| Considering the risk of exposure of workers who handle NORMs,
these materials should be governed by appropriate standards. Hence, the
"Guidelines on the Security for Materials and Products Including Uranium
or Thorium" publication was officially announced by MEXT on June 26,
2009. These guidelines provide basic advice for manufacturers and workers
and is not a collection of laws or ordinances.
In these guidelines, monazite, bastnaesite, zircon, tantalite,
phosphorus ore, titanium ore, coal, purified uranium, and purified thorium
are designated as materials to requiring regulation. Concentration of uranium
or thorium exceeding 1 Bq/g is covered in these guidelines, which are to
be revised on an ongoing basis according to the actual execution of security
measures implemented at each factory.
- Guideline for Ensuring Safety of Raw Materials and Products Containing Uranium or Thorium