MEASUREMENT AND ANALYSIS OF EXCESS LIFE CANCER RISK DUE TO TERRESTRIAL GAMMA RADIATION DOSES IN FEDERAL UNIVERSITY, DUTSI-MA CAMPUSES, KATSINA STATE, NIGERIA
DOI: https://doi.org/10.33003/jobasr
Abstract
Natural radionuclides are constant in the environment, making human exposure to terrestrial gamma radiation dose inevitable. This study investigates the radiological nature of Federal University Dutsin-Ma's Take-off and Main Campuses to evaluate potential health risks (if any) of workers and students. A digital radiation meter was used to measure terrestrial gamma radiation, and from the values measured annual effective dose (AED) and excess life cancer risk were computed. In the take-off campus, the highest AED was at the school clinic (TOC-A5) with 2.76 mSv/y, while the lowest value was at the school gate (TOC-A1) with value 1.02 mSv/y. The campus-wide average AED was 1.75 mSv/y. In the main campus, the highest AED was 2.64 mSv/y at the School Clinic (MC-A4), while the least was at the Senate Building (MC-A2) with 1.14 mSv/y. The average AED was 1.64 mSv/y which is higher than (ICRP) recommended dose limit of 1 mSv/y for the general public implying potential health risk. The excess lifetime cancer risk (ELCR) values in take-off campus, highest ELCR observed at the school clinic (TOC-A5) at 8.68 and the lowest at the school gate (TOC-A1) at 3.21. The average ELCR across all areas is 5.49. In main campus, the values for ELCR, the highest ELCR is observed at the school clinic (MC-A4) with a value of 8.30, and the lowest ELCR is at the senate building (MC-A2) with a value of 3.59. The average ELCR across all areas is 4.99.
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