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IRSN, Institut de radioprotection et de sûreté nucléaire

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Enhancing Nuclear Safety


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Definition of a new UO2F2 density law for low-moderated solutions (H/U<20) and consequences on criticality safety


Congress title :ICNC 2007
Congress location :Saint-Petersbourg
Congress date :28/05/2007

Document type > *Congrès/colloque

Keywords > criticality, density law, hydrates, Johnson&Kraus, safety

Research Unit > IRSN/DSU/SEC/LERD

Authors > EVO Stéphane, LECLAIRE Nicolas

Publication Date > 01/06/2007

Summary

In criticality studies, the bulk density of fissile media being generally unknown, density laws are needed to accurately determine the water content associated with the fissile media. They are applicable only on a determined range. Outside this range, the assessment of concentration values can be erroneous. Moreover, they do the link between two input parameters, the fissile nuclide density and the moderation ratio through the bulk density calculation.

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