Natural Radioactivity and radiological Hazard analysis of Construction stones from various queries in Machakos County Kenya. Radiation Protection Dosimetry.

dc.contributor.authorMuthama, Matsitsi
dc.date.accessioned2023-11-20T10:31:47Z
dc.date.available2023-11-20T10:31:47Z
dc.date.issued2023-07
dc.descriptionHazard analysis of construction stonesen_US
dc.description.abstractThe radioactivity levels of rocks sampled from the quarries of Kyasioni, Mavoloni and Kathaana located in the lower Eastern County of Machakos in Kenya were determined. Forty-two samples were collected using stratified random sampling and analysed using NaI(TI) detector with a specially designed lead shield. The parametric values of activity concentration, absorbed dose, annual dose rate and hazard indices were estimated using activity-dose relations suggested in UNSCEAR and ICRP reports. The mean activity concentration for the entire work for 238U (226Ra), 232Th and 40K were 68.33 ± 3.11, 101.10 ± 1.83 and 1084.02 ± 30.28 Bq/kg, respectively. Kyasioni quarry presented the highest activity concentration of 74.75 ± 3.15, 118.48 ± 1.91 and 1120.35 ± 30.07 Bq/kg for 226Ra, 232Th and 40K, respectively. The average annual effective dose was estimated as 0.58 ± 0.01, 0.47 ± 0.01 and 0.52 ± 0.01 mSv/y for Kyasioni, Kathaana and Mavoloni quarries, respectively. Other radiological parameters estimated from the corresponding activities were within the recommended limits hence guaranteeing safety to the users.en_US
dc.identifier.citationRadiation Protection Dosimetry 199(3)en_US
dc.identifier.uriDOI:10.1093/rpd/ncad211
dc.identifier.urihttps://karuspace.karu.ac.ke/handle/20.500.12092/2975
dc.language.isoenen_US
dc.titleNatural Radioactivity and radiological Hazard analysis of Construction stones from various queries in Machakos County Kenya. Radiation Protection Dosimetry.en_US
dc.typeArticleen_US

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