|SUBJECT:||M.S. Thesis Presentation|
|TIME:||Monday, November 24, 2014, 12:00 p.m.|
|PLACE:||Boggs Building, 3-47|
|TITLE:||Investigation and Improvement of Criticality Calculations in MCNP5 involving Shannon Entropy Convergence|
|COMMITTEE:||Dr. Bojan Petrovic, Chair (NRE)
Dr. Nolan Hertel (NRE)
Dr. Dingkang Zhang (NRE)
Criticality calculations are often performed in MCNP5 using the Shannon entropy as an indicator of source convergence for the given neutron transport problem. The Shannon entropy is a concept that comes from information theory. The Shannon entropy is calculated for each batch in MCNP5, and it has been shown that the Shannon entropy tends to converge to a single value as the source distribution converges. MCNP5 has its own criteria for when the Shannon entropy has converged and recommends a number for how many batches should be skipped; however, this value for how many batches should be skipped is often not very accurate and has room for improvement.