Two methods were elaborated for calculation of the kinetic effects caused by the photo-neutrons emitted in beryllium reflector of the VVRSZM type research reactor of KFKI-AEKI. The first simplified point kinetic model assumes that the importance of photo-neutrons is the same as that for the neutrons originated from the fission events. The point kinetic parameters were calculated by using the mo...

High level Liquid Waste (HLW) is generated during the reprocessing of spent nuclear fuel which is used to recover uranium and plutonium. More than 99% of the radioactivity generated during the burning of nuclear fuel in the reactor is present in HLW. For the efficient management of HLW either by vitrification in the suitable borosilicate glass matrix, or partitioning and transmutation (P&T) of ...

In the conversion of fuel in the Tehran Research Reactor core from Highly- Enriched Uraniutn to Low-Enriched Uranium fuel neutronics analysis, thermal hydraulic calculations and kinetic performance of the core have to be studied. In this study, static and dynamic core performance for HEU and LEU fuels were investigated. In static conditions, two groups of neutron flux distributions in axia...

An accurate description of the fluid flow and heat transfer within a Pressurized Water Reactor (PWR), for the safety analysis and reactor performance is always desirable. In this paper a mathematical model of the fundamental physical phenomena which are associated to a typical PWR is presented. The mathematical model governs the fluid dynamics in the reactor. Using commercial software CFX, a co...

The current resurgence of interest in the nuclear power industry has led to renewed interest in new reactor designs. The GE Compact Modular Boiling Water Reactor (CM-BWR) is one such reactor. The 350 MWe CM-BWR is designed for small incremental additions to the power grid. A key feature of the CM-BWR is the use of the unique F-Lattice. The F-Lattice employs a staggered row configuration for the...

In Japan, since plutonium is to be used as a nuclear fuel material under the nuclear energy policy, the objective of partitioning and transmutation (P&T) is oriented to removal and transmutation of mainly MA and long-lived fission products. Under the OMEGA (option making of extra gain from actinides and fission products transmutation) programme, on the basis of the double-strata fuel cycle conc...

Single crystals of superconducting BaFe1.8Co0.2As2 were exposed to neutron irradiation in a fission reactor. The defects introduced decrease the superconducting transition temperature (by about 0.3 K) and the upper critical field anisotropy (e.g. from 2.8 to 2.5 at 22 K) and enhance the critical current densities by a factor of up to about 3. These changes are discussed in the context of simila...

The major parts of the TRIGA-LASER experiment for collinear laser spectroscopy on exotic fission products from the TRIGA research reactor [1] are now installed and are currently being commissioned. Besides the exploration of unknown ground in the nuclear chart with respect to spins, moments and charge radii, the experiment is the prototype of the the LaSpec experiment [2] at FAIR, GSI and will ...