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PROMPT NEUTRONS [13 records]
Record 1 - internal organization data 2017-04-19
Record 1, English
Record 1, Subject field(s)
- Metrology and Units of Measure
- Nuclear Physics
Record 1, Main entry term, English
- dollar
1, record 1, English, dollar
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A unit of reactivity equal to that amount of reactivity required to make a reactor critical on prompt neutrons only, and therefore equal to the effective delayed neutron fraction for that reactor. 1, record 1, English, - dollar
Record 1, French
Record 1, Domaine(s)
- Unités de mesure et métrologie
- Physique nucléaire
Record 1, Main entry term, French
- dollar
1, record 1, French, dollar
correct, masculine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 DEF
Unité de réactivité, égale à la quantité de réactivité nécessaire pour rendre un réacteur critique à l'aide des neutrons instantanés seulement, et donc égale à la fraction efficace de neutrons retardés pour ce réacteur. 2, record 1, French, - dollar
Record number: 1, Textual support number: 1 OBS
La valeur du dollar varie sensiblement de 300 pcm (parties pour cent mille) pour un cœur au plutonium239 à650 pcm pour un cœur à l’uranium235. 3, record 1, French, - dollar
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2015-05-05
Record 2, English
Record 2, Subject field(s)
- Atomic Physics
Record 2, Main entry term, English
- prompt critical
1, record 2, English, prompt%20critical
correct, standardized
Record 2, Abbreviations, English
Record 2, Synonyms, English
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
Fulfilling the condition that a nuclear chain reacting medium is critical utilizing prompt neutrons only. 1, record 2, English, - prompt%20critical
Record number: 2, Textual support number: 1 OBS
prompt critical: term and defintion standardized by ISO. 2, record 2, English, - prompt%20critical
Record 2, French
Record 2, Domaine(s)
- Physique atomique
Record 2, Main entry term, French
- critique instantanée
1, record 2, French, critique%20instantan%C3%A9e
correct, feminine noun, standardized
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
[Qui remplit] les conditions requises pour qu'un milieu siège d'une réaction nucléaire en chaîne soit critique sous l'action des seuls neutrons instantanés. 1, record 2, French, - critique%20instantan%C3%A9e
Record number: 2, Textual support number: 1 OBS
critique instantanée : terme et définition normalisés par l'ISO. 2, record 2, French, - critique%20instantan%C3%A9e
Record 2, Spanish
Record 2, Textual support, Spanish
Record 3 - internal organization data 2015-04-29
Record 3, English
Record 3, Subject field(s)
- Nuclear Physics
Record 3, Main entry term, English
- prompt neutron fraction
1, record 3, English, prompt%20neutron%20fraction
correct, standardized
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
The ratio of the mean number of prompt neutrons per fission to the mean total number of neutrons(prompt plus delayed) per fission. 1, record 3, English, - prompt%20neutron%20fraction
Record number: 3, Textual support number: 1 OBS
prompt neutron fraction: term and definition standardized by ISO. 2, record 3, English, - prompt%20neutron%20fraction
Record 3, French
Record 3, Domaine(s)
- Physique nucléaire
Record 3, Main entry term, French
- fraction de neutrons instantanés
1, record 3, French, fraction%20de%20neutrons%20instantan%C3%A9s
correct, feminine noun, standardized
Record 3, Abbreviations, French
Record 3, Synonyms, French
Record 3, Textual support, French
Record number: 3, Textual support number: 1 DEF
Rapport du nombre moyen des neutrons instantanés au nombre moyen total des neutrons (instantanés plus retardés) émis par fission. 1, record 3, French, - fraction%20de%20neutrons%20instantan%C3%A9s
Record number: 3, Textual support number: 1 OBS
fraction de neutrons instantanés : terme et définition normalisés par l'ISO. 2, record 3, French, - fraction%20de%20neutrons%20instantan%C3%A9s
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - internal organization data 2015-04-24
Record 4, English
Record 4, Subject field(s)
- Atomic Physics
- Nuclear Fission Reactors
Record 4, Main entry term, English
- effective delayed neutron fraction
1, record 4, English, effective%20delayed%20neutron%20fraction
correct, standardized
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
The ratio of the mean number of fissions caused by delayed neutrons to the mean total number of fissions caused by delayed plus prompt neutrons. 1, record 4, English, - effective%20delayed%20neutron%20fraction
Record number: 4, Textual support number: 1 OBS
The effective delayed neutron fraction is generally larger than the actual delayed neutron fraction. 1, record 4, English, - effective%20delayed%20neutron%20fraction
Record number: 4, Textual support number: 2 OBS
effective delayed neutron fraction: term and definition standardized by ISO. 2, record 4, English, - effective%20delayed%20neutron%20fraction
Record 4, French
Record 4, Domaine(s)
- Physique atomique
- Réacteurs nucléaires de fission
Record 4, Main entry term, French
- fraction efficace de neutrons retardés
1, record 4, French, fraction%20efficace%20de%20neutrons%20retard%C3%A9s
correct, feminine noun, standardized
Record 4, Abbreviations, French
Record 4, Synonyms, French
- fraction efficace de neutrons différés 1, record 4, French, fraction%20efficace%20de%20neutrons%20diff%C3%A9r%C3%A9s
correct, feminine noun, standardized
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
Rapport du nombre moyen de fissions produites par les neutrons retardés au nombre moyen total des fissions produites par les neutrons retardés et les neutrons instantanés. 1, record 4, French, - fraction%20efficace%20de%20neutrons%20retard%C3%A9s
Record number: 4, Textual support number: 1 OBS
La fraction efficace de neutrons retardés est généralement plus grande que la fraction réelle de neutrons retardés. 1, record 4, French, - fraction%20efficace%20de%20neutrons%20retard%C3%A9s
Record number: 4, Textual support number: 2 OBS
fraction efficace de neutrons retardés; fraction efficace de neutrons différés : termes et définition normalisés par l'ISO. 2, record 4, French, - fraction%20efficace%20de%20neutrons%20retard%C3%A9s
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2014-06-10
Record 5, English
Record 5, Subject field(s)
- Atomic Physics
- Nuclear Power Stations
Record 5, Main entry term, English
- delayed neutron fraction
1, record 5, English, delayed%20neutron%20fraction
correct, standardized
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
The ratio of the mean number of delayed neutrons per fission to the mean total number of neutrons(prompt plus delayed) per fission. 1, record 5, English, - delayed%20neutron%20fraction
Record number: 5, Textual support number: 1 OBS
delayed neutron fraction: term and definition standardized by ISO. 2, record 5, English, - delayed%20neutron%20fraction
Record 5, French
Record 5, Domaine(s)
- Physique atomique
- Centrales nucléaires
Record 5, Main entry term, French
- fraction de neutrons retardés
1, record 5, French, fraction%20de%20neutrons%20retard%C3%A9s
correct, feminine noun, standardized
Record 5, Abbreviations, French
Record 5, Synonyms, French
- fraction de neutrons différés 1, record 5, French, fraction%20de%20neutrons%20diff%C3%A9r%C3%A9s
correct, feminine noun, standardized
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Rapport du nombre moyen des neutrons retardés par fission au nombre total des neutrons (instantanés plus retardés) par fission. 1, record 5, French, - fraction%20de%20neutrons%20retard%C3%A9s
Record number: 5, Textual support number: 1 OBS
fraction de neutrons retardés; fraction de neutrons différés : termes et définition normalisés par l'ISO. 2, record 5, French, - fraction%20de%20neutrons%20retard%C3%A9s
Record 5, Spanish
Record 5, Textual support, Spanish
Record 6 - internal organization data 2011-11-24
Record 6, English
Record 6, Subject field(s)
- Atomic Physics
Record 6, Main entry term, English
- reactivity ramp
1, record 6, English, reactivity%20ramp
correct
Record 6, Abbreviations, English
Record 6, Synonyms, English
Record 6, Textual support, English
Record number: 6, Textual support number: 1 CONT
This hypothetical sequence of events may occur within a very short time, and the fission energy released during the reactivity ramp-which is a measure of the gravity level of the accident results from the competition between the lifetime of prompt, and delayed neutrons and the quasi-adiabatic rate of of the core governed, in the most conservative case, by the vapour pressure of the molten fuel. 1, record 6, English, - reactivity%20ramp
Record 6, French
Record 6, Domaine(s)
- Physique atomique
Record 6, Main entry term, French
- rampe de réactivité
1, record 6, French, rampe%20de%20r%C3%A9activit%C3%A9
correct, feminine noun
Record 6, Abbreviations, French
Record 6, Synonyms, French
Record 6, Textual support, French
Record number: 6, Textual support number: 1 CONT
«Rampe» de réactivité. Le problème de la rampe est un exemple où [...] l’équation de Nordheim n’est d’aucune utilité : dans ce scénario, toujours à partir d’une situation critique, on introduit progressivement une réactivité non nulle suivant une loi supposée, pour simplifier, linéaire en fonction du temps [...] 1, record 6, French, - rampe%20de%20r%C3%A9activit%C3%A9
Record 6, Spanish
Record 6, Textual support, Spanish
Record 7 - internal organization data 2010-11-29
Record 7, English
Record 7, Subject field(s)
- Analytical Chemistry
- Atomic Physics
Record 7, Main entry term, English
- differential die-away technique
1, record 7, English, differential%20die%2Daway%20technique
correct
Record 7, Abbreviations, English
- DDT 2, record 7, English, DDT
correct
Record 7, Synonyms, English
Record 7, Textual support, English
Record number: 7, Textual support number: 1 CONT
Active inspection techniques measure [either] delayed radiation, differential die-away, or prompt neutrons. Prompt neutrons are immediately emitted when fission occurs, as opposed to delayed low-energy neutrons and gamma rays, which are emitted by the fission products anywhere from milliseconds to seconds after the fission event. The differential die-away technique pulses neutrons into the cargo and monitors perturbations(if any) in the die-away characteristics of the normal neutron fluence rate that occur between neutron pulses. 3, record 7, English, - differential%20die%2Daway%20technique
Record 7, Key term(s)
- differential die away technique
Record 7, French
Record 7, Domaine(s)
- Chimie analytique
- Physique atomique
Record 7, Main entry term, French
- méthode DDT
1, record 7, French, m%C3%A9thode%20DDT
correct, feminine noun
Record 7, Abbreviations, French
Record 7, Synonyms, French
Record 7, Textual support, French
Record number: 7, Textual support number: 1 DEF
[Technique d’] irradiation séquentielle [d’un objet] associée à la mesure des neutrons prompts entre les impulsions du générateur ou de l’accélérateur [de neutrons.] 2, record 7, French, - m%C3%A9thode%20DDT
Record number: 7, Textual support number: 1 CONT
[…] la méthode DDT permet d’atteindre de très basses limites de détection et ce, grâce à l’utilisation d’un générateur de neutrons (forte intensité interrogatrice [environ 108 à 2 X 109 nanosecondes exposant –1) associée à la mesure des neutrons prompts des fissions induites. 2, record 7, French, - m%C3%A9thode%20DDT
Record number: 7, Textual support number: 1 OBS
[…] quelques exemples d’application [de la méthode DDT] dans le domaine du cycle du combustible : — suivi et inventaire de la matière fissile dans les usines de retraitement; — contrôle de criticité dans les usines de retraitement ou de fabrication; — contrôle des fûts de déchets technologiques; — contrôle des déchets de grand volume contaminés en plutonium; — contrôle et caractérisation pour les besoins du démantèlement. 2, record 7, French, - m%C3%A9thode%20DDT
Record number: 7, Textual support number: 2 OBS
DDT : differential die-away technique. 3, record 7, French, - m%C3%A9thode%20DDT
Record 7, Spanish
Record 7, Textual support, Spanish
Record 8 - internal organization data 2010-11-26
Record 8, English
Record 8, Subject field(s)
- Analytical Chemistry
- Atomic Physics
Record 8, Main entry term, English
- sequential photon interrogation and neutron counting signatures
1, record 8, English, sequential%20photon%20interrogation%20and%20neutron%20counting%20signatures
correct, plural
Record 8, Abbreviations, English
- SPHINCS 2, record 8, English, SPHINCS
correct
Record 8, Synonyms, English
- sequential photon interrogation and neutron counting signatures technique 3, record 8, English, sequential%20photon%20interrogation%20and%20neutron%20counting%20signatures%20technique
correct
Record 8, Textual support, English
Record number: 8, Textual support number: 1 DEF
[A technique that] allows measurement of the prompt and delayed neutrons from thermal and fast-induced fission after each interrogating pulse. 4, record 8, English, - sequential%20photon%20interrogation%20and%20neutron%20counting%20signatures
Record 8, French
Record 8, Domaine(s)
- Chimie analytique
- Physique atomique
Record 8, Main entry term, French
- technique SPHINCS
1, record 8, French, technique%20SPHINCS
correct, feminine noun
Record 8, Abbreviations, French
Record 8, Synonyms, French
- méthode SPHINCS 2, record 8, French, m%C3%A9thode%20SPHINCS
correct, feminine noun
Record 8, Textual support, French
Record number: 8, Textual support number: 1 DEF
[Technique d’] irradiation séquentielle associée à la mesure des neutrons prompts et retardés entre les impulsions du générateur ou de l’accélérateur [de neutrons]. 1, record 8, French, - technique%20SPHINCS
Record number: 8, Textual support number: 1 OBS
SPHINCS : Sequential PHoton Interrogation and Neutron Counting Signatures. 3, record 8, French, - technique%20SPHINCS
Record 8, Spanish
Record 8, Textual support, Spanish
Record 9 - internal organization data 2010-11-15
Record 9, English
Record 9, Subject field(s)
- Atomic Physics
- Nuclear Power Stations
Record 9, Main entry term, English
- fission spectrum
1, record 9, English, fission%20spectrum
correct, standardized
Record 9, Abbreviations, English
Record 9, Synonyms, English
Record 9, Textual support, English
Record number: 9, Textual support number: 1 DEF
For a specified fissionable nuclide : the energy distribution of its prompt neutrons. 1, record 9, English, - fission%20spectrum
Record number: 9, Textual support number: 1 OBS
Sometimes the term also refers to the energy spectrum of the prompt gamma radiation emitted in fission. 1, record 9, English, - fission%20spectrum
Record number: 9, Textual support number: 2 OBS
fission spectrum: term standardized by ISO. 2, record 9, English, - fission%20spectrum
Record 9, French
Record 9, Domaine(s)
- Physique atomique
- Centrales nucléaires
Record 9, Main entry term, French
- spectre de fission
1, record 9, French, spectre%20de%20fission
correct, masculine noun, standardized
Record 9, Abbreviations, French
Record 9, Synonyms, French
Record 9, Textual support, French
Record number: 9, Textual support number: 1 DEF
Pour un nucléide donné, distribution en énergie de ses neutrons instantanés. 2, record 9, French, - spectre%20de%20fission
Record number: 9, Textual support number: 1 OBS
Se rapporte quelquefois aussi au spectre d'énergie du rayonnement gamma instantané émis dans la fission. 2, record 9, French, - spectre%20de%20fission
Record number: 9, Textual support number: 2 OBS
spectre de fission : terme normalisé par l'ISO. 3, record 9, French, - spectre%20de%20fission
Record 9, Spanish
Record 9, Textual support, Spanish
Record 10 - internal organization data 2009-09-09
Record 10, English
Record 10, Subject field(s)
- Measuring Instruments (Engineering)
- Nuclear Fission Reactors
Record 10, Main entry term, English
- shielded-emitter neutron detector
1, record 10, English, shielded%2Demitter%20neutron%20detector
correct
Record 10, Abbreviations, English
Record 10, Synonyms, English
- shielded self-powered neutron detector 2, record 10, English, shielded%20self%2Dpowered%20neutron%20detector
proposal
- shielded SPND 2, record 10, English, shielded%20SPND
proposal
Record 10, Textual support, English
Record number: 10, Textual support number: 1 CONT
A self-powered neutron detector has a neutron-sensitive emitter, a collector enclosing this emitter and insulation between these two components. When irradiated by neutrons, the emitter generates Compton electrons so that a current is produced between the emitter and electrode and which may be used with a current-measuring device to provide a readout. The emitter is enclosed and electrically connected with a metal which is substantially neutron-insensitive so that the detector provides a substantially true and prompt signal accurately reflecting the neutron flux density received by the detector. 1, record 10, English, - shielded%2Demitter%20neutron%20detector
Record 10, French
Record 10, Domaine(s)
- Instruments de mesure (Ingénierie)
- Réacteurs nucléaires de fission
Record 10, Main entry term, French
- collectron chemisé
1, record 10, French, collectron%20chemis%C3%A9
correct, masculine noun
Record 10, Abbreviations, French
Record 10, Synonyms, French
Record 10, Textual support, French
Record number: 10, Textual support number: 1 CONT
développement de collectrons chemisés [...] Le CEA [Commissariat à l'énergie atomique] a travaillé sur les collectrons cobalt, qui sont intrinsèquement rapides, et a cherché à diminuer l'influence des rayonnements b et g incidents [...]. Pour ce faire, l'émetteur est chemisé avec un matériau de revêtement en acier. De plus ce chemisage joue le rôle d'écran vis-à-vis des électrons parasites nés dans l'émetteur : sa masse surfacique est calculée pour absorber les rayonnements b de faible énergie et ne laisser passer que les électrons prompts qui sont à haute énergie. 1, record 10, French, - collectron%20chemis%C3%A9
Record 10, Spanish
Record 10, Textual support, Spanish
Record 11 - external organization data 2009-03-01
Record 11, English
Record 11, Subject field(s)
- Nuclear Physics
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 11, Main entry term, English
- prompt criticality 1, record 11, English, prompt%20criticality
Record 11, Abbreviations, English
Record 11, Synonyms, English
- prompt critical 1, record 11, English, prompt%20critical
Record 11, Textual support, English
Record number: 11, Textual support number: 1 CONT
In nuclear engineering, an assembly is prompt critical if for each nuclear fission event, one or more of the immediate or prompt neutrons released causes an additional fission event. This causes a rapidly exponential increase in the number of fission events, and an explosion. 1, record 11, English, - prompt%20criticality
Record 11, French
Record 11, Domaine(s)
- Physique nucléaire
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 11, Main entry term, French
- criticité instantanée
1, record 11, French, criticit%C3%A9%20instantan%C3%A9e
correct, feminine noun
Record 11, Abbreviations, French
Record 11, Synonyms, French
Record 11, Textual support, French
Record number: 11, Textual support number: 1 DEF
Criticité qui serait atteinte sous l'action des seuls neutrons instantanés et conduirait à une situation accidentelle grave. 2, record 11, French, - criticit%C3%A9%20instantan%C3%A9e
Record number: 11, Textual support number: 1 CONT
Effet des neutrons instantanés considérés seuls, et criticité instantanée. Les équations de la période du réacteur et des changements de puissance (1, 2, 3 et 4) permettent de prévoir avec exactitude les changements de puissance en autant que [delta majuscule]k prenne une valeur faible, ce qui est propre aux additions de réactivité effectuées pour la régulation normale du réacteur. 3, record 11, French, - criticit%C3%A9%20instantan%C3%A9e
Record 11, Spanish
Record 11, Textual support, Spanish
Record 12 - external organization data 2006-01-25
Record 12, English
Record 12, Subject field(s)
- Heat (Physics)
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 12, Main entry term, English
- heat source 1, record 12, English, heat%20source
Record 12, Abbreviations, English
Record 12, Synonyms, English
Record 12, Textual support, English
Record number: 12, Textual support number: 1 CONT
[The] three main moderator heat sources [are at] full reactor power... : a) The prompt radiation from fission(neutrons and gamma rays) produce 70% to 80% of the heat in the moderator. The neutrons typically contribute more than half of this.... b) gamma rays from fission product decay and from decay of activation products in reactor components produce 15% to 25% of the heat in the moderator. This heat decreases slowly after a reactor shut down. c) Conventional heating(conduction, convection, thermal radiation and friction) accounts for about 3% to 5% of moderator heating. 1, record 12, English, - heat%20source
Record 12, French
Record 12, Domaine(s)
- Chaleur (Physique)
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 12, Main entry term, French
- source du réchauffement
1, record 12, French, source%20du%20r%C3%A9chauffement
feminine noun
Record 12, Abbreviations, French
Record 12, Synonyms, French
- source chaude 1, record 12, French, source%20chaude
feminine noun
Record 12, Textual support, French
Record number: 12, Textual support number: 1 CONT
Connaître les trois sources principales du réchauffement du modérateur. [...] Lorsque le réacteur fonctionne à pleine puissance, les sources chaudes du modérateur sont : a) Le rayonnement prompt imputable à la fission (neutrons et rayons gamma) produit 70 % à 80 % de la chaleur dans le modérateur. Les neutrons contribuent habituellement à plus de la moitié de cette chaleur. [...] b) Les rayons gamma issus de la désintégration des produits de fission et de la désintégration des produits d'activation dans les composants de réacteur produisent entre 15 % et 25 % de la chaleur dans le modérateur. Cette chaleur diminue lentement après la mise à l'arrêt du réacteur. c) Le chauffage classique (conduction, convexion, rayonnement thermique et frottement) représente environ 3 % à 5 % du chauffage du modérateur. 1, record 12, French, - source%20du%20r%C3%A9chauffement
Record 12, Spanish
Record 12, Textual support, Spanish
Record 13 - external organization data 2005-08-17
Record 13, English
Record 13, Subject field(s)
- Nuclear Physics
- Nuclear Fission Reactors
- Compartment - Canadian Nuclear Safety Commission
Record 13, Main entry term, English
- prompt radiation 1, record 13, English, prompt%20radiation
Record 13, Abbreviations, English
Record 13, Synonyms, English
Record 13, Textual support, English
Record number: 13, Textual support number: 1 CONT
Prompt radiation from fission produces about 75% of moderator heating. Over half of this results from the moderator doing its job : slowing down fast neutrons. Absorption of prompt gamma radiation accounts for the rest. 1, record 13, English, - prompt%20radiation
Record 13, French
Record 13, Domaine(s)
- Physique nucléaire
- Réacteurs nucléaires de fission
- Tiroir - Commission canadienne de sûreté nucléaire
Record 13, Main entry term, French
- rayonnement instantanée
1, record 13, French, rayonnement%20instantan%C3%A9e
masculine noun
Record 13, Abbreviations, French
Record 13, Synonyms, French
- rayonnement prompt 1, record 13, French, rayonnement%20prompt
masculine noun
Record 13, Textual support, French
Record number: 13, Textual support number: 1 CONT
Le rayonnement prompt issu de la fission produit environ 75 % du chauffage du modérateur. Plus de la moitié de cette chaleur provient du rôle joué par le modérateur : il ralentit les neutrons rapides. 1, record 13, French, - rayonnement%20instantan%C3%A9e
Record 13, Spanish
Record 13, Textual support, Spanish
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