scholarly journals Study on Radionuclides from Soil to Onion at Johor and Perak, Malaysia

2021 ◽  
pp. 30-36
Author(s):  
N. M. Yussuf ◽  
M. A. Saeed ◽  
H. Wagiran ◽  
I. Hossain
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Research Reactor ◽  
Activity Concentration ◽  
Natural Background ◽  
Transfer Factors ◽  
Natural Field ◽  
Triga Mark Ii ◽  
Radioactivity Measurements ◽  
Scientific Fields

In this report, the radiological survey of radioactivity measurements in soil and onion and their mobility is carried out which is very important in the environment and several scientific fields. The measurements about the concentrations of activity in soil, leaves and bulbs for onion in the location of Johor and Perak, Malaysia have been carried out using neutron activation analysis (NAA) of TRIGA MARK II research reactor facilities at Nuclear Agency, Bangi, Malaysia. The transfer factors (TFs) of 238U, 232Th and 40K from 6 different natural background soils are studied from soil to onion under natural field conditions. The TFs for onion leaves and bulb are in the range of (6.01-79.2) x 10-3, (1.21-61.4) x 10-3, (1.012-4.265) x 10-1 and 0.028-0.334, 0.017-0.293 and (0.908 -3.685) x10-1for 238U, 232Th, and 40K respectively. There exists a linearity correlation between the dose rate as well as activity concentration of the soils. The observed transfer factor of onion bulbs was usually higher than in leaves.

Conceptual implementation stages for Moroccan PGAA/NI instruments: STAGE I & II

2020 ◽  
Vol 22 (4) ◽  
pp. 403-415
Author(s):  
H. Amsil ◽  
A. Jalil ◽  
K. Embarch ◽  
H. Bounouira ◽  
A. Didi ◽  
...  
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Research Reactor ◽  
Neutron Imaging ◽  
Prompt Gamma ◽  
Second Stage ◽  
Beam Tube ◽  
Implementation Stages ◽  
Triga Mark Ii ◽  
Gamma Neutron Activation

The first installation around the tangential beam tube of the Moroccan TRIGA Mark II research reactor comprises combined instruments for Prompt Gamma Neutron Activation Analysis (PGAA) and Neutron Imaging (NI). The implementation of this project is divided over three main stages, namely the installation of the collimator and the primary beam shutter, which is a common section for introduction inside the reactor; the PGAA instruments’ installation; and finally, the installation of the PGNAA/NI combined instruments. The entire design was planned for this project, and detailed information about the first and the second stage is described in this work.

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.

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.

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