Explanation

Natural water. Also known as ordinary water. With a molecular weight of 18, natural water has superior moderating ability. It is a good moderator. Due to its relatively large thermal neutron capture cross-section. When using water as a moderator. Only by using enriched uranium can a critical system be obtained. But its slowing down length is short, which can reduce the core size. The thermal conductivity of water is smaller than that of liquid metal, but it has a high specific heat [capacity. Low viscosity, easy pumping, meaning it is a good coolant.

Classification