TERMIUM Plus®
The Government of Canada’s terminology and linguistic data bank.
VOID REACTIVITY [10 records]
Record 1 - internal organization data 2017-04-13
Record 1, English
Record 1, Subject field(s)
- Nuclear Physics
Record 1, Main entry term, English
- positive void coefficient of reactivity
1, record 1, English, positive%20void%20coefficient%20of%20reactivity
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
The reactor involved in the Chernobyl nuclear accident was a 1,000-MWe (3,200-MWt) RBMK, a boiling-water pressure-tube, graphite moderated power reactor that was developed and operated in the former Soviet Union. Because of the pressure-tube design using water as coolant within channels in the graphite moderator, RBMK reactors have a significant positive void coefficient of reactivity in which a reduction in the coolant density results in an increase in the system reactivity due to a reduction in neutron absorption by the coolant. 1, record 1, English, - positive%20void%20coefficient%20of%20reactivity
Record 1, French
Record 1, Domaine(s)
- Physique nucléaire
Record 1, Main entry term, French
- coefficient de vide positif
1, record 1, French, coefficient%20de%20vide%20positif
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
En partie basse de certains canaux de combustible, l'enthalpie du combustible a atteint les niveaux critiques pour la dispersion du combustible [...] Ce phénomène a été aggravé par l'apparition d'un coefficient de vide positif, la vapeur d'eau formée contribuant à propager l'augmentation de la densité de puissance à l'ensemble du cœur. 1, record 1, French, - coefficient%20de%20vide%20positif
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2015-01-19
Record 2, English
Record 2, Subject field(s)
- Atomic Physics
Record 2, Main entry term, English
- void coefficient
1, record 2, English, void%20coefficient
correct, standardized
Record 2, Abbreviations, English
Record 2, Synonyms, English
- void coefficient of reactivity 2, record 2, English, void%20coefficient%20of%20reactivity
correct, see observation
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
The partial derivative of reactivity with respect to the volume fraction of voids in a specified location. 1, record 2, English, - void%20coefficient
Record number: 2, Textual support number: 1 OBS
void coefficient: term and definition standardized by ISO in 1997. 3, record 2, English, - void%20coefficient
Record number: 2, Textual support number: 2 OBS
void coefficient of reactivity: term standardized by ISO in the 921 standard published in 1972 but not included in the 1997 version. 3, record 2, English, - void%20coefficient
Record 2, French
Record 2, Domaine(s)
- Physique atomique
Record 2, Main entry term, French
- coefficient de vide
1, record 2, French, coefficient%20de%20vide
correct, masculine noun, standardized
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Dérivée partielle de la réactivité par rapport à la fraction du volume des vides en un endroit déterminé. 2, record 2, French, - coefficient%20de%20vide
Record number: 2, Textual support number: 1 OBS
coefficient de vide : termes et définition normalisés par l'ISO en 1997. 3, record 2, French, - coefficient%20de%20vide
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2011-12-22
Record 3, English
Record 3, Subject field(s)
- Mathematics
- Nuclear Fission Reactors
Record 3, Main entry term, English
- negative void coefficient of reactivity
1, record 3, English, negative%20void%20coefficient%20of%20reactivity
correct
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 OBS
A negative void coefficient means that the reactivity decreases as the void content inside [a nuclear] reactor increases - but it also means that the reactivity increases if the void content inside the reactor is reduced. 2, record 3, English, - negative%20void%20coefficient%20of%20reactivity
Record 3, French
Record 3, Domaine(s)
- Mathématiques
- Réacteurs nucléaires de fission
Record 3, Main entry term, French
- coefficient de vide négatif
1, record 3, French, coefficient%20de%20vide%20n%C3%A9gatif
correct, masculine noun
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 CONT
[Réacteurs à eau lourde bouillante.] Le coefficient de vide négatif (– 100 p.c.m. [parties pour cent mille] / % de vide autour des valeurs nominales de la puissance et du débit de recirculation) doit être considéré à pression constante. 1, record 3, French, - coefficient%20de%20vide%20n%C3%A9gatif
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2011-09-19
Record 4, English
Record 4, Subject field(s)
- Nuclear Fission Reactors
Record 4, Main entry term, English
- low void reactivity fuel
1, record 4, English, low%20void%20reactivity%20fuel
correct
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 CONT
Low Void Reactivity Fuel (LVRF) involves the implementation of fuel design changes to reduce the positive coolant void reactivity, and as such alleviates the root cause of the problem and therefore enhances the robustness of the Loss of Coolant Accident (LOCA) safety case. 1, record 4, English, - low%20void%20reactivity%20fuel
Record 4, Key term(s)
- low-void reactivity fuel
Record 4, French
Record 4, Domaine(s)
- Réacteurs nucléaires de fission
Record 4, Main entry term, French
- combustible à faible réactivité cavitaire
1, record 4, French, combustible%20%C3%A0%20faible%20r%C3%A9activit%C3%A9%20cavitaire
correct, masculine noun
Record 4, Abbreviations, French
Record 4, Synonyms, French
- combustible à faible coefficient de vide 2, record 4, French, %20combustible%20%C3%A0%20faible%20coefficient%20de%20vide
correct, masculine noun
Record 4, Textual support, French
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - external organization data 2007-11-08
Record 5, English
Record 5, Subject field(s)
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 5, Main entry term, English
- positive void reactivity feedback 1, record 5, English, positive%20void%20reactivity%20feedback
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 CONT
Positive void reactivity feedback of CANDU reactors causes a fission power pulse after a Large-Break Loss of Coolant Accident (LBLOCA). 1, record 5, English, - positive%20void%20reactivity%20feedback
Record 5, French
Record 5, Domaine(s)
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 5, Main entry term, French
- contre-réaction de réactivité du vide positive
1, record 5, French, contre%2Dr%C3%A9action%20de%20r%C3%A9activit%C3%A9%20du%20vide%20positive
feminine noun
Record 5, Abbreviations, French
Record 5, Synonyms, French
Record 5, Textual support, French
Record number: 5, Textual support number: 1 CONT
La contre-réaction de réactivité du vide positive dans les réacteurs CANDU entraîne une pointe de puissance de fission après un APRP [accident de perte de réfrigérant primaire] dû à une grosse brèche. 1, record 5, French, - contre%2Dr%C3%A9action%20de%20r%C3%A9activit%C3%A9%20du%20vide%20positive
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - external organization data 2007-11-08
Record 6, English
Record 6, Subject field(s)
- Titles of Documents and Works
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 6, Main entry term, English
- Investigation into the Role of Pipe Breaks in the Licensing of CANDU Reactors with Positive Void Reactivity Feedback and the Credible Application of Early Detection(Leak-before-Break). 1, record 6, English, Investigation%20into%20the%20Role%20of%20Pipe%20Breaks%20in%20the%20Licensing%20of%20CANDU%20Reactors%20with%20Positive%20Void%20Reactivity%20Feedback%20and%20the%20Credible%20Application%20of%20Early%20Detection%28Leak%2Dbefore%2DBreak%29%2E
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 OBS
RSP-0217 - This report investigates the frequency of leaking of the reactor cooling systems (RCS). 1, record 6, English, - Investigation%20into%20the%20Role%20of%20Pipe%20Breaks%20in%20the%20Licensing%20of%20CANDU%20Reactors%20with%20Positive%20Void%20Reactivity%20Feedback%20and%20the%20Credible%20Application%20of%20Early%20Detection%28Leak%2Dbefore%2DBreak%29%2E
Record 6, French
Record 6, Domaine(s)
- Titres de documents et d'œuvres
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 6, Main entry term, French
- Enquête sur le rôle des ruptures de conduites dans l'autorisation des réacteurs CANDU avec contre réaction de réactivité du vide positive et application fondée de la détection précoce (fuite avant rupture) 1, record 6, French, Enqu%C3%AAte%20sur%20le%20r%C3%B4le%20des%20ruptures%20de%20conduites%20dans%20l%27autorisation%20des%20r%C3%A9acteurs%20CANDU%20avec%20contre%20r%C3%A9action%20de%20r%C3%A9activit%C3%A9%20du%20vide%20positive%20et%20application%20fond%C3%A9e%20de%20la%20d%C3%A9tection%20pr%C3%A9coce%20%28fuite%20avant%20rupture%29
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 OBS
RSP-0217 - Ce rapport porte sur la fréquence des fuites dans les circuits de refroidissement du réacteur (CRR). 1, record 6, French, - Enqu%C3%AAte%20sur%20le%20r%C3%B4le%20des%20ruptures%20de%20conduites%20dans%20l%27autorisation%20des%20r%C3%A9acteurs%20CANDU%20avec%20contre%20r%C3%A9action%20de%20r%C3%A9activit%C3%A9%20du%20vide%20positive%20et%20application%20fond%C3%A9e%20de%20la%20d%C3%A9tection%20pr%C3%A9coce%20%28fuite%20avant%20rupture%29
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - external organization data 2005-11-10
Record 7, English
Record 7, Subject field(s)
- Atomic Physics
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 7, Main entry term, English
- void coefficient of reactivity 1, record 7, English, void%20coefficient%20of%20reactivity
Record 7, Abbreviations, English
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
The void coefficient of reactivity is the reactivity change in the core if the heat transport system voids. In a CANDU reactor this reactivity insertion is positive. 1, record 7, English, - void%20coefficient%20of%20reactivity
Record 7, French
Record 7, Domaine(s)
- Physique atomique
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 7, Main entry term, French
- coefficient de réactivité cavitaire
1, record 7, French, coefficient%20de%20r%C3%A9activit%C3%A9%20cavitaire
masculine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 CONT
Le coefficient de réactivité cavitaire est le changement de réactivité qui survient dans le coeur si le circuit caloporteur expulse le caloporteur. Dans un réacteur CANDU, cette insertion de réactivité est positive. 1, record 7, French, - coefficient%20de%20r%C3%A9activit%C3%A9%20cavitaire
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - external organization data 2005-10-25
Record 8, English
Record 8, Subject field(s)
- Atomic Physics
- Compartment - Canadian Nuclear Safety Commission
Record 8, Main entry term, English
- void reactivity error allowance
1, record 8, English, void%20reactivity%20error%20allowance
correct
Record 8, Abbreviations, English
Record 8, Synonyms, English
Record 8, Textual support, English
Record number: 8, Textual support number: 1 CONT
The NESTLE code, developed by Professor P.J. Turinsky's group under a contract with DOE, has been recently used to perform CANDU core calculations to assess the void reactivity error allowance under a number of CNSC [Canadian Nuclear Safety Commission] research projects. 2, record 8, English, - void%20reactivity%20error%20allowance
Record 8, French
Record 8, Domaine(s)
- Physique atomique
- Tiroir - Commission canadienne de sûreté nucléaire
Record 8, Main entry term, French
- écart admissible - réactivité selon le volume des vides
1, record 8, French, %C3%A9cart%20admissible%20%2D%20r%C3%A9activit%C3%A9%20selon%20le%20volume%20des%20vides
masculine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
- tolérance d'écart de la réactivité du vide 2, record 8, French, tol%C3%A9rance%20d%27%C3%A9cart%20de%20la%20r%C3%A9activit%C3%A9%20du%20vide
feminine noun
Record 8, Textual support, French
Record number: 8, Textual support number: 1 CONT
Le code NESTLE, élaboré par le groupe du professeur P.J. Turinsky, dans le cadre d'un contrat avec le DOE, a récemment servi à la réalisation de calculs sur la tolérance d'écart de la réactivité du vide dans le cadre d'un certain nombre de projets de recherche de la CCSN, [Commission canadienne de sûreté nucléaire]. 2, record 8, French, - %C3%A9cart%20admissible%20%2D%20r%C3%A9activit%C3%A9%20selon%20le%20volume%20des%20vides
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - external organization data 2005-08-25
Record 9, English
Record 9, Subject field(s)
- Atomic Physics
- Compartment - Canadian Nuclear Safety Commission
Record 9, Main entry term, English
- void reactivity 1, record 9, English, void%20reactivity
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 CONT
The void reactivity is the change in reactivity for 100% voiding of all coolant channels. 1, record 9, English, - void%20reactivity
Record 9, French
Record 9, Domaine(s)
- Physique atomique
- Tiroir - Commission canadienne de sûreté nucléaire
Record 9, Main entry term, French
- réactivité cavitaire
1, record 9, French, r%C3%A9activit%C3%A9%20cavitaire
feminine noun
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 CONT
La réactivité cavitaire est le changement de réactivité lors d'une expulsion du caloporteur de 100 % hors de tous les canaux de caloporteur. 1, record 9, French, - r%C3%A9activit%C3%A9%20cavitaire
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 1996-11-08
Record 10, English
Record 10, Subject field(s)
- Titles of Monographs
Record 10, Main entry term, English
- The Influence of Lattice Structure and Composition on the Coolent Void Reactivity in CANDU
1, record 10, English, The%20Influence%20of%20Lattice%20Structure%20and%20Composition%20on%20the%20Coolent%20Void%20Reactivity%20in%20CANDU
Canada
Record 10, Abbreviations, English
Record 10, Synonyms, English
Record 10, Textual support, English
Record number: 10, Textual support number: 1 OBS
Paper presented by the Atomic Energy Control Board at the 11th Annual Conference of the Canadian Nuclear Society, Toronto, June 1990. 1, record 10, English, - The%20Influence%20of%20Lattice%20Structure%20and%20Composition%20on%20the%20Coolent%20Void%20Reactivity%20in%20CANDU
Record 10, French
Record 10, Domaine(s)
- Titres de monographies
Record 10, Main entry term, French
- The Influence of Lattice Structure and Composition on the Coolent Void Reactivity in CANDU
1, record 10, French, The%20Influence%20of%20Lattice%20Structure%20and%20Composition%20on%20the%20Coolent%20Void%20Reactivity%20in%20CANDU
Canada
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 OBS
Mémoire présenté par la Commission de contrôle de l'énergie atomique à la 11e Conférence annuelle de la Société nucléaire canadienne, Toronto (Ontario), juin 1990. 1, record 10, French, - The%20Influence%20of%20Lattice%20Structure%20and%20Composition%20on%20the%20Coolent%20Void%20Reactivity%20in%20CANDU
Record 10, Spanish
Record 10, Textual support, Spanish
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2025
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
Language Portal of Canada
Access a collection of Canadian resources on all aspects of English and French, including quizzes.
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: