TY - RPRT TI - (U) Calculating First-Order Sensitivities to Material Density and Composition in Fixed-Source Problems Using the MCNP6 Perturbation Capability AU - Favorite, Jeffrey A. PY - 2022 DO - 10.2172/1846872 UR - https://www.osti.gov/biblio/1846872 ID - 1846872 ER -