Several methods have been developed previously for estimating cumulative energy production and plutonium production from graphite-moderated reactors. These methods generally fall into the category of nuclear archaeology. The Graphite Isotope Ratio Method (GIRM) is one well-known technique of this type. This method is based on the measurement of trace isotopes in the reactor’s graphite matrix to...

Molten salts have recently received increased attention worldwide as key materials for sustainable and low-carbon energy supply technologies (e.g. thermal storage, concentrated solar power technologies, fission fusion nuclear reactors) thanks to their appealing thermo-physical properties. In particular, they are used fuel coolant in the Salt Reactor (MSR), considered a breakthrough technology n...

In this paper, we are interested in modelling the flow of the coolant (water) in a nuclear reactor core. To this end, we use a monodimensional low Mach number model coupled to the stiffened gas law. We take into account potential phase transitions by a single equation of state which describes both pure and mixture phases. In some particular cases, we give analytical steady and/or unsteady solut...

Heat transfer in closed channel flows of molten salts (MS)s, such as FLiBe or FLiNaBe, has been considered under specific reactor conditions. MHD effects have been accessed for two blanket concepts: self-cooled MS blanket, and dual-coolant MS blanket. The effect of heat transfer degradation due to turbulence reduction by a magnetic field in the First Wall channels of the selfcooled blanket was ...

In nuclear power plants (NPPs), one of the important yet uncertain phenomena during a station blackout (SBO) accident is possibility for counter-current natural circulation flow in reactor coolant system (RCS) pressure boundary, which could divert core melt progression and/or in-vessel fission product (FP) distribution and, turn, lead to heatup and eventual creep rupture. From risk management p...

Today, most software applications, also in the nuclear field, come with a graphical user interface. Recently, the Symbolic Nuclear Analysis Package (SNAP) was designed to simplify the process of performing safety analysis. The purpose of the present study was to develop an SNAP animation model for RELAP5 calculations of a nuclear installation. The facility selected was the Rig of Safety Assessm...

Microwaves have been widely used in the treatment of different materials. However, the existing adjustable power thermostatic reactors cannot be used to analyze materials characteristics under microwave effects. In this paper, a microwave thermostatic chemical reactor for processing liquid materials is proposed, by controlling the velocity of coolant based on PLC (programmable logic controller)...

The article presents an approach to design tubular reactors in recycle systems, based on non-linear analysis. A pseudohomogeneous plug-flow reactor model is used. It is assumed that the separation unit delivers product and recycle streams with fixed composition. The stand-alone reactor has a unique stable steady state. The coupled reactor /separation /recycle system shows four types of conversi...

Currently, more than 16% of world energy demand is fulfilled by nuclear power plants (NPPs). This amounts to 2800 TWh energy annually generated by more than 441 NPPs operating in 31 countries worldwide [17]. Amongst these NPPs, the LWRs contribute to more than 85% of total energy produced by all nuclear reactors [20]. With the advantage of being proven technology along with extensive operationa...

Abstract The article is devoted to the issues of nuclear energy. It considers a simplified dynamic model simulating main processes in power plant, including heat generation reactor. basis proposed release reactor, relative neutron and temperature coolant hot thread circulation circuit.