nuclear reactor nuclear reactor or a nuclear reactor a device for performing a set of nuclear reactions under control the laboratory scale apparatus for the production of specific isotopes radioactive materials radioisotopes prtvdarvha as well as for medical and laboratory and industrial scale for the production of electricity are made history the first controlled nuclear fission energy was achieved in december construction and operation of a cell led by a form of graphite bricks and uranium and uranium oxide fuel successfully concluded the cell nuclear football at the university of chicago was the first nuclear reactor was operating reactor building despite the diversity of the reactors almost all of them are composed of the same components these components include the fuel cover fuel to slow neutrons from fission cool stacks for transporting thermal energy from the fission process is controlled to control the fission rate fuel for nuclear reactors should be such that undergo fission neutrons can be obtained five fissile nuclides that are currently used in reactors th u u u pu some nuclides from the thermal neutrons for fission and some fast neutrons are also produced by fission reactor fuel is a difference between property in uncategorized the ability of fission fuel used in nuclear reactors must be able to meet other needs fuel must be mechanically strong chemically stable against the radiation damage resistance so the reactor does not undergo physical and chemical changes the thermal conductivity of the material must be high enough so that the heat can move easily it is also possible to obtain making a comfortable relatively low cost and non hazardous chemicals and other benefits in terms of fuel pod reactor nuclear fuels are put directly into the reactor but has always been used as a cover covered or sheathed fuel moderator and coolant it apart this corrosion protection and fuel the spread of fission products from irradiated fuel to the environment is prevented the pods could also fuel support structure and heat transfer to help materials such as fuel pods have good thermal and mechanical properties and the chemical interaction with the fuel material is stable environment it is sheathed with a low cross towards nuclear interactions of neutrons and is resistant against radiation neutron moderator materials a substance that can slow or rapid thermal neutrons are used up the kernel has a mass close to the mass of the neutron is slow is best the reactor will be used for the lower neutron absorption cross section should be due to the properties of slow there are some substances that can be used hydrogen deuterium beryllium and carbon are some examples moderator because beryllium is toxic it is too low to be used in reactors the isotopes of hydrogen heavy water and the water and carbon in the form of graphite as a material to be used heavy water in some types of nuclear reactors as a neutron moderator is used they can react with uranium to neutrons than conventional light water or water can also be used as a moderator but because light water absorbs the thermal neutrons are light water reactors need enriched uranium to use high purity but heavy water reactors can not enrich uranium or conventional uses heavy water so the discussion is to prevent the development of nuclear weapons heavy water reactors can be built in a way that requires no equipment enriched uranium to make plutonium for use in nuclear weapons however conventional uranium for use in nuclear weapons could be used in other ways too this material controls but in non industrialized countries like america and canada it means much gram and kilogram quantities without any specific authorization of the manufacturers or supplier chemicals supplied the price per kilogram of heavy water with a purity of in about to dollars it also can not use enriched uranium and heavy water plutonium production reactor construction just as pure carbon super slow since the nazis use of impure carbon use they did not notice the truth of america's first experimental nuclear reactor in and the manhattan project and the trinity test of the plutonium bomb known as fat man the manufacture of enriched uranium or heavy water is not used cooler heat from fission in the reactor or fuel must be removed from the heat too high or the fuel rods melt heat is the fuel in the reactor power may be used to generate electricity characteristics of the coolant should be directed to heat the heat transfer can be effective also chemical stability and lower neutron absorption cross section of two major properties knndhast cool another point that must be noted