干旱区生态环境知识资源中心(Arid): Soil-to-Plant Concentration Ratios for Assessing Food Chain Pathways in Biosphere Models

Arid

DOI	10.2172/926965
报告编号	PNNL-16741; NUREG/CR-6941
来源ID	OSTI_ID: 926965
	Soil-to-Plant Concentration Ratios for Assessing Food Chain Pathways in Biosphere Models
	Napier, Bruce A.; Fellows, Robert J.; Krupka, Kenneth M.
英文摘要	This report describes work performed for the U.S. Nuclear Regulatory Commission鈥檚 project Assessment of Food Chain Pathway Parameters in Biosphere Models, which was established to assess and evaluate a number of key parameters used in the food-chain models used in performance assessments of radioactive waste disposal facilities. Section 2 of this report summarizes characteristics of samples of soils and groundwater from three geographical regions of the United States, the Southeast, Northwest, and Southwest, and analyses performed to characterize their physical and chemical properties. Because the uptake and behavior of radionuclides in plant roots, plant leaves, and animal products depends on the chemistry of the water and soil coming in contact with plants and animals, water and soil samples collected from these regions of the United States were used in experiments at Pacific Northwest National Laboratory to determine radionuclide soil-to-plant concentration ratios. Crops and forage used in the experiments were grown in the soils, and long-lived radionuclides introduced into the groundwater provide the contaminated water used to water the grown plants. The radionuclides evaluated include 99Tc, 238Pu, and 241Am. Plant varieties include alfalfa, corn, onion, and potato. The radionuclide uptake results from this research study show how regional variations in water quality and soil chemistry affect radionuclide uptake. Section 3 summarizes the procedures and results of the uptake experiments, and relates the soil-to-plant uptake factors derived. In Section 4, the results found in this study are compared with similar values found in the biosphere modeling literature; the study鈥檚 results are generally in line with current literature, but soil- and plant-specific differences are noticeable. This food-chain pathway data may be used by the NRC staff to assess dose to persons in the reference biosphere (e.g., persons who live and work in an area potentially affected by radionuclide releases) of waste disposal facilities and decommissioning sites.
出版年	2007
报告类型	Technical Report
语种	英语
国家	美国
来源学科分类	12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES ; ALFALFA ; ANIMALS ; BIOSPHERE ; CHEMICAL PROPERTIES ; CHEMISTRY ; CONCENTRATION RATIO ; CROPS ; DECOMMISSIONING ; FOOD CHAINS ; FORAGE ; RADIOACTIVE WASTE DISPOSAL ; RADIOISOTOPES ; SOIL CHEMISTRY ; SOILS ; WASTE DISPOSAL ; WATER ; WATER QUALITY soil geochemistry ; bioavailability ; radionuclide uptake ; concentration ratio ; performance assessment modeling
URL	http://www.osti.gov/scitech/servlets/purl/926965
资源类型	科技报告
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/269471
推荐引用方式 GB/T 7714	Napier, Bruce A.,Fellows, Robert J.,Krupka, Kenneth M.. Soil-to-Plant Concentration Ratios for Assessing Food Chain Pathways in Biosphere Models,2007.