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GAS LEAK DETECTION [7 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2014-08-22

English

Subject field(s)
  • Chemical Elements and Compounds
  • Pollutants
Universal entry(ies)
N2O
formula, see observation
10024-97-2
CAS number
DEF

A chemical compound which appears under the form of a noncombustible, asphyxiating, colourless, sweet-tasting gas, is soluble in alcohol, ether, and concentrated sulfuric acid, is slightly soluble in water, is derived by thermal decomposition of ammonium nitrate, controlled reduction of nitriles or nitrates, supports combustion, can form explosive mixture with air, narcotic in high concentration, and is used as an anesthetic in dentistry and surgery, a propellant gas in food aerosols, and for leak detection.

OBS

Nitrous oxide is destroyed by ultraviolet light and has a 150-year residence time in the atmosphere. Concentrations of nitrous oxide are increasing presently at about 0.3%, or 0.7 ppb [part per billion], per year. A 50% increase of the present concentration would raise the mean global temperature between 0.2 and 0.5 C.

OBS

dinitrogen oxide: form recommended by the IUPAC (International Union of Pure and Applied Chemistry) for the systematic name corresponding to the CAS number indicated on the present record.

OBS

Chemical formula: N2O

OBS

nitrous oxide: term standardized by Environment Canada and the Translation Bureau for use in the National Inventory Report.

French

Domaine(s)
  • Éléments et composés chimiques
  • Agents de pollution
Entrée(s) universelle(s)
N2O
formula, see observation
10024-97-2
CAS number
DEF

Gaz asphyxiant incolore, soluble dans l'alcool, peu soluble dans l'eau, utilisé notamment comme propulseur de denrées en aérosol (matières grasses, produits laitiers, etc.).

OBS

Cet oxyde d'azote est [...] un des principaux gaz à effet de serre.

OBS

oxyde de diazote : forme recommandée par l'UICPA (Union internationale de chimie pure et appliquée) pour le nom systématique correspondant au numéro CAS indiqué sur la présente fiche.

OBS

Formule chimique : N2O

OBS

oxyde nitreux : terme normalisé par Environnement Canada et le Bureau de la traduction dans le cadre du Rapport d'inventaire national.

Spanish

Campo(s) temático(s)
  • Elementos y compuestos químicos
  • Agentes contaminantes
Entrada(s) universal(es)
N2O
formula, see observation
10024-97-2
CAS number
OBS

Gas incoloro no inflamable, soluble en alcohol y ácido sulfúrico concentrado. Ligeramente soluble en agua. Moderado riesgo de incendio.

OBS

Fórmula química : N2O

Save record 1

Record 2 2012-02-13

English

Subject field(s)
  • Optics
  • Analytical Chemistry
DEF

The section of the mass spectrometer in which the beam of ions emerging from the ion source is separated into a series of beams, according to the mass-to-charge ratios.

CONT

Mass spectrometers, which operate under high vacuum, consist of four basic parts: a handling system ...; an ionization chamber ...; an analyzer, in which the particles in the beam are separated according to mass; and a detector ...

CONT

Mass analyzers are systems designed to identify and measure materials according to their molecular weights. The technique has been adapted for many other applications ranging from physics research and the identification of complex molecular structure to assuring the integrity of the fuel systems on the space shuttle and routine helium leak detection. While the uses of mass analyzers in the microelectronics industry include some exotic applications, such as SIMS, the greatest number of systems are used for various types of gas analysis. Applications for mass analyzers include process monitoring, process engineering and control in such areas as evaporation, MBE, sputter etch and deposition, plasma etch and deposition, ion, implantation, LPCVD, CVD, and diffusion furnaces. Another important application is high purity gas certification and electronic gas mixture verification.

Key term(s)
  • analyser
  • mass analyzer

French

Domaine(s)
  • Optique
  • Chimie analytique
CONT

Un spectromètre de masse comprend quatre éléments essentiels : 1. un système de prélèvement et de transport de l'échantillon vers la source d'ions; 2. une source d'ions [...] 3. un analyseur qui, au moyen de combinaisons variées de champs électriques et magnétiques, sépare les espèces ioniques en faisceaux distincts qu'il filtre, selon le rapport m/e de leur masse à leur charge; 4. un détecteur [...]

Spanish

Campo(s) temático(s)
  • Óptica
  • Química analítica
Save record 2

Record 3 2010-03-01

English

Subject field(s)
  • Fluid Mechanics and Hydraulics (Physics)
  • Nuclear Fission Reactors
CONT

Method and device for detecting a leak from a fuel element of an assembly for a nuclear reactor. The detection of the defective fuel assemblies may be effected under water in the pool, by acoustic, ultrasonic or eddy current methods of measurement. It is also possible to use cells called sipping test containers in which the release of radioactive products by the fuel assembly is promoted, these radioactive products being subsequently carried away by the water or a gas into a unit enabling them to be detected.

French

Domaine(s)
  • Mécanique des fluides et hydraulique (Physique)
  • Réacteurs nucléaires de fission
CONT

Dans le cas d'un combustible nucléaire, le ressuage d'un gaz (généralement un produit de fission gazeux) permet de détecter des assemblages contenant des crayons non étanches. Cette opération est effectuée dans une cellule spéciale (cellule de ressuage) disposée soit dans la piscine du réacteur (dans le cas des Rep [réacteurs à eau pressurisée]), soit à l'entrée de l'usine du traitement des combustibles usés.

Spanish

Save record 3

Record 4 2006-10-26

English

Subject field(s)
  • Chemistry
DEF

An inert light gas, He, which is odorless, colorless, and not flammable.

CONT

Helium is extracted from natural gas sources in the Texas and Oklahoma ... and Southwest Kansas ... The element is believed to be trapped in the natural gas pockets after disintegration from uranium and thorium.

CONT

... uses for helium[ :] filling party balloons as it is a much safer gas(non-flammable) ;widely used as an inert gas shield for arc welding; high speed push gas inside air to air missiles for guidance corrections; protective gas in growing silicon and germanium crystals, and in titanium and zirconium production; cooling medium for nuclear reactors, helium won’t become radioactive; a mixture of 80% helium and 20% oxygen is used as an artificial atmosphere for divers and others working under pressure; cryogenics and superconductivity; rare document preservation... Independence) ;as a gas for supersonic wind tunnels; pressurizing agent for liquid fuel rockets(inert so won’t react) ;leak detection agent for extremely small leaks; nuclear detonation simulations(using conventional explosives) ;isotopic dating by helium ratios(seawater, ocean beds, etc) ;helium/neon lasers; helium cardio-pulmonary resuscitation pump(heart surgery) ;helium filled border patrol "AEROSTAT" monitoring blimps.

OBS

Helium has an atomic number of 2, an atomic weight of 4, density of 0.1785 kg/m³ at STP. Helium can be liquefied at 4.2 K (-269°C).

French

Domaine(s)
  • Chimie
DEF

Gaz rare le plus léger.

OBS

(Élément de symbole He). Numéro atomique : 2. Masse atomique : 4,0026. Température de fusion : -269,7 °C. Température d'ébullition : -268,934 °C. Masse volumique : 0,126 g/cm³. État d'oxydation : 0.

OBS

Gaz rare utilisé en mélange pour la plongée profonde.

Spanish

Campo(s) temático(s)
  • Química
Save record 4

Record 5 - external organization data 2005-10-25

English

Subject field(s)
  • Nuclear Fission Reactors
  • Nuclear Power Stations
  • Compartment - Canadian Nuclear Safety Commission
CONT

Unplanned Outages. Include the origin and/or the cause of these outages, such as :(i) process problems, for example, tower instabilities;(ii) mechanical failure of static components, for example, the development of a gas leak or the detection of corrosion approaching allowable limits or codes or of a component crack in the hydrogen sulphide(H2S) pressure envelope...

French

Domaine(s)
  • Réacteurs nucléaires de fission
  • Centrales nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

La distillation fractionnée de l'eau permet la concentration du deutérium; l'eau lourde, moins volatile, s'accumule dans le bouilleur. Le facteur de séparation [...] est très faible [...] Cela conduit à des tours de distillation très importantes.

Spanish

Save record 5

Record 6 - external organization data 1998-01-12

English

Subject field(s)
  • Nuclear Science and Technology
  • Nuclear Fission Reactors
  • Nuclear Power Stations
  • Compartment - Canadian Nuclear Safety Commission
CONT

Unplanned Outages. Include the origin and/or the cause of these outages, such as :(i) process problems, for example, tower instabilities;(ii) mechanical failure of static components, for example, the development of a gas leak or the detection of corrosion approaching allowable limits or codes or of a component crack in the hydrogen sulphide(H2S) pressure envelope...

French

Domaine(s)
  • Sciences et techniques nucléaires
  • Réacteurs nucléaires de fission
  • Centrales nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Arrêts imprévus. Sous le présent titre, il faudrait indiquer l'origine ou la cause de l'arrêt imprévu, tels : (i) des problèmes reliés au traitement, comme des instabilités dans une tour d'échange, (ii) la défaillance mécanique de composants fixes, par exemple, le développement d'une fuite de gaz, la découverte de corrosion proche des limites ou normes admissibles, ou la présence d'une fissure dans un composant de l'enveloppe sous pression de l'hydrogène sulfuré (H2S) [...]

Spanish

Save record 6

Record 7 - external organization data 1994-12-14

English

Subject field(s)
  • Nuclear Fission Reactors
  • Compartment - Canadian Nuclear Safety Commission
CONT

Unplanned Outages. Include the origin and/or the cause of these outages, such as :(i) process problems, for example, tower instabilities;(ii) mechanical failure of static components, for example, the development of a gas leak or the detection of corrosion approaching allowable limits or codes or of a component crack in the hydrogen sulphide(H2S) pressure envelope....

French

Domaine(s)
  • Réacteurs nucléaires de fission
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Arrêts imprévus. Sous le présent titre, il faudrait indiquer l'origine ou la cause de l'arrêt imprévu, tels : (i) des problèmes reliés au traitement, comme des instabilités dans une tour d'échange, (ii) la défaillance mécanique de composants fixes, par exemple, le développement d'une fuite de gaz, la découverte de corrosion proche des limites ou normes admissibles, ou la présence d'une fissure dans un composant de l'enveloppe sous pression de l'hydrogène sulfuré (H2S) [...]

Spanish

Save record 7

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