive exercises. The unit was returned to rated thermal power on October 28. Shift maintained unit operation at rated thermal power for the remainder of the month.

E2-2b