Official Release of the RAVEN code: version 3.0

[Congjian Wang]

Dear RAVEN Users,

We have officially released RAVEN version 3.0 (https://github.com/idaholab/raven/releases). There are several new features and some improvements have been added in this release, please see the following for more detailed information.

New Capabilities:

• Bayesian Optimization #2123. A new optimizer node 'BayesianOptimizer' is added, which allows for the specification of a Bayesian Optimization algorithm. This method also requires the specification of a GPR ROM under the Models node. The GPR ROM node is also extended to include custom kernel specification and anisotropic kernels.
• Sensor placement optimization via sparse sensing post-processor #2044. This post-processor will inform the users of the optimal locations to place their sensors in order to reconstruct the responses of interest with high precision.
• Physics-guided coverage mapping (PCM) for model validation #2018. Develop and implement two separate approaches to handle time-dependence dataset for PCM.
• Implement Markov-switching autoregressive models #2161 for time-series analysis
• Implements data transformations in Time-Series Analysis (TSA) module #2121 and #2165

New Code Interfaces:

• Add PARCS interface #2010 to support nuclear fuel loading pattern optimization.
• Addition of SCALE CSAS sequence in scale interface #2155 to support nuclear reactor criticality safety analysis.
• Add ABCE interface #2184 to support agent-based capacity expansion modeling. ABCE is a modeling tool used to model adding capacity (new generators) to an electricity market.

Other Features:

• Switches the implementation of 1D probability distributions from C++ library Crow to appropriate python libraries #2201
• Updating to tensorflow 2.13 for Macos arm issues #2138
• Global TSA via ROMCollection #2189
• Adds VARMA model to the TSA module #2180
• Subdomain basic statistics post-processor #2119

Submodule Updates:

The updates for the submodules are tracked by issue #1114. In this release, there are significant updates in following Plugins. We recommend the users to check the following links for more details.
TEAL: https://github.com/idaholab/TEAL
HERON: https://github.com/idaholab/HERON
SR2ML: https://github.com/idaholab/SR2ML
LOGOS: https://github.com/idaholab/LOGOS
FARM: https://github.com/Argonne-National-Laboratory/FARM

Sincerely,

Congjian Wang 

Computational Nuclear Scientist  |   Digital Reactor Technology and Development 

congji...@inl.gov   |  208-526-7220   |   765-656-4093 

Idaho National Laboratory   |  2525 Fremont Ave.   |   Idaho Falls, ID   |  83415 

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