TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

The threshold for the instantaneous self-protection release should therefore be set very low, which restricts discrimination with downstream equipment to low values, unless more sophisticated trip criteria are used.  2, record 1, English, - instantaneous%20release

Record number: 1, Textual support number: 1 OBS

instantaneous release : term standardized by the International Electrotechnical Commission(IEC).  1, record 1, English, - instantaneous%20release

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 OBS

déclencheur instantané : terme normalisé par la Commission électrotechnique internationale (CEI).  2, record 1, French, - d%C3%A9clencheur%20instantan%C3%A9

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Line in space tracing the successive positions of a moving particle of air.  2, record 2, English, - trajectory

Record number: 2, Textual support number: 1 CONT

An instantaneous pollution release from a single stack will form a "puff" of pollution... The path of the centre of such a puff is called trajectory.  3, record 2, English, - trajectory

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Ligne dans l'espace représentant les positions successives d'une particule d'air en mouvement.  2, record 2, French, - trajectoire

Record 2,  Textual support,  Spanish

Record number: 2, Textual support number: 1 DEF

Curva descrita por las posiciones sucesivas de una partícula de aire en movimiento.  1, record 2, Spanish, - trayectoria

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Exposure made with a device fitted to some shutters whereby an initial pressure on the release opens the shutter and a second pressure closes it.  1, record 3, English, - time%20exposure%20T

Record number: 3, Textual support number: 1 CONT

[A "time exposure" is] An exposure of greater duration than an instantaneous exposure; usually regarded as being longer than a second. For some exposures the shutter may be set at "B"(bulb) and remains open only as long as pressure is maintained on the release. For longer exposures the shutter may be set at "T"(time) ;an initial pressure on the release opens the shutter and a second pressure closes it.  2, record 3, English, - time%20exposure%20T

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 CONT

La gamme des vitesses des obturateurs à rideaux, s'étend généralement entre 1 seconde jusqu'à 1/1000 seconde (...) Ils ont tous la pose B et quelquefois la pose T à deux temps, bien peu fonctionnelle.  1, record 3, French, - pose%20T

Record number: 3, Textual support number: 2 CONT

(...) les divers obturateurs modernes qui viennent d'être étudiés permettent de faire des poses longues (ou en 1 temps) et des poses très longues (dites en 2 temps).  2, record 3, French, - pose%20T

Record number: 3, Textual support number: 3 CONT

Deux lettres sont également inscrites sur cette bague. Il s'agit de B (temps de pose retenu) et de T (temps de pose très long).  3, record 3, French, - pose%20T

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

To estimate the vapour concentrations downwind of an accident site for determination of the flammability or toxicity hazard zone, the atmospheric dispersion of a contaminant vapour is modelled as a "puff" or "plume" according to the decision tree given in Figure 3. A gas leak form a tank is considered a semi-continuous point source, modelling as a plume, whereas the release of a large amount of gas over a very short time period of the order of seconds to minutes is considered an instantaneous point source modelled as a puff.  1, record 4, English, - flammability%20hazard%20zone

Record 4,  Textual support,  French

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 OBS

In an accidental situation,... the mode of release depends on the chemical and how it is stored and on the nature of the rupture which may be highly irregular and can occur anywhere on the containing vessel.... A gas leak from a tank would act as a "point" source of vapour emissions, whereas as a liquid leak spreading on a land or water surface and evaporating would act as an "area" source. Both of these types of sources would be of a "semi-continuous" nature, whereas a catastrophic failure would result in an "instantaneous" cloud(or "puff") source.... in this latter case, a large amount of material is released in a short time....  2, record 5, English, - instantaneous%20point%20source

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 OBS

Dans les cahiers de la collection "Enviroguide", publiés par Environnement Canada, se rapporte à la perforation d'une citerne par suite d'un accident, donnant lieu sur le coup à une très forte émission de vapeurs qualifiée de "bouffée" (voir cette fiche).  1, record 5, French, - source%20ponctuelle%20%C3%A0%20%C3%A9mission%20instantan%C3%A9e

Record 5,  Textual support,  Spanish

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 CONT

This type of motion causes a smoke plume from a continuous point source to meander ....  2, record 6, English, - continuous%20point%20source

Record number: 6, Textual support number: 1 OBS

... accidental situation.... The mode of release depends on the chemical and how it is stored and on the nature of the rupture... on the containing vessel.... A gas leak from a tank would act as a "point" source of vapour emissions, whereas as a liquid leak spreading on a land or water surface and evaporating would act as an "area" source. Both of these types of sources would be of a "semi-continuous" nature, whereas a catastrophic failure... would result in an "instantaneous" cloud(or "puff") source.... [in] the latter case,... a large amount of material is released in a short time.  3, record 6, English, - continuous%20point%20source

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 OBS

Modélisation de la diffusion atmosphérique des polluants.  1, record 6, French, - source%20ponctuelle%20%C3%A0%20%C3%A9mission%20continue

Record 6,  Textual support,  Spanish

Record 7,  Textual support,  English

Record number: 7, Textual support number: 1 OBS

An exposure of greater duration than an instantaneous exposure; usually regarded as being longer than a second. For some exposures the shutter may be set at "B"(bulb) and remains open only as long as pressure is maintained on the release. For longer exposures the shutter may be set at "T"(time) ;an initial pressure on the release opens the shutter and a second pressure closes it.  1, record 7, English, - time%20exposure

Record 7,  Textual support,  French

Record number: 7, Textual support number: 1 OBS

Exposition d'une durée généralement supérieure à la seconde. Il y a deux types de poses: la pose un temps (B) dans laquelle l'obturateur reste ouvert tant que l'opérateur n'a pas relâché le déclencheur; la pose deux temps (T) dans laquelle l'obturateur reste ouvert tant que l'opérateur n'a pas appuyé une seconde fois sur le déclencheur.  1, record 7, French, - pose

Record 7,  Textual support,  Spanish