Flattop k-eff sensitivity example

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Revision as of 12:26, 20 June 2017 by Ville Valtavirta (Talk | contribs) (Description)

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This example demonstrates some basic sensitivity calculation capabilities for the Popsy (Flattop) critical experiment (PU-MET-FAST-006 in the ICSBEP handbook).


The experimental configuration consists of a plutonium alloy sphere (radius 4.5332 cm) reflected by a natural uranium blanket (outer radius 24.1420 cm). The multiplication factor of the system is close to unity (being a critical experiment). This input calculates the sensitivity of the multiplication factor to perturbations applied to the cross sections of 235U, 238U, 239Pu and 240Pu. A processing script for MATLAB/OCTAVE is provided for printing and plotting out the sensitivities.



Data-processing and plotting