The software development division of ReactorMC

BelvoirDynamics

Software for Nuclear Monte Carlo

Two products built for engineers writing MCNP, OpenMC, Serpent, and SCONE input files — one inside the editor you already use, one fully offline on the desktop.

OWEN (VS Code extension) and GROVES (desktop editor) share the same domain knowledge — lattice builder, validators, NRDP material lookup — surfaced in the workflow that fits the job.

OWEN

v0.1.0 • In development

VS Code Extension

Syntax highlighting, validators, NRDP material lookup, lattice builder, and Community Library access — inside VS Code or Cursor.

  • ·Per-code highlighting for MCNP, OpenMC, Serpent, SCONE
  • ·Static validators: density sign, fraction sign, ZAID suffixes
  • ·Lattice builder webview emitting all four formats
Open OWEN page →

GROVES

v1.0.1 • Windows

Desktop Reactor Input Editor

Air-gap-friendly desktop editor with a PyVista-backed 3D viewer, visual lattice builder, and templates for every supported code.

  • ·Fully offline — no telemetry, no network calls
  • ·3D + 2D geometry preview with rotate, zoom, pan
  • ·Pin cells, assemblies, BWR bundles, quarter-core templates
Open GROVES page →

Which one?

Pick OWEN if…

You already work in VS Code or Cursor and want highlighting, validation, and the lattice builder inline with the rest of your project.

Pick GROVES if…

You need a fully-offline standalone editor for air-gapped or export-controlled workflows, with a built-in 3D viewer and no Python toolchain to manage.

About BelvoirDynamics

One division, two tools, one workflow

BelvoirDynamics is the software development division of ReactorMC. Both products target the same friction points in a Monte Carlo workflow — typing the wrong density sign, mismatching a ZAID temperature suffix, hand-laying a 17×17 lattice — and surface the same validators and builders in the form each user already prefers.

Shared knowledge

The same validators, NRDP material library, and lattice generators feed both products.

Independent releases

OWEN ships as a VSIX; GROVES ships as a signed Windows installer on GitHub Releases.

No telemetry

Neither product collects analytics or transmits input files. Verify SHA-256 checksums on each release page.

Explore OWEN →Explore GROVES →

Releases: caalh/BelvoirDynamics-releases — signed Windows installers with SHA-256 checksums.