TERMIUM Plus^®

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What is uranium enrichment? Enrichment is a process that increases the capacity of uranium to fuel a nuclear chain reaction, either for use in nuclear power plants or for nuclear weapons. Uranium primarily occurs naturally as two isotopes : 99. 3% is uranium-238 and 0. 7% is uranium-235. Their atoms are identical except for the number of neutrons in the nucleus : uranium-238 has three more and this makes it less able to fission. Uranium enrichment is used to increase the percentage of the fissile U-235.  2, record 1, English, - uranium%20enrichment

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Les opérations d'enrichissement de l'uranium consistent à augmenter la proportion d'U 235, seul capable d'entretenir une réaction en chaîne.  2, record 1, French, - enrichissement%20de%20l%27uranium

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Le risque de rapprochement accidentel de quantités [d'uranium] suffisantes pour déclencher une réaction en chaîne s'élève parallèlement au degré d'enrichissement de l'uranium. Bien que la probabilité des accidents de criticité soit très faible, il convient de ne négliger aucun soin pour prévenir tout événement de ce type.  3, record 1, French, - enrichissement%20de%20l%27uranium

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El enriquecimiento de uranio es el proceso al cual es sometido el uranio natural para obtener el isótopo 235U conocido como uranio enriquecido. El uranio natural se compone principalmente del isótopo 238U, con una proporción en peso de alrededor del 0,7 % de 235U, el único isótopo en cantidad apreciable existente en la naturaleza que es fisionable mediante neutrones térmicos. Durante el enriquecimiento, el contenido porcentual de 235U en el uranio natural se incrementa gracias al proceso de separación de isótopos.  1, record 1, Spanish, - enriquecimiento%20de%20uranio

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A very small particle of matter that is thought to form protons, neutrons, [or other].  2, record 2, English, - quark

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Based on current experimental evidence, quarks seem to be truly fundamental particles; they cannot be further subdivided.  3, record 2, English, - quark

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Dans des conditions ordinaires, les quarks n'existent pas à l'état isolé, on ne les trouve qu'associés en petits groupes appelés hadrons.  2, record 2, French, - quark

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Partícula elemental que es componente de otras partículas subatómicas, como el protón y el neutrón, y que no existe de manera aislada.  2, record 2, Spanish, - cuark

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cuark; quark: La Fundación del Español Urgente (Fundéu BBVA), con el asesoramiento de la Real Academia Española, indica que la voz inglesa "quark", que alude en física a un tipo de partícula, se ha adaptado al español como "cuark". [...] Tal como aclara la segunda edición del Diccionario panhispánico de dudas, la grafía con ce es la adaptación de "quark" [...] El diccionario también recoge "quark", en cursiva, pero da preferencia a la forma adaptada.  3, record 2, Spanish, - cuark

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Everything that we can see and touch is made up of particles, the basic building blocks of nature. Particles like protons, neutrons, and electrons compose the atoms of the computer or phone you are touching right now.... Many technologies we commonly use today are the results of research spin-off from particle physics. These byproducts were developed to build and run experiments or to support the activities of the particle physics community. Two impactful examples include medical scanners used in hospitals and the World Wide Web. Both are indirect products of fundamental research conducted by particle physicists while conducting their primary research.  1, record 3, English, - particle%20physicist

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The small and dense region consisting of protons and neutrons at the center of an atom...  2, record 4, English, - atomic%20nucleus

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atomic nuclei: plural.  3, record 4, English, - atomic%20nucleus

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[...] région située au centre d'un atome constituée de protons et de neutrons.  3, record 4, French, - noyau%20atomique

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Le noyau de l'atome, aussi appelé noyau atomique, a la forme d'une sphère. Il est uniquement composé de protons et de neutrons.  2, record 4, French, - noyau%20atomique

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Parte central del átomo, compuesta de protones [...] y de neutrones.  3, record 4, Spanish, - n%C3%BAcleo%20at%C3%B3mico

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In nuclear physics, an atomic nucleus is called a halo nucleus or is said to have a nuclear halo when it has a core nucleus surrounded by a halo of orbiting protons or neutrons. The electrons then orbit the core nucleus much further away than the orbit of the halo nucleons.  2, record 5, English, - halo%20nucleus

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halo nuclei: plural form.  3, record 5, English, - halo%20nucleus

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Les noyaux les plus légers possèdent des propriétés étonnantes, c'est le cas des noyaux à halos comme le Lithium 11 ou le Béryllium 14. Ces noyaux comportent un halo formé d'un ou plusieurs neutrons, qui se trouvent à une distance importante du reste du noyau.  2, record 5, French, - noyau%20%C3%A0%20halo

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A tetraneutron is a hypothetical stable cluster of four neutrons.  2, record 6, English, - tetraneutron

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Le tétraneutron est une particule hypothétique, constituée de quatre neutrons en interaction [...]  2, record 6, French, - t%C3%A9traneutron

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One of eight hypothetical massless particles with spin quantum number and negative parity that mediate strong intersection between quarks.  2, record 7, English, - gluon

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[The] gluon is the so-called messenger particle of the strong nuclear force, which binds subatomic particles known as quarks within the protons and neutrons of stable matter as well as within heavier, short-lived particles created at high energies.  3, record 7, English, - gluon

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Particule de liaison située au sein du proton.  2, record 7, French, - gluon

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Le nom gluon vient de «glue» [colle], car il permet de «coller» les quarks entre eux par l'interaction forte qui, comme son nom l'indique, est beaucoup plus forte que les autres interactions.  3, record 7, French, - gluon

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(...) la interacción fuerte está mediada por los ochos "gluones", carentes de masa. Así, el protón consta de tres quarks que se mantienen unidos por intercambio de gluones.  2, record 7, Spanish, - glu%C3%B3n

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In nuclear physics, an atomic nucleus is called a halo nucleus or is said to have a nuclear halo when it has a core nucleus surrounded by a halo of orbiting protons or neutrons. The electrons then orbit the core nucleus much further away than the orbit of the halo nucleons.  1, record 8, English, - nuclear%20halo

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[The] theory that describes the action of the strong force.  3, record 9, English, - quantum%20chromodynamics

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Quarks and antiquarks are the teeny, tiny building blocks with which all matter is built, binding together to form protons and neutrons in a process explained by quantum chromodynamics(QCD).  4, record 9, English, - quantum%20chromodynamics

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Construite sur le modèle de l'électrodynamique, la théorie de la chromodynamique quantique explique l'interaction nucléaire forte responsable de la cohésion des noyaux atomiques.  4, record 9, French, - chromodynamique%20quantique

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La teoría de fase de la interacción fuerte, propuesta a principios de los años setenta, se conoce por cromodinámica cuántica, debido a que explica dicha interacción a través del "color" de los quarks intervinientes.  1, record 9, Spanish, - cromodin%C3%A1mica%20cu%C3%A1ntica

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According to the theories of physics, if we were to look at the Universe one second after the Big Bang, what we would see is a 10-billion degree sea of neutrons, protons, electrons, anti-electrons(positrons), photons, and neutrinos.  3, record 10, English, - Big%20Bang

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Théorie cosmologique selon laquelle l'Univers a son origine dans un état primitif hypercondensé à partir duquel il est toujours en expansion.  3, record 10, French, - big%20bang

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Baryons are heavy subatomic particles that are made up of three quarks. Both protons and neutrons, as well as other particles, are baryons.  2, record 11, English, - baryon

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Les baryons sont par définition les hadrons qui ont un spin demi-entier. On leur associe un «nombre baryonique» B égal à 1 ou à -1, selon qu'il s'agit d'une particule ou d'une antiparticule [...]  2, record 11, French, - baryon

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The baryonic matter of which the Earth, other planets, and stars are made consists of atoms and their parts—protons, neutrons, and electrons.  3, record 12, English, - baryonic%20matter

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La matière baryonique est la matière ordinaire qui compose l'univers observable. Formée de baryons, elle compose tout ce qui nous entoure. Pourtant, il manque des baryons dans les calculs basés sur l'univers observable, ce qui signifie que la moitié de la matière ordinaire est manquante.  2, record 12, French, - mati%C3%A8re%20baryonique

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An essential part of a nuclear reactor, used to slow down or "moderate" neutrons produced by the nuclear fuel.  1, record 13, English, - reactor%20moderator

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Composante essentielle d'un réacteur nucléaire [qui] sert à ralentir ou à «modérer» les neutrons produits par le combustible nucléaire.  1, record 13, French, - mod%C3%A9rateur%20du%20r%C3%A9acteur

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A fundamental interaction experienced by elementary particles(as hadrons) that is more powerful than any other known force and is responsible for the binding together of neutrons and protons in the atomic nucleus and for processes of particle creation in high-energy collisions.  5, record 14, English, - strong%20nuclear%20force

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[Interaction] élémentaire responsable de la force forte et transmise par les gluons.  3, record 14, French, - interaction%20nucl%C3%A9aire%20forte

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Pour les spécialistes de la physique nucléaire, l'interaction forte désigne donc la force responsable de la cohésion des noyaux atomiques. Sans interaction forte, le noyau des atomes cèderait à la répulsion électrostatique des protons entre eux.  4, record 14, French, - interaction%20nucl%C3%A9aire%20forte

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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 15, English, - dollar

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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 15, French, - dollar

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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 15, French, - dollar

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Uranium-water power reactors have a complicated core composition, and temperature changes, the influence of which exceeds that of delayed neutrons several times, are important in the reactivity balance of such reactors. The accuracy with which the temperature effect of the reactivity can be predicted by calculation techniques depends greatly upon the extent to which these techniques correctly describe the physics of the development of the process and … the accuracy decreases considerably in proportion to the complexity of the core composition.  1, record 16, English, - temperature%20effect

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Toute modification des propriétés neutroniques d’un milieu ou d’un cœur observée si l’une ou l’autre des températures des matériaux qui le constitue varie.  1, record 16, French, - effet%20de%20temp%C3%A9rature

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A nuclear reactor that produces more fuel than it consumes and that derives most of its energy from nuclear fission initiated by neutrons that have not slowed down to the thermal range.  6, record 17, English, - fast%20breeder%20reactor

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The fast breeder reactor derives its name from the ability to breed, that is to create more fissionable material than it consumes; and from the fact that its neutrons travel faster than they do in a thermal reactor.  7, record 17, English, - fast%20breeder%20reactor

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La surgénération, caractéristique des réacteurs à neutrons rapides. Le cœur de tout réacteur nucléaire est le siège de destruction de matière fissile par absorption (fission ou capture) de neutrons par des noyaux fissiles et de production de matière fissile par capture de neutrons par des noyaux fertiles. Le rapport entre la production et la destruction de noyaux fissiles est appelé taux de régénération dans les RNR ou taux de conversion dans les REP.  5, record 17, French, - r%C3%A9acteur%20surg%C3%A9n%C3%A9rateur%20rapide

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Selon l'Arrêté ministériel du 30 novembre 1989 relatif à l'enrichissement de la terminologie de l'ingénierie nucléaire, «surrégénérateur» est tombé en désuétude.  6, record 17, French, - r%C3%A9acteur%20surg%C3%A9n%C3%A9rateur%20rapide

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In the most common type of high temperature reactor (HTR) fuel, tiny particles of nuclear fuel are coated with three or four layers of coatings which are impenetrable to fission products up to a temperature of 2000 celsius. About 20,000 particles, bonded with graphite are massed together to form a spherical fuel element with a diameter of about 6 centimeters. The high temperature reactor ... might contain 100,000 or more of these fuel elements.  5, record 18, English, - fuel%20pebble

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The pebbles are... designed to passively limit the amount of heat unleashed by the nuclear fission reactions that drive the reactor. The fissionable material is divided into groups of 100 million billion uranium-235 atoms scattered within a 0. 5 mm sphere of uranium dioxide. That core is coated with four containment layers.... Some 15, 000 carbon-coated uranium dioxide kernels, looking like nuclear poppy seeds, are embedded in a tennis ball-size graphite and resin matrix. Graphite acts to slow the fission neutrons and so acts as an embedded moderator. The matrix is then encased in a 5 mm pure carbon shell, sintered, annealed, and machined to a uniform diameter of 6 cm.  2, record 18, English, - fuel%20pebble

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Les particules [de combustible] sont agglomérées au moyen d'une matrice carbonée de manière à former des corps sphériques [...] aisément manipulables. [...] le combustible est sous forme de boulets de 60 mm de diamètre, ayant une écorce de 5 mm sans particule, chargés en vrac dans le cœur [du réacteur qui] est formé par un très grand nombre de boulets (675 000 pour [un réacteur] THTR [thorium high temperature reactor] de 300 MW de puissance électrique). L'ensemble de ces boulets est contenu dans une large trémie en graphite, faisant office de réflecteur, munie au sommet d'un couvercle de même matière, et d'un (ou plusieurs) trou d'évacuation des combustibles à la base.  2, record 18, French, - boulet

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Chaque boulet mesure environ 60 mm de diamètre et renferme environ 11 500 particules. L'extérieur du boulet, sur 5 mm, ne contient pas de particule, renforçant ainsi le confinement des matières radioactives dans la matrice de graphite. Le cœur du réacteur sera constitué par un empilement de plusieurs centaines de milliers de boulets.  3, record 18, French, - boulet

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Nuclear reactors can be controlled by a mechanical control rod system for a very subtle reason. In a chain reaction there are only fractions of seconds between one fission event and the next one(s), initiated by the former. However, since a small fraction of the neutrons needed to keep the chain going are generated with a delay in the range of ten seconds the necessary response time of the control system is in the range of 0. 1 seconds, thus making mechanical control possible in the first place. For plutonium the delayed neutron fraction is almost a factor of three smaller than for uranium, increasing demands on the control system.  2, record 19, English, - mechanical%20control%20rod

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Cœur du réacteur. [...] Les dispositifs de réglage de la réactivité montés verticalement comprennent [...] les barres de commande mécaniques qui se trouvent normalement à l'extérieur du cœur. Elles sont insérées pour compléter la réactivité négative des barres de commande à eau ordinaire ou on les fait chuter pour effectuer une réduction rapide de la puissance.  1, record 19, French, - barre%20de%20commande%20m%C3%A9canique

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The subcritical core multiplies the neutrons that were born in the target using nuclear fuel. In the design of the subcritical core several parameters play an important role.  3, record 20, English, - sub%2Dcritical%20core

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The MYRRHA subcritical core consists of hexagonal assemblies of MOX Fast Reactor-type fuel pins with an active length of 600 mm placed centrally in a LM pool ...  4, record 20, English, - sub%2Dcritical%20core

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A material or a body of material which reflects incident radiation.  1, record 21, English, - reflector

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In nuclear reactor technology, this term is usually restricted to designate part of a reactor placed adjacent to the core to scatter some of the escaping neutrons back into the core.  1, record 21, English, - reflector

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Matière ou objet qui réfléchit un rayonnement incident.  1, record 21, French, - r%C3%A9flecteur

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En technologie des réacteurs nucléaires, ce terme est habituellement réservé pour désigner une partie du réacteur placée en bordure du cœur en vue de lui renvoyer des neutrons qui s'en échappent.  1, record 21, French, - r%C3%A9flecteur

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Capa de grafito, berilio u otra materia que rodea a un reactor nuclear o a una bomba atómica y sirve para reflejar hacia el interior los neutrones que, al escaparse y no poder participar en la reacción de cadena, disminuirán el rendimiento de la misma.  1, record 21, Spanish, - reflector

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Neutron absorbing glass compositions.  3, record 22, English, - neutron%20absorbing%20glass

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[Perrin and Peierls] demonstrated the idea of introducing neutron-absorbing material to limit the multiplication of neutrons and thus control the nuclear reaction(which is the basis for the operation of a nuclear power station).  4, record 22, English, - neutron%20absorbing%20glass

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Les guides de neutrons sont des tubes vides de section rectangulaire dont la surface interne est recouverte d'un matériau réfléchissant les neutrons. [...] les particules fortement énergétiques émises dans le cœur du réacteur et se propageant en ligne droite sont absorbés par les parois des guides. Dans les parties de guides éloignées du cœur du réacteur, ces parois sont composées de verre boré fortement absorbeur de neutrons : elles constituent donc aussi une excellente protection biologique.  1, record 22, French, - verre%20absorbeur%20de%20neutrons

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Ce «pilotage» s'effectue au moyen de barres de commande composées de matériaux absorbant les neutrons.  3, record 22, French, - verre%20absorbeur%20de%20neutrons

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A process by which neutrons liberated by the fission of a heavy nucleus may strike and split other fissible nuclei liberating more neutrons which in turn may cause more fissions.  3, record 23, English, - fission%20chain%20reaction

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Cœur : Région d'un réacteur nucléaire à fission comprenant le combustible nucléaire et agencée pour être le siège d'une réaction de fission en chaîne.  1, record 23, French, - r%C3%A9action%20de%20fission%20en%20cha%C3%AEne

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A layer of material immediately surrounding a nuclear reactor core that scatters back(reflects) into the core the neutrons that otherwise would escape. The returned neutrons can then cause more fission and improve the neutron economy of the reactor.  2, record 24, English, - reflector

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reflector: term standardized by ISO.  3, record 24, English, - reflector

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Matière ou objet qui réfléchit un rayonnement incident. En technologie des réacteurs nucléaires, ce terme est habituellement réservé pour désigner une partie du réacteur placée en bordure du cœur en vue de lui renvoyer des neutrons qui s'en échappent. [Définition normalisée par l'ISO.]  1, record 24, French, - r%C3%A9flecteur

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réflecteur : terme normalisé par l'ISO.  2, record 24, French, - r%C3%A9flecteur

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... MAPLE is tiny-just five metres high and one and a half metres in diameter at its widest point. The reactor core, which is loaded with 32 kilograms of uranium fuel, is the size of a large wastepaper basket. The entire reactor assembly rests in a pool of ordinary water, about 9. 5 metres deep and a minimum of two metres across, contained by a two-metre-thick wall of heavy concrete lined with stainless steel. The water is used to cool the fuel, establish the chain reaction that generates the neutrons, and shield researchers from radiation emanating from the core.  1, record 25, English, - MAPLE%20reactor

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[...] le MAPLE est minuscule : à peine cinq mètres de hauteur et 1 m 50 de diamètre dans sa plus grande largeur. Le cœur du réacteur, chargé de 32 kg de combustible d'uranium, a les dimensions d'une grande corbeille à papier. L'ensemble du réacteur repose dans une piscine d'eau ordinaire, d'une profondeur d'environ 9 m 50 et d'une largeur minimale de deux mètres, entourée d'un mur de deux mètres d'épaisseur, en béton lourd doublé d'acier inoxydable. L'eau refroidit le combustible, établit la réaction en chaîne produisant les neutrons, et protège les chercheurs contre les radiations émanant du cœur.  1, record 25, French, - r%C3%A9acteur%20MAPLE

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Nuclear power is a type of thermal power in which electricity is generated from steam produced by the fissioning, or splitting, of uranium 235 atoms being bombarded by neutrons.  2, record 26, English, - nuclear%20power

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L’énergie nucléaire est un type d’énergie thermique qui consiste à produire de l’électricité à partir de la vapeur générée par la fission d’atomes d’uranium-235 bombardés de neutrons.  2, record 26, French, - %C3%A9nergie%20nucl%C3%A9aire

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A nucleus, issued from a fission reaction, that emits delayed neutrons.  2, record 27, English, - precursor%20nucleus

Record number: 27, Textual support number: 1 CONT

Analysis of the emission of delayed neutrons-the E-decay energy of the precursor nucleus of the delayed neutrons and the binding energy of a neutron …  3, record 27, English, - precursor%20nucleus

Record 27,  Textual support,  French

Record number: 27, Textual support number: 1 DEF

Noyau issu de fission, émetteur de neutrons retardés.  2, record 27, French, - noyau%20pr%C3%A9curseur

Record number: 27, Textual support number: 1 CONT

Les techniques de détection mises en œuvre permettent d’étudier l’ensemble des modes de décroissance des noyaux précurseurs, leur étude, ainsi que l’image de la structure nucléaire des noyaux produits dans la désintégration.  3, record 27, French, - noyau%20pr%C3%A9curseur

Record 27,  Textual support,  Spanish

Record 28,  Textual support,  English

Record number: 28, Textual support number: 1 DEF

A phenomenon in which radiation transfers some or all of its energy to matter which it traverses. [Definition standardized by ISO.]  2, record 28, English, - energy%20absorption

Record number: 28, Textual support number: 1 OBS

Scattering accompanied by energy loss, as in the Compton effect and slowing down of neutrons, is considered to be energy absorption.  2, record 28, English, - energy%20absorption

Record number: 28, Textual support number: 2 OBS

energy absorption: term officially approved by the Lexicon Project Committee (New Brunswick).  3, record 28, English, - energy%20absorption

Record 28,  Textual support,  French

Record number: 28, Textual support number: 1 DEF

Phénomène par lequel un rayonnement traversant une matière transfère à celle-ci une partie ou la totalité de son énergie. [Définition normalisée par l'ISO.]  2, record 28, French, - absorption%20d%27%C3%A9nergie

Record number: 28, Textual support number: 1 OBS

La diffusion qui est accompagnée d'une perte d'énergie, comme dans l'effet Compton et le ralentissement des neutrons, est considérée comme étant une absorption d'énergie.  2, record 28, French, - absorption%20d%27%C3%A9nergie

Record number: 28, Textual support number: 2 OBS

absorption d'énergie : terme uniformisé par le Comité du projet de lexiques (Nouveau-Brunswick).  3, record 28, French, - absorption%20d%27%C3%A9nergie

Record 28,  Textual support,  Spanish

Record 29,  Textual support,  English

Record number: 29, Textual support number: 1 DEF

Radioactivity created when substances are bombarded with neutrons, as from a nuclear explosion or in a reactor, or with charged particles produced by accelerators.  4, record 29, English, - induced%20radioactivity

Record number: 29, Textual support number: 1 OBS

induced radioactivity: term standardized by ISO in 1997.  5, record 29, English, - induced%20radioactivity

Record number: 29, Textual support number: 2 OBS

induced radioactivity: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  5, record 29, English, - induced%20radioactivity

Record 29,  Textual support,  French

Record number: 29, Textual support number: 1 DEF

Production, par une réaction nucléaire, d'un noyau radioactif inconnu à l'état naturel, qui se désintègre ensuite, suivant les mêmes lois que celles de la radioactivité naturelle.  4, record 29, French, - radioactivit%C3%A9%20induite

Record number: 29, Textual support number: 1 OBS

radioactivité induite : terme normalisé par l'ISO en 1997.  5, record 29, French, - radioactivit%C3%A9%20induite

Record number: 29, Textual support number: 2 OBS

radioactivité induite : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  5, record 29, French, - radioactivit%C3%A9%20induite

Record 29,  Textual support,  Spanish

Record number: 29, Textual support number: 1 CONT

Las reacciones nucleares permiten modificar artificialmente el núcleo de un elemento estable y obtener un isótopo radiactivo o un nuevo elemento inexistente en la naturaleza. [...] A la radiactividad así engendrada se le da los nombres de radiactividad inducida y radiactividad artificial.  3, record 29, Spanish, - radiactividad%20artificial

Record 30,  Textual support,  English

Record number: 30, Textual support number: 1 DEF

isotones : Nuclides having the same number of neutrons but different atomic numbers.  2, record 30, English, - isotone

Record number: 30, Textual support number: 1 OBS

isotone: The plural form of this term (isotones) and the plural definition were standardized by ISO in 1997.  3, record 30, English, - isotone

Record number: 30, Textual support number: 2 OBS

isotone: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  3, record 30, English, - isotone

Record 30,  Textual support,  French

Record number: 30, Textual support number: 1 DEF

nucléides isotones : Nucléides ayant le même nombre de neutrons, mais des numéros atomiques différents.  3, record 30, French, - nucl%C3%A9ide%20isotone

Record number: 30, Textual support number: 1 OBS

nucléide isotone : Le terme au pluriel (nucléides isotones) et la définition au pluriel ont été normalisés par l'ISO en 1997.  4, record 30, French, - nucl%C3%A9ide%20isotone

Record number: 30, Textual support number: 2 OBS

isotone : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  4, record 30, French, - nucl%C3%A9ide%20isotone

Record 30,  Textual support,  Spanish

Record 31,  Textual support,  English

Record number: 31, Textual support number: 1 DEF

The accumulation in a nuclear reactor of xenon-135, formed by beta decay of iodine-135 ...  2, record 31, English, - xenon%20poisoning

Record number: 31, Textual support number: 1 CONT

A major contribution to the sequence of events leading to the Chernobyl nuclear disaster was the failure to anticipate the effect of "xenon poisoning" on the rate of the nuclear fission reaction in the Chernobyl nuclear reactor.... With the extremely low power level, xenon builds up in the fuel rods, "poisoning" the reaction by absorbing neutrons.  3, record 31, English, - xenon%20poisoning

Record number: 31, Textual support number: 1 OBS

Not to be confused with "xenon effect" (reduction in reactivity caused by xenon poisoning.)  4, record 31, English, - xenon%20poisoning

Record number: 31, Textual support number: 2 OBS

xenon poisoning: term standardized by ISO in 1997.  4, record 31, English, - xenon%20poisoning

Record number: 31, Textual support number: 3 OBS

xenon poisoning: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  4, record 31, English, - xenon%20poisoning

Record 31,  Textual support,  French

Record number: 31, Textual support number: 1 DEF

Accumulation [dans un réacteur nucléaire] de xénon 135, un produit de fission qui est un absorbant de neutrons très efficace pouvant interrompre la réaction en chaîne.  4, record 31, French, - empoisonnement%20x%C3%A9non

Record number: 31, Textual support number: 1 OBS

Ne pas confondre avec «effet xénon» (réduction de la réactivité provoquée par l'empoisonnement xénon).  5, record 31, French, - empoisonnement%20x%C3%A9non

Record number: 31, Textual support number: 2 OBS

empoisonnement xénon : terme normalisé par l'ISO en 1997.  5, record 31, French, - empoisonnement%20x%C3%A9non

Record number: 31, Textual support number: 3 OBS

empoisonnement xénon : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  5, record 31, French, - empoisonnement%20x%C3%A9non

Record 31,  Textual support,  Spanish

Record 32,  Textual support,  English

Record number: 32, Textual support number: 1 DEF

The reduction of the neutron energy by scattering without appreciable capture.  4, record 32, English, - neutron%20moderation

Record number: 32, Textual support number: 1 CONT

Moderation of neutrons. The energy of neutrons depends on their speed. When neutrons are in motion in solid materials, their speed is reduced due to repeated collision with nuclei and the scattering which results. This is termed "neutron moderation"...  5, record 32, English, - neutron%20moderation

Record number: 32, Textual support number: 1 OBS

moderation: term and definition standardized by ISO in 1997.  6, record 32, English, - neutron%20moderation

Record number: 32, Textual support number: 2 OBS

moderation: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  6, record 32, English, - neutron%20moderation

Record 32,  Textual support,  French

Record number: 32, Textual support number: 1 DEF

Réduction de l'énergie des neutrons par diffusion sans capture appréciable.  4, record 32, French, - mod%C3%A9ration%20neutronique

Record number: 32, Textual support number: 1 OBS

modération : terme et définition normalisés par l'ISO en 1997.  5, record 32, French, - mod%C3%A9ration%20neutronique

Record number: 32, Textual support number: 2 OBS

modération : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  5, record 32, French, - mod%C3%A9ration%20neutronique

Record 32,  Textual support,  Spanish

Record 33,  Textual support,  English

Record number: 33, Textual support number: 1 DEF

The net energy required to decompose a system into its constituent particles.  3, record 33, English, - nuclear%20binding%20energy

Record number: 33, Textual support number: 1 CONT

At the nuclear level, binding energy is also equal to the energy liberated when a nucleus is created from other nucleons or nuclei. This nuclear binding energy(binding energy of nucleons into a nuclide) is derived from the nuclear force(residual strong interaction) and is the energy required to disassemble a nucleus into the same number of free, unbound neutrons and protons it is composed of, so that the nucleons are far/distant enough from each other [and] the nuclear force can no longer cause the particles to interact.  4, record 33, English, - nuclear%20binding%20energy

Record number: 33, Textual support number: 1 OBS

binding energy: term and definition standardized by ISO in 1997.  5, record 33, English, - nuclear%20binding%20energy

Record number: 33, Textual support number: 2 OBS

binding energy: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  5, record 33, English, - nuclear%20binding%20energy

Record 33,  Textual support,  French

Record number: 33, Textual support number: 1 DEF

Énergie nette nécessaire pour décomposer un système en ses particules constitutives.  2, record 33, French, - %C3%A9nergie%20de%20liaison

Record number: 33, Textual support number: 1 CONT

L'énergie de liaison est aussi égale à la quantité d'énergie libérée lors de la formation du système lié à partir de ses constituants séparés.  3, record 33, French, - %C3%A9nergie%20de%20liaison

Record number: 33, Textual support number: 1 OBS

énergie de liaison : terme et définition normalisés par l'ISO en 1997.  4, record 33, French, - %C3%A9nergie%20de%20liaison

Record number: 33, Textual support number: 2 OBS

énergie de liaison : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  4, record 33, French, - %C3%A9nergie%20de%20liaison

Record 33,  Textual support,  Spanish

Record 34,  Textual support,  English

Record number: 34, Textual support number: 1 DEF

For resonance levels excited in a specified nuclide by neutrons, the average reduced neutron width of the resonances divided by the mean level spacing.  2, record 34, English, - strength%20function

Record number: 34, Textual support number: 1 OBS

strength function: term standardized by ISO.  3, record 34, English, - strength%20function

Record 34,  Textual support,  French

Record number: 34, Textual support number: 1 DEF

Pour des niveaux de résonance excités par des neutrons dans un nucléide déterminé, rapport de la largeur réduite moyenne des résonances à l'espacement moyen des résonances.  3, record 34, French, - fonction%20densit%C3%A9

Record number: 34, Textual support number: 1 OBS

fonction densité : terme normalisé par l'ISO.  4, record 34, French, - fonction%20densit%C3%A9

Record number: 34, Textual support number: 2 OBS

fonction de densité : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  4, record 34, French, - fonction%20densit%C3%A9

Record 34,  Textual support,  Spanish

Record 35,  Textual support,  English

Record number: 35, Textual support number: 1 DEF

In the Westcott model, a factor which takes into account the fraction of epithermal neutrons present.  2, record 35, English, - Westcott%20r%2Dfactor

Record number: 35, Textual support number: 1 OBS

Westcott r-factor: term standardized by ISO.  3, record 35, English, - Westcott%20r%2Dfactor

Record number: 35, Textual support number: 2 OBS

Westcott r-factor: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  3, record 35, English, - Westcott%20r%2Dfactor

Record 35,  Textual support,  French

Record number: 35, Textual support number: 1 DEF

Facteur utilisé dans le modèle de Westcott pour tenir compte de la fraction des neutrons épithermiques présents.  2, record 35, French, - facteur%20r%20de%20Westcott

Record number: 35, Textual support number: 1 OBS

facteur r de Westcott : terme normalisé par l'ISO.  3, record 35, French, - facteur%20r%20de%20Westcott

Record number: 35, Textual support number: 2 OBS

facteur r de Westcott : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  3, record 35, French, - facteur%20r%20de%20Westcott

Record 35,  Textual support,  Spanish

Record 36,  Textual support,  English

Record number: 36, Textual support number: 1 DEF

An average of the difference in energy between two consecutive resonance levels with the same spin and excited by neutrons of equal angular momentum. It is a function of the energy of excitation of the compound nucleus.  2, record 36, English, - mean%20level%20spacing

Record number: 36, Textual support number: 1 OBS

mean level spacing: term standardized by ISO.  3, record 36, English, - mean%20level%20spacing

Record number: 36, Textual support number: 2 OBS

mean level spacing: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  3, record 36, English, - mean%20level%20spacing

Record 36,  Textual support,  French

Record number: 36, Textual support number: 1 DEF

Moyenne de la différence d'énergie entre deux niveaux de résonance consécutifs ayant le même spin et excités par des neutrons de même moment angulaire. Il est fonction de l'énergie d'excitation du noyau composé.  2, record 36, French, - espacement%20moyen%20des%20niveaux

Record number: 36, Textual support number: 1 OBS

espacement moyen des niveaux : terme normalisé par l'ISO.  3, record 36, French, - espacement%20moyen%20des%20niveaux

Record number: 36, Textual support number: 2 OBS

espacement moyen des niveaux : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  3, record 36, French, - espacement%20moyen%20des%20niveaux

Record 36,  Textual support,  Spanish

Record 37,  Textual support,  English

Record number: 37, Textual support number: 1 DEF

A device for measuring fast-neutron energy spectra by observing the energy distribution of the recoiling protons resulting from elastic scattering of the neutrons in a hydrogenous medium.  4, record 37, English, - proton%20recoil%20spectrometer

Record number: 37, Textual support number: 1 OBS

proton recoil spectrometer: term and definition standardized by ISO in 1997.  5, record 37, English, - proton%20recoil%20spectrometer

Record number: 37, Textual support number: 2 OBS

proton recoil spectrometer: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  5, record 37, English, - proton%20recoil%20spectrometer

Record 37,  Textual support,  French

Record number: 37, Textual support number: 1 DEF

Dispositif [servant à] mesurer les spectres d'énergie des neutrons rapides, en observant la distribution énergétique des protons de recul issus de collisions élastiques des neutrons dans un milieu hydrogéné.  2, record 37, French, - spectrom%C3%A8tre%20%C3%A0%20protons%20de%20recul

Record number: 37, Textual support number: 1 OBS

spectromètre à protons de recul : terme normalisé par l'ISO en 1997.  3, record 37, French, - spectrom%C3%A8tre%20%C3%A0%20protons%20de%20recul

Record number: 37, Textual support number: 2 OBS

spectromètre à protons de recul : terme extrait du «Glossaire de l’énergie nucléaire» et reproduit avec l’autorisation de l’Organisation de coopération et de développement économiques.  3, record 37, French, - spectrom%C3%A8tre%20%C3%A0%20protons%20de%20recul

Record 37,  Textual support,  Spanish

Record 38,  Textual support,  English

Record number: 38, Textual support number: 1 DEF

A control board made of materials that capture neutrons at a very high rate.  3, record 38, English, - black%20rod

Record number: 38, Textual support number: 1 OBS

black control rod: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  4, record 38, English, - black%20rod

Record 38,  Textual support,  French

Record number: 38, Textual support number: 1 DEF

Barre de commande constituée de matériaux absorbant les neutrons, et qui contribuent au contrôle de la criticité du réacteur nucléaire.  2, record 38, French, - barre%20noire

Record number: 38, Textual support number: 1 OBS

barre de commande : Barre ou ensemble de tiges solidaires mobiles, contenant une matière absorbant les neutrons et qui, suivant sa position dans le coeur d'un réacteur nucléaire, influe sur sa réactivité.  3, record 38, French, - barre%20noire

Record 38,  Textual support,  Spanish

Record 39,  Textual support,  English

Record number: 39, Textual support number: 1 DEF

As applied to nuclear kinteics, a short and intense emission of neutrons which is due, most of the time, to a fast divergence in a neutron multiplying media.  3, record 39, English, - neutron%20burst

Record number: 39, Textual support number: 1 OBS

neutron burst: term extracted from the “Glossaire de l’énergie nucléaire” and reproduced with permission of the Organisation for Economic Co-operation and Development.  3, record 39, English, - neutron%20burst

Record 39,  Textual support,  French

Record number: 39, Textual support number: 1 DEF

En cinétique des réacteurs, émission intense et brève de neutrons due, le plus souvent, à une divergence rapide d'un milieu multiplicateur de neutrons.  2, record 39, French, - bouff%C3%A9e%20de%20neutrons

Record 39,  Textual support,  Spanish

Record 40,  Textual support,  English

Record number: 40, Textual support number: 1 DEF

Radioactivity induced in the ground or an object as a result of direct irradiation by neutrons.  2, record 40, English, - neutron%20induced%20activity

Record number: 40, Textual support number: 1 OBS

neutron induced activity: term and definition standardized by NATO.  3, record 40, English, - neutron%20induced%20activity

Record 40,  Textual support,  French

Record number: 40, Textual support number: 1 DEF

Radioactivité induite dans le sol ou dans un objet du fait d'une irradiation directe par neutrons.  2, record 40, French, - activit%C3%A9%20induite%20par%20les%20neutrons

Record number: 40, Textual support number: 1 OBS

activité induite par les neutrons : terme et définition normalisés par l'OTAN.  3, record 40, French, - activit%C3%A9%20induite%20par%20les%20neutrons

Record 40,  Textual support,  Spanish

Record number: 40, Textual support number: 1 DEF

Radiactividad inducida en el suelo, o en un objeto, como consecuencia de la irradiación directa de los neutrones.  1, record 40, Spanish, - radiactividad%20inducida%20por%20los%20neutrones

Record 41,  Textual support,  English

Record number: 41, Textual support number: 1 DEF

Radiation produced as a result of exposure to radioactive materials, particularly the capture of neutrons.  2, record 41, English, - induced%20radiation

Record number: 41, Textual support number: 1 OBS

induced radiation: term and definition standardized by NATO.  3, record 41, English, - induced%20radiation

Record 41,  Textual support,  French

Record number: 41, Textual support number: 1 DEF

Radiation résultant de l'exposition à des matériaux radioactifs, en particulier la capture des neutrons.  2, record 41, French, - radiation%20induite

Record number: 41, Textual support number: 1 OBS

radiation induite : terme et définition normalisés par l'OTAN.  3, record 41, French, - radiation%20induite

Record 41,  Textual support,  Spanish

Record number: 41, Textual support number: 1 DEF

Radiación producida como resultado de una explosión de materiales radiactivos, en particular la captura de neutrones.  1, record 41, Spanish, - radiaci%C3%B3n%20inducida

Record 42,  Textual support,  English

Record number: 42, Textual support number: 1 DEF

Material which in itself is not fissile (fissionable) but which, in a reactor, may be transformed into fissile (fissionable) material through a nuclear transformation.  2, record 42, English, - fertile%20material

Record number: 42, Textual support number: 2 DEF

Material containing one or more fertile nuclides. [Definition standardized by ISO.]  3, record 42, English, - fertile%20material

Record number: 42, Textual support number: 3 DEF

Isotopes capable of being readily transformed, directly or indirectly, into fissionable material by the absorption of neutrons, particularly uranium-238 and thorium-232...  4, record 42, English, - fertile%20material

Record number: 42, Textual support number: 1 OBS

Sometimes called "source material" or "breeder material."  4, record 42, English, - fertile%20material

Record 42,  Textual support,  French

Record number: 42, Textual support number: 1 DEF

Matière contenant un ou plusieurs nucléides fertiles. [Définition normalisée par l'ISO.]  2, record 42, French, - mati%C3%A8re%20fertile

Record number: 42, Textual support number: 1 CONT

Un nucléide est considéré comme fertile s'il est capable d'être transformé directement ou indirectement en nucléide fissile, par capture de neutrons. Le thorium 232 et l'uranium 238 sont des matières fertiles.  3, record 42, French, - mati%C3%A8re%20fertile

Record 42,  Textual support,  Spanish

Record number: 42, Textual support number: 1 DEF

En tecnología nuclear, sustancia que no es capaz de mantener una reacción en cadena, pero que puede convertirse en materia fisionable en un reactor nuclear.  2, record 42, Spanish, - material%20f%C3%A9rtil

Record number: 42, Textual support number: 1 CONT

Un nucleido se considera fértil si es capaz de ser transformado, directa o indirectamente, en nucleido fisible, mediante la captura de neutrones. El torio 232 y el uranio 238 son materiales fértiles.  3, record 42, Spanish, - material%20f%C3%A9rtil

Record 43,  Textual support,  English

Record number: 43, Textual support number: 1 DEF

... an energetic particle designed to measure a broad spectrum of energetic particle radiation.  1, record 43, English, - radiation%20assessment%20detector

Record number: 43, Textual support number: 1 OBS

It will make the first-ever direct radiation measurements on the surface of Mars, detecting galactic cosmic rays, solar energetic particles, secondary neutrons, and other secondary particles created both in the atmosphere and in the Martian regolith.  1, record 43, English, - radiation%20assessment%20detector

Record 43,  Textual support,  French

Record number: 43, Textual support number: 1 CONT

Quant aux informations recueillies sur les radiations de surface par le détecteur de radiations (RAD), elles constitueront les données critiques pour les modèles de transformation des matériaux organiques. Ces modèles seront également contraints par les analyses cristallographiques et minéralogiques des roches par diffraction est fluorescence X que réalisera l’instrument Chemin.  1, record 43, French, - d%C3%A9tecteur%20de%20radiations

Record 43,  Textual support,  Spanish

Record 44,  Textual support,  English

Record number: 44, Textual support number: 1 CONT

According to charge symmetry protons and neutrons should have the same properties.  2, record 44, English, - charge%20symmetry

Record 44,  Textual support,  French

Record number: 44, Textual support number: 1 CONT

Le principe de symétrie de charge, selon lequel les interactions fortes entre deux protons sont sensiblement égales à celles entre deux neutrons [...]  2, record 44, French, - sym%C3%A9trie%20de%20charge

Record 44,  Textual support,  Spanish

Record 45,  Textual support,  English

Record number: 45, Textual support number: 1 DEF

The estimated fluence of neutrons of a given energy distribution beyond which the sensitive material of a neutron detector will be consumed to such an extent that it no longer serves its purpose.  1, record 45, English, - neutron%20detector%20burnup%20life

Record number: 45, Textual support number: 1 OBS

neutron detector burnup life: term and definition standardized by ISO.  2, record 45, English, - neutron%20detector%20burnup%20life

Record 45,  Textual support,  French

Record number: 45, Textual support number: 1 DEF

Fluence estimée de neutrons d'une distribution énergétique donnée au-delà de laquelle la matière sensible d'un détecteur de neutrons est consommée dans une mesure telle qu'il ne remplit plus sa fonction.  1, record 45, French, - fluence%20de%20combustion%20d%27un%20d%C3%A9tecteur%20de%20neutrons

Record number: 45, Textual support number: 1 OBS

fluence de combustion d'un détecteur de neutrons : terme et définition normalisés par l'ISO.  2, record 45, French, - fluence%20de%20combustion%20d%27un%20d%C3%A9tecteur%20de%20neutrons

Record 45,  Textual support,  Spanish

Record 46,  Textual support,  English

Record number: 46, Textual support number: 1 DEF

A model for the calculation of effective thermal cross-sections based on the assumption of a neutron flux density per unit energy interval that is Maxwellian for thermal neutrons and varies inversely with energy for epithermal neutrons.  1, record 46, English, - Westcott%20model

Record number: 46, Textual support number: 1 OBS

Westcott model: term and definition standardized by ISO.  2, record 46, English, - Westcott%20model

Record 46,  Textual support,  French

Record number: 46, Textual support number: 1 DEF

Modèle utilisé pour le calcul de la section efficace thermique effective, dans lequel le débit de fluence de neutrons par intervalle unitaire d'énergie est maxwellien pour les neutrons thermiques et inversement proportionnel à l'énergie pour les neutrons épithermiques.  1, record 46, French, - mod%C3%A8le%20de%20Westcott

Record number: 46, Textual support number: 1 OBS

modèle de Westcott : terme et définition normalisés par l'ISO.  2, record 46, French, - mod%C3%A8le%20de%20Westcott

Record 46,  Textual support,  Spanish

Record 47,  Textual support,  English

Record number: 47, Textual support number: 1 DEF

A device placed in a flux of slow neutrons to produce fission neutrons and so increase the proportion of fast neutrons.  1, record 47, English, - neutron%20converter

Record number: 47, Textual support number: 1 OBS

neutron converter: term and definition standardized by ISO.  2, record 47, English, - neutron%20converter

Record 47,  Textual support,  French

Record number: 47, Textual support number: 1 DEF

Dispositif placé dans un flux de neutrons lents pour produire des neutrons de fission et augmenter ainsi la proportion des neutrons rapides.  1, record 47, French, - convertisseur%20de%20neutrons

Record number: 47, Textual support number: 1 OBS

convertisseur de neutrons : terme et définition normalisés par l'ISO.  2, record 47, French, - convertisseur%20de%20neutrons

Record 47,  Textual support,  Spanish

Record 49,  Textual support,  English

Record number: 49, Textual support number: 1 CONT

Self-powered in-core flux detectors.... two types of in-core detectors are used in the [CANDU nuclear] reactor. Platinum detectors are fast acting and sensitive to both neutrons and gamma rays.  2, record 49, English, - platinum%20flux%20detector

Record 49,  Textual support,  French

Record number: 49, Textual support number: 1 CONT

Les détecteurs au platine sont rapides et sensibles aux neutrons ainsi qu'aux rayons gamma.  2, record 49, French, - d%C3%A9tecteur%20de%20flux%20au%20platine

Record 49,  Textual support,  Spanish

Record 50,  Textual support,  English

Record number: 50, Textual support number: 1 DEF

virgin neutrons :Neutrons from any source, before the make a collision.  1, record 50, English, - virgin%20neutron

Record number: 50, Textual support number: 1 OBS

virgin neutron : The plural form of this term(virgin neutrons) and the plural definition have been standardized by ISO.  2, record 50, English, - virgin%20neutron

Record 50,  Textual support,  French

Record number: 50, Textual support number: 1 DEF

neutrons vierges : Neutrons provenant d'une source quelconque avant leur première collision.  1, record 50, French, - neutron%20vierge

Record number: 50, Textual support number: 1 OBS

neutron vierge : Le terme au pluriel (neutrons vierges) et la définition au pluriel ont été normalisés par l'ISO.  2, record 50, French, - neutron%20vierge

Record 50,  Textual support,  Spanish

Record 51,  Textual support,  English

Record number: 51, Textual support number: 1 DEF

Fulfilling the condition that a nuclear chain reacting medium is critical utilizing prompt neutrons only.  1, record 51, English, - prompt%20critical

Record number: 51, Textual support number: 1 OBS

prompt critical: term and defintion standardized by ISO.  2, record 51, English, - prompt%20critical

Record 51,  Textual support,  French

Record number: 51, 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 51, French, - critique%20instantan%C3%A9e

Record number: 51, Textual support number: 1 OBS

critique instantanée : terme et définition normalisés par l'ISO.  2, record 51, French, - critique%20instantan%C3%A9e

Record 51,  Textual support,  Spanish

Record 52,  Textual support,  English

Record number: 52, Textual support number: 1 DEF

Establishment of thermal equilibrium between neutrons and their surroundings.  1, record 52, English, - thermalization

Record number: 52, Textual support number: 1 OBS

thermalization: term and definition standardized by ISO.  2, record 52, English, - thermalization

Record 52,  Textual support,  French

Record number: 52, Textual support number: 1 DEF

Établissement de l'équilibre thermique entre des neutrons et le milieu ambiant.  1, record 52, French, - thermalisation

Record number: 52, Textual support number: 1 OBS

thermalisation : terme et définition normalisés par l'ISO.  2, record 52, French, - thermalisation

Record 52,  Textual support,  Spanish

Record 53,  Textual support,  English

Record number: 53, Textual support number: 1 DEF

A theory for the calculation of neutron attenuation in certain radiation shield materials treating the attenuation process in two steps : initially, a source of first-collision neutrons is determined by means of removal cross-sections; then, the resulting neutron flux density is calculated by diffusion theory.  1, record 53, English, - removal%2Ddiffusion%20theory

Record number: 53, Textual support number: 1 OBS

removal-diffusion theory: term and definition standardized by ISO.  2, record 53, English, - removal%2Ddiffusion%20theory

Record 53,  Textual support,  French

Record number: 53, Textual support number: 1 DEF

Théorie pour le calcul de l'atténuation neutronique dans certains matériaux écrans traitant le processus d'atténuation en deux étapes : d'abord une source de neutrons de première collision est déterminée au moyen des sections efficaces de déplacement, ensuite le débit de fluence neutronique résultant est calculé par la théorie de la diffusion.  1, record 53, French, - th%C3%A9orie%20de%20d%C3%A9placement%2Ddiffusion

Record number: 53, Textual support number: 1 OBS

théorie de déplacement-diffusion : terme et définition normalisés par l'ISO.  2, record 53, French, - th%C3%A9orie%20de%20d%C3%A9placement%2Ddiffusion

Record 53,  Textual support,  Spanish

Record 54,  Textual support,  English

Record number: 54, Textual support number: 1 DEF

The average number of neutrons with the velocity and position of type B which must be added to a critical system to keep the chain reaction rate constant after removal of a neutron with the velocity and position of type A.  1, record 54, English, - relative%20importance

Record number: 54, Textual support number: 1 OBS

relative importance: term and definition standardized by ISO.  2, record 54, English, - relative%20importance

Record 54,  Textual support,  French

Record number: 54, Textual support number: 1 DEF

Nombre moyen de neutrons ayant la vitesse et la position de B qui doivent être ajoutés à un système critique pour maintenir constant le taux de réaction en chaîne après suppression d'un neutron ayant la position et la vitesse de A.  1, record 54, French, - importance%20relative

Record number: 54, Textual support number: 1 OBS

importance relative : terme et définition normalisés par l'ISO.  2, record 54, French, - importance%20relative

Record 54,  Textual support,  Spanish