Article
Chemistry, Physical
A. M. Abdelghany, H. A. El-Batal, F. M. EzzEl-Din, N. ElAlialy, A. Okasha, D. Atta, A. M. Ismail, M. Abdelbaky, M. A. Aboelwafa, W. Awad
Summary: This study synthesized sodium borophosphate parent glass and derived samples containing different amounts of bismuth oxide. Fourier transform infrared spectroscopy was used to investigate the samples, and deconvolution analysis technique was employed to estimate the hidden or overlapped peaks. The study found that the IR spectra showed the presence of combined PO4 and BO3+BO4 groups upon adding Bi2O3.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Nuclear Science & Technology
M. R. Omar, W. M. H. Wan Mokhtar
Summary: This paper introduces a direct simulation method for estimating nuclide concentrations after transmutations. The method can simulate the transformation of nuclides and does not require solving Bateman equations. Verification with other studies demonstrates that the method is consistent and able to reproduce reference solutions.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Jieling Wang, Beini Xiong, Yichun Wu, Yang Bu, Yiru Pei, Yeyao Zheng
Summary: This study evaluates the performance of small modular reactors (SMRs) and their turbines in microgrid applications with intermittent renewable energy sources (RESs). The simulation analysis emphasizes the importance of the turbine's speed response capability in maintaining the stability of the grid frequency.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Chemistry, Physical
Arshiya Anees Ahmed, Ryszard Misiak, Miroslaw Bartyzel, Bogdan Was, Jerzy W. Mietelski
Summary: This study experimentally evaluated the excitation cross sections of Sc-47 and its accompanying impurities, comparing the results with previous measurements and predictions. The integral production yields of Sc-47 were found to be relatively high, and its relationship with Sc-44 and Sc-43 is significant for the use of Sc-47 as a therapeutic diagnostic agent.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Nuclear Science & Technology
Tamas Zoltan Hajas, Gabor Tolnai, Mark Margoczi, David Legrady
Summary: The Dynamic Monte Carlo (DMC) method is a relevant tool for kinetic calculations and simulations of coupled neutronics-thermal-hydraulics problems. It provides high fidelity calculations in detailed and complex geometries, but requires high computational resources. The stochastic nature of DMC results poses challenges in terms of stability and convergence in coupled DMC and thermal-hydraulics simulations. This paper introduces a Stochastic Differential Equations (SDEs) approach to connect the DMC method with differential equation formalism and presents a Non-Analog Monte Carlo (NAMC) model for the Stochastic Point-Kinetics equation (SPKe). Analytic solutions for random variates, reactor power expectation, and variance are given. A comparison is made between the analytic variance obtained from Monte Carlo simulations and the calculations from GUARDYAN code in different reactor models.
ANNALS OF NUCLEAR ENERGY
(2024)
Review
Nuclear Science & Technology
Xun Zhang, Hengdi Zhang, Jianfei Hou, Jing Xie, Xiangjie He, Hengyuan Si
Summary: The slow performance degradation and latent fault of equipment are difficult to detect from raw measurements, resulting in economic reduction and unplanned outage. A validation and monitoring system has been developed to evaluate the thermal performance of the overall thermodynamic cycle system and its equipment in real-time, taking into account the deviation of multiple measurements.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Nuclear Science & Technology
Qifan Yu, Yafeng Zhao, Yutong Chen, Zhipeng Liu, Chenglong Wang, Dalin Zhang, Wenxi Tian, Suizheng Qiu, G. H. Su
Summary: This study conducted numerical simulations of hyperbaric steam-water jet inside liquid lead bismuth eutectic using computational fluid dynamics. The simulations were compared against experimental data and sensitivity analyses were performed to study different thermal-hydraulics phenomena. The results provide an engineering basis for improving the safety margin of Lead-cooled Fast Reactor design.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Materials Science, Multidisciplinary
Gareth F. Stephens, Megan W. Owen, El Mehdi Ghardi, Alberto Fraile, Susan Ortner, Michael J. D. Rushton, William E. Lee, Aidan Cole-Baker, Simon C. Middleburgh
Summary: The presence of lithium in the coolant of nuclear reactors without boron has been found to accelerate the corrosion of zirconium alloys. Atomistic simulations have predicted a high solubility of lithium in amorphous structures, which could offer a mechanism for the observed lithium-accelerated corrosion of Zr-based alloys.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Nuclear Science & Technology
Muhammad Ali Khan, Muhammad Daniyal Khalid, Muhammad Ilyas, Muhammad Daniyal Nauman, Muhammad Asim, Khalid Waheed, Fatih Aydogan
Summary: An innovative twined tube heat exchanger design for advanced nuclear reactors is proposed, which is simple, robust, and efficient. Thermal-hydraulic investigations are performed through experiments and numerical simulations, showing that the performance factor of the twined tube heat exchanger is higher than that of straight tube heat exchanger, with a maximum enhancement of 60%. The proposed design is also easier to fabricate and maintain than helical coil heat exchangers.
ANNALS OF NUCLEAR ENERGY
(2024)
Article
Chemistry, Physical
Halime Kayakoku
Summary: Considering the importance of radiation retention properties of building materials, this study investigates the radiation absorbing properties of perlite, pumice, and Ahlat stones extracted from Bitlis province in Turkey. The research aims to find alternative materials with high absorption capability for the construction of nuclear power plants and radiation protection in other fields. The study compares the results with lead shield and suggests that a mixture of perlite and pumice formed into bims blocks shows better radiation trapping characteristics.
RADIATION PHYSICS AND CHEMISTRY
(2024)
Article
Instruments & Instrumentation
Catherine Burcklen, Cara Vennari, Christopher Mcguire, Jennifer Alameda, Jeff Robinson, Andrew Aquila, Matthew Seaberg, Klaus Sokolowski-Tinten, Thies J. Albert, Stefan P. Hau-Riege, Bernard Kozioziemski
Summary: In this work, the X-ray Tomographic dElay Line (XTEL) is introduced as an optical system for studying dynamics of mesoscale materials processes with X-ray light sources. The XTEL was tested on the MFX instrument and showed stable performance over multiple days. Additionally, a conceptual design for an XTEL-like optic with delays in the picosecond range is presented.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Nuclear Science & Technology
Akifumi Yamaji, Koki Matsuoka, Kota Sumida, Kohki Funatsu
Summary: The Supercritical Light Water-cooled Reactor (SCWR) is being developed based on matured Generation III light water-cooled reactor (LWR) technology and supercritical fossil fuel-fired power plant (SC-FPP) technology. The concept of SCWR has unique features such as a simple and compact plant system and high thermal efficiency. The research in Japan is focused on improving the resilience of SCWR. This study proposes the Resilient SCWR (SCWR-R) concept and presents its overall scope with two key viewpoints.
NUCLEAR ENGINEERING AND DESIGN
(2024)
Article
Instruments & Instrumentation
Weipeng Yan, Baojun Duan, Zijian Zhu, Yan Song, Guzhou Song, Jiming Ma, Binkang Li, Yucheng Liu
Summary: This article reports on the scintillation performance of Lithium-doped 2D (PEA)2PbBr4 perovskite single crystals synthesized at room temperature. The crystals exhibit fast decay time, high light yield, and high spatial resolution, making them highly promising for medical diagnostic applications.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Nuclear Science & Technology
M. Jafari, H. Jafari, M. H. Choopan Dastjerdi, J. Mokhtari
Summary: This study investigates the ability of the PGNAA facility of the Isfahan MNSR reactor to measure boron concentration in solution samples. A measurement system model is developed using Monte Carlo calculation, and a cadmium sheet is used to reduce the effect of boron in the shield. The accuracy of the model is verified through experimental tests, resulting in a calibration curve.
NUCLEAR ENGINEERING AND DESIGN
(2024)
Article
Nuclear Science & Technology
Qinjun Fu, Andre Bergeron, Philippe Fillion, Yohan Davit, Michel Quintard
Summary: In normal operating conditions, the flow within a pressurized water reactor (PWR) core primarily moves in the axial direction along the fuel rods. However, in accidents situations, transverse flows can have a significant impact on the thermal-hydraulic properties of the core. This study develops macroscopic pressure drop models for different flow directions and Reynolds numbers and validates them by comparing with existing system code results.
NUCLEAR ENGINEERING AND DESIGN
(2024)
Article
Instruments & Instrumentation
Taisei Hayashi, Kensei Ichiba, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: In this study, Cr-doped Mg4Ta2O9 single crystals with different doping levels were synthesized using the floating zone method, and their photoluminescence and scintillation properties were evaluated. The results showed that Cr-doped Mg4Ta2O9 single crystals exhibited broad emission bands in the near-infrared region and showed scintillation characteristics within specific wavelength ranges. Additionally, the samples with different Cr doping levels demonstrated different lower detection limits based on the dose rate response function.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
Article
Instruments & Instrumentation
Deb Sankar Bhattacharya, Andrea Bressan, Chandradoy Chatterjee, Silvia Dalla Torre, Mauro Gregori, Alexander Kiselev, Stefano Levorato, Anna Martin, Saverio Minutoli, Mikhail Osipenko, Richa Rai, Marco Ripani, Fulvio Tessarotto, Triloki Triloki
Summary: In this article, we report on the measurement of the time resolution of an LAPPD prototype using Cherenkov radiation emitted by high energy hadrons. Our approach has demonstrated the capability of measuring time resolutions as fine as 25-30 ps. The measured time resolution for single photoelectrons is about 80 ps r.m.s.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2024)
Article
Nuclear Science & Technology
Liwei Chen, Cong Zhou, Yu Wang, Yiran Zong, Tingting Lu, Chunhua Chen
Summary: This paper proposes an autonomous search method for leakage sources in nuclear emergency rescue based on the updated Infotaxis method. By considering factors such as radioactive decay and wet deposition, the method improves search efficiency and accuracy. Experimental results show that the method is particularly effective in searching for leakage sources under high emission rates and provides scientific information for early emergency response and consequence assessment.
NUCLEAR ENGINEERING AND DESIGN
(2024)
Article
Materials Science, Multidisciplinary
Pengcheng Zhu, Yajie Zhao, Yan-Ru Lin, Jean Henry, Steven J. Zinkle
Summary: This study investigates the effect of heavy-ion irradiation on radiation hardening in high-purity binary alloy Fe18Cr. Nanoindentation testing and high-quality TEM imaging were conducted to extract hardness and microstructure information. The strength factor was accurately calculated based on the detailed TEM characterization of irradiated microstructures, and a refined hardening superposition method was applied to quantify the mechanical properties of ion-irradiated materials.
JOURNAL OF NUCLEAR MATERIALS
(2024)
Article
Instruments & Instrumentation
Junjie Shi, Jianhong Hao, Fang Zhang, Qiang Zhao, Bixi Xue, Jieqing Fan, Zhiwei Dong
Summary: This study examined the neutralization process and beam quality of a hydrogen beam by emitting negative hydrogen ions to a hydrogen target. The findings showed that the neutralization efficiency was influenced by variables such as the transport distance, energy, and target gas density. However, the maximal neutralization efficiency was not affected by the density of the target gas or the energy of the negative hydrogen ions.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS
(2024)
