9:15 AM - 9:30 AM
[HCG22-02] ISCN's Contribution to International Verification Regime for CTBT
Keywords:a world without nuclear weapon, International Verification Regime for CTBT, radionuclide monitoring, nuclear test
In support of the CTBT international verification regime, ISCN operates the radionuclide monitoring stations in Okinawa and Takasaki, as well as the certified radionuclide laboratory in Tokai and the national data center for nuclear test monitoring, as stipulated by the treaty. In order to enhance nuclear test detection capabilities, transportable noble gas monitoring systems have been installed in Mutsu City, Aomori Prefecture and Horonobe Town, Hokkaido for measurement as a joint observation project to investigate the background behavior of radioactive noble gases together with the CTBT Organization.
So far, Xe emissions from North Korea's third nuclear test in 2013 have been detected, and back-tracking has been conducted to identify the source of the emissions.
In addition, during the accident at the Fukushima Daiichi Nuclear Power Plant in 2011, Xe emissions were monitored and analyzed for three months to return to pre-accident levels, showing that the CTBT's noble gas monitoring system has the potential to be applied not only to verify nuclear tests but also to monitor nuclear power plants operation.