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Displacement damage cross section and mechanical properties calculation of an Es-Salam research reactor aluminum vessel

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Nuclear Science and Techniques 2017年第11期28卷 217-225页

作者： Djillali Saad Hocine Benkharfia Mahmoud Izerrouken Ahmed Ali Benyahia hamid ait.abderrahim Department of nuclear materials and mechanical test Nuclear Research Center of Birine BP 180 17200 Ain-OusseraAlgeria Reactor Physics Department Nuclear Research Center of Birine BP 180 17200 Ain-Oussera Algeria Reactor Physics Department Nuclear Research Center of Draria BP 43 Sebala 16050 Draria Algeria Advanced Mechanics Laboratory University of Sciences and Technology Houari Boumediene BP 32 El Alia16111 Bab Ezzouar Algeria SCK-CEN Belgian Nuclear Research Centre Boeretang 2002400 Mol Belgium

Nuclear facility aging is one of the biggest problems encountered in nuclear engineering. Radiation damage is among one of the aging causes. This kind of damage is an important factor of mechanical properties deterioration. The interest of this study is on the Es-Salam research reactor aluminum vessel aging due to neutron radiation. Monte Carlo(MC) simulations were performed by MCNP6 and SRIM codes to estimate the defects created by neutrons in the vessel. MC simulations by MCNP6 have been performed to determine the distribution of neutron fluence and primary knock-on atom(PKA) creation. Considering our boundary conditions of the calculations, the helium and hydrogen gas production in the model at a normalized total neutron flux of 6.62×10^(12) n/cm^2 s were determined to be 2.86 × 10~8 and 1.33 × 10~9 atoms/cm^3 s,respectively. The SRIM code was used for the simulation of defects creation(vacancies, voids) in the aluminum alloy of the Es-Salam vessel(EsAl) by helium and hydrogen with an approximate energy of 11 MeV *** coupling between the two codes is based upon postprocessing of the particle track(PTRAC) output file generated by the MCNP6. A small program based on the Mat Lab language is performed to condition the output file MCNP6 in the format of a SRIM input file. The concentration of silicon was determined for the vessel by the calculation of the total rate of ^(27)Al(n,γ)^(28)Si reaction. The DPA(displacement per atom) was calculated in SRIM according to R.E. Stoller recommendations; the calculated value is 0.02 at a fast neutron fluence 1.89 × 10^(19) n/cm^***-MRx standard for 6061-T6 aluminum was used for the simulation of the evolution of mechanical properties for high fluence. The calculated values of nuclear parameters and DPA obtained were in agreement with the experimental results from the Oak Ridge High Flux Isotope Reactor(HFIR) reported by Farrell and coworkers.

关键词： Radiation damage EsAl 6061-T6 Silicon production DPA PKA MCNP6 SRIM RCC-MRx HFIR

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An accurate model for the thin film flow

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Acta Mechanica Sinica 2008年第4期24卷 375-380页

作者： hamid ait Abderahmane Georgios H.Vatistas Department of Mechanical and Industrial Engineering Concordia University 1455 de Maisonneuve Blvd West Montreal OC H3G 1M8 Canada

This paper deals with the linear stability of a liquid film flowing down an inclined plane. The Navier-Stokes equations were reduced into four evolution equations that describe the development of the film depth, the flow rate, the free surface velocity, and the wall shear stress, using the Karman-Polhausen boundary layer integral method. Thus, we were able to determine the stability threshold and approach well the critical wave number for long waves. The obtained results were found to be in good agreement with the experiments of Liu et al.

关键词： Liquid film Linear stability Flow model

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Is There a Relationship between COVID-19 Infection and the Occurrence of Anencephaly? Observation of the Maternity of Mohammed the VI University Hospital of Marrakech

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Open Journal of Obstetrics and Gynecology 2023年第1期13卷 53-63页

作者： Bouchra Fakhir Mohammed Hicham Abdelkhalki Yassir ait Benkaddour Karam Harrou Ahlam Bassir abderrahim Aboulfalah hamid Asmouki Abderraouf Soummani Department of Obstetrics & Gynecology Faculty of Medicine and Pharmacy Cadi Ayyad University Marrakech Morocco

Introduction: Morocco has experienced, like the whole world, the COVID-19 pandemic. Until the writing of this article, a subjective observation of the increase in the number of anencephaly has been observed in our facility. And since the teratogenic potential of the SARS Cov 2 virus is not sufficiently documented, we wondered if there would be a relationship between the relatively high number of anencephalic fetuses and COVID-19 infection. Aim: the objective of the study is to look for a possible correlation between the period of conception of these anencephalies and the pandemic. Material and methods: This is a retrospective study (from June 1, 2020 to May 31, 2022 in the Obstetrics Gynecology department, Faculty of Medicine and Pharmacy, CADI AYYAD UNIVERSITY Marrakech Morocco) consisting of the analysis of the number of patients in the target embryonic period (namely the closure of the neural tube: D18 to D30 of embryonic life) compared to the reference curves of the evolution of the SARS Cov2 pandemic. Results: The analysis of the number of patients at the target embryonic phase shows that many of our anencephalons (63%) were conceived during periods of high diffusion of the SARS Cov 2 virus in Morocco. Conclusion: Our study suggests a relationship between the COVID-19 pandemic and the occurrence of anencephaly, we cannot, however, highlight the type of direct or indirect relationship that binds them. Therefore, further studies should be considered to better investigate this relationship.

关键词： Anencephaly Closure Neural Tube Anomaly COVID-19 SARS Cov2 Malformation Pandemic

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Synthesis and Characterization of a Neodymium Zirconate Pyrochlore Doped with Ytterbium：（YbxNdl-x）2Zr2O7 （x = 0.1, 0.25 and 0.4）

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材料科学与工程（中英文B版） 2013年第1期3卷 1-12页

作者： Nour-el-hayet Kamel Dalila Moudir Ziane Kamel hamid ait-Amar Division of Nuclear Techniques Nuclear Research Centre of Algiers 2. Bd Frantz Fanon Alger-RP Algiers Algeria Faculty of Mechanical and Process Engineering University of Science and Technology Houari Boumediene El-Alia Algiers Algeria

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Optimization of the Synthesis Conditions of a Cesium Confinement Matrice, a Pollucite Analogue, Simulated with Potassium

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材料科学与工程（中英文A版） 2013年第10期3卷 704-709页

作者： Nour-el-hayet Kamel Dalila Moudir Hadda Belabes hamid ait Amar Ziane Kamel Fairouz Aouchiche Soumia Kamariz Yasmina Mouheb Algiers Nuclear Research Centre Department of Spectrometry B.P 399 Alger-RP Algiers Algeria Houari Boumediene University of Sciences and Technology P.O.Box: 111 El-Alia Bab Ezzouar Algiers Algeria

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Effect of the Ce Content on a Nuclear Waste Glassy Matrix in the System SiO2-Al2O3-CaO-MgO-ZrO2-TiO2, Synthesized at a Low Melting Temperature

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材料科学与工程（中英文A版） 2013年第4期3卷 209-223页

作者： Nour-el-Hayet Kamel Dalila Moudir Ziane Kamel Abdelmoumene Djerridi Samy Mouhamou AbdelbakiBenmounah Rafika Souag Mustapha Taouinet hamid ait-Amar Department of Spectrometry Algiers Nuclear Research Centre Algiers Algeria Faculty of Sciences M'hamed Bougara University Boumerdes 35000 Algeria Metallurgy Department Draria Nuclear Research Centre Sebala Draria Algeria Faculty of Mechanical and Process Engineering El-Alia Houari Boumediene University of Science and Technology Bab-EzzouarAlgiers Algeria

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