ML022530438

Request for Additional Information on Technical Specification Change No. 01-04, Revised Ice Weight

ML022530438
Person / Time
Site:	Sequoyah
Issue date:	09/06/2002
From:	Hernan R NRC/NRR/DLPM/LPD2
To:	Scalice J Tennessee Valley Authority
Hernan R W, NRR/NRC/DLPM,301-415-2010
References
TAC MB3682, TAC MB3683
Download: ML022530438 (4)

Text

September 6, 2002 Mr. J. A. Scalice Chief Nuclear Officer and Executive Vice President Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801

SUBJECT:

SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 - REQUEST FOR ADDITIONAL INFORMATION ON TECHNICAL SPECIFICATION CHANGE NO. 01-04, REVISED ICE WEIGHT (TAC NOS. MB3682 and MB3683)

Dear Mr. Scalice:

By letter dated August 12, 2001, the Tennessee Valley Authority requested revision to the Sequoyah Nuclear Plant (SQN), Units 1 and 2, ice condenser total ice weight as specified in SQN Technical Specification 3/4.6.5. The proposed change would increase the total ice weight from 2,082,024 pounds to 2,225,880 pounds, and is being requested to correct a computer modeling input error identified by Westinghouse Electric Company. The U.S. Nuclear Regulatory Commission staff has reviewed your submittal and 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 September 3 and 5, 2002, and it was agreed that a response would be provided by September 16, 2002.

Please have your staff contact Eva Brown at (301) 415-2315 if there are any questions regarding the enclosed request.

Sincerely,

/RA by EBrown for/

Ronald W. Hernan, Senior Project Manager, Section 2 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-327 and 50-328

Enclosure:

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

ML022530438 OFFICE PDII-2\PM PDII-2\PM PDII-2\LA SPSB\SC PDII-2\SC NAME EBrown for EBrown BClayton SWeerakody BMozafari for RHernan KJabbour DATE 9/5/02 9/5/02 9/5/02 9/5/02 9/5/02 REQUEST FOR ADDITIONAL INFORMATION PROPOSED TECHNICAL SPECIFICATION AMENDMENT TO INCREASE OF THE ICE CONDENSER TOTAL ICE WEIGHT SEQUOYAH NUCLEAR PLANT, UNITS 1 AND 2 DOCKET NOS. 50-327 AND 50-328 1] What is the significance of the containment spray switchover interval (156 seconds)?

2] Explain the importance of maintaining the current time interval (156 seconds) between the containment spray switchover time and ice bed meltout time.

3] What is done to ensure that the heat transfer coefficient (UA) value of the containment spray heat exchanger is maintained?

4] What was the value assumed in the original analysis for ultimate heat sink temperature?

Mr. J. A. Scalice SEQUOYAH NUCLEAR PLANT Tennessee Valley Authority cc:

Mr. Karl W. Singer, Senior Vice President Mr. Pedro Salas, Manager Nuclear Operations Licensing and Industry Affairs Tennessee Valley Authority Sequoyah Nuclear Plant 6A Lookout Place Tennessee Valley Authority 1101 Market Street P.O. Box 2000 Chattanooga, TN 37402-2801 Soddy Daisy, TN 37379 Mr. James E. Maddox, Acting Vice President Mr. D. L. Koehl, Plant Manager Engineering & Technical Services Sequoyah Nuclear Plant Tennessee Valley Authority Tennessee Valley Authority 6A Lookout Place P.O. Box 2000 1101 Market Street Soddy Daisy, TN 37379 Chattanooga, TN 37402-2801 Senior Resident Inspector Mr. Richard T. Purcell Sequoyah Nuclear Plant Site Vice President U.S. Nuclear Regulatory Commission Sequoyah Nuclear Plant 2600 Igou Ferry Road Tennessee Valley Authority Soddy Daisy, TN 37379 P.O. Box 2000 Soddy Daisy, TN 37379 Mr. Lawrence E. Nanney, Director Division of Radiological Health General Counsel Dept. of Environment & Conservation Tennessee Valley Authority Third Floor, L and C Annex ET 11A 401 Church Street 400 West Summit Hill Drive Nashville, TN 37243-1532 Knoxville, TN 37902 County Executive Mr. Robert J. Adney, General Manager Hamilton County Courthouse Nuclear Assurance Chattanooga, TN 37402-2801 Tennessee Valley Authority 6A Lookout Place Ms. Ann P. Harris 1101 Market Street 341 Swing Loop Road Chattanooga, TN 37402-2801 Rockwood, Tennessee 37854 Mr. Mark J. Burzynski, Manager Nuclear Licensing Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801