干旱区生态环境知识资源中心(Arid): A modeling study of the effect of depth of burial of depleted uranium and thorium on radon gas flux at a dry desert alluvial soil radioactive waste management site (RWMS)

Arid

DOI	10.2172/10151448
报告编号	DOE/NV/10630--85
来源ID	OSTI_ID: 10151448
	A modeling study of the effect of depth of burial of depleted uranium and thorium on radon gas flux at a dry desert alluvial soil radioactive waste management site (RWMS)
	Lindstrom, F.T.; Cawlfield, D.E.; Emer, D.F.; Shott, G.J.
英文摘要	An integral part of designing low-level waste (LLW) disposal pits and their associated closure covers in very dry desert alluvium is the use of a radon gas transport and fate model. Radon-222 has the potential to be a real heath hazard. The production of radon-222 results from the radioactive decay (a particle emission) of radium-226 in the uranium-235 and 238 Bateman chains. It is also produced in the thorium-230 series. Both long lived radionuclides have been proposed for disposal in the shallow land burial pits in Area 5 RWMS compound of Nevada Test Site (NTS). The constructed physics based model includes diffusion and barometric pressure-induced advection of an M-chain of radionuclides. The usual Bateman decay mechanics are included for each radionuclide. Both linear reversible and linear irreversible first order sorption kinetics are assumed for each radionuclide. This report presents the details of using the noble gas transport model, CASCADR9, in an engineering design study mode. Given data on the low-level waste stream, which constitutes the ultimate source of radon-222 in the RWMS, CASCADR9 is used to generate the surface flux (pCi/cm{sup 2}-sec) of radon-222 under the realistic atmospheric and alluvial soil conditions found in the RWMS at Area 5, of the NTS. Specifically, this study examines the surface flux of radon-222 as a function of the depth of burial below the land surface.
出版年	1993
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	54 ENVIRONMENTAL SCIENCES ; 12 MANAGEMENT OF RADIOACTIVE AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES ; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS ; LOW-LEVEL RADIOACTIVE WASTES ; UNDERGROUND DISPOSAL ; RADON 222 ; NEVADA TEST SITE ; DEPTH ; DEPLETED URANIUM ; RADIUM 226 ; URANIUM 235 ; THORIUM 230 ; DECAY ; MATHEMATICAL MODELS ; DIFFUSION 540130 ; 052002 ; 053002 ; RADIOACTIVE MATERIALS MONITORING AND TRANSPORT ; WASTE DISPOSAL AND STORAGE ; RADIOACTIVE EFFLUENTS
URL	http://www.osti.gov/scitech/servlets/purl/10151448
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/265215
推荐引用方式 GB/T 7714	Lindstrom, F.T.,Cawlfield, D.E.,Emer, D.F.,et al. A modeling study of the effect of depth of burial of depleted uranium and thorium on radon gas flux at a dry desert alluvial soil radioactive waste management site (RWMS),1993.