Simulating flowing target models in FLUKA

Dear FLUKA experts,
Currently, I am doing an irradiation simulation of a flowing target. In detail, there is liquid molten salt flowing inside a pipe that is a closed loop. At the same time, there is a neutron source somewhere in the pipe irradiating the pipe. I did this based on the title ‘Source term analysis of a high temperature flowing molten salt irradiation loop’, so ultimately what I wanted to get was the isotopic yield of the flowing molten salt under neutron irradiation, i.e. the activity of the residual nucleus. For this residual nuclear activity, I know it is obtained by ‘RESNUCLEI’. Now what I don’t understand the most is how the flow target is realized?
As far as I know, it is almost impossible to do a simulation of a flowing target with FLUKA. I wonder if there is any proper way to implement it? So I would like to ask the FLUKA experts.
Thank you very much for your help and answer! Wish you the best of luck in everything.
Lin

Dear Lin,

thank you for your question, I will come back to you as soon as possible.

Cheers,
Giuseppe

Dear Giuseppe,
Thank you very much for your reply! Looking forward to your advice!
Sincere thanks to you!

Cheers,
Lin

Dear Lin,

as you have pointed out, and as it is said in other post like in Link, FLUKA gives you the possibility of scoring the isotope production yield in a fixed geometry. Therefore, I fear there is no solution for your case. The dynamics coming from the flowing of the liquid lead must be introduce by yourself separately.

I agree that the best way to score the isotopes yield in the lead region is with RESNUCLEi card (without associating a DCYSCORE). To the results coming from this detector (nuclei/primary), you will need then to apply the dynamics of your specific case.

Best,
Giuseppe

Dear Giuseppe,
Thank you very much for your reply. Wish you all the best.
Lin

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