![]() ![]() Approximately equivalent to the minimum daily load.īecquerel: The SI unit of intrinsic radioactivity in a material. The positive charges on the protons are balanced by a number of negatively-charged electrons in motion around the nucleus.īackground radiation: The naturally-occurring ionising radiation which every person is exposed to, arising from the Earth's crust (including radon) and from cosmic radiation.īase load: That part of electricity demand which is continuous, and does not vary over a 24-hour period. Atoms have a nucleus consisting of positively-charged protons and uncharged neutrons of almost the same mass. Alpha particles are helium nuclei, with 2 protons and 2 neutrons.Ītom: A particle of matter which cannot be broken up by chemical means. This is the optimisation principle of radiation protection.Īlpha particle: A positively-charged particle emitted from the nucleus of an atom during radioactive decay. Expressed in becquerels.ĪLARA: As Low As Reasonably Achievable, economic and social factors being taken into account. in the steel of a reactor core) which has been created by neutron bombardment.Īctivity: The number of disintegrations per unit time inside a radioactive source. Minor actinides are americium, curium and neptunium.Īctivation product: A radioactive isotope of an element (e.g. They are therefore significant in wastes arising from nuclear fission, e.g. Actinides are radioactive and typically have long half-lives. ![]() Usually applied to those above uranium – 93 up (also called transuranics). Index A B C D E F G H I L M N O P R S T U V W Y ZĪctinide: An element with atomic number of 89 (actinium) to 103. The following is a list of terms commonly used in discussion of nuclear energy. ![]()
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