Nuclear fusion technology is primarily used for energy production and space propulsion. Medical imaging is not a direct application of nuclear fusion.

Nuclear fusion offers several advantages over fossil fuels, including reduced greenhouse gas emissions, an abundant fuel supply, and high energy density.

Radioactive waste disposal is not a major challenge associated with nuclear fusion technology. The primary challenges are related to achieving and maintaining high temperatures, managing neutron activation, and producing tritium fuel.

Deuterium-tritium is the most promising fuel for nuclear fusion reactors due to its relatively low ignition temperature and high energy output.

The European Union is currently leading the development of nuclear fusion technology through its ITER project, which aims to demonstrate the feasibility of nuclear fusion as a viable energy source.

ITER is the largest nuclear fusion reactor currently under construction. It is a collaborative project involving 35 countries and is located in Cadarache, France.

The primary purpose of the ITER project is to demonstrate the feasibility of nuclear fusion as a viable energy source by achieving and sustaining a burning plasma for extended periods of time.

The ITER project is expected to be completed by 2035, with first plasma expected in 2025 and deuterium-tritium operation planned for 2035.

Nuclear fusion technology is not expected to provide low-cost electricity in the near future. The cost of constructing and operating nuclear fusion reactors is likely to be high.

The primary challenge associated with the development of space propulsion systems based on nuclear fusion is the weight and size constraints imposed by spacecraft design.

Nuclear fusion technology is not directly used for medical imaging. However, it is used to produce radioisotopes that are used in medical imaging procedures.

The primary challenge associated with the development of nuclear fusion technology for hydrogen production is the efficiency of the process. Nuclear fusion reactors need to be able to produce hydrogen at a rate that is economically viable.

Nuclear fusion technology is not expected to produce significant amounts of radioactive waste. However, the materials used in nuclear fusion reactors may become activated and require careful management.

The primary challenge associated with the development of nuclear fusion technology for electricity generation is the compatibility of materials with the high temperatures and neutron fluxes encountered in fusion reactors.