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[en] The location of a site safe and able to sequester CO2 for long periods of time is essential to gain public acceptance. This requires a long-term safety assessment developed in a robust and reliable framework. Site selection is the first step and requires specific research. This paper describes the application of the Selection and Classification Method of Geological Formations (SCF) developed to assess the potential of geological formations to CO2 storage. This assessment is based in the analysis of risks to Health, Safety and Environment (HSE) derived from potential CO2 leakage. Comparisons of the results obtained from a number of potential sites can help to select the best candidate for CO2 injection. The potential impact will be related to three key potential features of CO2 geological storage: the potential of the target geological formation for long term CO2 containment; the potential for secondary containment on containment failure of the target formation; and the site's potential to mitigate and/or disperse CO2 leakage if the primary and secondary containments fail. The methodology assesses each of these three characteristics through an analysis and assessment of properties of certain attributes of them. Uncertainty will remain as an input and output value of the methodology due to the usual lack of data in most site selection processes. The global uncertainty reports on the trust on the knowledge of the site characteristics. Therefore, the methodology enables comparing sites taking into account both the HSE risk expectation and the estimation of the quality of knowledge concerning such risk. The objective is to contribute to the selection of potential sites for a CO2 injection pilot plant in the Iberian Peninsula from the perspective of Safety and Risk Analysis.
[en] The storage of CO2 in geological formations is a promising option in the set of technological strategies to reduce the concentration of atmospheric CO2. An essential requirement for the definition and planning of CO2 injection strategies at local, national and supranational scales and to gaining public acceptance that allows the application of this technology to an industrial scale is building safe geological storages capable of sequestering CO2 during extended periods with minimal risk of leakage, i.e., annual leakage rates of CO2 less than 0.01% of the total volume stored, equivalent to a retention period 10 000 years. This report sets out the performance indicators and environmental and safety criteria to be satisfied in the long-term risk analysis and assessment of the Technological Development Plant for CO2 Geological Storage at the Hontomín site (Burgos, Spain).
[en] There are a number of nuclear installations in Indonesia such as nuclear research reactors, laboratories, irradiators and other nuclear installations but they have been aging, so it is necessary to locate new candidate sites for the construction of nuclear installations. Kulon Progo has a very interesting geological condition to be studied as an alternative candidate for nuclear installation site. The method used is geological mapping and geological structure by observing outcrop as well as geological structure data measurement. The geological structure data are further processed for microtectonic analysis. The area of investigation is divided into 3 units of rock, from old to young formation units of Monomic Breccia, Limestone, and Alluvial Deposits. No active fault was found in the investigation area. Geological structures found are shear fracture and gash fracture limestone units. Geologically, Kulon Progo is suitable as nuclear installation candidate site. (author)
[en] Agricultural land use pattern is affected by many factors at different scales and effects that are separated by time and space. This will lead to simulation models that optimize or project the cropping pattern changes and incorporate complexities in terms of details and dynamics. Combining System Dynamics (SD) and a modified Conversion of Land Use and its Effects (CLUE) modelling framework, this paper suggests a new dynamic approach for assessing the demand of different crops at country-level and for predicting the spatial distribution of cultivated areas at provincial scale. As example, a case study is presented for Iran, where we have simulated a scenario of future cropping pattern changes during 2015–2040.The results indicated a change in the spatial distribution of cultivated areas during the next years. An increase in the proportion of rice is expected in northern Iran, whereas the proportion of wheat is increasing in the mountainous western areas. Wheat and barley crops are expected to become dominant within the cropping system throughout the country regions.
[en] Meteorology's knowledge has crucial role in regards of nuclear installation safety. Meteorology events such as extreme wind, tropical cyclone , lighting, extreme temperature and humidity also high rainfall causing flood can induce danger that will affect the nuclear installation's safety. The study of siting characteristic for meteorology aspect is use to gain data to be used as basic parameter reactor's in the design and construction purposes in Serpong. The method of this study used data provided by applicant from onsite and offsite measurement. Meteorology data and information review and collected are divided into two section covers meteorological extreme value parameter (pressure, temperature, air humidity, rainfall rate, wind speed, and lighting frequency and density) and extreme weather phenomena (tropical cyclone (storm), waterspouts, tide surge due to storm, and wind wave). Applicants data then were evaluated based on Nuclear Energy Regulatory Agency Chairman Regulation Number 6 Year 2014 On Nuclear Installation Site Evaluation For Meteorological And Hydrological Aspects, international standard from other countries nuclear regulatory agency, regulation/standard from meteorological agency in Indonesia and abroad, also expert recommendation. The study result shows that the maximum for wind speed and precipitation are 48,2 m/s and 296 mm/day, tropical cyclone from storms is categorized as EF-1 scale, also relatively high Number Flash to Ground, respectively. Site are safe from hazards of tropical cyclone, waterspouts, tide surge due to storm, and wind wave, also missile due to tropical cyclone. (author)
[en] In the past, there have been attempts and studies on eliminating soluble boric acid in small modular reactors (SMRs). Soluble boron-free concepts can eliminate boric-acid-induced corrosion and simplify the large components related to Chemical and Volume Control System (CVCS). This paper attempts to understand jamming phenomena and quantify its probability in terms of various physical variables based on experiment and simulation. In this paper, we have performed analysis on the jamming phenomenon of the granular system of monodisperse balls in 3D hoppers to validate the ball-type SSS for soluble boron free small modular reactor. We showed that DEM can be effective in interpreting this SSS through comparison with previous well-known experimental results. Moreover, we compared with our own experiment results to verify the DEM simulation results. As further works, the following tasks are on-going and will be performed. (1) We are undergoing a theoretical interpretation to understand the Jamming phenomenon. (2) We will perform a comparison of the experiment and the simulation under more various conditions through more experiments.
[en] The exceeding ASI may lead to power decreasing, which may reduce the utilization rate of the plant. In order to effectively control the Xenon oscillation due to the power change, it is necessary to expand the LCO of ASI range at the low power to improve the ease of load-follow operation. And it is necessary to reduce the ASI range at the high power to secure safety analysis margin. In this paper, sensitivity study results for safety analysis margins were described assuming various ASI ranges to determine the optimal LCO of ASI range. As a results of sensitivity study, the ROPM decreased due to reduction of ASI operating range at the full power condition. At the low power condition, the ROPM increased with ASI operating range expansion, but it was within the normal ROPM value. For the peak pressure according to ASI operating range, the peak pressure of RCS increased with extending ASI operating range, but it was assessed to meet the acceptance criteria. The peak pressure of secondary system was found to have no significant effect on the ASI operating range. In conclusion, the extended ASI operating range worsened some safety analysis results, but the results were met the acceptance criteria. The extended ASI operating range is expected that the efficiency of plant operation for the load-follow.
[en] In a context where decommissioning activities are becoming more and more strategic for the nuclear sector, data information management is of prior interest, especially due to its particular complexity. The main challenge is to ensure the access to the right information at the right time to the right person, in order to provide a consistent basis to the decision support framework. Such information must be well storage, managed and controlled, meaning that the user has to be aware of the level of maturity and uncertainty attached to such information to complete our mastery of nuclear-based energy all along its life-cycle. In order to answer these needs, a PLM (product life-cycle management) approach is proposed and experimented as information backbone for the decommissioning activity and support of the whole process design. (authors)
[en] No two days are the same when on the job as a decommissioning manager. Nuclear facilities come in all shapes and sizes, and with each facility having its own unique design, decommissioners have to develop highly detailed and tailored plans and often create new, innovative solutions for safely dismantling a facility piece by piece.