scholarly journals Colombian Neutron Activation Analysis Laboratory (CNAAL): Applications and Development Using the Nuclear Research Reactor IAN-R1

2019 ◽  
Author(s):  
Guillermo Parrado ◽  
David Alonso ◽  
Julián Orozco ◽  
Mary Peña ◽  
Andrés Porras ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Research Reactor ◽  
Nuclear Research ◽  
Nuclear Research Reactor ◽  
Analysis Laboratory

Calibration Of The Short Irradiation Facility For k0 - NAA Implementation At The IEA-R1 Reactor

2021 ◽  
Vol 9 (1A) ◽  
Author(s):  
João Pedro Oliveira Flores ◽  
Paulo Sérgio Cardoso Silva ◽  
Mauro Silva Dias ◽  
Marina Fallone Koskinas ◽  
Denise Simões Moreira ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Gamma Ray ◽  
Nuclear Research ◽  
Short Irradiation ◽  
Gamma Ray Spectrometer ◽  
Analysis Technique ◽  
Nuclear Research Reactor ◽  
Analysis Laboratory

The short irradiation facility of the IEA-R1 nuclear research reactor at IPEN, São Paulo,  Brazil, has been used for short irradiation of samples for the purpose of determining the concentration of elements of these samples through the use of the instrumental neutron activation analysis technique. With the aim of implementing the k0-NAA method at the Neutron Activation Analysis Laboratory (LAN), the reactor parameters a and f were obtained using the bare triple method. In this method, a set of three neutron flux monitors were irradiated without Cd-cover. The efficiency curve of the gamma-ray spectrometer used was determined by measuring calibrated radioactive sources at the commonly used counting geometries. The results for the parameters a and f were respectively 0.0384±0.0016 and 35.67±0.26. This value of f shows that the neutrons in the irradiation position are well thermalized.The variation of these parameters was studied with time and the reproducibility was verified.  

scholarly journals Determination of Cobalt in Seawater Using Neutron Activation Analysis after Preconcentration by Adsorption onto γ-MnO2 Nanomaterial

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Van-Phuc Dinh ◽  
Ngoc-Chung Le ◽  
Ngoc-Tuan Nguyen ◽  
Quang-Thien Tran ◽  
Van-Dong Nguyen ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Research Reactor ◽  
Nuclear Research ◽  
Adsorption Efficiency ◽  
Experiment Data ◽  
Factors Affecting ◽  
Nuclear Research Reactor

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 initial cobalt(II) concentration are investigated. The irradiated experiment data are calculated using the K0-Dalat program. The results obtained show that the trace dissolved cobalt in Phan Thiet seawater is found equal to 0.25 ± 0.04 μg/L (n=5, P=95%) with the adsorption efficiency being higher than 95% (n=4, P=95%).

scholarly journals A new rapid neutron activation analysis system at Dalat nuclear research reactor

2014 ◽  
Vol 4 (1) ◽  
pp. 84-90
Author(s):  
V. Doanh H. ◽  
D. Vu C. ◽  
Q. Thien T. ◽  
N. Son P. ◽  
T. Sy N. ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Research Reactor ◽  
Vertical Channel ◽  
Nuclear Research ◽  
Selenium Concentration ◽  
Transfer System ◽  
Pneumatic Transfer System ◽  
Analysis System

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 sample from irradiation to measurement position is approximately 3.2 seconds. A loss-free counting system using HPGE detector has been also setup in compacting with the pneumatic transfer system for measurement of sample’s activity, automatically starting for data acquisition at irradiated sample’s arrival. This new facility was tested and shown to have high potential for the determination of short-lived nuclides with half-lives from 10 ¸ 100 seconds. This work presents the results of timing parameter measurements, characterization of irradiation facilities, and application of this system to determining Selenium concentration in several biological reference materials.

scholarly journals Determination of trace elements in some fruits collected in Vietnam and Korea by Neutron Activation Analysis on Dalat and HANARO research reactors

2015 ◽  
Vol 5 (4) ◽  
pp. 23-29
Author(s):  
Thi Sy Nguyen ◽  
Manh Dung Ho ◽  
Van Doanh Ho ◽  
Quang Thien Tran ◽  
Sam Chung Yong
Keyword(s):  
Trace Elements ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Research Reactor ◽  
Standard Samples ◽  
Long Time ◽  
Polyethylene Bags ◽  
Mn Concentrations

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 polyethylene bags for short and long time irradiations, respectively. The NIST-1547 (Peach Leaves) and IAEA-V-10 (Hay Powder) were used for the purpose of quality control. Both analytical and standard samples were irradiated in the 500 kW Dalat research reactor (Vietnam) and the 20 MW HANARO research reactor (Korea). Concentration of 16 elements: Al, As, Au, Br, Ca, Cl, Co, Eu, Fe, K, La, Mg, Mn, Na, Rb and Zn were determined. By comparison the concentrations of trace elements in the investigated Vietnam and Korea’s fruits, revealed that they are mostly similar between two places. However, the Ca concentration in orange from Vietnam was approximately 2.5 times higher than that one from Korea, whereas the Ca concentration in pear from Vietnam was approximately 21 times lower than that one from Korea. The Mn concentrations in all of fruits that collected in Vietnam were mostly higher than those collected in Korea, ranging between 1.4 to 2.2 times.

Quality evaluation of the k 0-standardized neutron activation analysis at the Dalat research reactor

2016 ◽  
Vol 309 (1) ◽  
pp. 135-143 ◽  
Author(s):  
Manh-Dung Ho ◽  
Quang-Thien Tran ◽  
Van-Doanh Ho ◽  
Dong-Vu Cao ◽  
Thi-Sy Nguyen
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Quality Evaluation ◽  
Research Reactor ◽  
Dalat Research Reactor

Upgrade of the Budapest neutron activation analysis laboratory

2016 ◽  
Vol 309 (1) ◽  
pp. 91-99 ◽  
Author(s):  
László Szentmiklósi ◽  
Dénes Párkányi ◽  
Ibolya Sziklai-László
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Analysis Laboratory
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