Nuclear test analysis in Japanese NDC-2; Analytical procedure and release condition for ATM

Kijima, Yuichi ; Yamamoto, Yoichi 

The flow of analysis for nuclear test event in the Japanese NDC-2 will be presented. When the information on a nuclear test event is obtained from the Secretariat of the CTBT National operation system of Japan (NOSJ), the first thing to be done in the NDC-2 is to forecast a possible movement of a virtual radioactive plume emitted from the nuclear test site by the ATM analysis. Based on the analysis results, radionuclide stations to be monitored are selected and the radionuclide data from the stations are analysed in detail. The results of both the ATM analysis and the radionuclide analysis are reported to the Secretariat of NOSJ. A part of studies on the released condition of the ATM analysis will also be presented.