VERA VERA.edu

Software availability

U.S. Citizens and most LPRs as limited by U.S. export control regulations

Students, Faculty

MOC radiation transport

included

included

Sn and SPn radiation transport

included

Not included

Monte Carlo radiation transport

included

included

Integrated cross-section library

included

Limited functionality

Integrated depletion library

included

Limited functionality

Subchannel thermal-hydraulics

included

included

Fuel performance

included

included

Coolant chemistry

included

included

Uncertainty quantification and sensitivity analysis

included

included

Coupled physics modules

MOC + subchannel

Sn & SPn + subchannel

MOC + subchannel + fuel performance

MOC + subchannel

Standardized input/output

included

included

 

VERA VERA.edu

Software availability

U.S. Citizens and most LPRs as limited by U.S. export control regulations

Students, Faculty

MOC radiation transport

included

included

Sn and SPn radiation transport

included

Not included

Monte Carlo radiation transport

included

included

Integrated cross-section library

included

Limited functionality

Integrated depletion library

included

Limited functionality

Subchannel thermal-hydraulics

included

included

Fuel performance

included

included

Coolant chemistry

included

included

Uncertainty quantification and sensitivity analysis

included

included

Coupled physics modules

MOC + subchannel

Sn & SPn + subchannel

MOC + subchannel + fuel performance

MOC + subchannel

Standardized input/output

included

included

VERA 3.3 General Description

The Virtual Environment for Reactor Applications (VERA) components included in this distribution include selected computational tools and supporting infrastructure that solve neutronics, thermal-hydraulics, fuel performance, and coupled neutronics-thermal hydraulics-fuel performance problems. The infrastructure components provide a simplified common user input capability and provide for the physics integration with data transfer and coupled-physics iterative solution algorithms.

Neutronics analysis can be performed for 2D lattices, 2D core and 3D core problems for pressurized water reactor geometries that can be used to calculate criticality and fission rate distributions by pin for input fuel compositions. Two neutronics capabilities are provided in this distribution including 2D lattices, 2D core planes, and 3D core geometries. VERA includes integrated cross section capabilities that provide problem-specific cross sections for the problems defined. A thermal-hydraulics capability is provided with VERA that allows thermal-hydraulics analyses for single and multiple fuel assemblies using the VERA standard input. VERA's fuel rod performance capability includes 1D, 2D, and 3D fuel rod temperature, fuel rod internal pressure, free gas volume, clad integrity and fuel rod waterside diameter. These capabilities allow simulation of power cycling, fuel conditioning and deconditioning, high burnup performance, power uprate scoping studies, and accident performance. Coupled physics capabilities are provided for MOC radiation transport and subchannel thermal-hydraulics (2-physics, 2-way), and MOC radiation transport, subchannel thermal-hydraulics, and axisymmetric 2D R-Z fuel rod modeling (3 physics, 2-way). VERA3.3 is intended to be used for testing and evaluation of the released components of VERA. Testing within CASL has focused specifically on Westinghouse four-loop reactor geometries and conditions with example problems included in the distribution.

VERA 3.3 was released in April 2015. Many of the listed functionalities have known issues and varying levels of maturity. Please read the Release notes to learn about the capabilities of each VERA physics component. VERA is under active development by CASL; releases are nominally in 6 to 9 month increments.

VERA System Requirements Linux platforms, including CentOS 6.6, Ubuntu 14.04.1, SUSE Linux Enterprise Server 11 SP3, Fedora 21, and CrayOS, with functioning gcc, g++ and gfortran compilers and X11 libraries are supported. A computer having a least 32 cores is required to run standalone cases; coupled cases require a machine having at least as many computing cores as fuel assemblies to be simulated in the reactor core, considering symmetry. Detailed system software and third party library requirements are provided in the VERA Installation guide.

VERA.edu

The Virtual Environment for Reactor Applications, educational version (VERA.edu) components included in this distribution include selected computational tools and supporting infrastructure that solve neutronics, thermal-hydraulics, fuel performance, and coupled neutronics-thermal hydraulics-fuel performance problems. The infrastructure components provide a simplified common user input capability and provide for the physics integration with data transfer and coupled-physics iterative solution algorithms.  This distribution is intended to be used to develop, test and evaluate instructional materials that will be distributed with a future EDU release that will be used in academic instruction environments. Testing within CASL has focused specifically on Westinghouse four-loop reactor geometries and conditions with example problems included in the distribution.

Neutronics analysis can be performed for 2D lattices, 2D core and 3D core problems for pressurized water reactor geometries that can be used to calculate criticality and fission rate distributions by pin for input fuel compositions. MPACT uses the Method of Characteristics transport approach for 2D problems. For 3D problems, MPACT uses the 2D/1D method which uses 2D MOC in a radial plane and diffusion or SPn in the axial direction. MPACT includes integrated cross section capabilities that provide problem-specific cross sections generated using the subgroup methodology. The code can be executed both 2D and 3D problems in parallel to reduce overall run time. A thermal-hydraulics capability is provided with CTF (an updated version of the COBRA-TF) that allows thermal-hydraulics analyses for single and multiple assemblies using the simplified VERA common input. This distribution also includes coupled neutronics/thermal-hydraulics capabilities to allow calculations using MPACT coupled with CTF. The VERA fuel rod performance component BISON-CASL calculates, on a 2D or 3D basis, fuel rod temperature, fuel rod internal pressure, free gas volume, clad integrity and fuel rod waterside diameter. These capabilities allow simulation of power cycling, fuel conditioning and deconditioning, high burnup performance, power uprate scoping studies, and accident performance. 

VERA.edu 3.3 was released in September 2015. Many of the listed functionalities have known issues and varying levels of maturity. Please read the Release notes to learn about the capabilities of each VERA physics component. VERA is under active development by CASL; releases are nominally in 6 to 9 month increments. 

VERA System Requirements Linux platforms, including CentOS 6.6, Ubuntu 14.04.1, SUSE Linux Enterprise Server 11 SP3, Fedora 21, and CrayOS, with functioning gcc, g++ and gfortran compilers and X11 libraries are supported. A computer having a least 32 cores is required to run standalone cases; coupled cases require a machine having at least as many computing cores as fuel assemblies to be simulated in the reactor core, considering symmetry. Detailed system software and third party library requirements are provided in the VERA Installation guide.