1. The reactor is expected to go into operation no earlier than 2020.

2. Tokyo Electric hopes to begin removing fuel debris from the reactor cores in 2021.

3. The reactor was shut down in 2007.

4. Officials discovered the system failure after an alarm sounded at reactor number three.

5. Iran will also halt work at its plutonium reactor and provide access to nuclear inspectors.

6. Japan is shutting down its last functioning nuclear reactor, with no timetable for a restart.

7. They hold reactor maintenance equipment, not rubble.