Subcritical limits for Uranium-235 systems

Journal Article · Thu Jul 01 04:00:00 EDT 1982 · Nucl. Sci. Eng.; (United States)

OSTI ID:5927803

Clark, N K

As a contribution to a required review of the American National Standard for Nuclear Criticality Safety in Operations with Fissionable Materials Outside Reactors, limits for homogeneous /sup 235/U systems have been recalculated to confirm their subcriticality or, where there were doubts, to propose more restrictive values. In addition, other limits were calculated to propose for inclusion in the Standard, namely limits for solutions of /sup 235/UO/sub 2/(NO/sub 3/)/sub 2/ and limits for solutions of both UO/sub 2/F/sub 2/ and UO/sub 2/(NO/sub 3/)/sub 2/ that allow credit for the presence of /sup 238/U. Limits were also calculated for uranium oxides. The same three methods of calculation were used as in similar work done recently for plutonium systems. The validity of each was established by extensive correlations with pertinent critical experiments.

• Research Organization: E.I. du Pont de Nemours and Company, Savannah River Laboratory, Aiken, South Carolina 29808
• OSTI ID: 5927803
• Journal Information: Nucl. Sci. Eng.; (United States), Journal Name: Nucl. Sci. Eng.; (United States) Vol. 81:3; ISSN NSENA
• Country of Publication: United States
• Language: English

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