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Radiation and Fallout
Radiation in Atomcraft builds up as a dose over time. Short exposure is fine, staying too long makes you sick, and a lot of it kills you.
Every second, the mod adds up the radiation around you in RAD/s and adds it to your dose in RAD. Your body recovers 0.1 RAD per second on its own. The dose can't go above 2000 RAD.
Radiation comes from:
- Contaminated area: chunks hit by a nuclear explosion or a fallout cloud
- Black rain: up to 3 RAD/s while you're under open sky
- Standing in fallout or on trinitite
- Radioactive items in your inventory
- Radioactive sources nearby: chests, barrels or machines with radioactive items, and the fuel of a running reactor
- Contaminated food when you eat it
In creative and spectator mode you don't get any symptoms.
| Dose | What happens |
|---|---|
| 100 RAD | Occasional headaches and dizziness (nausea) |
| 200 RAD | Hunger |
| 250 RAD | Vomiting. Gets more frequent the higher your dose. You lose food and saturation. |
| 400 RAD | Weakness |
| 600 RAD | Radiation Sickness: regular damage |
| 650 RAD | Your hair falls out (just a message, it grows back below 300 RAD) |
| 800 RAD | Mining fatigue, radiation sickness II |
| 1000 RAD | Radiation sickness III |
The symptoms roughly follow real acute radiation sickness.
Carrying these gives you radiation. The values are per item, so a full stack adds up fast.
| Item | RAD/s per item |
|---|---|
| Plutonium Core | 0.3 |
| Spent Fuel Rod | 0.25 |
| Nuclear Waste | 0.15 |
| Plutonium | 0.1 |
| Enriched Uranium | 0.08 |
| Uranium Fuel Rod, MOX Fuel Rod | 0.05 |
| Trinitite | 0.04 |
| Uranium Ingot, Radioactive Fallout | 0.02 |
| Raw Uranium | 0.01 |
The same items also radiate when they're in a chest, barrel or machine. Sources like that reach about 10 blocks. Radiation drops off with the square of the distance.
The Nuclear Waste Barrel is the exception. Anything inside it doesn't radiate at all.
Blocks between you and a source block part of the radiation. How much gets through each block:
| Block | Gets through |
|---|---|
| Lead (block, bricks, stairs, slabs, walls) | 6 % |
| Lead Glass | 20 % |
| Reactor casing and other reactor parts | 25 % |
| Reactor Lead Glass, Bunker Door | 30 % |
| Reinforced Concrete, Concrete Tiles (and stairs, slabs, walls) | 45 % |
| Water | 50 % |
| Steel Tread Plate, Armored Glass | 60 % |
| Any other solid block | 85 % |
| Non-solid blocks | 95 % |
This stacks. Two blocks of reinforced concrete let through 0.45 × 0.45, about 20 %.
Area radiation (contaminated ground, fallout around you) comes from all sides and from above, not from below. The mod checks the blocks around you and above you up to 8 blocks away. Under open sky you get the full dose. Inside a lead bunker you only get a few percent. Under reinforced concrete or deep underground it's a fraction.
So after an explosion, go inside and stay there.
| Piece | Blocks |
|---|---|
| Hazmat Helmet | 25 % |
| Hazmat Suit | 35 % |
| Hazmat Pants | 25 % |
| Hazmat Boots | 10 % |
| Full set | 95 % |
The suit doesn't help against contaminated food.
Removes 400 RAD of dose and cures radiation sickness. Two bottles per craft (glass bottle, golden carrot, redstone, sugar).
Hold it to see the radiation around you, what you're absorbing and your total dose on screen. Right-click for a reading in chat. It clicks faster the more radiation there is.
Wherever the radiation is above 0.15 RAD/s:
- Plants grow badly and can wither and die
- Crops, meat from animals, fish and anything else edible that drops there is marked Contaminated
Contaminated food shows the dose in its tooltip. Eating it adds 15 RAD for every RAD/s of radiation where it came from, up to 300 RAD. The hazmat suit doesn't protect against that.
Every nuclear explosion creates a fallout cloud over ground zero. It drifts with the wind, gets up to three times wider and thinner, and drops radiation on the chunks below. After about 10 minutes it's gone. Up to 16 clouds can exist at once.
The wind slowly changes direction and speed over time (about 1 to 6 blocks per second) and is different in every world. The command center shows the current wind and where the fallout clouds are.
Starts about 75 seconds after a nuclear explosion and lasts until about 10 minutes after, inside the fallout zone. Under open sky it gives up to 3 RAD/s, and it washes fallout into the ground, so the chunk stays more contaminated for longer.
Area radiation has a half-life of 30 minutes real time by default. At ground zero of a Little Man you start at 40 RAD/s, so it takes a few hours until it's safe again. Fat Man doubles that, Mark 6 triples it, and a reactor meltdown is the worst at 3.5 times. You can change the half-life and the peak in the config.
Basics
Weapons
Command and Control
Aftermath
Nuclear Power
Other