TY - RPRT TI - MCNPy AU - Nowack, Aaron [Sandia National Lab. (SNL-CA), Livermore, CA (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)] PY - 2026 DO - 10.11578/dc.20260520.6 UR - https://www.osti.gov/biblio/code-181340 ID - code-181340 ER -