MCNP: Ctme Card Impacts on Results

Thread starter Salman Khan
Start date Jun 12, 2023
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Mcnp

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SUMMARY

The Ctme card in MCNP (Monte Carlo N-Particle Transport Code) is essential for limiting the running time of input files. It directly impacts the tally results, as only the number of particles processed before the time limit is reached is considered in the tallies. Sufficient particle counts yield reliable statistics, while insufficient counts result in poor statistical outcomes. Therefore, careful management of the Ctme card is crucial for accurate results in MCNP simulations.

PREREQUISITES

Understanding of MCNP (Monte Carlo N-Particle Transport Code)
Familiarity with particle transport simulations
Knowledge of statistical analysis in simulation results
Experience with input file configuration in MCNP

NEXT STEPS

Explore the MCNP documentation on the Ctme card functionality
Learn about optimizing particle counts for reliable statistical results
Investigate techniques for improving simulation runtime efficiency
Study the impact of different tally types in MCNP

USEFUL FOR

Researchers, nuclear engineers, and simulation specialists looking to enhance the accuracy and efficiency of MCNP simulations will benefit from this discussion.

Jun 12, 2023

Salman Khan

Ctme card is used to limit the running time of the mcnp input file, does it affect the telly result or not ?

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Jun 12, 2023

Grelbr42

Yes.

In that whatever number of particles have been run when the time is exceeded is what is used in the tallies. If you have enough particles to get good stats, great! If not, then you get bad stats on that run.