Article
Environmental Sciences
S. Salazar, L. A. Castillo, L. Montes
Summary: This study evaluated and characterized the activity concentrations of naturally occurring radioactive elements in the Rancheria Sub-Basin. Results showed that most samples had activity concentrations within acceptable global averages, but some areas had higher concentrations, particularly associated with lithology.
Article
Environmental Sciences
Dariusz Malczewski, Maria Dziurowicz, Zdenek Kalab, Marketa Rosnerova
Summary: This study reports the natural radioactivity of characteristic rocks found in the historic Jeronym Mine of the Czech Republic, confirming that these rocks meet safety standards for building materials and do not pose a risk to potential tourists and staff.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Chemistry, Analytical
R. S. Attia, E. S. Abd El-Halim, Ibrahim E. El Aassy, A. El-Shershaby, H. A. Abdel Ghany
Summary: The study found high concentrations of natural radioactivity and associated hazard indices in eleven sedimentary rock samples collected from southwestern Sinai.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Morteza Imani, Mohammademad Adelikhah, Amin Shahrokhi, Ghazaleh Azimpour, Ali Yadollahi, Erika Kocsis, Edit Toth-Bodrogi, Tibor Kovacs
Summary: The radiological survey conducted in Semnan Province, Iran, measured activity concentrations of Ra-226, Th-232, and K-40 in common building materials. Statistical analysis including Pearson correlation, cluster, and principal component analyses indicated that the main radiological health hazard parameters are related to the concentrations of Ra-226 and Th-232.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Nuclear Science & Technology
Md Abu Haydar, Md Mehade Hasan, Imrose Jahan, Kanij Fatema, Md Idris Ali, Debasish Paul, Mayeen Uddin Khandaker
Summary: The Rooppur Nuclear Power Plant in Bangladesh is under construction with a capacity of 2.4 GWe, and measurement of background radioactivity in the natural environment nearby is crucial. Analytical results indicate significant radiation hazards to the surrounding populace.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Asli Kurnaz, Seref Turhan, Fatma M. N. S. Alzaridi, Temel Kan Bakir
Summary: The study found that the average activity concentration of Ra-228 in drinking waters in Kastamonu province exceeded the WHO recommended concentration.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
G. Bilgici Cengiz, I Caglar
Summary: This study evaluated the distribution of natural radionuclides in various foods commonly consumed by people in Turkey and the radiation hazards that may arise from consuming these foods. The results showed that the concentrations of radionuclides in the analyzed food samples were within the internationally approved values.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Environmental Sciences
Pinar Isel, Latife Sahin, Nurgul Hafizoglu, Ela Ganioglu, Aysegul Mulayim
Summary: This study measured the concentrations of natural and artificial radionuclides in sediment and soil samples from the Bosphorus in Istanbul using gamma-ray spectrometry. The results showed average activity concentrations of U-238, Th-232, K-40, and Cs-137 in sediment samples to be 11.41 +/- 0.21 Bq kg(-1), 6.87 +/- 0.16 Bq kg(-1), 369.61 +/- 3.41 Bq kg(-1), and 6.54 +/- 0.11 Bq kg(-1) respectively, and in soil samples to be 11.65 +/- 0.18 Bq kg(-1), 9.55 +/- 0.15 Bq kg(-1), 369.43 +/- 3.09 Bq kg(-1), and 4.57 +/- 0.09 Bq kg(-1) respectively. Radiological contour maps were created based on the activity concentrations of radionuclides in the sediment samples, and the total annual effective dose due to soil samples was calculated to be 34.58 mu Sv y(-1).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Analytical
B. Jananee, A. Rajalakshmi, V. Thangam, K. Manikanda Bharath, V. Sathish
Summary: The study aimed to determine the activity concentrations of natural radionuclides and associated radiation hazards in soils of Elephant hills, Tamil Nadu, India using gamma-ray spectrometry. Results showed that the average dose rate was higher than the global average, while the average annual effective dose equivalent was below the recommended limit, with K-40 not contributing significantly to the radioactivity in these soils.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Environmental Sciences
Lubna A. Alasadi, Ali Abid Abojassim
Summary: This study aimed to detect and map the natural radioactivity levels of uranium-238, thorium-232, and potassium-40 in soil samples from Kufa districts, Najaf governorate, Iraq. The results showed that the specific activity of these radionuclides in all soil samples were within the safety limits, except for three samples with higher potassium-40 levels.
ENVIRONMENTAL EARTH SCIENCES
(2022)
Article
Chemistry, Inorganic & Nuclear
Jiangpeng Dong, Tao Bai, Yihua Dai, Xiangbo Zhang, Jinlong Fan, Yaowen Hu, Xiaojing Song, Yan Ma, Liangliang Miao, Quanlin Shi, Zhiming Li
Summary: In this study, the half-life of 111Ag was determined to be 7.437(7) days, which is consistent with recent findings.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Environmental Sciences
Ali Abid Abojassim, Leith Hani Rasheed
Summary: The study collected soil samples from different residential areas in Baghdad to measure the specific gamma-ray activity of naturally occurring radionuclides. Results show that the natural radioactivity lies within the acceptable level, except for one sample that needs further study. GIS tools were used to map the specific activity for all samples in the study.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Chemistry, Analytical
Gebi Tuku Yachiso, A. K. Chaubey, Birhanu Turi
Summary: In this study, the activities concentration of radionuclides in soil, teff, and wheat samples from the Sakaro gold mining area in Ethiopia were measured. The transfer factors from soil to cereal crops were compared with values from other countries, showing that most of the transfer factors were below unity. The estimated dose rates and risks did not exceed internationally accepted values.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Kaan Manisa, Mehmet Erdogan, Ali Usluer, Hakan Cetinkaya, Ulas Isik, Latife Sahin, Veysel Zedef
Summary: By measuring the activity concentrations of Rn-222 in well waters and natural spring waters in the Corlu region, as well as the activity concentrations of U-238, Th-232, and K-40 in soil samples, it was found that most of the results were within the safe limits recommended by the WHO and UNSCEAR, except for the slightly higher mean specific activity of K-40 radionuclide.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Chemistry, Analytical
Fei Tuo, Xuan Peng, Zhi Zeng, Xuan Zhang, Qiang Zhou, BaoLu Yang, Jing Zhang
Summary: This study presents an analysis of natural radioactivity in soils collected around the Chinese Nuclear Test site. The radioactivities of U-238, Ra-226, Th-232, K-40, and Cs-137 were determined using HPGe gamma-ray spectrometry, and the potential radiological hazards were evaluated. Depth profiles of radionuclides in three selected areas of Gansu were analyzed, and a new method for detecting Cs-137 specific activities was measured using an ultra-low background gamma spectrometer named GeTHU-II developed by Tsinghua University at China Jinping Underground Laboratory. The radioactivity concentrations of Cs-137 were found to be significantly different in these three areas, gradually decreasing from the surface to 15 cm underground.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2021)
Article
Physics, Multidisciplinary
M. E. Medhat, S. P. Shirmardi, V. P. Singh
PRAMANA-JOURNAL OF PHYSICS
(2017)
Article
Materials Science, Multidisciplinary
M. E. Medhat, A. Abdel-hafiez, V. P. Singh
Article
Gastroenterology & Hepatology
Ashraf O. Abdelaziz, Mohamed M. Nabil, Ahmed H. Abdelmaksoud, Hend I. Shousha, Ahmed A. Cordie, Eman M. Hassan, Dalia A. Omran, Rania Leithy, Tamer M. Elbaz
EUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
(2018)
Article
Gastroenterology & Hepatology
Ashraf O. Abdelaziz, Mohamed M. Nabil, Ahmed H. Abdelmaksoud, Hend I. Shousha, Mohamed B. Hashem, Eman M. Hassan, Ayman Salah, Dalia A. Omran, Tamer M. Elbaz
EUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
(2019)
Article
Gastroenterology & Hepatology
Hend Ibrahim Shousha, Karim Akl, Sherif Ragheb, Eman Medhat, Gamal Esmat
Article
Virology
Ayman Yosry, Hadeel Gamal Eldeen, Eman Medhat, Mai Mehrez, Naglaa Zayed, Wafaa Elakel, Reham Abdelmoniem, Mona Kaddah, Ashraf Abdelaziz, Gamal Esmat, Magdy EL-Serafy, Wahid Doss
JOURNAL OF MEDICAL VIROLOGY
(2019)
Article
Nuclear Science & Technology
M. E. Medhat
RADIATION EFFECTS AND DEFECTS IN SOLIDS
(2019)
Article
Gastroenterology & Hepatology
Samar K. Darweesh, Heba Omar, Eman Medhat, Rasha A. Abd-Al Aziz, Hedy Ayman, Yasmin Saad, Ayman Yosry
EUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
(2019)
Article
Materials Science, Multidisciplinary
A. M. M. Elsayed, M. E. Medhat, S. Amanzholova
RESULTS IN PHYSICS
(2020)
Article
Chemistry, Physical
Jie Liu, A. M. M. Elsayed, M. E. Medhat
Summary: This study discusses the applications of neutron generators in science and technology, as well as the design and construction of neutron generators for elemental analysis. The research also evaluates the impact of source errors on the concentrations of certain elements in specific samples, estimating a total error of 5-7%.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Chemistry, Physical
Jie Liu, Song-lin Liu, M. E. Medhat, A. M. M. Elsayed
Summary: The objective of this study was to propose a novel algorithm for processing gamma-ray spectra based on the theory of wavelet. The mathematical principles of applying the wavelet transform method in processing gamma-ray spectra and removing fluctuations and background were discussed. The wavelet algorithm accurately detects most peaks and determines the net area under the peaks.
RADIATION PHYSICS AND CHEMISTRY
(2023)
Article
Biotechnology & Applied Microbiology
Ghada M. Salum, Mai Abd el Meguid, Tawfeek H. Abelhafez, Eman Medhat, Ashraf O. Abdel Aziz, Reham Dawood
Summary: This study analyzed the association of cirrhosis risk score (CRS) and other clinical parameters with the likelihood of hepatocellular carcinoma (HCC) emergence and/or the rate of hepatitis C virus (HCV) recurrence following liver transplantation. The results showed that factors such as donor steatosis and abnormal ALT levels were more likely to promote HCV recurrence post-OLT, while the CRS score was found to be less useful in predicting HCV recurrence.
JOURNAL OF GENETIC ENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Hematology
Jan Beyer-Westendorf, A. John Camm, Keith A. A. Fox, Jean-Yves Le Heuzey, Sylvia Haas, Alexander G. G. Turpie, Saverio Virdone, Ajay K. Kakkar
THROMBOSIS JOURNAL
(2019)
Article
Immunology
Eman Medhat, Raghda N. Marzaban, Reham A. Dwedar, Alaa M. Reda, Laila Rashid, Taref Al-Enezi
INFECTIOUS DISEASES IN CLINICAL PRACTICE
(2017)
Article
Physics, Multidisciplinary
M. E. Medhat, V. P. Singh
INDIAN JOURNAL OF PURE & APPLIED PHYSICS
(2016)
Article
Nuclear Science & Technology
Kecheng Jiang, Jinzhao Yang, Xueli Zhao, Lei Chen, Fujun Gou, Songlin Liu
Summary: The blanket, as a key component of the fusion reactor, plays important roles in breeding tritium, shielding neutrons, and extracting thermal energy for electricity generation. Understanding the characteristics of gas-liquid two-phase flow and mass transfer is essential for optimizing the design of tritium extraction units in the blanket.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Anna-Elina Pasi, Teemu Karkela, Fredrik Borjesson Sanden, Unto Tapper, Tuula Kajolinna, Christian Ekberg
Summary: This study investigates the gas-phase interactions between tellurium and organic material under severe nuclear accident conditions. The results show that there is interaction between tellurium aerosols and organic material, leading to an increase in the gaseous fraction and changes in XPS spectra. Although the exact species are not identified, these findings raise questions about the behavior of tellurium and its reactions with organic material in severe accident conditions.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Ao Zhang, Qingye Li, Chaoyong Zong, Fuwen Liu, Tianhang Xue, Jian Xiao, Xueguan Song
Summary: In this study, a high-fidelity computational fluid dynamics model was established to investigate the flow characteristics of a novel balanced globe valve. The study found that the size of the throttle orifice and valve disc displacement have a significant impact on fluid force. The findings provide a basis for the design and dynamic control of globe valves, and also have potential value for energy utilization.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Wenbo Li, Yunqing Bai, Shuai Zhang, Yang Li, Ming Jin, Chunjing Li
Summary: In this study, a 3D-CFD model based on the SUPERCAVNA facility was established to analyze thermal stratification in liquid-metal-cooled nuclear reactors. The results show that the SKE model is the most accurate in predicting temperature distribution, and further parametric studies were conducted.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Song Jin, Di Jiang, Dongmei Wang, Shaojie Wang, Zhen Wang
Summary: This study presents the fragility evaluation of a nuclear containment structure subjected to earthquake and subsequent internal pressure sequence. Nonlinear finite element model and ground motion records are used to analyze the nonlinear response and fragility of the structure. Results show that the distribution of maximum strain and displacement of the structure under earthquake and subsequent pressure are significantly different, with displacement distribution related to ground motion intensity levels.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Kazumasa Shimada, Tatsuya Sakurahara, Pegah Farshadmanesh, Seyed Reihani, Zahra Mohaghegh
Summary: This research improves the realism of Level 3 probabilistic risk assessment for nuclear power plants by modeling the evacuation behavior of residents and incorporating two advancements. The first advancement uses evacuation speed from a transportation simulation code as input to the Level 3 PRA code, enabling explicit incorporation of spatiotemporal evacuation processes. The second advancement incorporates the probability of seismic damage to roadway bridges into Level 3 PRA and calculates evacuation routes and speeds considering the impact of seismic damage.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
F. Mascari, A. Bersano, M. Massone, G. Agnello, O. Coindreau, S. Beck, L. Tiborcz, S. Paci, M. Angelucci, L. E. Herranz, R. Bocanegra, Y. Pontillon, M. Berdai, O. Cherednichenko, A. Iskra, M. Nudi, P. Groudev, P. Petrova, F. Kretzschmar, F. Gabrielli, Z. Kanglong, V. Vileiniskis, T. Kaliatka, J. Kalilainen, M. Malicki, D. Gumenyuk, Y. Vorobyov, O. Kotsuba, P. Dejardin, M. Di Giuli, R. Thomas, I. V. Ivanov, F. Giannetti, M. D'Onorio, G. Caruso, M. Salay, T. Sevon
Summary: The MUSA project aims to analyze uncertainties and sensitivities associated with severe accidents using a harmonized approach, particularly focusing on source term figures of merit. The project applied and tested uncertainty quantification methodologies using the PHEBUS FPT1 test. The study found that scripting for coupling SA codes and uncertainty tools can increase flexibility, and careful consideration should be given to selecting the input uncertain parameters.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Ian Greenquist, Nathan Capps
Summary: The US nuclear energy industry is investigating strategies to increase reactor operating cycle to 24 months. Multiphysics simulations tools and methodologies are being developed to predict the effects of this change during transient events such as loss-of-coolant accidents (LOCAs).
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Guangchun Zhang, Hu Zhang
Summary: In this study, a neutron transport code called TARS is introduced, which is based on the discrete-ordinates discontinuous finite element method. TARS provides accurate and efficient solutions to the neutron transport equation, addressing existing challenges in the field. The evaluation results demonstrate that TARS generates highly accurate solutions and achieves high parallel computation efficiency.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
J. R. Daniels, M. M. R. Williams, M. D. Eaton
Summary: This paper presents the development and verification of a collision probability (CP) code for neutron transport in slabs and cylinders. The CP code is particularly useful for modelling layered systems of aqueous and organic plutonium nitrate. The code provides a computationally inexpensive alternative to higher fidelity codes like MCNP. It is effective for slab geometries with at least 0.7 g cm-2 plutonium, but its approximation for heterogeneous cylinders can lead to overestimation of neutron leakage. Increasing the cylinder radius to 40.0 cm improves the accuracy for systems with at least 2.75 kg plutonium. However, the code's accuracy decreases when modelling cylindrical geometries with dished ends and low plutonium content.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Alexander A. Ryzhkov, Georgy V. Tikhomirov, Mikhail Yu. Ternovykh
Summary: This paper analyzes the impact of nuclear data uncertainties on the safety of advanced reactors, with a specific focus on angular distribution uncertainties. Through sensitivity and uncertainty analysis, key parameters for MOX3600 are identified, and a comparison of different libraries' uncertainties on the eigenvalue is performed.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Y. Fontenla, A. Vidal-Ferrandiz, A. Carreno, D. Ginestar, G. Verdu
Summary: FEMFFUSION is an open source code that solves the multigroup neutron transport equation using the diffusion and the SPN approximations. It uses the finite element method to handle various geometries and problem dimensions, and has been verified against the C5G7 benchmark.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
J. Tyler Gates, Pavel V. Tsvetkov
Summary: The Optical Fiber Based Gamma Thermometer utilizes optical fiber as a distributed temperature sensor to measure the temperature of a thermal mass undergoing gamma heating and calculate the gamma flux data. This technology shows promise in determining the local power density within a nuclear reactor core and provides an unparalleled level of precision in reactor power measurement.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
A. de Lara, A. Schubert, E. Shwageraus, P. Van Uffelen
Summary: This study presents a new methodology to derive the radial form factor in the TRANSURANUS burnup model using simulations. The proposed methodology can be applied to different types of reactors, including LWRs and HWRs, and is suitable for advanced technology fuels.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
A. Bousbia Salah, M. Di Giuli, P. Foucaud, R. Iglesias, A. Malkhasyan, M. Salmaoui, L. E. Herranz
Summary: In the framework of the R2CA project, the application of advanced codes for evaluating radiological release under design basis accidents was considered. The study focused on a specific scenario and assessed the results obtained by different organizations using different computational tools and approaches. The outcomes highlighted modeling differences and challenges in carrying out such analysis.
ANNALS OF NUCLEAR ENERGY
(2024)
