United States Nuclear Regulatory Commission - Protecting People and the Environment


ACCESSION #: 9806110105







SIEMENS



June 8, 1998

NRC:98:040



Document Control Desk

ATTN: Chief, Planning, Program and Management Support Branch

U.S. Nuclear Regulatory Commission

Washington, D.C. 20555-0001



Additional Information for the Topical Report EMF-1997(P), "ANFB-10

Critical Power Correlation," Revision 0, (TAC NO. MA1165)



Ref.: 1.  Letter, H. D. Curet (SPC) to Document Control Desk (NRC),

          "Request for Review of ANFB-10 Critical Power Correlation,"

          HDC:97:119, October 30, 1997.



Ref.: 2.  Letter, H. D. Curet (SPC) to Document Control Desk (NRC),

          "Request for Review of EMF-1997(P), Revision 0, Supplement 1,

          ANFB-10 Critical Power Correlation: High Local Peaking Results,"

          NRC:98:007, January 30, 1998.



The attachment to this letter includes additional information relevant to

the topical report submitted by References 1 and 2.  The information

provides a description of how the additional additive constant uncertainty

for rods with local peaking greater than 1.5 is calculated.  The attachment

comprises pages 9 through 12 of Calculation No. E-2363-882-5 dated December

29, 1997.



Siemens Power Corporation considers some of the information contained in

the attachment to this letter to be proprietary.  This information has been

noted as such by enclosing it within brackets.  The affidavit provided with

the original submittal of the referenced topical report satisfies the

requirements of 10 CFR 2.790(b) to support the withholding of this

information from public disclosure.



If you have any questions or if I can be of further assistance, please call

me at (509) 375-8757.



Very truly yours,



James F. Mallay, Director

Regulatory Affairs



/arn



Attachment



cc:  Mr. A. C. Attard (USNRC)           Mr. E. Y. Wang (USNRC)

     Mr. J. L. Birmingham (USNRC)       Project No. 702



Siemens Power Corporation



Nuclear Division         2101 Horn Rapids Road      Tel: (509) 375-8100

Engineering &            P.O. Box 130               Fax: (509) 375-8402

Manufacturing            Richland, WA 99352-0130





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