The cash gives corporate successors the luxury of time and choice to recruit a new manager, hire a temporary executive or train someone already in the firm.
"Everything suggests it was a pure accident where several temporary and unfortunate circumstances caused the woman to set the train in motion when she was cleaning, " Paer Andersson said in a statement, according to AFP news agency.
And if an earthquake above a certain magnitude strikes, the bullet train will stop and nuclear and other plants will automatically go into temporary shut down.