MGXS in the presence of (n,xn) reaction

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1

Hi there,

I’m trying to generate MGXS for diffusion analysis, and non-negligible (n,xn) reaction exists in my case.

From what I understand reffering Different k-eff in RESULTS and calculation, neutron multiplication should be accounted for scattering to reproduce the keff value using diffusion code.
So I have used nu-scatter matrix and calculated removal Xs as [total Xs - in group nu-scatter Xs], but I’m still learning theory in OpenMC and not confident about this.

Could you tell whether the method is right or other should be used?
Appreciate for your kindness!

2

In some articles they use \Signma_transport instead \Sigma_total to calculate nxn correction XS. Have you solved it? I can’t confirm the correctness of this method