[
  {
    "group": "uranium",
    "name": "heu-233",
    "forge_energy": 46080,
    "heat": 360,
    "criticality": 39,
    "depletion": 133,
    "efficiency": 115,
    "isotopes": [233, 238]
  },
  {
    "group": "uranium",
    "name": "heu-235",
    "forge_energy": 38400,
    "heat": 300,
    "criticality": 51,
    "depletion": 240,
    "efficiency": 105,
    "isotopes": [235, 238]
  },
  {
    "group": "uranium",
    "name": "leu-233",
    "forge_energy": 11520,
    "heat": 60,
    "criticality": 78,
    "depletion": 133,
    "efficiency": 110,
    "isotopes": [233, 238]
  },
  {
    "group": "uranium",
    "name": "leu-235",
    "forge_energy": 9600,
    "heat": 50,
    "criticality": 102,
    "depletion": 240,
    "efficiency": 100,
    "isotopes": [235, 238]
  }
]