Results 1 - 10 of 70
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[en] This paper briefly examines how indigenous engagement by Australian mining companies has evolved over the past 50 years and highlights some of the negative consequences that can arise from ineffective cross-cultural consultation. A special focus is placed on uranium mining and milling and a specific engagement strategy for the Ranger Uranium Mine is discussed as a case study. From this, a more general strategic approach based on cultural recognition is proposed. Outcomes for the Ranger Uranium Mine have so far been promising, but further work is required to determine if the general strategic approach will be successful. (author)
[en] Namibia has implemented mutually-beneficial partnerships to ensure that adequate capacity exists. Voluntary product stewardship schemes have arisen out of the need for the industry to balance their pursuit of economic gain with environmental and social concerns. Industry has built on World Nuclear Association standards in developing voluntary product stewardship schemes to gain majority sector participation. (author)
[en] This paper gives World Nuclear Association (WNA) views on nuclear capacity additions to 2030 and the likely adequacy of the fuel supply chain to meet the nuclear fleet’s uranium requirements, as presented at the URAM-2014 symposium. A scenario approach is adopted resulting in three capacity projections based on the outlook for existing and new nuclear countries. Uranium resource estimations are taken from the OECD-NEA/ IAEA Red Book and the prospects for new and existing mines assessed on a site-by-site basis. Both prospective uranium requirements and primary uranium supply have decreased since the WNA’s previous 2011 report, the latter markedly so from the mid-2020s. Secondary supply is also projected and expected to remain high to 2030. (author)
[en] Water level and wind speed have important influences on radon release in particle-packing emanation media. Based on radon migration theory in porous media under three water level conditions, an experimental setup was designed to measure the surface radon exhalation rate of uranium tailings from heap leaching uranium mine at different water levels and wind speeds. When the water level was at 0.3 m (overlying depth 0.05 m), radon transfer velocities at the gas–liquid interface were also measured at different wind speeds. Results show that when the water level was equal to or lower than the surface of the sample, the radon exhalation rate increased with increasing wind speed and decreased with increasing water level. When the water level was higher than the surface of the sample, radon exhalation rate of the water surface increased with increasing surface wind speed. The wind speed, however, was less influential on the radon exhalation rate as the depth of the overlying water increased, with a dramatic decrease in radon release. That said, at different wind speeds, radon transfer velocities at the gas–liquid interface were consistent with literature. On the other hand, changes in wind speed had significant influences on the radon transfer velocity at the gas–liquid interface, with the effect less pronounced at higher wind speeds.
[en] Up until the Fukushima incident in March 2011 project activity in the uranium sector was driven by high uranium prices and merger and acquisition corporate activity. Soon after the incident, project development in the uranium sector collapsed and capital slowly dried up as uranium prices dropped. Uranium projects, like all other commodities, have a critical ‘to do list’ which is part of project feasibility and is essential to complete in order for these assets to be packaged as desirable world class projects ready for construction. This paper presents experience based on case studies from a number of recent uranium projects in Australia, Africa and Europe, either developed through to construction or at different phases of feasibility. The presentation will focus on the experience gained and the lessons learnt when managing the development of these uranium projects. Other examples will demonstrate where projects have exceeded expectations and delivered exceptional value, due to factors which are often underrated or ignored in the management of the exploration and mine development work cycle. (author)
[en] For 60 years, 250 uranium mines had been operating in France for a total production of 76.000 tons of uranium. The first mine was opened in 1948 at La Crouzille and the last mine was closed in 2001 at Jouac. At the height of their activity, some mines, like that of Bessines, could employ up to 1500 workers.The Bessines mine was closed in 1993 and the uranium processing plant (SIMO) installed on the site was decommissioned in 2001. In 2013 a museum dedicated to uranium mining was inaugurated at the Bessines site. This museum has been thought as the testimony of a humane adventure. A part of the museum is dedicated to radioactivity and its uses at the beginning of last century, another part is an immersion in mining activity and the last part is a description of ore processing till obtaining the famous yellow cake. Numerous artifacts (helmets, head-lamps, dosimeters,..) used by miners are on display. The Bessines site is also home to an important database gathering technical information on worldwide uranium exploration and to a collection of soil cores and ore samples. (A.C.)
[en] The regulation of uranium mining in Australia’s Northern Territory (NT) is a complex system controlled primarily under the NT Mining Management Act but with a number of additional processes and procedures involving the major stakeholders in a consultative manner, some of which are site specific. The process has developed over many years to the present state where it may be considered a mature and efficient system. The paper briefly updates the present state of regulation and recent developments at the Ranger Uranium Mine before describing the work under way to deal with uranium mine legacy sites in the NT. The paper also details a recent change to the legislation which is designed to fund a legacy mines unit and the proposed programme of works for that unit, including work in relation to former uranium mine sites. (author)
[en] In order to study the radon release behavior when heap leaching uranium ores with dilute sulfuric acid, unleached uranium ores from a uranium mine in southern China were selected as test samples. Adopting parameters from leaching processes commonly used in uranium mines, a laboratory experiment was carried out for 21 days with a one-dimensional acid heap leaching experimental column. The surface radon exhalation rate of uranium ore column was determined by static accumulation method while spraying with deionized water and dilute sulfuric acid. The uranium leaching rate and ore column height for all 21 days of the experiment were also measured. The results show that (1) when sprayed with a leaching agent, the surface radon exhalation rate of uranium ore column initially increased with time sharply. After a maximum value was reached, the rate gradually decreased and stabilized. When the spraying stopped, the surface radon exhalation rate of uranium ore column initially decreased, before increasing until it tended to stabilize. (2) During the entirety of the 21-day leaching experiment, the cumulative leaching rate of uranium increased gradually with time. On the other hand, the surface radon exhalation rate of uranium ore column fluctuated, but the leaching of uranium from uranium ores had almost no effect on the radon exhalation rate. (3) There was no linear correlation between the surface radon exhalation rate and the residual height of ore column during leaching, but the collapsing event of ore column was the direct inducing factor of the fluctuation of surface radon exhalation rate.
[en] Following early experimentation and production in the 1960s, in situ leach (ISL) mining has become one of the standard uranium production methods. Its application to amenable uranium deposits (in certain sedimentary formations) has been growing in view of its competitive production costs and low surface impacts. ISL uranium mining has gained widespread acceptance and its share in total uranium production grew from 13% in 1997 to 46% in 2011. The IAEA has prepared an overview report to show how ISL experience around the world can be used to direct the development of technical activities, taking into account environmental considerations and an emphasis on the economics of the process, including responsible mine closure. With this report Member States and interested parties will have more information to design and efficiently and safely regulate current and future projects, with a view to maximize economic performance and minimize negative environmental impact. Highlights of the report’s findings are provided here, with a summary of the IAEA’s involvement in ISL over recent decades and some discussion on ISL remediation issues. (author)
[en] Mining, including mining, comes at the price of environmental and social impacts. While minimizing environmental impacts with a view to comply with regulatory requirements today is a standard procedure in mine business management, this is not necessarily so the case for social impacts. On the other hand, many societies today express their desire to participate in the decision finding on the development of their physical and economic environment. A sustained and sustainable mine development requires the collaboration with the host communities concerned, which means that it has to be developed in a process commonly termed social licensing. However, a ‘social license’ will not be granted once and for ever, but in fact is an evolving process, as the communities and their needs evolve. This paper examines the evolution of social licensing in the context of various ethical dilemmas and divergent norm and value systems of the different actors, such as host communities, mining companies and society as a whole. It also argued to make social licensing an integral element of business (risk) management for mining companies. (author)