Outline of NORM Guidelines in Japan

Saito, Tatsuo  

This lecture is the Introduction of outline of NORM Guidelines in Japan. It is necessary to consider whether raw materials and general consumer goods whose radioactivity concentration or activity exceeds the exemption level need to be regulated in the same way as artificial radiation sources. "Exemption from regulation of natural radioactive substances", published in 2003 by Radiation Council of MEXT Japan, is the first guideline for the Basic Concept for NORM, defined and categorized NORM with its containing minerals or generic streams, into 8 groups to lead to each guideline dose (1 mSv/y or 10 uSv/y) for action/exemption. "Guideline for Ensuring Safety of Raw Materials and Products Containing U or Th", published in 2009 by MEXT Japan is the second guideline for Identification of targeted manufactures for NORM safety, and implementation for ensuring safety by manufactures and importers. 1 to 10 Bq/g, and 8,000 Bq are used as the standard of this guideline to identify targeted manufactures and importers of consumer goods subject to the guideline.