高放废物地质处置预选地段调查与适宜性研究

doi:10.11720/wtyht.2023.0455

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Abstract

Based on the requirement of safe disposal of high-level radioactive waste, this study aims at the pre-selection area of the preferred pre-selection area of China's high-level radioactive waste disposal bank (Beishan pre-selection area). The data and materials of geology, hydrogeology, future natural change, geochemistry, construction and engineering, environmental protection and social economy were obtained by using the methods of geology, geophysics, hydrogeology and geochemistry. The constructability of preselected rock mass is demonstrated from the perspectives of engineering construction and engineering safety. The acceptability of the preselected rock mass in transport condition, land use, social economy and humanity was confirmed. On this basis, a relatively perfect site investigation and suitability comprehensive analysis method for the disposal warehouse is established, and a candidate site for the granite disposal warehouse is selected from the computational sub-section through the comprehensive analysis of site suitability and the comprehensive comparison of site identification and safety in the lot. The research results will directly serve the site screening and site characteristics evaluation of China's high-level radioactive waste geological disposal repository, and have important practical significance to ensure the safe management of nuclear waste and the sustainable development of nuclear energy in China.

Key words： geological disposal of high-level radioactive waste pre-selected lots candidate sites investigate evaluate

Received: 20 August 2023 Published: 23 January 2024

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	Articles by authors
	Hui LUO
	Wei-Ming CHENG
	Zhi-Chao ZHOU
	Jian LIU
	Ya-Wei LI
	Xiao TIAN
	Long YUN

Cite this article:

Hui LUO,Wei-Ming CHENG,Zhi-Chao ZHOU, et al. Investigation and suitability study of pre-selected sites for geological disposal of high level radioactive waste[J]. Geophysical and Geochemical Exploration, 2023, 47(6): 1479-1489.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.0455 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I6/1479

14])
1—Mesozoic granite; 2—late Paleozoic granite; 3—early Paleozoic granite; 4—Precambrian granite; 5—craton; 6—high pressure metamorphic zone; 7—suture tape; 8—ophiolite belt (① Hongshishan ophiolite belt; ② Shibanjing-Xiaohuangshan ophiolite belt; ③ Hongliuhe-Niuquanzi-Xichangjing ophiolite belt; ④ Huitongshan-Zhangfangshan ophiolite belt); 9—fault or inferred fault; 10—Quaternary and outcrop boundary; 11—location of the research area
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Regional tectonics (a) and intrusive rock distribution (b) in Beishan area (modified according to reference [14])
1—Mesozoic granite; 2—late Paleozoic granite; 3—early Paleozoic granite; 4—Precambrian granite; 5—craton; 6—high pressure metamorphic zone; 7—suture tape; 8—ophiolite belt (① Hongshishan ophiolite belt; ② Shibanjing-Xiaohuangshan ophiolite belt; ③ Hongliuhe-Niuquanzi-Xichangjing ophiolite belt; ④ Huitongshan-Zhangfangshan ophiolite belt); 9—fault or inferred fault; 10—Quaternary and outcrop boundary; 11—location of the research area

Geological schematic map of granite mass in Suanjingzi section
1—Holocene alluvial deposits; 2—lower Cretaceous Chijinbao formation; 3—Sandaomingshui east fine-grained granodiorite unit; 4—Sandaomingshui granodiorite unit; 5—Sandaomingshui north gneissic granodiorite unit; 6—lower Carboniferous Baishan formation; 7—middle Silurian Gongpoquan group; 8—Qingbaikou system Yuanzaoshan group Dahuoluoshan formation; 9—measured fault; 10—inferred fault; 11—integrate geological boundaries; 12—angle unconformity geological boundary; 13—boreholes and their numbering;14—geophysical survey line

Contour map of groundwater level of granite mass in Suanjingzi section

Distribution characteristics of main interstitial materials of granite mass in Suanjingzi section

Seismic structure map of the Suanjingzi nearby area

The variation pattern of in-situ stress of granite mass in Suanjingzi section with depth

属性	影响因素	指标	算井子地段
安全性	地质			岩体出露的面积	176 km²
				地球物理探测的岩体深度	2000 m
				钻孔验证的最深岩体深度(钻孔数量)	600 m(2口)
				岩体内出露最大的岩块面积	50 km²
				地球物理探测的岩体深部完整性	好
				钻孔验证的岩体深部完整性	好(2口深度大于500 m的钻孔)
				岩体内出露的岩性种类	1种(花岗闪长岩)
	水文地质			岩体内地下水位埋深	8.20~61.24 m
				岩体与最近排泄区的距离(名称,方位)	180 km(额济纳旗盆地,西)
				岩体内地下水水力梯度	10‰
				岩体内完整岩石渗透率	1×10^-11~1×10^-10m/s
				岩体内裂隙带渗透率	1×10^-8~1×10^-6m/s
	地球化学			岩体内地下水pH值	7.0~8.0
				岩体内地下水E_h值	-232~60 mV
				岩体内地下水温度	9~19 ℃
				岩体内地下水TDS	0.7~12.0 g/L
				岩体内地下水类型	Cl·SO₄-Na和SO₄·Cl-Na型
				岩体内岩石类型	花岗闪长岩
				岩体内裂隙充填物类型	方解石、黏土矿物、褐铁矿、绿帘石、石英等
	未来自然变化			岩体与最近活动断裂的距离(断裂名称)	155 km(三危山断裂)
	未来自然变化			岩体所在地震构造区中最大弥散地震震级(地震构造区名称)	5.5级(北山地震构造区)
	人类活动			岩体与最近地表水体的距离(名称)	140 km(疏勒河)
				岩体内矿(点)数量(矿种)	0个
				岩体外围5km内矿(点)数量	0个
可建造性	工程和建造	岩体地表地质灾害	无
可接受性	废物运输			岩体与最近铁路的距离(名称)	75 km(京新铁路)
				岩体与最近公路的距离(名称)	45 km(京新高速)
				岩体与大厂距离	145 km
				岩体与大厂、铁路和公路之间沿途人口	极其稀少
				岩体与大厂、铁路和公路之间沿途地势	平坦
	环境保护			岩体与最近地表水体的距离(名称)	120 km(干海子)
	环境保护			岩体对国家级保护区的影响	无
	土地利用			岩体土地类型	低产草地
				岩体土地用途	放牧
				岩体土地利用价值	极小
				岩体土地所在辖区	内蒙古额济纳旗
	社会经济和人文条件			岩体内常住人口数量	2人
	社会经济和人文条件			岩体与最近城市的距离	145 km(玉门)

Comprehensive analysis of the suitability in the Suanjingzi area

Three dimensional spatial distribution of granite mass in Suanjingzi section

Comprehensive comparison of site safety in the Suanjingzi area

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