VERAIO is a set of utility codes used to provide a common set of inputs and outputs to the Virtual Environment for Reactor Applications (VERA). VERA is a collection of several different computer codes and having a common input and output, instead of having to deal with input and output from each individual code, allows VERA to be easy to use and reduces errors associated with code operability. The VERAIO utilities include VERAIn, VERAView, and VERARun. VERARun is a set of scripts that allow for the easy execution of VERA in a high-performance computing environment. VERARun creates a machine-specific PBS script for an input and can then submit that script to the queue.

VERAView is a graphical user interface (GUI) that reads a VERA HDF output file and allows users to visualize and analyze results. The Python-based software is easy to install, intuitive to use, and provides instantaneous 2D and 3D images, 1D plots, and alpha-numeric data from VERA multi-physics simulations. VERAView seamlessly integrates multiple physics capabilities and supports extensibility to the future needs and applications of its users.

VERAView Window Example


  1. Andrew Godfrey, Ronald Lee, and Travis Lange. “VERAView User’s Guide,” Tech. Report, CASL-U-2016-1058-003, Oak Ridge National Laboratory, Aug. (2019)
  2. Erik Walker. “VERAIn Programmer Manual,” Tech. Report, CASL-U-2019-1884-001, Oak Ridge National Laboratory, Nov. (2019)