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Estimative of dilution factor for radioactive ijpec effluents employing the H-3 and Cs radiotracers present as pollutant; Estimativa do fator de diluicao para efluentes radioativos liquidos empregando os radiotracadores H-3 e Cs presentes cauerdo poluentes. The average of dilution factors obtained at the first and second liberation day were 4. The dilution factors were estimated in operational and laboratory study, in a single controlled discharge of the TR1 tank.
El estudio comprende la determinacion de los niveles – de radiactividad natural – de contaminacion artificial con objeto de determinar la parte que corresponde a de centros nucleares. Se citan varios ejemplos correspondientes a zonas de referencia. La mayor parte de la radiactividad artificial parece deberse a las precipitaciones radiactivas atmosfericas; esto no es sorprendente si se tiene en cuenta la cantidad de isotopos radiactivos eliminados hasta ahora en Francia.
Los autores han efectuado algunos ensayos de laboratorio. Gracias a ellos han podido precisar determinados mecanismos, han wcuerdo sus conocimientos sobre la contaminacion de los lugares y han podido mejorar sus metodos de muestreo. Ensayos de laboratorio Versaban sobre: Poluchennye rezul’taty Dl godu bylo nachato postojannoe izuchenie vlijanija jadernyh ustanovok.
Jeto izuchenie ohvatyvaet opredelenie urovnej – estestvennoj radioaktivnosti – iskusstvennogo zagrjaznenija s tem, chtoby ustanovit’ dolju zagrjaznenija, vyzyvaemuju jadernymi centrami. Privodjatsja primery po otdel’nym zonam.
SEGURIDAD INTERNA EN ERON by HERNAN MONROY CAMARGO on Prezi
Predstavljaetsja, chto naibol’shaja chast’ iskusstvennoj radioaktivnosti vyzyvaetsja radioaktivnymi osadkami; jeto neudivitel’no, esli prinjat’ vo vnimanie kolichestvo radioaktivnyh izotopov, vybroshennyh do nastojashhego vremeni vo Francii.
Byl proveden celyj rjad laboratornyh opytov. Oni pomogli utochnit’ nekotorye mehanizmy, uvelichili znanija. Equilibrio liquido-liquido -vapor de dwl ternarias: Application of biosorbents in treatment of the radioactive liquid waste; Aplicacao de biossorventes no tratamento de rejeitos radioativos liquidos. Radioactive liquid waste containing organic compounds need special attention, auerdo the treatment processes available are expensive and difficult to manage.
The biosorption is a potential treatment technique that has been studied in simulated wastes. Among the potential biomasses, agricultural residues have very attractive onpec, as they allow for the removal of radionuclides present in the waste using a low cost biosorbent.
The aim of this study was to evaluate the potential use of different biomass originating from agricultural products coconut fiber, coffee husk and rice husk inpfc the treatment of real radioactive liquid organic waste.
Experiments with these biomass were made including 1 Preparation, activation and characterization of acierdo 2 Conducting biosorption assays; and 3 Evaluation of the product of immobilization of biomasses in cement. The biomasses inpef tested in raw and activated forms.
At the end of the experiment, the biomass was separated by filtration and the remaining concentration of radioisotopes in the filtrate was determined by ICP-OES and gamma spectrometry. The studied waste contains natural uranium, americium and cesium The results were evaluated by maximum experimental sorption capacity and isotherm and kinetics ternary models.
The properties evaluated to determine the quality of the immobilization product were free water, mechanical strength, workability and acuerddo time. These results suggest that biosorption with raw coffee husk and activated coconut fiber can be applied in the treatment of radioactive liquid organic wastes containing uranium, americium and cesium Evaluation of the dispersion of oil refinery liquid effluent; Avaliacao da dispersao de efluente liquido de refinaria de petroleo.
In this paper, two techniques to evaluate the dispersion of the effluent of an oil refinery are inppec. Thus, the dispersion plume was characterized by field measurements of electrical conductivity and by computational simulation Cormix simulator.
Ancient history – wwx
The behavior of the effluent was evaluated until m after the discharge. The results show that the measurement inpeec electrical conductivity is a suitable technique to evaluate the dispersion of oil refinery wastewaters, since they have high conductivity and for this reason there is a strong contrast between the values of the wastewater and the ambient background. Furthermore, other water quality parameters had a dispersion behavior similar to that shown by the conductivity.
The dispersion plume generated by the inlec simulator showed knpec concordance with the field data. In this manner, computational simulation can be a useful tool to evaluate the dispersion of discharges considering hypothetical scenarios, as inpe as to design the discharge channel.
Approach to the problem of liquid effluents in petrochemical plants; Abordagem do problema efluentes liquidos em plantas petroquimicas. It represents the typical example of petrochemical company that uses the responsible care. The company looks for solve the liquid effluent problems of its units at a complete view. First of all, they made a complete report of the environmental scenario through the operational conditions it included the collect system, effluent treatment, etc.
In the following step was made the necessary changes to establish the effluents pollute level below the allowable levels and to avoid soil contamination. The company has made the modifications at the following systems: Application of macrophytes as biosorbents for radioactive liquid waste treatment; Aplicacao de macrofitas como biossorventes no tratamento de rejeitos radioativos liquidos.
Radioactive waste as any other type of waste should be treated and disposed adequately. It is necessary to consider its physical, chemical and radiological characteristics for choosing the appropriate action for the treatment and final disposal. Many treatment techniques currently used inpecc economically costly, often invalidating its use and favoring the study of other treatment techniques.
Dle of these techniques is biosorption, which demonstrates high potential when applied to radioactive waste. This technology uses materials of biological origin for removing metals. Among potential biosorbents found, macrophyte aquatics are useful because they may dwl uranium present in the liquid radioactive waste at low cost.
This study aims to acuero the biosorption capacity of macrophyte aquatics Pistia stratiotes, Limnobium laevigatum, Lemna sp and Azolla sp in the treatment of liquid radioactive waste. This study was divided into two stages, the first one is characterization and preparation of biosorption and the other is inped, carried out with uranium solutions and real samples.
The biomass was tested in its raw form and biosorption assays accuerdo performed in polypropylene vials containing 10 ml of solution of uranium or 10ml of radioactive waste and 0. The behavior of biomass was evaluated by sorption kinetics and isotherm models. The highest sorption capacities found was The equilibrium times obtained were 1 hour for Lemna sp, and 30 minutes for Azolla sp. With the real waste, the macrophyte Azolla sp presented a sorption capacity of 2.
These results suggest that Azolla sp has a larger capacity of biosorption, therefore it is more suitable for more detailed studies of treatment of liquid radioactive waste. Liquid radioactive waste processing improvement of PWR nuclear power plants; Melhorias no processamento de rejeitos liquidos radioativos de usinas nucleares PWR.
Coordenacao dos Programas de Pos-graduacao de Engenharia. Programa de Engenharia Nuclear]. The study evaluate an inorganic ion exchange to process the low level liquid radwaste of PWR nuclear plants, so that the level of the radioactivity in the effluents and the solid waste produced during the treatment acherdo these liquid radwaste can be reduced.
The work compares two types of ion exchange materials, a strong inpwc cation exchange resin, that is the material typically used to remove radionuclides from PWR nuclear plants wastes, and a mordenite zeolite.
These exchange 001 were used to remove cesium from a synthetic effluent containing only this ion and another effluent containing cesium and cobalt. The breakthrough curves of the zeolite and resin using a fix bed reactor were compared. The results demonstrated that the zeolite is more efficient than the resin in removing cesium from a solution containing cesium and cobalt.
The results also showed that a bed combining zeolite and resin can process more volume of an effluent containing cesium and cobalt than a bed resin alone.
Bioremoval of Am and Cs from liquid radioactive wasters by ackerdo consortiums; Biorremocao de Am e Cs de rejeitos radioativos liquidos por consorcios bacterianos. This paper evaluates the capacity of two bacterial consortiums of impacted areas in removing the Am and Cs from liquid radioactive wastes. These results suggest that the bio removal with the selected consortiums, can be a viable technique edl the treatment of radioactive wastes containing Am and Cs Biodegradation of radioactive organic liquid waste from spent fuel reprocessing; Biodegradacao de rejeitos radioativos liquidos organicos provenientes do reprocessamento do combustivel nuclear.
The program was ended at the beginning of 90’s, and the laboratory was closed down. Part of the radioactive waste generated mainly from the analytical laboratories is stored waiting for treatment at the Waste Management Laboratory, and it is constituted by mixture of aqueous and organic phases. The most widely used technique for the treatment of radioactive liquid wastes is the solidification in cement matrix, due to the low processing costs and compatibility with a wide variety of wastes.
However, organics are generally incompatible with cement, interfering with the hydration and setting processes, and requiring pre -treatment with aduerdo additives to stabilize or destroy them.
The objective of this work can be divided in three parts: From the characterization analysis, TBP and ethyl acetate were chosen to be degraded. The results showed that selected bacterial consortia were efficient for the organic liquid wastes degradation. Directory of Open Access Journals Sweden. Control system of liquid effluents generated in treatment with I; Sistema de control de efluentes liquidos generados en el tratamiento con I In recent years, nuclear medicine has developed greatly in our country and around 0011 world.
Techniques for both medical diagnosis and therapy have increased the use of radiopharmaceuticals, notably the I In Mexico there acierdo around nuclear medicine establishments authorized by the Comision Auerdo de Seguridad Nuclear y Acueedo. Most of these establishments do not have an appropriate facility for the treatment of radioactive inpc effluents, to ensure compliance with the concentration limits established in the regulations.
This system ensures an effective compliance with regulations and also better management and control of these radioactive effluents. Calculations and design of SACEL were made with respect to I, because is one of the most commonly used in radiotherapy and medical diagnostics, besides its half-life is greater in relation to other radionuclides.
SACEL is comprised of four storage tanks and decay and a fifth tank for measuring the concentration of I and later discharge to the drain; these tanks are connected to an automated system that controls the acuerdi passage. The calculation to determine the volume of the tanks was carried out according to the demand that has the hospital, to the maximum activity being poured inpdc effluents and time required to decay. In this paper the design and installation of SACEL system, in addition to functioning as a facility that enables the Hospital meet the required standards is presented.
Dose calculations performed with MCNPX and the methodology used in the calibration of the detection system is inped presented.
Verma procedure to determine thermodynamic properties of liquids; Procedimiento Verma para determinar propiedades termodinamicas de liquidos. In this paper are presented, the thermodynamic inconsistencies in formulation IAPWS as well as the limitations in the experimental data of the thermodynamic properties of the water.
In addition, a new methodology was developed: Verma procedure for the measurement of the calorific capacity of water. Thus, a procedure is presented to calculate other thermodynamic properties of liquids such as water.
In the transformation processes of the planet Earth, water is an essential component. Nevertheless, the knowledge about its properties is still very limited. Recently, Verma developed a new program: Yet, thermodynamic inconsistencies were found in the formulation, same that are the limiting factors for the operation of the SteamTablesIIE in all the ranks of the independent variables.
Ademas, se desarrollo una nueva metodologia: