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Nuclear Craft UPdated

A modern port of NuclearCraft for 1.21 featuring advanced nuclear reactors, realistic fuel processing, and complex radiation mechanics for high-tech gameplay.

File Details

NuclearCraft-1.21.1-1.4.0.jar

  • B
  • May 2, 2026
  • 17.44 MB
  • 125
  • 1.21.1
  • NeoForge

File Name

NuclearCraft-1.21.1-1.4.0.jar

Supported Versions

  • 1.21.1

Curse Maven Snippet

NeoForge

implementation "curse.maven:nuclear-craft-updated-1489663:8023966"
Curse Maven does not yet support mods that have disabled 3rd party sharing

Learn more about Curse Maven

NuclearCraft Fork v1.4.0 — Transuranic Expansion
Fission chain saturated from Thorium through Einsteinium.
Isotopes

Registered 75+ new isotopes across Z=81–99 (Tl, Pb, Bi, Po, At, Rn, Fr, Ra, Ac, Pa, and full transuranic coverage)
All three natural decay series (U-238, U-235, Th-232) now trace completely to stable lead

Fuels

Added fuel groups for all 9 transuranic elements through Einsteinium-254
New fuels include Pu-236, Cm-240, Es-254 (fusion gate) and complete coverage of Bk, Cf tiers

Machines

Decay Hastener: complete natural series + all transuranic branch decays
Irradiator: full Th-230 → Es-254 neutron capture chain
Fuel Reprocessor: all new fuel groups with physically-grounded output distributions
Target Chamber: probabilistic spallation outputs for all heavy targets

Textures

405 new isotope textures generated via dye-sprite pipeline, element-colored with mass-based hue shift
Existing hand-authored textures preserved

Infrastructure

Fixed datagen codec round-trip crash (configs not loaded during datagen)
Fixed JEI/JER runtime dependency for datagen
Resolved all duplicate recipe ID collisions in branch decay and alternate irradiation paths

Performance

Fixed AbstractRecipe.getItemIngredients() allocating a new NonNullList on every call — now cached on first build, eliminating the primary allocation hotspot when clicking isotope-heavy JEI categories (decay hastener, fuel reprocessor, irradiator)
Fixed ProcessorCategoryWrapper rebuilding slot drawables and progress background on every recipe view — all four slot drawable types and per-duration progress backgrounds now allocated once per category instance and reused
Both fixes are upstream bugs made critical by the expanded isotope registry; pre-existing with small registries, severe at 400+ isotopes