### How can I output the cumulative fission source?

Posted:

**Mon Apr 10, 2017 11:47 am**Hi. I want to the study the influence of the batch size to the bias in the fission source. So I want to output some kind of parameter like cumulative fission source or something else, then calculate its error to study the the influence of the batch size to the bias in the fission source.

But I search on the manual, I only found fission source entropy which dipicts the convergence of the fission source which is not what I want. Also, I have found some papers focousing on this area.(http://www.sciencedirect.com/science/ar ... 4914002175)

But I don't know how they get the cumulative fission source from Serpent.

I' m confused

But I search on the manual, I only found fission source entropy which dipicts the convergence of the fission source which is not what I want. Also, I have found some papers focousing on this area.(http://www.sciencedirect.com/science/ar ... 4914002175)

But I don't know how they get the cumulative fission source from Serpent.

I' m confused