OPEN-SOURCE SOFTWARE FOR MATERIAL ACCOUNTANCY
ANALYSIS

Material accountancy is a cornerstone of safeguards and security for nuclear fuel cycle facilities. However, the underlying methodologies used can often be difficult to find and interpret. Written in Python, the Material Performance Indicator Toolkit (MAPIT) is the first free and open-source toolkit for performing material accountancy for bulk nuclear facilities. It provides both a beginnerfriendly graphical user interface and expert-focused application programming interface; both of which contains many common statistical methods used for material accountancy. This paper details the initial capabilities of MAPIT, design philosophies used to implement various statistical methodologies, efforts to generate reproducible results, and design decisions made to improve performance.