A New Automated Sample Transfer System for Instrumental Neutron Activation Analysis

Ismail, S. S.

doi:10.1155/2010/389374

Cited by 12 publications

(5 citation statements)

References 4 publications

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“…International Journal of Biology and Chemistry 17, № 1 (2024) Gold content determination in small core-samples by instrumental neutron activation analysis Sizes of the small core-sample were selected to fit the dimensions of the standard HDPE capsules (inserted in the transport ones) to implement relative method of standardization. The masses of coresamples were evaluated preliminarilyy; none of them should exceed ≈10 g to provide safe operation of the automated pneumatic transport system (PTS) [21,22], i.e. to avoid capsule jamming during irradiation.…”

Section: Methodsmentioning

confidence: 99%

Gold content determination in small core-samples by instrumental neutron activation analysis

Silachyov,

V.A. Glagolev,

M.N. Kokkuzova

2024

IJBCh

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Application of instrumental neutron activation analysis (INAA) based on the relative method of concentration standardization was considered to determine Au content in small solid core-samples of the gold-bearing ores and rocks up to 10 g of the mass. The small core-samples about 10 mm in diameter and 22-23 mm in length were cut from the previously collected ore lumps or in-situ using a handheld drilling rig. The studied small core-samples and the polyethylene capsules of the same dimensions filled up with the corresponding certified reference material (CRM) were irradiated for 2 min by a lower density neutron flux with the help of the automated pneumatic transport system (PTS). Maximum mass and dimensions of the core-samples corresponded to the PTS design and to the conditions of its safe operation. A special device was made to fix the transport capsules in the stable counting geometry making possible to eliminate the influence of the neutron flux gradient during irradiation. Due to the substantial differences in CRM and solid sample densities, corrections for neutron self-shielding and for gamma-ray self-absorption by the core-samples were applied. The method was tried to analyze Au content in 170 small core-samples presenting different gold-bearing ores and country rocks from the Kazakhstan’s gold-barite-polymetallic deposit Maikain. This approach, rather simple methodically and requiring no unique equipment, can be used to assess gold resources together with the methods of geostatistics.

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Section: Methodsmentioning

confidence: 99%

Gold content determination in small core-samples by instrumental neutron activation analysis

Silachyov,

V.A. Glagolev,

M.N. Kokkuzova

2024

IJBCh

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“…[11]. Atomic Institute, Vienna University of Technology-TRIGA Mark II, has recently developed a fully automated fast pneumatic transport system for short-time activation analysis [12]. The control unit is equipped with a Programmable Logic Controller, software package, and other devices to facilitate optimal analytical procedures.…”

Section: Introductionmentioning

confidence: 99%

Design and Construction of Pneumatic Transfer System Controller Unit for Ghana MNSR

Amponsah-Abu

Nyarko

Edziah

2019

Journal of Control Science and Engineering

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Pneumatic Transfer System (PTS) is an auxiliary system of Ghana Research Reactor-1 (GHARR-1) used to transfer sample capsule in and out of the reactor irradiation sites. The PTS’ controller unit design and construction were carried out because the original transfer system was not designed to operate in cyclic NAA. To address these situations, a Programmable Logic Controller (PLC) has been used to design and construct a control unit to facilitate a cyclic neutron activation analysis (CNAA) application for GHARR-1. The design has been simulated successfully using a LOGO Soft Comfort software, version 8. The constructed control unit has been tested experimentally using 220 AC volts electric bulbs to represent solenoid valves. The results show that the sample-IN and sample-OUT bulbs come ON and go OFF to represent the solenoid valves opening and closing for sample transfer. The study has shown that the computer based PLC controller unit for PTS is capable of facilitating both cyclic and conventional NAA application for the GHARR-1.

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“…Most facilities use aluminum tubing, at least for the part in the reactor core, which represents a potential source for the contamination of the capsules with aluminum. Therefore, in many new set-ups polyamide tubes are used for the ex-core connections [6]. Polyamide tubes are also more economical and easier to set-up, because the bending of aluminum tubes can be both difficult and costly.…”

Section: Introductionmentioning

confidence: 99%

Automation of a TRIGA-type pneumatic transfer system

Rupnik

Smodiš

2016

J Radioanal Nucl Chem

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The pneumatic transfer system (PTS) of the Jožef Stefan Institute's TRIGA Mark II research reactor was modernized. The main goals of the PTS's renewal were to improve the overall quality of the irradiations, to increase the level of safety and to improve the timing precision. To lower the costs and to facilitate the licensing process, this upgrade was made with the minimum possible intervention with respect to the existing tubing connections. The upgrade involves only two new mechanical components: a terminal station and an automated capsule loader. A similar solution can be applied to any TRIGAtype PTS.

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A New Automated Sample Transfer System for Instrumental Neutron Activation Analysis

Cited by 12 publications

References 4 publications

Gold content determination in small core-samples by instrumental neutron activation analysis

Gold content determination in small core-samples by instrumental neutron activation analysis

Design and Construction of Pneumatic Transfer System Controller Unit for Ghana MNSR

Automation of a TRIGA-type pneumatic transfer system

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