The Generation IV Pebble Bed Modular Reactor (PBMR) is being considered as a promising concept to produce electricity or process heat with high efficiencies and unique safety features. The PBMR is a high-temperature, helium-cooled, graphite moderated reactor. The fuel elements consist of 6 cm diameter spherical graphite “pebbles” containing each thousands of uranium dioxide microspheres. As the...

A feasibility study of a conventional fixed-bed reactor and packed-bed membrane (PBMR) in distributor configuration is carried out for the selective oxidation methanol to oxygenates dimethoxymethane methyl formate on VOx/TiO2 catalyst. Kinetic experiments provided reaction network reliable kinetic model six main reactions involved. The PBMR offers significant advantages potential formation both...

This paper develops two different approaches for downscaling (disaggregation) passive microwave derived soil moisture from coarse resolution L-band observations. Ground and airborne data collected over Walnut Gulch experimental watershed during the Monsoon ’90 experiment were used to test these approaches. These data consisted of eight micrometeorological stations (METFLUX) and six flights of t...

R & D Journal of the South African Institution of Mechanical Engineering 2012,28,25-30 http://www.saimeche.org.za (open access) © SAIMechE All rights reserved. 25 The Pebble Bed Modular Reactor (PBMR) is a Generation IV graphite-moderated helium cooled nuclear reactor developed in South Africa from the German Arbeitsgemeinschaft Versuchreaktor (AVR). After decommissioning of the AVR plant, radi...

Information technology (IT) is increasingly used in medicine, mainly for processing medical data. Understanding how IT affects the documentation and security of medical data and how users adapt IT systems can help to improve the quality of medical data and consequently the quality of medical care. Aim: The aim of this thesis was to explore the impact of IT on the documentation and the security ...

This paper considers the development of a PID control strategy to optimally control the power output of a High Temperature Gas-cooled Reactor (HTGR) power plant. A specific type of HTGR called the Pebble Bed Modular Reactor (PBMR) that utilises a closed recuperative Brayton cycle with helium as working fluid is considered. The power control of this kind of plant is significantly different from ...