Helium Brayton cycles have been studied as power cycles for both fission and fusion reactors obtaining high thermal efficiency. This paper studies several technological schemes of helium Brayton cycles applied for the HiPER reactor proposal. Since HiPER integrates technologies available at short term, its working conditions results in a very low maximum temperature of the energy sources, someth...

Multiagent systems provide a powerful framework for developing real-time process supervision and control systems for distributed and networked processes by automating adaptability and situation-dependent rearrangement of confidence to specific monitoring and diagnosis techniques. An agent-based framework for monitoring, analysis, diagnosis, and control with agent-based systems (MADCABS) is deve...

The primary and secondary cooling systems of French pressurized water reactor contain many welded components with complex geometry : elbows, welding without smooth profile, nozzles. In service inspections of such components performed with conventional ultrasonic (US) contact transducers present limited performances. First, variations in sensitivity, due to unmatched contact on depressions or ir...

An interesting problem in chemical reactor theory is finding bounds or targets on a given performance index in a reacting system. Moreover, performance of the reactor subsystem has a key impact on the design of other processing subsystems. It determines the recycle structure of the process, the separation sequence and has a strong influence on the energy and environmental considerations. Howeve...

This paper presents the formulation of a controller for a Catalytic Flow Reversal Reactor (CFRR) with heat extraction. The controller is based on the Model Predictive Control (MPC) concept. The MPC scheme uses a model that assumes plug flow and neglects radial gradients in the reactor but accounts for the two phases within the reactor. The prediction of the future output behavior from the model...

Hydrogen storage systems based on the combination reactor concept are promising for application of future complex hydride materials with high storage capacities and low reaction kinetics at moderate operating temperatures. In such a reactor, a fast reacting metal hydride is added to a complex hydride material in a separate compartment of the tank combining the advantages of the high storage cap...

The choice of the most effective manner in which to operate an immobilized cell system is both complicated and, to some extent, a matter of guesswork. There is increasing awareness of the factors affecting reactor choice, and present work is aimed at making reactor performance more predictable.

Reactor engineering generally uses distributed parameter models for design purpose. These models are not often used for process control design. May the use of this kind of complex models improve control performance? This paper compares different control strategies based on a distributed parameter model to a time-scaled DMC that only uses a simple input-output model for the control of a bleachin...

in this paper, combustion of char in the riser of circulating fluidized bed was modeled using aspen plus. since physical and chemical phenomena are involved in the process, the model integrates the two-phase hydrodynamic sub-model with the reaction sub-model derived from the literature. in the proposed model, the fluidized bed is divided into several sections and the behavior of each section wa...

ultraviolet radiation (uvr) has been accepted as an attractive alternative to chlorination for the disinfection of wastewater. in this study the effluent from sahebgaranieh treatment plant was subjected to changes in uv transmission and turbidity in order to correlate these commonly measured parameters with the performance of a submerged -uv- reactor employed in disinfecting the effluent. studi...