The next School on Radiation Technologies will be during 14-25 October 2019 in collaboration with the Rosatom Technical Academy in Obninsk, Russia 
Have a look at the RT School 2019 announcement here

Previous Radiation Technologies Schools 

2017 - Nuclear and Energy Research Institute , São Paulo, Brazil

2014 - Hamad Medical Corporation, Doha, Qatar

2012 - Kyeryong Spatel, Daejeon, Republic of Korea  

2010 - Swiss Grand Hilton, Seoul, Republic of Korea

The founding supporters: