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# Uranium Energy per Kg

Discussion in 'Survival' started by Tahvohck, Dec 27, 2014.

This last post in this thread was made more than 31 days old.
1. ### TahvohckTrainee Engineer

Messages:
41
This is honestly mostly just so that I don't have to recalculate it every time I want it, but here goes:
Since this page has incorrect data for the MWh/kg of uranium ingots, I've done some testing myself to determine what the proper values were. I shut down the biggest energy hogs on the Red ship and loaded one of the reactors with 1 decigram of uranium, resulting in 14.7 kW draw for 24 seconds. Total data was:
Code:
```[FONT= courier new]System load: 14.7 kW
Fuel amount:  0.1 g
Fuel time:   24   sec

kWh/kg:    980
kWh/L:  18,846[/FONT]```
There's obviously chance for some error in here, given how I can't read the exact wattage draw of the system, but since the kWh/kg value came out so perfectly (I didn't round any digits off) I suspect that it's spot on. This works out to just under 63 days of run time for a full large ship large reactor at full power.

2. ### DivineWrathJunior Engineer

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531
I got roughly 960 kWh/kg (or 3,456,000 kW/kg) on my tests. Nice to see that your results are similar to mine. It adds confidence.

On my tests, I use multiple platforms with refineries. I use refineries because I know how much energy they consume (560 kW active, 1 kW idle). I put in a controlled amount of power, such as a fully charged battery or a reactor with 10 kg of fuel. I then throw in 1 k of iron or something (platinum or uranium if I got time to burn) and then measure the results. With batteries, I can determine the energy used, and with reactors I can determine how fuel is consumed by doing the same work. Then I do the math.

Last edited by a moderator: Dec 27, 2014
3. ### DivineWrathJunior Engineer

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531
I did some more math. Namely to determine how much energy that one needs to be diverted to uranium refining in order to power all other systems. 1 Uranium ingot will have enough power to refine about 11.68 Uranium ingots. A little less than 9% of all energy needs to be put back into Uranium refining to sustain a pure Uranium build. Basically, if you have 11 refineries, 1 must be for Uranium only.

I haven't tested it yet. I might do so later.

4. ### RockSliceTrainee Engineer

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39
I've thought for a while that the in-game numbers for Uranium use are a bit unrealistic. Real-world refined uranium has an energy density of around 22,000 MWh.

The game balance seems decent, but the numbers could do with a decimal point shift.

5. ### MegaMinerJunior Engineer

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625
Well, lots of stuff surrounding U is unrealistic. The missiles that use 0.5 Kg should do roughly 1/10th the damage of the Hiroshima bomb, which is to say everything within 1 km should be vaporized. Even assuming inefficient conversion to to non-critical mass detonation through some means like a neutron gun, it would still be a lot larger than now. Ore yields are also very low, real yellowcake (U2O3) is about 95% U. The U-238 can be easily made into Pu-239 so you get nearly 95% usable material for weapons manufacturing.

I often chuckle when my character is carrying enough U to make 10 atomic bombs around without suffering health problems like a 500 million degree fever.

Last edited by a moderator: Jan 2, 2015
6. ### HeavylinkTrainee Engineer

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83
On the Energy consumption i cannot provide any feedback.

But you are forgetting one thing ppl.
Explosions is space behave differently then on Earth. (Please google Atmospheric Pressure)
A nuke would behave very differently when detonated in space.

7. ### Donziboy2Trainee Engineer

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42
Your forgetting all the heat produced Heavylink.

And yes the Hiroshima bomb was detonated above ground and the shock wave did a lot of damage, but the heat produced also set the entire city on fire.

8. ### DeadNeuronTrainee Engineer

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32
Hahaha, I know what you mean, like when transferring U from one reactor to other

9. ### REDSHEILDJunior Engineer

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888
Well, on top of how nukes work differently in space (very differently), I think the missiles just use the uranium in them as a penetrator.

10. ### cha0ticTrainee Engineer

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23
i always assumed the uranium for the rockets was for the thruster