Definīcija:materials with ultra-high neutron capture cross sections that significantly reduce neutron fields in a reactor, reducing reactivity, thereby creating a barrier to reactor operations. The nuclides 149Sm and 135Xe are two poisons that are produced as fission products with a high yield and which have an impact on reactor operations.
VVC izstrādātie inženierzinātņu, tehnikas, rūpniecības un būvniecības un arhitektūras termini