1. Universitas Gadjah Mada Department of Engineering Physics, Nuclear Engineering Program Jalan Grafika 2, Yogyakarta 55281, Indonesia
2. Delft University of Technology Department of Radiation, Radionuclides and Reactors, Mekelweg 15, 2629 JB Delft, The Netherlands
3. Imperial College of Science Technology and Medicine, Department of Earth Science and Engineering Prince Consort Road, London SW7 2AZ, United Kingdom