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Abstract: Uranium (238U) and thorium (232Th) contents were measured in different foods widely consumed by the rural Moroccan population by using two different types of solid state nuclear track detectors (SSNTDs). The method utilized is based on determining the probabilities for α-particles emitted by the uranium and thorium series inside the studied materials to reach and be registered on the CR-39 and LR-115 type II SSNTDs and counting the resulting track densities. Total daily intakes of 238U and 232Th for a typical food basket were estimated to be 1.27Bqd−1 and 0.95Bqd−1, 1.55Bqd−1 and 1.18Bqd−1 and 2.01Bqd−1 and 1.52Bqd−1 for the 7–12y, 12–17y and adults age groups, respectively. Annual committed equivalent doses were evaluated in the human body compartments of members of the Moroccan rural population due to 238U and 232Th from the ingestion of the studied food materials by using the ICRP ingestion dose coefficients. Annual committed effective dose due to 238U and 232Th intakes were found to be 3.16×10−5 Sv and 10.10×10−5 Sv, 3.81×10−5 Sv and 10.80× 10−5 Sv and 3.32×10−5 Sv and 12.80×10−5 Sv for the 7–12y, 12–17y and adults age groups, respectively. [Copyright &y& Elsevier]

Abstract: Uranium (238U) and thorium (232Th) concentrations as well as radon (222Rn) and thoron (220Rn) alpha-activities per unit volume have been measured inside various potable water samples collected from nineteen cities in Morocco by using CR-39 and LR-115 type II solid state nuclear track detectors (SSNTDs). Measured radon alpha-activities ranged from (0.37±0.02)Bql−1 to (13.6±1.10)Bql−1 for the potable water samples studied. Alpha-activities due to radon from the ingestion of the studied potable water samples were determined in different compartments of the gastrointestinal system by using the ICRP compartmental model for radon. Annual committed equivalent doses due to radon were evaluated in the gastrointestinal compartments from the ingestion of the potable water samples studied. The influence of the target tissue mass, radon intake and alpha-activity integral due to radon on the annual committed equivalent doses in the gastrointestinal compartments was investigated. [Copyright &y& Elsevier]