Indoor Radon Mapping and Assessment of Excess Lifetime Cancer Risk in the Kolmani Oil Field of Alkaleri, Bauchi State, Nigeria

Authors

Keywords:

Indoor, Radon, Mapping, Lifetime Cancer Risk, Kolmani Oil Field

Abstract

Oil and gas exploration is one of the major sources of naturally occurring radioactive materials (NORMs). The work assessed the radiological hazard associated with the radon in soils of the oil and gas exploration site, Bauchi state, Nigeria. The study aims to measure indoor radon concentration and evaluate the excess lifetime cancer risk from its exposure. The indoor radon concentrations were measured at Kolmani oil field using electronic semiconductor detector (RAD7). The indoor radon activity concentration varies from 52.1 ± 1.92 Bq/m3 to 196.5 ± 4.41 Bq/m3 with a mean value of 126.5 ± 3.36 Bq/m3. The result for Annual effective dose (Eaed) calculated from the measured indoor radon was 2.29 mSv/y, which are clearly above the permissible limit of 100 Bqm-3 and 1.15 mSv/y set by (WHO) and (UNSCEAR, 2000). The potential health risk was determined by computing Excess Lifetime Cancer Risk (ELCR) and lung cancer cases per year per million persons (LCC). The map for the distribution and exposure rate due to indoor Radon for the Kolmani oil field was also plotted using Golden surfer 12 software. The average values for (ELCR) and (LCC) are respectively1.2 x 10-2 and 56.28 per millions, which is lower than the limit range of 170–230 per million persons recommended by ICRP. These measurements provide valuable insights for evaluating public radiation exposure and establishing robust radiological safety protocols.

Dimensions

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Published

2026-04-15

How to Cite

Muhammed, A. M., Adamu, A., Aliyu, A. M., Abubakar, D., Baballe, A., & Aji, A. A. (2026). Indoor Radon Mapping and Assessment of Excess Lifetime Cancer Risk in the Kolmani Oil Field of Alkaleri, Bauchi State, Nigeria. Nigerian Journal of Physics, 35(2), 58-68. https://doi.org/10.62292/njp.v35i2.2026.471

Issue

Vol. 35 No. 2 (2026): Nigerian Journal of Physics - Vol. 35 No. 2

Section

Articles
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How to Cite

Muhammed, A. M., Adamu, A., Aliyu, A. M., Abubakar, D., Baballe, A., & Aji, A. A. (2026). Indoor Radon Mapping and Assessment of Excess Lifetime Cancer Risk in the Kolmani Oil Field of Alkaleri, Bauchi State, Nigeria. Nigerian Journal of Physics, 35(2), 58-68. https://doi.org/10.62292/njp.v35i2.2026.471

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