Radiation protection is a subject of preventing and evaluating harmful effects of ionizing radiation on humans and the environment. The team is committed to promoting the research and application novel measurement technology in the field of ionizing raditation. The research content of the team mainly focuses on four aspects: new technology of radioactivity measurement and internal radiation dose evaluation; new technology of X / gamma external radiation dose measurement of environment and protection level; new technology of neutron protection measurement; new technology of radiation protection measurement of medical treatment and security equipment. The team's new research results, such as standard devices and reference materials, will continue to contribute to the accurate and reliable measurements.