| 1. | Because holmium strongly absorbs neutrons, it is also used as a burnable poison in nuclear reactors.
|
| 2. | It is used as a secondary, emergency shut-down measure in some nuclear reactors, particularly of the burnable poison.
|
| 3. | Nuclear fuels and reactors are designed to address this phenomenon through such features as burnable poisons and control rods.
|
| 4. | His first major invention in 1950 of " burnable poisons " made the development of a naval nuclear propulsion program feasible.
|