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Short-Term Radon Measurements in the Workplace

Radiation Hygiene Division, Paul Scherrer Institute, Villigen, Switzerland

A novel envelope-type radon monitor has been used for short-term (as little as 1 week) radon concentration measurements in a workplace environment. The commercially available LR-115 type II damage track detector was used in this study and the chemically etched sheets were spark counted. The measure ments were made over a period of 1 year in a workplace consisting of three adjacent rooms situated in the lower ground level of a multistorey office build ing in Rome, Italy. The variations of the radon concentration are from 20 to 300 Bq m^-3 with averages of 130, 81 and 73 Bq m^-3 for the three different rooms resulting in annual doses of 3.8, 2.4 and 2.2 mSv, respectively.

Key Words: Indoor radon • Envelope-type radon monitor • Short-term radon measurements • Spark counter • Annual dose

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