Radwaste Zeolite Cementation Process
Characteristics of dissolved pores and dissolution mechanism of zeolite
The reservoir in the Wuerhe Formation in the Mahu Sag, northwestern Junggar Basin, China, exhibits complex dissolution and cementation related to zeolite.
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RADIOACTIVE WASTE CEMENTATION VIA THE …
The cementation method has been developed to condition intermediate- and low-level waste (RW). Most of scientific and technical papers devoted to this method were published in the period from 1980 till early 2000's. These studies summarize the research on the properties of cement compounds and process parameters relevant for different RW
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Various additives for improving the performances of …
The performance of fixing specific radionuclides with fly ash has been improved after special treatment. Goni et al. (2006) used fly ash from coal combustion to synthesize fly ash belite …
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(PDF) Utilization of bentonite and zeolite in cementation of …
Zeolite has higher sorption capacity than bentonite for 137Cs while bentonite has higher sorption capacity for 85 Sr. Difference between bentonite and zeolite sorption capacity is more pronounced for 137Cs. ii. Bentonite and zeolite have almost equally moderate sorption capacity for …
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Solidification of spent radioactive organic solvent by sulfoaluminate
Zeolite, calcium hydroxide and MR-1 type emulsifier were mixed into the cement blends for improving the performance of solidified waste forms (SWF). The properties of SWF were evaluated in terms of mechanical strength, leachability and mineral phase analyses. The hydration products of SWF were characterized by X-ray diffraction (XRD).
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Radioactive Waste Management Research Group – …
Manufacture of Borosilicate Ceramics from various materials (Mount Merapi ash, glass, zeolite etc.) for the immobilization of radioactive waste. Study on the utilization of various materials (rice husk ash, Merapi ash, PLTU fly ash, sand blast, etc.) as pozzolanic materials in the cementation process of radioactive waste.
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IMMOBILIZATION OF RADIOACTIVE WASTE IN …
The radwaste streams produced were sufficient to cause dangerous effects to man and its ... Three types of new cements called fly ash-zeolite cement (F AZC) originates from dehydration by heating of the hydrated precursors formed at ... Cementation process 31 1.7.2.2. Bituminization process 33 1.7.2.3. Polymer processes 34
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Immobilisation of Radwaste in Synthetic Rock: An Alternative to Cementation
SOGETER is a waste conditioning process for Low Level radwaste (LLW) or Intermediate Level radwaste (ILW) such as sludge, soil, ashes, evaporator concentrate, concrete rubble, asbestos or sand. Such radioactive waste is usually solidified into a cement matrix, resulting in a 2 to 5 times volumetric waste increase, i.e. 1 m3 of initial raw waste generates 2 …
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Radwaste Management at Operating NPPs
Process of cementation lies in involving of radioactive substances into Portland cement mark 500 with following generation of solid monolith and it is based on the interaction between viscous substance of cement (calcium oxide, silicates, aluminates etc.) and water contained in waste without temperature rise.
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Solidification of radioactive wastes by cement-based materials
The uranium reconversion process is performed to convert concentrated UF6 into UO2. Ca ... and to provide more information for formula optimization, SAC blending zeolite, accelerator and Dura fiber was used as … Expand. 3. Save. Leaching behavior of cesium-137 in cement-waste composites. ... Cementation of radioactive borate liquid waste ...
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Thermogenetic degradation of early zeolite cement: An important process
The effect of oil emplacement on quartz cementation in reservoir sandstones is controversial; some studies have concluded that early oil emplacement can inhibit quartz cementation, leading to the ...
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Radioactive Wastewater Treatment Technologies: A Review
The process flow and waste liquid types of the post-treatment plant are reviewed. ... zeolite is cheap and easy to obtain and has a higher decontamination coefficient for radionuclides in water, between 62 and 68. ... Safonov A., Tregubova V., German K. Cementation of biodegraded radioactive oils and organic waste. J. Radioanal. Nucl. Chem ...
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Review Review on potential uses, cementing process, …
However, ammonia can be produced in the cementation process of MICP, which has a negative impact on the ecological environment. In the natural environment, the stability of the bio-carbonates is lower than that of the bio-phosphates. Therefore, this review presents a new kind of the bio-cement based on the bio-phosphate minerals, which have ...
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Evaluation of cementation of intermediate level liquid waste …
Evaluation of cementation of intermediate level liquid waste produced from fission 99Mo production process and disposal feasibility of cement waste form ... Hyun-Kyu Lee, Tack-Jin Kim, Gi-Yong Kim, Hongrae Jeon; Affiliations Jong-Sik Shon Radwaste Management Center, Korea Atomic Energy Research Institute, 111 Daedeok-daero, Yuseong-gu, Daejeon ...
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Solidification of radioactive wastes by cement-based materials
1977. TLDR. To assess the safety for disposal of a radioactive waste-cement composite, the leaching of I3'Cs from a waste composite into a surrounding fluid has been …
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Utilization of bentonite and zeolite in cementation of dry …
Both matrices can be classified as good solidify systems for cesium, specially the FABC-2-W/zeolite matrix in which the replacement of 50% of belite cement by the gismondine-type Na-P1 zeolite ...
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Overview of Radioactive Waste Treatment in Domestic …
In accordance with the Twelfth Five-Year Plan and 2020 Prospective Target, China will see a coexistence of multiple reactors, different nuclear technologies, and standards in the development of nuclear power, and it is foreseeable that similar situation will also occur in radwaste treatment.This paper reviews the different radwaste treatment technologies in line …
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Concrete and cement composites used for radioactive waste deposition
This review article presents the current state-of-knowledge of the use of cementitious materials for radioactive waste disposal. An overview of radwaste management processes with respect to the classification of the waste type is given. The application of cementitious materials for waste disposal is divided into two main lines: i) as a matrix for direct …
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Development of a unified technological process for cementing solid
The results of research on cementing finely dispersed, mixed, closely packed, and coarsely fragmented solid radioactive wastes by mixing, flow-through, and impregnation to create a unified complex of technological processes are presented. A new method of impregnation which consists of feeding under pressure through a probe into the bottom of a container with solid …
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Backgrounder on Radioactive Waste | NRC.gov
During the fission process, two things happen to the uranium in the fuel. First, uranium atoms split, creating energy that is used to produce electricity. The fission creates radioactive isotopes of lighter elements such as cesium-137 and strontium-90. These isotopes, called "fission products," account for most of the heat and penetrating ...
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Alternative Binders to Ordinary Portland Cement for …
2.2 How Do They Hydrate?. Hydration of CACs and CSACs occurs according to a dissolution–precipitation process. Hydration of CA, the main anhydrous phase of CAC, can …
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On the Creation of a Modern System for Handling Liquid …
The main advantages of cementation are: low-temperature process; well-proven technology; the cemented product is non-combustible and has good thermal stability, chemically and biochemically stable; all forms of waste can be included in the cement matrix. ... and the addition of zeolite (clinoptilolite) reduces the leaching rate of Cs137 by ...
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Reduction of cesium and cobalt-activity in liquid radwaste …
The changeover from cation exchange resin to clinoptilolite zeolite for cesium removal from liquid radwaste can save DPC about $250,000 in process and burial costs in one year. The economic advantage and impact of including clinoptilolite zeolite in the process train to the entire liquid radwaste process are also discussed in detail.
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Treatment of radioactive liquid waste by sorption on natural zeolite …
The effect of addition of zeolite on the strength of the cementation matrix was investigated. A superior combination was obtained as ASC 35 wt.%, zeolite 7 wt.% to mix 42 wt.% of resins with 16 wt ...
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Characteristics of dissolved pores and dissolution …
Zeolite cementation significantly affects the quality of these reservoirs, such as destroying their primary pores and physical properties or dissolving in reservoir fluids to form considerable secondary pores; Zeolite …
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Facility designed to test radwaste solidification solutions
The mock-up of the in-barrel cementation facility. Source: NUKEM Technologies. During the in-barrel cementation process, liquid radioactive waste is enclosed in a 200-l …
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zeolite process for water softening | Hard and Soft Water
Zeolite process for water softening Zeolite process for water softening has become a commercial success for the reason that zeolite can be easily regenerated. When Ca 2+ and Mg 2+ ions containing hard water is passes through a bed of sodium zeolite, the sodium ions are replace by the calcium and magnesium ions. Na 2 Ze + Ca(HCO 3) 2 → 2NaHCO ...
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Integrated radwaste treatment system lessons learned from …
The concentrated product, 37 to 41 percent solids by weight, is encapsulated in cement producing a stable, low-level waste form. The Integrated Radwaste Treatment …
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Waste management plans for ITER
In the radwaste building, space is allocated to holding tanks (for radioactive liquid effluents, oils, spent resins and concentrates), monitoring tanks, oil separation process, buffer storage, characterization, sampling and sorting, cutting and dismantling workstation, compaction, cementation, curing, tritium outgassing measurement, temporary ...
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04 . LIQUID WASTES
Liquid radwaste demineralization and ion exchange is more cost effective and produces the desired volume reduction. To some extent, these units also serve as adsorbers. Demineralization is discussed in sections 4.7 and 4.8. Adsorption involves the use of materials such as charcoal or zeolite to retain or retard movement of a material, i.e., iodine.
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