Pebble bed reactor

advantages and disadvantages of the pebble-bed reactor. The pebble-bed reactor (PBR) is a graphite-moderated, gas-cooled nuclear reactor. It is a type of very-high temperature reactor, one of the six classes of nuclear reactors in the Generation IV initiative. 2 Design of a PBR The basic design of pebble-bed reactors features spherical fuel elements called pebbles. These contain a large amount of micro-fuel

backyards, and playgrounds. Two hundred and forty-eight different chemicals were found buried beneath this community. Eight-hundred families had to relocate. (Softschools.com). Chernobyl is located in Ukraine, this natural disaster was the explosion of reactor number four, and occurred while under maintenance check. This explosion let out two-hundred times the amount of radiation than Hiroshima and Nagasaki. Seven Million people were affected, and three-hundred and fifty thousand people were forced out

Applying a coating to small particles can be done in a fluidized bed reactor [1]. The advantages and disadvantages of fluidized bed reactors are given by Kunii and Levenspiel [1] with themain advantages being: • Easily controlled operating due to liquid like behavior of particles. • High mass and heat transfer between gas phase and particles. • Fast mixing, which leads to resistance against rapid changes, making the process safer. Coating of particles can be done on two different scales. On the nanoscale

as well as other new catalysts. Beside catalyst, reactor design is of high importance. There are different types of reactors for performing FTS such as multi-tubular fixed bed reactors (also named trickle bed reactor, developed by Shell), Slurry Bubble Column Reactors (or SBCR, developed by Sasol), Fluidized bed and circulating fluidized bed reactors (namely Synthol, invented by Kellogg and developed by Sasol) [9, 14, 15]. Although each reactor has it's own advantages, but ease of

High Temperature Gas cooled Reactors (HTGR) are being accepted by many countries today due to the increase interest as a future energy option. The research on HTGRs are being conducted in China and Japan, and also two new nuclear plant designs are being chased as an international project (4). These reactors are used in nuclear power plants to generate electricity and also new nuclear fuels. However, can these HTGRs be used in residential areas? Gas-cooled nuclear reactors was originated by a professor

not an issue for nuclear energy as it is a long process where one reaction could take decades, constantly providing energy that can be slowed down or sped up. Uranium is a highly unstable radioactive element that is most commonly used in nuclear reactors all over the world. Australia has the highest supply of uranium that any other country in the world. There has been one research nuclear plant since the 1980’s but currently; Australia does not have

originally developed in-house and designed by Varma [49] and the team of Oak Ridge National Laboratory (ORNL) to allow researchers to image and quantify the internal distributions of two- or three-phase flow, which is encountered in different multiphase reactors or flow systems at different operating conditions in a noninvasive way. This technique has been applied successfully to different multiphase flow systems in our laboratory (mReal) at the Chemical and Biochemical Engineering Department at Missouri