Abstract Small modular reactors (SMRs) have been considered as a serious alternative for large nuclear power plants (NPPs) to produce safer and cleaner energy in the context of global balance climate change related CO2 emissions more than decade. However, high exploitation uranium deposits around world will make this substance rarer even expensive. Here, thorium is good be integrated into fuel cycle stock new fissile material, namely U233. The present work considering SMR model CAREM-25...

Abstract In this work, the analytical solutions of Dirac equation with spin and pseudospin symmetry for Generalized Inverse Quadratic Yukawa (GIQY) potential have been investigated. The problem was approximately addressed using path integral formalism. We present energy eigenvalues expression along upper lower radial wave functions any given k-state. Schrödinger GIQY Dirac’s Kratzer potential, inversely quadratic Coulomb also calculated compared to results from previous investigations.

The development of bulk magnets based on (RE)BCO-type superconductors that can generate up to 17 T requires the implementation a magnetization system, sometimes pulsed. Therefore, at least one coil around high temperature superconducting (HTS) is required. In this paper, we suggest an analytical approach in order assess magnetic vector potential and compute inductance having rectangular cross section concentric with circuit including air-gap. On proposed geometry, results are compared those...

The occurrence of the criticality with analogue modelled configurations fossil reactor zone n°9 (RZ9) from Oklo uranium deposit in Gabon is studied.The RZ9 and other reaction zones 7 8, same sector are characterized by a low thickness compared to 1 6 an important presence organic matter lower U content.This makes simulations performed past unable explain that phenomenon such zones.In present work extrapolation 2 billion years ago as initial state done using MCNP Monte-Carlo based code.To...

Explanation of the so-called Oklo phenomenon can only be found by associating neutron physics and geological observations. The framework Reactor Zone #9 (RZ9) from uranium deposit in Gabon is discussed. A realistic model RZ9 proposed studied with present-day numerical tools. Anchor points for this are set means a selection relevant parameters acting on conditions neutron-transport physics, including ore homogeneity, initial reactor thickness, reflector effect poison content. Based Monte...

Abstract Among all geophysical methods, gamma ray spectrometry is not widely used in impact cratering studies, despite its efficiency the investigation of physical/chemical changes rocks. The application method to data from Maâdna crater aimed at detection and verification presumed impact‐derived melt rocks or breccias, as well discussing implications on process formation. resulting information also demonstrates potential these specific regarding our general understanding cratering, while a...

Since the discovery of first reactor zone (RZ) at Oklo uranium deposit in 1972, many isotopic studies have been performed to understand mechanism operation as fission reactors and trace migration behaviors fissiogenic isotopes produced RZs. As representative parameters characterize operating conditions RZs, neutron fluence generated RZ, duration RZ operation, restitution factor 235U from α decay 239Pu by capture 238U proportion events due 235U, are compiled compared with individual In...

Small Modular Reactors (SMRs) are compact nuclear reactors designed to generate electric power up 300 MWe. They could be assembled in factory, and then transported directly installed on-stie. CAREM (Central Argentina de Elementos Modulares) is a national SMR development project, based on light water reactor technology supervised by Argentina's National Atomic Energy Commission (CNEA). It natural circulation-based with an indirect-cycle, including specific items parts that simplify the design...

Electron-Impact Ionization (EII) is considered one of the most important ionization methods in dynamic systems, which elements and ions are suddenly exposed to energetic electrons. In many plasma types, it has been observed that some electrons (hot) governed by a non-Maxwellian energy distribution. This study illustrates effects distribution on beryllium Be+2 emission lines their effective rate coefficients. The focus as an impacted material electron flux aimed evaluate EII rates for Be...

Small modular reactors (SMRs) have been considered as a serious alternative for large nuclear power plants (NPPs) to produce safer and cleaner energy in the context of global balance climate change related CO2 emissions more than decade. However, high exploitation uranium deposits around world will make this substance rarer even expensive. Here, thorium is good be integrated into fuel cycle stock new fissile material, namely U233. The present work considering SMR model CAREM-25 (Argentina),...

Abstract A totally reflected core model was built to estimate the infinite multiplication factor ${{k}}_{{\infty}}$ as a parametric function using MCNP code. Thus, it possible evaluate influence of specific physical parameter on criticality occurrence Oklo phenomenon, namely initial Poisons (IP: Gd, Sm and Nd). In fact, these rare earth elements, prior in reaction zones (RZs), are considered key present study. construct isocritical lines,...

The discovery in Nature of 16 reactions zones where sustained fission chain reaction occurred 1.95 b.y ago raised numerous questions many scientific fields. Fifty years later, some them are still unanswered. This article recalls the history this and facts before discussing present-day understanding complex phenomenon.

All magnetization methods of superconductors are based on the variation applied magnetic field that results from characteristics inductor used. In this paper we have developed an analytical model to show effect presence a superconducting pellet value inductance circular coil rectangular cross section placed in ferromagnetic circuit with gap. This is determination vector potential solving Laplace and fish equations different regions interest using method separating variables. resolution done...

<p>Geophysics continues to play a critical role in the future discovery of terrestrial impact structures. While signatures within these structures may not be unique, application geophysics can effectively characterize them, even when they are deeply eroded or completely buried underground. In case Maâdna crater (33°19' N, 4°19' E), among new performed geophysical surveys, GPR technique has been especially used explore supposed ejecta...