Notable Isotopes 
10B [5 neutrons]
Abundance: 19.9%
Stable with 5 neutron
| In nuclear reactors, 10B is used for reactivity control and in emergency shutdown systems. It can serve either function in the form of borosilicate control rods or as boric acid. In pressurized water reactors, boric acid is added to the reactor coolant when the plant is shut down for refueling. It is then slowly filtered out over many months as fissile material is used up and the fuel becomes less reactive. |
11B [6 neutrons]Abundance: 80.1%
Stable with 6 neutron