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Mekanism Fission Reactor (ATM10)

Overview

The Fission Reactor is a multiblock structure in Mekanism used to generate large amounts of power by burning nuclear fuel. It produces heat, which converts water into steam for power generation, and generates nuclear waste as a by-product.

Requirement

Reactor Components

  • Fission Reactor Casing
  • Fission Reactor Port
  • Fission Fuel Assembly
  • Control Rod Assembly
  • Reactor Glass (optional)

Supporting Systems

Coolant Supply

A constant water source is required:

  • Sink (recommended)
  • Mechanical Pipes (The longer the pipes, the more water is available to pump into multiblock)
  • Eternal Water Block (EvilCraft)

Fuel Production

Fission Fuel must be produced through a chemical chain:

  • Uranium → Uranium Hexafluoride → Fission Fuel

Required machines:

  • Chemical Oxidizer
  • Chemical Infuser
  • Isotopic Centrifuge

Waste Handling

  • Pressurized Tubes
  • Radioactive Waste Barrel (temporary storage)

Structure

Minimum Size

  • 5×5×5 (recommended starting size)

Construction Steps

1. Build the Outer Casing

Construct a 5×5×5 hollow cube using Fission Reactor Casing.

2. Install Internal Components

Inside the structure:

  • Place Fission Fuel Assemblies vertically
  • Place Control Rod Assemblies directly on top of each fuel assembly

3. Add Ports

Install the following ports on the reactor casing:

  • Fuel Input Port
  • Coolant Input Port
  • Steam Output Port
  • Waste Output Port

Additional ports can be added as needed.

4. Optional: Reactor Glass

Replace casing blocks with Reactor Glass for visibility.

Setup

Coolant Input

  • Connect water supply to the Coolant Input Port
  • Ensure constant flow

Fuel Input

  • Pipe Fission Fuel into the Fuel Input Port

Steam Output

  • Extract steam from the Steam Output Port
  • Recommended: connect to an Industrial Turbine

Waste Output

  • Extract nuclear waste via Waste Output Port
  • Store in Waste Barrels or process later

Activation

  1. Enable the reactor
  2. Confirm:
    • Water is flowing
    • Waste output is connected

Power Increase

Gradually increase burn rate slowly

  • Temperature: below 800 K
  • Burn Rate: 0.5–2.0 mB/t (early setup)

Power Generation

Industrial Turbine (Recommended)

  • Converts steam into energy efficiently
  • Required for optimal performance

Without a turbine, most generated energy is wasted.

Safety

Meltdown Causes

  • Insufficient coolant
  • Excessive burn rate
  • Waste backup
  • Blocked output systems

Safety Guidelines

  • Maintain constant water supply
  • Ensure waste is continuously removed
  • Increase burn rate gradually
  • Monitor reactor temperature

Scaling

To increase output:

  • Increase burn rate slowly
  • Add more fuel assemblies
  • Expand reactor size (e.g. 7×7×7 or larger)

Common Mistakes

  • Activating reactor at high burn rate
  • Failing to supply enough coolant
  • Ignoring waste management
  • Not using a turbine

Recommended Starter Setup

  • 5×5×5 reactor
  • 4–6 fuel assemblies
  • Burn rate ~1.0 mB/t
  • Connected industrial turbine
  • Infinite water source
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