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Collaborating Authors
Site Characterization for the Beishan Underground Research Laboratory for Geological Disposal of High-Level Radioactive Waste in China
Wang, J. (Beijing Research Institute of Uranium Geology) | Su, R. (Beijing Research Institute of Uranium Geology) | Zhao, X. G. (Beijing Research Institute of Uranium Geology) | Chen, L. (Beijing Research Institute of Uranium Geology) | Zhao, H. G. (Beijing Research Institute of Uranium Geology)
Abstract deep geological disposal is internationally accepted as a feasible approach to dispose of high-level radioactive waste (hlw), and underground research laboratories (urls) play an important role in the development of hlw repositories. The beishan area in gansu province of northwestern china is the first priority area for china's hlw repository. The xinchang site in the beishan area has been determined as the final site for hosting china's first url for hlw disposal. In the past few years, comprehensive investigations such as borehole drilling, geophysical surveying, hydraulic testing and in-situ stress measurements have been conducted to characterize the xinchang site. The results indicate that the geological, hydrogeological and engineering geological conditions of the xinchang site are very suitable for url construction. The achievements obtained from site characterization provide necessary conditions for url design. 1 Introduction Safe disposal of high-level radioactive waste (HLW) is a challenging engineering task for the sustainable development of nuclear energy and environmental protection. Geological disposal is considered to be a safe and feasible option for the long-term management of HLW worldwide, and many countries have considered building deep geological repositories (DGRs) in which to dispose of HLW generated from nuclear power plants and other nuclear facilities. Formations in several rock types such as granite, clay, rock salt, and volcanic tuff are considered suitable for the construction of DGRs (Ahn & Apted 2010). To investigate the suitability of rock formations for hosting DGRs, to develop disposal technologies, and finally to assess and demonstrate the long-term performance and safety of DGRs, many underground research laboratories (URLs) have been constructed around the world (Hudson 2010, Kickmaier & McKinley 1997). Site selection for China's HLW repository started in 1985 (Wang 2010). The efforts have been focused on potential HLW repository sites located within granite intrusions in mainland China. The attention on granitic rocks as potential host rocks was largely driven by the widespread occurrence of such rocks in China, coupled with the fact that granitic rocks can provide a suitable host environment for DGRs. Since 1999, the Beijing Research Institute of Uranium Geology (BRIUG) has performed site characterization studies in the Beishan area in Gansu Province of northwestern China. So far, the Beishan area has been selected as the first priority area for China's DGR (Wang 2014). To further push the development of the DGR, China plans to build a URL for HLW disposal around 2020. With suitable geological conditions and especially with the support of government authorities, the Xinchang site in the Beishan area has been selected as the final site for China's first URL built in granite. During characterization of the Xinchang URL site, comprehensive activities have been performed to investigate rock types, geological structures, and hydrogeological, and engineering geological conditions of the URL site, to establish a 3D geological model, and finally to provide necessary data for URL design. This paper briefly introduces the main findings obtained from the URL site characterization.
- Geology > Geological Subdiscipline > Geomechanics (1.00)
- Geology > Rock Type > Igneous Rock > Granite (0.99)
- Reservoir Description and Dynamics > Reservoir Characterization > Reservoir geomechanics (1.00)
- Health, Safety, Environment & Sustainability > Environment > Naturally occurring radioactive materials (1.00)
- Reservoir Description and Dynamics > Reservoir Characterization > Exploration, development, structural geology (0.95)
- Health, Safety, Environment & Sustainability > Environment > Waste management (0.93)
Application on Technology of Detecting Groundwater Seepage Field in Preselected Area for High-Level Radioactive Waste Disposal
Fan, Jing (School of Earth Sciences and Engineering, Nanjing University) | Li, Xiaozhao (School of Earth Sciences and Engineering, Nanjing University Sino Probe Center, Chinese Academy of Geological Sciences) | Du, Guoping (Nanjing Emperor-dam Engineering Technology Co. LTD) | Wang, Ju (CNNC Beijing Research Institute of Uranium Geology)
Abstract The safe disposal of high-level radioactive waste has always been an important and urgent concern at home and abroad. As time goes by, radionuclide may migrate with groundwater through the cracks of rock mass, causing certain harm to the environment in the vicinity of the disposal site. Therefore, how to distinguish and monitor the groundwater flow field in this context becomes a research hotspot. At present, the hydrogeological test methods for monitoring groundwater seepage field are mature and classified, but the techniques for evaluating underground flow field in hard, low-permeability granite with closed cracks are especially scarce. In this paper, velocity vector tester of three-dimensional sonar was used in typical boreholes within about 100m depth in candidate sites of Beishan, Gansu. Detection precision of the seepage velocity is nearly 10m/s, margin of seepage direction error is in 0โผ2ยฐ. Based on the verification and comparison of the hydrological, geological, environmental and engineering data obtained from boreholes, this new technology proves to be highly accurate, scientific and feasible, and may provide technical reference and guidance for the detection of underground seepage field in the preselected area for high-level radioactive waste disposal. 1 Introduction Hydrogeology investigation is a very important research field in the process of site selection of highlevel radioactive waste disposal repository. As time goes on, groundwater will bring the erosion and damage to the engineering barrier after waste disposal repository has been closed and groundwater is saturated. Radionuclides will eventually dissolve in the groundwater and migrate through the geological sphere to the biosphere. Therefore, it can be seen that the seepage field plays an important role in influencing and controlling the process of nuclide returning to the biosphere. Hydrogeological test methods for detecting groundwater flow velocity and direction at home and abroad are classified. Among them, it has been relatively mature to use isotope tracer technology to obtain flow velocity and direction of groundwater. Some researchers use isotope tracer technique to detect the parameters of groundwater, such as the flow rate, vertical flow and direction (Jiansheng Chen, et al, 2001. Hamed Y, et al, 2014. Guoping DU, et al, 1996. Zhengxia GAO, et al, 2003. Hongwei REN, et al, 2013). In addition, other researchers use hydro-geophysical methods to determine the flow rate and direction of groundwater, and also verified its feasibility through hydrogeological data (Glass R J, et al, 1991. Guangfu BAO, 2008. Xianping GU, et al, 2010). Besides, there are other methods to detect the flow direction of groundwater flow (Jinglong FAN, et al, 2009).
- Water & Waste Management > Solid Waste Management (1.00)
- Energy > Power Industry > Utilities > Nuclear (1.00)
- Energy > Oil & Gas > Upstream (0.94)
- North America > Canada > Alberta > Mountain Field > Amoco Chiefco A-1 Sterco 16-25-47-21 Well (0.98)
- Europe > United Kingdom > England > London Basin (0.91)
During the evaluation, SWPB geophysicists noted high levels of converted wave energy on the shot records of legacy datasets. Impedance of sands and shales are very similar in the In partnership with ION, SWPB modeled improvements that Xinchang field in the western Sichuan Basin of China and full-wave (multi-component) imaging techniques might provide conventional 3D P-wave seismic data was insufficient to and determined that recording converted wave energy could discriminate lithology, image fracture zones, or correlate improve the bandwidth of the entire seismic dataset. Given an with productive areas.
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Mudrock > Shale (0.56)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock > Sandstone (0.50)
- Geophysics > Seismic Surveying > Surface Seismic Acquisition (0.95)
- Geophysics > Seismic Surveying > Seismic Processing (0.72)
- Asia > China > Sichuan > Sichuan Basin > Xujiahe Formation (0.99)
- Asia > China > Sichuan > Sichuan Basin > Xinchang Field (0.99)
- Oceania > Papua New Guinea > Papuan Peninsula > Central Province > National Capital District > Petroleum Retention License 15 > Pโnyang Field (0.97)
- (11 more...)
The deep-gas reservoirs of China's western Sichuan Basin are in Members 2 and 4 of the Upper Triassic Xujiahe Formation. These reservoirs contain mid- to large-sized gas fields like Xinchang, Hexingchang, Qiongxi, Zhongba, and Bajiaochang. The favorable geological conditions for creating these fields include abundant source rock, well-developed reservoir rock, good preservation conditions, and structural traps.
- Geology > Geological Subdiscipline (1.00)
- Geology > Rock Type > Sedimentary Rock > Clastic Rock (0.71)
- North America > Canada > Saskatchewan > Williston Basin > Weyburn Field > Mission Canyon Formation (0.99)
- North America > Canada > Saskatchewan > Williston Basin > Weyburn Field > Madison Formation (0.99)
- North America > Canada > Saskatchewan > Williston Basin > Weyburn Field > Forbisher Formation (0.99)
- (5 more...)
A Proposal of the Design Consideration in Construction and Operation of Direct Nuclear Waste Disposal Facilities
Hayashi, Hisashi (Yamaguchi University) | Nishiuchi, Mizuki (National Institute of Technology) | Kanazawa, Shinichi (National Institute of Technology) | Ishiyama, Koji (Nishimatsu Construction) | Morimoto, Shingo (Yamaguchi University) | Shinji, Masato (Yamaguchi University)
Abstract The glass solidified body reprocessed by the high level nuclear waste disposal in the process of nuclear fuel recycle was the final design condition to construct the underground disposal tunnel under the over 300m depth in Japan. The design methodology and construction technique of underground facilities had been discussed. However, there has been 17,000 tons of spent nuclear fuel rods kept by the nuclear power plants at poresent. It is necessary to develop the research of the construction method of direct disposal of the spent nuclear fuel rod. In the direct waste disposal facilities, it is assumed to become tunnel section bigger because of workability of construction and operation and closing when consider with underground disposal facilities. Also, the dynamic influence of tunnel invert may be bigger when the waste transport and movement system operated because the weight of spent nuclear fuel rod is bigger than the glass solidified body. Therefore, this study is performed about a dynamic stability of direct waste disposal facilities, during tunnel excavation, the influence of the ground specialty during excavation and the influence of the load from transport and movement system to tunnel invert. This study applied 2D and 3D numerical analysis. 1. Introduction The process of deep geological disposal of high-level nuclear radioactive waste reproducted by nuclear power plant is main disposal method in Japan. According to the report titled "The second progress report on research and development for the geological disposal of High Level Waste in Japan", a basic idea of geological disposal is called "multiple barrier system". In this system, waste liquid generated in the process of nuclear fuel recycle is fixed as the vitrification. The vitrified solid is covered with isolation material in the pit of disposal tunnel located deep underground. The geological disposal facility consists of vertical shafts, disposal tunnel and disposal pits. The design of this facility needs to consider the economic efficiency and the workability at each stage of operation on construction, operation and closure. In the design of a disposal tunnel where waste is transported and stored, there are three factors of design mechanical stability, workability of construction, operation, backfilling and economy. Then, the optimum sectional shape is proposed for the tunnel of the geological disposal facility.
- Water & Waste Management > Solid Waste Management (1.00)
- Energy > Power Industry > Utilities > Nuclear (1.00)