ML13024A169

Request for Additional Information

ML13024A169
Person / Time
Site:	Hatch
Issue date:	01/28/2013
From:	Martin R Plant Licensing Branch II
To:	Pierce C Southern Nuclear Operating Co
Martin, R E
References
TAC ME9005, TAC ME9004
Download: ML13024A169 (3)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555"()001 January 28, 2013 Mr. Chuck R Pierce Regulatory Affairs Director Southern Nuclear Operating Company, Inc.

Post Office Box 1295, Bin - 038 Birmingham, AL 35201-1295

SUBJECT:

EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. ME9004 AND ME9005)

Dear Mr. Ajluni:

By letter dated July 5, 2012 (Agencywide Documents Access and Management System Accession No. ML12188A721, Southern Nuclear Operating Company, Inc. (SNC, the licensee),

submitted a license amendment request to change the Technical Specification to revise the minimum water level in the plant service water pump well. Upon reviewing SNC's November 13,2012 letter providing responses to requests for additional information, the U.S.

Nuclear Regulatory Commission staff finds that additional information in the balance-of-plant area is needed as set forth in the enclosure. These requests were discussed with your staff on January 24, 2013.

Please provide the additional information within thirty (30) days of the date of this letter.

Sincerely,

~;n~

. Robert E. Martin, Senior Project Manager Plant Licensing Branch 11-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv

REQUEST FOR ADDITIONAL INFORMATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 SOUTHERN NUCLEAR OPERATING COMPANY Upon reviewing Southern Nuclear Operating Company's (SNC's, the licensee) November 13, 2012 letter providing responses to the staff's request for additional information letter dated October 15, 2012, the following issues need to be addressed:

1. The minimum water level for the Plant Service Water pumps is stated to be 59.1 feet conSidering a 4500 gallon per minute (gpm) flow rate. SNC procedures call for reducing pump flow to not exceed 7000 gpm when level is less than 61.2 feet. SNC provided no assurance that flow has been reduced to 4500 gpm although it is stated that only 4428 gpm is required for shutdown cooldown. Please clarify.

2. The minimum water level for the residual heat removal service water (RHRSW) pumps is stated to be 59.8 feet, yet drawings S-56317 and S-60315 state the minimum water level is 60.5 feet. Drawing S-56317 lists a minimum submergence of 35 inches for a flow rate of 4000 gpm. Apparently SNC used 35 inches for a flow rate of 4400 gpm? If so, why is 59.8 feet the minimum water level for the RHRSW pumps considering that the drawings indicate 60.5 feet and the actual flow rate is 4400 gpm versus 4000 gpm?

3. The minimum stated water level for the standby service water pump is 60.0 feet which considers an 850 gpm flow rate and 1.0 foot minimum submergence. However, drawing SX-24108 lists 1.0 foot as the minimum submergence for a flow rate of 700 gpm, If the standby service water pump is delivering 850 gpm and SNC's calculation used a minimum submergence of 1.0 foot, why is 60.0 feet the minimum water level for the standby service water pumps?

January 28, 2013 Mr. Chuck R. Pierce Regulatory Affairs Director Southern Nuclear Operating Company, Inc.

Post Office Box 1295, Bin - 038 Birmingham, AL 35201-1295

SUBJECT:

EDWIN I. HATCH NUCLEAR PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION (TAC NOS. ME9004 AND ME9005)

Dear Mr. Ajluni:

By letter dated July 5,2012 (Agencywide Documents Access and Management System Accession No. ML12188A721, Southern Nuclear Operating Company, Inc. (SNC, the licensee),

submitted a license amendment request to change the Technical Specification to revise the minimum water level in the plant service water pump well. Upon reviewing SNC's November 13, 2012 letter providing responses to requests for additional information, the U.S.

Nuclear Regulatory Commission staff finds that additional information in the balance-of-plant area is needed as set forth in the enclosure. These requests were discussed with your staff on January 24, 2013.

Please provide the additional information within thirty (30) days of the date of this letter.

Sincerely, IRA!

Robert E. Martin, Senior Project Manager Plant Licensing Branch 1/-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-321 and 50-366

Enclosure:

Request for Additional Information cc w/encl: Distribution via Listserv DISTRIBUTION:

PUBLIC LPL2-1R/F RidsNrrDorlLpl2-1 Resource RidsAcrsAcnw_MailCTR Resource RidsNrrDorlDpr Resource RidsRgn2MailCenter Resource RidsNrrLASFigueroa Resource RidsOgcRp Resource GPurciarello, NRR GCasto, NRR RidsNrrPMHatch Resource ADAMS Accession No.: ML13024A169

• Via email OFFICE DORULPL2-1/PM DORULPL2-1/LA DLR/RERBIIBC* DORULPL2-1/BC DORULPL2-1/PM NAME RMartin SFigueroa (sf) GCasto RPascarelii RMartin DATE 01/28/13 01/24/13 01/17/13 01/28/13 01/28/13 OFFICIAL RECORD COpy