Struggling Toshiba Corp. said Tuesday it is considering selling a majority stake in its U.S. nuclear unit, Westinghouse Electric Co., aiming to stem further losses from its troubled nuclear business.

"How we can shut down the risk from the overseas nuclear business is a big issue for us," Toshiba President Satoshi Tsunakawa said during a news conference at the company's headquarters in Tokyo.

Chinese firms are likely to show interest in Westinghouse because more reactors are expected to be built in China, some experts have said. It's unclear, however, whether the U.S. government would allow such a sale.