Ionizing radiation safety in the medical field, referred to as radiation safety, is an action taken to protect patients, workers, community members, and the environment from the dangers of radiation. One of the efforts to achieve this is by increasing the qualifications of radiation workers in understanding and implementing radiation protection and safety through ionizing radiation safety and security training initiated by the Radiation Protection Officer (PPR) team at Dr. RSUP. Kariadi Semarang. During the current pandemic, implemented the training by modifying what was previously done using face-to-face and field practice into online delivery of material and making videos as a substitute for field practice. As a result, these activities can run well and smoothly. The impression from the training participants stated that this training was beneficial and should be done regularly. Keywords: training, ionizing radiation, radiation protection officer