Journal of Nuclear Engineering and Radiation Science: Recent submissions
Now showing items 261-280 of 913
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Photodegradation of Molecular Iodine on SiO2 Particles: Influence of Temperature and Relative Humidity
(The American Society of Mechanical Engineers (ASME), 2021)A molecular derivatization method followed by gas chromatographic separation coupled with mass spectrometric detection was used to study photodegradation of molecular I2 adsorbed on solid SiO2 particles. The heterogeneous ... -
Safety Analysis of Indonesia's Multipurpose Reactor During Irradiation of Natural UO2 Pin Target at Power Ramp Test Facility
(The American Society of Mechanical Engineers (ASME), 2021)To support the utilization of the power ramp test facility (PRTF) at the reactor Serba Guna GA Siwabessy (RSG-GAS) reactor, the investigation of safety parameters both on the target and the reactor during the irradiation ... -
Numerical Modeling and Experimental Validation of a Supercritical CO2-Lubricated Hydrodynamic Journal Bearing
(The American Society of Mechanical Engineers (ASME), 2021)The supercritical carbon dioxide (sCO2) Brayton cycle is an attractive thermal cycle for compact power generation applications due to its high efficiency and power density. Hydrodynamic gas journal bearings are attractive ... -
Deuterium Ingress at the Rolled Joints in CANDU Reactors: Where Does It Come From and How Can It Be Reduced?
(The American Society of Mechanical Engineers (ASME), 2021)Simple, small-scale, experiments demonstrate that the initial protium in stainless-steel end fittings contributes to the high deuterium concentrations found in the zirconium pressure tubes at CANDU rolled joints. This ... -
Maintenance Factors Affecting Increased Lutetium-177 Production
(The American Society of Mechanical Engineers (ASME), 2021)With lutetium (Lu-177) demand forecasted to increase following the conclusion of clinical trials and product registration in key jurisdictions, manufacturers are seeking to improve their production outputs. Naturally, the ... -
Machine Learning-Based Methodology for Assessment of Doppler Reactivity of Sodium-Cooled Fast Reactor
(The American Society of Mechanical Engineers (ASME), 2021)In order to close nuclear fuel cycle and address the problem of sustainability, advanced nuclear reactor systems of the fourth generation are in the focus of the research for many years. With a simple goal of supporting ... -
Visualization of Radioactive Substances Using a Freely Moving Gamma-Ray Imager Based on Structure From Motion
(The American Society of Mechanical Engineers (ASME), 2021)Technology for measuring and identifying the positions and distributions of radioactive substances is important for decommissioning work sites at nuclear power stations. A three-dimensional (3D) image reconstruction method ... -
Feasibility Study of the One-Dimensional Radiation Distribution Sensing Method Using an Optical Fiber Sensor Based on Wavelength Spectrum Unfolding
(The American Society of Mechanical Engineers (ASME), 2021)We propose a novel one-dimensional radiation distribution sensing method using an optical fiber sensor based on wavelength spectrum unfolding for the application in the measurement of the high dose rate hot spots inside ... -
A Simplified Algorithm for Count Rate Processing in Radiation Monitors That Address Statistical Fluctuations and Spurious Counts
(The American Society of Mechanical Engineers (ASME), 2021)While processing the signals from radiation detectors, for finding the true mean-count-rate, algorithms with hybrid pulse collection methodology have been proposed and used over the years. An algorithm based on this technique ... -
Systematic Approach to Transboundary Radioactivity Monitoring for Accidents in External Nuclear Power Plants
(The American Society of Mechanical Engineers (ASME), 2021)Past nuclear accidents demonstrated that radioactive materials from an accident in a nuclear power station (NPS) can disperse to other countries or even across the globe. This means all countries need to be prepared to ... -
Comparative Study of Physical Models for Particle Sedimentation Using SIMMER Code
(The American Society of Mechanical Engineers (ASME), 2021)In the context of improved safety requirements for Generation IV sodium-cooled fast reactors (SFR), an innovative severe accident mitigation scenario is being investigated. In the French frame of SFR research, the mitigation ... -
Computational Fluid Dynamics Simulations of the Cold Neutron Source at the OPAL Reactor
(The American Society of Mechanical Engineers (ASME), 2021)The open pool Australian light-water (OPAL) reactor cold neutron source (CNS) is a 20 L liquid deuterium thermosiphon system which has performed consistently but will require replacement in the future. The CNS deuterium ... -
Preliminary Assessment of Decay Heat Removal Systems in the ESFR-SMART Design: The Role of Natural Air Convection Around Steam Generators Outer Shells in Accidental Conditions
(The American Society of Mechanical Engineers (ASME), 2021)In the frame of the ESFR-SMART European project, aiming at improving the safety level of the European sodium cooled fast reactor (ESFR), this paper presents the preliminary assessment of decay heat removal systems (DHRSs) ... -
Developing and Implementing Artificial Intelligence-Based Classifier for Requirements Engineering
(The American Society of Mechanical Engineers (ASME), 2021)In nuclear power plant (NPP) projects, requirements engineering manages the sheer volume of requirements, typically characterized by descriptive and nonharmonized requirements. Large projects may have tens of thousands to ... -
Development and Verification of Multiphysical Coupling Calculation Code for Typical Pressured Water Reactor Core
(The American Society of Mechanical Engineers (ASME), 2021)Strong feedback phenomenon between the reactor physical and thermal-hydraulic has an important impact on the design and safety analysis of pressured water reactor (PWR). In order to accurately simulate the strong coupling ... -
Modeling and Simulation of Subcooled Coolant Loss Through Circumferential Pipe Leakage
(The American Society of Mechanical Engineers (ASME), 2021)This work demonstrates the leak flow behavior of subcooled water at high pressure and high temperature through a narrow slit analogous to a pipe crack. The modeling and simulations are based on the loss of coolant accident ... -
Prediction of Potential Offsite TEDE, Excess Cancer Risk, Dominant Exposure Pathways, and Activity Concentration for Hypothetical Onsite Soil Contamination at the Proposed Rooppur Nuclear Power Plant
(The American Society of Mechanical Engineers (ASME), 2021)This study evaluates the potential offsite radiological hazards by calculating total effective dose equivalent (TEDE) and excess cancer risk if onsite soil contamination occurs at the proposed Rooppur Nuclear Power Plant ... -
Radioactivity and Elements Measurements From Lagoon of Cocody Area District of Abidjan (Côte d'Ivoire)
(The American Society of Mechanical Engineers (ASME), 2020)The aim of this study was to assess radio activity and elements levels of Ebrié lagoon water in Abidjan, Côte d'Ivoire. Eight bottles of water from Ebrié lagoon were taken for the study. This study was achieved by measuring ... -
Guided Waves Measurement Techniques in Pitch–Catch Configuration
(The American Society of Mechanical Engineers (ASME), 2021)Guided waves (GWs) testing allows a long-range screening in pipes of different types and represents an effective and powerful nondestructing technique for defect detections using a limited number of points of measures. ... -
Radiological Risk Assessment of Radon Gas in Bricks Samples in Iraq
(The American Society of Mechanical Engineers (ASME), 2021)Naturally occurring radioactive radon gas is produced from radioactive decay of naturally radioactive element radium and emits alpha particles. The radon gas is the main source of natural background radiation that contributes ...