Dear All,
In my simulations estimating count rates due to external sources at various subcritical levels, I have observed that the discrepancy between the MCNP and OpenMC simulated count rates increases as keffk_{\text{eff}}keff approaches 1. This difference becomes particularly significant when keffk_{\text{eff}}keff exceeds 0.95.
Could someone kindly review the results and provide clarification on the cause of this variation? I would greatly appreciate your support in resolving this issue.
With thanks & best regards,
L Thilagam
