TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
COMBUSTIBLE DIOXYDE URANIUM [9 records]
Record 1 - internal organization data 2025-04-15
Record 1, English
Record 1, Subject field(s)
- Combustion and Fuels (Fireplaces)
- Nuclear Fission Reactors
Record 1, Main entry term, English
- fuel bundle
1, record 1, English, fuel%20bundle
correct, noun
Record 1, Abbreviations, English
Record 1, Synonyms, English
- bundle 2, record 1, English, bundle
correct, noun
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
A CANDU fuel assembly consists of a bundle of 37 half metre long fuel rods (ceramic fuel pellets in zircaloy tubes) plus a support structure, with 12 bundles lying end to end in a fuel channel. Control rods penetrate the calandria vertically, and a secondary shutdown system involves adding gadolinium to the moderator. 3, record 1, English, - fuel%20bundle
Record 1, French
Record 1, Domaine(s)
- Combustion et combustibles (Foyers)
- Réacteurs nucléaires de fission
Record 1, Main entry term, French
- grappe de combustible
1, record 1, French, grappe%20de%20combustible
correct, see observation, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- grappe 1, record 1, French, grappe
correct, see observation, feminine noun
- faisceau de combustible 2, record 1, French, faisceau%20de%20combustible
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Dans l'assemblage combustible d’un réacteur CANDU, les pastilles de combustible constituées de dioxyde d’uranium(UO2) sont retenues dans une grappe. [Dans chaque] canal de combustible de la calandre se trouve un tube de force qui contient 12 grappes de combustible. 3, record 1, French, - grappe%20de%20combustible
Record number: 1, Textual support number: 1 OBS
grappe de combustible; grappe : désignations utilisées à la Commission canadienne de sûreté nucléaire. 4, record 1, French, - grappe%20de%20combustible
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2010-11-26
Record 2, English
Record 2, Subject field(s)
- Nuclear Fission Reactors
- Nuclear Power Stations
Record 2, Main entry term, English
- fuel matrix
1, record 2, English, fuel%20matrix
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
[Nuclear reactors and fuels.] Fabrication of non-oxide matrix fuels. Advanced metal-clad fuels in which the fuel matrix is composed of actinide carbides, nitrides, and metals are being developed. Fabrication of carbides and nitrides is similar to that for oxide fuels with the exception that these fuels are very sensitive to the presence of oxygen and humidity and so they must be fabricated under carefully controlled inert atmospheres. 1, record 2, English, - fuel%20matrix
Record 2, French
Record 2, Domaine(s)
- Réacteurs nucléaires de fission
- Centrales nucléaires
Record 2, Main entry term, French
- matrice combustible
1, record 2, French, matrice%20combustible
correct, feminine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- matrice de combustible 2, record 2, French, matrice%20de%20combustible
correct, feminine noun
Record 2, Textual support, French
Record number: 2, Textual support number: 1 CONT
[Les critères de rechargement d’un assemblage non étanche] résultent des connaissances acquises sur le comportement du combustible dans les réacteurs de puissance en situation normale et dans les boucles expérimentales du CEA [Commissariat à l’énergie atomique] d’étude en situation accidentelle. Ils sont validés par plus de 10 ans d’expérience qui montrent que dans ces conditions les assemblages ne relâchent pas de matière fissile de manière significative dans le circuit primaire (la matrice combustible en céramique frittée est conçue pour retenir les produits de fission et résister à une attaque chimique de l’eau). 2, record 2, French, - matrice%20combustible
Record number: 2, Textual support number: 2 CONT
Étudier par la thermodynamique les transformations d’un combustible nucléaire n’ a de sens que si l'on considère à la fois les éléments constitutifs de ce combustible(ou matrice combustible, par exemple uranium et oxygène pour le combustible à base de dioxyde d’uranium utilisé dans les réacteurs à eau sous pression [REP]) et les produits de fission créés par irradiation. 3, record 2, French, - matrice%20combustible
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2009-10-06
Record 3, English
Record 3, Subject field(s)
- Atomic Physics
Record 3, Main entry term, English
- neutron efficiency
1, record 3, English, neutron%20efficiency
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 CONT
HWR's can operate on natural uranium, enriched uranium or plutonium, and have an neutron efficiency of 0.9, whereas LWR have an efficient of 0.4. Note anything over one produces more fuel than is consumed by converting U238 to P239 which is fissible. 1, record 3, English, - neutron%20efficiency
Record 3, French
Record 3, Domaine(s)
- Physique atomique
Record 3, Main entry term, French
- efficacité neutronique
1, record 3, French, efficacit%C3%A9%20neutronique
correct, feminine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
Pour un réacteur à l'uranium naturel qui utilise du dioxyde d’uranium, seule l'eau lourde constitue un modérateur adéquat. Le choix des volumes relatifs de combustible et de modérateur ainsi que leur configuration géométrique déterminent l'efficacité neutronique. 2, record 3, French, - efficacit%C3%A9%20neutronique
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - external organization data 2007-11-13
Record 4, English
Record 4, Subject field(s)
- Chemistry
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 4, Main entry term, English
- uranium dioxide pellet 1, record 4, English, uranium%20dioxide%20pellet
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
GE Canada proposes to manufacture LEU [low enriched uranium] fuel bundles of enrichment of less than 5% U-235 by weight, using uranium dioxide pellets manufactured in North Carolina. 1, record 4, English, - uranium%20dioxide%20pellet
Record 4, French
Record 4, Domaine(s)
- Chimie
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 4, Main entry term, French
- pastille de dioxyde d’uranium
1, record 4, French, pastille%20de%20dioxyde%20d%26rsquo%3Buranium
feminine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
GE Canada a proposé de fabriquer des grappes de combustible d’uranium faiblement enrichi(UFE), dont la proportion d’uranium 235 est inférieure à 5 % en poids, à partir de pastilles de dioxyde d’uranium fabriquées en Caroline du Nord. 1, record 4, French, - pastille%20de%20dioxyde%20d%26rsquo%3Buranium
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - external organization data 2006-03-24
Record 5, English
Record 5, Subject field(s)
- Atomic Physics
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 5, Main entry term, English
- uranium dioxide fuel 1, record 5, English, uranium%20dioxide%20fuel
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, French
Record 5, Domaine(s)
- Physique atomique
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 5, Main entry term, French
- combustible de dioxyde d'uranium
1, record 5, French, combustible%20de%20dioxyde%20d%27uranium
masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - external organization data 2006-01-25
Record 6, English
Record 6, Subject field(s)
- Combustion and Fuels (Fireplaces)
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 6, Main entry term, English
- fuel handling 1, record 6, English, fuel%20handling
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
Fuel Handling. ... New Fuel Handling. The ceramic UO2 is brittle and may chip if fuel bundles receive rough handling. These chips or the sharp edges they leave may puncture the sheath. 1, record 6, English, - fuel%20handling
Record 6, French
Record 6, Domaine(s)
- Combustion et combustibles (Foyers)
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 6, Main entry term, French
- manutention du combustible
1, record 6, French, manutention%20du%20combustible
feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
Manutention du combustible. [...] Manipulation du combustible frais. La céramique de dioxyde d’uranium est cassante et peut s’écailler si l'on manipule brutalement les grappes. Les éclats ou les bords écaillés sont pointus et peuvent transpercer la gaine. 1, record 6, French, - manutention%20du%20combustible
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - external organization data 2005-12-20
Record 7, English
Record 7, Subject field(s)
- Properties of Fuels
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 7, Main entry term, English
- natural uranium dioxide fuel 1, record 7, English, natural%20uranium%20dioxide%20fuel
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
A CANDU reactor uses natural uranium dioxide fuel with heavy water moderator and heavy water coolant. 1, record 7, English, - natural%20uranium%20dioxide%20fuel
Record 7, French
Record 7, Domaine(s)
- Propriétés des combustibles
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 7, Main entry term, French
- combustible à base de dioxyde d’uranium naturel
1, record 7, French, combustible%20%C3%A0%20base%20de%20dioxyde%20d%26rsquo%3Buranium%20naturel
masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
- combustible de dioxyde d’uranium naturel 1, record 7, French, combustible%20de%20dioxyde%20%20d%26rsquo%3Buranium%20%20naturel
masculine noun
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Le réacteur CANDU utilise un combustible à base de dioxyde d’uranium naturel ainsi qu'un modérateur(eau lourde) et un caloporteur(également de l'eau lourde). Le coeur d’un réacteur CANDU contient le combustible de dioxyde d’uranium naturel, et de l'eau lourde utilisé comme caloporteur et comme modérateur. 1, record 7, French, - combustible%20%C3%A0%20base%20de%20dioxyde%20d%26rsquo%3Buranium%20naturel
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - external organization data 2005-08-19
Record 8, English
Record 8, Subject field(s)
- Properties of Fuels
- Atomic Physics
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 8, Main entry term, English
- CANLUB fuel 1, record 8, English, CANLUB%20fuel
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, Textual support, English
Record number: 8, Textual support number: 1 CONT
[This figure] shows the design chosen for a CANDU fuel bundle. This bundle, used in all routine fuelling of CANDU reactors, is called CANLUB fuel. ... The bundle ... is mostly uranium dioxide (UO2), sheathed and held together by zircaloy. Zircaloy 4, the specific alloy used for this purpose, is 98% zirconium and 1.7% tin. The UO2 is in the form of high-density pellets. Each fuel element is a thin zircaloy tube, the fuel sheath, filled with fuel pellets. A thin lubricating layer of graphite between the pellet and the sheath is what gives the fuel the proprietary name CANLUB. 1, record 8, English, - CANLUB%20fuel
Record 8, French
Record 8, Domaine(s)
- Propriétés des combustibles
- Physique atomique
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 8, Main entry term, French
- combustible CANLUB
1, record 8, French, combustible%20CANLUB
masculine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
On peut voir [...] la grappe de combustible conçue pour l'alimentation ordinaire des réacteurs CANDU : le combustible CANLUB. [...] La grappe [...] est principalement composée de dioxyde d’uranium(UO2) confiné dans une gaine de zircaloy. Le zircaloy 4, l'alliage utilisé dans le combustible CANLUB, est composé de 98 % de zirconium et de 1, 7 % d’étain. Le UO2 se présente sous la forme de pastilles très denses. Chaque crayon de combustible est formé d’un tube mince de zircaloy-la gaine de combustible-rempli de pastilles de combustible. Le nom de marque du combustible, CANLUB, provient de la mince couche lubrifiante de graphite entre la pastille et la gaine. 1, record 8, French, - combustible%20CANLUB
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - external organization data 2005-08-19
Record 9, English
Record 9, Subject field(s)
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 9, Main entry term, English
- fission product containment 1, record 9, English, fission%20product%20containment
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 CONT
Fission Product Containment. Uranium dioxide holds 95% of the fission products within its structure. Most of the fission products released come from the hot inner part of the pellet. These migrate to cracks in the cooler part of the pellet and escape into the spaces between the pellets. Some of this free inventory escapes if the fuel element ruptures. 1, record 9, English, - fission%20product%20containment
Record 9, French
Record 9, Domaine(s)
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 9, Main entry term, French
- confinement des produits de fission
1, record 9, French, confinement%20des%20produits%20de%20fission
masculine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 CONT
Confinement des produits de fission. Le dioxyde d’uranium conserve dans sa structure 95 % des produits de fission. La plupart des produits de fission libérés proviennent de la région chaude au coeur de la pastille. Ils se diffusent par les fissures dans la partie plus froide des pastilles et s’échappent dans les cavités entre les pastilles. Une partie des substances libres s’échappera si le crayon de combustible se brise. 1, record 9, French, - confinement%20des%20produits%20de%20fission
Record 9, Spanish
Record 9, Textual support, Spanish
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