ML20137W798

Documents Commitment to Obtain NRC Review & Approval for Reductions in DNBR Initial Transition Core Penalty Below Proprietary Value for Mixed Mark-BW Cores

ML20137W798
Person / Time
Site:	Sequoyah
Issue date:	04/11/1997
From:	Shell R TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9704210003
Download: ML20137W798 (4)

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Tennessee Valley Authority, Post Office Box 2000, Soody-Daisy, Tennessee 37379-2000 l

April 11,1997 l

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U.S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D.C. 20555 Gentlemen: i in the Matter of ) Docket Nos. 50-327 Tennessee Valley Authority ) E' 328 SEQUOYAH NUCLEAR PLANT (SON)- DEPARTURE FROM NUCLEATE BOILING RATIO (DNBR) TRANSITION CORE PENALTY COMMITMENT FOR TECHNICAL SPECIFICATION (TS) CHANGE 96-01 This letter documents a commitment to obtain NRC review and approval for reductions in the DNBR initial transition core penalty below the proprietary value for mixed Mark-BW cores er docketed in our response to NRC's Question 28 da:ed April 6,1997. This commitment will remain in effect until a homogen. ous core of Mark-BW fuelis achieved. This commitment was required by NRC to support approval of TS Change 96-01 as discussed in a telephone call with NRC on April 10,1997.

The enclosure provides the commitment made in this letter.

Please direct questions concerning this issue to Keith Weller at (423) 843-7527. /

Sincerely, /

t R. H. Shell f ph Site Licensing and Industry Affairs Manager /

Enclosure cc: See page 2

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. i U.5. Nuclear Regulatory Commission Page 2 April 11,1997 cc (Enclosure): l Mr. R. W. Hernan, Project Manager

' Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852-2739 NRC Resident inspector Sequoyah Nuclear Plant 2600 Igeu Ferry Road Soddy-Daisy, Tennessee 37379-3624 )

Regional Administrator U.S. Nuclear Regulatory Commission Region ll l 101 Marietta Street, NW, Suite 2900 I

. Atlanta, Georgia 30323-2711 I t

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ENCLOSURE COMMITMENT LISTING l

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. . Commitment TVA will obtain NRC review and approval prior to the startup for any cycle's core that involves a reduction in the departure from nucleate boiling ratio initial transition

! core penalty below the proprietary value for mixed Mark-B'N cores as docketed in i i our response to NRC's Question 28 dated April 6,1997. This commitment will be i

, incorporated into an appropriate procedure by May 30,1997, and will remain in' '

effect until a homogeneous core of Mark-BW fuelis obtained for each unit.

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