Physics Integration KErnels (PIKE)

The three dimension multi-group neutron transport Monte-Carlo program MCMG-II and the multi-group point burnup program STEP1.0 based on linear chain method are adopted in the transport-burnup coupling system. MCMG-II has fine geometry description capability and a new collision mechanism about the material except the traditional point wise continuous cross section calculation to speed up. STEP1.0 using backtracking algorithm to build linear chains adaptively and has analytical solutions to avoid time step restriction. The coupling information between the burnup and transport program includes neutron spectrum, source strength, reaction rates, initial nuclide density and its variation and the fission products. The interpreted script language Python is used to implement the coupling system. The coupling information can be transferred accurately and smoothly between the programs by its powerful text processing functions. It can also accomplish the step by step transport-burnup calculations automatically according to the total power, radiation time and timing step numbers with its interpreted, interactive characters and perform the graphic processing of the results. The coupling system can do the high fidelity burnup calculations with more comprehensive reference to the factors such as geometry, neutron spectrum and radiation time.© 2013 ASME

The Transport-Burnup Coupling System Between MCMG-II and STEP1.0 for High Fidelity Calculations

A CASL Multiphysics Code Coupling Primer: Software Integration 101.

The authors briefly summarize the development of, and test experience with, an initial data interface between the structural mechanics code Diablo and the SHARP reactor simulation system data hub MOAB. That interface has been exercised both to write MOAB databases from Diablo, and then also to use such a database to read in part of a simulation definition for a subsequent Diablo execution. All enhancements are integrated into the central Diablo source repository. The SHARP software system for advanced simulation of nuclear reactors and power plant systems is sponsored by DOE's Nuclear Energy Advanced Modeling and Simulation (NEAMS) program. SHARP has been architected as a federation of single-physics simulation tools to permit flexibility in programming langugages and leveraging of past and on-going investments. Solution of multi-physics problems will be coordinated by, and data passed through, a central 'hub'. SHARP's hub implementation is utilizing MOAB: a Mesh-Oriented datABase. This same data hub approach is also intended to enable multi-resolution simulations, e.g, lower-dimension plant-scale simulations can be informed by high-fidelity 3D models of particular critical components.

/pdf/adding-a-moab-geometry-interface-to-sharp-structural-430kn4nn0c.pdf

Adding a MOAB Geometry Interface to SHARP Structural Mechanics

This summary report contains an overview of work performed under the work package entitled “FY2014 NEAMS INL-Engineering Scale Fuel Performance & Interface with RPL Tools.” A first chapter identifies the specific FY-14 milestones, providing a basic description of the associated work and references to related detailed documentation. Where applicable, a representative technical result is provided. A second chapter summarizes substantial additional work including 1) efforts to improve numerical convergence and contact in BISON, 2) development of capability to simulate hydrogen behavior in Zircaloy cladding and 3) efforts to enhance collaborative work with the Halden Research Program. A final chapter briefly outlines planned future work.

/pdf/summary-of-bison-development-activities-neams-fy14-report-3t9c9nzf5o.pdf

Summary of BISON Development Activities: NEAMS FY14 Report

Nuclear power stations involve a range of complex and interacting multi-physical processes. With the rapid development of high-performance computing technology, accurate multi-physics simulation in...

Multi-physics coupling simulation in virtual reactors:

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Multi-physics coupling simulation in virtual reactors: