How much energy can a kilogram of uranium 235 produce after fission? How long can it be used by humans

Since the advent of human beings, to maintain basic life activities cannot do without the support of energy. In the beginning, everyone used fire to give themselves energy. In modern times, based on the continuous scientific research of some chemical substances, everyone found that nuclear fission and fusion can produce great energy, and experts discovered that nuclear power generation is also based on this. The technology of controllable nuclear fission has been developed.

As everyone knows, the basic principle of making it release energy is to separate the heavy atomic nuclei, and then a great amount of energy will be released. However, in nature, the uranium 235 nucleus is the most easily broken apart. , so it has become the most used fuel. So how much energy can one kilogram of uranium 235 produce after fission? How long will the uranium on earth be available for human use?

The first thing to understand is that the nucleus of uranium 235 is very small, and its total number is ^-14 meters. Therefore, there is no way for us to immediately separate its nucleus, so we choose to use fast neutrons to negatively electron its nucleus to cause fission.

For this matter, experts have researched 5 fission methods, in which it can be seen that the released energy is similar, the average value is 200MeV, 1MeV matches the energy of 1.6 x 10^-13 joules, and each 235 nuclei are fissioned After that, 3.2 x 10^-11 joules of energy will be released.

The mass of one mole of uranium 235 is about 235 grams, so the total number of molecules in one gram of uranium 235 is about 2.56 x 10^21 molecules, and one kilogram of uranium 235 has 2.56 x 10^24 molecules.

It is not difficult to see that after the fission of one kilogram of uranium 235, the calorific value that can be released is 8.2 x 10^13 joules of energy. This sign is calculated by multiplying the energy released by a single atomic nucleus after fission.

The calorific value of one kilogram of coal consumption is about 29307 kcal, so after one kilogram of uranium 235 is fissioned, its energy is equivalent to the energy released by 2798 tons of coal.

From this, it can be seen that nuclear power generation is indeed very powerful. One kilogram of glaze can produce such a large amount of energy. No wonder everyone regards it as a kind of treasure raw material.

How much uranium is there on earth right now? How many years can it be used by humans?

In fact, it is necessary to understand that all resources on earth containing uranium cannot be remanufactured, so its composition is also slowly decreasing.

Moreover, the world has been gradually mining such chemicals, and more than 7 million tons have been discovered.

Among them, uranium-235 only accounts for 0.7%, so experts know according to the calculation that this kind of uranium-235 can only be used by humans for about 80 years.

In response to this kind of situation, human beings wonder if they can use their radionuclides to carry out replacement? In the future, everyone thought that uranium 238 could be used instead, because its share was 99.3%.

In the future, they will want to use the technology of fast neutrons to reproduce nuclear reactors. In other words, a neutron will be injected into its nucleus, and then fission will occur.

And biologists feel that if the technology of fast neutron reproduction nuclear reactor can be developed more fully, then human beings can greatly improve the utilization rate of uranium.

According to the composition of such chemical substances that have been discovered so far, they can be used by humans for about 4,000 years.

What's more, it is necessary to understand that this element is likely to exist in many parts of the world today, so it is very likely that in the future, people will unearth higher compositions of uranium.

For example, the uranium reserves in the deep sea are also very large. According to the survey, there will be 3.3 mg of groundwater per liter of sea surface, so the total output is estimated to be about 4.3 billion tons.

If human beings really grasp the technicality of this kind of fast neutron reproduction nuclear reactor, or if such elements can be extracted from the sea surface, then the glaze on the earth can be used by human beings for tens of thousands of years in the future.

However, some people have clearly put forward the assumption that to understand the behavior of human civilization should be in continuous progress, so in the future everyone should have a large demand for various electric energy sources.

According to this kind of situation, it is very likely that the utilization rate of some chemical substances will increase by more than ten times. Therefore, human beings are also hoping to grasp the technology of controllable nuclear fusion.

The intelligent conversion rate of nuclear reaction is five times higher than that of nuclear fission, and its necessary fuel is hydrogen, the element with the highest evolution rate in the universe. Therefore, relatively speaking, if this technology is mastered, human beings are likely to have lots of energy.

Even so, everyone's technical strength may be relatively limited at present. I believe that one day in the future, the recitation can completely grasp this technicality. At that time, it is very likely that the research level of energy resources on earth will also achieve significant results.