This is looking grim. #2 is the reactor that had an explosion that damaged the torus. That would compromise the basic pressure-temperature design of the whole reactor and make cooling more difficult. If there are 500 millisievert levels inside the turbine building or the reactor building no one can work there and a hydrogen explosion could release vastly more radioactive material than we have seen heretofore.

"It is not necessary to have hope in order to persevere."