ML20217B355
| ML20217B355 | |
| Person / Time | |
|---|---|
| Issue date: | 09/15/1997 |
| From: | Lainas G NRC (Affiliation Not Assigned) |
| To: | Terry C NIAGARA MOHAWK POWER CORP. |
| Shared Package | |
| ML20217B360 | List: |
| References | |
| FACA, TAC-M94959, NUDOCS 9709240193 | |
| Download: ML20217B355 (5) | |
Text
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,j NUCLEAR REGULATORY COMMISSION WA5HING1ON D.C. 3006H001
< ***** September 15, 1997 i
Carl Terry. BWRVIP Chairman Niagara Mohawk Power Company Post Office Box 63 Lycoming. NY 13093
SUBJECT:
TRANSMITTAL OF NRC sIAFF'S SAFETY EVALUATION OF THE BWR VESSEL AND INTERNALS PROJECT BWRVJP 07 REPORT (TAC NO. M94959)
Dear Mr. Terry,
By letter dated February 2. 1996, as supplemented by letters dated July 17.
May 21. and October 21. 1996, and January 8. 1997. you submitted the Electric Power Research Institute (EPRI) Report TR 105747. BWR, Vessel and Internals Pro;ect. Guidelines for Reins)ectim of BWR Core Shrouds (BWRVIP-07)." for NRC staff review and approval. T1e BV.. VIP-07 report provides a uniform industry approach to reinspection of the BWR core shroud tlat would ensure that the structural and functional integrity would by maintained for either a repaired or unrepaired BWR core shroud.
The NRC staff has reviewed the BWRVIP 07 report and finds in the enclosed Safety Evaluation Report (SER), that the scope of the guidelines is comprehensive, covering circumferential vertical, and ring segment welds, as well as repair components for both Category B and C plants. Industry experience has found that the inspection methodologies - enhanced visual and ultrasonic methods - are a)propriate for finding crackin In addition, the guidance is consistent wit 1 that in earlier staff appro,g.ed reports on the inspection and evaluation of core shrouds. The guidelines of BWRVIP-07 incorporate many of the recommendations in previous safety evaluations and also allow for revision on the basis of new data and lessons learned. The staff. therefore, finds much of the proposed guidance acceptable. However, the staff also finds the guidance complicated and difficult to implement and audit and some of the provisions not sufficiently conservative. The SE discusses a number of issues that should be resolved by the BWRVIP and presents acceptable alternatives, grFinh go) l
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s C. Terry Please contact C. E. (Gene) Carpenter. Jr.. of my staff at (301) 415-2169 if you have any further questions regarding this subject.
Sincerely.
O Gus C. Lainas. Acting Director Le Division of Engineering
]" Office of Nuclear Reactor Regulation
Enclosures:
as stated cc: See next page l
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s C. Terry -
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Please contact C. E. (Gene) Carpenter Jr.. of my staff at (301) 415-2169 if
- you have any further questions regarding.this subject.
Sincerely.
Gus C. L inas. Acting Director ;
Division of Engineering Office of Nuclear Reactor Regulation
Enclosures:
as stated cc: See next page ;
SJCollins/FJMiraglia LCShao/MEMayfield ACRS RPZimmerman- TECo111ns/KAKavanagh Regions ,
TTMartin a!WWWetW4ert NRR/EMCB Reading i GMHolahan/SFNewberry PUBLIC DOCUMENT NAME: G:\BWRVIP\BWRVIP07.LTR See Previous Concurrence !
To receive a copy of this document indicate in the box: *E* - copy w/ enclosure *N" - No copy EMCB:ME E EMCB:ME E EMCB: LPM E EMCB:SC E MJBanic* WHKoo* CECarpenter* KRWichman*
08/14/1987, 08/18/1997_ 08/13/1997 08/18/1997 !
EMCB:d)LC[, E DE:DD N E DE:0 $' E E EJ'SNEadyY JRStrasnickr GClainaf 09/8/1997 Mdd 09/16/1997 09/lI/1997 09/ /1997 0FFICIAL RECORD COPY
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9 C. Terry ,
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Please contact C. E. (Gene) Carpenter Jr., of my staff at-(301) 415-2169 if .
-you have any further questions regardl ng this subject.
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Since:ely, / l Brian W. Sheron, Director !'
Olvisien of Engineering Office of Nucle.r Reactor Regulation l
Enclosures:
as stated t cc: See next page SJCollins/FJMiraglia LC8hao/MEMayfleld ACR8 ,
RPE inumerman TEco111ns/KAKavanagh Regions TTMartin Central File NRR/ENCE Reading GMMolahan/8FNewberry PUBLIC DOCUMENT NAME: Ga\BWRVIP\BWRVIPo7.LTR
- 8ee Previous Concurrence
- T. e#, . e, .t ei. 4.n i. e. air i. n. 6 e - Cm .i.-w. *x - No em /
EMCs:ME E EMCs:ME E EMCs: LPM E EMCsaarfk E MJBanic /n/M WHKo CECarpenter [ fj/l KRW dl1 i 08//V/1997 08////1997 08/13/1997 08//b/1997 i EMCEtBC E DEtDD' E DEtD E' E JR8trosnider GCI'ainas BW8 heron l 08/ /1997 _.d8 / /1997 08/ /1997 08/ /1997 FEMM M? MAW 9 i
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l cc:
George Jones, Executive Chairman Dana Covill, Technical Chairman BWRVIP Assessment Task BWRVIP Assessment Task Pennsylvania Power & Light GPU Nuclear A61 1 Upper Pond Road Two North Ninth Street Parsippany, NJ 07054 Allentown, PA 18101 Joe 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 01740 Port Gibson, MS 3g150 Paul Bemis, Executive Chairman Vaughn Wagoner, Technical Chairman BWRVIP Integration Task BWRVIP Integration Task Washington Public Power Supply System Carolina Power & Light Company P. O. Box 968 One Hannover Square 901 North Power Plant Loop P.O. Box 1551 '
Richland, WA 99352-0968 Raleigh, NC 27612 Lewis Sumner, Executive Chairman John Wilson, Technical Chairman SWRVIP Mitigation Task BWRVIP Mitigation Task Southem Nuclear Operating Co. Public Service Electric & Gas Co.
40 invemess Center Parkway N51 Birmingham, AL 35201 Post Office Sox 236 Hancocks Bridge, NJ 08038 John Blomgren, Executive Chairman Bruce McLeod, Technical Chairman BWRVIP Repair Task BWRVIP Repair Task Commonwealth Edison Co. Southem Nuclear Operating Co.
1400 Opus Place, Suite 600 Post Office Box 1295 Downers Grove, IL 60515 5701 40 invemess Center Parkway Birmingham, AL 35201 Bill Campbell, BWRVIP Vice Chairman Warren Bilanin, EPRI BWRVIP Carolina Power & Light inspection Manager P. O. Box 1551 Joe Gilman, EPRI BWRVIP Raleigh, NC 27612 Mitigation Manager Ken Wolfe, EPRI BWRVIP Robert Carter EPRI BWRVIP Repair Manager 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. Harris Blvd.
Charlotte, NC 28221 l
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