There was massive financial fraud at Westinghouse. Even though the nuclear industry is in a downturn, the troubles at Westinghouse are self inflicted - Toshiba bought them, but found out almost all of the unit's profits are misreported, leading to them spending money on "nothing" basically. The unit earned no money and was threatening to sink Toshiba the entire keiretsu. This is Toshiba trying to save itself by closing down the tide of red.

The source of the troubles was Westinghouse's purchase of CB&I Stone & Webster, and it spun out of control.