Quang-Thien Tran

• Master of Science
• Researcher at Nuclear Research Institute, Da Lat, Viet Nam

This study combines the FLEXPART atmospheric transport model with the DELFT-3D marine hydrodynamic model to simulate the short-term dispersion of Cs-137 in the East Vietnam Sea following a hypothetical nuclear accident at the Fangchenggang Nuclear Power Plant. Atmospheric deposition from FLEXPART serves as the source term input for marine dispersio...

This study investigates the quantities of Rare Earth Elements (REEs) and Potentially Toxic Elements (PTEs) in Dong Nai Province's surface soils. Atomic Absorption Spectrometry (AAS) and Instrumental Neutron Activation Analysis (INAA) were used to determine element concentrations. To validate the concentration results, established reference material...

This study presents a dual method for neutron flux self-monitoring and quality control in the k0-based neutron activation analysis (k0-NAA) using the Synthetic Multi-Element Standards (SMELS). SMELS comprise three distinct types, designated as Type I for short-lived, Type II for medium-lived, and Type III for long-lived radionuclides, all of which...

This study investigates the quantities of Rare Earth Elements (REEs) and Potentially Toxic Elements (PTEs) in Dong Nai Province's surface soils. Atomic Absorption Spectrometry (AAS) and Instrumental Neutron Activation Analysis (INAA) are used to determine element concentrations. To validate the concentration results, established reference materials...

Only about 50 km from the Quang Ninh coastal area in Vietnam, the Fangchenggang Nuclear Power Plant (China) operation causes excellent concerns for the environment, especially the marine environment, if an incident occurs. Based on topographic and hydrometeorological data and assumptions about radiation release conditions when an incident occurs, t...

Applications for machine learning (ML), deep learning, and other artificial intelligence models have shown great promise in nuclear physics, including not only in classification systems but also in the analysis of numerical data. This study used various ML algorithms to estimate the concentrations of six rare earth elements (Sm, La, Ce, Sc, Eu, and...

The use of nuclear techniques for elemental analysis has been successfully developed in many laboratories in the IAEA Member States, including Vietnam. Nuclear techniques have also been proven to be extremely powerful in provenancing samples relevant to forensics. In the framework of the CRP project on Enhancing Nuclear Analytical Techniques to Mee...

In this study, the k0 factors of 7 short and medium-lived radionuclides (i.e. 66Cu, 52V, 38Cl, 134mCs, 128I, 140La and 56Mn) were experimentally determined at the Dalat nuclear research reactor (DNRR). The synthetic multi-element standard (SMELS) samples were irradiated at Channel 7-1 installed at the DNRR. SMELS Type III contains Au and Zr, thus a...

The k0-based neutron activation analysis (k0-NAA) and Particle-induced X-ray emission (PIXE) have been performed for 48 automobile window glass samples in forensic applications. A total of 29 elements determined by both k0-NAA and PIXE techniques in the glass are: Al, Ba, Ca, Ce, Cl, Co, Cs, Cu, Eu, Fe, Hf, K, La, Mg, Mn, Na, Ni, Rb, S, Sc, Si, Sm,...

Because its location is quite close to the Vietnamese border, the future operation of the Fengcheng (Phong Thanh) nuclear power plant (NPP) can raise many concerns about the impact on the marine environment in case a serious incident occurs. Based on the Delft3D modeling toolkit, calculation scenarios to simulate the spreading of Cs-137 radioactive...

The activity concentrations of naturally occurring radionuclides 226Ra, 232Th, and 238U were determined in marine sediments, seawaters and seafood along the Gulf of Vietnam to establish baseline data for future environmental monitoring at a surface water depth of 0–3 cm. The concentration of uranium, thorium and radium were determined using a low b...

Epithermal Neutron Activation Analysis (ENAA) in which the resonance reactions are utilised by using a cadmium filter to remove thermal neutrons from the reactor spectrum and measuring decay gamma rays leads to an improved detection limit for a number of elements with the resonance integrals higher than the thermal cross-sections. A computer progra...

The elemental concentration and grain size composition (sand, silt and clay) of 63 bulk estuarine sediment samples from the bank of the Hau River in Mekong Basin were analyzed by neutron activation analysis and laser-diffraction particle size analyzer in this study. Principal component analysis was used to investigate the association between elemen...

This study presents the initial results in analyzing the composition of 29 copper coin samples collected in Pang Tieng village, Lat commune, Lac Duong district by X-ray fluorescence (XRF) analysis, and statistical, data processing methods to provide a new perspective in the study of metal coins in Lam Dong. Correlation statistical operations, clust...

Meeting the electrical energy needs for socio-economic development, a variety of Chinese nuclear power plants have been built. Among them, Fangchenggang and Changjiang Nuclear Power Plant are located very close to the Vietnam border. They are causing significant environmental concerns to the Vietnamese seas if have any incident occurs. Based on the...

In this study, we measured the activity concentrations of Cs-137 and Sr-90 in surface seawater and surface sediments at the Tra Co, Bach Long Vi, and Ky Anh locations in the Gulf of Tonkin, Vietnam, from December 2018 to October 2019. The average activity at the selected locations was 1.22, 1.43, and 1.33 Bq/m³ for Cs-137 and 0.88, 1.17, and 1.09 B...

The γ - MnO2 nanomaterial has been used to adsorb cobalt in the seawater at Phan Thiet City, Binh Thuan Province, Vietnam. Its concentration is determined by using the neutron activation analysis (NAA) method at the Dalat nuclear research reactor. Factors affecting the uptake of cobalt on the γ - MnO2 material such as the pH, adsorption time, and i...

The cyclic neutron activation analysis (CNAA) facility based on a pneumatic transfer system for short irradiation and rapid counting has recently been upgraded at the Dalat research reactor. The original facility was only designed for single irradiation. Therefore, this work has aimed to upgrade both hardware and software for the cyclic irradiation...

INAA, ICP-AES and ICP-MS were utilised to elementally characterise four environmental reference materials (NIST SRM 1646a (Estuarine Sediment), NIST SRM 1400 (Bone Ash), IAEA-395 (Urban Dust) and IAEA-450 (Algae)). An analytical scheme consisting of the three analytical methods was first applied to NIST SRM 1646a to validate the methodology because...

Quality evaluation of the k 0-standardized neutron activation analysis (k 0-NAA) at Dalat research reactor (DRR) has been implemented by analyzing the SMELS, a synthetic multi-element standard material as well as the certified reference materials for purposes of validation and verification of the method. The results revealed that the k 0-NAA establ...

The k 0-standardized neutron activation analysis (k 0-NAA) has been applied for determination of multiple elements (25 elements: Al, As, Ba, Br, Ca, Cl, Co, Cr, Cs, Cu, Eu, Fe, Hg, K, La, Mg, Na, Rb, Sc, Se, Sm, Th, Ti, V and Zn) in marine sediment and tuna fish. About 50 marine sediment and 9 tuna fish samples were collected in two coastal areas o...

The combination and optimization of the cyclic modes in neutron activation analysis (NAA) at the Dalat research reactor were performed to determine short-lived nuclides. This work focused on determination of selenium in biological materials using 77mSe (T 1/2 = 17.4 s) as a case in point. The detection limit was significantly improved by a factor o...

The k0-based neutron activation analysis (k0-NAA) has been applied for determination of trace multi-element in 5 fruits: Orange, tomato, persimmon, pear and apple. The samples were collected in Vietnam and Korea, and dried-frozen in laboratory at a temperature of -650C, weighed approximately 50 mg or 100 mg each sample, and put in clean polyethylen...

In this study, 55 samples of stone artifacts at some prehistory monuments in Lam Ha District. The concentration of 24 elements: Al, V, Mn, Cl, Na, K, As, La, Sm, Sc, Cr, Fe, Co, Rb, Sb, Cs, Ce, Nd, Eu, Tb, Yb, Hf, Ta, Th in these stone artifacts were analyzed by instrumental neutron activation analysis (INAA). The elements’ concentration of the sto...

In this paper. the authors introduce the principle and the application of Neutron activation analysis and Methods of Multivariate Analysis in the research on stone artifacts from the settlement - stone making workshop sites in Tây Nguyên. From the analysis of the stone samples from some archaeologial sites in Lâm Đồng, Gia Lai and Đắk Nông province...

A rapid neutron activation analysis technique for determination of the concentration of selenium in biological materials using short-lived radionuclide 77mSe (half-life = 17.4 seconds) has been developed at Dalat Nuclear Research Institute (DNRI). The technique is very simple and rapid. It involves irradiation of a sample for 20 s, decay for 20 s a...

An auto-pneumatic transfer system has been installed at the Dalat research reactor for rapid instrument neutron activation analysis based on very short-lived nuclides. This system can be used to perform short irradiations in seconds either in the vertical channel 13-2 or in the horizontal thermal column of the reactor. The transferring time of samp...

White rice is a main food for Asian people. In the framework of Forum for Nuclear Cooperation in Asia (FNCA), therefore, the eight Asian countries: China, Indonesia, Japan, Korea, Malaysia, the Philippines, Thailand and Vietnam selected white rice as a common target sample for a collaboration study since 2008. Accordingly, rice samples were purchas...