Three Mile Island - The Disaster

NO water was getting to the emergency pump - the lines were closed
- one light signaling that lines were closed was covered by a maintenance tag.
- other light - who knows?
The relief valve did not close
- With valve open, radioactive water escaped to drain tank.
Over 100 alarms went off in two minutes
- Computer printer was hopelessly behind the times - 1 item every 4 seconds.