ML20005F306
| ML20005F306 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 01/04/1990 |
| From: | Michael Ray TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-79-12, NUDOCS 9001160160 | |
| Download: ML20005F306 (3) | |
Text
- o TENNESSEE VALLEY AUTHORITY CH ATTANOOG A. TENNESSEE 37401 SN 157B Lookout Place JAN 041990 U.S, Nuclear Regulatory Commission ATIN: Document Control Desk Washington, D.C.
20555 Gentlemen:
In the Matter of
)
Docket Nos. 50-259 Tennessee Valley Authority
)
50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - UNITS 1, 2, AND 3 - 0FFICE OF INSPECTION AND ENFORCEMENT BULLETIN 79 COMMITHENT REVISIONS REGARDING FAST PERIOD SCRAMS
References:
1.
Office of Inspection and Enforcement Bulletin 79-12. "Short Period Scrams at BWR Factittles," May 31, 1979 2.
Memorandum from L. M. Mills to J. P. O'Reilly, " Office of Inspection and Enforcement Bulletin 79 RII:JP0 50-259,
-260, -296 - Browns Ferry Nuclear Plant Units 1, 2, and 3,"
July 30, 1979 (A27 790730 011)
I 3.
Memorandum from L. M, Mills to J. P. O'Reilly, " Office of Inspection and Enforcement Bulletin 79 RII:JP0 50-259
-260, -296 - Browns Ferry Nuclear Plant Units 1, 2, and 3,"
August 19, 1981 (A27 810819 018) 4.
NEDO-21231, "GE Licensing Topical Report - Banked Position Withdrawal Sequence,"
C. J. Paone, January 1977 5.
GE SIL No. 316 " Reduced Rod Notch Worth Procedure," November 1979 6.
NRC Letter from Cecil 0. Thomas to J. S. Chariney (GE)
" Acceptance for Referencing of Licensing Topical Report NEDE - 240ll-P-A," GE Standard Appilcation for Reactor fuel Revision 7, Amendment 12, October 11, 1985.
In response to IE Bulletin 79-12 (Reference 1).TVA committed to perform unit
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and cycle-specific analyses of control rod withdrawal sequences in order to
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ensure that rod notch worths were acceptable (References 2 and 3).
Beginning with Unit 2 Cycle 6. TVA will be implementing the generic Banked Position Withdrawal Sequence (BPWS) and Reduced Notch Worth Procedure (RNHP)
(References 4 and 5).
GE has reviewed the Browns Ferry Rod Worth Minimizer groupings used in this wtthdrawal sequence and concluded that the results of the generic BPWS analyses are applicable to Browns Ferry.
In addition, TVA has specifically analyzed this withdrawal sequence to ensure that the notch worths aie sufficiently small so as to minimize the possibility of a fast period scram, iK0
'O An Equal opportunity Employer
'li
' U.S. Nuclear Regulatory Commission JAN 041990 l
t Since the generic BPWS/RNWP has been previously approved for group notch rod sequence control system reactors by NRC (Reference 6), TVA is revising its j
commitments regarding fast period scrams to no longer require cycle and unit specific analyses of rod notch worths.
The enclosure lists the commitment that is contained in this letter.:
Very truly yours, TENNESSEE VALLEY AUTHORITY-
\\w4cqf Manage, Nuclear Li ensing and Regulatory Affairs.
Enclosure cc (Enclosure):
Ms. S. C. Black, Assistant Director for Projects TVA Projects Division U.S. Nuclear Regulatory Commission One White Flint, North 11555 Rockville Pike Rockville, Maryland 20852 Mr. B. A. Wilson, Assistant Director for Inspection Programs TVA Projects Division U.S. Nuclear Regulatory Commission Region II 101 Harletta Street, NW, Suite 2900 Atlanta, Georgia 30323 NRC Resident Inspector Browns Ferry Nuclear Plant Route 12, Box 637 Athens, Alabama 35609-2000
1 4,
3
,... : ' I-Enclosure List of Commitments:
' Commitment: Beginning with Unit 2 Cycle 6.,TVA will implement the Generic.
Banked Position Withdrawal Sequence and the Reduced Notch North' Procedure.
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