2017 | AFC ACCOMPLISHMENTS 130 Figure 1. Typical heating and pressure profile from a fluidity test. Robust, homogeneous, and well-characterized analytical standards are required to perform accurate quantitative analysis (Figure 1) using electron probe microanalysis (EPMA).While typical elemental standards (e.g. iron, silicon, chromium, etc.) can be procured, actinide materials (e.g. plutonium, neptunium) must be fabricated by INL for use.This research involved sintering oxides of uranium, neptunium, and americium, mounting them for use, and testing them for homogeneity. Preparation of Pu, Am and Np Standards for EPMA Analysis Principal Investigator: Karen Wright Collaborators: Cindi Papesch, Rob O’Brien