The 13th International Conference on Environmental ... - Events

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Abstracts the appropriate value of natural radioactivity. <strong>The</strong> law on decommission work was established later, however there is still no suitable quantitative criteria to distinguish uranium contaminated material or not. MMC’s criteria was considered as very low, which was close to natural radioactivity. In other words, the facility was decommissioned under very safely manner. <strong>The</strong> wastes generated from the decommission work are being held in storehouse build in the same area. 3) 40210 – Photo-Catalytic Degradation of Industrial Pollutant by Using Nano-technology and Solar energy in the Eastern Area of Kingdom of Saudi Arabia Osama S.Y. Mohamed, Abdullah A. Al Jaafari, King Faisal University (Saudi Arabia) <strong>The</strong> nano-material is one of the most dynamic and fastest growing areas of research in the fields of science, engineering, and medicine. Also, in Saudi Arabia, the sun light is available in all year. In the same time, Marine and fresh waters can be considered, at present, to consist of a complex mixture of dissolved and non dissolved organic materials as well as biological substrates and colloidal aggregates. Following this line, we prepared nano-particles of zinc oxide inside Pressurized vessel with temperature controller unit and dried under supercritical conditions in presence of ethanol. <strong>The</strong>se nanoparticles have used as photocatalyst in order to destroy colored dye pollutant (Acid green 1) in the presence of sun light. In the same trend, we developed zinc oxide nano-particles by doping with aluminum oxide in order to increase the efficiency of its visible photo-catalytic activity. <strong>The</strong> experimental results showed that the doped and undoped zinc oxide nanoparticles are very active for catalytic degradations of pollutants in presence of sun light. 4) 40224 – Hydrogen Production from a PV/PEM Electrolyzer System Using a Neural-Network-Based MPPT Algorithm Abd El-Shafy Nafeh, Electronics Research Institute (Egypt) <strong>The</strong> electrolysis of water using a polymer electrolyte membrane (PEM) electrolyzer is a very vital and efficient method of producing hydrogen (H2). <strong>The</strong> performance of this method can be significantly improved if a photovoltaic (PV) array, with maximum-power-point (MPP) tracker, is utilized as an energy source for the electrolyzer. This paper suggests a stand-alone PV/PEM electrolyzer system to produce pure hydrogen. <strong>The</strong> paper also develops the different mathematical models for each constituent subsystem. Moreover, the paper develops the suitable maximum-power-point tracking algorithm that is based upon utilizing the neural network. This algorithm is utilized together with the action of the PI controller to improve the performance of the suggested stand-alone PV/PEM electrolyzer system through maximizing the hydrogen production rate for every instant. Finally, the suggested hydrogen production system is simulated using the Matlab/Simulink and neural network toolbox. <strong>The</strong> simulation results of the system indicate the improved relative performance of the suggested hydrogen production system compared with the traditional case of direct connection between the PV array and the PEM electrolyzer. 5) 40301 – Cement based solidification / stabilization of industrial contaminated soil using various cement additives Grega E. Voglar, RDA (Slovenia); D. Lestan, Agronomy Department, Biotechnical Faculty, University of Ljubljana, (Slovenia) A large number of industrial activities produce wastes and contaminants that reach the soil through direct disposal, emissions, spills, leaks and other pathways. An increasing number of abandoned industrial sites (brownfields) have emerged as a result of weak environmental regulation over decades. Soil clean-up operations (remediations) of brownfields, followed by redevelopment is essential to lower the urbanization pressure on arable and other farmland (greenfields). <strong>The</strong> town of Celje in central Slovenia has a long tradition of metallurgical and chemical industries, which started in 1874 with a zinc smelter and was subsequently expanded to the production of Zn and Pb oxides and Ba salts. In 1912, the synthesis of H2SO4 and in 1970 the production of TiO2 started. Obsolete manufacturing plants have gradually been closed and replaced with new ones in a new location. <strong>The</strong> whole industrial site of “old Cinkarna” was finally demolished in 2003, leaving a brownfield area of some 170,000 m2 very close to the city centre and with highly contaminated soils, primarily with potentially toxic metals and metaloides (PTMs) and to some extend also with organic pollutants. In a laboratory study, 15% (w/w) of ordinary portland cement (OPC), black portland cement (BPC) and puculanic cement (PC) combined with various cement additives were used for solidification / stabilization (S/S) of Cd, Pb, Zn, Cu, Ni and As contaminated soils from the former industrial site. Soils formed solid monoliths with all cements. S/S effectiveness was assessed by measuring the mechanical strength of the monoliths, concentrations of metals in deionised water and TCLP (Toxicity Characteristic Leaching Procedure) soil extracts, and mass transfer of metals. Concentrations of Cd, Pb, Zn and Ni in water extracts from S/S soils generally decreased, while concentrations of As and Cu increased. Concentrations of Cd, Pb, Zn, Cu and Ni in the TCLP extracts from S/S soils were lower than from original soils, while the extractability of As from S/S soils increased. Overall, the concentration of metals in deionised water and TCLP solution, obtained after extraction of the S/S soils, was below the regulatory limits. S/S greatly reduced the mass transfer of Cd (up to 300-times), Pb (up to 53.7-times) and Zn (up to 3843-times). Mass transfer of Ni was generally also reduced, while that of Cu and As increased in some S/S soils. Based on the findings of mass-transfer mechanism analysis the predominant mechanism of release was surface wash-off of metals otherwise physically encapsulated within the cementous soil matrix. 116
Abstracts SESSION M3: EM/PI Poster 1) 40099 – Removal of Fluorine and Boron from Groundwater Using Radiation-induced Graft Polymerization Adsorbent at Mizunami Underground Research Laboratory Yosuke Iyatomi, Hiroyuki Hoshina, Noriaki Seko, Noboru Kasai, Yuji Ueki, Masao Tamada, JAEA (Japan) High fluorine and boron contents in groundwater are commonly reduced using coagulation and ion-exchange treatments. As an alternative, we tested the efficiency of fluorine and boron removal from groundwater using radiationinduced graft polymerization adsorbent. <strong>The</strong> durability of the adsorbent was also determined by varying groundwater flowthrough rates and repetitive use of the adsorbent. <strong>The</strong> results indicated that it was possible for the adsorbent to remove more than 95% of boron and fluorine from the groundwater, and that the performance of the adsorbent for boron removal was better than commonly used ion-exchange resin. <strong>The</strong> adsorbent used several times was able to remove boron, indicating that the adsorbent can be used for efficient boron removal. 2) 40184 – <strong>The</strong> Optimized Risk Management of the Waste from NORM and Nuclear Industries - How to Harmonize Risk from Various Sources Yoko Fujikawa, Kyoto University Research Reactor Institute (Japan); Michikuni Shimo, Fujita Health University (Japan); Hidenori Yonehara, National Instuitute of Radiological Sciences (Japan); Tadashi Tujimoto, Electron Science Institute (Japan) We compared the existing regulation on management of radioactive and non-radioactive wastes with the ideal legislation procedures for protection of environment. <strong>The</strong> comparison revealed the necessity of risk-based regulation, consideration for ethics and cost-effectiveness of the regulation, and optimal usage of regulation resources. In order to assess the cost-effectiveness of several different waste disposal options, the concept of disposal cost per unit radiotoxicity (mSv or m3) in waste (CPR hereafter) was introduced and calculated. <strong>The</strong> results revealed that current disposal option of high level radioactive waste (underground burial) was more cost-effective than that of TENORM and asbestos containing waste. 3) 40205 – Exposure Dose Evaluation of Worker at Radioactive Waste Incineration Facility on KEARI Sang Kyu Park, Jong Seon Jeon, Younhwa Kim, Jaemin Lee, NESYS.CO., LTD. (Korea Rep.); Ki Won Lee, KAERI, (Korea Rep.) In this study, we evaluate the exposure dose of worker by operating at radioactive waste incineration facility that is in KAERI(Korea Atomic Energy Research Institute) for safety analysis. <strong>The</strong> incineration facility that is areas are 570 ?, annual treatment quantities are 40,000 kg is separated with radiation zone and non-radiation area to installed extra equipment for incineration process. <strong>The</strong> incineration facility consist of preparing system, incineration processing system, exhaust gas treatment system, ash treatment system and controlled with measurement. Radioactive waste incineration facility during normal operation, worker is exposured radiation by the exposure route of external and internal. <strong>The</strong>y are exposured by external radiation that was effected by treated waste material and characteristic. In case of internal exposure, it is primary fact that is inhalation of contaminated air. <strong>The</strong> evaluation assumption is the next: One is that internal exposure is concentration of radioactive material release basis and work is 200 days per year(8 hr per day) because of the incineration facility is operated and managed in critical regulation under maximum acceptance air contamination. Result of evaluation, maximum exposure dose is 3.07 mSy/y and internal exposure dose is 2.5 mSy/yr according as selecting the treated radioacitve waste. <strong>The</strong> exposure dose of assessment result is lower the basis of domestic nuclear law and regulation limit in IAEA. 4) 40209 – Scenario Development for Safety Assessment of Waste Repository for Feasibility Study on Transmutation of Spent Nuclear Fuel into LILW using PEACER Sung-yeop Kim, Kun Jai Lee, KAIST (Korea Rep.) Safety assessment of radioactive waste repository is necessary for feasibility study on transmutation of spent nuclear fuel into LILW(Low and Intermediate Level Waste) using transmutation reactor PEACER(Proliferation-resistant, Environmental-friendly, Accident-tolerant, Continuable-energy and Economical Reactor). PEACER is a conceptual liquid metal fast reactor using Pb-Bi as a coolant. Scenario development is important to the safety assessment for several reasons. Scenarios provide the context in which safety assessments are performed. Scenarios influence model development and data collection efforts. <strong>The</strong>y have become a very important aspect of confidence building for the post-closure safety assessment. In this study, condition of medium depth disposal about 100-200m in granite is considered. Waste from PWR and PEACER considering DF(Decontamination Factor) is disposed in this condition. Scenario for these concepts are established by screening FEP(Feature, Event, Process) database and benchmarking reference safety assessment report. 117
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FINAL PROGRAM The
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General Information Objectives and
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Insurance and Liability All partici
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Map around Conference</stro
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ICEM2010 Technical Sessions at a Gl
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ICEM2010 Technical Sessions at a Gl
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Sphiee Robert, Benoit Carpentier, S
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concept for disposal of HLW Lou Are
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