Proceedings of the Fourth Symposium of the Croatian Radiation Protection Association

New Croatian Act on ionizing radiation protection is in a final stage of genesis. Ministry of Health is responsible to the Government of the Republic of Croatia, closely collaborating with the Croatian Radiation Protection Institute and the Croatian Institute for the Occupational Health. Responsibilities include all aspects relating sources of ionizing radiation in Croatia: practices, licenses, users, transport, in medicine and industry as well, workers with sources of ionizing radiation, emergency preparedness in radiological accidents, storage of radioactive wastes, x-ray machines and other machines producing ionizing radiation and radioactive materials in the environment. Papers from the Fourth Symposium of the Croatian Radiation Protection Association are presented in seven sessions: 1. General Topics of Interest for Radiation Protection 2. Biological Effects of Radiation 3. Radioactive Waste Management 4. Radioecology 5. Dosimetry and Instrumentation 6. Radiation Protection in Medicine 7. Radon