共查询到19条相似文献,搜索用时 109 毫秒
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根据不同介质中氡迁移的不同机制,本文作者研究了一种新的铀矿勘探钻孔测井技术。这种新技术参照了其他钻孔测井方法,其优点是:有可能找到钻孔所需深度的答案.在空气和水中,氡迁移的2种形式一直被用来测定氡分布。对这2种研究的形式开发了计算机程序,以期从理论上对氡径迹密度(作为钻孔深度的一个函数)进行计算。本文将理论上与实际上所获得的数据进行了比较. 相似文献
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矿体厚度是矿产储量计算中最主要的参数,以往都是根据钻孔测斜资料,采用制图人工操作的方法求得,方法繁杂费劲。本文介绍一种确定矿体厚度的新方法,它是建立在解析几何的基础上,设计了专用的程序包,通过上机计算完成,实现了确定矿体厚度的自动化。 相似文献
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首先简述国外高放废物(HLW)处置研发工作的现状,然后论述HLW分类处置的概念,研讨影响军用HLW分类处置方案选择的一些因素,以及简介其分类处置的3个方案。这样,把以前不分HLW来源(商用或军用)都处置在同一矿山式处置库中的方案作了细化,推进了HLW处置研发工作的发展。但其中的深钻孔处置方案,现还处于可行性研究阶段,要得到实际应用,今后还有许多工作要做。上述军用HLW分类处置方案的建议是美国蓝带委员会于2012年首先提出的,它对我国的高放废物处置工作也有参考价值。 相似文献
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[欧洲核学会《核新闻网》1994年2月7日报道] 在芬兰的奥尔基洛托VLJ低、中放废物处置库,人们正在试验可用于乏燃料(高放废物)的地下最终处置的钻孔技术。 试验内容包括在地面下约60米深的研究隧道内,穿透基岩打三个孔。这项工作是由运营该处置库的芬兰国家工业动力公司 相似文献
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Deep (4-5 km) boreholes are emerging as a safe, secure, environmentally sound and potentially cost-effective option for disposal of high-level radioactive wastes, including plutonium. One reason this option has not been widely accepted for spent fuel is because stacking the containers in a borehole could create load stresses threatening their integrity with potential for releasing highly mobile radionuclides like 129I before the borehole is filled and sealed. This problem can be overcome by using novel high-density support matrices deployed as fine metal shot along with the containers. Temperature distributions in and around the disposal are modelled to show how decay heat from the fuel can melt the shot within weeks of disposal to give a dense liquid in which the containers are almost weightless. Finally, within a few decades, this liquid will cool and solidify, entombing the waste containers in a base metal sarcophagus sealed into the host rock. 相似文献
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Deep borehole disposal (DBD) is being increasingly seen as a viable and potentially superior alternative to comparatively shallow mined repository concepts for disposal of some high-level radioactive wastes. We report here details of proof-of-concept investigations into the use of cementitious grouts as sealing/support matrices for use in low temperature DBD scenarios. Using the cementitious grout to fill annular space within the disposal zone will not only support waste packages during placement, but will also provide a low permeability layer around them which will ultimately enhance the safety case for DBD. Grouts based on Class G oil well cement are being developed. The use of retarders to delay the accelerated onset of thickening and setting (caused by the high temperature and pressure in the borehole) is being investigated experimentally. Sodium gluconate and a polycarboxylate additive each provide sufficient retardation over the range 90–140 °C in order to be considered for this application. Phosphonate and sulphonate additives provide desirable retardation at 90 °C. The additives did not affect grout composition at 14 days curing and the phases formed are durable at elevated temperature and pressure. 相似文献
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主要介绍了法国COGEMA集团核废物处理技术,即放射性环境影响、废物控制、空气中放射性含量的监测、水质的监测和保护、土地的恢复和开发等,以及对每一项工作所采取的措施;评价了该集团核废物处理中心的环境保护工作及其经验,以此借鉴国外有关核废物处理和环境保护的先进技术。 相似文献
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Arnulf Matting 《Nuclear Engineering and Design》1997,176(1-2)
In Germany, all radioactive materials are controlled from their origin to their final disposal or release. This is in accordance with the IAEA draft Convention on the Safety of Radioactive Waste Management. A Waste Control System has been developed and is now available. Although the IAEA and EU regulations allow disposal outside the country of origin this philosophy is not in compliance with the present German disposal concept. As a consequence, Germany will not grant licences for the import of radioactive waste for final disposal or for export for disposal in a foreign country. Thus, unconditional clearance is a prerequisite if the final destination is outside Germany. However, Germany will closely follow all international developments in the field of radioactive waste disposal. 相似文献
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