Radioactive energy as an alternative energy source?

In summary, the idea is that you could use a nuclear power plant to generate energy from radioactive emissions.
  • #1
tbokat07
1
0
I am new to this forum, and I am not a physics major. I simply had a thought earlier today of why radioactive energy, in particular gamma rays, can't be converted into usable energy. If some gamma rays are emitted as photons, couldn't one simply use solar panels as a means of capturing the energy? If this is a ridiculous question I'm sorry, I was curious of why or why not this can be done.
 
Physics news on Phys.org
  • #2
Where would you get those gamma rays? There's no abundant source of gamma rays on the planet.

It's possible to produce small quantities of radioactive elements and package them into mini-batteries. It's expensive and there are obvious safety issues, but you get a reliable long-lasting energy source. They are usually used for spacecraft . Voyager-1 deep space probe is powered by one of those, it was launched in 1977 and it's still working.
 
  • #3
voyager had effience of around 5% or something like that ;-)
 
  • #4
RTG's (like the one used on Voyager I and II, Pioneer 12, etc.) DO use a radioactive source for energy conversion. In this case, the gamma/beta/alpha kinetic energy is converted to heat (by many many collisions with a shield or the source itself), and this heat is used to run a thermionic diode.

The trouble with this method is that you need a LOT of a radionuclide to make it work...something which makes it very dangerous for use around living things. So, these RTG's are rather dangerous, and expensive to make (unless you make it from reprocessed nuclear waste, then it's slightly less expensive than making the isotope in a research reactor).

That being said, geothermal energy is a manifestation of natural radioactive decay. So, if you want to, you could claim your geothermal plant was really an elegant natural RTG system :)
 
  • #5
One could try to isolate caesium-137 from nuclear waste. Pure Cs-137 would probably be red hot due to the radioactive decay, so you can imagine using it as a heat source. You could think of using it in powerplants in the steam reheating stage, or simply to produce hot water.

After a few decades, the power will diminish and then you can recycle the material.
 
  • #6
In a betavoltaic battery, a beta emitter (beta particle is an electron) is used to generate free electrons. The primary beta particles strike a target of suitable design and a shower of secondary, lower energy beta particles are generated. These secondary beta particles are directed to a conductor and there you have it... a battery powered by radionuclides. I have seen carbon-14 tried (http://patft.uspto.gov/netacgi/nph-...clide&RS=IN/"young,+robert"+AND+radionuclide").
 
Last edited by a moderator:
  • #7
Count Iblis said:
One could try to isolate caesium-137 from nuclear waste. Pure Cs-137 would probably be red hot due to the radioactive decay, so you can imagine using it as a heat source.
You could also burn diamonds!
Ceasium isn't cheap and extracting it from waste would be even more expensive.

The cheapest way of using radiation as an energy source is to drill down into some granite, pump in cold water and use the hot water that comes out.
 
  • #8
tbokat07 said:
I am new to this forum, and I am not a physics major. I simply had a thought earlier today of why radioactive energy, in particular gamma rays, can't be converted into usable energy. If some gamma rays are emitted as photons, couldn't one simply use solar panels as a means of capturing the energy? If this is a ridiculous question I'm sorry, I was curious of why or why not this can be done.

It would even be better if we could control the "radioactive reaction": that is, by doing things which makes the stuff react or not. For instance, there are substances that undergo kind of radioactive processes which give off a lot of energy when they get irradiated with neutrons. Of course, the problem is to make the neutrons, but it happens that the same reaction also produces neutrons. So hey, if we do it clever, we could use those neutrons to irradiate the stuff itself, then the thing would be giving off energy by itself, and we can stop it when we remove enough neutrons... I'm going to patent this invention !

Uh, the stuff already exists, it is a nuclear power plant...
 

1. What is radioactive energy?

Radioactive energy is a form of energy that is produced through the decay of radioactive materials, such as uranium or plutonium. This process releases heat, which can then be converted into electricity.

2. How is radioactive energy different from other alternative energy sources?

Unlike other alternative energy sources like solar or wind power, radioactive energy does not rely on weather conditions. It also has a much higher energy density, meaning that a small amount of radioactive material can produce a large amount of energy.

3. Is radioactive energy safe for the environment?

Radioactive energy does produce nuclear waste, which can be harmful to the environment if not properly disposed of. However, advancements in technology have allowed for safer and more efficient ways to store and dispose of nuclear waste. Compared to other forms of energy, radioactive energy also has a smaller carbon footprint.

4. Are there any risks associated with using radioactive energy?

While there are some risks associated with using radioactive energy, such as the potential for accidents or leaks, these risks can be minimized through strict safety protocols and regulations. Additionally, advancements in technology have made nuclear power plants much safer than they were in the past.

5. Is radioactive energy a renewable energy source?

While the radioactive materials used in nuclear power plants are not renewable, they are considered a sustainable energy source. This is because a small amount of these materials can produce a large amount of energy, and they can be recycled and reused. Additionally, there is ongoing research and development into alternative fuels for nuclear power that could potentially make it a fully renewable energy source in the future.

Similar threads

  • High Energy, Nuclear, Particle Physics
Replies
6
Views
1K
Replies
1
Views
979
  • High Energy, Nuclear, Particle Physics
Replies
15
Views
2K
  • High Energy, Nuclear, Particle Physics
Replies
8
Views
1K
  • Other Physics Topics
Replies
7
Views
1K
Replies
14
Views
910
  • Other Physics Topics
Replies
9
Views
1K
  • Introductory Physics Homework Help
Replies
9
Views
2K
  • General Engineering
Replies
27
Views
3K
  • Sci-Fi Writing and World Building
Replies
6
Views
538
Back
Top