A number of radon-related properties have been surveyed in underground
shopping centers in Hong Kong. These parameters include the radon con
centration, the total potential alpha energy concentration of radon pr
ogeny, the equilibrium factor and the unattached fraction of radon pro
geny. The mean values recorded for these were 29.2 +/- 7.8 Bq/m(3), 3.
60 +/- 1.53 mWL, 0.46 +/- 0.16 and 0.05 +/- 0.03, respectively. Based
on these figures, we have calculated the average radon dose received b
y employees in an underground shopping center in Hong Kong to be 0.22
mSv/yr, which represents an approximate increase of 8% over the total
dose of about 2.7 mSv/yr received by the average person in Hong Kong.
(C) 1997 Elsevier Science Ltd.