Search results
Results from the WOW.Com Content Network
A gas-cooled reactor (GCR) is a nuclear reactor that uses graphite as a neutron moderator and a gas (carbon dioxide or helium in extant designs) as coolant. [1] Although there are many other types of reactor cooled by gas, the terms GCR and to a lesser extent gas cooled reactor are particularly used to refer to this type of reactor.
A gas-cooled nuclear reactor is a type of nuclear reactor in which gas, typically helium or carbon dioxide, is used as the primary coolant to remove heat produced by nuclear fission in the reactor core. Unlike water-cooled reactors, which are more common, gas-cooled reactors have some distinctive characteristics that make them attractive in ...
A high-temperature gas-cooled reactor (HTGR) is a type of gas-cooled nuclear reactor which use uranium fuel and graphite moderation to produce very high reactor core output temperatures. [1] All existing HTGR reactors use helium coolant. The reactor core can be either a "prismatic block" (reminiscent of a conventional reactor core) or a "pebble ...
Coupled Neutron Transport and Thermal Hydraulics Code System for 3-D Transient Analysis of Gas Cooled High Temperature Reactors. 10.13140/2.1.3526.3369. Ortensi,J., Boer, B, and Ougouag, A,. Thermo-mechanical Analysis of Coated Particle Fuel Experience a Fast
Commercial gas cooled reactors are currently in use only in the United Kingdom. International interest in developing high temperature gas cooled reactors is increasing because they can provide efficient and cost effective electricity and produce high-temperature process heat usable for various industrial applications.
The gas-cooled fast reactor (GFR) system is a nuclear reactor design which is currently in development. Classed as a Generation IV reactor, it features a fast-neutron spectrum and closed fuel cycle for efficient conversion of fertile uranium and management of actinides. The reference reactor design is a helium - cooled system operating with an ...
High-temperature gas-cooled reactors (HTGRs) are nuclear reactors with helium coolant, graphite moderator, and all-ceramic clad fuel elements with core outlet temperatures up to 700°C–1000°C. Compared to conventional light water reactors, HTGRs offer inherent safety, high power generation efficiency, and, in particular, the ability to ...
The Advanced Gas Reactor (AGR) represents the generation II of British Gas-Cooled Reactors, developed from the earlier generation I Magnox reactor design (see “Magnox Design” on page 7) of gas-cooled reactors. In the UK there are currently seven AGR nuclear power stations (5 in England and 2 in Scotland) each with two operating reactors.
High-temperature gas-cooled reactors (HTGRs), also known as very-high-temperature reactors (VHTR) are Generation IV reactors that can operate at very high temperatures and use a graphite-moderated gas-cooled nuclear reactor with a once-through uranium fuel cycle. This design permits a very high outlet temperature in the order of 1 000°C.
Graphite-moderated gas-cooled reactor technology has gradually been abandoned in France, Italy, Spain, and Japan, and only accounted for 4% of worldwide nuclear capacity in 2008. The British AGR and MAGNOX reactors are the only types still in operation. All of them should be decommissioned by 2020.
Gas-cooled reactors are a type of nuclear reactor where a gas, typically helium, carbon dioxide, or a mixture of the two, is used as a coolant to remove heat generated in the reactor core. This type of reactor design has been used for both power generation and research purposes, offering certain advantages over other types of reactors.
1. INTRODUCTION AND BACKGROUND. The high-temperature gas-cooled reactor (HTGR) is an advanced nuclear reactor design that can supply high-temperature heat energy of 750–950°C by using a specialized fuel coated with ceramics, such as carbon and silicon carbide, inert helium gas as a coolant, and graphite as a moderator.
Typical gas-cooled reactors operate in the range of 700–800°C outlet temperature, compared with 300–325°C for light water reactors. The advantage of the higher temperature is a higher efficiency conversion of the core heat to electricity and the ability to support a much broader range of industrial heat applications.
Gas-cooled reactors (GCRs) are a type of advanced nuclear reactor that use gas as the primary coolant, rather than the more conventional water-based coolants. The use of gas as a coolant provides several advantages, including improved safety, increased thermal efficiency, and enhanced potential for load-following capabilities.
traditional light water reactors (LWR). Liquid Metal-Cooled Fast Reactor uses metal (sodium or lead) as a coolant instead of water, allowing the coolant to operate at higher temperatures and lower pressures than current reactors. Gas-Cooled Reactor is cooled by flowing gas and designed to operate at high temperatures.
Gas cooled reactors (GCR), used in Japan and the UK, use graphite as a moderator and pressurized CO2 as a coolant. It is a double-circuit power plant. Gas-cooled Reactor (GCR) and Advanced Gas-cooled Reactor (AGR) - Nuclear energy - Energy Encyclopedia
High-temperature gas reactors can efficiently produce heat for clean power or to drive energy-intensive industrial applications. High-temperature gas reactors use helium gas and ceramic materials to stabilize the fission process inside the reactor core. They run on ceramic-coated fuel particles and are designed to efficiently produce heat (~750 ...
The GFR system is a hightemperature heliumcooled fastspectrum reactor with a closed fuel cycle. The reference design for GFR is 2 400 MWth. The high outlet temperature of the helium coolant makes it possible to deliver electricity, hydrogen, or process heat with high conversion efficiency. As a one of fast reactor would produce heat about 850 ...
Gas cooled reactors represent about 3% of the total number of reactors in commercial operation worldwide – all of them carbon-dioxide gas cooled reactors in the UK that will be phased out around the mid-2020s. HTGRs currently under development use helium as a coolant rather than water, the most common coolant in the existing reactor fleet.
X-energy, located just outside the nation’s capital in Rockville, Maryland, is working on a pebble bed, high-temperature gas-cooled reactor that the company says can’t melt down. The company's Xe-100 reactor and specialized uranium-based pebble fuel could be available in the market as early as the late 2020s and is one of two designs that ...