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Home > Archives > Volume 20, No 5 (2022) > Article

DOI: 10.14704/nq.2022.20.5.NQ22143

Measurement of Radon Gas Concentrations for different Types of Water in AL-Najaf Refinery by Using RAD7 Monitor

Mokhalad A. Mohammed and Rawaa M. Obaid


In this study, the average radon gas concentration for different types of water was measured in AL-Najaf refinery by using RAD7 monitor manufactured by DURRIDGE company, USA, there are two sources of water inside the refinery, river water, and well water, at RO unit inside the refinary, they use 50% of well water (W1) and 50% of river water (W7), as drinking water after mixing and processing them, the mixed water also used as tap water (W5), or as water for oil refining process, in the refining units, the water boils before it is used in the refining process and it does not contain any concentration of radon gas as in sample (W8), and after refining process, the water becomes wastewater (W4), the other wells inside the refinery, (W3), (W9), (W4) and (W2) are used to irrigate the plants located at the borders of the refinery, the results showed that the maximum value was 471 Bq/m3 in the well water (W1), and the minimum value was 0 Bq/m3 in the water of the boiler at the refining units (W8), and the average of readings obtained from all water samples was of 108.6888889 Bq/m3, also the estimation for the average of radon gas concentration in the refinery air was made with the help of EPA estimations and the annual effective dose for inhalation (Einhalation), Lung Cancer Risk (LCR), exposure to radon and it’s progenies (Ep) and Potential Alpha Energy Concentration (PAEC) were determined for the workers inside the refinary. All the results were within the accepted limits recommended by EPA and WHO.


Radon Gas, Al-Najaf Refinery, RAD7 Monitor, Well Water, Drinking Water.

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