ORIGAMI: A New Interface for Fuel Assembly Characterization with ORIGEN

ORIGAMI (ORIGen Assembly Isotopics) is a new interface to the well-established ORIGEN code
designed to enable simplified, 3-D depletion and decay calculations for used nuclear fuel (UNF) assemblies.


ORIGAMI calculates assembly characteristics through the use of individual discrete depletion nodes, corresponding to axial zones and pin locations. Using a nominal irradiation history, ORIGAMI individually calculates each node’s
isotopic composition using axial and radial relative power distribution maps to create a zone-specific burnup, enabling users to easily specify assembly-wide power distributions for modeling.
ORIGAMI includes several useful capabilities for UNF assembly analyses, including visualization of key parameters by generating MeshView-compatible output files, generation of materials cards for MCNP and KENO for further source term analysis (for example, cask loading and dose studies for dry
storage and transport and simulation of full assemblies for NDA instrumentation studies).

Additionally, ORIGAMI offers the ability to store individual depletion zone concentrations in an ORIGEN-compatible binary file for later re-evaluation (such as decay analysis of previously-depleted assemblies).

Paper presented at the 2015 International High-Level Radioactive Waste Management Conference in Charleston, SC.

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