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Shimada, Taro; Oshima, Soichiro; Ishigami, Tsutomu; Yanagihara, Satoshi
Proceedings of 10th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM '05) (CD-ROM), 8 Pages, 2005/09
In order to review an operator's "Decommissioning Plan" applied to the regulatory body for approval accurately and quickly, Public Dose Assessment Code for Decommissioning of Nuclear Reactors (DecDose) was developed. It evaluates public exposure doses for each year during dismantling activities in accordance with the "Decommissioning Plan". DecDose takes account of various exposure pathways such as cloudshine, surface ground deposition, ingestion of seafood, and direct and skyshine radiation based on the quantity of radionuclides discharged to the environment, and containers stored in the facility in consideration of cutting and storage of components and structures. Example evaluations with DecDose have shown that it is a useful tool for assessing public dose during decommissioning of nuclear reactors.
PA results against safety criteria with inherent 
Umeki, Hiroyuki; Naito, Morimasa; Kitayama, Kazumi*; Takase, Hiroyasu*
Proceedings of 10th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM '05) (CD-ROM), 6 Pages, 2005/09
In this paper, ambiguity of our knowledge required toundertake PA and vagueness associated with the judgment of compliance to safety criteria are characterised through a seriesof expert elicitations. Furthermore optimisation of the way ofpresenting PA results with uncertainties is discussed in the light of the generalised safety margin that is defined based onpossibility theory.
Kitayama, Kazumi*; Umeki, Hiroyuki; Ueda, Hiroyoshi*; Mckinley, I. G.*; Kaku, Kenichi*
Proceedings of 10th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM '05) (CD-ROM), 5 Pages, 2005/09
NUMO has been developing a structured approach to the entire stepwise repository development process. This includes both a bottom-up procedure for analysing the applicability of particular repository components (or sub-systems) within the range of expected site characteristics and a top-down multi-attribute analysis approach for comparing alternative disposal concepts or siting options.
Hooper, A.*; Mathieson, J.*; Alexander, W. R.*; Shiotsuki, Masao
Proceedings of 10th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM '05) (CD-ROM), 6 Pages, 2005/09
This paper reviews the topics discussed at the 3rd international TRU workshop, presents the conclusions of the workshop and provides an update of the current status and the future direction of work in relation to TRU/ILW wastes.
Ozawa, Masaki; Suzuki, Tatsuya*; Fujii, Yasuhiko*
Proceedings of 10th International Conference on Environmental Remediation and Radioactive Waste Management (ICEM '05) (CD-ROM), 6 Pages, 2005/09
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