TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

SHALLOW DISPOSAL [22 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2012-06-26

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Different disposal modules are used in some places for specific purposes. Pits are used for disposal of bulky, non-compactible wastes such as tanks, piping and large items of equipment. As the pit is filled, the disposed wastes are backfilled and covered with soil or concrete. Other disposal modules, such as lined shallow wells and shafts, may be provided with engineered barriers....

CONT

The concept [burying the waste deep underground in the Canadian Shield] isolates used fuel from the environment using a series of natural as well as manmade barriers. Used nuclear fuel bundles would be contained in vaults 500 to 1,000 metres below ground. These vaults would consist of a network of tunnels and disposal rooms about 2 kilometres by 2 kilometres that could hold 191,000 tonnes of used fuel.

CONT

Typically, each [shallow land burial] trench has a sloping floor cut into the natural soil and a French drain of gravel down one of the long sides. The trench bottom is covered with a foot or two of sand to allow water to flow freely into the French drain, especially when the trench is open during operations. Sampling pipes or tubes are placed against the trench wall, with their lower ends in the French drain, when the trench is dug. Monitoring of each disposal unit(engineered trench) is accomplished by sampling any water found in the French drain through these tubes and analyzing its contents.

CONT

... the aboveground vault is a large steel-reinforced concrete structure with vertical access (through an open top) for placement of the waste. Within each structure there are numerous disposal units. Each disposal unit is sealed when filled to capacity. Individual units are sized to accommodate waste deliveries for about 1 to 2 weeks.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
CONT

C'est l'association des propriétés cumulées du déchet, de sa matrice d'enrobage ou de blocage et, dans certaines conditions, de l'enveloppe des colis et des éléments constitutifs des modules de stockage (plates-formes et alvéoles), qui constitue le premier système de barrières d'isolement des déchets.

CONT

Pour les déchets d'activité moyenne, des monolithes de béton peuvent être obtenus à partir de tranchées bétonnées dans lesquelles on dispose les déchets et qui sont ensuite obturées par injection d'un coulis de ciment. Pour les déchets de faible activité, on peut constituer un tumulus sur des aires aménagées, planes, bétonnées et drainées. La figure 18 montre schématiquement l'exemple d'un stockage mixte tumulus sur monolithe. On y voit le réseau de canalisations enterrées qui ceinture chaque module de stockage et qui est destiné à contrôler l'efficacité des barrières et en particulier de la couche argileuse. [...] Les tumulus comprennent les blocs de béton en rangées de 5 m de haut constituant des cellules de 10 m X 30 m.

CONT

Unité de stockage de combustible irradié.

OBS

Voir aussi «case (bétonnée)» et «monolithe».

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 1

Record 2 2012-01-17

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

The simplest form of engineered trench, or shallow land burial, relies mainly on the properties of the excavated overburden and the geohydrologic properties of the site for containment. The intent is to ensure that the travel time of radionuclides from the waste to the human environment via groundwater is long compared to the nuclide half lives. Travel time is long because of low hydraulic gradients, soils of low water permeability and high contaminant adsorption, and lengthy pathways across exclusion zones.

CONT

Illustration of a shallow land burial facility(engineered trench).... Figure 9 outlines the engineered trench option. In this option, the major characteristics are that :. wastes are placed below grade(in suitable hydrogeological conditions) in trenches having a specially prepared bottom that incorporates a drainage system;. there is an earthen cover over the wastes that easily can incorporate additional engineered barriers;. structural stability is not provided by the disposal facility; and. for structural stability, voids between the waste containers are filled with sans or earthen materials-bulk wastes may be compacted.

CONT

Shallow-land burial in trenches was the original low-level waste disposal practice at the beginning of the nuclear era. The method originally consisted in emplacing the wastes in trenches dug into the ground at depths ranging from 3 to 6 m and covering the emplaced wastes with about 1 m of soil.

CONT

Burial trenches without additional engineered barriers can be used provided that radionuclides will migrate into groundwater beneath the site at an acceptable rate.

OBS

As used in this context, the word "engineered" refers to the fact that features and materials have been designed or selected to accomplish certain functions. In shallow land burial the materials are usually natural rather than man-made.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
CONT

Des stockages par enfouissement à faible profondeur sont réalisés aux États-Unis, en Grande-Bretagne, en U.R.S.S., au Canada et en France. Dans les deux premiers pays, le stockage se fait sur des déchets pas ou peu conditionnés, dans des tranchées en pleine terre.

CONT

Stockage de surface. [...] Le stockage peut être réalisé en tranchées, mode acceptable pour des terrains argileux, si la nappe phréatique est suffisamment basse.

OBS

Voir aussi «tranchée bétonnée».

OBS

Dans ce contexte, l'adjectif «engineered» pourrait se rendre par «spécialement conçu». Voir l'observation qui se trouve dans le module anglais de la fiche.

PHR

Tranchée bétonnée (à faible profondeur, au voisinage de la surface).

PHR

Couverture de tranchée. Enfouissement, stockage dans des tranchées. Stockage en tranchées.

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 2

Record 3 2011-02-17

English

Subject field(s)
  • Nuclear Waste Materials
CONT

Intermediate-level waste contains higher amounts of radioactivity and some requires shielding. It typically comprises resins, chemical sludges and metal fuel cladding, as well as contaminated materials from reactor decommissioning. It may be solidified in concrete or bitumen for disposal. Generally short-lived waste(mainly from reactors) is buried in a shallow repository, but long-lived waste(from fuel reprocessing) will be disposed of deep underground.

CONT

Intermediate-Level Waste (ILW) - requires shielding and does not generate significant heat. ILW is generally grouped with LLW [low-level wastes], rather than HLW [high-level wastes], for purposes of this report.

OBS

The plural form "wastes" is very frequently used.

French

Domaine(s)
  • Déchets nucléaires
CONT

Les déchets peuvent présenter des activités très diverses; on les classe en déchets de haute, de moyenne ou de faible activité, mais il faut noter que les distinctions ne sont pas toujours nettes : si, par haute activité, on désigne des concentrations de centaines ou de milliers de Ci/1, (curies par litre; 1 Ci = 3,7 X 1010 désintégrations par seconde) et par faible activité des concentrations de l'ordre du mCi/1, on trouve entre ces cas extrêmes toute une gamme de déchets d'activités intermédiaires.

CONT

Déchets de faibles et moyennes activités (déchets FMA).

OBS

L'emploi de la forme plurielle «déchets» est très fréquent.

Spanish

Campo(s) temático(s)
  • Desechos nucleares
Save record 3

Record 4 2010-09-27

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
OBS

Illustration of a shallow land burial facility(engineered trench).... Figure 9 outlines the engineered trench option. In this option, the major characteristics are that : wastes are placed below grade(in suitable hydrogeological conditions) in trenches having a specially prepared bottom that incorporates a drainage system; there is an earthen cover over the wastes that easily can incorporate additional engineered barriers; structural stability is not provided by the disposal facility; and for structural stability, voids between the waste containers are filled with sand or earthen materials-bulk wastes may be compacted.

Key term(s)
  • shallow-land storage facility
  • shallow ground storage facility
  • near surface storage facility

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
OBS

Voir aussi «stockage à faible profondeur» et «enfouissement à faible profondeur».

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 4

Record 5 2010-07-23

English

Subject field(s)
  • Mine Warfare
  • Naval Mines
DEF

The delivery of explosive ordnance disposal divers, by helicopters or, occasionally, small surface vessels, to previously swept drifting mines or shallow moored mines to carry out disposal operations.

OBS

mine countermeasures pouncer procedure; pouncer procedure : terms and definition standardized by NATO.

French

Domaine(s)
  • Guerre des mines
  • Mines marines
DEF

Acheminement, par des hélicoptères ou, occasionnellement, par de petits bâtiments de surface, de plongeurs-démineurs jusqu'à des mines dérivantes ou des mines à orin à faible immersion précédemment draguées, afin d'en assurer le déminage.

OBS

procédure de parachèvement du déminage : terme et définition normalisés par l'OTAN.

Spanish

Save record 5

Record 6 2010-04-07

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

... the concept of deep geological disposal in stable rock formations is a fully acceptable method of disposing permanently of high-level radioactive wastes from the nuclear fuel cycle.

OBS

... the Federal Republic of Germany has chosen the policy that all radioactive waste will be placed in deep geological formations. The Asse salt mine, located in a salt diapir in Lower Saxony, has served as the national R&D facility on disposal of all types of radioactive waste.

OBS

Of the various disposal concepts which have been suggested for LLW, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches... ;containment in an engineered below-ground vault; and emplacement in a shallow mined cavity in rock.

OBS

Emplacement of wastes in abandoned mines.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
CONT

Déchets à vie longue : le stockage en formation géologique. [...] la solution retenue est l'enfouissement à grande profondeur, quelques centaines de mètres, dans des formations géologiques choisies pour leur nature et leur configuration favorables à la maîtrise des transferts.

CONT

La tâche A4 «Recherches sur le stockage géologique profond et le stockage au voisinage de la surface» ne peut être conceptuellement séparée de la réalisation et l'exploitation des installations expérimentales souterraines [...]

OBS

On réserve normalement le terme «évacuation» pour désigner le stockage définitif.

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 6

Record 7 - external organization data 2001-10-30

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
  • Compartment - Canadian Nuclear Safety Commission
CONT

A number of disposal methods for nuclear fuel wastes have been suggested internationally, including ejection of the waste into outer space; transmutation of the radioactive elements; emplacement in a polar ice cap; and burial within various geological formations, both on the continents and beneath the sea floor.

CONT

Of the various disposal concepts which have been suggested for LLW, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches with minor engineered features to inhibit nuclide migration, containment in an engineered below-ground vault; and emplacement in a shallow mined cavity rock.

Key term(s)
  • disposal in land

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
  • Tiroir - Commission canadienne de sûreté nucléaire
CONT

Plusieurs méthodes d'évacuation des déchets de combustible nucléaire ont été suggérées à travers le monde, y compris le lancement des déchets dans l'espace, la transmutation des éléments radioactifs, le dépôt sous la calotte polaire et l'enfouissement à l'intérieur de diverses formations géologiques, soit sous terre, soit sous les fonds marins.

CONT

Des stockages par enfouissement à faible profondeur sont réalisés aux États-Unis, en Grande-Bretagne, en U.R.S.S., au Canada et en France. Dans les deux premiers pays, le stockage se fait sur des déchets pas ou peu conditionnés, dans des tranchées en pleine terre.

Key term(s)
  • élimination dans le sol

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
  • Compartimiento - Comisión Canadiense de Seguridad Nuclear
Key term(s)
  • eliminación en el suelo
Save record 7

Record 8 2001-06-29

English

Subject field(s)
  • Radioactive Contamination
DEF

The movement of radionuclides through various media due to fluid flow and/or by diffusion or effusion.

CONT

Shallow land burial is a method already applied on an industrial scale for the disposal of low-activity solid waste. Therefore, the research in this field is mainly oriented to the improvement of the disposal techniques in order to ensure a better protection for the man and his environment. More specifically, the following three topics are covered :-Status of existing experience.-Improvement of burial techniques.-Radionuclide migration and safety aspects.

Key term(s)
  • radioactive nuclide migration
  • migration of radioactive nuclides

French

Domaine(s)
  • Pollution par radioactivité
CONT

S'agissant des études de sûreté, l'accent est mis sur le développement de modèles complexes permettant de déterminer l'impact radiologique à long terme d'un stockage de déchets; ces modèles sont obtenus par couplage de modèles spécifiques résultant des études d'évolution à long terme des colis de déchets, d'interaction des barrières et de la migration des radionucléides au travers de l'environnement matériel du stockage.

Key term(s)
  • migration de nucléides radioactifs

Spanish

Campo(s) temático(s)
  • Contaminación por radioactividad
Key term(s)
  • migración de núclidos radioactivos
  • migración de nucleidos radioactivos
Save record 8

Record 9 1996-06-05

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Of the various disposal concepts which have been suggested for LLW, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches with minor engineered features to inhibit nuclide migration; containment in an engineered below-ground vault; and emplacement in a shallow mined cavity in rock.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 9

Record 10 1996-06-05

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
  • Radiation Protection
CONT

Typically, each [shallow land burial] trench has a sloping floor cut into the natural soil and a french drain of gravel down one of the long sides. The trench bottom is covered with a foot or two of sand to allow water to flow freely into the french drain, especially when the trench is open during operations. Sampling pipes or tubes are placed against the trench wall, with their lower ends in the french drain, when the trench is dug. Monitoring of each disposal unit(engineered trench) is accomplished by sampling any water found in the french drain through these tubes and analyzing its contents. Sampling wells are placed around the perimeter of the facility, and elsewhere if desired, and air sampling is conducted at least until the end of the operations.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
  • Radioprotection

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
  • Protección contra la radiación
Save record 10

Record 11 1996-06-05

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

The simplest form of engineered trench, or shallow land burial, relies mainly on the properties of the excavated overburden and the geohydrologic properties of the site for containment. ... Shallow land burial consists of excavating a trench, placing waste containers in the trench up to a prescribed level, but generally below the original ground surface, backfilling between the containers with sand or other free-flowing earthen material and covering the trench with earthen material.

CONT

LLW [low-level wastes] disposal to date in the USA has been almost entirely by what is commonly called shallow land burial(SLB), i. e., unlined trenches.

CONT

In France, low and medium level waste have been disposed of by shallow land burial at the La Manche disposal centre since 1969. Two types of manmade structures are used for the disposal of conditioned waste :-monoliths... ;-tumuli....

OBS

See also "ground disposal" and "shallow disposal".

Key term(s)
  • shallow-land burial
  • shallow ground burial
  • near surface burial

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
CONT

Des stockages par enfouissement à faible profondeur sont réalisés aux États-Unis, en Grande-Bretagne, en URSS, au Canada et en France. Dans les deux premiers pays, le stockage se fait sur des déchets pas ou peu conditionnés, dans des tranchées en pleine terre.

CONT

Déchets de faible et moyenne activité. [...] Le mode d'évacuation retenu est l'enfouissement à faible profondeur dans des structures en béton [...]

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 11

Record 12 1996-06-05

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Shallow land burial trenches are typically long, narrow, excavations with an engineered floor, an engineered drainage collection and monitoring system, and an engineered cover system.

OBS

As used in this context, the word "engineered" refers to the fact that features and materials have been designed or selected to accomplish certain functions. In shallow land burial the materials are usually natural rather than man-made.

CONT

Typically, each [shallow land burial] trench has a sloping floor cut into the natural soil and a French drain of gravel down one of the long sides. The trench bottom is covered with a foot or two of sand to allow water to flow freely into the French drain, especially when the trench is open during operations. Sampling pipes or tubes are placed against the trench wall, with their lower ends in the French drain, when the trench is dug. Monitoring of each disposal unit(engineered trench) is accomplished by sampling any water found in the French drain through these tubes and analyzing its contents. Sampling wells are placed around the perimeter of the facility, and elsewhere if desired, and air sampling is conducted at least until the end of the operations.

Key term(s)
  • shallow-land burial trench
  • shallow ground disposal trench
  • near surface disposal trench

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 12

Record 13 1996-06-05

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Illustration of a shallow land burial facility(engineered trench).... Figure 9 outlines the engineered trench option. In this option, the major characteristics are that : wastes are placed below grade(in suitable hydrogeological conditions) in trenches having a specially prepared bottom that incorporates a drainage system; there is an earthen cover over the wastes that easily can incorporate additional engineered barriers; structural stability is not provided by the disposal facility; and for structural stability, voids between the waste containers are filled with sand or earthen materials-bulk wastes may be compacted.

Key term(s)
  • shallow-land burial facility
  • shallow ground burial facility
  • near surface burial facility

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 13

Record 14 1996-06-05

English

Subject field(s)
  • Nuclear Waste Materials
  • Waste Management
CONT

In Switzerland two types of repository are being considered for disposal of intermediate and LLW. Type Q are shallow rock caverns to be excavated within 100 m of the land surface and are designed to hold only LLW. Type B repositories would be caverns excavated at depths of several hundred metres and containing both LLW and ILW.

French

Domaine(s)
  • Déchets nucléaires
  • Gestion des déchets
OBS

Voir aussi «caverne excavée» et «caverne d'évacuation».

Spanish

Campo(s) temático(s)
  • Desechos nucleares
  • Gestión de los desechos
Save record 14

Record 15 1996-05-13

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
OBS

... within 30 m of the surface ....

OBS

The two terms "disposal" and "storage" are very often used interchangeably but they should be distinguished. "Disposal" should be used only in referring to permanent storage.

OBS

See also "shallow land burial".

Key term(s)
  • shallow ground disposal
  • near surface storage

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
CONT

Déchets à vie courte : le stockage en surface et subsurface. L'option principale retenue en France, pour les déchets de la catégorie A, dont l'essentiel de la radioactivité aura disparu dans 300 ans, est leur stockage en surface, ou à faible profondeur. Leur isolement est assuré par des barrières artificielles les protégeant notamment contre les eaux de ruissellement et souterraines. La protection contre l'action éventuelle de l'homme, et le contrôle de l'étanchéité, sont assurés par un gardiennage et une surveillance pendant une durée maximale de trois cents ans après la fermeture.

CONT

L'étude de certaines barrières pour le stockage au voisinage de la surface de déchets de faible activité dans des structures ouvragées.

OBS

Le terme «évacuation» doit être utilisé pour désigner le stockage permanent.

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 15

Record 16 1996-05-10

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

A schematic diagram of a modular concrete canister disposal(MCCD) facility is shown in Figure 5. 5. Modular concrete canister disposal consists of placing individual waste containers in modular concrete structures(i. e. overpacking the individual waste containers in concrete canisters) and disposing of the concrete canisters in shallow low trenches below natural grade. Except for the use of the concrete canisters, the physical details of belowground modular concrete canister disposal closely resemble those of shallow land disposal(in that disposal is below grade with shallow cover) and belowground vaults(in that structured capability is also provided by the facility).

CONT

Modular concrete canister disposal. Figure 11 shows the canister disposal option. Its main characteristics are that :. wastes are placed in concrete canisters that can then be placed either in shallow, below-grade trenches or above grade on a concrete pad;. there is a shallow earthen cover over the waste trenches containing the canisters(earth or soil may be mounded over the canisters in the above-ground version) ;. structural stability is provided by each canister;. the structure is modular in nature; and. safety may be enhanced in future by additional engineered barriers.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
OBS

Voir aussi «silo», «silo en béton» et «installation d'évacuation par silos de stockage modulaires en béton».

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 16

Record 17 1996-05-10

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Of the various disposal concepts which have been suggested for low-level wastes, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches with minor engineered features to inhibit nuclide migration; containment in an engineered below-ground vault; and emplacement in a shallow mined cavity in rock.

CONT

Mined caverns. Rock cavities can provide a high degree of containment and isolation for waste if suitable geologic conditions are present. ... Preferred characteristics of the host rock are: low frequency of open fractures to restrict groundwater flows, definable structure so that uncertainties in advance of excavation are low, and good rock competence so that adequately sized chambers can be excavated safely.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 17

Record 18 1996-04-29

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Geological disposal .... Five ... countries have selected granite formations for the underground disposal vaults, one a volcanic tuff formation, one a salt formation, and one a clay formation. The other countries are studying disposal in granite, salt, clay, and sedimentary rock.

OBS

... the Federal Republic of Germany has chosen the policy that all radioactive waste will be placed in deep geological formations. The Asse salt mine, located in a salt diapir in Lower Saxony, has served as the national R&D facility on disposal of all types of radioactive waste.

OBS

Of the various disposal concepts which have been suggested for LLW, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches... ;containment in an engineered below-ground vault; and emplacement in a shallow mined cavity in rock.

OBS

emplacement of wastes in abandoned mines.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires
CONT

[...] une attention toute particulière est portée sur les mécanismes d'altération en conditions réalistes de stockage géologique, c'est-à-dire avec mise en jeu de paramètres importants tels que la température, la pression, la nature de la roche d'accueil, celle du matériau de remplissage ou bien celle des eaux souterraines par exemple.

CONT

La vitrification est choisie pour les déchets de haute activité qui seront ultérieurement envoyés vers des stockages géologiques.

CONT

[...] déchets justiciables de l'évacuation en formation géologique terrestre.

CONT

L'enfouissement sous les fonds des océans. Il ne s'agit pas d'une immersion de déchets mais d'un stockage en formation géologique, formation de type particulier puisque subocéanique. [...] Cette méthode combine les avantages du stockage dans les formations argileuses à celui de l'immersion dans les fosses océaniques profondes [...].

OBS

Le terme anglais "disposal" (en français : "évacuation") désigne tout particulièrement le stockage permanent. Voir "disposal" et "permanent disposal" dans TERMIUM.

Spanish

Campo(s) temático(s)
  • Gestión de los desechos
  • Desechos nucleares
Save record 18

Record 19 1995-04-03

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Modular concrete canister disposal. Figure 11 shows the canister disposal option. Its main characteristics are that :. wastes are placed in concrete canisters that can then be placed either in shallow, below-grade trenches or above grade on a concrete pad;. there is a shallow earthen cover over the waste trenches containing the canisters(earth or soil may be mounded over the canisters in the above-ground version) ;. structural stability is provided by each canister;. the structure is modular in nature; and. safety may be enhanced in future by additional engineered barriers.

CONT

Quadricells - These are aboveground structures consisting of four cells in double-walled concrete. They are used primarily to store resins and occasionally to store highly active core components. These can be viewed as aboveground modular concrete canisters.

OBS

See also "modular concrete canister disposal (facility), "storage canister" and "concrete canister".

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Save record 19

Record 20 1993-09-10

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Of the various disposal concepts which have been suggested for LLW, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches with minor engineered features to inhibit nuclide migration; containment in an engineered below-ground vault; and emplacement in a shallow mined cavity in rock.

OBS

See also "belowground vault" and "storage vault".

Key term(s)
  • engineered below-ground waste disposal vault
  • engineered belowground waste storage vault

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Save record 20

Record 21 1993-09-10

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

Of the various disposal concepts which have ben suggested for LLW, only three were compatible with the geological characteristics of the CRNL property : burial in excavated sand trenches with minor engineered features to inhibit nuclide migration; containment in an engineered below-ground vault; and emplacement in a shallow mined cavity in rock.

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Save record 21

Record 22 1993-09-10

English

Subject field(s)
  • Waste Management
  • Nuclear Waste Materials
CONT

A schematic diagram of a modular concrete canister disposal(MCDD) facility is shown in Figure 5. 5. Modular concrete canister disposal consists of placing individual waste containers in modular concrete structures(i. e. overpacking the individual waste containers in concrete canisters) and disposing of the concrete canisters in shallow low trenches below natural grade. Except for the use of the concrete canisters, the physical details of belowground modular concrete canister disposal closely resemble those of shallow land disposal(in that disposal is below grade with shallow cover) and belowground vaults(in that structured capability is also provided by the facility).

OBS

See also "concrete canister", "storage canister" and "modular concrete canister disposal".

Key term(s)
  • modular concrete silo disposal facility

French

Domaine(s)
  • Gestion des déchets
  • Déchets nucléaires

Spanish

Save record 22

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