ML022530438
| 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 RHernan EBrown BClayton SWeerakody BMozafari for 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 Nuclear Operations Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. James E. Maddox, Acting Vice President Engineering & Technical Services Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Richard T. Purcell Site Vice President Sequoyah Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Soddy Daisy, TN 37379 General Counsel Tennessee Valley Authority ET 11A 400 West Summit Hill Drive Knoxville, TN 37902 Mr. Robert J. Adney, General Manager Nuclear Assurance Tennessee Valley Authority 6A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801 Mr. Mark J. Burzynski, Manager Nuclear Licensing Tennessee Valley Authority 4X Blue Ridge 1101 Market Street Chattanooga, TN 37402-2801 Mr. Pedro Salas, Manager Licensing and Industry Affairs Sequoyah Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Soddy Daisy, TN 37379 Mr. D. L. Koehl, Plant Manager Sequoyah Nuclear Plant Tennessee Valley Authority P.O. Box 2000 Soddy Daisy, TN 37379 Senior Resident Inspector Sequoyah Nuclear Plant U.S. Nuclear Regulatory Commission 2600 Igou Ferry Road Soddy Daisy, TN 37379 Mr. Lawrence E. Nanney, Director Division of Radiological Health Dept. of Environment & Conservation Third Floor, L and C Annex 401 Church Street Nashville, TN 37243-1532 County Executive Hamilton County Courthouse Chattanooga, TN 37402-2801 Ms. Ann P. Harris 341 Swing Loop Road Rockwood, Tennessee 37854