Internal dosimetry code according to the ICRP 2007 recommendations; Internal exposure dose estimation based on the latest international standard models and data

Takahashi, Fumiaki  

The current regulations for radioisotopes have been enacted based on the 1990 Recommendations of the International Commission on Radiological Protection (ICRP) in Japan. On the other hand, ICRP has published the 2007 Recommendations and then discussions are underway to incorporate the new Recommendations into Japanese radiation regulations. In addition, the international standard model and data used have been updated for internal dosimetery by ICRP. Thus, if the 2007 Recommendations of ICRP are incorporated into domestic radiation regulations, the regulatory standard values may be updated for internal exposure. In this presentation, reviews will be made on the latest dose assessment model and data based on the 2007 Recommendations of ICRP, focusing on changes from the past ones. Next, we will report on the internal exposure dose evaluation code that is being developed as a commissioned project from the Nuclear Regulation Authority.