Nuclear Contraptions adds 7 new blocks, which can be used to create large multiblock reactors in FTBIC.

This includes the capability of making steam reactors, though fluid transport and steam turbines are not included.

Heat Exchanger Block

This block spreads heat evenly between itself, adjacent reactors, and adjacent heat exchanger blocks.
This block can't spread heat to iridium heat exchangers.
The transfer rate for each block face is 72 heat per tick.
This block can hold up to a maximum of 50,000 heat before exploding.

Iridium Heat Exchanger Block
- Does the exact same thing as the heat vent block, but with higher transfer rates.
- This block can spread heat to iridium heat exchangers, but not normal heat exchangers.
- The transfer rate for each block face is 50,000 heat per tick.
- This block can hold up to a maximum of 100,000 heat, and it won't explode when at capacity.

Coolant Tank

This block holds up to 36 buckets of water, which can be used as coolant by heat vent blocks.

Heat Vent Block

This block takes in heat from adjacent reactors and heat exchangers, and expels heat to adjacent air blocks.
This block can't take in heat from iridium heat exchangers.
The transfer rate for each block face is 5 heat per tick, for both taking in and expelling heat.
If there is an adjacent coolant tank, this block can use its water to convert 1 heat to 4mB of steam, if there's room.
The transfer rate for each block face is 5mB of water per tick, and 1mb of water can make up to 160mB of steam.
For each adjacent air block, this block expels 20mB of steam per tick.
This block can hold up to a maximum of 10,000 heat before exploding.

Overclocked Heat Vent Block

Does the exact same thing as the heat vent block, but with higher transfer rates.
The transfer rate for each block face is 36 heat per tick for taking heat in, and 20 heat per tick for expelling it.
For coolant tanks, the transfer rate is 36mB of water per tick.
For each adjacent air block, this block expels 80mB of steam per tick.

Iridium Heat Vent Block
- Does the exact same thing as the heat vent and overclocked heat vent blocks, but with much higher transfer rates.
- This block can take in heat from iridium heat exchangers, but not normal heat exchangers.
  - The transfer rate for each block face is 5 heat per tick, for both taking in and expelling heat.
- The transfer rate for each block face is 500 heat per tick for taking heat in, and 5,000 heat per tick for expelling it.
- For coolant tanks, the transfer rate is 500mB of water per tick.
- For each adjacent air block, this block expels 20,000mB of steam per tick.
- This block can hold up to a maximum of 100,000 heat, and it won't explode when at capacity.

Steam Chamber

This block takes in steam from heat vents and overclocked heat vents, and spreads it evenly between adjacent steam chambers.
The transfer rate for each block face is 740mB of steam per tick for heat vent blocks, and 800mB of steam per tick for overclocked heat vent blocks.
The transfer rate between each steam chamber is infinite, so it is only limited by the capacity it can hold.
This block can hold up to 1kB of steam, or 1,000,000mB.