Fixed buckling

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Fixed buckling

Post by Tomas » Tue Mar 08, 2016 12:31 pm

Hello Jaakko,
we are solving a problem of 2D one pin cell burnup in infinite lattice.
In the problem specification is for calculation of k-eff specified request to enter value of fixed buckling (B^2=BR^2+BZ^2, BR^2= 2 BZ^2) B^2= 2.7779E-03 1/cm^2.
So I want to ask, if it is possible to enter value of fixed buckling in burnup calculation, and if it possible how can I do it?

Thank you

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Jaakko Leppänen
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Re: Fixed buckling

Post by Jaakko Leppänen » Tue Mar 08, 2016 2:17 pm

Buckling is a concept related to deterministic transport theory, and as such it doesn't easily translate into Monte Carlo simulation. Serpent performs B1 leakage correction for the flux spectrum used to collapse cross sections into homogenized group constants essentially by means of a critical buckling search, but this is basically just a deterministic solution with Monte Carlo based cross sections, and the corrections is currently not applied to burnup calculation.
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Re: Fixed buckling

Post by augusto_vib » Wed Sep 15, 2021 12:51 pm


Finding this old post (where it was claimed that depletion calculations could not be carried out with criticality B1 obtained spectra), I wonder if this is possible now in update 32 of SERPENT2. Thank you.

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Re: Fixed buckling

Post by Ana Jambrina » Wed Sep 15, 2021 1:08 pm

"This option ['set fum'] does not affect the flux spectrum used during burnup calculations".
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