Rol van Fossiele bronnen: rapport - Instituut Samenleving en ...

developments can be expressed by allocating appropriate quantities of reserves
to the probable and possible classifications.
Unrecoverable Resources
– Voorkomens waar geen winning plaats kan vinden
The portion of discovered or undiscovered petroleum-initially-in-place quantities
not currently considered to be recoverable. A portion of these quantities may
become recoverable in the future as commercial circumstances change,
technological developments occur, or addition data is acquired.
Upstream
The exploration and production portions of the coal, oil and gas industry.
A.2 Glossary uranium mining
Activity – Activiteit
The number of disintegrations per unit time inside a radioactive source.
Expressed in becquerels.
ALARA
As Low As Reasonably Achievable, economic and social factors being taken into
account. This is the optimisation principle of radiation protection.
Background radiation – Achtergrondstraling
The naturally occurring ionising radiation which every person is exposed to,
arising from the earth's crust (including radon) and from cosmic radiation.
Becquerel
The SI unit of intrinsic radioactivity in a material. One Bq measures one
disintegration per second and is thus the activity of a quantity of radioactive
material which averages one decay per second (in practice, GBq or TBq are the
common units).
Decay – Verval
Disintegration of atomic nuclei resulting in the emission of alpha or beta particles
(usually with gamma radiation). Also the exponential decrease in radioactivity of
a material as nuclear disintegrations take place and more stable nuclei are
formed.
Enriched uranium – Verrijkt uranium
Uranium in which the proportion of U-235 (to U-238) has been increased above
the natural 0.7%. Reactor-grade uranium is usually enriched to about 3.5%
U-235, weapons-grade uranium is more than 90% U-235.
Half-life – Halfwaardetijd
The period required for half of the atoms of a particular radioactive isotope to
decay and become an isotope of another element.
Zoeken, vinden en winnen
147