Use the browser workbench

Open ACTINV in your browser to learn the interface, edit a problem, or inspect result files without installation. A laptop or desktop with WebGL enabled works best.

Explore results

Choose Try the results tutorial for a fictional one-hour decay example. Switch between activity, heat, and inventory and select a nuclide to follow its history.

For a real calculation, open or drop a result JSON produced by ACTINV. Use Compare result to overlay a second file. Plots use each result’s recorded time and normalization; the browser does not rescale results to make them comparable.

Photon sources and diagnostics appear under Result record when the file contains them. An inventory CSV export contains the selected time step. A result JSON download retains the complete imported result.

Edit a problem

Open Problem, edit the iron example or load your own JSON, then download the problem. Open that file in the desktop or run it with the CLI/Python interface.

The browser checks the specification. It does not run the activation solver, download nuclear-data libraries, or import transport tallies. Local data paths are preserved for the installed application to resolve.

Keep your edits

Files are read on your device and are not uploaded. Download edits before closing or reloading the tab; the workbench does not retain them between visits. Open one file at a time, up to 32 MiB.

Continue with Your first calculation when you are ready to run the solver.