The source said Westinghouse will return to its roots as a nuclear specialist .
Toshiba will stop taking on projects to build entire nuclear plants just so that Westinghouse can sell its AP1000 reactors .
The source said Westinghouse will return to its roots as a nuclear specialist , while Toshiba will stop taking on projects to build entire nuclear plants just so that Westinghouse can sell its AP1000 reactors .