Nuclear fission is the process by which the nucleus of an atom is split into two or more smaller nuclei, releasing a great amount of energy.

Nuclear fusion is the process by which two or more atomic nuclei combine to form a single heavier nucleus, releasing a great amount of energy.

Radioactive decay is the process by which an atomic nucleus loses energy by emitting radiation in the form of alpha particles, beta particles, or gamma rays.

The becquerel (Bq) is the SI unit of radioactivity, defined as the activity of a radioactive source that has one disintegration per second.

The maximum amount of radiation that a person can be exposed to in a year is 100 millisieverts (mSv).

The most common type of nuclear reactor is the Pressurized Water Reactor (PWR), which uses ordinary water as both the coolant and the moderator.

The fuel used in most nuclear reactors is uranium, plutonium, or thorium, all of which are radioactive elements.

The waste product of nuclear fission is spent nuclear fuel, radioactive waste, and nuclear waste, all of which are hazardous and must be disposed of safely.

The most common method of nuclear waste disposal is deep geological disposal, which involves burying the waste deep underground in a stable geological formation.

The main environmental concern associated with nuclear energy is the release of radioactive materials into the environment, which can pose a health risk to humans and other living organisms.

The main economic concerns associated with nuclear energy are the high cost of construction and operation, the long lead times for construction, and the uncertainty of future electricity prices.

The main social concerns associated with nuclear energy are the risk of nuclear accidents, the proliferation of nuclear weapons, and the ethical issues surrounding the use of nuclear energy.

Nuclear energy is expected to continue to be a major source of electricity in the future, although its role may decline somewhat as renewable energy sources become more competitive.

The nuclear energy industry faces a number of challenges, including the high cost of construction and operation, the long lead times for construction, the uncertainty of future electricity prices, the risk of nuclear accidents, the proliferation of nuclear weapons, and the ethical issues surrounding the use of nuclear energy.

The nuclear energy industry has a number of opportunities, including the growing demand for electricity, the increasing cost of fossil fuels, the development of new nuclear technologies, and the increasing public acceptance of nuclear energy.