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

各种反应堆的原理（The principles of various reactors） The principle of various reactors The 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. The reactor is mainly composed of thermal neutron induced fission reactor called thermal neutron reactor (the 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 of the. The reactor must use coolant from the core to fission energy. The neutron absorbing material is also little coolant. Thermal neutron reactor coolant is the most commonly used water (water), water, carbon dioxide and helium. The internal nuclear power plant it usually consists of a loop and two loop system. The reactor is the core of nuclear power plants. When the reactor heat release, brought out by a coolant