Empty usrrnc.f Output

Scoring
1

Versions

Please provide the used software versions.

FLUKA: 4-4.0
Flair: N/A

Description

Hello FLUKA experts,

I’m trying to run a simulation using usrrnc.f to score residual nuclei. However, when I run the simulation, the output file of usrrnc.f, despite being created, is never populated with anything. I wonder if you could point out an error, a condition, a transport threshold or something that is wrong with the usrrnc.f routine or my input file.

Please note that I wanted NCASE as an accessible stack variable in my usrrnc.f file so that I could relate a residual nucleus to the primary whose lineage created it.

nEXO_2026.inp (9.0 KB)

usrrnc.f (1.7 KB)

Best regards,

Regan

Input files

Please upload all relevant files. (FLUKA input file, Flair project file, user routines, and data files)

3

Dear Regan,

Thank you for your question! I will look into this and get back to you shortly.

Best regards,

Tommaso

4

Hello Regan,

As discussed, I am attaching the updated files. Modifications:

  • Addition of a RADDECAY card
  • Stream to a new ASCII file, opened at the first USRRNC call

Unrelated to your main issue, I wanted to flag a few aspects you might want to consider as you develop this study:

  • SOURCE card: you likely already have a dedicated source routine for this.
  • USERDUMP card for MGDRAW usage: you may also be planning additional custom scoring.
  • Neutron point-wise transport: you’ve chosen point-wise transport, which means the LOW-MAT cards are not needed. The COLDOX material caught my eye - if this is oxygen at low temperature, you can ensure correct Doppler broadening of the cross sections using the LOW-PWXS card. This isn’t meant as a thorough review of these aspects of the input file, just a few points worth keeping in mind. If useful, you can take a look at the LOW-PWXS input card in the FLUKA manual, and the neutron lecture from the FLUKA course.

I’ll let you take it from here; feel free to reach out if anything else is needed.
Best regards,

Tommaso

usrrnc.f (1.8 KB)

nEXO_2026.inp (9.0 KB)