The scale 6.2 origen API for high performance depletion

In recent years, the SCALE 6.2 development efforts have included modernization of key components of the modular SCALE code system. The ORIGEN depletion/decay module has received extensive improvements, including the addition of an application programming interface (API) for both C++ and Fortran with modern object-oriented design and various solver enhancements. This paper highlights the API capabilities that are currently available in beta release for embedding ORIGEN depletion calculations in other codes (e.g., for coupled transport/depletion calculations). The capabilities of the API are described and timing results are presented for both stand-alone depletion and coupled transport/depletion. The coupled timing was performed with the CASL full-core, pin-resolved deterministic transport code, MPACT, where memory and runtime constraints prompted use of an emerging capability to create small, specific-purpose burnup/decay chains.