TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

THORIUM 232 [5 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 - external organization data 2011-04-27

English

Subject field(s)
  • Chemistry
  • Nuclear Physics
  • Compartment - Canadian Nuclear Safety Commission
Universal entry(ies)
232Th
symbol
Th232
symbol, obsolete
CONT

Thorium(chemical symbol Th) is a naturally-occurring radioactive metal found at very low levels in soil, rocks, and water. It has several different isotopes, both natural and man-made, all of which are radioactive. The most common form of thorium is thorium-232, found naturally.... Thorium-232 has a half-life of 14 billion(14 x 109) years, and decays by alpha emission, with accompanying gamma radiation. Thorium-232 is the top of a long decay series that contains key radionuclides such as radium-228, its direct decay product, and radon-220.... The half-life of thorium-232 is about 14 billion years.

OBS

thorium-232;232</sup>Th : term and symbol recommended by the International Union of Pure and Applied Chemistry(UIPAC).

OBS

thorium 232; Th232</sup> : obsolete term and symbol.

French

Domaine(s)
  • Chimie
  • Physique nucléaire
  • Tiroir - Commission canadienne de sûreté nucléaire
Entrée(s) universelle(s)
232Th
symbol
Th232
symbol, obsolete
CONT

Les radioéléments primordiaux sont le potassium 40, l'uranium 238 et le thorium 232 qui ont respectivement zéro, treize et dix descendants radioactifs principaux.

OBS

thorium-232;232Th : terme et symbole recommandés par l'Union internationale de chimie pure et appliquée (UICPA).

OBS

thorium 232; Th232 : terme et symbole vieillis.

Spanish

Campo(s) temático(s)
  • Química
  • Física nuclear
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Entrada(s) universal(es)
232Th
symbol
Th232
symbol, obsolete
Save record 1

Record 2 - external organization data 2008-02-22

English

Subject field(s)
  • Chemistry
  • Geochemistry
  • Nuclear Waste Materials
  • Compartment - Canadian Nuclear Safety Commission
DEF

A radioactive, silvery-white, metallic element in group III of the periodic system.

CONT

... uranium and thorium are the dominant elements in discussions about low-level radioactive wastes. They are the "parents" of the "decay chains" of radionuclides ...

OBS

The most stable of its 13 radioactive isotopes(thorium 223 to thorium 235) is thorium 232 which occurs naturally, has a half-life of 1. 4 X 1010 years, emits alpha particles, and is the parent of the thorium disintegration series.... Symbol, Th; valence, 4; isometric; atomic number, 90; atomic weight, 232. 038;...

French

Domaine(s)
  • Chimie
  • Géochimie
  • Déchets nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

Métal blanc, [...] ductile [...] radioactif faisant partie du groupe des actinides.

OBS

Le plus stable de ses 13 isotopes radioactifs (thorium 223 à thorium 235) est le thorium 232 qu'on rencontre dans la nature. Numéro atomique 90, poids atomique 232,038.

Spanish

Campo(s) temático(s)
  • Química
  • Geoquímica
  • Desechos nucleares
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
DEF

Elemento metálico radiactivo, número atómico 90.

CONT

[...] el interés principal del torio [...] resulta de su calidad de materia fértil: expuesto al flujo de neutrones rápidos en el seno de un reactor autorregenerador, el torio 232 absorbe un neutrón y se convierte en torio 233, el cual, mediante emisión de una partícula beta se convierte en proactinio 233 que, por pérdida de otra partícula beta, da uranio 233, isótopo éste que es físil y puede servir como combustible nuclear en otro reactor.

Save record 2

Record 3 2003-12-01

English

Subject field(s)
  • Atomic Physics
DEF

Of a material: containing one or more fertile nuclides. [Definition standardized by ISO].

OBS

fertile material : In nuclear technology, any substance which is not capable of sustaining a chain reaction but which can be converted into a fissionable material in a nuclear reactor. Uranium 238(which can be converted to plutonium 239) and thorium 232(which can be converted to uranium 233) are fertile materials.

OBS

fertile: term standardized by ISO.

French

Domaine(s)
  • Physique atomique
DEF

Qualifie une matière contenant un ou plusieurs nucléides fertiles. [Définition normalisée par l'ISO.]

OBS

fertile : terme normalisé par l'ISO.

Spanish

Campo(s) temático(s)
  • Física atómica
DEF

En atomística, [dícese de un] material no fisionable por sí mismo, pero que en un reactor puede ser transformado en un material fisionable, por un proceso nuclear.

Save record 3

Record 4 - external organization data 2000-08-30

English

Subject field(s)
  • Chemistry
  • Atomic Physics
  • Compartment - Canadian Nuclear Safety Commission
DEF

... thorium containing not more than 10-7 kg of uranium 233 per kilogram of thorium 232.

OBS

"Unirradiated thorium" has the meaning assigned to that term by paragraph 148 of the IAEA Regulations. [Packaging and Transport of Nuclear Substances Regulations]

French

Domaine(s)
  • Chimie
  • Physique atomique
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

[...] thorium ne contenant pas plus de 10-7 kg d'uranium 233 par kilogramme de thorium 232.

OBS

thorium non irradié : S'entend au sens du paragraphe 148 du Règlement de l'AIEA. [Règlement sur l'emballage et le transport des substances nucléaires]

Spanish

Save record 4

Record 5 - external organization data 1997-12-18

English

Subject field(s)
  • Chemistry
  • Compartment - Canadian Nuclear Safety Commission
DEF

... thorium consisting of thorium 232 with trace quantities of thorium 228.

French

Domaine(s)
  • Chimie
  • Tiroir - Commission canadienne de sûreté nucléaire
DEF

[...] thorium 232 présentant des traces de thorium 228.

Spanish

Save record 5

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