GROVES

MCNP workspace validation

File → Open MCNP Project or GROVES → Validate Workspace — cross-file checks across read/copy includes; Problems panel with double-click goto. Requires Node.js on PATH and a built packages/mcnp-workspace CLI (bundled in the Windows installer; dev builds need npm run build).

Syntax highlighting

Four palettes (Classic, Solarized, High Contrast, Pastel) for MCNP, OpenMC, Serpent, and SCONE via QSyntaxHighlighter.

Deep validation

Per-language diagnostics: MCNP ZAID/suffix, density sign, mt/S(α,β), macrobody counts; OpenMC IndependentSource/RectangularPrism API; Serpent cuboid/omp; SCONE aceNeutronDatabase and pinUniverse rules.

MCNP reference tracker

F12 go-to-definition, Shift+F12 find references, hover tooltips, docked cross-reference tree — role-aware for cells, surfaces, materials, universes, fill, and trcl.

MCNP line-length guard

Column-80 ruler, Problems-panel overlength diagnostics, invisible-character toggle.

3D geometry preview

PyVista/VTK instanced rendering: component/material/axial toggles, Auto/Disc/Layers fidelity, axial slice, solo/isolate, BEAVRS radial structure, hover inspect, distance/angle/radius tools, 1.5M instance budget.

Input Builder + lattice

Snippet wizards for materials, surfaces, cells, sources, and settings — plus an integrated Lattice tab with a visual pin-map grid editor (W 17×17 / BWR presets). Toolbar and menu Lattice Builder shortcuts open Input Builder on the Lattice tab.

Prebuilt models

BEAVRS Cycle-1 full core (193 assemblies) and 17×17 assembly starters for all four codes; reflected UO₂ pin-cell teaching decks.

Cross-code converter

Hi-fi MCNP→OpenMC (OWEN v0.3.8 parity): boolean regions, macrobodies, universes/lattices, graveyard→vacuum, S(α,β), tmp, kcode/ksrc, FMESH + F4/F6/F7; legacy fallback; MCNP→Serpent/SCONE experimental.

OpenMC geometry verify

Overlap scan (slice plots with show_overlaps) and lost-particle probe via your Python install — validate converted decks before you run.

Run simulation

Launch MCNP, OpenMC, Serpent, or SCONE from the editor; live output stream; configurable executable paths in Settings.

Parametric sweep

JSON sweep manifest, per-run input mutation, output capture, k-eff parsing, TSV summary, and matplotlib sweep dashboard over run directories.

Results viewer

k-eff convergence, flux spectrum (log-log), tally table, mesh-tally heatmap — parsers for OpenMC statepoint, MCNP mctal, Serpent _det.m, SCONE outputs.

ALLEN cross-sections

Toolbar ALLEN opens the embedded matplotlib σ(E) panel — v1.3.7 adds non-blocking async load, disk cache, and progressive curve fetch; Doppler Studio (multi-temperature overlay, RI readout). GROVES menu adds ALLEN in Browser for reactormc.net/nrdp/allen. Nuclides inferred from the active deck.

PNNL-15870 materials

Insert PNNL Material picker — 411 Rev. 2 compendium entries with per-code card preview (MCNP, OpenMC, Serpent, SCONE).

Menu UX (source)

GROVES menu grouped into Validate, Build, Simulate, Tools, and Settings; tab-required actions gray out when no editor tab is open; 3D Geometry Preview switches the main 3D Preview tab.

Templates & themes

Bundled starters: pin cell, assembly, quarter-core, BWR bundle. Seven UI themes — Dark (default), Marble, Rome Marble, Gold, Ocean, Forest, Slate — in Settings and the toolbar.

Settings

Highlight palette, line-length limit, solver executable paths, and theme selection in one dialog.

Community Library

Opt-in Supabase community model browser — disabled by default; fully offline when not enabled.