ML042330130

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RAI, Alternative Source Term Main Steam Line Indications
ML042330130
Person / Time
Site: Browns Ferry  Tennessee Valley Authority icon.png
Issue date: 08/19/2004
From: Ellen Brown
NRC/NRR/DLPM/LPD2
To: Singer K
Tennessee Valley Authority
Brown E, NRR/DLPM 415-2315
References
TAC MB5733, TAC MB5734, TAC MB5735
Download: ML042330130 (4)


Text

August 19, 2004 Mr. Karl W. Singer Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

BROWNS FERRY NUCLEAR PLANT, UNITS 1, 2 AND 3 REQUEST FOR ADDITIONAL INFORMATION REGARDING ALTERNATIVE SOURCE TERM (TAC NOS. MB5733, MB5734 AND MB5735)

Dear Mr. Singer:

By letter dated July 31, 2002, as supplemented in letters dated December 9, 2002, February 12, March 26, July 11 and 17, 2003, May 17 and July 2, 2004, Tennessee Valley Authority submitted a request to revise the licensing and design basis to reflect the application of the alternative source term (AST) methodology for the Browns Ferry Units 1, 2 and 3. The submittal also requested changes to various technical specifications to reflect the adoption of AST.

Based on our review of your submittal, the Nuclear Regulatory Commission staff finds that a response to the enclosed request for additional information is needed before we can complete the review.

This request was discussed with your staff on August 16, 2004, and it was agreed that a response would be provided within 30 days of the issuance of this letter.

If you have any questions, please contact me at (301) 415-2315.

Sincerely,

/RA/

Eva A. Brown, Project Manager, Section 2 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-259, 50-260 and 50-296

Enclosure:

Request for Additional Information cc w/encl: See next page

ML042330130 NRR-088 OFFICE PDII-2/PM PDII-2/PM PDII-2/LA EMCB/SC EMEB/SC PDII-2/SC(A)

NAME EBrown KJabbour BClayton TChan KManoly MMarshall DATE 8/18/04 8/18/04 8/18/04 8/19/04 8/19/04 8/19/04

Enclosure REQUEST FOR ADDITIONAL INFORMATION ALTERNATIVE SOURCE TERM IMPLEMENTATION TENNESSEE VALLEY AUTHORITY BROWNS FERRY PLANT, UNITS 1, 2, AND 3 DOCKET NOS. 50-259, 50-260, AND 50-296 Recently, several indications were identified in the nonsafety portion of the main steam piping at Browns Ferry Nuclear Plant (BFN), Unit 1. Tennessee Valley Authority has determined that the indications were the result of the manufacturing process of the pipe and not service-induced.

The alternative source term submittal and its supplements did not contain any discussion of these flaws and their potential impact on the structural integrity of that portion of the main steam piping system. Provide your response to the following questions:

1.

At BFN, Unit 1, several indications were identified in the nonsafety portion of the main steam piping. One of the flaws identified showed a reduction in the wall thickness up to 34 percent. Provide a discussion on the impact of these localized reductions in the wall thickness on the existing structural and seismic calculations and how conformance to the existing and proposed licensing basis for that portion of the main steam piping is and will be maintained.

2.

Given that flaws have been found in the main steam piping of Unit 1, discuss what assurances exist that other flaws that represent a 34-percent or greater reduction in wall thickness do not exist, not only on Unit 1, but Units 2 and 3 as well.

Mr. Karl W. Singer BROWNS FERRY NUCLEAR PLANT Tennessee Valley Authority cc:

Mr. Ashok S. Bhatnagar, Senior Vice President Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. James E. Maddox, Vice President Engineering & Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Michael D. Skaggs Site Vice President Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 General Counsel Tennessee Valley Authority ET 11A 400 West Summit Hill Drive Knoxville, TN 37902 Mr. John C. Fornicola, Manager Nuclear Assurance and Licensing Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Kurt L. Krueger, Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Jon R. Rupert, Vice President Browns Ferry Unit 1 Restart Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Robert G. Jones Browns Ferry Unit 1 Plant Restart Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Mr. Mark J. Burzynski, Manager Nuclear Licensing Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Timothy E. Abney, Manager Licensing and Industry Affairs Browns Ferry Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Decatur, AL 35609 Senior Resident Inspector U.S. Nuclear Regulatory Commission Browns Ferry Nuclear Plant 10833 Shaw Road Athens, AL 35611-6970 State Health Officer Alabama Dept. of Public Health RSA Tower - Administration Suite 1552 P.O. Box 303017 Montgomery, AL 36130-3017 Chairman Limestone County Commission 310 West Washington Street Athens, AL 35611