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Some Remarks On Radon Concentration At Various Locations In Peninsular Malaysia

Ahmad Saat, and Zaini Hamzah, and Wan Muhamad W A Kadir, and Zaharidah Abu Bakar, and Zuraidah A Munir, and Siti Mariam Sumari, and Misbah Hassan, (2007) Some Remarks On Radon Concentration At Various Locations In Peninsular Malaysia. In: Persidangan Fizik Kebangsaan, PERFIK 2007, 26 - 28 Dec 2007, Kuala Terengganu, Malaysia. (Submitted)

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Affiliations

International Education Centre, Universiti Teknologi MARA, S Alam
Universiti Teknologi MARA, Fakulti Sains Gunaan
Universiti Teknologi MARA, Fakulti Sains Gunaan
Universiti Teknologi MARA, Fakulti Sains Gunaan
Universiti Teknologi MARA, Fakulti Sains Gunaan
Universiti Teknologi MARA, Fakulti Sains Gunaan
Universiti Teknologi MARA, Fakulti Sains Gunaan

Abstract

A study was carried out to determine radon concentration at five locations in Malaysia. Two locations (KG & AP) are former tin mining areas that has been converted to housing area and training centre respectively, one a relatively new city (SA), that was formerly a rubber and oil palm plantation area, one older cities (KB) and one housing complex by the sea (LP). The study was carried out in 2005, 2006 and 2007 using a diffused-junction photodiode sensor continuous radon monitor. The monitor is recognized by the USEPA. In each location, measurements were carried out on at least ten sites. Former tin mining areas of KG and AP shows up to seven times higher indoor average than the average in the other three locations. However the indoor average in all locations is still below the action level of 4 pCi/l. For outdoor, the former tin mining areas average concentration was higher than the global average of 0.4 pCi/l. For the twenty four hours temporal variation the trend indicated that former tin mining areas concentration are always higher, and at time up to six fold higher. The hourly variation of all locations follows an identical trend of high concentration during early to late morning and drop in the afternoon till evening. The outdoor twenty four hour temporal average of former tin mining areas is consistently higher than the outdoor global average of 0.4 pCi/l. The strong correlation between indoor and outdoor concentration at AP, indicates that indoor radon might originates from outdoor environment. The study was also extended to estimate the annual effective dose (mSv/y) of Rn-222 to the public.

Item Type:Conference or Workshop Item (Paper)
Keywords:Radon, effective dose, tin soils
Subjects:Q Science, Computer Science
ID Code:3063

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