from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An automatic safety feature of nuclear reactors where the control rods are automatically dropped into the reactor core when any of several emergency conditions are reached.
  • n. The process of dropping the control rods into the reactor core.
  • n. The procedure technicians follow in the hours following the instantaneous event of the rods dropping.


Sorry, no etymologies found.


Sorry, no example sentences found.

Wordnik is becoming a not-for-profit! Read our announcement here.


Log in or sign up to get involved in the conversation. It's quick and easy.