ML20248L619

Forwards SER for EPRI Proprietary Rept TR-105873, BWR Vessel & Internals Project,Evaluation of Crack Growth in BWR Stainless Steel Internals (BWRVIP-14),dtd March 1996

ML20248L619
Person / Time
Issue date:	06/08/1998
From:	Lainas G NRC (Affiliation Not Assigned)
To:	Terry C NIAGARA MOHAWK POWER CORP.
Shared Package
ML20248L620	List: ML20248L619 ML20248L633
References
TAC-M94975, NUDOCS 9806110271
Download: ML20248L619 (4)

Text

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NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20666-0001

\.....lt June 8,1998

Carl Teny, BWRVIP Chairman Niagara Mohawk Power Com;any Post Office Box 63 Lycoming, NY 13093

SUBJECT:

SAFETY EVALUATION OF THE BWR VESSEL AND INTERNALS PROJECT BWRVIP-14 REPORT (TAC NO. M94975)

Dear Mr. Terry,

By letter dated March 18,1996, as supplemented by Ic'ter dated July 28,1997, the Boiling Water Reactor Vec ~ l and Intemals Project (BWRVIP) submitted the Ele:tric Power Research Institute (EPRI) Proprlctary Report TR 105873, "BWR Vessel and Interrests Project, Evaluation of Crack Growtn in BWH Stainless Steel Internals (BWRVIP-14)," datet, March 1996, for staff review and approval. The staff requested additional information (RAl) in a letter dated December 9,1996, and the BWRVIP provided its response Structural Integrity Associates Report No. SIR 97-025, Revision 3, " Responses to NRC Request for Additional information on {

i BWRVIP Report BWRVIP-14 on Evaluation of Crack Growth in RPV Intemals," dated June j 1997, by letter dated July 28,1997.

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The BWRVIP-14 report provides a methodology for assessment of crack growth in BWR stainless steel shrouds and other stainless steel intemals components. The assessment was limited to the circumferential welds of the shroud where most of the reported intergranular stress corrosion cracking (IGSCC) has occurred to date. The methodology was developed specifically  ;

for crack growth in the radial (through thickness drection). Residual and applied stresses and stress intensity factc:a (K) have been developed for crack propagation in this direction.

l The NRC staff has reviewed the BWRVIP-14 report and finds, in the enclosed Safety Evaluation (SE), that the three approaches described in the BWRVIP-14 report for the evaluation of crack growf' are eceptable for use except where the staff's conclusions differ from the BWRVIP's, as discussed in the enclosed SE. This finding is based on information submitted both orig!nally and in response to the staff's request for additional information (RAI), dated December 9,1996, that clarified the guidance in BWRVIP-14. The staff requests that the BWRVIP review and resolve the issues raised in the enclosed SE, and incorporate the staff's conclusions into a revised BWRVIP-14 report. Please inform the staff within 90 days of the date of this letter as to your proposed actions and schedule for such a revision.

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'i Carl Terry- .

Please contact C. E. (Gene) Carpenter, Jr., of my staff at (301) 415-2169 if you have any

' further questions regarding this subiect.

Sincerely, Originalsigne;dby Gus C. Lainas, Acting Director Division of Engineering Office of Nuclear Reactor Regulation

Enclosure:

As stated cc: See next page Distribution:

SJCollins/FJMiraglia LCShao/MEMayfield ACRS BWSheron EMCB/RF - Regions BABoger File Cen,er PUBLIC DE/RF DOCUMENT NAME: G:\BWRVIP\BWRVIP14.SER jf To receive a copy of this document, indicate in the 14d: *C" = Copy N" = No copy EMCB:ME C EMCB: LPM C EL (QB: /[ C EMCB:SLS C HFConrad CECarpenter au a [a RAHermanrth uw O2/ /1998 02//31996 O M 998 02/)?I998 EMCB:(A)BC C DE:(A)DD .. C Qd(A)D - C C~

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OFNCIAL RECORD COPY 4

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._______-_____ O

CarlTerry .

Please contact C. E. (Gene) Carpenter, Jr., of my staff at (301) 415-2169 if you have any further questions regarding this subject.

Sincerely, N

Gus C. Lainas, Acting Director Division of Engineering Office of Nuclear Reactor Regulation

Enclosure:

As stated cc: See next page

cc:

George Jones, Executive Chairman Dana Covill, Technical Chairman BWRtlP Assessment Task BWRVIP Assessment Yask Pennsylvania Power & Light GPU Nuclear

' A6-1 1 Upper Pond Road Two North Ninth Street . Parsippany, NJ 07054 Allentown, PA 18101 Jos Hagan, Executive Chairman Carl Larsen, Technical Chairman BWRVIP Inspection Task BWRVIP inspection Task Entergy Yankee Atomic P. O. Box 756 580 Main Street Waterloo Road Bolton, MA 0'l740

' Port Gibson, MS 39150 Paul Bemis, Executive Chairman Vaughn Wagoner, Technical Chairman BWRVIP Integration Task BWRVIP Integration Task Washington Public Power Supply System Carolina Power & Light Compans/

- P. O. Box 968 One Hannover Square 9C1 North Power Plant Loop P.O. Box 1551 Richland, WA 99352-0968 Raleigh, NC 27612 Lewis Sumner, Executive Chairman John Wilson, Technical Chairman BWRVIP Mitigation Task BWRVIP Mitigation Task Southern Nuclear Operating Co. Public Service Electric & Gas Co.

40 Inverness Center Parkway N5'i Birmingham, AL 35201 Post Office Box 236 Hancocks Bridge, NJ 08038 John Blomgren, Executive Chairman Bruce McLeod, Technical Chairman BWRVIP Repair Task BWRVIP Repair Task Commonwealth Edison Co. Southern Nuclear Operating Co.

- 1400 Opus Place, Suite 600 Post Office Box 1295

- Downers Grove, IL 60515 5701 40 Inverness Center Parkway Birmingham, AL 35201 Bill Campbell, BWRVIP Vice Chairman Warren Bilanin, EPRI BWRVIP Carolina Power & Light Integration Manager P. O. Box 1551 Joe Gilman, EPRI BWRVIP Raleigh, NC 27612 Mitigation Man 3ger Ken Wolfe, EPRI BWRVIP

. Robert Carter, EPRI BWRVlP Repair Manager l

Assessment Manager Electric Power Research Institute Greg Selby, EPRI BWRVIP P. O. Box 10412 Inspection Manager 3412 Hillview Ave.

EPRI NDE Center ' Palo Alto, CA 94303 P. O. Box 217097 1300 W. T. Harrie Blvd.

Charlotte, NC 26221

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