Part 21 Report - 1997-407

 
 

ACCESSION #: 9707150340



                         Interim Report (97-006)



Subject:



Interim report of evaluation of a deviation pursuant to 10 CFR

21.21(a)(2)



Inadequate Confirmation of 17 x 17 HTC Correlation to 15 x 15 Design



Identification of Basic Activity:



EXEM/PWR ECCS Evaluation Model



Basic Activity Supplied By:



Siemens Power Corporation - Nuclear Division



Nature of Deviation:



SPC did not adequately confirm the conservatism of scaling of the HTCs

from 17 x 17 data to 1505 data.  This was a self-discovered item as part

of the LBLOCA assessment arid certain confirmations were performed. 

Also, the NRC concluded during NRC Inspection 99900081/97-01 additional

benchmark work should be performed to validate the scaling methodology.



Discovery Date;



May 13, 1997



Corrective Actions to Date:



Nonconformance report (NCR 6160) was prepared and processed by the

management review team as required by SPC-ND's Quality Assurance Manual,

EMF-1.  Project definition is proceeding and will be documented as part

of a response to the NRC inspection report.



Evaluation Completion Schedule Date:



September 15, 1997





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