Abstract
The term “clearance” refers to the idea that if an exposure dose due to a very low-level artificial radioactive material is sufficiently smaller than natural background radiation and human health risk is negligibly small, that artificial radioactive material does not need to be treated as a radioactive material, and therefore the material may be released from regulatory control even if the category to which the material belongs is under regulatory control for radiation protection.
The nuclear regulatory system in Japan has been changed significantly after the Fukushima Daiichi Nuclear Power Station accident in March 2011. Descriptions in this chapter have been translated from the book originally published in Japanese before the accident, with minimal update where appropriate. The Nuclear Regulation Authority newly established after the accident has not completed its review for the guidelines and regulations established by the former Nuclear Safety Commission. In this chapter, guidelines set by the NSC have been adopted.
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Tachibana, M. (2015). Clearance. In: Nagasaki, S., Nakayama, S. (eds) Radioactive Waste Engineering and Management. An Advanced Course in Nuclear Engineering. Springer, Tokyo. https://doi.org/10.1007/978-4-431-55417-2_4
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DOI: https://doi.org/10.1007/978-4-431-55417-2_4
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