Example of MCNP input to tally time dependent neutron population?

Mohamad Hairie Rabir @Mohamad-Hairie-Rabir

06 April 2016 1 2K Report

I want to calculate neutron lifetime in a reactor. We can get prompt neutron removal time from 'kcode' calculation. In 'sdef' problem, we can use 'tme' card for time-dependent calculation. I have a subcritical core model where I supposed to calculate neutron lifetime by introducing pulsed neutron source. I want to know how to tally the exponentially decreasing neutron population by time after the pulse. Sample input?

Zain Karriem

Mohamed,

You can use the time card (Tn, p. 3-96 of the MCNP manual).

Regards

Zain

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