2 edition of Coupled heat and moisture flow in buffer materials used in a nuclear waste disposal vault found in the catalog.
Coupled heat and moisture flow in buffer materials used in a nuclear waste disposal vault
Atomic Energy of Canada Limited.
|Series||Technical record (Atomic Energy of Canada Ltd) -- 443|
|The Physical Object|
|Number of Pages||75|
As Congress outlined in the Nuclear Waste Policy Act of (NWPA), as amended, the role of the U.S. Nuclear Regulatory Commission (NRC) is to serve as the independent regulator for the design, construction, operation, and eventual decommissioning of a geologic repository for permanent disposal of high-level waste (HLW) at Yucca Mountain. The Nuclear Energy Agency (NEA) is a specialised agency within the Organisation for Economic Co-operation and Development (OECD), an intergovernmental organisation of industrialised countries, based in Paris, France. The mission of the NEA is to assist its Member countries in maintaining and further developing, through international co-operation, the scientific, technological and legal bases.
Waste Management: Disposal of Radioactive Waste the waste overpack and the host rock mainly to restrict the groundwater flow towards the waste form and to retard the migration of radionuclides in the event of their release from the overpack. Swelling bentonitic clays predominantly composed of smectite mineral have emerged as preferableFile Size: 1MB. coupled. Figure 1, shows the expected processes in the near field of the HLW repository. In the early work, the coupling system, which was THM, was compared to a heat conductivity code and it proved that, this heat conductivity code is conservative . Fig.1 Expected processes for the HLW disposal .
nuclear fuel that contains more than one oxide of fissile material, usually consisting of plutonium blended with natural uranium, reprocessed uranium, or depleted uranium Spent Fuel the used fuel elements that were irradiated in a nuclear reactor. The possibility of permanent disposal of nuclear waste in salt has been investigated for decades. This interest is primarily due to the availability of the stable salt formations and the desirable thermal-hydro-mechanical behaviors of salt (e.g. high thermal conductivity, low permeability, self-healing).
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Coupled Processes Associated with Nuclear Waste Repositories covers the proceedings of the International Symposium on Coupled Processes Associated with Nuclear Waste Edition: 1.
A computer code TRUCHAM developed to model the coupled heat and moisture flow through a porous medium is used to assess the thermohydraulic performance of the clay-based engineered barrier encapsulating nuclear waste containers in a deep geological disposal vault in the borehole emplacement concept.
This paper contains an overview of the development of the numerical model and its application to the buffer Cited by: In a partly saturated soil system, such as that represented by the buffer/backfill material currently being considered as a barrier for a nuclear fuel waste isolation vault (Lopez et al., ; Yong et al., ), imposition of a thermal gradient on the system evokes both coupled heat and mass by: A computer code TRUCHAM developed to model the coupled heat and moisture flow through a porous medium is used to assess the thermohydraulic performance of.
Prototype Code Development for Numerical Experiments on the Coupled Thermo-Hydro-Mechanical and Chemical Processes in the Near-Field of a High-Level Radioactive Waste Repository. Atsushi Neyama, Akira Ito, Masakazu Chijimatsu, Yoshinao Ishihara.
Experimental modelling of the near-field thermal regime in a nuclear-fuel waste disposal vault. Author links open overlay panel H.S.
Radhakrishna 1 K.C. Lau 1 Cited by: 5. This paper reviews the multi-phase modeling of moisture transport process in pore structure of cement-based materials used as engineered barriers in radioactive waste disposal. The emphasis is put on the fundamental relationship of moisture isotherm and Author: X.
Pang, K. Li, C. The bentonite layer that surrounds and protects the canisters in a nuclear waste repository deep down in rock experiences a complex coupled heat and moisture flow process. The released heat from the canister will cause an initial : Johan Claesson.
Abstract. Salt rock or rock with salty ground water are often encountered as host media for the underground disposal of radioactive waste. The nuclear waste, contained in a metallic canister, is usually placed inside a tunnel or a shaft excavated in the rock deposit together with a buffer of compacted bentonite inserted between the host rock and the canister to provide hydro-mechanical Cited by: the heat from waste combustion can be used to generate energy reduce the amount of material that enters the waste stream.
The second step in the recycling loop is _____. the elimination of number 1 plastics desert regions used for unsafe nuclear waste disposal. Radioactive waste disposal facilities are investigated for construction in deep strata 50– m under the ground [1–5].As shown in Fig.
2, the use of clayey materials such as bentonite, and cementitious materials, such as concrete and mortar either independently or in combination as back filling materials or engineered barrier materials, has been studied.
As a low permeability, high thermal conductivity and mechanical strength soil, bentonite has been widely used as buffer/backfill material for nuclear waste disposal.
Underground water flow. In the context of higher activity radioactive waste disposal, most of the research activities on gas migration have been carried out based on a fully saturated buffer. It is considered that prior to gas generation, uniform saturation of the buffer took place and all the voids have been occupied by porewater, causing the buffer to be nearly Cited by: 5.
Prediction of the Temperature of Enclosures for Nuclear Waste Disposal. Finite element models had been developed considering radiative and conductive heat transfer . This work consist application of such models for nuclear waste disposal containers. The temperature of enclosure walls are predicted with the help finite element method.
In order to design the power of the heater and the parameter of the heat insulation layer, as well as the evolution of the heat, water flow and stress in the buffer material, numerical modeling.
In India, all disposal facilities are located at the nuclear power plants. Therefore, this situation establishes the disposal site’s hydrogeologic conditions.
The waste forms, backfill materials, and other engineered barriers are then evaluated for optimisation and are incorporated into the site design and operations. Purchase Nuclear Waste Disposal - 1st Edition. Print Book & E-Book. ISBNBook Edition: 1. At present, packaging material selection for geological disposal is different in variety countries because of different geological conditions.
In short, current candidates for waste container material of the canister are carbon steel, cast iron, titanium, stainless steel, Hastelloy alloy, copper and copper alloys .Author: Fraser King. Research on argillite as a possible host rock for nuclear waste disposal is still an open subject since many issues need to be clarified.
In the Underground Research Laboratories constructed for Cited by: 7. In short, no one wants nuclear waste near their communities, even if it's buried many miles away in a vault in the desert.
The proposed Yucca Mountain storage facility, located in Nevada about miles ( kilometers) northwest of Las Vegas, is a good example of the Author: Nathan Chandler. Nuclear waste disposal 1. SUBMITTED BY- Aarush Jewaria 2.
• Radioactive and extremely toxic byproducts of nuclear medicine and nuclear weapons industries are known as nuclear waste. 3. 1. EXEMPT WASTE & VERY LOW LEVEL WASTE 2. VERY SHORT LIVED WASTE (VSLW) 3.
VERY LOW-LEVEL WASTE (VLLW) 4. LOW-LEVEL WASTE (LLW) 5.LOW LEVEL WASTE: Low level waste include materials that are used to handle nuclear material such as radiation suits and laboratory equipment. They are normally stored for up to 15 years in secure storage and then, after careful packaging they can be disposed of as normal waste.
Conclusion Proper disposal of nuclear waste is still a challenging issue that constrains the growth of nuclear power. The most currently-used method for nuclear waste disposal is storage, either using steel cylinders as radioactive shield or using deep and stable geologic formations.
References 1. Bhabha Atomic Research Centre (BARC).