Radon survey in eleven newly developed estates in Hong Kong
Authors
Citation
Hong Kong Papers in Design and Development, v.1, 1998, pp. 56-58
Abstract
The indoor radon level in Hong Kong can be attributed emanations from concrete material widely used in the building industry. New buildings are expected to be subject to even higher levels. From July 1994 to June 1995 a radon survey was carried out in eleven newly developed estates in Hong Kong, both private and public. About 700 cases were surveyed using alpha track detectors on a half yearly basis. The results showed that the geometric mean radon concentration in these newly built premises (80 Bq/m3) was generally higher than other residential premises (69 Bq/m3) studied in 1992/93. Concentration levels were subject to seasonal variations, winter and spring seasons being higher (80 Bq/m3) than summer and autumn (72 Bq/m3). Results showed that the ventilation provided by a half-open window reduced radon levels by 19% to 23% of levels recorded with windows closed. Wall paper, which is a less permeable covering material than emulsion paint was more effective at reducing radon levels.
(1) Introduction
(2) Methodology
(3) Quality Assurance
(4) Result and discussion
(5) Conclusion
Description
Subject
Type
Article
Format
Date
1998
Language
en