@article{oai:repo.qst.go.jp:00045519, author = {Yamada, Yuji and Fukutsu, Kumiko and Yuuki, Masanori and Akashi, Makoto and 山田 裕司 and 福津 久美子 and 結城 政則 and 明石 真言}, issue = {2}, journal = {Radiation Protection Dosimetry}, month = {Jun}, note = {After radiological emergencies, patients contaminated with radioactivity are taken to radiation emergency hospitals for treatment. Numerical simulations using the computer software 'Flow Designer' were made in order to evaluated indoor air contamination caused by the breathing out of contaminated air. The National Institute of Radiological Sciences facility was used for the numerical evaluation. Results indicate that the dispersion of contaminated air depends on the characteristics of the contaminants, and the dispersion range was limited and localised. Only medical staff standing in a special position near the patient was exposed to almost undiluted contaminated air. Highly contaminated air was evacuated with a local exhaust pump system. Room air quality was monitored using a continuous air sampling system, but it was found that the sampling point was not representative for the purpose of radiation protection. From the air-flow analysis, some problems that affect radiological safety were revealed and valuable information and measures for preventing secondary contamination were determined.}, pages = {113--121}, title = {Air Contamination Analysis during Emergency Medical Treatment}, volume = {134}, year = {2009} }