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Lessons learnt from decommissioning of more than fifty facilities in Germany

机译:从德国五十多个设施的退役中吸取的教训

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In Germany a broad range of facility types are actually being decommissioned. The variety offacilities includes SUR-100 educational reactors (to be dismantled within some days) as well as commercialpower plants, lab-based pilot plants for fuel reprocessing and commercial fuel element manufacturing plants.The actual decommissioning and dismantling projects comprise 19 power and prototype reactors, 33 researchreactors and 11 fuel cycle facilities which are being or have been decommissioned. The lack of a facility for thedisposal of decommissioning waste lead to a reduction of disposal volume for waste with negligible heatgeneration. Compared to the derived disposal volume for reference reactors in the nineties, actualdecommissioning projects will lead to slightly reduced waste volumes. This is achieved by improved compactionand packaging technologies as well as improvements in pre-dismantling sampling and measurements, the latterleading to more precise nuclide vectors and thus a better separation of materials for clearance. It has been shownthat the German regulatory framework is applicable to any type of nuclear facilities located in Germany,however, nuclear facility-specific boundary conditions have to be taken into consideration, such as specificnuclide vectors;contaminations of systems, buildings, soil and groundwater;limitations in space and others. Thisincludes radiation protection measures, clearance options and dismantling technologies as well as wasteconditioning and interim storage.
机译:在德国,实际上已经淘汰了各种设施。多种 设施包括SUR-100教育反应堆(将在几天之内拆除)以及商用 发电厂,基于实验室的燃料后处理中试工厂和商用燃料元件制造工厂。 实际的退役和拆除项目包括19座动力和原型反应堆,33项研究 已经或已经退役的反应堆和11个燃料循环设施。缺乏设施 退役废物的处置导致热量可忽略的废物处置量的减少 一代。与90年代参考反应堆的推算处置量相比,实际 退役项目将导致废物量略有减少。这是通过改善压实度来实现的 和包装技术,以及在拆卸前采样和测量方面的改进,后者 导致更精确的核素矢量,从而更好地分离了用于清除的物质。已经显示 德国的监管框架适用于位于德国的任何类型的核设施, 但是,必须考虑特定于核设施的边界条件,例如特定的 核素载体;系统,建筑物,土壤和地下水的污染;空间和其他方面的限制。这 包括辐射防护措施,清除选项和拆除技术以及废物 调节和临时存储。

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