ML080910012

Request for Additional Information, Response to Generic Letter 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation During Design Basis Accidents at Pressurized-Water Reactors

ML080910012
Person / Time
Site:	Watts Bar
Issue date:	03/31/2008
From:	Milano P Plant Licensing Branch III-2
To:	Bhatnagar A Tennessee Valley Authority
Milano P, NRR/DORL/LPLA, 415-1457
References
TAC MD6726
Download: ML080910012 (4)

Text

March 31, 2008 Mr. Ashok S. Bhatnagar Senior Vice President Nuclear Generation Development and Construction 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801

SUBJECT:

WATTS BAR NUCLEAR PLANT (WNP), UNIT 2 - REQUEST FOR ADDITIONAL INFORMATION REGARDING RESPONSE TO GENERIC LETTER 2004-02, POTENTIAL IMPACT OF DEBRIS BLOCKAGE ON EMERGENCY RECIRCULATION DURING DESIGN BASIS ACCIDENTS AT PRESSURIZED-WATER REACTORS (TAC NO. MD6726)

Dear Mr. Bhatnagar:

By letter to the Nuclear Regulatory Commission (NRC) dated September 7, 2007 (Agencywide Documents Access and Management System Accession No. ML072570676), Tennessee Valley Authority (TVA) submitted its initial responses to several Bulletins and Generic Letters for the Watts Bar Nuclear Plant, Unit 2 (WBN 2). In particular, TVA provided information regarding Generic Letter (GL) 2004-02, Potential Impact of Debris Blockage on Emergency Recirculation during Design Basis Accidents at PWRs, and Bulletin 03-01, Potential Impact of Debris Blockage on Emergency Sump Recirculation.

The NRC staff is reviewing your submittal and has determined that additional information is needed to complete its review. Specifically, the staff requests that TVA provide the following information:

In its response for GL 2004-02, TVA indicates that the WBN 2 steam generators (SGs) are coated. Describe the coating material on the SGs, and state whether the coating material is qualified for design-basis accident conditions. Also, does TVA intend to leave the coating on the SGs?

A. Bhatnagar This request for additional information was discussed with members of your staff, and it was agreed that a response would be provided by May 15, 2008. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-1457.

Sincerely,

/RA/

Patrick D. Milano, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-391 cc: See next page

A. Bhatnagar This request for additional information was discussed with members of your staff, and it was agreed that a response would be provided by May 15, 2008. If circumstances result in the need to revise the requested response date, please contact me at (301) 415-1457.

Sincerely,

/RA/

Patrick D. Milano, Senior Project Manager Plant Licensing Branch III-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket No. 50-391 cc: See next page DISTRIBUTION:

PUBLIC WB2SPB R/F RidsNrrDorlLwspb RidsNrrPMPMilano RidsNrrLABClayton (Hard Copy)

RidsNrrDciCsgb J. Burke, NRR RidsAcrsAcnw&mMailCenter RidsOgcRp RidRgn2MailCenter ADAMS Accession Number: ML080910012 OFFICE LWBSPB/PM LWBSPB/LA DCI/CSGB/BC LWBSPB/BC NAME PMilano BClayton AHiser LRaghavan DATE 03/31/08 03/ 31 /08 11/09/07 03/ 31 /07 OFFICIAL RECORD COPY

Ashok S. Bhatnagar Tennessee Valley Authority WATTS BAR NUCLEAR PLANT, UNIT 2 cc:

Mr. Gordon P. Arent Mr. John C. Fornicola, General Manager New Generation Licensing Manager Nuclear Assurance Tennessee Valley Authority Tennessee Valley Authority 5A Lookout Place 3R Lookout Place 1101 Market Street 1101 Market Street Chattanooga, TN 37402-2801 Chattanooga, TN 37402-2801 Mr. Masoud Bajestani, Vice President General Counsel Watts Bar Unit 2 Tennessee Valley Authority Watts Bar Nuclear Plant 6A West Tower Tennessee Valley Authority 400 West Summit Hill Drive P.O. Box 2000, EQB 1B Knoxville, TN 37902 Spring City, TN 37381 Mr. Michael J. Lorek, Plant Manager Senior Resident Inspector, Unit 2 Watts Bar Nuclear Plant Watts Bar Nuclear Plant Tennessee Valley Authority U.S. Nuclear Regulatory Commission P.O. Box 2000 1260 Nuclear Plant Road Spring City, TN 37381 Spring City, TN 37381 Mr. Lawrence E. Nanney, Director Mr. Michael K. Brandon, Manager Tennessee Dept. of Environmental Health &

Licensing and Industry Affairs Conservation Watts Bar Nuclear Plant Division of Radiological Health Tennessee Valley Authority 3rd Floor, L&C Annex P.O. Box 2000 401 Church Street Spring City, TN 37381 Nashville, TN 37243-1532 Mr. William R. Campbell, Jr. Mr. Larry E. Nicholson, General Manager Chief Nuclear Officer and Performance Improvement Executive Vice President Tennessee Valley Authority Tennessee Valley Authority 4X Blue Ridge 3R Lookout Place 1101 Market Street 1101 Market Street Chattanooga, TN 37402-2801 Chattanooga, TN 37402-2801 County Executive 375 Church Street Suite 215 Dayton, TN 37321 County Mayor P. O. Box 156 Decatur, TN 37322