UTeM Conference Systems, Malaysia University Conference Engineering Technology

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A Study of Kuantan, Pahang Malaysia Terrestrial Background Radiation in Determination of Uranium & Potassium-40
Nurlin Abu Samah

Last modified: 2014-10-17

Abstract


Human is always exposed to radiation externally and internally from the early civilization due to various activities. Since Lynas Corporation which is the rare earth processing company is developed in the industrial area of Gebeng in Kuantan, and was said will lead to the production of higher amount of radiation, there is a need to do this study in order to measure the level of radiation exposure of the terrestrial area around Kuantan. This study will develop Kuantan district terrestrial background radiation baseline data and establish the preliminary data on Kuantan terrestrial based on the readings observed via gamma ray detector, analysis via Induced Couple Plasma-Mass Spectrophotometer for determination of uranium content and Atomic Absorption Spectrophotometer for determination of potassium-40. This study is carried out at ten different sampling locations around Kuantan at certain longitudes and latitudes taking the location of Lynas Corporation as the reference point by using Global Positioning System (GPS) navigation device. The dose rate measurements were done by in- situ method using a portable gamma ray detector at 1 m above the ground. The analysis result of soils by using ICP-MS shows that the highest uranium-238 concentration in soil sample is 345.51μg/g which is at the sampling point 3 in Bukit Tanah Merah. On the other hand, the lowest concentration of uranium-238 is 65.24μg/g at the first sampling point which is located at Lynas. The concentrations of potassium-40 are in the range 0.005 ppm to 0.014 ppm. The concentration of the potassium-40 in the samples is in the range of standard concentration of soil in Kuantan terrestrial. The isotopic ratio of potassium-40 is 0.0117% with limit of detection  value is 0.4 ppm. The amount of radiation exposure is still in safe level for human and other living organisms in Kuantan.


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