1.   Even the most optimistic officials think it will take three years to restart the fast-breeder reactor, where the leak of dangerous sodium coolant occurred in December.

2.   Even optimistic officials think it will take three years to restart its fast-breeder reactor, where a leak of dangerous sodium coolant occurred in December.

3.   If the sodium coolant had burned through the plates to reach a concrete foundation, an explosion could have occurred, the report said.

4.   In an accident last year in western Japan, a fast-breeder plutonium reactor spewed caustic sodium coolant and overheated.

5.   In the accident, tons of caustic liquid sodium coolant leaked in what scientists called a very serious incident.

6.   Officials have said most of the two to three tons of sodium coolant that leaked would not have done so if workers had shut down the reactor more quickly.

7.   The advanced boiling water reactor is of a different design than the plutonium-fueled fast-breeder reactor that spewed caustic sodium coolant and overheated in December.

8.   Tons of caustic sodium coolant was spilled in the accident, and some of which exploded, when a secondary cooling system in the reactor overheated.

9.   With its potentially explosive liquid sodium coolant, taking apart Superphenix is a harrowing operation that will likely cost billions of dollars and take more than a decade.