American Nuclear Society
Home

Home / Store / Journals / Electronic Articles / Nuclear Technology / Volume 128 / Number 3 / Pages 402-408

The Effective Delayed Neutron Fraction for Bare-Metal Criticals

Sol Pearlstein

Nuclear Technology / Volume 128 / Number 3 / Pages 402-408

December 1999

Format:

Price:$30.00
Member Price:$27.00
Member Savings:$3.00

Given sufficient material, a large number of actinides could be used to form bare-metal criticals. The effective delayed neutron fraction for a bare critical comprised of a fissile material is comparable with the absolute delayed neutron fraction. The effective delayed neutron fraction for a bare critical composed of a fissionable material is reduced by factors of 2 to 10 when compared with the absolute delayed neutron fraction. When the effective delayed neutron fraction is small, the difference between delayed and prompt criticality is small, and extreme caution must be used in critical assemblies of these materials. This study uses an approximate but realistic model to survey the actinide region to compare effective delayed neutron fractions with absolute delayed neutron fractions.

 
 
 
Questions or comments about the site? Contact the ANS Webmaster.
advertisement