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CRUD [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2010-02-23

English

Subject field(s)
  • Chemical Elements and Compounds
  • Geochemistry
  • Medication
Universal entry(ies)
Mg(HCO3)2
formula, see observation
CONT

... Calcium and Magnesium react with other chemicals in the water. The warm water acts as a catalyst and increases the number of reactions depending on the concentration of calcium and magnesium. The reaction which takes place is the dissociation of calcium hydrocarbonate, formula : Ca(HC03) and magnesium hydrocarbonate, formula : Mg(HC0[ susbcript 3]) 2. Both of these are soluble solids, which means they can dissolve when put in water. When these two soluble salts dissociate, they form carbon dioxide(a gas), which is released from the water, and calcium and magnesium carbonate. These two compounds are not soluble and are therefore taken out of solution. And it is these substances that cause the filmy, fuzzy crud on the glass of your aquarium when the water evaporates.

CONT

San Marcos River Basin. The lithology and the water flow conditions are the major factors that determine the chemical composition of the waters and the hydrogeochemical patterns. We can distinguish the following water types: sodium calcium hydrocarbonate for waters from the sedimentary-effusive rocks, magnesium hydrocarbonate for the waters which originate in the ultrabasic massif, and calcium hydrocarbonate for that waters which flow in the karst areas (at the source, caves, exsurgences and springs from the saturation zone).

OBS

magnesium hydrocarbonate: traditional name, to be avoided.

OBS

Chemical formula: Mg(HCO3)2

French

Domaine(s)
  • Éléments et composés chimiques
  • Géochimie
  • Médicaments
Entrée(s) universelle(s)
Mg(HCO3)2
formula, see observation
CONT

(Matériel pour le grimpeur) sac à pof : petit sac dans lequel le grimpeur met du pof (poudre de résine ) ou de la magnésie (hydrocarbonate de magnésium) afin d'absorber la transpiration des mains et d'éviter que celle-ci le fasse glisser.

OBS

hydrocarbonate de magnésium : nom traditionnel, à éviter.

OBS

Formule chimique : Mg(HCO3)2

Spanish

Save record 1

Record 2 2009-09-18

English

Subject field(s)
  • Atomic Physics
CONT

Core physics calculations of the flux depression caused by incorporation of boron into the fuel crud showed a linear change in flux with boron loading.

French

Domaine(s)
  • Physique atomique
CONT

[Cette] figure montre bien les dépressions de flux vues par les sondes mobiles : on choisit arbitrairement une grille pour laquelle la dépression de flux est nette, vers le centre du cour par exemple la cinquième (en partant du bas).

Spanish

Save record 2

Record 3 - external organization data 2006-03-16

English

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

The purification system has two tasks. First, it must remove insoluble and soluble corrosion products and other impurities from the moderator water. Secondly it must remove unwanted neutron absorbing chemicals (called poisons), used for reactor regulation.

CONT

If this circulating crud is not removed from the HTS [heat transport system], subsequent neutron activation and re-deposition will create radiological problems in the HTS(increased man-rem). An increased purification flow will remove much or all of these products. But, the removal of these materials in the purification circuit will result in high radiation fields around the filters, strainers and IX columns.

French

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

Le circuit d'épuration joue deux rôles. D'abord, il doit éliminer les produits de corrosion non solubles et solubles ainsi que d'autres impuretés provenant du modérateur. Deuxièmement, il doit éliminer les produits chimiques absorbeurs de neutron non souhaitables (appelés poisons), utilisés pour la régulation du réacteur.

Spanish

Save record 3

Record 4 2004-02-12

English

Subject field(s)
  • Glaciology
  • Skiing and Snowboarding
  • Polar Geography
CONT

Fresh powder snow soon becomes "skied out", or "tracked out". This is sometimes known as "crud"(although this term is also used for breakable crust)... The problem is that the fresh snow is now packed down in some areas, and piled up in others. So the amount of resistance that your skis encounter is always changing. You need to constantly look ahead and anticipate this. When you’re about to go through a deep pile, push your feet forward slightly. For the firmer sections, stand more in the middle of the ski. Rather than persisting with the short, bouncy turns of true powder, you will be better served in crud by longer, rounder, carved arcs.

PHR

to ride crud

French

Domaine(s)
  • Glaciologie
  • Ski et surf des neiges
  • Géographie du froid
CONT

La neige trafollée est une neige qui a été tracée les jours précédents par des skieurs. Leurs traces ont parfois durci et rendent alors la surface irrégulière et désagréable à skier.

Spanish

Save record 4

Record 5 1992-03-30

English

Subject field(s)
  • Deterioration of Metals
  • Nuclear Fission Reactors
DEF

A deposit or incrustation of impurity or unwanted foreign substance.

OBS

Applies to the cooling circuits of the CANDU nuclear reactors.

OBS

"Crud" has been standardized by ISO.

French

Domaine(s)
  • Altération des métaux
  • Réacteurs nucléaires de fission
DEF

Dépôt ou incrustation d'impuretés ou de substances étrangères non désirables.

DEF

Produits de corrosion, dans les réacteurs nucléaires, qui peuvent donner naissance à des dépôts sur le combustible et autres surfaces exposées au fluide de refroidissement.

OBS

"impuretés" a été normalisé par l'ISO.

Spanish

Save record 5

Record 6 1980-03-25

English

Subject field(s)
  • Deterioration of Metals
DEF

A sudden loosening of crud deposits and build-up at points within the primary heat transport system following a chemical, hydraulic or temperature transient.

OBS

Applies to the CANDU nuclear reactors.

French

Domaine(s)
  • Altération des métaux
DEF

Détachement soudain des dépôts de produits de corrosion suivi d'une accumulation en certains endroits du système de caloportage primaire [du réacteur nucléaire CANDU] et dû à des transitoires chimique, hydraulique ou de température.

Spanish

Save record 6

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