Toshiba Corp. of Japan has signed an agreement with a Kazakh company on the sale of 10 percent of Westinghouse Electric Co. LLC for 540 million dollars, The Wall Street Journal reported on Tuesday.

Toshiba will retain a 67 percent stake in Westinghouse, a U.S. nuclear-reactor manufacturer, after the deal with Kazakh state nuclear-fuel company Kazatomprom, said the report.

Shaw Group Inc. of the United States owns a 20 percent stake in Westinghouse and Japanese heavy machinery maker IHI Corp. holds a 3 percent stake.

Kazatomprom is the third-largest uranium producer in the world and aims to become the leading uranium miner by 2010 with planned output of more than 15,000 tons.