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[en] This international EIA involved all neighbouring countries. competent authorities and bodes and the wide public. International consultation and public debates were held and the project was subjected to an external review. In August 2019 the Environment Ministry issued its affirmative decision with a number of conditions and requirements for the preparatory stage, construction stage and operational stage, including constant environmental monitoring and ongoing assessment of the environmental effects. Details can be found on https://portal.cenia.cz/eiasea/ detail/EIAMZP469.
[en] This comprehensive report published by the Swiss Nuclear Safety Inspectorate ENSI reviews the safety-relevant requirements placed on phase 3 of the sectorial plan. It discusses the requirements placed on the documentation concerning the application for general approval as well as requirements placed on the geoscientific analyses to be made. Safety-relevant factors for the proposed repository sites are discussed and compared. Further requirements placed on a site once it has been chosen and implemented are noted. The report concludes with a glossary and references.
[en] This report issued by the Swiss Nuclear Safety Inspectorate ENSI presents a review of factors concerned with the storage of nuclear wastes. Legal requirements are examined and the terminology used is defined. Procedural methods and documentation are discussed, as are the responsibilities involved. Current status and external developments are looked at and relevant storage components and their aging are discussed and analyzed. The organization required is looked at. Transportability of the wastes and their aptitude with respect to their intermediate storage are discussed.
[en] Rare earth ore, zircon ore, tantalum and niobium ores and vanadium ore, etc. usually coexist with uranium, thorium and other radioactive elements. Especially, radioactive waste residue generated from the smelting process of monazite, tantalum niobium ore has high specific activity, large quantity and wide geographical characteristics. In fact, they have radiation environment safety problem. Under the investigation and survey some smelting process of rare earth, tantalum and niobium enterprises in Jiangxi and Guangdong provinces, with the support by national policy and application of up to date technology, to establish regionally centralized disposal of radioactive waste and to comprehensively recover valuable elements are proposed in this paper for achieving industry standard management, waste reduction, resource utilization, harmlessness and centralization management. (authors)
[en] This comprehensive document issued by the Swiss Nuclear Safety Inspectorate ENSI in October 2020 reports on its activities in accordance with Article 32 of the Joint Convention on the Safety of Spent Fuel and Radioactive Waste Management. The report is composed of ten Sections. An introduction presents basic information and an overview. Further sections cover aspects such as polices and practices, scope of application, inventories and lists, legislative and regulatory system, general safety provisions, safety of spent fuel management, safety of radioactive waste management, transboundary movement and disused sealed sources. Finally, general efforts to improve safety are discussed. Two Annexes complete the report.
[en] The Swiss Federal Nuclear Safety Inspectorate (ENSI) is in charge of reviewing the work developed by the National Cooperative for the Disposal of Radioactive Waste (NAGRA) in Switzerland. Within the context of the Opalinus Clay project, the performance and safety assessment exercise developed by NAGRA involved the derivation of Biosphere Dose Conversion Factors (BDCF). The objective is the derivation of BDCF by using an alternative modelling tool and the study of how several simplifications incorporated to the model can affect the results. It constitutes the basis of an expanded study aiming at developing ENSI's biosphere modelling capabilities, including the selection of a suitable computer program for biosphere transport and dose calculations alternative to the one used by NAGRA. The compartmental code AMBER has been used to obtain the values of the BDCF, in contrast to the code Tame used in the assessment of NAGRA. The results obtained agree with the ones reported by NAGRA. The project has been divided into four sections dealing with (1) the description of the conceptual model and its implementation in AMBER, (2) the comparison between BDCF results obtained by NAGRA and the ones derived in this study, (3) sensitivity analyses of the results versus different exposure pathways and contamination paths and (4) the comparison of the BDCF resulting from the reference model with the ones obtained by other biosphere approaches carried out by different national radioactive waste management agencies. Twelve radionuclides have been included in the analyses: four non-metallic elements (14C, 36Cl, 79Se, 129I) and 8 metallic elements that are part of the decay chain of 246Cm (242Pu, 238U, 234U, 230Th, 226Ra, 210Pb, 210Po). Ingestion is the pathway contributing most to the total received dose for an individual. Two general trends can be distinguished between metallic and non-metallic elements: metallic elements present high sorption coefficients, resulting in higher concentration in the top-soil and bed sediments, while non-metallic elements are more concentrated in the local aquifer and surface water. Ingestion of milk provides a good example to study this distinctive behaviour. Soil consumption and pasture consumption contaminated by root uptake are the main mechanisms of milk contamination in the case of metallic elements, while drinking water and consumption of pasture contaminated by irrigation are the ones dominating for non-metallic elements. The elimination of the solid material fluxes in the model results in calculated BDCF higher than the ones of the reference case. A comparison has been done between the model implemented and the approaches followed by different radioactive waste management agencies. The following three aspects of the comparison and sensitivity analyses exercise can be highlighted: 1) The model implemented in TAME by NAGRA is transportable to the AMBER code, the results do not depend on the numerical code used; 2) The sensitivity analyses have shown that ingestion is the main contributor to the dose, and that the exposure pathways through fish and eggs can be neglected; 3) For most of the metallic radionuclides, BDCF up to 3 times larger are obtained if solid material fluxes are neglected. This highlights the relevance of accurately describing the association of radionuclides with solid material as well as the adequacy of selecting an appropriate set of data to describe solid/radionuclide interactions.
[en] Beside a synthesis note presenting the application for the declaration of public interest of the Cigeo project, several documents are proposed: a non technical presentation of the storage centre, an explication note, a master map, work planning, main characteristics of the most important works, brief assessment of expenses, an impact study for the whole project in several volumes (justification and description of the global project, justification and description of the global project, present situation of the environment and factors possibly affected by the project, assessment of impacts and measures to avoid, reduce and compensate these impacts, assessment of impacts on Natura 2000 sites, methods of realisation), legal and administrative information, opinion on the Cigeo storage centre project, assessment of public participation to the project elaboration, deliberation of the Board of Trustees, modalities of restoration of suspended ways, setting the compatibility with the different concerned town planning documents, economic and social assessment of transport infrastructures of the global Cigeo project, synthesis of the territory planning and development perspectives.