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Identification of Contaminants of Concern for the Postclosure Assessment of the Concept for the Disposal of Canada's Nuclear Fuel Waste

B. W. GoodwinKishor K. MehtaWhiteshell Laboratories

出版	Whiteshell Laboratories, 1994
ISBN	06601551339780660155135
URL	http://books.google.com.hk/books?id=1WTbAAAAMAAJ&hl=&source=gbs_api

註釋The concept for the disposal of Canada's nuclear fuel waste involves the isolation of irradiated fuel in corrosion-resistant containers emplaced in a vault located deep in crystalline rock of the Canadian Shield. To estimate potential impacts on members of a critical group far into the future, a postclosure assessment evaluates the long-term safety of the concept. This report provides an upper bound on estimated radiation dose and chemical toxicity effects on humans from all potentially toxic contaminants, and identifies those that require detailed consideration in the postclosure assessment. It also examines the origins and properties of the contaminants, including radioactive half-life, inventory, mobility in groundwaters and sorption on rock, degree of toxicity, and precursors and progeny for members of a decay chain. The report considers how these properties affect the behaviour of different contaminants in different parts of the disposal system, leading to suggested methods of treatment of different contaminants when simulating their fate within the disposal system. In particular, recommendations are made on how the actinide decay chains can be simplified for study in the postclosure assessment.