@techreport{TechReport_2026_LANL_LA-UR-26-27075_Kleedtke, address = {Los Alamos, NM, USA}, author = {Kleedtke, Noah Andrew}, institution = {Los Alamos National Laboratory}, month = {August}, number = {LA-UR-26-27075}, title = {{How to Use Errata and Non-Default Nuclear Data Files with MCNP}}, type = {Presentation}, year = {2026} }