Radiation

Radiation intensity appears on screen when under the effects of radiation, due to being near a radioactive source.

Radiation refers to the effects of radioactive items and objects in the game, which cause damage to the pioneer unless a Hazmat Suit is worn. While radiation is in effect, the screen will become slightly distorted, Geiger counter noises will be heard and a radiation intensity bar will appear in the upper part of the screen.

Radiation effects are caused by being in proximity to radioactive sources. Radiation does not linger (except due to bugs).

Radioactive sources

Each radioactive source has a ItemDecay value, which determines how strongly it emits radiation:

Item	ItemDecay	Stack ItemDecay
Uranium Resource Node	10000	10000
Uranium resource deposit	15 × Uranium contained (usually 54~66)	~900 (varies)
Uranium	15	1500
Encased Uranium Cell	0.5	100
Uranium Fuel Rod	50	2500
Uranium Waste	10	5000
Non-Fissile Uranium	0.75	375
Plutonium Pellet	20	2000
Encased Plutonium Cell	120	24000
Plutonium Fuel Rod	250	12500
Plutonium Waste	200	100000
Ficsonium	250	25000
Ficsonium Fuel Rod	1000	50000

Due to having both a very high ItemDecay value and a stack size of 500, Plutonium Waste has the highest density of radiation per inventory slot.

All sources of radiation glow in the dark.

Radiation levels

The formula for calculating the radiation level (intensity) is: $\frac{\mathsf{I}\mathsf{t}\mathsf{e}\mathsf{m}\mathsf{C}\mathsf{o}\mathsf{u}\mathsf{n}\mathsf{t}\times \mathsf{I}\mathsf{t}\mathsf{e}\mathsf{m}\mathsf{D}\mathsf{e}\mathsf{c}\mathsf{a}\mathsf{y}\times e^{-x/\mathsf{R}\mathsf{a}\mathsf{d}\mathsf{i}\mathsf{a}\mathsf{t}\mathsf{i}\mathsf{o}\mathsf{n}\mathsf{F}\mathsf{a}\mathsf{l}\mathsf{l}\mathsf{O}\mathsf{f}\mathsf{f}\mathsf{D}\mathsf{i}\mathsf{s}\mathsf{t}\mathsf{a}\mathsf{n}\mathsf{c}\mathsf{e}}}{4\pi x^2}$

Where:

• $\mathsf{I}\mathsf{t}\mathsf{e}\mathsf{m}\mathsf{C}\mathsf{o}\mathsf{u}\mathsf{n}\mathsf{t}$ = Number of items. So 2 stacks of Uranium counted as 200.
• $\mathsf{I}\mathsf{t}\mathsf{e}\mathsf{m}\mathsf{D}\mathsf{e}\mathsf{c}\mathsf{a}\mathsf{y}$: Refer to the table above.
• $e\approx 2.71828$ (Constant Euler's number)
• $\mathsf{R}\mathsf{a}\mathsf{d}\mathsf{i}\mathsf{a}\mathsf{t}\mathsf{i}\mathsf{o}\mathsf{n}\mathsf{F}\mathsf{a}\mathsf{l}\mathsf{l}\mathsf{O}\mathsf{f}\mathsf{f}\mathsf{D}\mathsf{i}\mathsf{s}\mathsf{t}\mathsf{a}\mathsf{n}\mathsf{c}\mathsf{e}=80$ (Constant)
• $x$ = Distance between the player and the item, in meters

Radiation intensity for multiple radioactive sources, such as items in different containers, are summed scalar in 3D. After the summation, the intensity level is then capped between 0.2 (0.44% radiation damage) and 45 (100% radiation damage). A pioneer will not receive any damage below 0.2 intensity. Beyond 45, the radiation damage is capped, which at this intensity, kills the pioneer in 5 seconds or consumes the Iodine Infused Filter at a maximum rate of 1 per 12 seconds. In-between, the filter lasts proportionally longer as the radiation intensity decreases. The radiation intensity bar in the game screen is capped at 26.7% radiation damage.

Items closer than 0.5 meters or in the inventory are counted as x = 0.5 meters.

The calculation applies to all radiation sources:

• Resource nodes and resource deposits
• Items on Conveyor Belts or the ground
• Items in buildings with any inventory slots, such as:
  • Miners
  • Production buildings
  • Storage Containers, Industrial Storage Containers or Personal Storage Boxs,
• Items carried in the player inventory or a Lizard Doggo
• Death and dismantle crates

Radiation effects apply only to pioneers. Other creatures, including Lizard Doggos carrying a radioactive item, are immune.

Protection

In Tier 7, a Hazmat Suit can be unlocked via its respective milestone. Having the suit with Iodine Infused Filters on will protect the pioneer from Radiation damage. As the suit requires Alclad Aluminum Sheets to craft, it is required to complete the Bauxite Refinement milestone first.

Entering any vehicle also stops the pioneer from taking radiation damage.

Foundations, walls, terrain and water do not reduce radiation levels by any means.

Tips

• Be careful when hand-mining Uranium deposits, as Uranium in the inventory can kill the pioneer quickly.
• Any Uranium Ore in the Inventory can be dragged to the inventory trash slot which will stop any radiation. However, Uranium Waste and its products, excluding Plutonium Fuel Rods, but including Plutonium Waste, cannot be discarded using the inventory trash slot.
• Area radiation is often calculated when a save is loaded, which leads to a bug where mining Uranium deposits will not clear the area of radiation. In order to clear the radiation level of an area, clear the Uranium deposits, save the game (after clearing the inventory), and reload the save. This will recalculate the radiation level of the area, clearing the area of radiation if there are no radiation sources remaining nearby.
• If using the Dimensional Depot Uploader and have access to the Dimensional Depot you can send any radioactive part from your Inventory to the Dimensional Depot which will stop all radiation.

Current issues

• Sorting the inventory or a Storage Container will cause the radiation to persist even after radioactive items are removed. This lasts until the game is reloaded (or the Storage Container is dismantled).
• Radiation of Uranium deposits will persist until the save is reloaded, even after a deposit is completely destroyed.

History

• Patch 0.4.0.11: Updated radiation levels to fit new item production rates.
• Patch 0.4.0.0: Tweaked the radiation decay value for Uranium Waste