Determination of radon concentration and emanation rate in soil using cr-39 and crm surround UiTM Jengka / Nurina Amani Yazid

The determination of radon gas in the soil was performed using CR-39 and CRM
to assess the radon concentration and emanation rate for the selected point in UiTM
Jengka via the sealed container method and evaluating the radiological risk. The
soil samples were collected from 10 coordinates inside the parameter of UiTM
Jengka using GPS and transformed into loose powder samples. CR-39 and CRM
were used to analyse the radon gas production in the samples while the primordial
radionuclides were analysed using EDXRF. The radon concentration and
emanation rate analysed using CR-39 varies between 45.5-156 Bqm-3 and 0.040-15
Bqm-2day-l respectively. Meanwhile, the radon concentration and emanation
rate analysed using CRM varies between -14.60 - 89.10 Bqm-3 and -1.05 x 10-6 -
6.39 X 10-6 mBq/kg-1hr-1 respectively. UJ1 was found to be in a high radon content
while UJ8 has the lowest radon content. From the EDXRF analysis, the source of
radon concentration in the soil samples were studied and the radiological risk has
been assessed. Potassium-40 element did present in all samples while Thorium-232
partially present in some of the samples. However, Uranium-238 was not found in
any of the samples. The soil samples from the selected points in UiTM Jengka does
not exceed maximum world limit of dose rate. However, UJ1, UJ2, UJ4, UJ5 and
UJ6 possessed a radiological risk as the external hazard index exceeds value of 1