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Papers by amina Deghal Cheridi

Research paper thumbnail of Source term analysis and impact study during a hypothetical accident in Haiyang nuclear power plant

Radiation Physics and Chemistry, Dec 31, 2023

Research paper thumbnail of Flow blockage accident analysis in a multi purposes research reactor using Relap5 system code

Progress in Nuclear Energy, Feb 29, 2024

Research paper thumbnail of Influence of Geometric Parameters on the Performance of a Vortex Type Cooling Tower

Lecture notes in networks and systems, 2023

Research paper thumbnail of Vortex Tower Prototype Realization

2022 2nd International Conference on Advanced Electrical Engineering (ICAEE), Oct 29, 2022

Research paper thumbnail of Numerical Study of Free Liquid Jet Primary Breakup Phenomenon in Still Gases

Algerian Journal of Renewable Energy and Sustainable Development

The present paper consists of a numerical investigation carried out for primary break up analysis... more The present paper consists of a numerical investigation carried out for primary break up analysis of a vertical water jet. Many parameters impact the flow development such as velocity, turbulence and nozzle shape. In this work, two types of nozzle geometries have been performed, the first is a capillary circular and the second is conical. The calculations have been performed using the CFD Code Fluent of ANSYS, considering laminar and turbulent flow regimes. While turbulence was modelled using RNG k-ε of RANS approach. The main results show that the jet evolves differently in the two considered nozzle geometries comparing the jet intact lengths, drop sizes and distance between successive drops. It is observed that the turbulence increases substantially the jet intact length and enables the jet breakup at the lower part of the water column. For the conical nozzle case, the jet instabilities grow quickly resulting a drop size in the same order of the jet diameter and an intact length l...

Research paper thumbnail of Comparative Radiation Dose Study of a Hypothetical Accident in a Research Reactor

Kemija u industriji

This study is a contribution for radiation dose calculations of a hypothetical accident of a 1 MW... more This study is a contribution for radiation dose calculations of a hypothetical accident of a 1 MW research reactor Triga Mark II using HotSpot code. A postulated accidental release of noble gases and halogens were considered. The total effective dose (TED) was estimated for 1 day and 50 years after release. The total damage of fuel element cladding with a maximum radioactivity was considered. The obtained results show minimal TED values at the beginning of the release and at a shorter distance from the source. The maximum calculation results are acceptable and below the recommended public dose limit.

Research paper thumbnail of Numerical investigation of a novel cooling vortex tower using Relap5 computer code

Nuclear Engineering and Design, 2022

Research paper thumbnail of Realization and experimentation of a novel vortex cooling tower

Energy Conversion and Management

Research paper thumbnail of Transient Simulation of an Industrial Steam Boiler

Algerian Journal of Signals and Systems

The safety analysis of an industrial installation is extensively based on modeling and simulation... more The safety analysis of an industrial installation is extensively based on modeling and simulation. However, the analysis of simulation using realistic computer codes like RELAP5/Mod3.2 will help understand thermal-hydraulic behavior of an installation during normal and accidental conditions. In a steam boiler operation, it is very important to evaluate numerous accident scenarios under real plant conditions. One of the main accidental transients is tube rupture of steam boiler. The main objective of this study consists toinvestigate the behavior of an industrial steam boiler installed in the complex of natural gas liquefaction (LNG) at Skikda in Algeria during feed water line break accident. A RELAP5 model was set up to simulate the entire system, the model represents all steam boiler components to be suitable for the analysis of the several accidents. The control and regulation systems are also considered. The model was qualified against the steam boiler data at steady-state condit...

Research paper thumbnail of Numerical Simulation of the Accidental Transient of an Industrial Steam Boiler

Heat and Mass Transfer - Advances in Science and Technology Applications, 2019

Research paper thumbnail of Numerical simulation of a 374 tons/h water-tube steam boiler following a feedwater line break

Annals of Nuclear Energy, 2016

To ensure the operational safety of an industrial water-tube steam boiler it is very important to... more To ensure the operational safety of an industrial water-tube steam boiler it is very important to assess various accident scenarios in real plant working conditions. One of the most challenging scenarios is the loss of feedwater to the steam boiler. In this paper, a simulation of the behavior of an industrial water-tube radiant steam boiler during feedwater line break accident is discussed. The simulation is carried out using the RELAP5 system code. The steam boiler is installed in an Algerian natural gas liquefaction complex. The simulation shows the capabilities of RELAP5 system code in predicting the behavior of the steam boiler at both steady state and transient working conditions. From another side, the behavior of the steam boiler following the accident shows how the control system can successfully mitigate the effects and consequences of such accident and how the evaporator tubes can undergo a severe damage due to an uncontrolled increase of the wall temperature in case of failure of this system.

Research paper thumbnail of Modeling and simulation of a natural circulation water-tube steam boiler

SN Applied Sciences, 2019

In the present work, the overall behavior of a steam boiler is investigated using RELAP5/MOD3.2 s... more In the present work, the overall behavior of a steam boiler is investigated using RELAP5/MOD3.2 system code at three different operating loads. Main thermal-hydraulic parameters are analyzed at steady-states corresponding to 60%, 100% and 110% of the boiler nominal load. RELAP5 system code is widely used in the design and safety analysis of nuclear reactor installations as well as for conventional facilities in recent years. The steam boiler studied herein is a water-tube natural circulation type used in a natural gas liquefaction complex for superheated steam production purposes. A complete model of the steam boiler has been developed for the RELAP5 code. This model, that is also suitable for transient simulation, has been used for the reconstruction of three steady-state tests in order to assess the steam boiler safety features during the operation. The model includes all parts that can eventually influence the safety of the steam boiler particularly the control and regulation system. A qualification process has been undertaken in the aim to verify the capability of the model to reproduce the main parameters of the steam boiler. This process revealed that RELAP5 system code results matches significantly the experimental data of the steam boiler. Finally, it should be mentioned that the results obtained so far are very encouraging for studying the general behavior of the steam boiler in transient operating conditions, as well as for evaluating its safety under hypothetical scenarios. This step will be undertaken in the near future and will allow the check of the code capability to simulate thermal-hydraulic phenomena occurring in the steam boiler during transient operation.

Research paper thumbnail of Source term analysis and impact study during a hypothetical accident in Haiyang nuclear power plant

Radiation Physics and Chemistry, Dec 31, 2023

Research paper thumbnail of Flow blockage accident analysis in a multi purposes research reactor using Relap5 system code

Progress in Nuclear Energy, Feb 29, 2024

Research paper thumbnail of Influence of Geometric Parameters on the Performance of a Vortex Type Cooling Tower

Lecture notes in networks and systems, 2023

Research paper thumbnail of Vortex Tower Prototype Realization

2022 2nd International Conference on Advanced Electrical Engineering (ICAEE), Oct 29, 2022

Research paper thumbnail of Numerical Study of Free Liquid Jet Primary Breakup Phenomenon in Still Gases

Algerian Journal of Renewable Energy and Sustainable Development

The present paper consists of a numerical investigation carried out for primary break up analysis... more The present paper consists of a numerical investigation carried out for primary break up analysis of a vertical water jet. Many parameters impact the flow development such as velocity, turbulence and nozzle shape. In this work, two types of nozzle geometries have been performed, the first is a capillary circular and the second is conical. The calculations have been performed using the CFD Code Fluent of ANSYS, considering laminar and turbulent flow regimes. While turbulence was modelled using RNG k-ε of RANS approach. The main results show that the jet evolves differently in the two considered nozzle geometries comparing the jet intact lengths, drop sizes and distance between successive drops. It is observed that the turbulence increases substantially the jet intact length and enables the jet breakup at the lower part of the water column. For the conical nozzle case, the jet instabilities grow quickly resulting a drop size in the same order of the jet diameter and an intact length l...

Research paper thumbnail of Comparative Radiation Dose Study of a Hypothetical Accident in a Research Reactor

Kemija u industriji

This study is a contribution for radiation dose calculations of a hypothetical accident of a 1 MW... more This study is a contribution for radiation dose calculations of a hypothetical accident of a 1 MW research reactor Triga Mark II using HotSpot code. A postulated accidental release of noble gases and halogens were considered. The total effective dose (TED) was estimated for 1 day and 50 years after release. The total damage of fuel element cladding with a maximum radioactivity was considered. The obtained results show minimal TED values at the beginning of the release and at a shorter distance from the source. The maximum calculation results are acceptable and below the recommended public dose limit.

Research paper thumbnail of Numerical investigation of a novel cooling vortex tower using Relap5 computer code

Nuclear Engineering and Design, 2022

Research paper thumbnail of Realization and experimentation of a novel vortex cooling tower

Energy Conversion and Management

Research paper thumbnail of Transient Simulation of an Industrial Steam Boiler

Algerian Journal of Signals and Systems

The safety analysis of an industrial installation is extensively based on modeling and simulation... more The safety analysis of an industrial installation is extensively based on modeling and simulation. However, the analysis of simulation using realistic computer codes like RELAP5/Mod3.2 will help understand thermal-hydraulic behavior of an installation during normal and accidental conditions. In a steam boiler operation, it is very important to evaluate numerous accident scenarios under real plant conditions. One of the main accidental transients is tube rupture of steam boiler. The main objective of this study consists toinvestigate the behavior of an industrial steam boiler installed in the complex of natural gas liquefaction (LNG) at Skikda in Algeria during feed water line break accident. A RELAP5 model was set up to simulate the entire system, the model represents all steam boiler components to be suitable for the analysis of the several accidents. The control and regulation systems are also considered. The model was qualified against the steam boiler data at steady-state condit...

Research paper thumbnail of Numerical Simulation of the Accidental Transient of an Industrial Steam Boiler

Heat and Mass Transfer - Advances in Science and Technology Applications, 2019

Research paper thumbnail of Numerical simulation of a 374 tons/h water-tube steam boiler following a feedwater line break

Annals of Nuclear Energy, 2016

To ensure the operational safety of an industrial water-tube steam boiler it is very important to... more To ensure the operational safety of an industrial water-tube steam boiler it is very important to assess various accident scenarios in real plant working conditions. One of the most challenging scenarios is the loss of feedwater to the steam boiler. In this paper, a simulation of the behavior of an industrial water-tube radiant steam boiler during feedwater line break accident is discussed. The simulation is carried out using the RELAP5 system code. The steam boiler is installed in an Algerian natural gas liquefaction complex. The simulation shows the capabilities of RELAP5 system code in predicting the behavior of the steam boiler at both steady state and transient working conditions. From another side, the behavior of the steam boiler following the accident shows how the control system can successfully mitigate the effects and consequences of such accident and how the evaporator tubes can undergo a severe damage due to an uncontrolled increase of the wall temperature in case of failure of this system.

Research paper thumbnail of Modeling and simulation of a natural circulation water-tube steam boiler

SN Applied Sciences, 2019

In the present work, the overall behavior of a steam boiler is investigated using RELAP5/MOD3.2 s... more In the present work, the overall behavior of a steam boiler is investigated using RELAP5/MOD3.2 system code at three different operating loads. Main thermal-hydraulic parameters are analyzed at steady-states corresponding to 60%, 100% and 110% of the boiler nominal load. RELAP5 system code is widely used in the design and safety analysis of nuclear reactor installations as well as for conventional facilities in recent years. The steam boiler studied herein is a water-tube natural circulation type used in a natural gas liquefaction complex for superheated steam production purposes. A complete model of the steam boiler has been developed for the RELAP5 code. This model, that is also suitable for transient simulation, has been used for the reconstruction of three steady-state tests in order to assess the steam boiler safety features during the operation. The model includes all parts that can eventually influence the safety of the steam boiler particularly the control and regulation system. A qualification process has been undertaken in the aim to verify the capability of the model to reproduce the main parameters of the steam boiler. This process revealed that RELAP5 system code results matches significantly the experimental data of the steam boiler. Finally, it should be mentioned that the results obtained so far are very encouraging for studying the general behavior of the steam boiler in transient operating conditions, as well as for evaluating its safety under hypothetical scenarios. This step will be undertaken in the near future and will allow the check of the code capability to simulate thermal-hydraulic phenomena occurring in the steam boiler during transient operation.