An investigation of reactivity effect due to inadvertent filling of the irradiation channels with water in NIRR-1 Nigeria Research Reactor-1

Iliyasu, U.; Ibrahim, Y.V.; Umar, S.A.; Agbo, S.A.; Jibrin, Y.

doi:10.1016/j.apradiso.2017.02.008

Cited by 1 publication

(1 citation statement)

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“…RSG-GAS is a research reactor used for radioisotope production, nuclear energy training, material irradiation and the nuclear industry [1]. The RSG-GAS core consists of the standard fuel assembly, control rods, moderator, reflector, reactivity, shutdown control systems and experimental equipment.…”

Section: Introduction mentioning

confidence: 99%

Analyses of Neutron Absorber Materials on the Safety Parameters in the RSG-Gas Reactor

Suparlina

Surbakti²,

Pinem³

et al. 2021

Tri Dasa Mega

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Shutdown system in RSG-GAS reactor is using neutron absorber. There are 3 kinds of absorber material in research reactors including Ag-In-Cd alloy, B4C, and Hf. In this works, analyses of different neutron absorbers on the main safety core parameters in the RSG-GAS research reactor are selected for analyses. Their integral effects on the main neutronic core parameters important to safety issues are investigated. These parameters are core excess reactivity, shutdown margin, total reactivity worth of control rods, PPF and neutron flux . The RSG-GAS core silicide fuel is selected as the case study to verify calculations. A three-dimensional, four-group diffusion model is selected for core calculations. The well-known WIMSD-5B and Batan-3DIFF reactor codes are used to carry out these calculations. It is found that the largest shutdown margin is gained using the B4C; also the lowest PPF is gained using the Hf material. The maximum point power densities belong to the inside fuel regions surrounding the CIP (centre irradiation position), surrounded by control fuel elements, and the peripheral fuel elements beside the berrylium reflector. The greatest and least fluctuation of the point power densities are gained by using B4C and Ag-In-Cd alloy, respectively.

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Section: Introduction mentioning

confidence: 99%