United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #: 9804300128


April 1, 1998


Document Control Desk

ATTN:  Chief, Planning, Program and Management Support Branch

U.S. Nuclear Regulatory Commission

Washington, D.C. 20555-0001

Interim Report of Evaluation of a Deviation Pursuant to 10 CFR


Ref.:     1.   Letter, J. S. Holm (SPC) to Document Control Desk (NRC),

"Interim Report of Evaluation of a Deviation Pursuant to 10 CFR 21.21

(a)(2)," NRC:98:001, January 15, 1998.

Ref.:     2.   Letter, J. F Mallay (SPC) to Document Control Desk (NRC),

"RELAP4 Excessive Variability, NRC:98:016, March 17, 1998.

The following interim report was provided to the NRC by the Reference 1

letter pursuant to the requirements of 10 CFR 21 to submit an Interim

report on issues for which an evaluation will not be completed within 60

days of discovery:

98-001 "RELAP4 Excessive Variability."

Additional information regarding the evaluation was provided in Reference


Reference 1 indicated that the scheduled completion date for the

evaluation was April 3, 1998. The last portion of the evaluation is

underway, and the revised completion date is May 1, 1998.  The evaluation

addresses the impact on all plants for which SPC performs LBLOCA

analysis, all of which have been completed except one.  The results to

date are consistent with the discussion in Reference 2, which indicated

that the peak cladding temperature was lower after correcting for the


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


cc: Mr. E. Y. Wang (USNRC)

     Project No. 702

Siemens Power Corporation

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

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

                             Richland, WA 99352-0130


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