Abstract: The activity concentrations of twenty soil samples collected from contaminated locations of Fuel Fabrication Facility (FFF) at Al- Tuwaitha nuclear site, Iraq, were determined by using spectroscopy with a high purity germanium detector. The range of activity concentrations of 238U (234mPa), 235U, 232Th (228Ac), and 40K in the soil from the studied areas varies from (177.74±60) to (375777.5±6895) Bqkg-1, (7.4±0.5) to (20954±407.5) Bqkg-1, (7.06±0.22) to (20.45±0.33) Bqkg1 and from (47.5±5.3) to (402.2±15.5) Bq kg-1 respectively. The isotopic mass and activity ratio of 235U/238U were calculated to identify kind of uranium, depleted or natural. To assess the radio logical risk for this site, RESRAD program was used to calculate total dose from all pathways (external, inhalation and soil ingestion) of exposure, the value of total dose was 2mSv/yr. Laboratory results indicated that the FFF was contaminated with 234mPa and 235U nuclides in excess of the IAEA limits for exemption from regulatory control, and indicating that the decommissioning operations for the FFF must be subjected to regulatory control and safety surveillance to ensure adequate protection of the operators, public and the environment.Abstract: The activity concentrations of twenty soil samples collected from contaminated locations of Fuel Fabrication Facility (FFF) at Al- Tuwaitha nuclear site, Iraq, were determined by using spectroscopy with a high purity germanium detector. The range of activity concentrations of 238U (234mPa), 235U, 232Th (228Ac), and 40K in the soil from the studied ...Show More
Abstract: Pediatric patients are among the most sensitive on ionizing radiation when they should be undergoing an X-Ray screening. The delivered dose to the pediatric patients should be well optimized to minimize the harmful effect of the X-Ray examinations. The objectives of this work are to measure at chest level and corresponding organ doses for each pediatric patient undergoing X-Ray radiation examination. The study was carried out in three hospitals in Madagascar. During these measurements, the patient doses were determined using thermo luminescent dosimeters (TLDs) placed upon to the patient’s body. The examination parameters (high voltage, filtration, field size and focus to skin distance examinations) for 114 patients undergoing chest examination with an Antero- Posterior (AP) projection have been collected. Entrance Surface Air Kerma (ESAK) was determined by using calibrated thermoluminescent dosimeters (TLD- 100) through the Secondary Standard Dosimetry Laboratory of Institut National des Sciences et Technique nucleaire- Madagascar. Patients population were categorized into four groups in accordance with their ages ([<1) year] (group 1), for group 2([1-5] years), for group 3([5-10] years) and for group 4([10-15] years).Values of organs doses vary following the age: the received dose increase inversely with the age of the patient. The breast received doses represents the maximum values compared with the other organs. Results of the ESAK have been used to evaluate the radiation dose levels for pediatric patients in Madagascar, to establish local diagnostic reference level and to optimize pediatric patient delivered doses. The patient organ received doses versus the dose at chest level have been determined by using National Radiological Protection Board (NRPB) coefficients through Visual Basic Application (VBA) tool.Abstract: Pediatric patients are among the most sensitive on ionizing radiation when they should be undergoing an X-Ray screening. The delivered dose to the pediatric patients should be well optimized to minimize the harmful effect of the X-Ray examinations. The objectives of this work are to measure at chest level and corresponding organ doses for each pedi...Show More
Abstract: In this study Soil gas radon 222Rn activity was measured in different locations at Al-Tuwaitha Nuclear Site and the surrounding areas using RAD7 (radon detector). Radon activity in the soil gas varied from (866±150 to 16004±521) Bq/m3 near Alaibtihal School and Ishtar \ Al-Ttakhi School respectively. These concentrations values are well below the allowed levels that range from (0.4 to 40) KBq/m3. The annual effective doses related to the inhalation of radon gas and its progeny which were calculated from the Concentration of emanation in air near ground ranged from (0.0082305 to 0.152102) mSv/y. these results are less than the recommended global average dose from the inhalation of radon from all sources, which is 1 mSv/y. The Health risks originating from indoor radon concentration can be attributed to natural factors and is characterized by geogenic radon potential (GRP), The highest values were found in Ishtar \ Al-Ttakhi school which is (16.004) and The lowest values were found Near Alaibtihal school which is (0.288666667), the lowest value according to Neznal was classified as low (GRP < 10) and the highest value was classified as medium (10 < GRP < 35), according to Barnet and Pacherová low GRP causes <230 Bq m-3 while medium GRP causes 230-460 Bq m-3 indoor radon concentration. From these different values of GRP a geogenic radon risk map was created, which assists human health risk assessment and risk reduction since it indicates the potential of the source of indoor radon. The results from this study shows that the region has background radioactivity levels within the natural limits.Abstract: In this study Soil gas radon 222Rn activity was measured in different locations at Al-Tuwaitha Nuclear Site and the surrounding areas using RAD7 (radon detector). Radon activity in the soil gas varied from (866±150 to 16004±521) Bq/m3 near Alaibtihal School and Ishtar \ Al-Ttakhi School respectively. These concentrations values are well below the a...Show More
