ML20073F931

Suppls 881130 & 910228 Responses to Generic Ltr 88-11 Re NRC Position on Radiation Embrittlement of Reactor Vessel Matls & Impact on Plant Operations.Tech Spec Revs to Address Issue Will Be Submitted by 911004

ML20073F931
Person / Time
Site:	Browns Ferry
Issue date:	04/30/1991
From:	Wallace E TENNESSEE VALLEY AUTHORITY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
GL-88-11, NUDOCS 9105030068
Download: ML20073F931 (3)

Text

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/(PR 301991 U.S. Nuclear Regulatory Commission ATTN:

Document Control Desk Washington, D.C.

20555 Centlemen:

In the Matter of

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Docket Nos. 50-259 Tennessee Valley Authority

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50-260 50-296 BROWNS FERRY NUCLEAR PLANT (BFN) - TVA SUPPLEMENTAL RESPONSE TO CENERIC LETTER (GL) 88-11, NRC POSITION ON RADIATION EMBRITTLEMENT OF REACTOR VESSEL KATERIALS AND ITS IMPACT ON PLANT OPERATIONS

References:

1.

Generic Letter 88-11, dated July 12, 1988, "NRC Position on Radiation Embrittlement of Reactor Vessel Material and Its Impact on plant Operations" 2.

TVA Response to Gencele Letter 88-11, dated November 30, 1988 3.

TVA Supplemental Response to Generic Letter 88-11, dated February 28, 1991 This-correspondence provides a change to TVA's schedule for submitting revised pressure-temperature (P-T) limits for BFN Technical Specifications (TS) using the methodology of Revision 2 to Regulatory Guide (RG) 1.99, Radiatlon Embrittlement of Reactor Vessel Materials.

Reference 1, requested licensees submit a technical analysis and a proposed schedule for action. The CL stated tho schedule was negotiable provided actions would be completed within two plant outages af ter the effectivo date of Revision 2 to RG 1.99.

Reference 2, provided TVA's response to GL 88-11.

The technical analysis concluded that for BFN Units 2 and 3 the current TS are bounding with respect to pressure / temperature limits determined using the RG 1.99, Revision 2 methodology.

For BFN Unit 1, the current TS is not bounding with respect to PT limito determined using the Revision 2 methodology.

Units 2 and 3 will be bounded by the present TS until approximately ten effective full power years (EFPY), which is expected to carry the unlts (h

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- 23 U.,8. Nuclear Regulatory Commission APR 301991 through_two additional cycles._ Units 2 and-3 have'more operating margin w

than-Unit ='. because.the most limiting wold in those' reactor vessels has less copper and nickel-content, and a lower initial nil-ductility-transition temperature.

All'three.BFN units are currently shutdown. Units 1 and 3 are on administrative hold with restart dates to be determined. TVA's response to GL 88-11 committed to submit revisions to the BFN TS by March 1, 1991.

At the~ timo of the response to the OL, TVA anticipated restart of Unit 2 in 1989. -The GL 88-11 schedule was based on submittal of the TS revision after Unit 2 restart.1 TVA anticipates Unit 2 will restart in May 1991.

Accordingly, the schedulo for submittal of these TS revisions is being changed. TVA will submit these TS revisions by October 4, 1991.

This correspondence changes the schedule.for an exlsting commitment. No new' commitments.are-contained in this correspondenco.

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If you have any questions,.please telephone Patrick P. Carter at (205)-729-3566.

,Vory trulyjyours, TENNESSEE VALLEY AUTHORITY ttA,,,

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Nuclear Licensing and

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- Rockville, Maryland :20852

'Mr. Gary Daly, Chairman Limestone County Commission

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LAthens.' Alabama 35611 h

Dr. C. E.' Fox l,-

State Health Officer

. State' Department of Public Health State 0ffice Building-Montgomery,-Alabama 36194 1Mr. J. E. Jones

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- General Electric Company 735 Broad Street; 1

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~_ Chattanooga; TennesseeL 37402

'WRC Resident Inspector-Browns; Ferry Nuclear Plant' RouteL12,-Box 637-

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Mc'_Thierry M. Ross, Project Manager U.S. Nuclear Regulatory Commlnsion One' White Flint, North

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Rochville,' Maryland 120852

' Mr. B. A.'. Wilson,l ProjectfChlef'-

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