Determination of radial and axial neutron flux distribution in irradiation channel of NIRR-1 using foil activation technique

Musa, Y.; Ahmed, Y.A.; Yamusa, Y. A.; Ewa, I. O. B.

doi:10.1016/j.anucene.2012.07.014

Cited by 12 publications

(3 citation statements)

References 18 publications

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“…The isothermal temperature is a very important physical parameter that enables us calculate the reactivity defect when the reactor is loaded or beryllium shims are added. Since commissioning of NIRR-1 in 2004, several studies by different scholars have been made to determine its thermal power calibration conversion (Asuku et al, 2020), Thermal Power Calibration Methods (Agbo et al, 2016), peak temperatures under several reactivity accidents test (Salawu and Balogun, 2017), burn-up and core life time expectancy (Yahaya et al, 2017) as well as its radial and axial neutron flux distribution (Musa et al, 2012). Despite these efforts, studies on measurements of NIRR-1 power and isothermal temperatures parameters is still very scanty according to the existing literatures in spite of its usefulness in experimental work as well as its utilizations.…”

Section: Hussaini Et Al Fjsmentioning

confidence: 99%

The Nigerian Research Reactor-1 (Nirr-1) Power and Isothermal Temperature Parameters Measurements

Hussaini,

Ekwu,

Ndawashi

2023

FJS

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This study analyses the accuracy in method of heat balance as well as its efficiency for measuring the power(ρ) and isothermal temperature(θ) of the Nigerian Research Reactor-1 (NIRR-1), a low power miniature neutron source reactor (MNSR). The results showed that the three power levels: full power(30kW), half power(15kW) and low power(3.6kW) were maintained at various isothermal temperature measurements. The average isothermal temperature at full power, half power and low power levels were measured to be (0.2853±0.00058) m 0 K, (0.2945±0.0014) m 0 K and (0.2989±0.00183) m 0 K respectively. The findings have shown a strong dependence of the reactor power at the three levels on the isothermal temperature which were directly proportional. Hence, the behavior of the NIRR-1 operation at the measured parameters will enhance its life span and improve safety.

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Section: Hussaini Et Al Fjsmentioning

confidence: 99%

The Nigerian Research Reactor-1 (Nirr-1) Power and Isothermal Temperature Parameters Measurements

Hussaini,

Ekwu,

Ndawashi

2023

FJS

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“…Besides that, heavy metal https://scientifica.umyu.edu.ng/ Adamu et al, /USci, 2(4): 150 -160, December 2023 (EDXRF) spectroscopy, and instrumental neutron activation analysis (INAA) have been employed to quantify heavy metal concentrations in diverse sources, such as air, water, soil, and food (Chandrasekaran et al, 2015;Han & Gu, 2023;Idris et al, 2015;Mensah et al, 2021). Among these methods, INAA stands out due to its high calibration detection and measurement accuracy, attributed to using a neutron source (Agbo et al, 2016;Musa et al, 2012). Pollution indices, such as the geoaccumulation index (Igeo) and pollution load index (PLI), have proven effective in assessing the extent of contamination (Han and Gu, 2023).…”

Section: Introductionmentioning

confidence: 99%

Quantification of Pollution Index of Selected Heavy Metals in Agricultural Soils in Kafin Hausa Area, Northwest Nigeria

Adamu,

Aliyu,

Musa

et al. 2023

USci

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In this study, the level of heavy metals contamination in agricultural soils in Kafin Hausa, Nigeria, was investigated and characterised using the Instrumental Neutron Activation Analysis technique via the Nigeria Research Reactor-1. Fifteen soil samples were collected from five different sampling sites and analysed for eight heavy metals: aluminium (Al), arsenic (As), barium (Ba), iron (Fe), holmium (Ho), potassium (K), magnesium (Mg), and rubidium (Rb). Heavy metal pollution indices were estimated using the geo-accumulation index (Igeo), enrichment factor (EF), contamination factor (CF), and pollution load index (PLI). The results showed that the mean Igeo indexes of Al (-3.09), As (-4.88), Ba (-0.89), Fe (-3.53), K (-2.20), and Mg (-4.95) were lower than zero, indicating that the soil of the studied region was uncontaminated by these metals. The mean EF of Ho was significantly higher than other metals, indicating that the soil is enriched with this metal. As (0.40) and Mg (0.36) had the lowest EF values. Similarly, the mean CF of all metals was lower than 1, suggesting minimal or low contamination. In contrast, Ho (1.60) exhibits the highest CF value, signifying moderate contamination. The PLI values for all metals were between 0.16 and 0.51, indicating that the studied area is unpolluted. There are strong correlations between all the elements, with p-values at 0.01 level, particularly for K – Rb, Ba – K, and Ba – Rb, with values ranging from 0.94 to 0.94. Hence, the results of this study suggest that the agricultural soils in Kafin Hausa are uncontaminated by heavy metals.

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“…Neutron spectroscopy is very important in development of neutron applications in different field of science and technology [1]. The activation foils method is commonly used to measure neutron spectra from thermal up to 10 MeV and above [2][3][4][5]. Neutron spectrometry with foil activation consists of measuring the induced activity of thin foils when exposed by the neutron irradiation and then using an unfolding code to calculate the neutron energy spectrum which induced the measured foils activities [6].…”

Section: Introductionmentioning

confidence: 99%

Coupling the SAND-II and MCNPX codes for neutron spectrum unfolding

Heydarzade¹,

Kasesaz²,

Mohammadi³

2018

J. Inst.

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Measurement of neutron energy spectrum is very important to develop the application of neutrons in different fields of science and technology. One of the commonly used methods to measure the neutron energy spectrum is the threshold foil activation method and using an unfolding code such as SAND-II. The main limitation of such codes is that the geometry of the source and measurement setup could not be defined in the code. The main objective of this study is the coupling SAND-II and MCNPX codes to consider the geometry effect on the unfolded neutron energy spectrum. The full geometry of the measurement setup including the source and foils can be simulated by MCNPX code. The results show that considering the irradiation geometry produces a better a-priori information of the neutron field.

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Determination of radial and axial neutron flux distribution in irradiation channel of NIRR-1 using foil activation technique

Cited by 12 publications

References 18 publications

The Nigerian Research Reactor-1 (Nirr-1) Power and Isothermal Temperature Parameters Measurements

The Nigerian Research Reactor-1 (Nirr-1) Power and Isothermal Temperature Parameters Measurements

Quantification of Pollution Index of Selected Heavy Metals in Agricultural Soils in Kafin Hausa Area, Northwest Nigeria

Coupling the SAND-II and MCNPX codes for neutron spectrum unfolding

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