NSD-NRC-98-5796, Notifies NRC That Approved Process in WCAP-12488-A Being Used to Account for Design Mods for 17X17 Rfa with Ifm Grid Design as Required by Fcep SER

Notifies NRC That Approved Process in WCAP-12488-A Being Used to Account for Design Mods for 17X17 Rfa with Ifm Grid Design as Required by Fcep SER

ML20154M323
Person / Time
Site:	Wolf Creek
Issue date:	10/13/1998
From:	Sepp H Westinghouse, Div of CBS Corp
To:	Collins T NRC/IRM
References
NSD-NRC-98-5796, NUDOCS 9810200236
Download: ML20154M323 (1)

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Westinghouse Energy Systems Box 355

. Electric Corporation Pittstegh PennsyNania 15230 0355 I

October 13,1998

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NSD-NRC-98-5796 U.S. Nuclear Regulatory Commission gv h

- ATTN: Document Control Desk 9-Washington,DC 20555 Attention:

T. E. Collins, Chief Reactor Systems Branch j

j Division of Systems Safety and Analysis i

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Subject:

Fuel Criteria Evaluation Process Notification for the 17X17 Robust Fuel Assembly with IFM Grid Design

Reference:

Letter from N. J. Liparuto (Westinghouse) to J. E. Lyons (NRC), " Transmittal of Response to NRC Request for Information on Wolf Creek Fuel Design Modifications,"

NSD-NRC-97-5189, June 30,1997 1

Dear Mr. Collins:

l The NRC was notified in the above reference that the Westinghouse Fuel Criteria Evaluation Process j

~(FCEP) was being used to account for design modifications specific to Wolf Creek fuel. The Wolf Creek L

design modifications (i.e., Modified VANTAGE 511 (V511) Lov7 Pressure Drop (LPD) mixing vane grids, Modified V511 Intermediate Flow Mixer (IFM) grids, and thicker walled thimble and instrument tubes) are l

now being generically applied to 17X17 V511 fuel in other Westinghouse plants as part of a Robust Fuel Assembly (RFA) program. This letter serves as Westinghouse notification to the NRC, as required by the

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FCEP SER, that the NRC-approved process in WCAP-12488-A is being used to account for the design modifications for the 17X17 RFA with IFM grid design. The above reference concluded that the WRB-2 DNB correlation is applicable to the modified Wolf Creek assembly design. This conclusion also applies to L

the generic 17X17 RFA with IFM grid design. Initial application of this generic FCEP notification is planned for the Salem Unit 2 Cycle 11 fuel region which is planned to be inserted into Salem Unit 2 in May 1999..

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l Very truly yours, p' l' I II. A. Sepp, Manager Regulatory and Licensing Engineering cc:

P. C. Wen, NRR/DRPM/PGEB (10115) l.

9810200236 981013 i

PDR ADOCK 05000482 i

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