The GOTHIC v8.4(QA) is available.

GOTHIC 8.4(QA) contains a variety of new features and improvements that expand the range of applicability and make the software easier to use. Major new features include:

• GOTHIC Lite - This new feature provides customizable options to limit on screen options and features. A model properties page is displayed when opening a model and users can select from various modes and options. This feature can be helpful to focus input requirements, help new users learn the code and facilitate faster model generation.
• Scenario Manager - this new feature in GOTHIC 8.4 allows the automatic creation and running of cases and permutations from within a single GOTHIC model. This also includes capability to post-process the results from these cases.
• Generalized Combustion Model - previous versions of GOTHIC allow for hydrogen burn and recombiners, but in GOTHIC 8.4 these models have been generalized so that any combustible gas or combination of combustible gases may be burned within a subdivided control volume or burned in a recombiner component. Also, the recombiner model has been modified to allow catalytic plate poisoning due to the adsorption of inhibitor gases.
• Fission Product Tracking Enhancements - GOTHIC 8.4 includes a pool scrubbing model, a bubble breakthrough model for entrainment from pool surfaces and hygroscopic and surface tension effects for drops.
• Ability to include more than one multiphase fluid in a simulation - GOTHIC 8.4 allows for hydraulic Systems to be defined and a different multi-phase fluid can be assigned to each system. This allows for simulations of systems with different fluids within the same GOTHIC model (e.g., water in some volumes and molten salt in others).
• Radiative Heat Transfer Enhancements - this includes the ability to define radiation sets, the ability to specify different intravolume scopes on each side of the conductor and the ability to toggle radiation ON or OFF in a model without deleting the shape factors.
• Cell Group Sets - A capability to create cell group sets for use with line graphs and datafiles. Options for computing the Minimum, Maximum, Volume Average, Phase Volume Fraction Average, Mass Average, or Phase Mass Fraction Average for the group is provided.

GOTHIC Versions

Version	Release	Summary of Major Enhancements
8.4	Jun. 2022	Scenario manager, fission product tracking enhancements, improvements to radiation heat transfer modeling, ability to include more than one multiphase fluid in a simulation, generalized combustion model, options to streamline input requirements, avariety of other improvements related to thermal conductors, post-processing and the user interface
8.3	Apr. 2019	Generic fluid property framework to support non-LWRs, fluid property tables for water and molten salts, improved hydrogen burn, GUI enhancements for large models, tracer improvements, Unit toggling, material properties library, several improvements to support modeling dry aerosols.
8.2	Nov. 2016	Generalized restart, extend liquid components to both track multiple fields in both liquid and drops, extend radioactive isotopes to generic tracers, add filter, charcoal filter and dryer/demister components, improve command file capability, improve panning and zooming.
8.1	Sep. 2014	Point kinetics model, simplified homologous pump input, improved spray model, torus blockage shape, generalize conductor surface assignment, integrated user training modules, compatibility with AptPlot, improve screen refresh for subdivided volumes, other user interface improvements for working with large models.
8.0	Jan. 2012	Multiple drop fields and drop field size distribution, parallel processing, dissolved gases, sediment transport for liquid components, local control variables, pipe elasticity effects for water hammer, improvements in the input generation for subdivided volumes.
7.2/a/b	Sep. 2004/ Jan. 2006/ Mar. 2009	Liquid components, improved ice model that allows for freezing, melting and sublimation, additional flexibility for turbulence models, improved heat exchanger component models, filter component for radioactive isotopes, DLM for heat and mass transfer with optional enhancement factors for mist generation and film roughening effects.
7.1	Dec. 2002	Improved fan cooler model, conductors assigned to blockages, gap conductance mode, curbs, command files, Graphical User Interface substantially revised.
7.0	Jun. 2001	Porous media approach for partial cell volume and face area blockages using the FAVOR methodology, 3D connectors, flow networks, 2nd order numerics, mist model, envelope sets, copy/paste options, improved drop entrainment and deposition models, improved wall heat and mass transfer model specifically for condensation in the presence of noncondensing gases.
6.x	1997-2001	Stratified flow, 2D conduction, radioactive transport in the vapor phase, data files to interface with Tecplot, file comparison utility, additional control variables, improved pressure matrix solution methods for large problems.
5.x	1995-1997	Models for drop break up and drop agglomeration, properties for heavy water, ability to import data tables.
4.x	1993-1995	κ-ε turbulence model, hydrogen burn, fan coolers, improved interphase heat and mass transfer, control variables, radioactive isotopes, radiant heat transfer.