TERMIUM Plus®
From: Translation Bureau
On social media
Consult the Government of Canada’s terminology data bank.
NUCLEAR REACTOR VESSEL [10 records]
Record 1 - internal organization data 2024-07-25
Record 1, English
Record 1, Subject field(s)
- Types of Ships and Boats
- Nuclear Science and Technology
Record 1, Main entry term, English
- nuclear-powered vessel
1, record 1, English, nuclear%2Dpowered%20vessel
correct
Record 1, Abbreviations, English
- NPV 2, record 1, English, NPV
correct
Record 1, Synonyms, English
- nuclear vessel 3, record 1, English, nuclear%20vessel
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
A nuclear-powered vessel(NPV) is a ship or submarine that is powered by a nuclear reactor. This allows NPVs to operate at sea for much longer periods than conventionally powered vessels. 2, record 1, English, - nuclear%2Dpowered%20vessel
Record number: 1, Textual support number: 2 CONT
Initially, the major powers continued to build diesel-electric submarines alongside nuclear vessels, but some later gave in to the expense of maintaining two categories of submarine in parallel. 4, record 1, English, - nuclear%2Dpowered%20vessel
Record 1, Key term(s)
- nuclear powered vessel
Record 1, French
Record 1, Domaine(s)
- Types de bateaux
- Sciences et techniques nucléaires
Record 1, Main entry term, French
- navire à propulsion nucléaire
1, record 1, French, navire%20%C3%A0%20propulsion%20nucl%C3%A9aire
correct, masculine noun
Record 1, Abbreviations, French
- NPN 2, record 1, French, NPN
correct, masculine noun
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Dans le cas des incidents impliquant des navires à propulsion nucléaire (NPN) appartenant aux forces armées étrangères et se trouvant dans les ports canadiens, le ministère de la Défense nationale et les Forces canadiennes (MDN/FC) agira en tant qu'autorité canadienne responsable sur le site. 2, record 1, French, - navire%20%C3%A0%20propulsion%20nucl%C3%A9aire
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2021-02-22
Record 2, English
Record 2, Subject field(s)
- Thermonuclear fusion
- Nuclear Fission Reactors
Record 2, Main entry term, English
- divertor
1, record 2, English, divertor
correct
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 CONT
In nuclear fusion power research, a divertor is a device within a tokamak or a stellarator that allows the online removal of waste material from the plasma while the reactor is still operating. This allows control over the buildup of fusion products in the fuel, and removes impurities in the plasma that have entered into it from the vessel lining. 2, record 2, English, - divertor
Record 2, French
Record 2, Domaine(s)
- Fusion thermonucléaire
- Réacteurs nucléaires de fission
Record 2, Main entry term, French
- diverteur
1, record 2, French, diverteur
correct, masculine noun
Record 2, Abbreviations, French
Record 2, Synonyms, French
- écorceur 2, record 2, French, %C3%A9corceur
see observation, masculine noun, obsolete
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Dispositif d'un réacteur à fusion qui permet de modifier les lignes de champ au bord du plasma afin d'en extraire les impuretés et les cendres. 3, record 2, French, - diverteur
Record number: 2, Textual support number: 1 OBS
diverteur : désignation et définition publiées au Journal officiel de la République française le 2 septembre 2020. 4, record 2, French, - diverteur
Record number: 2, Textual support number: 2 OBS
écorceur : désignation qui est tombée en désuétude. 2, record 2, French, - diverteur
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Fusión termonuclear
- Reactores nucleares de fisión
Record 2, Main entry term, Spanish
- Divertor
1, record 2, Spanish, Divertor
masculine noun
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2017-04-20
Record 3, English
Record 3, Subject field(s)
- Nuclear Fission Reactors
- Nuclear Power Stations
Record 3, Main entry term, English
- reactor vessel
1, record 3, English, reactor%20vessel
correct, standardized
Record 3, Abbreviations, English
Record 3, Synonyms, English
- core pressure vessel 2, record 3, English, core%20pressure%20vessel
- reactor pressure vessel 3, record 3, English, reactor%20pressure%20vessel
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
The container of a reactor in which the fuel, moderator (if any), and control rods are situated and through which the coolant passes. 4, record 3, English, - reactor%20vessel
Record number: 3, Textual support number: 1 OBS
The container of the nuclear core or critical assembly may be a steel pressure vessel, a prestressed concrete reactor vessel(PCRV) or a low pressure-vessel(such as calandria or sodium pot), etc. 4, record 3, English, - reactor%20vessel
Record number: 3, Textual support number: 2 OBS
reactor vessel: term standardized by ISO. 3, record 3, English, - reactor%20vessel
Record 3, French
Record 3, Domaine(s)
- Réacteurs nucléaires de fission
- Centrales nucléaires
Record 3, Main entry term, French
- caisson de réacteur
1, record 3, French, caisson%20de%20r%C3%A9acteur
correct, see observation, masculine noun, standardized
Record 3, Abbreviations, French
Record 3, Synonyms, French
- cuve de réacteur 1, record 3, French, cuve%20de%20r%C3%A9acteur
correct, see observation, feminine noun, standardized
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Récipient principal entourant le cœur du réacteur avec son réfrigérant. 2, record 3, French, - caisson%20de%20r%C3%A9acteur
Record number: 3, Textual support number: 1 OBS
Le terme caisson est utilisé principalement lorsqu'il s'agit d'un ouvrage en béton [...] Dans le cas d'enceintes métalliques on parle de «cuve» du réacteur. 3, record 3, French, - caisson%20de%20r%C3%A9acteur
Record number: 3, Textual support number: 2 OBS
caisson de réacteur; cuve de réacteur : termes normalisés par l'ISO. 2, record 3, French, - caisson%20de%20r%C3%A9acteur
Record 3, Spanish
Record 3, Campo(s) temático(s)
- Reactores nucleares de fisión
- Centrales nucleares
Record 3, Main entry term, Spanish
- vasija
1, record 3, Spanish, vasija
correct, feminine noun
Record 3, Abbreviations, Spanish
Record 3, Synonyms, Spanish
- cuba del reactor 2, record 3, Spanish, cuba%20del%20reactor
correct, feminine noun
- vasija del reactor 2, record 3, Spanish, vasija%20del%20reactor
correct, feminine noun
- recipiente del reactor 3, record 3, Spanish, recipiente%20del%20reactor
masculine noun
Record 3, Textual support, Spanish
Record number: 3, Textual support number: 1 DEF
Recipiente que contiene el núcleo de un reactor nuclear, con las vainas de combustible, el reflector, el agua radiactiva, parte del refrigerante y otros componentes. 1, record 3, Spanish, - vasija
Record 4 - internal organization data 2017-04-13
Record 4, English
Record 4, Subject field(s)
- Nuclear Fission Reactors
Record 4, Main entry term, English
- primary coolant pipe
1, record 4, English, primary%20coolant%20pipe
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
A safety device against overpressure failure of a nuclear reactor pressure vessel... The safety device... wherein the coolant conducting surface is a primary coolant pipe having a wall, and said pressure relief valve is set into the wall near the pressure vessel. 2, record 4, English, - primary%20coolant%20pipe
Record 4, French
Record 4, Domaine(s)
- Réacteurs nucléaires de fission
Record 4, Main entry term, French
- tuyauterie primaire
1, record 4, French, tuyauterie%20primaire
correct, feminine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
Record 4, Textual support, French
Record number: 4, Textual support number: 1 CONT
Pour les tuyauteries primaires, la possibilité de réaliser par forgeage et cintrage des branches monobloc avec coudes et piquages intégrés a été explorée et qualifiée. 2, record 4, French, - tuyauterie%20primaire
Record number: 4, Textual support number: 1 OBS
[...] les tuyauteries primaires ne sont pas considérées comme faisant partie du cœur des réacteurs [...] 3, record 4, French, - tuyauterie%20primaire
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2016-11-23
Record 5, English
Record 5, Subject field(s)
- Nuclear Fission Reactors
Record 5, Main entry term, English
- nuclear power demonstration reactor
1, record 5, English, nuclear%20power%20demonstration%20reactor
correct
Record 5, Abbreviations, English
- NPD 2, record 5, English, NPD
correct
Record 5, Synonyms, English
- NPD Reactor 3, record 5, English, NPD%20Reactor
correct
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
Nuclear Power Demonstration reactor. This was the prototype CANDU reactor, and the first power reactor in Canada. It was located upstream of AECL' s Chalk River laboratories, along the Ottawa River's south shore(i. e. in Ontario). The reactor had a maximum continuous output of 22 MWe gross(19. 5 MWe net)... The reactor was built as a joint AECL/Ontario Hydro/Canadian General Electric project, and was initially intended to use a vertically-fuelled pressure vessel reactor. The design was changed in 1957 to natural uranium fuel bundles in horizontal pressure tubes in unpressurized heavy water moderator, with on-line refuelling. These are hallmarks of the CANDU reactor. The reactor had 132 fuel channels(each fuel channel comprised a pressure tube inside a calandria tube) and the coolant leaving the channels was 7. 2 MPa and 277°C. The main reactivity control was by adjusting the heavy-water moderator level, which could be rapidly dumped for fast shut down. NPD was finally shut down on May 5 1987, for economic reasons... 4, record 5, English, - nuclear%20power%20demonstration%20reactor
Record 5, French
Record 5, Domaine(s)
- Réacteurs nucléaires de fission
Record 5, Main entry term, French
- réacteur NPD
1, record 5, French, r%C3%A9acteur%20NPD
correct, masculine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
- réacteur nucléaire de démonstration 2, record 5, French, r%C3%A9acteur%20nucl%C3%A9aire%20de%20d%C3%A9monstration
masculine noun
Record 5, Textual support, French
Record number: 5, Textual support number: 1 OBS
réacteur nucléaire de démonstration : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques. 3, record 5, French, - r%C3%A9acteur%20NPD
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2011-03-24
Record 6, English
Record 6, Subject field(s)
- Scientific Research Equipment
- Analytical Chemistry
- Atomic Physics
- Radiation Protection
Record 6, Main entry term, English
- detection chamber
1, record 6, English, detection%20chamber
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
A neutron flux measurement installation for liquid-cooled nuclear reactors comprising in combination a stationary neutron detection chamber beneath the reactor vessel containing the coolant liquid and the reactor core made up of vertically insertable fuel assemblies in juxtaposed relation, and a tubular enclosure containing an inert gas enclosure being vertically above the detection chamber and extending downwards from the reactor core to the immediate vicinity of the internal wall of reactor vessel, the tubular enclosure being removable and having within the reactor core an external shape corresponding to the shape of fuel assemblies and occupying a compartment defined by the adjacent fuel. 1, record 6, English, - detection%20chamber
Record 6, French
Record 6, Domaine(s)
- Matériel et équipement (Recherche scientifique)
- Chimie analytique
- Physique atomique
- Radioprotection
Record 6, Main entry term, French
- chambre de détection
1, record 6, French, chambre%20de%20d%C3%A9tection
correct, feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
Mesure bêta. Le principe de piégeage pour la mesure des aérosols bêta est similaire à celui utilisé pour la capture des aérosols émetteurs alpha. Néanmoins, les particules bêta ont un parcours dans l’air beaucoup plus important pouvant atteindre plusieurs mètres pour certains émetteurs. Les phénomènes d’absorption dans le filtre et dans l’air séparant le filtre du détecteur ne sont donc pas autant cruciaux que dans le cas de la détection des particules alpha. En revanche, la détection des particules bêta est très sensible au rayonnement gamma, car ce dernier peut déclencher au niveau de la chambre de détection les mêmes phénomènes électriques qu’une particule bêta. 2, record 6, French, - chambre%20de%20d%C3%A9tection
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 2010-11-29
Record 7, English
Record 7, Subject field(s)
- Nuclear Plant Safety
- Nuclear Fission Reactors
Record 7, Main entry term, English
- anti-ejection device
1, record 7, English, anti%2Dejection%20device
correct
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
Anti-ejection device for nuclear reactor control rod. The reactor comprises a tight enclosure integral with the nuclear reactor vessel, the control rod being integral with the command bar. 1, record 7, English, - anti%2Dejection%20device
Record 7, Key term(s)
- antiejection device
Record 7, French
Record 7, Domaine(s)
- Sûreté des centrales nucléaires
- Réacteurs nucléaires de fission
Record 7, Main entry term, French
- dispositif antiéjection
1, record 7, French, dispositif%20anti%C3%A9jection
correct, masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Des dispositions pour détecter rapidement une fuite ont été développées et des dispositifs antiéjection [de grappe de commande] ont été mis en place sur certaines tranches. 1, record 7, French, - dispositif%20anti%C3%A9jection
Record 7, Key term(s)
- dispositif anti-éjection
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 2010-11-26
Record 8, English
Record 8, Subject field(s)
- Nuclear Fission Reactors
- Nuclear Plant Safety
Record 8, Main entry term, English
- leak path
1, record 8, English, leak%20path
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, Textual support, English
Record number: 8, Textual support number: 1 CONT
Certain components of the nuclear reactor assembly, after years of service, may develop primary water stress corrosion cracking. If such cracking occurs in pressure boundary components, the potential to generate leak paths for the pressurized water coolant exists. Such leak paths could lead to a leakage of coolant water outside the pressure vessel and into the surrounding containment building, thereby creating a potential hazard. 1, record 8, English, - leak%20path
Record 8, French
Record 8, Domaine(s)
- Réacteurs nucléaires de fission
- Sûreté des centrales nucléaires
Record 8, Main entry term, French
- chemin de fuite
1, record 8, French, chemin%20de%20fuite
correct, masculine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
Le caractère unique des accidents graves tient à leur potentialité d’émission massive de produits radioactifs dans l’environnement et aux conséquences radiologiques associées [.] […] les produits de fission les plus volatifs sont relâchés dans la cuve [du réacteur], transportés et partiellement déposés dans le circuit primaire puis dans l’enceinte d’où ils peuvent atteindre l’extérieur par les chemins de fuite. 1, record 8, French, - chemin%20de%20fuite
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 2010-03-01
Record 9, English
Record 9, Subject field(s)
- Nuclear Power Stations
Record 9, Main entry term, English
- cartridge 1, record 9, English, cartridge
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 CONT
[Nuclear Gas Turbines] Fuel type... The fuel load is contained in a ’cartridge’ co(nuclear grade) vessel filled with fuel elements to be described further on. This cartridge is placed in a thick walled graphite vessel that is a fixed part of the reactor system; this vessel acts as a neutron reflector enabling the sustaining of the chain reaction. 1, record 9, English, - cartridge
Record 9, French
Record 9, Domaine(s)
- Centrales nucléaires
Record 9, Main entry term, French
- cartouche
1, record 9, French, cartouche
correct, feminine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 CONT
Cartouche d'éléments du combustible graphite. 1, record 9, French, - cartouche
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 2009-09-18
Record 10, English
Record 10, Subject field(s)
- Nuclear Fission Reactors
- Nuclear Plant Safety
Record 10, Main entry term, English
- in-core instrumentation room
1, record 10, English, in%2Dcore%20instrumentation%20room
correct
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, Textual support, English
Record number: 10, Textual support number: 1 CONT
In PWR [pressurized water nuclear reactor], neutron detectors are inserted inside the fuel assemblies by moving into thimble guide tubes that penetrate into the vessel bottom head from the in-core instrumentation room. 1, record 10, English, - in%2Dcore%20instrumentation%20room
Record 10, French
Record 10, Domaine(s)
- Réacteurs nucléaires de fission
- Sûreté des centrales nucléaires
Record 10, Main entry term, French
- salle d'instrumentation
1, record 10, French, salle%20d%27instrumentation
correct, feminine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 CONT
Instrumentation interne des réacteurs. [...] L'ensemble du système électromécanique de commande permet l'introduction, par la partie inférieure de la cuve, et la conduite, au moyen d'un système de sélection, de six détecteurs mobiles simultanément dans six des soixante doigts de gant installés. [...] Les éléments correspondants sont installés en permanence dans une salle appelée salle d'instrumentation, située au niveau inférieur du bâtiment réacteur près du puits de cuve. À l'intérieur d'une même chaîne, UC [unité de commande] et sélecteurs sont reliés entre eux par des tubes de liaison dans lesquels circule la sonde mobile. 1, record 10, French, - salle%20d%27instrumentation
Record 10, Spanish
Record 10, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
GCtranslate (available on the Government of Canada network only)
Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified:


