各种反应堆的原理（The principle of various reactors）.docVIP

各种反应堆的原理（The principle of various reactors） All kinds of reactor principle of.Txt great mercy no tears, Dawu speechless, silent laughter. The money in our hands is a tool to keep us free. A woman must go to a beauty parlor before she goes on a date; she must go to the bank before a man goes on a date. The principles of various reactors Concept of thermal reactor In 235 the original neutron uranium in nuclear, nuclear becomes unstable, will split into two smaller mass of new nuclear nuclear fission reaction, this is called, the energy released by the fission energy; tremendous energy at the same time, will also release 2 to 3 neutrons and other radiation. These neutrons then scored 235 other uranium nuclei, causing new nuclear fission, new fission produces new neutron and fission energy, so continue on the formation of the neutron release chain reaction by using the principle of nuclear reactor built the fission reaction when the reducer, then cause new nuclear fission due to thermal motion velocity and molecular neutron balance state, this is called thermal neutron neutron. A reactor that is mainly caused by thermal neutrons in a reactor is called a thermal reactor. Thermal neutron reactor, which is used to decrease the speed of fast neutron moderator, making thermal neutron (or neutron), a recycling device for thermal neutron chain reaction. Due to the thermal neutron is more likely to cause fission uranium - 235 etc., so, with a small amount of fissile material can obtain fission chain reaction. The moderator is containing light elements and less neutron absorbing substances, such as heavy water, beryllium, graphite, water etc.. Thermal neutron reactor fuel element generally is arranged in the moderator, composed of core. The chain reaction is carried out in the core. The reactor must carry the fission energy out of the core with coolant. Coolant is also a substance that absorbs very little neutrons. The most common refrigerants in thermal reactors are light water