Japan wants to build its own fusion reactor

© APA/AFP/CHINESE ACADEMY OF SCIENCES/HANDOUT / HANDOUT

Fumio Kishida

Japan is also currently working with the United States and other countries on

International Thermonuclear Experimental Reactor (ITER) , currently under construction in France. China is also doing research with its “artificial sun” at the nuclear fusion.

Clean energy hopeful

Nuclear fusion is considered a beacon of hope for clean Energy of the future

. In theory, this means that an almost unlimited amount of environmentally friendly electricity can be generated. Unlike fission in nuclear power plants, where the bonds between atomic nuclei are broken to generate energy, the fusion process fuses two atomic nuclei together to form a new nucleus. Waste products such as

There is no nuclear waste

. Extremely high temperatures of up to

150 million degrees

necessary – ten times the heat of the sun. The plasma, which is so heated, has to be kept in check by an extremely strong magnetic field, because it would melt any material.

It is produced in a ring-shaped vacuum chamber, a so-called Tokamak

. When nuclear fusion is running, so much heat is generated that the 150 million degrees Celsius can be maintained by itself. Some of the heat is diverted to vaporize water, which drives a steam turbine. This generates electricity. The energy requirement of the magnetic field is covered with a part, the majority flows into the power grid.

Currently the process is

not yet efficient enough

, which is why I’m still working on it extensively is being researched.

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